FR2462587A1 - Childproof trigger pump for direct connection to containers - has trigger connected to plunger in cylinder with locking position requiring two hand operation - Google Patents

Abstract

The pump is used for emptying liquids from containers and is screwed directly onto the container. The threaded closure (1) and cylinder (3) are formed in a single casting and are mutually perpendicular. The pump is operated by a trigger (8) connected by a pivot to the plunger (4) and pivoting also about an axis (12) at the upper end of the trigger. To activate the pump the trigger must be pressed at its upper end at the same time as the end of the plunger is pressed in the direction shown by the arrows so that the action is childproof.

Description

 The present invention relates to a pump assembled to a container filled with any fluid, ensuring, by a direct effort of the user, a diffusion under pressure of the aforementioned fluid.

 The invention relates in particular to systems provided with a cylinder and a piston, in which the force necessary for the diffusion of the fluid is provided by the user pushing by at least one finger of his hand a trigger in one direction substantially perpendicular to the axis of the container held in an approximately vertical position.

 It is obvious that by pushing a trigger of the pump in a direction directed against the palm of his hand, the user can more easily provide a greater effort than by directly actuating a pusher of a pump without trigger, in a vertical direction, the force acting on the aforementioned pusher tending to slide the container in the hand of the user.

 The advantage of a pump provided with a trigger is further increased by the fact that it makes it possible to ensure a reduction in the effort supplied by the user by producing an articulated trigger composed of the two arms of the different levers, having between them a desired relationship.

 Unfortunately in all known systems of trigger pumps, the axis of the cylinder-piston assembly is vertical, as in simple pumps fitted with a pusher, so that the elements ensuring the transmission of the angular movements of the trigger to the movements axial in the cylinder-piston assembly are more difficult to mold and the losses caused by sliding friction between the aforementioned elements increase the passive resistance of the device during operation.

 The distribution channel leading to the outlet orifice, composed of two very elongated sections, meeting at right angles also presents significant difficulties which increase the tooling costs, the time of molding and the price of the parts.

 The object of the present invention is to provide improvements to known trigger pumps and more particularly to facilitate the construction and mounting of these devices as well as by increasing their efficiency in extending their field of application.

 According to the present invention, the axis of the cylinder-udder assembly of the trigger pump (trigger) is horizontal and perpendicular to the longitudinal axis of the container so that an articulated trigger or rigidly fixed on a push button provided of a nozzle with an outlet orifice arranged in the axis of the cylinder, acts on this push-button directly by thus eliminating the long distribution channel and composed of the two sections meeting at the right angle.

 According to the preferred embodiment according to the invention, the pump cylinder disposed above the sealing bottom of the sealed closure of the container, is formed in one piece with it, a transverse orifice, disposed at the bottom of this cylinder behind its check valve, crossing the bottom closing off the aforementioned closure.

 According to one embodiment, the aforementioned transverse orifice opens out onto a coaxial, cylindrical hole, forming a sealed housing for a dip tube bringing the fluid from the container to the cylinder of the pump.

 According to another application, the aforementioned transverse orifice opens onto a partial radial slot, formed on the underside of the bottom closing the closure flat; this slot being masked by a circular flat seal, having in its reinforced central part a cylindrical hole communicating with the aforementioned slot and forming a sealed housing for the dip tube.

 According to another form of construction, the pump cylinder is assembled by a sealed socket with a housing formed above the closing bottom of the closure, the direction of separation being substantially perpendicular to the axis of the container, the aforementioned housing being connected to a dip tube in one of the two ways described above.

 Advantageously, the pump cylinder is made of a length such that a push-button emboA1tt in a sealed manner the end of the hollow rod of the piston can be guided by the aforementioned cylinder.

 A particular provision having the object of making such a device a safety pump, that a child is unable to operate, can be made, according to far ~ vention in several different ways.

 According to one embodiment, a trigger articulated around an axis formed on a push button, has on its upper part a groove cooperating with a fixed axis formed on a support integral with a closure, so that part of the face lateral of the groove in sliding contact with the aforementioned fixed axis, allows the free articulation of the trigger, while another part of the same groove places the trigger in an arching position relative to the two aforementioned axes, by blocking it in its rest position.

 It is obvious that in a different embodiment a trigger can be articulated around a fixed axis, formed on a support integral with a closure, while a groove made in the middle of the trigger cooperates with an axis formed on a button. pusher.

 According to a further differentiated embodiment, a cylindrical push button, guided in a cylinder can pivot around its longitudinal axis between two positions, the first of which allows it to move freely axially while it is locked in the second of these two positions.

The objects, characteristics and advantages will also emerge from the description which will be given below, relating to embodiments chosen by way of example and represented in the appended drawings, of which
Figure 1 shows, in vertical axial section, a trigger pump, produced according to the invention.

 Figure 2 is a front view with a partial section.

 Figure 3 shows in partial vertical section the pump of Figures 1 and 2, in the locked position.

 FIG. 4 shows, in vertical axial section9 another embodiment according to the invention, aimed at the push button of the pump.

 Figure 5 is a front view with a partial vertical section.

 FIG. 6 shows, in vertical axial section, another embodiment of the pump cylinder, in accordance with the invention.

 Identical or equivalent elements have the same indices in all the figures.

 In FIGS. 1 and 2, a screwable closure 1 with a closing flat bottom 2 is produced in one piece with a cylinder 3, the axis of which is substantially perpendicular to the longitudinal axis of the closure 1.

 A cylindrical push button 4, fitted on its front face with a nozzle 5 and sealingly embedding a hollow rod 6 of a piston 7, is mounted with a sliding seal in the cylinder 3.

 A trigger 8 freely articulated around the two diametrically opposite pins 9 and 9 ′, formed near the front face of the push button, has on its two upper flat walls 10 and 10 ′ two grooves identical to each other it and 111, these grooves cooperating with two pins 12 and 12 ′ produced on the exterior faces of the walls 13 and 13 ′ of a fixed support 14, integral with the closure 1. A spring 47 placed inside the hollow rod 6, by pushing a ball 48, closes a hole 49 made through a closing bottom 50 of the rod 6.

 A blind hole 15, produced in the axis of the cylinder 3, behind a suction valve produced by a ball 16, meets a transverse hole 18, this hole 18 passing through the flat bottom 2 of the closure 1 and forming a cylindrical housing 19 to the dip tube 20.

 A hole 21 passing through the sealing bottom 2 and a hole 22 passing through a flat seal 23, provide communication between the open air and the interior of the container.

 This communication, interrupted by the piston 7 in the rest position shown in Figure 1, is open during the diffusion of the liquid, the piston 7 protruding from the orifice 21 during this operation.

 The operation of the trigger pump (trigger) according to the invention is identical to the well known operation of a pump with prior compression, equipped with a push-button cap.

 In fact, the trigger 8 by acting directly on the two diametrically opposite pins 9 and 9 'of the push button 4 guided in the cylinder 3, pushes the piston 7 in the direction of its axial movement, compressing the fluid drawn into the cylinder 3 and the ball 48 opens the hole 49, starting the diffusion, only when the pressure of the fluid in the cylinder 3 is greater than the tension of the spring 47, thereby carrying out a prior compression of the fluid before its diffusion.

Figure 1 shows in dashed line the trigger 8 in the position, in which the diffusion of the product being finished, the aspiration of the liquid from the container to the metering chamber of the cylinder will begin, this aspiration being arranged by the dice
tent of a spring 17 placed between the face 50 of the piston 7 and a
washer 39 provided with a hole 51 and resting on the flange 40 of the
cylinder 3.

In Figure 3 the pump of Figures 1 and 2 is shown
felt with the trigger 8 arcboutée between the axes 9, 9 'and 12 12t, this position of the trigger being obtained by two movements
simultaneous movements, one of these two movements tending b articu
the trigger 8 in the opposite direction to the necessary direction of the diffu
liquid and the other of these two movements pushing its
upper part towards the fixed support 14.

This is how a childproof pump,
that a child is unable to operate, is realized,
since the release of trigger 8 from its position
can only be locked by pressing simultaneously
on the trigger 8 and on the push button 4.

In Figures 4 and 5, a pump is shown
sant the invention included a security system (childproof)
and a device carrying out a prior compression (hard point).

In these figures, a freely articulated trigger 8
around the pins 12 and 12 ′ formed on the flat walls 13
and 13 'of a support 14 secured to the closure 1, is stopped
in the position shown in Figure 4, by the side face-
rale 24 of a wall 25 of the support 14, abutting against the face la-
26 of the wall 27 of the trigger 8.

A cylindrical push button 4 provided near its ex
closed hopper with a radial finger 28, can rotate around its
longitudinal axis between an angular locking position, a
position in which the finger 28 abuts against the edge 29 of the
cylinder 3 thereby achieving the safety device and a
second angular position in which a longitudinal slot
the 30 formed in the cylinder, 3 allows the axial displacement of the
push button the boss 31 formed on the wall 27 of the ga
'chette 8, by pushing the finger 28, ensuring this axial displacement.

An O-ring 32 placed in an annular groove
realizes the pump piston, the pre-drilled groove being formed
on one side by the radially reduced cylindrical end 33 and the
lateral face 34 of the push button 4 and, on the other side, by
a side face of a disc 35 projecting from the end
tee of a tubular element 36 fitted inside the pusher4
a longitudinal slot 37 formed on the outer cylindrical face of the element 36, communicating the front side with the rear side of this element.

 A cylindrical element 38 supported by its rear end in the form of a disc 39 on the rim 40 formed in the bottom of the cylinder 3, is mounted b sealed sliding inside the element 36, the element 36 having b its end oriented towards the nozzle 5, a frustoconical boss 41 crossed by an unnamed axial hole. A spring 17 placed between the discs 35 and 39 pushes the tubular element 36 towards a position in which the boss 41 closes a hole 42 made in the center of a wall 43 cn separating the interior of the push button 4 in two parts.

 A hole 18, communicating with a blind hole 15, opens onto a radial slit without Index, masked by a circular flat seal 23, the seal 23 having in its reinforced central part 39 a housing 19 for a flexible tube 20, this housing communicating with the slit without index.

 In FIG. 6 a removable cylinder 3 is embedded in a sealed manner in a cylindrical housing 46 formed integrally with the closure 1.

 The operation of the pump shown in Figures 4 and 5 is easy to understand.

 Indeed, the user by pressing the trigger 8, pushes back the push button 4 and thus exerts on 1 tubular element 36 Playing the role of a differential piston, a resulting thrust thwarted by the tension of the spring 17, such 8Once the frustoconical end 41 opens the central hole 42 which conies diffusion only when the above-mentioned resulting thrust is greater than the tension of the spring 17.

 It is important to emphasize that to ensure proper operation of a suction valve produced by a ball 16 resting on a seat having a horizontal axis, the tapered housing 44 has a flat face 45, inclined towards the rear of such that the ball 16 resting on the face 45 is pushed towards its seat.

 It is understood that the arrangements described and shown may lend themselves to or give rise to various modifications and variants without, however, departing from the scope of the invention.

More particularly, it will be possible, in the applications of Il in vention, to use any specific arrangement to make an assembly of a cylinder when the container is closed, to use any suitable arrangement to carry out an assembly of a cylinder to close the container. , use different means to make the safety devices, change the position of the cylinder or the axis of articulation of a trigger, print the axial displacements to the cylinder by making a fixed miston, etc ...

Claims (10)

1. Pump comprising a cylinder and a piston, assembled using  a tight seal to a container filled with a fluid  whatever ensuring by user effort, a so-called  pressure melting of the aforementioned fluid, this pump character-  laughed at by the fact that push button, piston, cylinder, seat  of the suction valve and the outlet outlet of a nozzle is  lie on a common axis or substantially parallel axes  horizontal in normal position of use of the container,  ie on a container with vertical axis. 2. Pump according to claim 1, including the cylinder, produced  in mono-material with the closure of the container, is placed at the  above its sealing base, the axis of the cylinder being substantially perpendicular to the longitudinal axis of the closure pr * -  cited. 3. Pump according to claim 1, including the removable cylinder  is sealed in a housing made of  single material with container closure, cylinder axis  being substantially perpendicular to the longitudinal axis of the  aforementioned closure. 4. Pump according to claims 1, 2 or 1, 3 wherein  a hollow rod of a piston recessed in a sealed manner  inside a cylindrical push button guided in the cy  pump hose, present at its closed rear end  a hole closed, by a ball housed inside the rod  hollow, this ball being pushed against the aforementioned hole by  a spring housed between the ball and the rear face of a wall  provided with an orifice, separating the push button in two by  separate ties. 5. Pump according to claims 1, 2 or 1.3 wherein  the cylindrical push button, guided in the cylinder  and embedding a cylindrical element provided at its end  back of a protruding disc behind the face  rear plane of the cylindrical end radially reduced by  push button, forms an annular groove which, when receiving  an O-ring, realizes the pump piston, a boss  frustoconical crossed by an axial hole, this boss formed on  the front end of the aforementioned tubular element, closes a  hole made in the center of a wall separating the interior of the  two-part push-button, a logitudinal slit  formed on the outer face of the tubular member, putting  in communication the two opposite sides of this tubular element  laire, a second tubular element integral with the cylinder  being slidably mounted inside the element  aforementioned tubular. 6. Pump according to claims 1, 2, 4, 5 or 1, 3, 4; 5  in which a trigger having the elongated shape in line  straight and preferably with a U-shaped profile, articulated  around an axis formed on the front part of a push button,  present in its upper part, on each of the two pa  kings parallel plates a groove cooperating with a for axis  mé on a fixed support, integral with the closure, the form  welded two identical grooves between them allowing  the trigger to take at least one position in which  she can freely execute the angular displacements and  a second position in which it is blocked in its  starting position. 7. Pump according to claims 1, 2, 4, 5 or 1, 3, 4, S  in which a trigger having the elongated shape in line  straight and preferably with a U-shaped profile, articulated  around an axis formed on a fixed support integral with the  closing, the aforementioned trigger having in its part in  serious, on each of the two parallel flat walls one  groove cooperating with an axis formed on the front part of a  push button, the two grooves identical to each other and  having a bent shape allowing the trigger to take at  least one position in which she can freely perform  angular displacements and a second position, in the  what she's stuck in her starting potition. 8. Pump according to claims 1, 2, 4, 5 or 1, 3, 4, 5  in which a cylindrical push button, guided in the  pump cylinder, can rotate about its longitu axis  dinar between two positions, the first of which allows  free axial displacements, while it is blocked in the  second of these two positions. 9. Pump according to claims 1, 2 or 1, 3 and any one  as in the preceding claims, in which a ball  resting on a seat having a horizontal axis, forms a  suction valve; characterized by the fact that the housing  in which the ball moving axially can take  a position. opening is formed in its lower part  by a flat face inclined towards the aforementioned seat, the pro  foundry of this housing being limited by a disc provided with a  orifice, leaning on a non-cylindrical surface made  in the bottom of the cylinder, this disc at the same time forming a  support for a spring pushing by its opposite end the piston  towards its relaxed position. 10. Pump according to claims 1, 2, 4 or 1, 3, 4 and a  any of the preceding claims in which a  transverse hole leading to a blind hole, made in  the axis of the cylinder, behind its suction valve, cross  is the bottom closing the closure and opens by its ex  lower end directly or through a radial slot  partial on a sealed cylindrical housing receiving a  dip tube.