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EP0591365B1 - Device for dispensing a predetermined dose of fluid product, and method of filling thereof - Google Patents

Device for dispensing a predetermined dose of fluid product, and method of filling thereof Download PDF

Info

Publication number
EP0591365B1
EP0591365B1 EP92913803A EP92913803A EP0591365B1 EP 0591365 B1 EP0591365 B1 EP 0591365B1 EP 92913803 A EP92913803 A EP 92913803A EP 92913803 A EP92913803 A EP 92913803A EP 0591365 B1 EP0591365 B1 EP 0591365B1
Authority
EP
European Patent Office
Prior art keywords
piston
tank
further characterized
cylindrical
pusher
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.)
Expired - Lifetime
Application number
EP92913803A
Other languages
German (de)
French (fr)
Other versions
EP0591365A1 (en
Inventor
Philippe Résidence Vallon Saint-Hilaire SOLIGNAC
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.)
Aptar France SAS
Original Assignee
Valois SAS
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
Priority claimed from FR9107854A external-priority patent/FR2678243B3/en
Priority claimed from FR9108624A external-priority patent/FR2678906B1/en
Application filed by Valois SAS filed Critical Valois SAS
Publication of EP0591365A1 publication Critical patent/EP0591365A1/en
Application granted granted Critical
Publication of EP0591365B1 publication Critical patent/EP0591365B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B05B11/0027Means for neutralising the actuation of the sprayer ; Means for preventing access to the sprayer actuation 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
    • B05B11/0005Components or details
    • B05B11/0062Outlet valves actuated by the pressure of the fluid to be sprayed
    • B05B11/0064Lift valves
    • 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
    • B05B11/007Outlet valves actuated by the pressure of the fluid to be sprayed being opened by deformation of a sealing element made of resiliently deformable material, e.g. flaps, skirts, duck-bill valves
    • 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
    • B05B11/0097Means for filling or refilling the sprayer
    • 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
    • B05B11/02Membranes or pistons acting on the contents inside the container, e.g. follower pistons
    • 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
    • B05B11/1001Piston pumps
    • B05B11/1023Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem
    • 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
    • B05B11/1001Piston pumps
    • B05B11/1023Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem
    • B05B11/1025Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem a spring urging the outlet valve in its closed position
    • 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
    • B05B11/1001Piston pumps
    • B05B11/1023Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem
    • B05B11/1026Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem the piston being deformable and its deformation allowing opening of the outlet

Definitions

  • the present invention relates to a device for spraying a predetermined dose of a fluid product, and to its filling method. More particularly, the invention relates to a device containing a single dose of product and disposable after emission of this dose.
  • the product to be sprayed can be a drug, a cosmetic or the like.
  • the device according to the invention is more specifically intended for nasal sprays, but could be used for other purposes: ear, sublingual sprays, etc.
  • the single dose can optionally be divided into several sub-doses, as disclosed in document EP-A-0 311 863.
  • the object of the present invention is in particular to avoid this drawback, without significantly increasing the cost of the device, which is disposable after a single actuation.
  • the pusher comprises a cylindrical part which extends between an end close to the cylindrical tank and a stop more distant from the cylindrical tank, said end close to the product tank is secured to a crown , said product outlet passage is disposed at least partially inside said cylindrical part, said pusher, said product outlet passage opens out of said cylindrical part between said ring and said stopper, in the vicinity of said ring, the piston comprises an internal sleeve which slides on said cylindrical part of the pusher, and said piston is in sealed contact with said crown when it is in its storage position.
  • the piston has an outer peripheral sealing lip which slides in leaktight manner in the cylindrical tank and which is wedged between the tank and the crown when the piston is in its storage position.
  • the crown comprises an annular rib directed towards the piston
  • the piston comprises an annular groove adapted to receive the rib of the crown
  • the piston comprises an annular rib directed towards the crown and inside said annular groove
  • the crown has an annular groove adapted to receive the annular rib of the piston.
  • the crown may include at least one passage which communicates the reservoir with the groove called the piston when said piston is in its storage position, and the rib of the piston is then in sealed contact with the groove of the crown.
  • the cylindrical reservoir has a bottom and the crown has a face directed towards said bottom and having a shape substantially complementary to said bottom, and said face of the crown bitted against said bottom at the end of the piston stroke, so that substantially all of the product contained in the tank is expelled.
  • the piston can optionally be urged towards its storage position by elastic means.
  • the internal sleeve said piston can be in abutment against the stop bed of the pusher when the piston is in its storage position, and the displacement said piston towards its actuation position is then made by deformation of at least a part of said internal sleeve.
  • the internal sleeve of the piston then has longitudinal slots over a part of its length in the vicinity of said stop of the actuating means, so as to facilitate the deformation of said internal sleeve.
  • the said piston sleeve can be applied in sealed contact against said stop of the pusher when the piston is in its actuation position.
  • said abutment has a concave annular surface surrounding the cylindrical wall and of concavity directed towards the sleeve, and said concave annular surface deforms radially inward a free end of said sleeve when the piston is in its actuation position.
  • the so-called piston sleeve can slide with sealing on the cylindrical wall of the pusher.
  • the piston has a cylindrical part which slides on a complementary cylindrical part of the crown while maintaining cut off the communication between the cylindrical reservoir and the product outlet passage as long as the piston has not moved away from the crown from a predetermined distance.
  • the cylindrical product reservoir has a filling orifice capable of receiving a stopper ball, and said orifice is extended towards the outside of the reservoir by a duct provided with longitudinal slots, said ball can be forced into said conduit in an intermediate position where it allows the communication of the tank with the outside via said longitudinal slots.
  • the device may include an elastic means which biases the piston towards its closed position.
  • said piston at rest, is in sealed contact with said crown along a peripheral line close to the cylindrical wall of the reservoir so that only a radially outer part of the piston is initially exposed to the pressure prevailing in the reservoir , so that the section of the piston which is exposed to the pressure prevailing in the tank increases suddenly when the piston separates from the crown, which promotes a clear opening of the communication between the tank and the outlet passage.
  • the locking means which immobilize the pusher axially with respect to the reservoir.
  • said locking means are unlockable by a rotation of the pusher relative to the reservoir.
  • the locking means remain locked in the unlocked position after they have been unlocked.
  • the means may consist of at least one bridge of breakable material between the pusher and the reservoir.
  • it includes means for preventing its involuntary actuation.
  • it comprises at least one zone of breakable material which forms a stop which opposes actuation and which is broken during actuation.
  • said means comprise latching means which are in the latched position at least when the device is in its rest position.
  • said latching means are also in the latched position when the device is in its end of actuation position.
  • Figures 1 to 4 show a first embodiment of the device according to the invention.
  • This device is intended to project a single dose of fluid, generally of the order of a few milliliters.
  • the device of the invention is therefore small, and measures a few centimeters in its largest dimension. It is generally made of plastic.
  • the device comprises a pusher 3 provided with an outlet nozzle 18 having an enlarged base 19 from which extends radially outward a support surface 20 extended by a skirt 21.
  • a pump body 22 comprising support wings 23 adapted to slide in said skirt 21.
  • the device can be actuated by being held between the thumb and one or two fingers , the thumb being applied against the support wings 23 and the other fingers being applied against the support surface 20.
  • the skirt 21 generally has a recess 24 allowing the passage of the thumb.
  • the pump body 22 comprises a cylindrical reservoir 1 which extends between an open end 25 and a bottom 16 provided with a filling orifice 26.
  • the filling orifice 26 can be closed by a ball 27 force-fitted into said orifice, or by any other means of sealing.
  • the skirt 21 of the pusher 3 has at its free end an internal snap-on lip 28 which makes it possible to maintain said support wings 23 inside said skirt 21.
  • the enlarged base 19 of the outlet nozzle 18 is constituted by a cylindrical wall 29 arranged around the cylindrical tank 1, and which extends between the bearing surface 20 and an annular wall 9 which itself extends radially inwards to the outlet end piece 18.
  • the outlet end piece 18 extends between said annular wall 9 and an outlet end 30 comprising an outlet opening 6.
  • the outlet end piece 18 is hollow, and extends over a certain distance inside the cylindrical wall 29 of the enlarged base 19, by a cylindrical wall 7 which extends to one end 8.
  • the outlet nozzle 18 and the cylindrical wall 7 define a cylindrical longitudinal channel 31 which communicates with the outlet orifice 6.
  • a rod 4 also cylindrical is force fitted into the longitudinal channel 31.
  • the rod 4 extends from a first end 32 placed in contact with the outlet end 30 of the outlet nozzle 18, up to beyond end 8 of the cylindrical wall 7, where said rod 4 is extended radially outward by a ring 10.
  • the rod 4 has over its entire height one or more external grooves 5 which communicate with the outlet orifice 6, generally by grooves formed on the first end 32 of the rod 4, in a well known manner.
  • the device of the invention further comprises a piston 2 which slides in the cylindrical tank 1, and which can slide on the cylindrical wall 7 of the pusher between the ring 10 and the annular wall 9 forming a stop.
  • the piston 2 includes an internal sleeve 11 which extends to a free end 43 close to the annular wall 9 of the pusher, and which slides on the cylindrical wall 7 of the pusher.
  • the piston 23 has an outer skirt 33 which slides in leaktight manner in the cylindrical tank 1.
  • FIG. 3 represents in detail the structure of the piston 2 and of the crown 10.
  • the crown 10 comprises an annular rib 12 directed towards the piston, and the piston 2 comprises an annular groove 13 disposed opposite the annular rib 12.
  • the groove annular 13 of the piston is delimited externally by an outer peripheral sealing lip 34 of the skirt 33, which slides in sealed contact in the cylindrical tank 1, and by a rib 14.
  • the crown 10 further comprises a groove 15 adapted to receive said rib 14.
  • the piston 2 When mounting the device, the piston 2 is first assembled on the crown 10 by fitting the annular rib 12 into the groove 13. Then the rod 4 is force-fitted into the longitudinal channel 31 of the pusher and the piston 2 is introduced into the cylindrical reservoir 1.
  • the cylindrical reservoir 1 advantageously comprises an internal chamfer 41 at its end opened. When the sealing lip 34 is introduced into the chamfer 41, it is gradually deformed radially inwards, so that it comes to tighten the rib 12 which is thus compressed between the rib 14 and the lip 34.
  • the contact between the lip 34 and the rib 12 is not sealed, since the crown 40 has one or more slots 40 at its outer periphery, which make the reservoir of product 1 with groove 13 of the piston.
  • the seal between the piston 2 and the crown 10 is ensured by the contact between the rib 14 and the groove 15. This seal is reinforced by the radial tightening due to the sealing lip 34, which applies the rib 12 between the rib 14.
  • the rib 14 is also wedged in the groove 15, and participates in the wedging of the piston 2 on the crown 10.
  • the slots 40 can be omitted.
  • the wedging and sealing between the piston 2 and the crown 10 could be ensured by the contact between the sealing lip 34 and the crown 10, provided that said crown 10 no longer comprises slots 40. It is then no longer necessary to provide a rib or groove on the piston 2 or the crown 10.
  • the annular wall 9 has an annular surface 42, although visible in Figure 4A, surrounding the cylindrical wall 7 and forming an acute angle with said cylindrical wall 7.
  • the free end 43 of the sleeve 11 abuts against this surface 42, so that by wedge effect, the surface 42 deforms the free end 43 of the sleeve 11 radially inward, and applies it against the cylindrical wall 7 of the pusher.
  • this deformation is accompanied by a significant pressure applied by the surface 42 on the sleeve 11.
  • the free end 43 of the sleeve 11 is in sealed contact with on the one hand the annular surface 42, and on the other hand with the cylindrical wall 7.
  • the space 35 places the cylindrical reservoir 1 in communication with the grooves 5 of the rod 4, so that the product contained in said cylindrical reservoir 1 can be expelled through the passage 35, the grooves 5 and the outlet orifice 6, while the piston 2 and the crown 10 descend into said cylindrical reservoir 1, towards the bottom 16.
  • This movement stops when the crown 10 abuts against said bottom 16.
  • the crown 10 has a face 17 directed towards the bottom 16 which has a shape substantially complementary to that of said bottom 16 and of the ball 27, so that when the crown 10 is in abutment against the bottom 16, substantially all of the product contained in the cylindrical tank 1 has been expelled. This limits the loss of part of the product contained in the cylindrical tank, which is particularly useful when the product is expensive, or when its use is regulated (case of drugs based on prohibited drugs) FIG.
  • FIG. 5 represents a variant of the device of FIG. 1, in which an elastic means such as a helical spring 36 is disposed between the annular wall of the pusher 3 and the piston 2, so as to elastically urge the piston 2 towards the crown 10.
  • an elastic means such as a helical spring 36 is disposed between the annular wall of the pusher 3 and the piston 2, so as to elastically urge the piston 2 towards the crown 10.
  • This variant can be useful in particular in the case where the volume of the dose to be projected is relatively large, and where the stroke of the piston 2 in the cylindrical reservoir 1 is relatively large. Indeed, it could be possible while a user interrupts or slows down the movement of the piston 2 in the cylindrical tank 1 during the stroke of said piston 2. In this case, the pressure inside the cylindrical tank 1 decreases, so that the helical spring 36 pushes the piston 2 towards the crown 10, again isolating the cylindrical reservoir 1 from the outlet grooves 5.
  • the piston 2 then does not separate from the crown 10 until the pressure in the cylindrical reservoir 1 has again become sufficient to overcome the force of the spring 36. This guarantees a fine spraying of the product at the outlet of the device.
  • the helical spring 36 reinforces the jamming of the piston 2 on the crown 10 when said piston is in its storage position.
  • Figures 6 and 7 show another variant of the device of the invention, in which the internal sleeve 11 of the piston 2 is placed in abutment against the annular wall 9, when the piston is in its storage position. So the displacement of the piston towards its actuating position, as shown in Figure 7, is by deformation of a portion of the inner sleeve 11 of the piston, radially outward, in the vicinity of the annular wall 9 of the pusher.
  • the ring 10 it is particularly advantageous for the ring 10 to have a cylindrical surface 44 on which a complementary cylindrical part of the piston slides with sealing. If the height of the cylindrical surface 44 is called h, the piston 2 must move away from the crown 10 by the distance h before freeing the passage between the product reservoir 1 and the outlet grooves 5. This distance h traveled by the piston corresponds to a predetermined compression of the sleeve 11 which itself corresponds to a predetermined force exerted by the sleeve 11 on the piston 2: thus, it is ensured that the product is only expelled if the pressure inside the tank 1 reaches a predetermined value, and therefore said product is sprayed finely.
  • FIG. 9 represents a variant of the device of FIGS. 6 and 7, in which the internal sleeve 11 of the piston has longitudinal slots 37 which extend over part of its length in the vicinity of the annular wall 9 of the pusher 3, so to facilitate the deformation of said internal sleeve 11.
  • the seal between the piston 2 and the pusher can no longer be ensured at the level of the annular wall 9. It is then possible to produce a peripheral sealing lip 45 between the sleeve 11 of the piston and the cylindrical wall 7 of the pusher, as shown in FIG. 10.
  • This lip 45 could be formed for example inside the sleeve 11, but could also be formed outside the cylindrical wall 7. It will be noted that the variants described above of the device of the invention could also be equipped with the sealing lip 45, replacing the sealing by abutment of the sleeve 11 against the wall 9.
  • the step of evacuating the vacuum chamber can be placed after the step of introducing into the reservoir 1 a volume of product measured externally.
  • the volume of product introduced into the tank 1 is chosen between 0 and a maximum volume. This is particularly advantageous insofar as the same spraying device according to the invention can be used to contain doses of products various, which makes it possible to produce in larger series and therefore at a lower cost.
  • the enlarged base 19 of the end piece 18 may include slots 46, which make it possible to precisely adjust the position of the reservoir 1 relative to the piston 2, in order to precisely fix the maximum volume of product which can be contained in said tank 1.
  • the slots 46 make it possible to press the piston 2 and not the pusher 3 during the positioning of said piston in the cylindrical tank 1. This prevents the piston 2 from leaving its storage position when it is put in place, due to the friction between said piston and the cylindrical tank 1.
  • the orifice 26 of the bottom 16 can be extended towards the outside by a conduit 47 provided with longitudinal slots 48.
  • the ball 27 can be partially introduced into the conduit 48 without blocking the orifice 26, which then communicates with outside by the slots 48.
  • FIGS. 12 to 14 a variant of the invention is shown which aims to guarantee more securely that the device is kept in its storage position.
  • the piston 2 is not shown, any more than the rod 4 and the crown 10.
  • the reservoir 1 has two grooves 100 in a plane perpendicular to the axis of the device, and each groove 100 communicates at one end with an axial groove 101 which moves away from the pusher 3.
  • the pusher 3 comprises two elastic arms 102 substantially axial, which each extend to a free end provided with a lug 103 which in the rest position, enters a groove 100 at its end which does not communicate with an axial groove 101. In the rest position, the pusher 3 is therefore immobilized axially, relative to the reservoir 1.
  • a welding point 104 is produced between the pusher 3 and the reservoir 1, in order to guarantee that the two parts do not move relative to each other during storage or transport, and to put clearly any opening of the device or any actuation of the device, the weld point 104 being broken during the opening or actuation.
  • the device comprises an anti-opening security which consists of elastic lugs 105 snapped into orifices 106 in the pusher when the device is in its storage position.
  • the pins have a lower face 105a whose normal is directed axially away from the outlet 30 of the pusher 3, and an inclined upper face 105b whose normal has an axial component directed towards the end piece 18 and a radial component directed towards outside.
  • the lower face 105a abuts against the wall of the pusher while preventing the reservoir 1 from being removed, while when the reservoir 1 is urged towards the outlet 30 of the pusher, the inclined face 105b pushes the lug 105 and the emerges from the orifice 106, which allows actuation.
  • the pusher 3 further comprises orifices 107 in which the lugs 105 engage when the device is in its end of actuation position, so that the reservoir 1 cannot be opened to be refilled.
  • the reservoir 1 it is advantageous for the reservoir 1 to be guided in its axial movement relative to the pusher 3, so that the pins 105 certainly penetrate into the orifices 107.
  • the pusher 3 has detachable pads 108 and the reservoir 1 has axial rods 109 in correspondence, which punch the pellets 108 by detaching them from the pusher 3 during actuation. This avoids inadvertent actuation during storage or transport, and the detachment of the pellets 108 highlights the fact that the device has already been actuated.

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  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

A device for dispensing in divided form a single dose of a fluid product comprises at least: a cylindrical reservoir (1) containing the said dose of product; a piston (2) sliding in the said cylindrical reservoir (1); an actuating means (3, 4) for the piston (2); an outlet passage (5, 6) communicating with the said cylindrical reservoir (1). The piston (2) can move with respect to the said actuating means (3, 4) between a rest position where it prevents communication between the said outlet passage (5, 6) and the said cylindrical reservoir (1) and a working position where it allows the outlet passage (5, 6) to communicate with the cylindrical reservoir (1). It is characterised in that the piston (2) is held in its rest position by wedging.

Description

La présente invention concerne un dispositif pour projeter une dose prédéterminée d'un produit fluide, et son procédé de remplissage. Plus particulièrement, l'invention concerne un dispositif contenant une dose unique de produit et jetable après émission de cette dose. Le produit à projeter peut être un médicament, un cosmétique ou similaire. Le dispositif selon l'invention est plus spécialement destiné aux pulvérisations nasales, mais pourrait être utilisé dans d'autres buts : pulvérisations auriculaires, sublinguales, etc..The present invention relates to a device for spraying a predetermined dose of a fluid product, and to its filling method. More particularly, the invention relates to a device containing a single dose of product and disposable after emission of this dose. The product to be sprayed can be a drug, a cosmetic or the like. The device according to the invention is more specifically intended for nasal sprays, but could be used for other purposes: ear, sublingual sprays, etc.

La dose unique peut éventuellement être fractionnée en plusieurs sous-doses, comme divulgué dans le document EP-A-0 311 863.The single dose can optionally be divided into several sub-doses, as disclosed in document EP-A-0 311 863.

De tels dispositifs sont connus dans l'état de l'art. Par exemple, le document EP-A-0 311 863 décrit un dispositif comportant un réservoir cylindrique de produit fluide dans lequel coulisse un piston solidaire d'un poussoir d'actionnement. Le dispositif comporte en outre un passage de sortie qui communique avec le réservoir de produit. Mais ce passage de sortie n'est pas étanche à l'air, de sorte que le produit contenu dans le réservoir peut s'oxyder ou se polluer au contact de l'air pendant son stockage.Such devices are known in the state of the art. For example, document EP-A-0 311 863 describes a device comprising a cylindrical reservoir of fluid product in which slides a piston secured to an actuating pusher. The device further includes an outlet passage which communicates with the product reservoir. However, this outlet passage is not airtight, so that the product contained in the tank can oxidize or become polluted on contact with air during its storage.

La présente invention a notamment pour but d'éviter cet inconvénient, sans renchérir sensiblement le coût du dispositif, qui est jetable après un actionnement unique.The object of the present invention is in particular to avoid this drawback, without significantly increasing the cost of the device, which is disposable after a single actuation.

La présente invention a donc pour objet un dispositif pour projeter sous forme divisée une dose unique d'un produit fluide, comportant au moins :

  • un réservoir cylindrique contenant ladite dose de produit,
  • un piston coulissant dans ledit réservoir cylindrique,
  • un poussoir pour actionner le piston,
  • un passage de sortie pouvant communiquer avec ledit réservoir cylindrique,
caractérisé en ce que ledit piston est monté coulissant sur ledit poussoir et déplaçable par rapport audit poussoir entre une position de stockage (fig. 1) où il coupe la communication entre ledit passage de sortie et ledit réservoir cylindrique, et une position d'actionnement (figure 4) où il met en communication ledit passage de sortie avec le réservoir cylindrique, le piston étant disposé pour qu'une pression régnant dans le réservoir cylindrique sollicite le piston vers sa position d'actionnement, et le piston est maintenu dans sa position de stockage par coincement sur le poussoir, et ne peut être déplacé vers sa position d'actionnement que s'il règne dans le réservoir cylindrique une pression suffisante pour le décoincer, ladite pression étant obtenue en appuyant sur le poussoir.The present invention therefore relates to a device for projecting in divided form a single dose of a fluid product, comprising at least:
  • a cylindrical reservoir containing said dose of product,
  • a piston sliding in said cylindrical tank,
  • a pusher to actuate the piston,
  • an outlet passage which can communicate with said cylindrical tank,
characterized in that said piston is slidably mounted on said pusher and movable relative to said pusher between a storage position (fig. 1) where it cuts the communication between said outlet passage and said cylindrical reservoir, and an actuation position ( Figure 4) where it communicates said outlet passage with the cylindrical reservoir, the piston being arranged so that a pressure prevailing in the cylindrical reservoir biases the piston towards its actuation position, and the piston is maintained in its position storage by jamming on the pusher, and can only be moved to its actuating position if there is sufficient pressure in the cylindrical tank to loosen it, said pressure being obtained by pressing the pusher.

Dans une forme de réalisation particulière de l'invention, le poussoir comporte une partie cylindrique qui s'étend entre une extrémité proche du réservoir cylindrique et une butée plus éloignée du réservoir cylindrique, ladite extrémité proche du réservoir de produit est solidaire d'une couronne, ledit passage de sortie du produit est disposé au moins partiellement à l'intérieur de ladite partie cylindrique dit poussoir, ledit passage de sortie du produit débouche hors de ladite partie cylindrique entre ladite couronne et ladite butée, au voisinage de ladite couronne, le piston comporte un manchon interne qui coulisse sur ladite partie cylindrique du poussoir, et ledit piston est en contact étanche avec ladite couronne lorsqu'il est dans sa position de stockage.In a particular embodiment of the invention, the pusher comprises a cylindrical part which extends between an end close to the cylindrical tank and a stop more distant from the cylindrical tank, said end close to the product tank is secured to a crown , said product outlet passage is disposed at least partially inside said cylindrical part, said pusher, said product outlet passage opens out of said cylindrical part between said ring and said stopper, in the vicinity of said ring, the piston comprises an internal sleeve which slides on said cylindrical part of the pusher, and said piston is in sealed contact with said crown when it is in its storage position.

Avantageusement, le piston comporte une lèvre d'étanchéité périphérique extérieure qui coulisse de façon étanche dans le réservoir cylindrique et qui est coincée entre le réservoir et la couronne lorsque le piston est dans sa position de stockage. Dans un exemple particulier de réalisation, la couronne comporte une nervure annulaire dirigée vers le piston, le piston comporte une gorge annulaire adaptée à recevoir la nervure de la couronne, le piston comporte une nervure annulaire dirigée vers la couronne et intérieure à ladite gorge annulaire, et la couronne comporte une gorge annulaire adaptée à recevoir la nervure annulaire du piston. Dans ce cas, la couronne peut comporter au moins un passage qui fait communiquer le réservoir avec la gorge dit piston lorsque ledit piston est dans sa position de de stockage, et la nervure du piston est alors en contact étanche avec la gorge de la couronne.Advantageously, the piston has an outer peripheral sealing lip which slides in leaktight manner in the cylindrical tank and which is wedged between the tank and the crown when the piston is in its storage position. In a particular embodiment, the crown comprises an annular rib directed towards the piston, the piston comprises an annular groove adapted to receive the rib of the crown, the piston comprises an annular rib directed towards the crown and inside said annular groove, and the crown has an annular groove adapted to receive the annular rib of the piston. In this case, the crown may include at least one passage which communicates the reservoir with the groove called the piston when said piston is in its storage position, and the rib of the piston is then in sealed contact with the groove of the crown.

Avantageusement, le réservoir cylindrique comporte un fond et la couronne comporte une face dirigée vers ledit fond et ayant une forme sensiblement complémentaire dudit fond, et ladite face de la couronne bitte contre ledit fond en fin de course du piston, de sorte que sensiblement tout le produit contenu dans le réservoir est expulsé.Advantageously, the cylindrical reservoir has a bottom and the crown has a face directed towards said bottom and having a shape substantially complementary to said bottom, and said face of the crown bitted against said bottom at the end of the piston stroke, so that substantially all of the product contained in the tank is expelled.

Le piston peut éventuellement être sollicité vers sa position de stockage par un moyen élastique.The piston can optionally be urged towards its storage position by elastic means.

Le manchon interne dit piston peut être en appui contre lit butée du poussoir lorsque le piston est dans sa position de stockage, et le déplacement dit piston vers sa position d'actionnement se fait alors par déformation d'au moins une partie dudit manchon interne. Avantageusement, le manchon interne du piston comporte alors des fentes longitudinales sur une partie de sa longueur au voisinage de ladite butée du moyen d'actionnement, de façon à faciliter la déformation dudit manchon interne.The internal sleeve said piston can be in abutment against the stop bed of the pusher when the piston is in its storage position, and the displacement said piston towards its actuation position is then made by deformation of at least a part of said internal sleeve. Advantageously, the internal sleeve of the piston then has longitudinal slots over a part of its length in the vicinity of said stop of the actuating means, so as to facilitate the deformation of said internal sleeve.

Le manchon dit piston peut être appliqué en contact étanche contre ladite butée du poussoir lorsque le piston est dans sa position d'actionnement. Avantageusement, ladite butée comporte une surface annulaire concave entourant la paroi cylindrique et de concavité dirigée vers le manchon, et ladite surface annulaire concave déforme radialement vers l'intérieur une extrémité libre dudit manchon lorsque le piston est dans sa position d'actionnement. En variante, le manchon dit piston peut coulisser avec étanchéité sur la paroi cylindrique du poussoir.The said piston sleeve can be applied in sealed contact against said stop of the pusher when the piston is in its actuation position. Advantageously, said abutment has a concave annular surface surrounding the cylindrical wall and of concavity directed towards the sleeve, and said concave annular surface deforms radially inward a free end of said sleeve when the piston is in its actuation position. Alternatively, the so-called piston sleeve can slide with sealing on the cylindrical wall of the pusher.

Dans une forme particulière de réalisation, le piston comporte une partie cylindrique qui coulisse sur une partie cylindrique complémentaire de la couronne en maintenant coupée la communication entre le réservoir cylindrique et le passage de sortie du produit tant que le piston ne s'est pas éloigné de la couronne d'une distance prédéterminée.In a particular embodiment, the piston has a cylindrical part which slides on a complementary cylindrical part of the crown while maintaining cut off the communication between the cylindrical reservoir and the product outlet passage as long as the piston has not moved away from the crown from a predetermined distance.

Dans une autre forme particulière de réalisation de l'invention, le réservoir cylindrique de produit comporte un orifice de remplissage pouvant recevoir une bille de bouchage, et ledit orifice est prolongé vers l'extérieur du réservoir par un conduit doté de fentes longitudinales, ladite bille pouvant être emboîtée à force dans ledit conduit dans une position intermédiaire où elle permet la communication du réservoir avec l'extérieur par l'intermédiaire desdites fentes longitudinales.In another particular embodiment of the invention, the cylindrical product reservoir has a filling orifice capable of receiving a stopper ball, and said orifice is extended towards the outside of the reservoir by a duct provided with longitudinal slots, said ball can be forced into said conduit in an intermediate position where it allows the communication of the tank with the outside via said longitudinal slots.

La présente invention a aussi pour objet un procédé de remplissage du dispositif susmentionné, comportant au moins les étapes suivantes :

  • introduction du dispositif dans une chambre à vide, maintenue sous vide,
  • introduction dans le réservoir cylindrique d'un volume prédéterminé de produit,
  • fermeture sous vide du réservoir cylindrique,
caractérisé en ce que ledit volume prédéterminé de produit est mesuré par un moyen de mesure extérieur au dispositif de l'invention et ledit volume peut avoir une valeur quelconque inférieure ou égale au volume total dudit réservoir cylindrique.The present invention also relates to a method of filling the above-mentioned device, comprising at least the following steps:
  • introduction of the device into a vacuum chamber, maintained under vacuum,
  • introduction into the cylindrical tank of a predetermined volume of product,
  • vacuum closure of the cylindrical tank,
characterized in that said predetermined volume of product is measured by a measurement means external to the device of the invention and said volume can have any value less than or equal to the total volume of said cylindrical tank.

Le dispositif peut comporter un moyen élastique qui sollicite le piston vers sa position de fermeture.The device may include an elastic means which biases the piston towards its closed position.

Selon une forme de réalisation avantageuse, au repos, ledit piston est en contact étanche avec ladite couronne selon une ligne périphérique proche de la paroi cylindrique de réservoir de façon que seule une partie radialement extérieure du piston soit initialement exposée à la pression régnant dans le réservoir, de sorte que la section du piston qui est exposée à la pression régnant dans le réservoir augmente brutalement lorsque le piston se sépare de la couronne, ce qui favorise une ouverture nette de la communication entre le réservoir et le passage de sortie.According to an advantageous embodiment, at rest, said piston is in sealed contact with said crown along a peripheral line close to the cylindrical wall of the reservoir so that only a radially outer part of the piston is initially exposed to the pressure prevailing in the reservoir , so that the section of the piston which is exposed to the pressure prevailing in the tank increases suddenly when the piston separates from the crown, which promotes a clear opening of the communication between the tank and the outlet passage.

Selon une forme de réalisation qui peut s'appliquer à tout dispositif du type général visé en introduction, il comporte des moyens de verrouillage qui immobilisent axialement le poussoir par rapport au réservoir. Avantageusement, lesdits moyens de verrouillage sont déverrouillables par une rotation du poussoir par rapport au réservoir. Avantageusement, les moyens de verrouillage restent bloqués en position déverrouillée après qu'ils ont été déverrouillés. Les moyens peuvent être constitués par au moins un pont de matière cassable entre le poussoir et le réservoir.According to an embodiment which can be applied to any device of the general type referred to in the introduction, it comprises locking means which immobilize the pusher axially with respect to the reservoir. Advantageously, said locking means are unlockable by a rotation of the pusher relative to the reservoir. Advantageously, the locking means remain locked in the unlocked position after they have been unlocked. The means may consist of at least one bridge of breakable material between the pusher and the reservoir.

Selon une forme de réalisation qui peut s'appliquer à tout dispositif du type général visé en introduction, il comporte des moyens pour empêcher son actionnement involontaire. Avantageusement, il comporte au moins une zone de matière cassable qui forme une butée qui s'oppose à l'actionnement et qui est cassée lors de l'actionnement.According to an embodiment which can be applied to any device of the general type referred to in the introduction, it includes means for preventing its involuntary actuation. Advantageously, it comprises at least one zone of breakable material which forms a stop which opposes actuation and which is broken during actuation.

Selon une forme de réalisation qui peut s'appliquer à tout dispositif du type général visé en introduction, il comporte des moyens pour empêcher que le réservoir ne soit séparé du poussoir. Avantageusement, lesdits moyens comportent des moyens d'encliquetage qui sont en position encliquetée au moins lorsque le dispositif est dans sa position de repos. Avantageusement lesdits moyens d'encliquetage sont aussi en position encliquetée lorsque le dispositif est dans sa position de fin d'actionnement.According to an embodiment which can be applied to any device of the general type referred to in the introduction, it includes means for preventing the reservoir from being separated from the pusher. Advantageously, said means comprise latching means which are in the latched position at least when the device is in its rest position. Advantageously, said latching means are also in the latched position when the device is in its end of actuation position.

La présente invention a aussi pour objet un procédé de remplissage du dispositif susmentionné, comportant au moins les étapes suivantes :

  • introduction du dispositif dans une chambre à vide,
  • introduction dans le réservoir cylindrique d'un volume prédéterminé de produit,
  • mise sous vide de la chambre à vide,
  • fermeture sous vide du réservoir cylindrique,
caractérisé en ce que ledit volume prédéterminé de produit est mesuré par un moyen de mesure extérieur au dispositif de l'invention et ledit volume peut avoir une valeur quelconque inférieure ou égale au volume total dudit réservoir cylindrique.The present invention also relates to a method of filling the above-mentioned device, comprising at least the following steps:
  • introduction of the device into a vacuum chamber,
  • introduction into the cylindrical tank of a predetermined volume of product,
  • evacuating the vacuum chamber,
  • vacuum closure of the cylindrical tank,
characterized in that said predetermined volume of product is measured by a measurement means external to the device of the invention and said volume can have any value less than or equal to the total volume of said cylindrical tank.

D'autres caractéristiques et avantages de l'invention apparaîtront au cours de la description détaillée suivante de plusieurs formes de réalisation de l'invention, données à titre d'exemples non limitatifs, en regard des dessins joints.Other characteristics and advantages of the invention will appear during the following detailed description of several embodiments of the invention, given by way of nonlimiting examples, with reference to the accompanying drawings.

Sur les dessins :

  • la figure 1 est une vue en coupe longitudinale d'une forme de réalisation du dispositif selon l'invention, en position de stockage,
  • la figure 2 est une vue en perspective du dispositif de la figure 1,
  • la figure 3 est une vue de détail d'une partie du dispositif de la figure 1,
  • la figure 3A est une vue de dessous de la couronne 10 de la figure 3, selon la direction A de la figure 3,
  • la figure 3B est une vue similaire à la figure 3, représentant une variante du dispositif de l'invention,
  • la figure 4 est une vue partielle en coupe longitudinale du dispositif de la figure 1, en position de fin d'actionnement,
  • la figure 5 est une vue partielle en coupe longitudinale d'une variante du dispositif selon l'invention, en position de stockage,
  • la figure 6 est une vue partielle en coupe longitudinale d'une autre variante du dispositif selon l'invention, en position de stockage,
  • la figure 7 est une vue partielle en coupe longitudinale du dispositif de la figure 6, en position de fin d'actionnement,
  • la figure 8 est une vue en coupe similaire à celle de la figure 3, pour une variante de l'invention particulièrement adaptée aux configurations des figures 6 et 7,
  • la figure 9 est une vue partielle en coupe longitudinale d'une autre variante du dispositif selon l'invention, en position de fin d'actionnement,
  • la figure 10 est une vue de détall du dispositif de la figure 9,
  • la figure 11 est une vue en coupe d'une autre variante du dispositif selon l'invention,
  • la figure 12 est une vue schématique en coupe longitudinale d'une variante du dispositif de l'invention, en position de fin d'actionnement, la tige 4 et le piston 2 n'étant pas représentés,
  • la figure 13 est une vue de côté en coupe longitudinale du dispositif de la figure 12, en position de stockage,
  • la figure 14 est une vue en coupe selon la ligne A-A du dispositif de la figure 13,
  • la figure 15 est une vue de côté d'une autre variante du dispositif de l'invention,
  • la figure 16 est une vue partielle en coupe d'une autre variante du dispositif de l'invention, et
  • la figure 17 est une vue en coupe d'une autre variante du dispositif de l'invention.
In the drawings:
  • FIG. 1 is a view in longitudinal section of an embodiment of the device according to the invention, in the storage position,
  • FIG. 2 is a perspective view of the device of FIG. 1,
  • FIG. 3 is a detailed view of part of the device of FIG. 1,
  • FIG. 3A is a bottom view of the crown 10 of FIG. 3, in the direction A of FIG. 3,
  • FIG. 3B is a view similar to FIG. 3, showing a variant of the device of the invention,
  • FIG. 4 is a partial view in longitudinal section of the device of FIG. 1, in the end of actuation position,
  • FIG. 5 is a partial view in longitudinal section of a variant of the device according to the invention, in the storage position,
  • FIG. 6 is a partial view in longitudinal section of another variant of the device according to the invention, in the storage position,
  • FIG. 7 is a partial view in longitudinal section of the device in FIG. 6, in the end of actuation position,
  • FIG. 8 is a sectional view similar to that of FIG. 3, for a variant of the invention particularly suited to the configurations of FIGS. 6 and 7,
  • FIG. 9 is a partial view in longitudinal section of another variant of the device according to the invention, in the end of actuation position,
  • FIG. 10 is a detailed view of the device in FIG. 9,
  • FIG. 11 is a sectional view of another variant of the device according to the invention,
  • FIG. 12 is a schematic view in longitudinal section of a variant of the device of the invention, in the end of actuation position, the rod 4 and the piston 2 not being shown,
  • FIG. 13 is a side view in longitudinal section of the device of FIG. 12, in the storage position,
  • FIG. 14 is a sectional view along line AA of the device in FIG. 13,
  • FIG. 15 is a side view of another variant of the device of the invention,
  • FIG. 16 is a partial sectional view of another variant of the device of the invention, and
  • Figure 17 is a sectional view of another variant of the device of the invention.

Les figures 1 à 4 représentent une première forme de réalisation du dispositif selon l'invention. Ce dispositif est destiné à projeter une dose unique de produit fluide, généralement de l'ordre de quelques millilitres. Le dispositif de l'invention est donc de petite taille, et mesure quelques centimètres dans sa plus grande dimension. Il est généralement réalisé en matière plastique.Figures 1 to 4 show a first embodiment of the device according to the invention. This device is intended to project a single dose of fluid, generally of the order of a few milliliters. The device of the invention is therefore small, and measures a few centimeters in its largest dimension. It is generally made of plastic.

Comme représenté sur la figure 2, le dispositif selon l'invention comporte un poussoir 3 doté d'un embout de sortie 18 ayant une base élargie 19 à partir de laquelle s'étend radialement vers l'extérieur une surface d'appui 20 prolongée par une jupe 21. A l'intérieur de la jupe 21 est monté un corps de pompe 22 comportant des ailes d'appui 23 adaptées à coulisser dans ladite jupe 21. Le dispositif peut être actionné en étant tenu entre le pouce et un ou deux doigts, le pouce étant appliqué contre les ailes d'appui 23 et les autres doigts étant appliqués contre la surface d'appui 20. Pour faciliter l'actionnement, la jupe 21 comporte généralement un évidement 24 permettant le passage du pouce.As shown in Figure 2, the device according to the invention comprises a pusher 3 provided with an outlet nozzle 18 having an enlarged base 19 from which extends radially outward a support surface 20 extended by a skirt 21. Inside the skirt 21 is mounted a pump body 22 comprising support wings 23 adapted to slide in said skirt 21. The device can be actuated by being held between the thumb and one or two fingers , the thumb being applied against the support wings 23 and the other fingers being applied against the support surface 20. To facilitate actuation, the skirt 21 generally has a recess 24 allowing the passage of the thumb.

En référence à la figure 1, le corps de pompe 22 comporte un réservoir cylindrique 1 qui s'étend entre une extrémité ouverte 25 et un fond 16 doté d'un orifice de remplissage 26. L'orifice de remplissage 26 peut être fermé par une bille 27 emmanchée à force dans ledit orifice, ou par tout autre moyen de bouchage. Avantageusement, la jupe 21 du poussoir 3 comporte à son extrémité libre une lèvre intérieure d'encliquetage 28 qui permet de maintenir lesdites ailes d'appui 23 à l'intérieur de ladite jupe 21.With reference to FIG. 1, the pump body 22 comprises a cylindrical reservoir 1 which extends between an open end 25 and a bottom 16 provided with a filling orifice 26. The filling orifice 26 can be closed by a ball 27 force-fitted into said orifice, or by any other means of sealing. Advantageously, the skirt 21 of the pusher 3 has at its free end an internal snap-on lip 28 which makes it possible to maintain said support wings 23 inside said skirt 21.

La base élargie 19 de l'embout de sortie 18 est constituée par une paroi cylindrique 29 disposée autour du réservoir cylindrique 1, et qui s'étend entre la surface d'appui 20 et une paroi annulaire 9 qui elle-même s'étend radialement vers l'intérieur jusqu'à l'embout de sortie 18. L'embout de sortie 18 s'étend entre ladite paroi annulaire 9 et une extrémité de sortie 30 comportant un orifice de sortie 6. L'embout de sortie 18 est creux, et se prolonge sur une certaine distance à l'intérieur de la paroi cylindrique 29 de la base élargie 19, par une paroi cylindrique 7 qui s'étend jusqu'à une extrémité 8. Ainsi, l'embout de sortie 18 et la paroi cylindrique 7 délimitent un canal longitudinal 31 cylindrique, qui communique avec l'orifice de sortie 6.The enlarged base 19 of the outlet nozzle 18 is constituted by a cylindrical wall 29 arranged around the cylindrical tank 1, and which extends between the bearing surface 20 and an annular wall 9 which itself extends radially inwards to the outlet end piece 18. The outlet end piece 18 extends between said annular wall 9 and an outlet end 30 comprising an outlet opening 6. The outlet end piece 18 is hollow, and extends over a certain distance inside the cylindrical wall 29 of the enlarged base 19, by a cylindrical wall 7 which extends to one end 8. Thus, the outlet nozzle 18 and the cylindrical wall 7 define a cylindrical longitudinal channel 31 which communicates with the outlet orifice 6.

Une tige 4 également cylindrique est emmanchée à force dans le canal longitudinal 31. La tige 4 s'étend depuis une première extrémité 32 placée au contact de l'extrémité de sortie 30 de l'embout de sortie 18, jusqu'au delà de l'extrémité 8 de la paroi cylindrique 7, où ladite tige 4 se prolonge radialement vers l'extérieur par une couronne 10. La tige 4 comporte sur toute sa hauteur une ou plusieurs rainures externes 5 qui communiquent avec l'orifice de sortie 6, généralement par des rainures formées sur la première extrémité 32 de la tige 4, d'une façon bien connue.A rod 4 also cylindrical is force fitted into the longitudinal channel 31. The rod 4 extends from a first end 32 placed in contact with the outlet end 30 of the outlet nozzle 18, up to beyond end 8 of the cylindrical wall 7, where said rod 4 is extended radially outward by a ring 10. The rod 4 has over its entire height one or more external grooves 5 which communicate with the outlet orifice 6, generally by grooves formed on the first end 32 of the rod 4, in a well known manner.

Le dispositif de l'invention comporte en outre un piston 2 qui coulisse dans le réservoir cylindrique 1, et qui peut coulisser sur la paroi cylindrique 7 du poussoir entre la couronne 10 et la paroi annnulaire 9 formant butée. Dans l'exemple représenté sur la figure 1, le piston 2 comporte un manchon interne 11 qui s'étend jusqu'à une extrémité libre 43 proche de la paroi annulaire 9 du poussoir, et qui coulisse sur la paroi cylindrique 7 du poussoir. En outre, le piston 23 comporte une jupe externe 33 qui coulisse de façon étanche dans le réservoir cylindrique 1.The device of the invention further comprises a piston 2 which slides in the cylindrical tank 1, and which can slide on the cylindrical wall 7 of the pusher between the ring 10 and the annular wall 9 forming a stop. In the example shown in FIG. 1, the piston 2 includes an internal sleeve 11 which extends to a free end 43 close to the annular wall 9 of the pusher, and which slides on the cylindrical wall 7 of the pusher. In addition, the piston 23 has an outer skirt 33 which slides in leaktight manner in the cylindrical tank 1.

La figure 3 représente en détail la structure du piston 2 et de la couronne 10. La couronne 10 comporte un nervure annulaire 12 dirigée vers le piston, et le piston 2 comporte une gorge annulaire 13 disposée en regard de la nervure annulaire 12. La gorge annulaire 13 du piston est délimitée extérieurement par une lèvre extérieure périphérique d'étanchéité 34 de la jupe 33, qui coulisse en contact étanche dans le réservoir cylindrique 1, et par une nervure 14. La couronne 10 comporte en outre une gorge 15 adaptée à recevoir ladite nervure 14. Lorsque le piston 2 est dans une position de stokage, comme représenté sur la figure 3, la nervure annulaire 12 de la couronne 10 est emmanchée à force dans la gorge annulaire 13 du piston, et coincée entre la lèvre d'étanchéité 4 et la nervure 14 du piston. Lors du montage du dispositif, le piston 2 est d'abord assemblé sur la couronne 10 par emmanchement de la nervure annulaire 12 dans la gorge 13. Puis la tige 4 est emmanchée à force dans le canal longitudinal 31 du poussoir et le piston 2 est introduit dans le réservoir cylindrique 1. Pour faciliter cette introduction, le réservoir cylindrique 1 comporte avantageusement un chanfrein intérieur 41 à son extrémité ouverte. Lorsque la lèvre d'étanchéité 34 est introduite dans le chanfrein 41, elle est progressivement déformée radialement vers l'intérieur, de sorte quelle vient serrer la nervure 12 qui se trouve ainsi comprimée entre la nervure 14 et la lèvre 34.FIG. 3 represents in detail the structure of the piston 2 and of the crown 10. The crown 10 comprises an annular rib 12 directed towards the piston, and the piston 2 comprises an annular groove 13 disposed opposite the annular rib 12. The groove annular 13 of the piston is delimited externally by an outer peripheral sealing lip 34 of the skirt 33, which slides in sealed contact in the cylindrical tank 1, and by a rib 14. The crown 10 further comprises a groove 15 adapted to receive said rib 14. When the piston 2 is in a storage position, as shown in FIG. 3, the annular rib 12 of the crown 10 is force fitted into the annular groove 13 of the piston, and wedged between the sealing lip 4 and the rib 14 of the piston. When mounting the device, the piston 2 is first assembled on the crown 10 by fitting the annular rib 12 into the groove 13. Then the rod 4 is force-fitted into the longitudinal channel 31 of the pusher and the piston 2 is introduced into the cylindrical reservoir 1. To facilitate this introduction, the cylindrical reservoir 1 advantageously comprises an internal chamfer 41 at its end opened. When the sealing lip 34 is introduced into the chamfer 41, it is gradually deformed radially inwards, so that it comes to tighten the rib 12 which is thus compressed between the rib 14 and the lip 34.

Dans l'exemple particulier représenté sur les figures 3 et 3A, le contact entre la lèvre 34 et la nervure 12 n'est pas étanche, puisque la couronne 40 comporte une ou plusieurs fentes 40 à sa périphérie extérieure, qui font communiquer le réservoir de produit 1 avec la gorge 13 du piston. Dans cet exemple, l'étanchéité ente le piston, 2 et la couronne 10 est assurée par le contact entre la nervure 14 et la gorge 15. Cette étanchéité est renforcée par le serrage radial dû à la lèvre d'étanchéité 34, qui applique la nervure 12 entre la nervure 14. Ainsi, la nervure 14 est-elle aussi coincée dans la gorge 15, et participe au coincement du piston 2 sur la couronne 10.In the particular example shown in FIGS. 3 and 3A, the contact between the lip 34 and the rib 12 is not sealed, since the crown 40 has one or more slots 40 at its outer periphery, which make the reservoir of product 1 with groove 13 of the piston. In this example, the seal between the piston 2 and the crown 10 is ensured by the contact between the rib 14 and the groove 15. This seal is reinforced by the radial tightening due to the sealing lip 34, which applies the rib 12 between the rib 14. Thus, the rib 14 is also wedged in the groove 15, and participates in the wedging of the piston 2 on the crown 10.

Bien qu'elles soient avantageuses pour des raisons qui seront vues ci-dessous, les fentes 40 peuvent être supprimées.Although they are advantageous for reasons which will be seen below, the slots 40 can be omitted.

Eventuellement, comme représenté sur la figure 3B, le coincement et l'étanchéité entre le piston 2 et la couronne 10 pourraient être assurés par le contact entre la lèvre d'étanchéité 34 et la couronne 10, à condition que ladite couronne 10 ne comporte plus de fentes 40. Il n'est alors plus nécessaire de prévoir de nervure ou de rainure sur le piston 2 ou la couronne 10.Optionally, as shown in FIG. 3B, the wedging and sealing between the piston 2 and the crown 10 could be ensured by the contact between the sealing lip 34 and the crown 10, provided that said crown 10 no longer comprises slots 40. It is then no longer necessary to provide a rib or groove on the piston 2 or the crown 10.

Lorsqu'un utilisateur tient le dispositif entre le pouce et deux doigts, et appuie simultanément sur les ailes d'appui 23 du corps de pompe 22 et sur la surface d'appui 20 du poussoir 3, le piston 2 a tendance à descendre avec le poussoir 3 vers le fond 16 du réservoir cylindrique 1. Le produit contenu dans le réservoir cylindrique 1 est généralement incompressible, de sorte que la pression dudit produit augmente sans déplacement sensible du poussoir 3 par rapport au corps de pompe 22. Cette pression exerce sur le piston 2 une force qui tend à l'éloigner du fond 16 du réservoir cylindrique 1. Lorsque la couronne 10 comporte les fentes 41 de la figure 3, la pression du produit s'exerce sur une surface de piston plus importante, et donc la force appliquée au piston par ladite pression est d'autant plus grande, ce qui facilite le décoincement du piston 2. Lorsque cette force est suffisante pour désolidariser le piston 2 de la couronne 10, le piston 2 est repoussé vers le haut tandis que le poussoir 3, avec la tige 4 et la couronne 10, commence à descendre vers le fond 16 du réservoir cylindrique 1. De cette façon, le manchon interne 11 du piston 2 est repoussé en butée contre la paroi annnulaire 9 du poussoir 3, et un espace 35 est créé entre le piston 2 et la couronne 10, comme représenté sur la figure 4. Lorsque le manchon 11 est appliqué en butée contre la paroi annulaire 9 sous l'effet de la pression régnant dans le réservoir de produit 1 et du frottement entre le piston 2 et ledit réservoir 1, le contact entre le manchon 11 et la paroi annulaire 9 est étanche. Avantageusement, la paroi annulaire 9 comporte une surface annulaire 42, bien visible sur la figure 4A, entourant la paroi cyllindrique 7 et formant un angle aigu avec ladite paroi cylindrique 7. L'extrémité libre 43 du manchon 11 bute contre cette surface 42, de sorte que par effet de coin, la surface 42 déforme l'extrémité libre 43 du manchon 11 radialement vers l'intérieur, et l'applique contre la paroi cylindrique 7 du poussoir. En outre, cette déformation s'accompagne d'une pression importante appliquée par la surface 42 sur le manchon 11. Ainsi, l'extrémité libre 43 du manchon 11 est en contact étanche avec d'une part la surface 42 annulaire, et d'autre part avec la paroi cylindrique 7.When a user holds the device between the thumb and two fingers, and simultaneously presses on the support wings 23 of the pump body 22 and on the support surface 20 of the plunger 3, the piston 2 tends to descend with the pusher 3 towards the bottom 16 of the cylindrical reservoir 1. The product contained in the cylindrical reservoir 1 is generally incompressible, so that the pressure of said product increases without appreciable displacement of the pusher 3 relative to the pump body 22. This pressure exerts on the piston 2 a force which tends to move it away from the bottom 16 of the cylindrical reservoir 1. When the crown 10 has the slots 41 of FIG. 3, the pressure of the product is exerted on a larger surface of the piston, and therefore the force applied to the piston by said pressure is all the greater, which facilitates the loosening of the piston 2. When this force is sufficient to separate the piston 2 from the crown 10, the piston 2 is pushed upward t while the pusher 3, with the rod 4 and the crown 10, begins to descend towards the bottom 16 of the cylindrical tank 1. In this way, the internal sleeve 11 of the piston 2 is pushed into abutment against the annular wall 9 of the pusher 3, and a space 35 is created between the piston 2 and the crown 10, as shown in FIG. 4. When the sleeve 11 is applied in abutment against the annular wall 9 under the effect of the pressure prevailing in the product tank 1 and friction between the piston 2 and said reservoir 1, the contact between the sleeve 11 and the annular wall 9 is sealed. Advantageously, the annular wall 9 has an annular surface 42, although visible in Figure 4A, surrounding the cylindrical wall 7 and forming an acute angle with said cylindrical wall 7. The free end 43 of the sleeve 11 abuts against this surface 42, so that by wedge effect, the surface 42 deforms the free end 43 of the sleeve 11 radially inward, and applies it against the cylindrical wall 7 of the pusher. In addition, this deformation is accompanied by a significant pressure applied by the surface 42 on the sleeve 11. Thus, the free end 43 of the sleeve 11 is in sealed contact with on the one hand the annular surface 42, and on the other hand with the cylindrical wall 7.

L'espace 35 met en communication le réservoir cylindrique 1 avec les rainures 5 de la tige 4, de sorte que le produit contenu dans ledit réservoir cylindrique 1 peut être explusé par le passage 35, les rainures 5 et l'orifice de sortie 6, tandis que le piston 2 et la couronne 10 descendent dans ledit réservoir cylindrique 1, en direction du fond 16. Ce mouvement s'arrête lorsque la couronne 10 arrive en butée contre ledit fond 16. Avantageusement, la couronne 10 comporte une face 17 dirigée vers le fond 16 qui a une forme sensiblement complémentaire de celle dudit fond 16 et de la bille 27, de sorte que lorsque la couronne 10 est en butée contre le fond 16, sensiblement tout le produit contenu dans le réservoir cylindrique 1 a été expulsé. On limite ainsi la perte d'une partie du produit contenu dans le réservoir cylindrique, ce qui est particulièrement utile lorsque le produit est coûteux, ou lorsque son usage est réglementé (cas des médicaments à base de drogues prohibées)
   La figure 5 représente une variante du dispositif de la figure 1, dans laquelle un moyen élastique tel qu'un ressort hélicoïdal 36 est disposé entre la paroi annulaire du poussoir 3 et le piston 2, de façon à solliciter élastiquement le piston 2 vers la couronne 10. Cette variante peut être utile notamment dans le cas où le volume de la dose à projeter est relativement important, et où la course du piston 2 dans le réservoir cylindrique 1 est relativement importante. En effet, il pourrait être possible alors qu'un utilisateur interrompe ou ralentisse le mouvement du piston 2 dans le réservoir cylindrique 1 pendant la course dudit piston 2. Dans ce cas, la pression à l'intérieur du réservoir cylindrique 1 diminue, de sorte que le ressort hélicoïdal 36 répousse le piston 2 vers la couronne 10, en isolant à nouveau le réservoir cylindrique 1 des rainures de sortie 5. Le piston 2 ne se sépare ensuite de la couronne 10 que lorsque la pression dans le réservoir cylindrique 1 est redevenue suffisante pour vaincre la force du ressort 36. On garantit ainsi une pulvérisation fine du produit en sortie du dispositif. En outre, le ressort hélicoïdal 36 renforce le coincement du piston 2 sur la couronne 10 lorsque ledit piston est dans sa position de stockage.
The space 35 places the cylindrical reservoir 1 in communication with the grooves 5 of the rod 4, so that the product contained in said cylindrical reservoir 1 can be expelled through the passage 35, the grooves 5 and the outlet orifice 6, while the piston 2 and the crown 10 descend into said cylindrical reservoir 1, towards the bottom 16. This movement stops when the crown 10 abuts against said bottom 16. Advantageously, the crown 10 has a face 17 directed towards the bottom 16 which has a shape substantially complementary to that of said bottom 16 and of the ball 27, so that when the crown 10 is in abutment against the bottom 16, substantially all of the product contained in the cylindrical tank 1 has been expelled. This limits the loss of part of the product contained in the cylindrical tank, which is particularly useful when the product is expensive, or when its use is regulated (case of drugs based on prohibited drugs)
FIG. 5 represents a variant of the device of FIG. 1, in which an elastic means such as a helical spring 36 is disposed between the annular wall of the pusher 3 and the piston 2, so as to elastically urge the piston 2 towards the crown 10. This variant can be useful in particular in the case where the volume of the dose to be projected is relatively large, and where the stroke of the piston 2 in the cylindrical reservoir 1 is relatively large. Indeed, it could be possible while a user interrupts or slows down the movement of the piston 2 in the cylindrical tank 1 during the stroke of said piston 2. In this case, the pressure inside the cylindrical tank 1 decreases, so that the helical spring 36 pushes the piston 2 towards the crown 10, again isolating the cylindrical reservoir 1 from the outlet grooves 5. The piston 2 then does not separate from the crown 10 until the pressure in the cylindrical reservoir 1 has again become sufficient to overcome the force of the spring 36. This guarantees a fine spraying of the product at the outlet of the device. In addition, the helical spring 36 reinforces the jamming of the piston 2 on the crown 10 when said piston is in its storage position.

Les figures 6 et 7 représentent une autre variante du dispositif de l'invention, dans laquelle le manchon interne 11 du piston 2 est placé en butée contre la paroi annulaire 9, lorsque le piston est dans sa position de stockage. Ainsi, le déplacement du piston vers sa position d'actionnement, comme représenté sur la figure 7, se fait par déformation d'une partie du manchon interne 11 du piston, radialement vers l'extérieur, au voisinage de la paroi annulaire 9 du poussoir.Figures 6 and 7 show another variant of the device of the invention, in which the internal sleeve 11 of the piston 2 is placed in abutment against the annular wall 9, when the piston is in its storage position. So the displacement of the piston towards its actuating position, as shown in Figure 7, is by deformation of a portion of the inner sleeve 11 of the piston, radially outward, in the vicinity of the annular wall 9 of the pusher.

Dans cette variante des figures 6 et 7, il est particulièrement avantageux que la couronne 10 comporte une surface cylindrique 44 sur laquelle coulisse avec étanchéité une partie cylindrique complémentaire du piston. Si on appelle h la hauteur de la surface cylindrique 44, le piston 2 doit s'éloigner de la couronne 10 de la distance h avant de libérer le passage entre le réservoir de produit 1 et les rainures de sortie 5. Cette distance h parcourue par le piston correspond à une compression prédéterminée du manchon 11 qui elle-même correspond à une force prédéterminée exercée par le manchon 11 sur le piston 2 : ainsi, on assure que le produit n'est expulsé que si la pression à l'intérieur du réservoir 1 atteint une valeur prédéterminée, et donc ledit produit est pulvérisé finement.In this variant of FIGS. 6 and 7, it is particularly advantageous for the ring 10 to have a cylindrical surface 44 on which a complementary cylindrical part of the piston slides with sealing. If the height of the cylindrical surface 44 is called h, the piston 2 must move away from the crown 10 by the distance h before freeing the passage between the product reservoir 1 and the outlet grooves 5. This distance h traveled by the piston corresponds to a predetermined compression of the sleeve 11 which itself corresponds to a predetermined force exerted by the sleeve 11 on the piston 2: thus, it is ensured that the product is only expelled if the pressure inside the tank 1 reaches a predetermined value, and therefore said product is sprayed finely.

La figure 9 représente une variante du dispositif des figures 6 et 7, dans laquelle le manchon interne 11 du piston comporte des fentes longitudinales 37 qui s'étendent sur une partie de sa longueur au voisinage de la paroi annulaire 9 du poussoir 3, de façon à faciliter la déformation dudit manchon interne 11.FIG. 9 represents a variant of the device of FIGS. 6 and 7, in which the internal sleeve 11 of the piston has longitudinal slots 37 which extend over part of its length in the vicinity of the annular wall 9 of the pusher 3, so to facilitate the deformation of said internal sleeve 11.

Dans la variante de la figure 9, l'étanchéité entre le piston 2 et le poussoir ne peut plus être assurée au niveau de la paroi annulaire 9. Il est alors possible de réaliser une lèvre d'étanchéité périphérique 45 entre la manchon 11 du piston et la paroi cylindrique 7 du poussoir, comme représenté sur la figure 10. Cette lèvre 45 pourra être formée par exemple à l'intérieur du manchon 11, mais pourrait auusi être formée à l'extérieur de la paroi cylindrique 7. On notera que les variantes décrites ci-dessus du dispositif de l'invention pourraient aussi être équipées de la lèvre d'étanchéité 45, en remplacement de l'étanchéité par butée du manchon 11 contre la paroi 9.In the variant of FIG. 9, the seal between the piston 2 and the pusher can no longer be ensured at the level of the annular wall 9. It is then possible to produce a peripheral sealing lip 45 between the sleeve 11 of the piston and the cylindrical wall 7 of the pusher, as shown in FIG. 10. This lip 45 could be formed for example inside the sleeve 11, but could also be formed outside the cylindrical wall 7. It will be noted that the variants described above of the device of the invention could also be equipped with the sealing lip 45, replacing the sealing by abutment of the sleeve 11 against the wall 9.

Le dispositif de l'invention peut être rempli de produit selon le procédé suivant :

  • introduction du dispositif dans une chambre à vide, l'orifice 26 du réservoir 1 étant dirigé vers le haut,
  • mise sous vide de la chambre à vide,
  • introduction dans le réservoir cylindrique 1 d'un volume de produit mesuré par un moyen de mesure extériuer, ledit volume étant inférieur au volume total dudit réservoir cylindrique 1, et
  • bouchage sous vide de l'orifice 26.
The device of the invention can be filled with product according to the following method:
  • introduction of the device into a vacuum chamber, the orifice 26 of the reservoir 1 being directed upwards,
  • evacuating the vacuum chamber,
  • introduction into the cylindrical tank 1 of a volume of product measured by external measuring means, said volume being less than the total volume of said cylindrical tank 1, and
  • orifice 26 vacuum sealing.

L'étape de mise sous vide de la chambre à vide peut être placée après l'étape d'introduction dans le réservoir 1 d'un volume de produit mesuré extérieurement.The step of evacuating the vacuum chamber can be placed after the step of introducing into the reservoir 1 a volume of product measured externally.

Ainsi, le volume de produit introduit dans le réservoir 1 est choisi entre 0 et un volume maximal. Ceci est particulièrement avantageux dans la mesure où un même dispositif de pulvérisation selon l'invention peut servir à contenir des doses de produits diverses, ce qui permet de produire en plus grandes séries et donc à moindre coût. Après le bouchage de l'orifice 26 et la sortie de la chambre à vide, si le volume de produit est inférieur au volume total du réservoir 1, le piston 2 coulisse dans le réservoir 1 sous l'effet de la pression atmosphérique extérieure, jusqu'à ce que le volume intérieur du réservoir 1 devienne sensiblement égal au volume de produit qu'il contient.Thus, the volume of product introduced into the tank 1 is chosen between 0 and a maximum volume. This is particularly advantageous insofar as the same spraying device according to the invention can be used to contain doses of products various, which makes it possible to produce in larger series and therefore at a lower cost. After plugging the orifice 26 and leaving the vacuum chamber, if the product volume is less than the total volume of the tank 1, the piston 2 slides in the tank 1 under the effect of the atmospheric pressure outside, up to 'that the interior volume of the tank 1 becomes substantially equal to the volume of product it contains.

Comme représenté sur la figure 11, la base élargie 19 de l'embout 18 peut comporter des fentes 46, qui permettent de régler précisément la position du réservoir 1 par rapport au piston 2, afin de fixer précisément le volume maximal de produit qui peut être contenu dans ledit réservoir 1.As shown in FIG. 11, the enlarged base 19 of the end piece 18 may include slots 46, which make it possible to precisely adjust the position of the reservoir 1 relative to the piston 2, in order to precisely fix the maximum volume of product which can be contained in said tank 1.

En outre, les fentes 46 permettent d'appuyer sur le piston 2 et non sur le poussoir 3 pendant la mise en place dudit piston dans le réservoir cylindrique 1. On évite ainsi que le piston 2 ne quitte sa position de stockage lors de sa mise en place, du fait du frottement entre ledit piston et le réservoir cylindrique 1.In addition, the slots 46 make it possible to press the piston 2 and not the pusher 3 during the positioning of said piston in the cylindrical tank 1. This prevents the piston 2 from leaving its storage position when it is put in place, due to the friction between said piston and the cylindrical tank 1.

Avantageusement, l'orifice 26 du fond 16 peut être prolongé vers l'extérieur par un conduit 47 doté de fentes longitudinales 48. Ainsi, la bille 27 peut être introduite partiellement dans le conduit 48 sans boucher l'orifice 26, qui communique alors avec l'extérieur par les fentes 48. L'industriel qui remplit le réservoir 1, qui est généralement différent de celui qui a réalisé le dispositif, n'a alors plus qu'à enfoncer la bille 27 jusqu'à l'orifice 26 pour boucher ledit orifice après le remplissage du réservoir 1.Advantageously, the orifice 26 of the bottom 16 can be extended towards the outside by a conduit 47 provided with longitudinal slots 48. Thus, the ball 27 can be partially introduced into the conduit 48 without blocking the orifice 26, which then communicates with outside by the slots 48. The manufacturer who fills the tank 1, which is generally different from the one who produced the device, then only has to push the ball 27 up to the orifice 26 to plug said orifice after filling of reservoir 1.

Sur les figures 12 à 14, on a représenté une variante de l'invention qui vise à garantir plus sûrement le maintien du dispositif dans sa position de stockage. Pour plus de clareté, le piston 2 n'est pas représenté, pas plus que la tige 4 et la couronne 10. Pour cela, le réservoir 1 comporte deux rainures 100 dans un plan perpendiculaire à l'axe du dispositif, et chaque rainure 100 communique à une extrémité avec une rainure axiale 101 qui s'éloigne du poussoir 3. D'autre part, le poussoir 3 comporte deux bras élastiques 102 sensiblement axiaux, qui s'étendent chacun jusqu'à une extrémité libre dotée d'un ergot 103 qui dans la position de repos, pénètre dans une rainure 100 à son extrémité qui ne communique pas avec une rainure axiale 101. En position de repos, le poussoir 3 est donc immobilisé axialement, par rapport au réservoir 1. Pour actionner le dispositif, on tourne le poussoir 3 par rapport au réservoir 1 d'environ un quart de tour, jusqu'à ce que les ergots 103 se trouvent en face des rainures axiales 101.In FIGS. 12 to 14, a variant of the invention is shown which aims to guarantee more securely that the device is kept in its storage position. For clarity, the piston 2 is not shown, any more than the rod 4 and the crown 10. For this, the reservoir 1 has two grooves 100 in a plane perpendicular to the axis of the device, and each groove 100 communicates at one end with an axial groove 101 which moves away from the pusher 3. On the other hand, the pusher 3 comprises two elastic arms 102 substantially axial, which each extend to a free end provided with a lug 103 which in the rest position, enters a groove 100 at its end which does not communicate with an axial groove 101. In the rest position, the pusher 3 is therefore immobilized axially, relative to the reservoir 1. To actuate the device, turns the pusher 3 relative to the reservoir 1 by about a quarter of a turn, until the lugs 103 are in front of the axial grooves 101.

Au cours de ce mouvement de rotation, les bras élastiques 102 sont repoussés radialement vers l'intérieur par des rampes 110 formées dans le fond des rainures 100, et les ergots s'encliquètent en fin de rotation dans les rainures axiales 101; de sorte que le poussoir ne peut plus être replacé dans sa position de stockage. Ainsi, on peut voir facilement si un dispositif a déjà été utilisé.During this rotational movement, the elastic arms 102 are pushed radially inward by ramps 110 formed in the bottom of the grooves 100, and the lugs snap at the end of rotation in the axial grooves 101; so that the pusher can no longer be returned to its storage position. This makes it easy to see if a device has already been used.

Sur la figure 15, on réalise un point de soudure 104 entre le poussoir 3 et le réservoir 1, afin de garantir que les deux pièces ne bougent pas l'une par rapport à l'autre pendant le stockage ou le transport, et pour mettre en évidence toute ouverture du dispositif ou tout actionnement du dispositif, le point de soudure 104 étant rompu lors de l'ouverture ou de l'actionnement.In FIG. 15, a welding point 104 is produced between the pusher 3 and the reservoir 1, in order to guarantee that the two parts do not move relative to each other during storage or transport, and to put clearly any opening of the device or any actuation of the device, the weld point 104 being broken during the opening or actuation.

Sur la figure 16, le dispositif comporte une sécurité anti-ouverture qui consiste en des ergots 105 élastiques encliquetés dans des orifices 106 du poussoir lorsque le dispositif est dans sa position de stockage. Les ergots possèdent une face 105a inférieure dont la normale est dirigée axialement en s'éloignant de la sortie 30 du poussoir 3, et une face inclinée 105b supérieure dont la normale a une composante axiale dirigée vers l'embout 18 et une composante radiale dirigée vers l'extérieur. La face inférieure 105a bute contre la paroi du poussoir en empêchant de retirer le réservoir 1, tandis que lorsqu'on sollicite le réservoir 1 vers la sortie 30 du poussoir, la face inclinée 105b repousse radialement vers l'intérieur l'ergot 105 et le dégage de l'orifice 106, ce qui permet l'actionnement. Avantageusement, le poussoir 3 comporte en outre des orifices 107 dans lesquels s'engagent les ergots 105 lorsque le dispositif est dans sa position de fin d'actionnement, de façon que le réservoir 1 ne puisse pas être ouvert pour être rempli à nouveau. Dans ce cas, il est avantageux que le réservoir 1 soit guidé dans son mouvement axial par rapport au poussoir 3, de façon que les ergots 105 pénètrent à coup sûr dans les orifices 107.In FIG. 16, the device comprises an anti-opening security which consists of elastic lugs 105 snapped into orifices 106 in the pusher when the device is in its storage position. The pins have a lower face 105a whose normal is directed axially away from the outlet 30 of the pusher 3, and an inclined upper face 105b whose normal has an axial component directed towards the end piece 18 and a radial component directed towards outside. The lower face 105a abuts against the wall of the pusher while preventing the reservoir 1 from being removed, while when the reservoir 1 is urged towards the outlet 30 of the pusher, the inclined face 105b pushes the lug 105 and the emerges from the orifice 106, which allows actuation. Advantageously, the pusher 3 further comprises orifices 107 in which the lugs 105 engage when the device is in its end of actuation position, so that the reservoir 1 cannot be opened to be refilled. In this case, it is advantageous for the reservoir 1 to be guided in its axial movement relative to the pusher 3, so that the pins 105 certainly penetrate into the orifices 107.

Sur la figure 17, le poussoir 3 comporte des pastilles détachables 108 et le réservoir 1 comporte des tiges axiales 109 en correspondance, qui poinçonnent les pastilles 108 en les détachant du poussoir 3 lors de l'actionnement. On évite ainsi un actionnement intempestif pendant le stockage ou le transport, et le détachement des pastilles 108 met en évidence le fait que le dispositif a déjà été actionné.In Figure 17, the pusher 3 has detachable pads 108 and the reservoir 1 has axial rods 109 in correspondence, which punch the pellets 108 by detaching them from the pusher 3 during actuation. This avoids inadvertent actuation during storage or transport, and the detachment of the pellets 108 highlights the fact that the device has already been actuated.

Claims (27)

  1. A device for spraying a single dose of a fluid in divided form, the device comprising at least:
    - a cylindrical tank (1) containing said dose of fluid;
    - a piston (2) slidable in said cylindrical tank (1);
    - a pusher (3, 4) for actuating the piston (2); and
    - an outlet passage (5, 6) capable of communicating with said cylindrical tank (1),
    characterized in that said piston (2) is slidably mounted on said pusher (3, 4) and is displaceable relative to said pusher (3, 4) between a storage position (Figure 1) in which it prevents communication between said outlet passage (5, 6) and said cylindrical tank (1), and an actuation position (Figure 4) in which it puts said outlet passage (5, 6) into communication with the cylindrical tank (1), the piston being placed so that a pressure obtaining in the cylindrical tank (1) attracts the piston (2) towards its actuation position, and the piston (2) is held in its storage position by wedging, on the pusher (3, 4), and can be displaced towards its actuation position only if the pressure that obtains inside the cylindrical tank (1) is sufficient for unwedging it, said pressure being obtained by pushing on the pusher (3, 4).
  2. A device according to claim 1, further characterized in that the pusher (3,4) comprises a cylindrical portion (7) that extends between an end (8) close to the cylindrical tank (1) and an abutment (9) that is further from the cylindrical tank (1), said end (8) close to the fluid tank is secured to a ring (10), said fluid outlet passage (5, 6) is disposed at least in part inside said cylindrical portion (7) of the pusher, said fluid outlet passage opens out from said cylindrical portion (7) between said ring (10) and said abutment (9) in the vicinity of said ring (10), the piston includes an internal sleeve (11) that slides over said cylindrical portion (7) of the pusher, and said piston (2) is in sealing contact with said ring (10) while in the storage position.
  3. A device according to claim 2, further characterized in that the piston (2) includes an outside peripheral sealing lip (34) which slides in sealed manner inside the cylindrical tank (1) and which is wedged between said tank (1) and the ring (10) when the piston (2) is in its storage position.
  4. A device according to claim 3, further characterized in that the ring (10) includes an annular rib (12) extending towards the piston (2), the piston includes an annular groove (13) adapted to receive the rib (12) of the ring, the piston (2) includes an annular rib (14) directed towards the ring (10) and inside said annular groove (13), and the ring (10) includes an annular groove (15) adapted to receive the annular rib (14) of the piston (2).
  5. A device according to claim 4, further characterized in that the ring (10) includes at least one passage (40) putting the tank (1) into communication with the groove (13) of the piston (2) when said piston (2) is in its storage position, and in that the rib (14) of the piston is in sealing contact with the groove (15) of the ring (10).
  6. A device according to any one of claims 2 to 5, further characterized in that the cylindrical tank (1) includes an end wall (16), and the ring (10) includes a face (17) facing towards said end wall (16) and substantially complementary in shape to said end wall (16), and in that said face (17) of the ring (10) comes into abutment against said end wall (16) at the end of the stroke of the piston (2), such that substantially all of the fluid contained in the tank (1) is expelled (Figure 4).
  7. A device according to any one of claims 2 to 6, further characterized in that the piston (2) is urged towards its storage position by resilient means (36, 11).
  8. A device according to any one of claims 2 to 7, further characterized in that internal sleeve (11) of the piston (2) presses against the abutment (9) of the pusher (3, 4) when the piston (2) is in its storage position, and the displacement of the piston (2) towards its actuation position takes place by deformation of at least a portion of the internal sleeve (11) (Figures 7 and 8).
  9. A device according to any one of claims 2 to 8, further characterized in that the sleeve (11) is pressed in sealed contact against said abutment (9) when the piston is in its actuation position.
  10. A device according to claim 9, further characterized in that said abutment (9) includes a concave annular surface (42) surrounding the cylindrical wall (7) with its concave side facing towards the sleeve (11), and in that said concave annular surface (42) deforms radially towards the inside of a free end (43) of said sleeve (11) when the piston (2) is in its actuation position.
  11. A device according to claim 8, further characterized in that the internal sleeve (11) of the piston (2) includes longitudinal slits (37) over a fraction of its length in the vicinity of said abutment (9) of the pusher (3, 4) so as to facilitate deformation of said internal sleeve (11) (Figure 8).
  12. A device according to any one of claims 2 to 11, further characterized in that the sleeve (11) of the piston (2) slides in sealed manner over the cylindrical wall (7) of the pusher.
  13. A device according to any one of claims 2 to 12, further characterized in that the piston (2) includes a cylindrical portion (14) which slides over a complementary cylindrical portion (15) of the ring (10) while continuing to interrupt communication between the cylindrical tank (1) and the fluid outlet passage (5, 6) so long as the piston (2) has not moved away from the ring (10) by a predetermined distance (h).
  14. A device according to any preceding claim, further characterized in that the cylindrical fluid tank (1) includes a filler orifice (26) suitable for receiving a plugging bead (27), and said orifice (26) is extended towards the outside of the tank (1) by a duct (47) provided with longitudinal slits (48), said bead (27) being capable of being received as a force-fit inside said duct (47) in an intermediate position where it allows the tank (1) to communicate with the outside via said longitudinal slits (48).
  15. A method of filling a device according to any one of claims 1 to 14, and including at least the following steps:
       the device is placed in a vacuum chamber and is kept under a vacuum;
       a predetermined volume of fluid is inserted in the cylindrical tank (1); and
       the cylinder tank (1) is closed under a vacuum;
    characterized in that said predetermined volume of fluid is measured by measurement means external to the device of the invention and may have any value that is not greater than the total volume of said cylindrical tank (1).
  16. A method of filling a device according to any one of claims 1 to 14, and comprising at least the following steps:
       the device is placed in a vacuum chamber;
       a predetermined volume of fluid is inserted in the cylindrical tank (1);
       the vacuum chamber is evacuated; and
       the cylindrical tank (1) is closed under vacuum;
    characterized in that said predetermined volume of fluid is measured by measurement means external to the device of the invention and may be of any value that is not greater than the total volume of said cylindrical tank (1).
  17. A device according to claim 1, further characterized in that it includes resilient means (36, 11) urging the piston (2) towards its closure position.
  18. A device according to claim 2, further characterized in that at rest said piston (2) is in sealing contact with said ring (10) around a peripheral line close to the cylindrical wall of the tank (1) so that only a radially outer portion of the piston is initially exposed to the pressure that obtains inside the tank (1), such that the section of the piston (2) which is exposed to the pressure that obtains inside the tank increases suddenly when the piston (2) separates from the ring (10), thereby encouraging clean opening of communication between the tank (1) and the outlet passage (5, 6).
  19. A device according to any one of the claims 1 to 14 and 17, 18) further characterized in that it includes locking means that prevent the pusher (3) from moving axially relative to the tank (1).
  20. A device according to claim 19, further characterized in that said locking means (100, 103) are unlockable by rotating the pusher (3) relative to the tank (1).
  21. A device according to claim 20, further characterized in that the locking means (100, 103) remain blocked in the unlocked position after they have been unlocked.
  22. A device according to claim 19, further characterized in that said locking means are constituted by at least one breakable bridge of material (104) between the pusher (3) and the tank (1).
  23. A device according to any one of claims 1 to 14 and 17, 18, further characterized in that it includes means for preventing involuntary actuation thereof.
  24. A device according to claim 23, further characterized in that it includes at least one zone of breakable material (108) that forms an abutment opposing actuation and that is broken during actuation.
  25. A device according to any one of claims 1 to 14 and 17, 18, further characterized in that it includes means for preventing the tank (1) from being separated from the pusher (3).
  26. A device according to claim 25, further characterized in that said means include snap-fastening means (105) that are in the snap-fastened position at least while the device is in its rest position.
  27. A device according to claim 26, further characterized in that said snap-fastening means are also in the snap-fastened position when the device in its end-of-actuation position.
EP92913803A 1991-06-26 1992-06-25 Device for dispensing a predetermined dose of fluid product, and method of filling thereof Expired - Lifetime EP0591365B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR9107854 1991-06-26
FR9107854A FR2678243B3 (en) 1991-06-26 1991-06-26 DEVICE FOR PROJECTING A PREDETERMINED DOSE OF A FLUID PRODUCT, AND ITS FILLING METHOD.
FR9108624A FR2678906B1 (en) 1991-07-10 1991-07-10 DEVICE FOR PROJECTING A PREDETERMINED DOSE OF A FLUID PRODUCT, AND ITS FILLING METHOD.
FR9108624 1991-07-10
PCT/FR1992/000583 WO1993000172A1 (en) 1991-06-26 1992-06-25 Device for dispensing a predetermined dose of fluid product, and method of filling thereof

Publications (2)

Publication Number Publication Date
EP0591365A1 EP0591365A1 (en) 1994-04-13
EP0591365B1 true EP0591365B1 (en) 1995-12-20

Family

ID=26228777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92913803A Expired - Lifetime EP0591365B1 (en) 1991-06-26 1992-06-25 Device for dispensing a predetermined dose of fluid product, and method of filling thereof

Country Status (5)

Country Link
US (1) US5511698A (en)
EP (1) EP0591365B1 (en)
JP (1) JPH06508549A (en)
DE (1) DE69206988T2 (en)
WO (1) WO1993000172A1 (en)

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US5769324A (en) * 1996-11-04 1998-06-23 Lenhart; David A. Portable washing device
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FR2761281B1 (en) * 1997-03-26 1999-05-21 Valois Sa DEVICE FOR SPRAYING A FLUID PRODUCT, SUCH AS A BIDOSE
US6200288B1 (en) 1997-08-26 2001-03-13 Queen's University At Kingston Everting toroid device for insertion into a body cavity
US5954688A (en) * 1997-08-26 1999-09-21 Queen's University At Kingston Everting toroid device for delivering a drug into a body cavity
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GB0402690D0 (en) * 2004-02-06 2004-03-10 Glaxo Group Ltd A fluid dispenser
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Also Published As

Publication number Publication date
EP0591365A1 (en) 1994-04-13
US5511698A (en) 1996-04-30
WO1993000172A1 (en) 1993-01-07
JPH06508549A (en) 1994-09-29
DE69206988D1 (en) 1996-02-01
DE69206988T2 (en) 1996-07-04

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