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EP2707148A1 - Pump for metering and dispensing a liquid or viscous product - Google Patents

Pump for metering and dispensing a liquid or viscous product

Info

Publication number
EP2707148A1
EP2707148A1 EP12723130.6A EP12723130A EP2707148A1 EP 2707148 A1 EP2707148 A1 EP 2707148A1 EP 12723130 A EP12723130 A EP 12723130A EP 2707148 A1 EP2707148 A1 EP 2707148A1
Authority
EP
European Patent Office
Prior art keywords
pump
piston
product
chamber
needle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12723130.6A
Other languages
German (de)
French (fr)
Other versions
EP2707148B1 (en
Inventor
Jacques Gerbron
Patrick Lagneaux
Jian Jun YUAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2707148A1 publication Critical patent/EP2707148A1/en
Application granted granted Critical
Publication of EP2707148B1 publication Critical patent/EP2707148B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005Components or details
    • B05B11/0062Outlet valves actuated by the pressure of the fluid to be sprayed
    • B05B11/0064Lift valves
    • B05B11/0067Lift valves having a valve seat located downstream the valve element
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005Components or details
    • B05B11/0062Outlet valves actuated by the pressure of the fluid to be sprayed
    • B05B11/0072A valve member forming part of an outlet opening
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/04Deformable containers producing the flow, e.g. squeeze bottles
    • B05B11/047Deformable containers producing the flow, e.g. squeeze bottles characterised by the outlet or venting means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042Components or details
    • B05B11/1073Springs
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00Piston machines or pumps characterised by having positively-driven valving
    • F04B7/02Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated

Definitions

  • the present invention relates to a dosing pump and dispensing a liquid or viscous product, this pump being intended to be associated with a dispensing element forming part of a container containing said product.
  • US-A-4,830,284 discloses a dosing and dispensing pump for a product, in particular a liquid or a pasty substance, this product being contained in a receptacle on which the pump is fixed, for example by screwing on a threaded portion carried by an element of this container.
  • the dosing pump described in this document comprises in its interior a chamber, called pressure chamber, this chamber having an inlet for the product coming from the container and thus receiving this product prior to its distribution to the outside.
  • This chamber houses a piston that can move inside said chamber in the direction of its length, this piston being biased by a spring in a so-called rest position.
  • This chamber also communicates with a discharge chamber through an intermediate opening.
  • the delivery chamber communicates to the outside of the metering pump by an opening evacuate the product. This discharge opening is closed in the rest position of the piston by a shut-off valve. The volume of this chamber is variable and its increase causes the opening of the shutter valve.
  • the metering pump according to this document operates in the following manner.
  • the product to be dispensed is introduced into the pressure chamber through the inlet opening of this chamber with the container.
  • the piston is then moved from its rest position and no longer blocks the intermediate opening between the pressure chamber and the discharge chamber.
  • the product can therefore flow to the discharge chamber that it fills. Due to the pressure of the product in the discharge chamber, the volume of the discharge chamber is increased and the shut-off valve no longer closes the discharge opening of the metering pump. The product can therefore flow out of said pump.
  • the dosing pump according to this state of the art has several notorious disadvantages.
  • the first disadvantage is that the return spring is inside the pressure chamber. It is thus in contact with the product to be dispensed, which can both pollute the product to be dispensed and damage the return spring, for example by corrosion of said spring by the product if it ci is an acidic or basic substance or fouling said spring by the product if it is viscous or pasty.
  • the second drawback is that the communication between the pressure chamber and the discharge chamber involves a high number of elements. Indeed, in this document, there is provided a first elastic sleeve for the first head of the first chamber cooperating with a sealing shoulder and a second elastic sleeve for the piston head in the discharge chamber. This communication should be simplified by not involving such a large number of elements.
  • the publication DE 10 2008 027 598-A1 shows a fluid dispenser whose head comprises a fluid outlet opening.
  • a spring is housed to recall in position a piston moved during dis tribution.
  • a disadvantage is that the tightness control of such an assembly is in practice difficult or impossible so that scrap is detected late.
  • Another disadvantage is the complexity of the system.
  • the problem underlying the present invention is to solve all or part of the disadvantages of current techniques.
  • a metering pump and dispensing a liquid or viscous product intended to be associated with a container containing said product said pump having, at a so-called lower longitudinal end, an opening inlet for the passage of the product from the container and, at a so-called upper longitudinal end, an outlet opening for dispensing the product out of the pump, said pump having in its interior a main chamber receiving a piston provided with a body and a head, said piston being movable in the length of the main chamber,
  • said body having an internal pipe passing therethrough in the direction of its length and connected to the inlet opening at its lower part for the flow of the product coming from said inlet opening,
  • said body and the lower part of said piston head occupying the main chamber leaving only a separation chamber, arranged around the piston body, said piston head completely separating the separation chamber from a discharge chamber disposed close to the outlet opening, the upper part of said head having in its upper middle part means for closing said outlet opening, the internal pipe at its upper end opening indirectly in the discharge chamber for the flow of the product in said chamber, said discharge chamber having a variable volume according to the movement of the piston in the main chamber,
  • - return means being provided for acting on the piston by placing the closure means in the closed position of said outlet opening, characterized in that the separation chamber is sealed with respect to the flow of the product in n ' not being crossed by it.
  • said return means are housed in this separation chamber.
  • a technical effect thus obtained is a protection of the return means housed in a sealed chamber to the product to be dispensed against any damage by said product, for example by fouling or corrosion of these means due to a deposit of product on these products. means or prolonged contact of these means with the product. This allows safer operation of the entire pump as well as an increased life of the various elements of this pump.
  • the peripheral wall of the pump comprises an orifice which serves as a mouthpiece for checking any leaks.
  • this type of pump is normally difficult to control and the orifice solves this problem, as described below.
  • the container has an advantageously collapsable reservoir of product, and an outer shell deformable by pressure on the shell exerting pressure outside the tank and initiating the flow of the product to the pump.
  • the sealed chamber is also intended to be used during phases of leak testing of the device. Indeed, by injecting a control gas (such as air) into the chamber, it is possible to detect possible leaks, at the level of the assembly between the piston and surrounding components including the needle and the areas in contact with the piston on its periphery.
  • a control gas such as air
  • the invention may comprise a hole, accessible from the outside, to cooperate either with means for injecting a control fluid through the hole, or with leak detection means (a pressure sensor for example) when injecting fluids at other locations of the device).
  • leak detection means a pressure sensor for example
  • the closure means is the upper end of a needle extending between the upper end of the internal pipe and the outlet opening of the pump,
  • the needle has a stem and an upper end of rounded or pointed form
  • a portion of the rod is surrounded by an inner collar, the remaining portion of the rod and the upper end of the needle projecting upwardly from said inner collar, said inner collar being surrounded by an outer collar leaving a space between them, the needle and said flanges forming the piston head,
  • the needle has a passage for the product from the inner pipe being connected at its lower part to said inner pipe and at least one filling opening opening in the discharge chamber for the flow dd it produced in the chamber of repression,
  • the passage is formed by a longitudinal groove from the lower part of the needle vis-à-vis the inner pipe and sealingly communicating with said pipe, at least a portion of the groove forming a slot on the periphery of the needle , this slot serving as filling opening, the longitudinal groove extends over the entire width of the needle, two parts of the groove each forming a slot on the periphery of the needle, said slots being arranged in an opposite manner on said periphery,
  • the return means are at least partly housed in the separation chamber
  • the return means comprise a helical spring or at least one flexible blade surrounding the body of the piston over at least a part of its length
  • the return means comprise an element of elastically deformable material, preferably of elastomer,
  • the element of elastically deformable material is a hollow cylindrical body surrounding the body of the piston
  • the return means are fully housed in the separation chamber
  • the return means comprise at least one flexible section formed on the body
  • At least one flexible flange is a portion of the body having a frustoconical shape
  • the at least one flexible section is connected to the rest of the body by articulation zones
  • the articulation zones have a reduced thickness relative to that of the flexible section
  • At least two flexible faces are configured so as to form a bellows
  • the body and the head are two separate pieces fitted.
  • the outlet opening of the pump is in the extension of its inlet opening or forms an angle advantageously of approximately 90 ° with it
  • the body of the piston comprises a base towards its free end opposite to the head, the base cooperating in sliding fit with a guide jacket, the base comprises an external profile flaring towards the free end of the body,
  • the external profile is curved so as to achieve a convexity
  • the base comprises an internal profile flaring towards the free end of the body
  • the thickness of the base is decreasing in the direction of the free end of the body
  • the inner profile is curved so as to achieve a concavity
  • the main chamber is at least partially defined by a peripheral wall which has at least one opening opening on the one hand in the main chamber and on the other hand outside the pump.
  • the invention also relates to a reportable cap to be associated with a container containing a liquid or viscous product, characterized in that it incorporates such a metering pump and dispensing.
  • the invention relates to a container containing a liquid or viscous product and having a dispensing element of said product, characterized in that it comprises such a dosing pump and dispensing or such a plug reportable, the pump or cap being secured with said dispensing element.
  • the tank of the container is of flexible material, the pump being supplied with product by one or more manual pressures exerted on said reservoir and initiating the flow of the product to the pump.
  • the container has an advantageously collapsable reservoir of product and a bulb remotely connected to said reservoir by a conduit, one or more pressures exerted on said bulb being transmitted to the outside of the reservoir and initiating the flow of the product towards the pump.
  • the distribution of the product out of the container is by spraying, projection or flow.
  • a control method is another aspect of the invention, the method comprising the following steps:
  • control method may also be such that it comprises the following steps:
  • FIG. 1 is a diagrammatic representation of a longitudinal section of a dispensing element of a container provided with a metering and dispensing pump according to the present invention
  • FIG. 2 is a schematic representation of a perspective view of a piston half cut longitudinally with a punch forming part of an embodiment of the metering and dispensing pump according to the present invention
  • FIG. 3 is a diagrammatic representation of a perspective view of a piston with a pin belonging to the same embodiment of the metering and dispensing pump according to the present invention as that of FIG. 2,
  • FIG. 4 is a schematic representation of a section along the axis
  • FIG. 3 shows a piston with a needle belonging to the same embodiment of the dosing and dispensing pump according to the present invention as that of FIG. 2, transversely to the openings in the needle,
  • FIG. 5 is a schematic representation of a section along the axis
  • FIG. 6 is a diagrammatic representation of a longitudinal section of a distribution element of a container according to another embodiment of FIG. 1, said container being provided with a metering and dispensing pump according to the present invention; invention
  • FIG. 7 shows a variant of the invention
  • FIG. 8 shows another possibility of execution of the return means
  • the present invention relates to a pump 1 for dosing and dispensing a liquid or viscous product intended to be associated with the dispensing element 3 of a container 2 containing said product.
  • dispensing is meant any form of application of the product, for example spraying, spraying or flowing.
  • the dosing and dispensing pump 1 is integrally formed in a plug 4 which can be attached to any type of receptacle 2, mainly flexible tubes.
  • this plug 4 is screwed by a thread 8 on a dispensing element 3 which caps said container 2.
  • the container 2 will be described with the pump 1 dosing and dispensing disposed at its upper part.
  • This position is the conventional operating position of the pump 1 but it can operate when its longitudinal axis has an inclination relative to the vertical.
  • up and down will refer to what is opposite or turned towards the container 2.
  • the same will apply to the upper and lower parts, the upper parts being closer to the opening of the pump outlet as the lower parts and conversely with regard to their proximity to the container 2.
  • the dosing pump 1 receives the product from the container 2 through an inlet opening 18 and distributes the product to the outside of the pump through an outlet opening 7.
  • This outlet opening 7, in both embodiments shown in Figures 1 and 6, forms the dispensing opening of the container 2.
  • the dosing pump 1 and distribution also has in its interior a first room called master bedroom 9.
  • This room main 9 receives a piston 10.
  • This piston 10 is hollow in its interior by having an internal pipe 1 1 for the passage of the liquid or viscous product to be metered and dispensed.
  • the internal pipe 1 1 at least partially through the piston 10 in its length.
  • This internal pipe 1 1 may also be called the compression chamber of the product to be dispensed and may have a tank-shaped element that can serve as a product reservoir to be dispensed but it is not mandatory.
  • the piston 10 has a body 10a extending in the length of the main chamber 9 and a head 10b at its end farthest from the container 2.
  • the body 10a of the piston 10 comprises inside the inner pipe 1 1 and defines the inner pipe 1 1 of the main chamber 9, this sealingly by not allowing the product to enter the remaining part of the main chamber 9 no occupied by the piston.
  • This remaining portion of the main chamber 9, referenced 9a in Figure 1 and disposed between the body 10a of the piston 10 and the lower part of the piston head 10b 10, will hereinafter called the separation chamber.
  • return means 16 of the piston 10 recalling the latter in a position in which its head 10b is in the farthest position of the container 2, this position being designated by high position, this for the closure of the discharge opening 7 of the pump 1, as will be described later.
  • return means 16 advantageously comprise a return spring 16 at least partially surrounding the body 10a of the piston, this spring being advantageously a helical spring wound around the body 10a. It may also be other flexible elements, such as at least one flexible blade, for example plastic.
  • the body 10a of the piston completely traversed in the direction of its length by the internal pipe 1 1, cooperates with its lower end, that is to say its end closest to the container 2, directly with the opening of input 18 of the pump 1 for the flow of the product in said pump 1 from the dispensing element 3 of the container 2 so that all the product leaving this distribution element 3 passes directly through the internal pipe 1 1 of the piston 10.
  • the end of the body 10a is advantageously guided in translation by a surface serving as a guide liner 20 for the base 21 of the piston 10a.
  • the guide liner is preferably cylindrical and may be formed in the cap 4, advantageously integrally with the latter.
  • a cylinder-to-cylinder contact is, in the embodiment illustrated in particular in FIG. 1, produced between the guide liner 20 and the base 21 of the piston, and seals at the level of the inlet opening 18.
  • the base 21 has a flared profile widening towards the end of the body 10a of the piston 10.
  • this flared profile is curvilinear so as to form a bulge on the internal face and / or the external face.
  • the flared shape preferably has a decrease in thickness towards the end of the body 10a so as to increase its deformability at this level.
  • the flared profile makes it possible to limit the friction between the jacket 20 and the base 21 by reducing the contact surface.
  • a natural propensity of the product to be delivered is added to pass through the internal pipe 11.
  • the upper part of the head 10b of the piston 10 delimits a separating chamber 9a and a third chamber, hereinafter referred to as the delivery chamber 5.
  • the head 10b is arranged so as to have the internal pipe 11 under its lower part. and the discharge chamber 5 over a large part of its upper surface with the exception of the middle portion of this upper surface forming a support carrying the closure means 12a pointing to the outlet opening 7 of the pump 1.
  • This discharge chamber 5 has a variable volume as will be seen later as will be detailed the characteristics of the closure means 12a and its support.
  • FIGS. 2 to 5 which show enlargements in section and / or in perspective of the piston 10 shown in FIG. 1, make it possible to better distinguish the various elements forming this piston 10.
  • the closure means 12a carried by the head 10b of the piston that is to say the upper end opposite the container, is formed of the upper end or distal end of a needle 12 extending in the length of the piston 10, starting from the underside of the piston head 10b and projecting from the upper face of said head 10b towards the outlet opening of the pump.
  • the needle 12 thus forms the sealing means 12a and its support.
  • This needle 12 is therefore formed of an upper end 12a, serving as closing means of the outlet opening and a rod 12b received at least partially in the piston 10, in Figures 2 to 5 its lower part and a portion of its middle part.
  • This upper end 12a of the needle 12 may have a rounded or pointed shape. A rounded or pointed shape ensures a better seal between the upper end 12a of the needle 12 and the outlet opening of the product out of the pump.
  • the rod 12b of the needle 12 may be of cylindrical shape.
  • the needle 12 has a longitudinal groove 6 on a major portion of its middle part and on its lower part, this groove 6 passing through it entirely in the direction of its width to this figure, but this is not obligatory.
  • This longitudinal groove 6 opens at its lower part above the internal pipe 1 1 of the piston 10 and thus allows the flow of the product contained in this pipe 1 1 through the portion of the needle 12 in which it extends.
  • the longitudinal groove 6 communicates in a sealed manner with said internal pipe 1 January.
  • the internal pipe 1 1 opens indirectly into the discharge chamber to allow the flow of the product in said chamber, since it is the groove 6 inside the needle 12 which forms the flow passage of the product being connected to the upper end of the inner pipe 1 1 and opening into the discharge chamber.
  • this longitudinal groove partially leaves the piston 10 when the needle 12 is disposed in and on the piston head 10b to form the upper part thereof.
  • This provides at least one slot 6a formed by a portion of this groove, this slot 6a acting as a filling opening to serve for the flow of the product from the internal pipe into the discharge chamber which had been referenced 5 in Figure 1.
  • This delivery chamber is thus placed in communication with the container for the flow in this chamber of the product to be assayed and dispensed.
  • the longitudinal groove passes through the needle 12 over all its width, it advantageously creates two slots forming two diametrically opposite openings.
  • the longitudinal groove is designed so that a single slot 6a opens only on one side of the needle 12.
  • the piston head 10b is composed of an outer flange 13 projecting laterally from the body 10a of the piston flaring upwards.
  • the piston head 10b also comprises an inner flange 14 surrounding the lower part and at least partially the middle part of the needle 12.
  • the piston head 10b therefore consists of the needle 12 and the flanges 13 and 14.
  • the outer flange 13 and the inner flange 14 define a space 15 between them.
  • This space 15 decreases as it approaches the body 10a of the piston 10.
  • This space 15 is part of the discharge chamber and advantageously serves as a storage tank. produced when it is contained in the delivery chamber.
  • the upper end 12a of the needle 12 serves as a closure element, this upper end 12a being able to close off the outlet opening 7 of the delivery chamber 5, thus preventing the product contained in the chamber of repression 5 to leave this one to be dispensed to the outside of the metering pump 1 and accordingly to the container 2.
  • FIG. 6 shows another embodiment of the arrangement of a metering and dispensing pump according to the present invention on a liquid or viscous product container to be dispensed.
  • the cap 4a of the container incorporates the dosing and dispensing pump 1 always towards its upper part but perpendicularly to a conduit 17 for feeding the product contained in the tank not shown in this figure.
  • This pipe 17 opens on the internal pipe 1 1 of the pump 1.
  • the pipe 17 and the inner pipe 1 1 then form between them an angle, in Figure 6 a right angle, in the cap 4a of the container.
  • the outlet opening 7 of the product is then positioned laterally to the plug 4a and not above it as was the case in FIG.
  • the operation of the pump 1 is the same and it has the same constituent elements as those mentioned in the first embodiment shown in Figure 1, in particular with the presence of the needle 12 and its upper end 12a serving as shutter element at the outlet opening 7 of the product.
  • an orifice 22 is formed through the peripheral wall 24 delimiting the main chamber 9.
  • the peripheral wall 24 is also, in the case of the illustration, embedded in a seat 23, for example integral with the remainder of the plug 4, so as to preserve an air passage between the outside and the orifice 22.
  • Several orifices 22 may be provided. Their placement may also differ from the example shown.
  • Figures 7 to 9 show three other embodiments of the invention. More precisely, these figures illustrate alternative or complementary possibilities of making the return means.
  • the return means 16 are as in previous cases housed in the volume of the chamber 9a. By cons, they are here made in the form of an element whose material is elastically deformable. Preferably, an elastomer is used to form the biasing means 16 in this case.
  • the return means 16 are in the form of a cylindrical element, of circular section, extending between the guide sleeve 20 with respect to which the body of the piston 10 is slidably mounted and, at the other end, a bearing end 25 being applied to an application portion of the piston head.
  • the return means consist or comprise at least one flexible panel 26.
  • a single panel 26 is formed and extends from a base portion of the piston 28 connected to the peripheral wall. 24 tightly.
  • a hinge 27 constitutes the connection point between the base 28 and the flexible panel 26.
  • the flexible panel also has a hinge area 27 relative to the rest of the body 10a of the piston 10.
  • the flexible panel 26 has a geometric shape such that it comprises a component which is not oriented in the longitudinal direction of the assembly (the direction of translation of the piston 10). In this way, during a translational movement of the piston 10, the pan 26 undergoes a stress differing from a compression and in particular a bending that can be used as an elastic return element.
  • the joints 27 may comprise a constriction, that is to say make a variation in thickness relative to the thickness of the pan 26.
  • This embodiment is shown in Figure 8.
  • a this figure also shows an alternative formation of the piston 10 in which the body 10a and the head 10b are made of two separate rooms. These parts are assembled by a female male fitting system. In the case illustrated, it is the body 10a which comprises a sleeve 30 of the female type adapted to receive the lower end of the piston head 10b. Other configurations are of course possible.
  • the pipe 1 1 of the piston 10 is thus formed partly in the body part 10a and for another part in the head piece 10b.
  • the portions of the pipe 1 1 of these two parts are configured to achieve continuity and are preferably of the same shape and the same diameter.
  • this embodiment makes it possible in particular to differentiate the materials used for the body 10a and for the head 10b or to replace a defective part without having to replace the other part.
  • FIG. 9 shows another possible embodiment of the return means.
  • it takes advantage of the bending pan 26.
  • a plurality of sections 26 are implemented and, more particularly, made in adjacent form so as to form bellows.
  • the panels 26 are here contiguous and of alternating direction around joints 27.
  • it is advantageous to implement panels which are parts of the length of the body 10a of frustoconical section.
  • the number of panels 26 is not limited and it will be noted that in the case shown in FIG. 9, eight alternating steering faces have been used so as to form the bellows.
  • the piston 10 is directly secured to the base at the peripheral wall 24 so that its lower end does not have to translate vis-à-vis a shirt of guidance 20 as in the preceding embodiments. This eliminates the need for mobility and sealing.
  • a piston body 10a made of polypropylene and / or advantageously, as in the case of the elastic return means 16 of Figure 7, elastomer such as EVA (ethylene vinyl acetate) or SEBS (polystyrene-b-poly (ethylene-butylene) -b-polystyrene).
  • EVA ethylene vinyl acetate
  • SEBS polystyrene-b-poly (ethylene-butylene) -b-polystyrene
  • one aspect of the invention consists in implementing a method of checking the seal at the piston 10.
  • a defined pressure gas is injected through the orifice 22. Any leaks are detected in case of pressure drop.
  • the control has the advantage of being operable without deterioration of the pump and without disassembly of its components. It can therefore be repetitive on many parts produced or even be systematic.
  • the separation chamber 9a therefore also serves as a sealing control volume.
  • the orifices 22 are releasable after control.
  • the method of the invention may be such that the orifice 22 is used to position a leak detector.
  • other parts of the pump are pressurized and leaks are detected at the orifice 22.
  • the test is started by the admission of a fluid of control via the inlet opening 18 of the pump and it is verified that no leak is observed at the orifice 22. Then, a control fluid is admitted via the outlet opening and the verification is carried out determining whether leaks are detected at the orifice 22.
  • the initial verification may then be resumed by the admission of control fluid through the inlet opening 18.
  • the pump 1 can operate in the following manner.
  • Pressure is exerted on an element of the container 2 containing the product to be dispensed. This may, for example, be done on the wall of the body of the container 2 even when it is of flexible or deformable material, especially when the container is made of plastic material and preferably when it has the shape of a tube, this by one or more manual pressures.
  • the discharge chamber 5 expands and its volume increases, which lowers the piston head 10b towards the bottom of the pump 1 and lowers the needle 12 with the entire head 10b. This occurs against the restoring force exerted by the return means 16 housed in the separation chamber 9a sealed and / or formed by the flexible panels.
  • the upper end 12a of the needle 12 serving as a closure element to the outlet opening 7 of the pump, is released from its closed position of this outlet opening 7 and no longer obturates it.
  • the product can leave the discharge chamber 5 to be dispensed to the outside, preferably by spraying, this especially for liquids.
  • the advantages of using a needle to shut off the outlet opening of the pump are among other things that the needle can be advantageously made as an independent part of the flanges forming with it the piston head. Indeed, as the needle and in particular its upper end is the part of the piston head receiving the most loads, this when it is pushed against the outlet opening of the pump under the action of the return means, the needle is more likely to wear than other parts forming the piston head. With a removable needle, it is possible to make its change without having to change the entire piston head and even the entire piston if the head is integral with the piston body.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

The present invention relates to a pump for metering and dispensing a liquid or viscous product. This pump (1) is characterized in that the separation chamber (9a) between the main chamber (9) and piston (10), said piston (10) impelling the product toward the outlet aperture (7) of the pump (1), is sealed to the flow of the product, the latter not passing through said separation chamber, and in that the means (16) for returning the piston to its position blocking the outlet aperture (7) may be housed in this separation chamber (9a). Application to the field of dispensing a liquid or viscous product from a recipient, especially to spraying of said product.

Description

« Pompe de dosage et de distribution d'un produit liquide ou visqueux »  "Pump dosing and dispensing a liquid or viscous product"
La présente invention concerne une pompe de dosage et de distribution d'un produit liquide ou visqueux, cette pompe étant destinée à être associée à un élément de distribution faisant partie d'un récipient contenant ledit produit. The present invention relates to a dosing pump and dispensing a liquid or viscous product, this pump being intended to be associated with a dispensing element forming part of a container containing said product.
De telles pompes de dosage sont déjà connues de l'état de la technique.  Such metering pumps are already known from the state of the art.
Par exemple, le document US-A-4 830 284 décrit une pompe de dosage et de distribution d'un produit, notamment un liquide ou un corps pâteux, ce produit étant contenu dans un récipient sur lequel la pompe est fixée, par exemple par vissage sur une portion filetée portée par un élément de ce récipient.  For example, US-A-4,830,284 discloses a dosing and dispensing pump for a product, in particular a liquid or a pasty substance, this product being contained in a receptacle on which the pump is fixed, for example by screwing on a threaded portion carried by an element of this container.
La pompe de dosage décrite dans ce document comporte en son intérieur une chambre, dite chambre de pression, cette chambre présentant une ouverture d'admission du produit venant du récipient et recevant donc ce produit préalablement à sa distribution vers l'extérieur. Cette chambre loge un piston qui peut se déplacer à l'intérieur de ladite chambre dans le sens de sa longueur, ce piston étant rappelé par un ressort dans une position dite de repos. Cette chambre communique aussi avec une chambre de refoulement par une ouverture intermédiaire. The dosing pump described in this document comprises in its interior a chamber, called pressure chamber, this chamber having an inlet for the product coming from the container and thus receiving this product prior to its distribution to the outside. This chamber houses a piston that can move inside said chamber in the direction of its length, this piston being biased by a spring in a so-called rest position. This chamber also communicates with a discharge chamber through an intermediate opening.
La chambre de refoulement communique vers l'extérieur de la pompe de dosage par une ouvertu re d'évacuation du produit. Cette ouverture d'évacuation est fermée en position de repos du piston par une valve d'obturation. Le volume de cette chambre est variable et son augmentation provoque l'ouverture de la valve d'obturation.  The delivery chamber communicates to the outside of the metering pump by an opening evacuate the product. This discharge opening is closed in the rest position of the piston by a shut-off valve. The volume of this chamber is variable and its increase causes the opening of the shutter valve.
La pompe de dosage selon ce document opère de la manière suivante. The metering pump according to this document operates in the following manner.
Du fait de l'action d'un moyen d'activation de la distribution de produit vers l'extérieur, du produit à distribuer est introduit dans la chambre de pression par l'ouverture d'admission de cette chambre avec le récipient. Le piston est alors déplacé de sa position de repos et ne bloque plus l'ouverture intermédiaire entre la chambre de pression et la chambre de refoulement. Due to the action of a means for activating the dispensing of product to the outside, the product to be dispensed is introduced into the pressure chamber through the inlet opening of this chamber with the container. The piston is then moved from its rest position and no longer blocks the intermediate opening between the pressure chamber and the discharge chamber.
Le produit peut donc s'écouler vers la chambre de refoulement qu'il remplit. Du fait de la pression du produit dans la chambre de refoulement, le volume de la chambre de refoulement est augmenté et la valve d'obturation n'obture plus l'ouverture d'évacuation de la pompe de dosage. Le produit peut donc s'écouler hors de ladite pompe. La baisse de pression dans la chambre de refoulement, du fait de l'évacuation d'une partie du produit hors de la pompe, replace alors la valve d'obturation en position de fermeture de l'ouverture d'évacuation de la pompe de dosage.  The product can therefore flow to the discharge chamber that it fills. Due to the pressure of the product in the discharge chamber, the volume of the discharge chamber is increased and the shut-off valve no longer closes the discharge opening of the metering pump. The product can therefore flow out of said pump. The pressure drop in the discharge chamber, due to the evacuation of a portion of the product out of the pump, then replace the shut-off valve in the closed position of the discharge opening of the dosing pump .
Il s'ensuit une baisse de pression du produit dans l'intérieur de la pompe de dosage et le ressort de rappel replace le piston en position de fermeture de l'ouverture intermédiaire et de l'ouverture d'évacuation.  This results in a pressure drop of the product in the interior of the metering pump and the return spring puts the piston in the closed position of the intermediate opening and the discharge opening.
La pompe de dosage conformément à cet état de la technique présente plusieurs inconvénients notoires.  The dosing pump according to this state of the art has several notorious disadvantages.
Le premier inconvén ient est que le ressort de rappel se trouve à l'intérieur de la chambre de pression. Il est ainsi en contact avec le produit à distribuer, ce qui peut à la fois polluer le produit à distribuer et endommager le ressort de rappel, par exemple par corrosion dudit ressort par le produit si celui- ci est une substance acide ou basique ou par encrassage dudit ressort par le produit si celui-ci est visqueux ou pâteux. The first disadvantage is that the return spring is inside the pressure chamber. It is thus in contact with the product to be dispensed, which can both pollute the product to be dispensed and damage the return spring, for example by corrosion of said spring by the product if it ci is an acidic or basic substance or fouling said spring by the product if it is viscous or pasty.
Le second inconvénient est que la communication entre chambre de pression et chambre de refoulement implique un nombre élevé d'éléments. En effet dans ce document, il est prévu un premier manchon élastique pour la tête d e p i ston d a n s l a prem ière ch ambre coopérant avec un épaulement d'étanchéité ainsi qu'un second manchon élastique pour la tête de piston dans la chambre de refoulement. Il conviendrait de simplifier cette communication en n'impliquant pas un tel nombre d'éléments.  The second drawback is that the communication between the pressure chamber and the discharge chamber involves a high number of elements. Indeed, in this document, there is provided a first elastic sleeve for the first head of the first chamber cooperating with a sealing shoulder and a second elastic sleeve for the piston head in the discharge chamber. This communication should be simplified by not involving such a large number of elements.
La publication DE 10 2008 027 598-A1 montre un distributeur de fluide dont la tête comprend une ouverture de sortie du fluide. Un ressort est logé pour rappeler en position u n piston déplacé lors de la d istribution . U n inconvénient est que le contrôle d'étanchéité d'un tel montage est en pratique difficile voire impossible si bien que des rebuts sont détectés tardivement. Un autre inconvénient est la complexité du système.  The publication DE 10 2008 027 598-A1 shows a fluid dispenser whose head comprises a fluid outlet opening. A spring is housed to recall in position a piston moved during dis tribution. A disadvantage is that the tightness control of such an assembly is in practice difficult or impossible so that scrap is detected late. Another disadvantage is the complexity of the system.
Le problème à la base de la présente invention est de résoudre tout ou partie des inconvénients des techniques actuelles.  The problem underlying the present invention is to solve all or part of the disadvantages of current techniques.
Pour atteindre cet objectif, il est prévu selon l'invention une pompe de dosage et de distribution d'un produit liquide ou visqueux destinée à être associée à un récipient contenant ledit produit, ladite pompe présentant, à une extrémité longitudinale dite inférieure, une ouverture d'entrée pour le passage du produit en provenance du récipient et, à une extrémité longitudinale dite supérieure, une ouverture de sortie pour la distribution du produit hors de la pompe, ladite pompe présentant en son intérieur une chambre principale recevant un piston muni d'un corps et d'une tête, ledit piston étant mobile dans la longueur de la chambre principale,  To achieve this objective, it is provided according to the invention a metering pump and dispensing a liquid or viscous product intended to be associated with a container containing said product, said pump having, at a so-called lower longitudinal end, an opening inlet for the passage of the product from the container and, at a so-called upper longitudinal end, an outlet opening for dispensing the product out of the pump, said pump having in its interior a main chamber receiving a piston provided with a body and a head, said piston being movable in the length of the main chamber,
- ledit corps présentant une canalisation interne le traversant dans le sens de sa longueur et reliée à l'ouverture d'entrée à sa partie inférieure pour l'écoulement du produit provenant de ladite ouverture d'entrée,  said body having an internal pipe passing therethrough in the direction of its length and connected to the inlet opening at its lower part for the flow of the product coming from said inlet opening,
- ledit corps et la partie inférieure de ladite tête de piston occupant la chambre principale en ne laissant vide qu'une chambre de séparation, disposée autour du corps de piston, - ladite tête de piston séparant entièrement la chambre de séparation d'une chambre de refoulement disposée à proximité de l'ouverture de sortie, la partie supérieure de ladite tête présentant en sa partie médiane supérieure un moyen d'obturation de ladite ouverture de sortie, la canalisation interne à son extrémité supérieure débouchant indirectement dans la chambre de refoulement pour l'écoulement du produit dans ladite chambre, ladite chambre de refoulement présentant un volume variable selon le mouvement du piston dans la chambre principale, said body and the lower part of said piston head occupying the main chamber leaving only a separation chamber, arranged around the piston body, said piston head completely separating the separation chamber from a discharge chamber disposed close to the outlet opening, the upper part of said head having in its upper middle part means for closing said outlet opening, the internal pipe at its upper end opening indirectly in the discharge chamber for the flow of the product in said chamber, said discharge chamber having a variable volume according to the movement of the piston in the main chamber,
- des moyens de rappel étant prévus pour agir sur le piston en plaçant le moyen d'obturation en position de fermeture de ladite ouverture de sortie, caractérisée en ce que la chambre de séparation est étanche par rapport à l'écoulement du produit en n'étant pas traversée par celui-ci. Suivant une possibilité, lesdits moyens de rappel sont logés dans cette chambre de séparation.  - return means being provided for acting on the piston by placing the closure means in the closed position of said outlet opening, characterized in that the separation chamber is sealed with respect to the flow of the product in n ' not being crossed by it. According to one possibility, said return means are housed in this separation chamber.
Un effet technique ainsi obtenu est une protection des moyens de rappel logés dans une chambre étanche au produit à distribuer contre un éventuel endommagement par ledit produit, par exemple par un encrassage ou une corrosion de ces moyens du fait d'un dépôt de produit sur ces moyens ou d'un contact prolongé de ces moyens avec le produit. Ceci permet un fonctionnement plus sûr de l'ensemble de la pompe ainsi qu'une durée de vie augmentée des divers éléments de cette pompe.  A technical effect thus obtained is a protection of the return means housed in a sealed chamber to the product to be dispensed against any damage by said product, for example by fouling or corrosion of these means due to a deposit of product on these products. means or prolonged contact of these means with the product. This allows safer operation of the entire pump as well as an increased life of the various elements of this pump.
Avantageusement, la paroi périphérique de la pompe comporte un orifice qui sert d'embouchure de contrôle d'éventuels défauts d'étanchéité. En effet, ce type de pompe est normalement difficile à contrôler et l'orifice solutionne ce problème, tel que décrit plus loin.  Advantageously, the peripheral wall of the pump comprises an orifice which serves as a mouthpiece for checking any leaks. Indeed, this type of pump is normally difficult to control and the orifice solves this problem, as described below.
Suivant une autre possibilité, le récipient présente un réservoir avantageusement collapsable de produit, et une coque externe déformable par pression sur cette coque exerçant une pression à l'extérieur du réservoir et initiant l'écoulement du produit vers la pompe.  According to another possibility, the container has an advantageously collapsable reservoir of product, and an outer shell deformable by pressure on the shell exerting pressure outside the tank and initiating the flow of the product to the pump.
Suivant un mode de réalisation préféré, la chambre étanche a aussi vocation à servir lors de phases de test d'étanchéité du dispositif. En effet, en injectant un gaz de contrôle (tel de l'air) dans la chambre, il est possible de détecter d'éventuels pertes d'étanchéité, au niveau de l'assemblage entre le piston et les composants qui l'entourent dont le pointeau et les zones en contact avec le piston sur sa périphérie. According to a preferred embodiment, the sealed chamber is also intended to be used during phases of leak testing of the device. Indeed, by injecting a control gas (such as air) into the chamber, it is possible to detect possible leaks, at the level of the assembly between the piston and surrounding components including the needle and the areas in contact with the piston on its periphery.
En particulier, l'invention peut comporter un trou, accessible depuis l'extérieur, pour coopérer soit avec des moyens d'injection d'un fluide de contrôle au travers du trou, soit avec des moyens de détection de fuites (un capteur de pression par exemple) lors de l'injection de fluides à d'autres endroits du dispositif).  In particular, the invention may comprise a hole, accessible from the outside, to cooperate either with means for injecting a control fluid through the hole, or with leak detection means (a pressure sensor for example) when injecting fluids at other locations of the device).
Le dispositif selon l'invention pourra en outre présenter facultativement au moins l'une quelconque des caractéristiques suivantes :  The device according to the invention may furthermore optionally have at least any of the following characteristics:
- le moyen d'obturation est l'extrémité supérieure d'un pointeau s'étendant entre l'extrémité supérieure de la canalisation interne et l'ouverture de sortie de la pompe,  the closure means is the upper end of a needle extending between the upper end of the internal pipe and the outlet opening of the pump,
- le pointeau présente une tige et une extrémité supérieure de forme arrondie ou en pointe,  the needle has a stem and an upper end of rounded or pointed form,
- une portion de la tige est entourée d'une collerette intérieure, la portion restante de la tige et l'extrémité supérieure du pointeau dépassant vers le haut de ladite collerette intérieure, ladite collerette intérieure étant entourée d'une collerette extérieure en laissant un espace entre elles, le pointeau et lesdites collerettes formant la tête de piston,  - A portion of the rod is surrounded by an inner collar, the remaining portion of the rod and the upper end of the needle projecting upwardly from said inner collar, said inner collar being surrounded by an outer collar leaving a space between them, the needle and said flanges forming the piston head,
- l'espace entre lesdites collerettes diminue en direction du corps du piston,  the space between said collars decreases in the direction of the piston body,
- le pointeau présente un passage pour le produit en provenance de la canalisation interne en étant raccordé à sa partie inférieure à ladite canalisation interne et au moins une ouverture de remplissage débouchant dans la chambre de refoulement pour l 'écoulement d ud it produit dans la chambre de refoulement,  - The needle has a passage for the product from the inner pipe being connected at its lower part to said inner pipe and at least one filling opening opening in the discharge chamber for the flow dd it produced in the chamber of repression,
- le passage est réalisé par une rainure longitudinale partant de la partie inférieure du pointeau en vis-à-vis de la canalisation interne et communiquant de manière étanche avec ladite canalisation, au moins une partie de la rainure formant une fente sur la périphérie du pointeau, cette fente faisant office d'ouverture de remplissage, - la rainure longitudinale s'étend sur toute la largeur du pointeau, deux parties de la rainure formant chacune une fente sur la périphérie du pointeau, lesdites fentes étant disposées de manière opposée sur ladite périphérie, - The passage is formed by a longitudinal groove from the lower part of the needle vis-à-vis the inner pipe and sealingly communicating with said pipe, at least a portion of the groove forming a slot on the periphery of the needle , this slot serving as filling opening, the longitudinal groove extends over the entire width of the needle, two parts of the groove each forming a slot on the periphery of the needle, said slots being arranged in an opposite manner on said periphery,
- les moyens de rappel sont au moins en partie logés dans la chambre de séparation,  the return means are at least partly housed in the separation chamber,
- les moyens de rappel comprennent un ressort hélicoïdal ou au moins une lame flexible entourant le corps du piston sur au moins une partie de sa longueur,  the return means comprise a helical spring or at least one flexible blade surrounding the body of the piston over at least a part of its length,
- les moyens de rappel comportent un élément en matériau déformable élastiquement, de préférence en élastomère,  the return means comprise an element of elastically deformable material, preferably of elastomer,
- l'élément en matériau déformable élastiquement est un corps cylindrique creux entourant le corps du piston,  the element of elastically deformable material is a hollow cylindrical body surrounding the body of the piston,
- les moyens de rappel sont intégralement logés dans la chambre de séparation,  the return means are fully housed in the separation chamber,
- les moyens de rappel comportent au moins un pan flexible formé sur le corps,  the return means comprise at least one flexible section formed on the body,
- au moins un pan flexible est une portion du corps ayant une forme tronconique,  at least one flexible flange is a portion of the body having a frustoconical shape,
- le au moins un pan flexible est raccordé au reste du corps par des zones d'articulation,  the at least one flexible section is connected to the rest of the body by articulation zones,
- les zones d'articulation comportent une épaisseur réduite relativement à celle du pan flexible,  the articulation zones have a reduced thickness relative to that of the flexible section,
- il comprend plusieurs pans flexibles, - it includes several flexible sections,
- au moins deux pans flexibles sont configurés de sorte à former un soufflet,  at least two flexible faces are configured so as to form a bellows,
- le corps et la tête sont deux pièces distinctes emmanchées.  - The body and the head are two separate pieces fitted.
- l'ouverture de sortie de la pompe est dans le prolongement de son ouverture d'entrée ou forme un angle avantageusement d'environ 90° avec celle-ci,  the outlet opening of the pump is in the extension of its inlet opening or forms an angle advantageously of approximately 90 ° with it,
- le corps du piston comprend une base vers son extrémité libre opposée à la tête, la base coopérant en ajustement glissant étanche avec une chemise de guidage, - la base comporte un profil extérieur s'évasant vers l'extrémité libre du corps, the body of the piston comprises a base towards its free end opposite to the head, the base cooperating in sliding fit with a guide jacket, the base comprises an external profile flaring towards the free end of the body,
- le profil extérieur est bombé de sorte à réaliser une convexité,  the external profile is curved so as to achieve a convexity,
- la base comporte un profil intérieur s'évasant vers l'extrémité libre du corps,  the base comprises an internal profile flaring towards the free end of the body,
- l'épaisseur de la base est décroissante en direction de l'extrémité libre du corps,  the thickness of the base is decreasing in the direction of the free end of the body,
- le profil intérieur est incurvé de sorte à réaliser une concavité,  the inner profile is curved so as to achieve a concavity,
- la chambre principale est au moins partiellement délimitée par une paroi périphérique qui présente au moins un orifice débouchant d'une part dans la chambre principale et d'autre part à l'extérieur de la pompe.  - The main chamber is at least partially defined by a peripheral wall which has at least one opening opening on the one hand in the main chamber and on the other hand outside the pump.
L'invention concerne aussi un bouchon rapportable destiné à être associé à un récipient contenant un produit liquide ou visqueux, caractérisé en ce qu'il incorpore une telle pompe de dosage et de distribution.  The invention also relates to a reportable cap to be associated with a container containing a liquid or viscous product, characterized in that it incorporates such a metering pump and dispensing.
L'invention concerne enfin un récipient contenant un produit liquide ou visqueux et présentant un élément de distribution dudit produit, caractérisé en ce qu'il comporte une telle pompe de dosage et de distribution ou un tel bouchon rapportable, la pompe ou le bouchon étant solidarisé avec ledit élément de distribution.  Finally, the invention relates to a container containing a liquid or viscous product and having a dispensing element of said product, characterized in that it comprises such a dosing pump and dispensing or such a plug reportable, the pump or cap being secured with said dispensing element.
Avantageusement, le réservoir du récipient est en matière souple, la pompe étant alimentée en produit par une ou des pressions manuelles exercées sur ledit réservoir et initiant l'écoulement du produit vers la pompe.  Advantageously, the tank of the container is of flexible material, the pump being supplied with product by one or more manual pressures exerted on said reservoir and initiating the flow of the product to the pump.
Suivant une autre possibilité, le récipient présente un réservoir avantageusement collapsable de produit et une poire raccordée à distance audit réservoir par un conduit, une ou des pressions exercées sur ladite poire étant transmises à l'extérieur du réservoir et initiant l'écoulement du produit vers la pompe.  According to another possibility, the container has an advantageously collapsable reservoir of product and a bulb remotely connected to said reservoir by a conduit, one or more pressures exerted on said bulb being transmitted to the outside of the reservoir and initiating the flow of the product towards the pump.
Avantageusement, la distribution du produit hors du récipient se fait par pulvérisation, projection ou écoulement.  Advantageously, the distribution of the product out of the container is by spraying, projection or flow.
Un procédé de contrôle est un autre aspect de l'invention, procédé comprenant les étapes suivantes :  A control method is another aspect of the invention, the method comprising the following steps:
- utilisation d'une pompe, - admission d'un fluide de contrôle dans la chambre principale au travers de l'orifice, - use of a pump, - admission of a control fluid into the main chamber through the orifice,
- détection d'un niveau de perte d'étanchéité dans la chambre principale au moyen du fluide de contrôle.  - Detection of a level of leakage in the main chamber by means of the control fluid.
Le procédé de contrôle peut aussi être tel qu'il comprend les étapes suivantes : The control method may also be such that it comprises the following steps:
- utilisation d'une pompe;  - use of a pump;
- admission d'un fluide de contrôle par l'ouverture d'entrée ou par l'ouverture de sortie;  - admission of a control fluid through the inlet opening or through the outlet opening;
- détection de fuite du fluide de contrôle au niveau de l'orifice.  - leak detection of the control fluid at the orifice.
D'autres caractéristiques, buts et avantages de la présente invention apparaîtront à la lecture de la description détaillée qui va suivre et au regard des dessins annexés donnés à titre d'exemple non limitatif et sur lesquels : Other features, objects and advantages of the present invention will appear on reading the detailed description which follows and with reference to the appended drawings given by way of non-limiting example and in which:
- la figure 1 est une représentation schématique d'une coupe longitudinale d'un élément de distribution d'un récipient muni d'une pompe de dosage et de distribution selon la présente invention,  FIG. 1 is a diagrammatic representation of a longitudinal section of a dispensing element of a container provided with a metering and dispensing pump according to the present invention,
- la figure 2 est une représentation schématique d'une vue en perspective d'une moitié de piston coupé longitudinalement avec un pointeau faisant partie d'un mode de réalisation de la pompe de dosage et de distribution selon la présente invention,  FIG. 2 is a schematic representation of a perspective view of a piston half cut longitudinally with a punch forming part of an embodiment of the metering and dispensing pump according to the present invention,
- la figure 3 est une représentation schématique d'une vue en perspective d'un piston avec un pointeau faisant partie du même mode de réalisation de la pompe de dosage et de distribution selon la présente invention que celui de la figure 2,  FIG. 3 is a diagrammatic representation of a perspective view of a piston with a pin belonging to the same embodiment of the metering and dispensing pump according to the present invention as that of FIG. 2,
- la figure 4 est une représentation schématique d'une coupe selon l'axe FIG. 4 is a schematic representation of a section along the axis
A-A montré à la figure 3 d'un piston avec un pointeau faisant partie du même mode de réalisation de la pompe de dosage et de distribution selon la présente invention que celui de la figure 2, ceci transversalement aux ouvertures aménagées dans le pointeau, FIG. 3 shows a piston with a needle belonging to the same embodiment of the dosing and dispensing pump according to the present invention as that of FIG. 2, transversely to the openings in the needle,
- la figure 5 est une représentation schématique d'une coupe selon l'axe FIG. 5 is a schematic representation of a section along the axis
B-B montré à la figure 4 d'un piston avec un pointeau faisant partie du même mode de réalisation de la pompe de dosage et de distribution selon la présente invention que celui de la figure 2, - la figure 6 est une représentation schématique d'une coupe longitudinale d'un élément de distribution d'un récipient selon un autre mode de réalisation que la figure 1 , ledit récipient étant muni d'une pompe de dosage et de distribution selon la présente invention, BB shown in FIG. 4 of a piston with a needle belonging to the same embodiment of the dosing and dispensing pump according to the present invention as that of FIG. 2, FIG. 6 is a diagrammatic representation of a longitudinal section of a distribution element of a container according to another embodiment of FIG. 1, said container being provided with a metering and dispensing pump according to the present invention; invention,
- la figure 7 montre une variante de l'invention,  FIG. 7 shows a variant of the invention,
- la figure 8 montre une autre possibilité d'exécution des moyens de rappel,  FIG. 8 shows another possibility of execution of the return means,
- la figure 9 présente une autre possibilité de moyens de rappel.  - Figure 9 shows another possibility of return means.
La présente invention concerne une pom pe 1 de dosage et de distribution d'un produit liquide ou visqueux destinée à être associée à l'élément de distribution 3 d'un récipient 2 contenant ledit produit. Par distribution il est entendu toute forme d'application du produit, par exemple pulvérisation, projection ou écoulement.  The present invention relates to a pump 1 for dosing and dispensing a liquid or viscous product intended to be associated with the dispensing element 3 of a container 2 containing said product. By dispensing is meant any form of application of the product, for example spraying, spraying or flowing.
Avantageusement, la pompe 1 de dosage et de distribution est intégralement formée dans un bouchon 4 rapportable sur tout type de récipients 2, principalement des tubes souples. A la figure 1 , ce bouchon 4 est vissé par un filetage 8 sur un élément de distribution 3 qui coiffe ledit récipient 2.  Advantageously, the dosing and dispensing pump 1 is integrally formed in a plug 4 which can be attached to any type of receptacle 2, mainly flexible tubes. In FIG. 1, this plug 4 is screwed by a thread 8 on a dispensing element 3 which caps said container 2.
Dans ce qui suit, le récipient 2 va être décrit avec la pompe 1 de dosage et de distribution disposée à sa partie supérieure. Cette position est la position classique de fonctionnement de la pompe 1 mais celle-ci peut fonctionner quand son axe longitudinal présente une inclinaison par rapport à la verticale. Pour un élément donné de la pompe 1 , haut et bas feront référence à ce qui est respectivement opposé ou tourné vers le récipient 2. Il en ira de même pour parties supérieure et inférieure, les parties supérieures se trouvant plus à proximité de l'ouverture de sortie de la pompe que les parties inférieures et inversement en ce qui concerne leur proximité au récipient 2.  In what follows, the container 2 will be described with the pump 1 dosing and dispensing disposed at its upper part. This position is the conventional operating position of the pump 1 but it can operate when its longitudinal axis has an inclination relative to the vertical. For a given element of the pump 1, up and down will refer to what is opposite or turned towards the container 2. The same will apply to the upper and lower parts, the upper parts being closer to the opening of the pump outlet as the lower parts and conversely with regard to their proximity to the container 2.
La pompe 1 de dosage reçoit le produit en provenance du récipient 2 par une ouverture d'entrée 18 et distribue le produit vers l'extérieur de la pompe par une ouverture de sortie 7. Cette ouverture de sortie 7, dans les deux formes de réalisation montrées aux figures 1 et 6, forme l'ouverture de distribution du récipient 2.  The dosing pump 1 receives the product from the container 2 through an inlet opening 18 and distributes the product to the outside of the pump through an outlet opening 7. This outlet opening 7, in both embodiments shown in Figures 1 and 6, forms the dispensing opening of the container 2.
La pompe 1 de dosage et de distribution présente aussi en son intérieur une première chambre dénommée chambre principale 9. Cette chambre principale 9 reçoit un piston 10. Ce piston 10 est creux en son intérieur en présentant une canalisation interne 1 1 servant au passage du produit liquide ou visqueux à doser et à distribuer. La canalisation interne 1 1 traverse au moins partiellement le piston 10 dans sa longueur. Cette canalisation interne 1 1 peut aussi être dénommée chambre de compression du produit à distribuer et peut présenter un élément en forme de réservoir qui peut ainsi servir de réservoir de produit à distribuer mais ce n'est pas obligatoire. The dosing pump 1 and distribution also has in its interior a first room called master bedroom 9. This room main 9 receives a piston 10. This piston 10 is hollow in its interior by having an internal pipe 1 1 for the passage of the liquid or viscous product to be metered and dispensed. The internal pipe 1 1 at least partially through the piston 10 in its length. This internal pipe 1 1 may also be called the compression chamber of the product to be dispensed and may have a tank-shaped element that can serve as a product reservoir to be dispensed but it is not mandatory.
Le piston 10 présente un corps 10a s'étendant dans la longueur de la chambre principale 9 et une tête 10b à son extrémité la plus éloignée du récipient 2.  The piston 10 has a body 10a extending in the length of the main chamber 9 and a head 10b at its end farthest from the container 2.
Le corps 10a du piston 10 comprend en son intérieur la canalisation interne 1 1 et délimite cette canalisation interne 1 1 de la chambre principale 9, ceci de manière étanche en ne permettant pas au produit de pénétrer dans la partie restante de la chambre principale 9 non occupée par le piston. Cette partie restante de la chambre principale 9, référencée 9a à la figure 1 et disposée entre corps 10a du piston 10 et partie inférieure de la tête 10b de piston 10, sera ci-après appelée chambre de séparation.  The body 10a of the piston 10 comprises inside the inner pipe 1 1 and defines the inner pipe 1 1 of the main chamber 9, this sealingly by not allowing the product to enter the remaining part of the main chamber 9 no occupied by the piston. This remaining portion of the main chamber 9, referenced 9a in Figure 1 and disposed between the body 10a of the piston 10 and the lower part of the piston head 10b 10, will hereinafter called the separation chamber.
Dans cette chambre de séparation 9a qui est étanche sont logés, dans un mode de réalisation, des moyens de rappel 16 du piston 10, rappelant celui- ci dans une position dans laquelle sa tête 10b est en position la plus éloignée du récipient 2, cette position étant désignée par position haute, ceci en vue de l'obturation de l'ouverture d'évacuation 7 de la pompe 1 , comme il sera décrit ultérieurement. Ces moyens de rappel 16 comprennent avantageusement un ressort de rappel 16 entourant au moins partiellement le corps 10a du piston, ce ressort étant avantageusement un ressort hélicoïdal enroulé autour du corps 10a. Il peut aussi s'agir d'éléments flexibles autres, tels au moins une lame flexible, par exemple en matière plastique.  In this separation chamber 9a, which is sealed, are housed, in one embodiment, return means 16 of the piston 10, recalling the latter in a position in which its head 10b is in the farthest position of the container 2, this position being designated by high position, this for the closure of the discharge opening 7 of the pump 1, as will be described later. These return means 16 advantageously comprise a return spring 16 at least partially surrounding the body 10a of the piston, this spring being advantageously a helical spring wound around the body 10a. It may also be other flexible elements, such as at least one flexible blade, for example plastic.
Le corps 10a du piston, entièrement traversé dans le sens de sa longueur par la canalisation interne 1 1 , coopère par son extrémité inférieure, c'est-à-dire son extrémité la plus proche du récipient 2, directement avec l'ouverture d'entrée 18 de la pompe 1 pour l'écoulement du produit dans ladite pompe 1 en provenance de l'élément de distribution 3 du récipient 2 de sorte que tout le produit sortant de cet élément de distribution 3 passe directement par la canalisation interne 1 1 du piston 10. The body 10a of the piston, completely traversed in the direction of its length by the internal pipe 1 1, cooperates with its lower end, that is to say its end closest to the container 2, directly with the opening of input 18 of the pump 1 for the flow of the product in said pump 1 from the dispensing element 3 of the container 2 so that all the product leaving this distribution element 3 passes directly through the internal pipe 1 1 of the piston 10.
Au niveau de l'ouverture d'entrée 18, l'extrémité du corps 10a est avantageusement guidée en translation par une surface servant de chemise de guidage 20 pour la base 21 du piston 10a. La chemise de guidage est préférentiellement cylindrique et peut être formée dans le bouchon 4, avantageusement intégralement avec ce dernier. Un contact cylindre sur cylindre est , dans le mode de réalisation illustré notamment à la figure 1 , produit entre la chemise de guidage 20 et la base 21 du piston, et assure l'étanchéité au niveau de l'ouverture d'entrée 18.  At the inlet opening 18, the end of the body 10a is advantageously guided in translation by a surface serving as a guide liner 20 for the base 21 of the piston 10a. The guide liner is preferably cylindrical and may be formed in the cap 4, advantageously integrally with the latter. A cylinder-to-cylinder contact is, in the embodiment illustrated in particular in FIG. 1, produced between the guide liner 20 and the base 21 of the piston, and seals at the level of the inlet opening 18.
Dans la variante présentée en figure 6, la base 21 a un profil évasé s'élargissant vers l'extrémité du corps 10a du piston 10. Préférentiellement, ce profil évasé est curviligne de sorte à former un bombé sur la face interne et/ou la face externe.  In the variant shown in FIG. 6, the base 21 has a flared profile widening towards the end of the body 10a of the piston 10. Preferably, this flared profile is curvilinear so as to form a bulge on the internal face and / or the external face.
De plus, la forme évasée présente préférentiellement une diminution d'épaisseur en direction de l'extrémité du corps 10a de sorte à augmenter sa déformabilité à ce niveau.  In addition, the flared shape preferably has a decrease in thickness towards the end of the body 10a so as to increase its deformability at this level.
Le profil évasé permet de limiter les frottements entre la chemise 20 et la base 21 en diminuant la surface de contact. Dans le cas d'une progressivité de section, on ajoute une propension naturelle du produit à délivrer à passer par la canalisation interne 1 1 .  The flared profile makes it possible to limit the friction between the jacket 20 and the base 21 by reducing the contact surface. In the case of progressivity of section, a natural propensity of the product to be delivered is added to pass through the internal pipe 11.
Dans le cas du profil évasé interne, réalisable en complément ou alternativement au profil évasé externe, il permet d'orienter radialement une partie de la pression exercée par le produit à distribuer si bien que, dans une gamme prédéterminée de pression de produit, on augmente l'appui de la base 21 sur la chemise 20, accroissant l'étanchéité.  In the case of the internal flared profile, feasible in addition or alternatively to the external flared profile, it makes it possible to orient a portion of the pressure exerted by the product to be radially distributed so that, in a predetermined range of product pressure, it increases the support of the base 21 on the sleeve 20, increasing the seal.
La partie supérieure de la tête 10b du piston 10 réalise une délimitation entre chambre de séparation 9a et une troisième chambre, dénommée ci-après chambre de refoulement 5. La tête 10b est disposée de manière à présenter la canalisation interne 1 1 sous sa partie inférieure et la chambre de refoulement 5 au dessus d'une grande partie de sa surface supérieure à l'exception de la portion médiane de cette surface supérieure formant un support portant le moyen d'obturation 12a pointant vers l'ouverture de sortie 7 de la pompe 1 . Cette chambre de refoulement 5 présente un volume variable comme il sera vu par la suite de même que vont être détaillées les caractéristiques du moyen d'obturation 12a et de son support. The upper part of the head 10b of the piston 10 delimits a separating chamber 9a and a third chamber, hereinafter referred to as the delivery chamber 5. The head 10b is arranged so as to have the internal pipe 11 under its lower part. and the discharge chamber 5 over a large part of its upper surface with the exception of the middle portion of this upper surface forming a support carrying the closure means 12a pointing to the outlet opening 7 of the pump 1. This discharge chamber 5 has a variable volume as will be seen later as will be detailed the characteristics of the closure means 12a and its support.
Les figures 2 à 5 qui montrent des agrandissements en coupe et/ou en perspective du piston 10 montré à la figure 1 permettent de mieux distinguer les divers éléments formant ce piston 10.  FIGS. 2 to 5, which show enlargements in section and / or in perspective of the piston 10 shown in FIG. 1, make it possible to better distinguish the various elements forming this piston 10.
A ces figures, le moyen d'obturation 12a porté par la tête 10b du piston, c'est-à-dire son extrémité supérieure opposée au récipient, est formé de l'extrémité supérieure ou extrémité distale d'un pointeau 12 s'étendant dans la longueur du piston 10, en partant de la face inférieure de la tête 10b du piston et en faisant saillie de la face supérieure de ladite tête 10b en étant orienté vers l'ouverture de sortie de la pompe. Le pointeau 12 forme ainsi le moyen d'obturation 12a ainsi que son support.  In these figures, the closure means 12a carried by the head 10b of the piston, that is to say the upper end opposite the container, is formed of the upper end or distal end of a needle 12 extending in the length of the piston 10, starting from the underside of the piston head 10b and projecting from the upper face of said head 10b towards the outlet opening of the pump. The needle 12 thus forms the sealing means 12a and its support.
Ce pointeau 12 est donc formé d'une extrémité supérieure 12a, faisant office de moyen d'obturation de l'ouverture de sortie et d'une tige 12b reçue au moins partiellement dans le piston 10, aux figures 2 à 5 sa partie inférieure et une portion de sa partie médiane. Cette extrémité supérieure 12a du pointeau 12 peut présenter une forme arrondie ou en pointe. Une forme arrondie ou en pointe garantit une meilleure étanchéité entre l'extrémité supérieure 12a du pointeau 12 et l'ouverture de sortie du produit hors de la pompe. La tige 12b du pointeau 12 peut être de forme cylindrique.  This needle 12 is therefore formed of an upper end 12a, serving as closing means of the outlet opening and a rod 12b received at least partially in the piston 10, in Figures 2 to 5 its lower part and a portion of its middle part. This upper end 12a of the needle 12 may have a rounded or pointed shape. A rounded or pointed shape ensures a better seal between the upper end 12a of the needle 12 and the outlet opening of the product out of the pump. The rod 12b of the needle 12 may be of cylindrical shape.
Comme il est particulièrement visible à la figure 2, laquelle montre une coupe longitudinale du pointeau 12, ce pointeau 12 présente une rainure longitudinale 6 sur une majeure portion de sa partie médiane et sur sa partie inférieure, cette rainure 6 le traversant entièrement dans le sens de sa largeur à cette figure, mais ceci n'est pas obligatoire.  As is particularly visible in Figure 2, which shows a longitudinal section of the needle 12, the needle 12 has a longitudinal groove 6 on a major portion of its middle part and on its lower part, this groove 6 passing through it entirely in the direction of its width to this figure, but this is not obligatory.
Cette rainure longitudinale 6 débouche à sa partie inférieure au dessus de la canalisation interne 1 1 du piston 10 et permet ainsi l'écoulement du produit contenu dans cette canalisation 1 1 à travers la portion du pointeau 12 dans laquelle elle s'étend. La rainure longitudinale 6 communique de manière étanche avec ladite canalisation interne 1 1 .  This longitudinal groove 6 opens at its lower part above the internal pipe 1 1 of the piston 10 and thus allows the flow of the product contained in this pipe 1 1 through the portion of the needle 12 in which it extends. The longitudinal groove 6 communicates in a sealed manner with said internal pipe 1 January.
De cette manière, la canalisation interne 1 1 débouche indirectement dans la chambre de refoulement pour permettre l'écoulement du produit dans ladite chambre, étant donné que c'est la rainure 6 intérieure au pointeau 12 qui forme le passage d'écoulement du produit en étant reliée à l'extrémité supérieure de la canalisation interne 1 1 et en débouchant dans la chambre de refoulement. In this way, the internal pipe 1 1 opens indirectly into the discharge chamber to allow the flow of the product in said chamber, since it is the groove 6 inside the needle 12 which forms the flow passage of the product being connected to the upper end of the inner pipe 1 1 and opening into the discharge chamber.
Comme il est visible à la figure 3, cette rainure longitudinale, non référencée à cette figure, sort partiellement du piston 10 quand le pointeau 12 est disposé dans et sur la tête 10b de piston 10 pour en former la partie supérieure. Ceci procure au moins une fente 6a formée par une partie de cette rainure, cette fente 6a faisant office d'ouverture de remplissage afin de servir à l'écoulement du produit en provenance de la canalisation interne dans la chambre de refoulement qui avait été référencée 5 à la figure 1 . Cette chambre de refoulement est ainsi mise en communication avec le récipient pour l'écoulement dans cette chambre du produit à doser et à distribuer.  As can be seen in FIG. 3, this longitudinal groove, not referenced in this figure, partially leaves the piston 10 when the needle 12 is disposed in and on the piston head 10b to form the upper part thereof. This provides at least one slot 6a formed by a portion of this groove, this slot 6a acting as a filling opening to serve for the flow of the product from the internal pipe into the discharge chamber which had been referenced 5 in Figure 1. This delivery chamber is thus placed in communication with the container for the flow in this chamber of the product to be assayed and dispensed.
Quand la rainure longitudinale traverse le pointeau 12 sur toute sa largueur, elle crée avantageusement deux fentes formant deux ouvertures diamétralement opposées. Alternativement, il est aussi possible que la rainure longitudinale soit conçue pour qu'une seule fente 6a ne débouche que d'un côté du pointeau 12.  When the longitudinal groove passes through the needle 12 over all its width, it advantageously creates two slots forming two diametrically opposite openings. Alternatively, it is also possible that the longitudinal groove is designed so that a single slot 6a opens only on one side of the needle 12.
En se référant aux figures 2 à 5, la tête 10b du piston est composée d'une collerette extérieure 13 faisant saillie latéralement du corps 10a du piston en s'évasant vers le haut. La tête 10b du piston comprend aussi une collerette intérieure 14 entourant la partie inférieure et au moins partiellement la partie médiane du pointeau 12. La tête 10b du piston se compose donc du pointeau 12 et des collerettes 13 et 14.  Referring to Figures 2 to 5, the piston head 10b is composed of an outer flange 13 projecting laterally from the body 10a of the piston flaring upwards. The piston head 10b also comprises an inner flange 14 surrounding the lower part and at least partially the middle part of the needle 12. The piston head 10b therefore consists of the needle 12 and the flanges 13 and 14.
La collerette extérieure 13 et la collerette intérieure 14 déterminent entre elles un espace 15. Cet espace 15 décroît à mesure qu'il se rapproche du corps 10a du piston 10. Cet espace 15 fait partie de la chambre de refoulement et sert avantageusement de réservoir de produit quand celui-ci est contenu dans la chambre de refoulement.  The outer flange 13 and the inner flange 14 define a space 15 between them. This space 15 decreases as it approaches the body 10a of the piston 10. This space 15 is part of the discharge chamber and advantageously serves as a storage tank. produced when it is contained in the delivery chamber.
Comme montré à la figure 1 , l'extrémité supérieure 12a du pointeau 12 sert d'élément d'obturation, cette extrémité supérieure 12a pouvant obturer l'ouverture de sortie 7 de la chambre de refoulement 5, empêchant ainsi le produit contenu dans la chambre de refoulement 5 de quitter celle-ci pour être distribué vers l'extérieur de la pompe de dosage 1 et en conséquence du récipient 2. As shown in FIG. 1, the upper end 12a of the needle 12 serves as a closure element, this upper end 12a being able to close off the outlet opening 7 of the delivery chamber 5, thus preventing the product contained in the chamber of repression 5 to leave this one to be dispensed to the outside of the metering pump 1 and accordingly to the container 2.
La figure 6 montre un autre mode de réalisation de la disposition d'une pompe de dosage et de distribution selon la présente invention sur un récipient de produit liquide ou visqueux à distribuer.  FIG. 6 shows another embodiment of the arrangement of a metering and dispensing pump according to the present invention on a liquid or viscous product container to be dispensed.
Dans cette forme de réalisation, le bouchon 4a du récipient incorpore la pompe de dosage et de distribution 1 toujours vers sa partie supérieure mais perpendiculairement à une conduite 17 d'amenée du produit contenu dans le réservoir non illustré à cette figure. Cette conduite 17 débouche sur la canalisation interne 1 1 de la pompe 1 . La conduite 17 et la canalisation interne 1 1 forment alors entre elles un angle, à la figure 6 un angle droit, dans le bouchon 4a du récipient. L'ouverture de sortie 7 du produit se trouve alors positionnée latéralement au bouchon 4a et non pas au dessus de celui-ci comme cela était le cas à la figure 1 .  In this embodiment, the cap 4a of the container incorporates the dosing and dispensing pump 1 always towards its upper part but perpendicularly to a conduit 17 for feeding the product contained in the tank not shown in this figure. This pipe 17 opens on the internal pipe 1 1 of the pump 1. The pipe 17 and the inner pipe 1 1 then form between them an angle, in Figure 6 a right angle, in the cap 4a of the container. The outlet opening 7 of the product is then positioned laterally to the plug 4a and not above it as was the case in FIG.
Sinon, le fonctionnement de la pompe 1 est le même et celle-ci présente les mêmes éléments constitutifs que ceux mentionnés dans la première forme de réalisation montrée à la figure 1 , notamment avec la présence du pointeau 12 et de son extrémité supérieure 12a servant d'élément d'obturation à l'ouverture de sortie 7 du produit.  Otherwise, the operation of the pump 1 is the same and it has the same constituent elements as those mentioned in the first embodiment shown in Figure 1, in particular with the presence of the needle 12 and its upper end 12a serving as shutter element at the outlet opening 7 of the product.
On notera malgré tout, en référence à une partie précédente de la description, que la forme du corps 10a du piston est modifiée dans le cas de la figure 6.  Note nevertheless, with reference to a previous part of the description, that the shape of the body 10a of the piston is modified in the case of Figure 6.
Cette figure montre en outre une caractéristique optionnelle avantageuse pour la vérification de l'étanchéité de l'assemblage. Plus particulièrement, dans cette réalisation, un orifice 22 est formé au travers de la paroi périphérique 24 délimitant la chambre principale 9. La paroi périphérique 24 est par ailleurs, dans le cas de l'illustration, encastrée dans un siège 23 par exemple intégral avec le reste du bouchon 4, de sorte à préserver un passage d'air entre l'extérieur et l'orifice 22. Plusieurs orifices 22 peuvent être prévus. Leur placement peut également différer de l'exemple illustré.  This figure also shows an advantageous optional feature for checking the tightness of the assembly. More particularly, in this embodiment, an orifice 22 is formed through the peripheral wall 24 delimiting the main chamber 9. The peripheral wall 24 is also, in the case of the illustration, embedded in a seat 23, for example integral with the remainder of the plug 4, so as to preserve an air passage between the outside and the orifice 22. Several orifices 22 may be provided. Their placement may also differ from the example shown.
Les figures 7 à 9 montrent trois autres variantes de réalisation de l'invention. Plus précisément, ces figures illustrent des possibilités alternatives ou complémentaires de réalisation des moyens de rappel. Dans le cas de l'exemple de la figure 7, les moyens de rappel 16 sont comme dans les cas précédents logés dans le volume de la chambre 9a. Par contre, ils sont ici réalisés sous forme d'un élément dont le matériau est déformable élastiquement. A titre préféré, un élastomère est utilisé pour former le moyen de rappel 16 dans ce cas. Dans l'illustration, les moyens de rappel 16 sont sous forme d'un élément cylindrique, de section circulaire, s'étendant entre la chemise de guidage 20 par rapport à laquelle le corps du piston 10 est monté glissant et, à l'autre extrémité, une extrémité d'appui 25 venant s'appliquer sur une portion d'application de la tête du piston. On comprend que lorsque le fluide exerce une pression dans la chambre de refoulement 5, le piston met en compression le moyen de rappel 16 sous forme de matériau élastiquement déformable. Cette mise en compression constitue un magasin d'énergie de rappel qui est utilisé au relâchement du système pour assurer le retour en position fermée du pointeau 12. D'autres formes sont possibles pour l'élément en matériau déformable élastiquement. Figures 7 to 9 show three other embodiments of the invention. More precisely, these figures illustrate alternative or complementary possibilities of making the return means. In the case of the example of Figure 7, the return means 16 are as in previous cases housed in the volume of the chamber 9a. By cons, they are here made in the form of an element whose material is elastically deformable. Preferably, an elastomer is used to form the biasing means 16 in this case. In the illustration, the return means 16 are in the form of a cylindrical element, of circular section, extending between the guide sleeve 20 with respect to which the body of the piston 10 is slidably mounted and, at the other end, a bearing end 25 being applied to an application portion of the piston head. It is understood that when the fluid exerts a pressure in the discharge chamber 5, the piston compresses the return means 16 in the form of elastically deformable material. This compression is a booster energy store that is used to release the system to ensure the return to the closed position of the needle 12. Other forms are possible for the element of elastically deformable material.
En référence à la figure 8, on a illustré une autre possibilité de réalisation des moyens de rappel. Dans ce dernier cas, ceux-ci sont constitués ou comprennent au moins un pan flexible 26. Dans le cas représenté, un pan 26 unique est réalisé et s'étend à partir d'une partie de base du piston 28 raccordée à la paroi périphérique 24 de façon étanche. Une articulation 27 constitue le point de raccordement entre la base 28 et le pan flexible 26. A son autre extrémité, le pan flexible présente également une zone d'articulation 27 relativement au reste du corps 10a du piston 10. Avantageusement, le pan flexible 26 a une forme géométrique tel qu'il comporte une composante qui n'est pas orientée suivant la direction longitudinale de l'ensemble (la direction de translation du piston 10). De la sorte, lors d'un mouvement de translation du piston 10, le pan 26 subit une sollicitation différant d'une compression et en particulier une flexion qui peut être utilisée comme élément de rappel élastique.  Referring to Figure 8, there is illustrated another embodiment of the return means. In the latter case, these consist or comprise at least one flexible panel 26. In the case shown, a single panel 26 is formed and extends from a base portion of the piston 28 connected to the peripheral wall. 24 tightly. A hinge 27 constitutes the connection point between the base 28 and the flexible panel 26. At its other end, the flexible panel also has a hinge area 27 relative to the rest of the body 10a of the piston 10. Advantageously, the flexible panel 26 has a geometric shape such that it comprises a component which is not oriented in the longitudinal direction of the assembly (the direction of translation of the piston 10). In this way, during a translational movement of the piston 10, the pan 26 undergoes a stress differing from a compression and in particular a bending that can be used as an elastic return element.
Pour faciliter la déformation en flexion du pan 26, les articulations 27 peuvent comporter un rétrécissement c'est-à-dire réaliser une variation d'épaisseur relativement à l'épaisseur du pan 26. Ce mode de réalisation ressort de la figure 8. A cette figure, on a également représenté une variante de formation du piston 10 dans laquelle le corps 10a et la tête 10b sont réalisés en deux pièces distinctes. Ces pièces sont assemblées par un système d'emmanchement maie femelle. Dans le cas illustré, c'est le corps 10a qui comporte un manchon 30 du type femelle apte à recevoir l'extrémité basse de la tête de piston 10b. D'autres configurations sont bien entendu possibles. La canalisation 1 1 du piston 10 est ainsi formée pour partie dans la pièce de corps 10a et pour une autre partie dans la pièce de tête 10b. Les portions de la canalisation 1 1 de ces deux pièces sont configurées pour réaliser une continuité et sont avantageusement de même forme et de même diamètre. To facilitate flexural deformation of the pan 26, the joints 27 may comprise a constriction, that is to say make a variation in thickness relative to the thickness of the pan 26. This embodiment is shown in Figure 8. A this figure also shows an alternative formation of the piston 10 in which the body 10a and the head 10b are made of two separate rooms. These parts are assembled by a female male fitting system. In the case illustrated, it is the body 10a which comprises a sleeve 30 of the female type adapted to receive the lower end of the piston head 10b. Other configurations are of course possible. The pipe 1 1 of the piston 10 is thus formed partly in the body part 10a and for another part in the head piece 10b. The portions of the pipe 1 1 of these two parts are configured to achieve continuity and are preferably of the same shape and the same diameter.
On comprend que cette réalisation permet notamment de différencier les matériaux utilisés pour le corps 10a et pour la tête 10b ou encore de remplacer une partie défaillante sans devoir remplacer l'autre partie.  It is understood that this embodiment makes it possible in particular to differentiate the materials used for the body 10a and for the head 10b or to replace a defective part without having to replace the other part.
La figure 9 présente une autre possibilité de réalisation des moyens de rappel. Comme dans le cas précédent, on tire profit de la mise en flexion de pan 26. Dans ce cas, une pluralité de pans 26 sont mis en œuvre et, plus particulièrement, réalisés sous forme adjacente de sorte à former des soufflets. Les pans 26 sont ici jointifs et de direction alternée autour d'articulations 27. Comme dans le cas précédent, il est avantageux de mettre en œuvre des pans qui sont des parties de la longueur du corps 1 0a de section tronconique. Le nombre de pans 26 n'est pas limité et on notera que dans le cas représenté à la figure 9, on a mis en œuvre huit pans de direction alternée de sorte à former les soufflets.  FIG. 9 shows another possible embodiment of the return means. As in the previous case, it takes advantage of the bending pan 26. In this case, a plurality of sections 26 are implemented and, more particularly, made in adjacent form so as to form bellows. The panels 26 are here contiguous and of alternating direction around joints 27. As in the previous case, it is advantageous to implement panels which are parts of the length of the body 10a of frustoconical section. The number of panels 26 is not limited and it will be noted that in the case shown in FIG. 9, eight alternating steering faces have been used so as to form the bellows.
Il est possible de combiner des moyens de rappel logés dans la chambre de séparation 9a et des moyens de rappel sous forme de pans flexibles tels que décrit précédemment. On peut ainsi combiner deux moyens de rappel de sorte à obtenir un retour en position plus efficace et/ou éviter la fatigue des moyens élastique employés.  It is possible to combine return means housed in the separation chamber 9a and return means in the form of flexible sections as described above. It is thus possible to combine two return means so as to obtain a more efficient return to position and / or avoid the fatigue of the elastic means used.
On notera que dans les modes de réalisation des figures 8 et 9, le piston 10 est directement solidarisée à la base à la paroi périphérique 24 si bien que son extrémité inférieure n'a pas à translater vis-à-vis d'une chemise de guidage 20 comme dans les modes de réalisation qui précèdent. On supprime ainsi la nécessité d'une mobilité et d'une étanchéité.  Note that in the embodiments of Figures 8 and 9, the piston 10 is directly secured to the base at the peripheral wall 24 so that its lower end does not have to translate vis-à-vis a shirt of guidance 20 as in the preceding embodiments. This eliminates the need for mobility and sealing.
Ces réalisations limitent par ailleurs l'hyperstatisme du système et permettent, grâce au pan flexible, d'opérer un auto ajustement du piston lors de sa translation de sorte à positionner le pointeau 12 de manière optimale. Un auto centrage est ainsi réalisé. These achievements also limit the hyperstatism of the system and allow, thanks to the flexible pan, to operate a self adjustment of the piston during its translation so as to position the needle 12 optimally. A self centering is thus achieved.
A titre d'exemple, on peut mettre en œuvre, pour le moins dans les modes de réalisation des figures 8 et 9, un corps 10a de piston 10 en polypropylène et/ou avantageusement, comme dans le cas des moyens de rappel élastique 16 de la figure 7, en élastomère tel que de l'EVA (éthylène vinyl acétate) ou encore du SEBS (polystyrène-b-poly(éthylène-butylène)-b- polystyrène).  By way of example, it is possible to implement, at least in the embodiments of FIGS. 8 and 9, a piston body 10a made of polypropylene and / or advantageously, as in the case of the elastic return means 16 of Figure 7, elastomer such as EVA (ethylene vinyl acetate) or SEBS (polystyrene-b-poly (ethylene-butylene) -b-polystyrene).
Lors d'une phase de test, un aspect de l'invention consiste à mettre en œuvre un procédé de contrôle de l'étanchéité au niveau du piston 10. A cet effet, un gaz à pression définie est injecté au travers de l'orifice 22. D'éventuelles pertes d'étanchéité sont détectées en cas de chute de la pression. Le contrôle a l'avantage d'être opérable sans détérioration de la pompe et sans démontage de ses constituants. Il peut par conséquent être répétitif sur de nombreuses pièces produites, voire être systématique. Dans ce mode de réalisation, la chambre de séparation 9a fait donc aussi office de volume de contrôle d'étanchéité. Eventuellement, le ou les orifices 22 sont rebouchables après contrôle.  During a test phase, one aspect of the invention consists in implementing a method of checking the seal at the piston 10. For this purpose, a defined pressure gas is injected through the orifice 22. Any leaks are detected in case of pressure drop. The control has the advantage of being operable without deterioration of the pump and without disassembly of its components. It can therefore be repetitive on many parts produced or even be systematic. In this embodiment, the separation chamber 9a therefore also serves as a sealing control volume. Optionally, the orifices 22 are releasable after control.
Suivant une possibilité alternative ou complémentaire, le procédé de l'invention peut être tel qu'on utilise l'orifice 22 pour positionner un détecteur de fuite. Dans cette configuration, on met en pression d'autres parties de la pompe et on détecte d'éventuelles fuites au niveau de l'orifice 22. Dans un mode de réalisation préférée, on commence le test par l'admission d'un fluide de contrôle via l'ouverture d'entrée 18 de la pompe et on vérifie qu'aucune fuite n'est constatée au niveau de l'orifice 22. Puis, on admet un fluide de contrôle via l'ouverture de sortie et on effectue la vérification consistant à déterminer si des fuites sont détectées au niveau de l'orifice 22.  According to an alternative or complementary possibility, the method of the invention may be such that the orifice 22 is used to position a leak detector. In this configuration, other parts of the pump are pressurized and leaks are detected at the orifice 22. In a preferred embodiment, the test is started by the admission of a fluid of control via the inlet opening 18 of the pump and it is verified that no leak is observed at the orifice 22. Then, a control fluid is admitted via the outlet opening and the verification is carried out determining whether leaks are detected at the orifice 22.
On peut ensuite éventuellement reprendre la vérification initiale par l'admission de fluide de contrôle par l'ouverture d'entrée 18.  The initial verification may then be resumed by the admission of control fluid through the inlet opening 18.
Dans tous les cas, on pourra utiliser des moyens de détection courants notamment un détecteur de pression de fluide. Le fluide utilisé peut être de l'air ou tout autre fluide compatible avec l'application. En se référant à toutes les figures en combinaison et en prenant comme exemple une pompe 1 avec un pointeau 12 tel que décrit précédemment, ce qui n'est pas limitatif pour la présente invention, la pompe 1 peut fonctionner de la manière suivante. In any case, it will be possible to use current detection means, in particular a fluid pressure detector. The fluid used may be air or any other fluid compatible with the application. Referring to all the figures in combination and taking as an example a pump 1 with a needle 12 as described above, which is not limiting for the present invention, the pump 1 can operate in the following manner.
Une pression est exercée sur un élément du récipient 2 contenant le produit à distribuer. Ceci peut, par exemple, être fait sur la paroi du corps du récipient 2 même quand celui-ci est en matière souple ou déformable, notamment quand le récipient est en matière plastique et préférentiellement quand celui-ci présente la forme d'un tube, cela par une ou des pressions manuelles.  Pressure is exerted on an element of the container 2 containing the product to be dispensed. This may, for example, be done on the wall of the body of the container 2 even when it is of flexible or deformable material, especially when the container is made of plastic material and preferably when it has the shape of a tube, this by one or more manual pressures.
Ceci peut aussi être fait par l'intermédiaire d'une poire de faible volume qui est placée à distance du corps du récipient avantageusement déformable et est raccordée à celui-ci par un conduit souple, cette poire n'étant pas montrée aux figures.  This can also be done by means of a bulb of small volume which is placed at a distance from the body of the advantageously deformable container and is connected thereto by a flexible conduit, this pear being not shown in the figures.
Dans ces deux cas, la ou les pressions exercées sur respectivement le corps du récipient 2 ou la poire, poussent une quantité de produit dans la canalisation interne 1 1 du corps 10a du piston. Une partie de cette quantité de produit sera transmise à la chambre de refoulement 5 en passant par l'intérieur du pointeau 12 par exemple par la rainure 6 longitudinale médiane dudit pointeau 12.  In these two cases, the pressure or pressures exerted respectively on the body of the container 2 or the pear, push a quantity of product in the internal pipe 1 1 of the body 10a of the piston. Part of this quantity of product will be transmitted to the delivery chamber 5 through the interior of the needle 12, for example through the central longitudinal groove 6 of said needle 12.
Il est à garder à l'esprit que toutes ces opérations se déroulent sans que du produit pénètre dans la chambre de séparation 9a qui est donc étanche et isolée de l'écoulement du produit, protégeant ainsi les moyens de rappel 16 logés en son intérieur.  It should be borne in mind that all these operations take place without the product entering the separation chamber 9a which is therefore sealed and isolated from the flow of the product, thus protecting the return means 16 housed in its interior.
Comme du produit est introduit dans la chambre de refoulement 5, du fait de la pression exercée par la quantité de produit dans la pompe 1 , la chambre de refoulement 5 se dilate et son volume grandit, ce qui abaisse la tête 10b de piston vers le bas de la pompe 1 et fait baisser le pointeau 12 avec l'ensemble de la tête 10b. Ceci se produit à rencontre de la force de rappel exercé par les moyens de rappel 16 logés dans la chambre de séparation 9a étanche et/ou formés par les pans flexibles.  As the product is introduced into the discharge chamber 5, due to the pressure exerted by the amount of product in the pump 1, the discharge chamber 5 expands and its volume increases, which lowers the piston head 10b towards the bottom of the pump 1 and lowers the needle 12 with the entire head 10b. This occurs against the restoring force exerted by the return means 16 housed in the separation chamber 9a sealed and / or formed by the flexible panels.
Du fait de ce mouvement de descente de la tête 10b du piston, l'extrémité supérieure 12a du pointeau 12, servant d'élément d'obturation à l'ouverture de sortie 7 de la pompe, est dégagée de sa position de fermeture de cette ouverture de sortie 7 et n'obture plus celle-ci. Le produit peut donc quitter la chambre de refoulement 5 pour être distribué vers l'extérieur, avantageusement par pulvérisation, ceci notamment pour les liquides. Due to this downward movement of the piston head 10b, the upper end 12a of the needle 12, serving as a closure element to the outlet opening 7 of the pump, is released from its closed position of this outlet opening 7 and no longer obturates it. The product can leave the discharge chamber 5 to be dispensed to the outside, preferably by spraying, this especially for liquids.
Quand l'effort de poussée exercé par la quantité de produit dans la pompe 1 diminue, du fait de son évacuation de la pompe 1 , et redescend en dessous de l'effort de réaction des moyens de rappel 16, la tête 10b du piston est rappelée dans sa position haute par ces moyens de rappel 16 et l'extrémité supérieure 12a du pointeau 12 renferme l'embouchure.  When the thrust force exerted by the amount of product in the pump 1 decreases, because of its evacuation of the pump 1, and drops below the reaction force of the return means 16, the head 10b of the piston is recalled in its upper position by these return means 16 and the upper end 12a of the needle 12 encloses the mouth.
Les avantages de l'utilisation d'un pointeau pour effectuer l'obturation de l'ouverture de sortie de la pompe sont entre autres que le pointeau peut être avantageusement réalisé comme une pièce indépendante des collerettes formant avec lui la tête de piston. En effet, comme le pointeau et notamment son extrémité supérieure est la pièce de la tête de piston recevant le plus de sollicitations, ceci quand il est poussé contre l'ouverture de sortie de la pompe sous l'action des moyens de rappel, le pointeau est plus susceptible de s'user que les autres pièces formant la tête de piston. Avec un pointeau amovible, il est ainsi possible d'effectuer son changement sans avoir à changer toute la tête de piston et même tout le piston si la tête est monobloc avec le corps du piston.  The advantages of using a needle to shut off the outlet opening of the pump are among other things that the needle can be advantageously made as an independent part of the flanges forming with it the piston head. Indeed, as the needle and in particular its upper end is the part of the piston head receiving the most loads, this when it is pushed against the outlet opening of the pump under the action of the return means, the needle is more likely to wear than other parts forming the piston head. With a removable needle, it is possible to make its change without having to change the entire piston head and even the entire piston if the head is integral with the piston body.
L'invention n'est pas limitée aux modes de réalisation décrits mais s'étend à tout mode de réalisation conforme à son esprit. The invention is not limited to the embodiments described but extends to any embodiment within its spirit.
REFERENCES . pompe de dosageREFERENCES . dosing pump
. récipient. container
. élément de distribution. distribution element
. bouchon. plug
a. bouchonat. plug
. chambre de refoulement. discharge chamber
. rainure. groove
a. fenteat. slot
. ouverture de sortie. exit opening
. filetage. thread
. chambre principale. master bedroom
a. chambre de séparationat. separation chamber
0. piston0. piston
0a. corps de piston0a. piston body
0b. tête de piston 0b. piston head
1 . canalisation interne1. internal channeling
2. pointeau2. Needle
2a. extrémité supérieure du pointeau2b. tige du pointeau2a. upper end of the needle2b. needle stem
3. collerette extérieure3. outer collar
4. collerette intérieure4. inner collar
5. espace5. space
6. moyens de rappel6. means of recall
7. conduite7. driving
8. ouverture d'entrée8. entrance opening
0. chemise de guidage0. guide shirt
1 . base1. based
2. orifice2. orifice
3. siège3. seat
4. paroi périphérique 25. extrémité d'appui4. peripheral wall 25. bearing end
26. pan flexible26. flexible pan
27. articulation27. articulation
28. base de piston 29. tête de piston28. piston base 29. piston head
30. manchon 30. sleeve

Claims

REVENDICATIONS
1 . Pompe (1 ) de dosage et de distribution d'un produit liquide ou visqueux destinée à être associée à un récipient (2) contenant ledit produit, ladite pompe (1 ) présentant, à une extrémité longitudinale dite inférieure, une ouverture d'entrée (18) pour le passage du produit en provenance du récipient (2) et, à une extrémité longitudinale dite supérieure, une ouverture de sortie (7) pour la distribution du produit hors de la pompe (1 ), ladite pompe (1 ) présentant en son intérieur une chambre principale (9) recevant un piston (10) muni d'un corps (10a) et d'une tête (10b), ledit piston (10) étant mobile dans la longueur de la chambre principale (9), 1. Pump (1) for dosing and dispensing a liquid or viscous product intended to be associated with a container (2) containing said product, said pump (1) having, at a so-called lower longitudinal end, an inlet opening ( 18) for the passage of the product from the container (2) and, at a so-called upper longitudinal end, an outlet opening (7) for dispensing the product out of the pump (1), said pump (1) having in its interior a main chamber (9) receiving a piston (10) provided with a body (10a) and a head (10b), said piston (10) being movable in the length of the main chamber (9),
- ledit corps (10a) présentant une canalisation interne (1 1 ) le traversant dans le sens de sa longueur et reliée à l'ouverture d'entrée (18) à sa partie inférieure pour l'écoulement du produit provenant de ladite ouverture d'entrée (18),  - said body (10a) having an inner pipe (1 1) passing therethrough in the direction of its length and connected to the inlet opening (18) at its lower part for the flow of the product from said opening of entrance (18),
- ledit corps (10a) et la partie inférieure de ladite tête (10b) de piston (10) occupant la chambre principale (9) en ne laissant vide qu'une chambre de séparation (9a), disposée autour du corps (10a) de piston (10),  said body (10a) and the lower part of said piston head (10b) occupying the main chamber (9), leaving empty only a separation chamber (9a) arranged around the body (10a) of piston (10),
- ladite tête (10b) de piston séparant entièrement la chambre de séparation (9a) d'une chambre de refoulement (5) disposée à proximité de l'ouverture de sortie (7), la partie supérieure de ladite tête (10b) présentant en sa partie médiane supérieure un moyen d'obturation (12a) de ladite ouverture de sortie (7), la canalisation interne (1 1 ) à son extrémité supérieure débouchant indirectement dans la chambre de refoulement (5) pour l'écoulement du produit dans ladite chambre (5), ladite chambre de refoulement (5) présentant un volume variable selon le mouvement du piston (10) dans la chambre principale (9),  said piston head (10b) completely separating the separation chamber (9a) from a discharge chamber (5) disposed near the outlet opening (7), the upper part of said head (10b) having in its upper middle part means for closing (12a) said outlet opening (7), the inner pipe (1 1) at its upper end opening indirectly in the discharge chamber (5) for the flow of the product in said chamber (5), said delivery chamber (5) having a variable volume according to the movement of the piston (10) in the main chamber (9),
- des moyens de rappel (16) étant prévus pour agir sur le piston (10) en plaçant le moyen d'obturation (12a) en position de fermeture de ladite ouverture de sortie (7),  - return means (16) being provided for acting on the piston (10) by placing the closing means (12a) in the closed position of said outlet opening (7),
caractérisée en ce que la chambre de séparation (9a) est étanche par rapport à l'écoulement du produit en n'étant pas traversée par celui-ci en ce que la chambre principale (9) est au moins partiellement délimitée par une paroi périphérique (24) qui présente au moins un orifice débouchant d'une part dans la chambre principale (9) et d'autre part à l'extérieur de la pompe (1 ). characterized in that the separating chamber (9a) is leakproof with respect to the flow of the product without being traversed by the latter in that the main chamber (9) is at least partially delimited by a peripheral wall (24) which has at least one opening opening on the one hand in the main chamber (9) and on the other hand outside the pump (1). ).
2. Pompe (1 ) selon la revendication précédente, dans laquelle le moyen d'obturation (12a) est l'extrémité supérieure d'un pointeau (12) s'étendant entre l'extrémité supérieure de la canalisation interne (1 1 ) et l'ouverture de sortie (7) de la pompe (1 ). 2. Pump (1) according to the preceding claim, wherein the closure means (12a) is the upper end of a needle (12) extending between the upper end of the inner pipe (1 1) and the outlet opening (7) of the pump (1).
3. Pompe (1 ) selon la revendication précédente, dans laquelle le pointeau3. Pump (1) according to the preceding claim, wherein the needle
(12) présente une tige (12b) et une extrémité supérieure (12a) de forme arrondie ou en pointe. (12) has a rod (12b) and an upper end (12a) of rounded or pointed form.
4. Pompe (1 ) selon la revendication précédente, dans laquelle une portion de la tige (12b) est entourée d'une collerette intérieure (14), la portion restante de la tige (12b) et l'extrémité supérieure (12a) de forme arrondie ou en pointe du pointeau (12) dépassant vers le haut de ladite collerette intérieure (14), ladite collerette intérieure (14) étant entourée d'une collerette extérieure (13) en laissant un espace (15) entre elles, le pointeau (12) et lesdites (13, 14) collerettes formant la tête (10b) de piston (10). 4. Pump (1) according to the preceding claim, wherein a portion of the rod (12b) is surrounded by an inner flange (14), the remaining portion of the rod (12b) and the upper end (12a) of rounded or pointed form of the needle (12) protruding upwardly from said inner flange (14), said inner flange (14) being surrounded by an outer flange (13) leaving a gap (15) between them, the needle (12) and said (13, 14) flanges forming the piston head (10b) (10).
5. Pompe (1 ) selon la revendication précédente, dans laquelle l'espace (15) entre lesdites collerettes (13, 14) diminue en direction du corps (10a) du piston (10). 5. Pump (1) according to the preceding claim, wherein the space (15) between said flanges (13, 14) decreases towards the body (10a) of the piston (10).
6. Pompe (1 ) selon l'une quelconque des quatre revendications précédentes, dans laquelle le pointeau (12) présente un passage (6) pour le produit en provenance de la canalisation interne (1 1 ) en étant raccordé à sa partie inférieure à ladite canalisation interne (1 1 ) et au moins une ouverture de remplissage (6a) débouchant dans la chambre de refoulement (5) pour l'écoulement dudit produit dans la chambre de refoulement (5). 6. Pump (1) according to any one of the four preceding claims, wherein the needle (12) has a passage (6) for the product from the inner pipe (1 1) being connected to its lower part to said internal pipe (1 1) and at least one filling opening (6a) opening into the discharge chamber (5) for the flow of said product in the discharge chamber (5).
7. Pompe (1 ) selon la revendication précédente, dans laquelle le passage est réalisé par une rainure longitudinale (6) partant de la partie inférieure du pointeau (12) en vis-à-vis de la canalisation interne (1 1 ) et communiquant de manière étanche avec ladite canalisation (1 1 ), au moins une partie de la rainure (6) formant une fente (6a) sur la périphérie du pointeau (12), cette fente (6a) faisant office d'ouverture de remplissage. 7. Pump (1) according to the preceding claim, wherein the passage is formed by a longitudinal groove (6) from the lower part of the needle (12) vis-à-vis the inner pipe (1 1) and communicating sealingly with said pipe (1 1), at least a portion of the groove (6) forming a slot (6a) on the periphery of the needle (12), this slot (6a) acting as filling opening.
8. Pompe (1 ) selon la revendication précédente, dans laquelle la rainure longitudinale (6) s'étend sur toute la largeur du pointeau (12), deux parties de la rainure (6) formant chacune une fente (6a) sur la périphérie du pointeau (12), lesdites fentes (6a) étant disposées de manière opposée sur ladite périphérie. 8. Pump (1) according to the preceding claim, wherein the longitudinal groove (6) extends over the entire width of the needle (12), two portions of the groove (6) each forming a slot (6a) on the periphery the needle (12), said slots (6a) being oppositely disposed on said periphery.
9. Pompe (1 ) selon l'une des revendications précédentes dans laquelle les moyens de rappel (16) sont au moins en partie logés dans la chambre de séparation (9a). 9. Pump (1) according to one of the preceding claims wherein the return means (16) are at least partly housed in the separation chamber (9a).
10. Pompe (1 ) selon la revendication précédente, dans laquelle les moyens de rappel (16) comprennent un ressort hélicoïdal ou au moins une lame flexible entourant le corps (10a) du piston (10) sur au moins une partie de sa longueur. 10. Pump (1) according to the preceding claim, wherein the biasing means (16) comprises a helical spring or at least one flexible blade surrounding the body (10a) of the piston (10) over at least a portion of its length.
1 1 . Pompe (1 ) selon la revendication 9 dans laquelle les moyens de rappel (16) comportent un élément en matériau déformable élastiquement, de préférence en élastomère. 1 1. Pump (1) according to claim 9 wherein the return means (16) comprise a resiliently deformable material member, preferably elastomer.
12. Pompe (1 ) selon la revendication précédente dans laquelle l'élément en matériau déformable élastiquement est un corps cylindrique creux entourant le corps (10a) du piston (10). 12. Pump (1) according to the preceding claim wherein the element of elastically deformable material is a hollow cylindrical body surrounding the body (10a) of the piston (10).
13. Pompe (1 ) selon l'une des revendications 9 à 12 dans laquelle les moyens de rappel sont intégralement logés dans la chambre de séparation (9a). 13. Pump (1) according to one of claims 9 to 12 wherein the return means are integrally housed in the separation chamber (9a).
14. Pompe (1 ) selon l'une des revendications 1 à 12 dans laquelle les moyens de rappel (16) comportent au moins un pan flexible (26) formé sur le corps (10a). 14. Pump (1) according to one of claims 1 to 12 wherein the biasing means (16) comprise at least one flexible flange (26) formed on the body (10a).
15. Pompe (1 ) selon la revendication précédente dans laquelle le au moins un pan flexible (26) est une portion du corps (10a) ayant une forme tronconique. 15. Pump (1) according to the preceding claim wherein the at least one flexible flange (26) is a portion of the body (10a) having a frustoconical shape.
16. Pompe (1 ) selon l'une des deux revendications précédentes dans laquelle le au moins un pan flexible (26) est raccordé au reste du corps (10a) par des zones d'articulation (27). 16. Pump (1) according to one of the two preceding claims wherein the at least one flexible section (26) is connected to the rest of the body (10a) by hinge areas (27).
17. Pompe (1 ) selon la revendication précédente dans laquelle les zones d'articulation (27) comportent une épaisseur réduite relativement à celle du pan flexible (26). 17. Pump (1) according to the preceding claim wherein the hinge areas (27) have a reduced thickness relative to that of the flexible pan (26).
18. Pompe (1 ) selon l'une des revendications 14 à 17 comprenant plusieurs pans flexibles (26). 18. Pump (1) according to one of claims 14 to 17 comprising a plurality of flexible panels (26).
19. Pompe (1 ) selon la revendication précédente dans laquelle au moins deux pans flexibles (26) sont configurés de sorte à former un soufflet. 19. Pump (1) according to the preceding claim wherein at least two flexible faces (26) are configured to form a bellows.
20. Pompe (1 ) selon l'une des revendications précédentes dans laquelle le corps (10a) et la tête (10b) sont deux pièces distinctes emmanchées. 20. Pump (1) according to one of the preceding claims wherein the body (10a) and the head (10b) are two separate parts fitted.
21 . Pompe (1 ) selon l'une quelconque des revendications précédentes, pour laquelle l'ouverture de sortie (7) de la pompe (1 ) est dans le prolongement de son ouverture d'entrée (18) ou forme un angle avec celle-ci. 21. Pump (1) according to any one of the preceding claims, for which the outlet opening (7) of the pump (1) is in the extension of its inlet opening (18) or forms an angle with it .
22. Pompe (1 ) selon l'une quelconque des revendications 1 à 13, pour laquelle le corps (10a) du piston (10) comprend une base (21 ) vers son extrémité libre opposée à la tête (10a), la base (21 ) coopérant en ajustement glissant étanche avec une chemise de guidage (20). 22. Pump (1) according to any one of claims 1 to 13, wherein the body (10a) of the piston (10) comprises a base (21) towards its free end opposite the head (10a), the base ( 21) cooperating in tight sliding fit with a guide liner (20).
23. Pompe (1 ) selon la revendication précédente dans laquelle la base (21 ) comporte un profil extérieur s'évasant vers l'extrémité libre du corps (10a). 23. Pump (1) according to the preceding claim wherein the base (21) has an outer profile flaring towards the free end of the body (10a).
24. Pompe (1 ) selon la revendication précédente dans laquelle le profil extérieur est bombé de sorte à réaliser une convexité. 24. Pump (1) according to the preceding claim wherein the outer profile is curved so as to achieve a convexity.
25. Pompe (1 ) selon l'une des revendications 22 à 24 dans laquelle la base (21 ) comporte un profil intérieur s'évasant vers l'extrémité libre du corps (10a). 25. Pump (1) according to one of claims 22 to 24 wherein the base (21) has an inner profile flaring towards the free end of the body (10a).
26. Pompe (1 ) selon la revendication précédente dans laquelle l'épaisseur de la base (21 ) est décroissante en direction de l'extrémité libre du corps (10a). 26. Pump (1) according to the preceding claim wherein the thickness of the base (21) is decreasing towards the free end of the body (10a).
27. Pompe (1 ) selon l'une des deux revendications précédentes dans laquelle le profil intérieur est incurvé de sorte à réaliser une concavité. 27. Pump (1) according to one of the two preceding claims wherein the inner profile is curved so as to achieve a concavity.
28. Bouchon (4, 4a) rapportable destiné à être associé à un récipient (2) contenant un produit liquide ou visqueux, caractérisé en ce qu'il incorpore une pompe (1 ) de dosage et de distribution selon l'une quelconque des revendications précédentes. 28. Plug (4, 4a) reportable to be associated with a container (2) containing a liquid or viscous product, characterized in that it incorporates a pump (1) dosing and dispensing according to any one of claims preceding.
29. Récipient (2) comprenant un réservoir pour un produit liquide ou visqueux et présentant un élément de distribution (3) dudit produit, caractérisé en ce qu'il comporte une pompe (1 ) de dosage et de distribution selon l'une quelconque des revendications 1 à 27 ou un bouchon (4, 4a) rapportable selon la revendication précédente, la pompe (1 ) ou le bouchon (4, 4a) étant solidarisé avec ledit élément de distribution (3). 29. Container (2) comprising a reservoir for a liquid or viscous product and having a dispensing element (3) of said product, characterized in that it comprises a pump (1) dosing and dispensing according to any one of claims 1 to 27 or a plug (4, 4a) reportable according to the preceding claim, the pump (1) or the plug (4, 4a) being secured to said dispensing element (3).
30. Récipient (2) selon la revendication précédente, pour lequel la distribution du produit hors du récipient (2) se fait par pulvérisation, projection ou écoulement. 30. Container (2) according to the preceding claim, wherein the distribution of the product out of the container (2) is by spray, projection or flow.
31 . Procédé de contrôle d'une pompe (1 ) comprenant les étapes suivantes - utilisation d'une pompe selon l'une des revendications 1 à 27,31. A method of controlling a pump (1) comprising the following steps - Use of a pump according to one of claims 1 to 27,
- admission d'un fluide de contrôle dans la chambre principale (9) au travers de l'orifice (22), - admission of a control fluid into the main chamber (9) through the orifice (22),
- détection d'un niveau de perte d'étanchéité dans la chambre principale (9) au moyen du fluide de contrôle.  - Detecting a level of leakage in the main chamber (9) by means of the control fluid.
32. Procédé de contrôle d'une pompe (1 ) comprenant les étapes suivantes :32. A method of controlling a pump (1) comprising the following steps:
- utilisation d'une pompe selon l'une des revendications 1 à 27 ; - Use of a pump according to one of claims 1 to 27;
- admission d'un fluide de contrôle par l'ouverture d'entrée (18) ou par l'ouverture de sortie (7) ;  - admission of a control fluid through the inlet opening (18) or through the outlet opening (7);
- détection de fuite du fluide de contrôle au niveau de l'orifice (22).  - detection of leakage of the control fluid at the orifice (22).
EP12723130.6A 2011-05-11 2012-05-11 Pump for metering and dispensing a liquid or viscous product Not-in-force EP2707148B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1154045A FR2975021B1 (en) 2011-05-11 2011-05-11 PUMP FOR DOSING AND DISPENSING A LIQUID OR VISCOUS PRODUCT
PCT/EP2012/058717 WO2012152901A1 (en) 2011-05-11 2012-05-11 Pump for metering and dispensing a liquid or viscous product

Publications (2)

Publication Number Publication Date
EP2707148A1 true EP2707148A1 (en) 2014-03-19
EP2707148B1 EP2707148B1 (en) 2017-04-05

Family

ID=46148831

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12723130.6A Not-in-force EP2707148B1 (en) 2011-05-11 2012-05-11 Pump for metering and dispensing a liquid or viscous product

Country Status (5)

Country Link
US (1) US9353735B2 (en)
EP (1) EP2707148B1 (en)
DK (1) DK2707148T3 (en)
FR (1) FR2975021B1 (en)
WO (1) WO2012152901A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3004128B1 (en) * 2013-04-08 2017-01-13 Aptar France Sas IMPROVED SPRAY HEAD.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009149825A1 (en) * 2008-06-10 2009-12-17 Meadwestvaco Calmar Gmbh Fluid discharge head

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Publication number Priority date Publication date Assignee Title
DE3315334A1 (en) 1983-04-28 1984-10-31 Pfeiffer Erich Gmbh & Co Kg SPRAYER OR DOSING PUMP
FR2671329B1 (en) * 1991-01-07 1993-03-19 Valois MULTI-JET PUSH-BUTTON WITH CLOSURE.
US5842616A (en) * 1996-04-24 1998-12-01 Ter S.R.L. Atomized liquid dispenser applicable to manually operated pumps
DE19627228A1 (en) * 1996-07-05 1998-01-08 Pfeiffer Erich Gmbh & Co Kg Discharge device for media
IT1294275B1 (en) * 1997-07-24 1999-03-24 Giovanni Albini FLUID DISPENSING BUTTON THROUGH A MOBILE NOZZLE ON THE BUTTON ITSELF
FR2815611B1 (en) * 2000-10-23 2003-04-11 Valois Sa DISPENSING HEAD AND FLUID PRODUCT DISPENSER COMPRISING SUCH A DISPENSING HEAD
DE102005043258A1 (en) * 2004-09-14 2006-03-16 Eric Schliemann Device for the metered dispensing of a medium
GB0610666D0 (en) * 2006-05-30 2006-07-05 Glaxo Group Ltd Fluid dispenser
DE102008027598A1 (en) * 2008-06-10 2009-12-24 Meadwestvaco Calmar Gmbh Fluid discharge head for use with fluid discharge device, has valve body with intermediate valve disk that defines compartment bottom of pressure chamber, where medium discharge pressure is adjusted in chamber to open upper valve seat

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Publication number Priority date Publication date Assignee Title
WO2009149825A1 (en) * 2008-06-10 2009-12-17 Meadwestvaco Calmar Gmbh Fluid discharge head

Non-Patent Citations (1)

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Title
See also references of WO2012152901A1 *

Also Published As

Publication number Publication date
FR2975021B1 (en) 2014-03-07
US20150139834A1 (en) 2015-05-21
EP2707148B1 (en) 2017-04-05
WO2012152901A1 (en) 2012-11-15
DK2707148T3 (en) 2017-07-24
FR2975021A1 (en) 2012-11-16
US9353735B2 (en) 2016-05-31

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