EP1572375B1 - Manually-actuated metering pump - Google Patents

Manually-actuated metering pump Download PDF

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Publication number
EP1572375B1
EP1572375B1 EP03813191A EP03813191A EP1572375B1 EP 1572375 B1 EP1572375 B1 EP 1572375B1 EP 03813191 A EP03813191 A EP 03813191A EP 03813191 A EP03813191 A EP 03813191A EP 1572375 B1 EP1572375 B1 EP 1572375B1
Authority
EP
European Patent Office
Prior art keywords
metering pump
valve
pump
pusher
bottle
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
EP03813191A
Other languages
German (de)
French (fr)
Other versions
EP1572375A1 (en
Inventor
Laurent Arghyris
Patrice Puviland
Jean-Philippe Taberlet
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.)
Lablabo SA
Original Assignee
Lablabo SA
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Filing date
Publication date
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Publication of EP1572375A1 publication Critical patent/EP1572375A1/en
Application granted granted Critical
Publication of EP1572375B1 publication Critical patent/EP1572375B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-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
    • B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0062—Outlet valves actuated by the pressure of the fluid to be sprayed
    • B05B11/0072—A valve member forming part of an outlet opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-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
    • B05B11/10—Pump 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
    • B05B11/1001—Piston pumps
    • B05B11/1004—Piston pumps comprising a movable cylinder and a stationary piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
    • B05B11/00442—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means the means being actuated by the difference between the atmospheric pressure and the pressure inside the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
    • B05B11/00444—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means with provision for filtering or cleaning the air flow drawn into the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
    • B05B11/00446—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means the means being located at the bottom of the container or of an enclosure surrounding the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-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
    • B05B11/10—Pump 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
    • B05B11/1042—Components or details
    • B05B11/1073—Springs
    • B05B11/1074—Springs located outside pump chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/14—Pumps characterised by muscle-power operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-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
    • B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons
    • B05B11/026—Membranes separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container

Definitions

  • the present invention relates to a dosing pump for dispensing fluid, liquid or pasty products, and more particularly to a manually operated dosing pump for a rigid bottle with a flexible bag or a plunger and a plunger tube, containing a fluid, liquid or pasty product intended for be delivered in constant unit doses, and a dispensing device equipped with such a pump.
  • metering pumps for dispensing fluid, liquid or pasty products. They are mounted on a bottle containing the product to be dispensed and they consist of a metering chamber having a determined volume, a piston capable of moving in the chamber under the action of a pusher, and at least two flaps.
  • This mode of operation implies that air can be introduced into the bottle to compensate for the volume released by the product expelled from the bottle and allow regular filling of the metering chamber each time the pusher is actuated.
  • a vent is provided, generally in the bottom or in the neck of the bottle, to allow the outside air to penetrate in the space between the bottle and the bag with each actuation of the pump and thus allow the bag to retract while maintaining a sufficient pressure on its walls.
  • An exemplary embodiment according to this technique is described in patent FR 2,723,356 relating to a device comprising a flexible plastic bag, such as polyethylene or polypropylene, in a rigid container whose neck has an air inlet.
  • Patent FR 2,669,379 describes a metering pump providing a good seal even in the case of a change of position, of the axial piston type carrying a sliding floating piston, comprising three valves.
  • Patent FR 2,726,810 describes an example of a pump without air intake in which the lower valve is flexible and frustoconical while the upper valve is carried by a disk placed at the base of the hollow rod of the pusher.
  • pumps of this type have the disadvantage of have a relatively large number of components, which weakens them and increases their cost of manufacture.
  • Patent EP 0,538,162 describes a closure device for a bottle, a variant of which comprises a hollow pusher forming a metering chamber, between an outlet valve and an intake valve; when the pusher is actuated, the base of the lower valve member is pushed back and deformed, thereby facilitating the opening of the truncated cone surrounding the axial cylindrical part, which may cause a return of fluid into the bottle.
  • the patent application WO 95.25945 relates to a pump comprising a lower deformable valve and an expulsion valve whose orifice is similar, but the dimensions and different functions.
  • Other examples of dispenser bottles with a hollow pusher are described in patents EP 888,823 and EP 733,559. In all these dispenser bottles, the valves have different shapes, dimensions and functions.
  • the present invention relates to a metering pump without air intake, for the distribution of fluid products, liquid or pasty, comprising a reduced number of components.
  • the present invention also relates to a dosing pump without air intake, ensuring regular distribution of constant unit doses of fluid, liquid or pasty products.
  • the subject of the invention is also a device for packaging and dispensing fluid, liquid or pasty products of the rigid bag type with a flexible bag, comprising a metering pump as described above, ensuring satisfactory operation whatever the position. rigid bottle.
  • the subject of the invention is also a device for packaging and dispensing fluid or liquid products of the rigid vent-type type, comprising a metering pump as described above, mounted in a sealed manner on a vial provided with a vent .
  • the manually operated dosing pump for rigid bottle, is of the double-valve type, comprising a lower inlet valve and an upper inlet and outlet expulsion valve, respectively, a metering chamber slidably mounted on the lower valve, and it is distinguished in that the lower valve and the upper valve are identical.
  • the lower valve is fixed on a hollow tube communicating with the pocket, while the upper valve is mounted at the end of the outlet nozzle of the pump.
  • This embodiment has the advantage of constituting an extreme closure which negates the dead volume of product output pusher, which facilitates the preservation of the latter and avoids an unsightly accumulation of product at the exit of the pusher which could, drying, close the outlet nozzle.
  • the lower valve on which slides the pump chamber, acts as a piston, which simplifies the manufacture of the pump.
  • the two valves, lower and upper are identical and interchangeable mounting the device, which greatly simplifies its manufacture and greatly reduces the cost.
  • the valves are constituted by a cylindrical cap of elastic material drilled in its center, fixed on a cylindrical piece forming a support and having an annular orifice surrounding in its center an element coming opposite the hole of the hood and masking the latter.
  • the front wall of the cap covers the annular orifice and bears on the central element.
  • An external overpressure plate the wall of the cap against its support and then holds the closed flap.
  • an overpressure internal causes the lifting of the elastic blade of the front wall of the cap, discovering the annular orifice and causing the opening of the valve.
  • the valves have a cylindro-conical shape comprising a dome pierced at its center, whose wall, in the closed position, covers the annular orifice outlet nozzle in a plane substantially perpendicular to the flow coming out of the fluid. More particularly, the wall of the valve, in its dome-shaped portion, covers the annular orifice, substantially perpendicular to its axis, and bears on the central cylindrical element located in the axis of the orifice. This arrangement allows the valve to be combined with a relatively large section orifice, both for the lower intake valve and the upper expulsion valve.
  • valves can be made of any material having the desired characteristics of flexibility and elasticity, and compatible with the products contained in the bottle.
  • valves made of natural or synthetic rubber or thermoplastic elastomers such as thermoplastic polyesters, polyurethanes or SBS, or silicones.
  • the valves are made of a material whose Shore A hardness is between 40 and 80, and preferably between 50 and 60.
  • the pump may be advantageous, in accordance with the invention, to mount the pump in a sealed manner on the rigid bottle by means of a ring or cover.
  • the pump is mounted directly on the bottle, for example by interlocking.
  • the pusher comprises means for limiting its stroke and adapting the dose to a determined volume.
  • These means can be realized in for example providing one or more stops placed on the moving part of the pusher and cooperating with complementary means on the fixed part, or by playing on the length of the cylindrical portion of the pusher, or by inserting a travel limiter sleeve of the pusher on the support. It is thus possible to provide fluid product dispensing devices intended to provide different doses of product, by modifying only one constituent element, or by inserting a single complementary element. Such a system is particularly economical.
  • An air inlet circuit is provided so that outside air can enter the bottle and compensate for the volume of product expelled by the pump.
  • This air circuit is preferably located at the pusher of the pump, and comprises means to ensure its closure when the pusher is raised, in the rest position.
  • the air circuit can be constituted by a vent, preferably in the bottom of the bottle.
  • a vent provided with a valve, to prevent leakage of the product contained in the bottle, and a filter to prevent the introduction of pollutants , such as bacteria, which could degrade the product to be dispensed.
  • the end of the dip tube may be close to the bottom of the bottle.
  • a cap or cap may be provided removably mounted on the dispensing head.
  • Means may be provided for sealing the mounting of the cap on the head, and for example the cap may be inserted by interlocking due to a complementary shape of the inner edge of the cap and the base of the nose of the pusher receiving this assembly being supplemented by an O-ring or sealing gongs.
  • Such an accessory completing the pump and its pusher ensures excellent sealing in all storage conditions, even in case of drop in the external pressure, and preserves the product contained in the bottle.
  • the pump according to the present invention has the advantage of having only a limited number of components, which reduces manufacturing costs.
  • the pump of the invention comprises only 5 or 6 components, depending on the configuration adopted; in addition, the lower (intake) and upper (expulsion) valves can be identical, which further reduces the tools required for manufacturing.
  • the pumps commonly used in the art of soft-bag flasks for cosmetic or pharmaceutical products generally comprise between 15 and 20 components.
  • the pump is generally made of plastic material such as polyethylene or polypropylene of appropriate density to give it the desired mechanical properties.
  • the pouch may be made of a plastic material selected for example from polyethylene, polypropylene, polyamide, ethylene vinyl alcohol copolymer (EVOH), low density polyethylene, and the like. They may be monolayer materials or multilayer complexes including a metal layer, for example an aluminum layer forming a barrier reinforcing the seal, combined with one or more layers of plastic material.
  • a plastic material selected for example from polyethylene, polypropylene, polyamide, ethylene vinyl alcohol copolymer (EVOH), low density polyethylene, and the like.
  • EVOH ethylene vinyl alcohol copolymer
  • low density polyethylene and the like.
  • They may be monolayer materials or multilayer complexes including a metal layer, for example an aluminum layer forming a barrier reinforcing the seal, combined with one or more layers of plastic material.
  • the pouch can be made from these materials by techniques such as one-piece blowing, which has the advantage of reducing the investment required for manufacturing. It is also possible by injection blow molding or extrusion blow molding of a parison in a suitable mold. It is also possible to manufacture the bag by welding a plastic or metal film, or a metal / plastic multilayer complex on a support forming the neck of the pocket.
  • the bag may be of low density polyethylene when it must contain a cream that is not very sensitive to the effects of the external medium, while it may be made of a polyamide providing better protection against the effects of the oxygen and against the evaporation loss of water vapor, when it must contain a more fragile product.
  • the pump (1) shown in Figure 1 is mounted on the body (2) of a rigid bottle through a cover (3).
  • the cover (3) has a cylindrical hole (4) in which is housed the body (5) of the pump (1) which can slide there.
  • the chamber (6) of the pump (1) is delimited by the lower valve (7), or intake valve, and the upper valve (8), or expulsion valve.
  • the two valves (7) and (8) are identical but mounted in opposition, as indicated below, that is to say that the inlet valve closes when the expulsion valve opens, and conversely , depending on the movements of the pump.
  • the upper valve (8) is mounted at the end of the pump outlet nozzle.
  • the upper part of the pump body is in the form of a pusher (9) allowing the user to actuate the pump from the position shown in Figure 1 by pressing the pusher (9) against the coil spring.
  • metal (10) placed outside the chamber, so that it does not come into contact with the product exiting the pocket.
  • the body of the pump slides in the cylindrical hole (4) of the cover (3), until the lower end (11) of the body (5) of the pump comes to bear against the collar ( 12) integral with the tube (13) carrying the lower valve (7).
  • the pocket (16) is fixed by its neck (17) to the base of the tube (13), and rests on the shoulder (18) formed on the body (2) of the bottle.
  • the attachment of the neck (17) to the tube (13) can be done by ultrasonic welding.
  • the small size of the neck (17) of the pocket, less than a third of the section of the bottle, facilitates its manufacture by simple blowing technique.
  • an air inlet circuit is provided so that the outside air can penetrate into the space separating the pocket from the wall inside the bottle in order to maintain sufficient pressure so that the bag can retract with each expulsion of product.
  • This air circuit is matrialized by the space between the outer part of the body (5) and the inner wall of the cylindrical hole (4), forming a channel allowing air to pass between the walls of the pump and the cylindrical hole.
  • This channel is open when the pusher is actuated, and it is closed when the pusher is raised because in this position, the annular rib (19) abuts against the edge of the cylindrical hole (4) and closes the channel.
  • Tests carried out with a device as represented in FIG. 1, comprising a pump according to the invention, have demonstrated an excellent regularity of dosage, and restitution rates of the order of 90 to 95% in the case of creams, according to their viscosity, and greater than 95% in the case of liquids.
  • the priming of the pump during the first use can be obtained in 3 or 4 pressures only on the pusher.
  • Figure 2 shows the pump of Figure 1 sealingly mounted on a single rigid bottle for fluid products, preferably for liquids, where the pump is extended in the bottle by a dip tube.
  • the pusher of the pump of Figure 2a is in the up position, and the circular retainer (14) located at the base of the pusher is then in contact with the abutment shoulder (15) on the inner face of the cylindrical hole receiving the pusher .
  • the base (11) of the pusher comes against the flange (12) forming the bottom of the cylindrical hole (4) as shown in Figure 2b.
  • the stroke H1 of the pusher is indicated in FIG. 2a and is equal to the distance separating the flange (12) from the base (11) of the pusher in the raised position.
  • the downward movement of the pusher causes the opening of the valve (8) and the expulsion of the product in the metering chamber (6), while the inlet valve (7) remains closed under the action of the overpressure in the room.
  • the cylindrical base of the pusher is extended beyond the circular retainer (14), and the height H2 separating the base (11) from the bottom pusher (12) of the collar is then smaller.
  • the stroke of the piston is limited to the height H2, so that the pressure on the pusher causes the expulsion of a partial dose out of the chamber (6).
  • FIG. 4a An equivalent embodiment is shown in Figure 4a, where the pusher (9) is identical to that of Figure 2a, but its stroke is limited by a cylindrical ring (21) placed in the bottom of the cylindrical hole, on the base of the collar (12).
  • the stroke H3 of the pusher is then equal to the stroke H1 of the device of FIG. 2a, minus the height of the cylindrical ring (21).
  • Figure 5 shows a rigid bottle (2) carrying the pump (1) of the invention comprising the two valves (7) and (8) and the pusher (9).
  • the bottle (2) is completed by a venting system (22).
  • the venting system comprises a plug (23) inserted in a hole provided in the bottom of the bottle (2), and carrying a filter (24) and a valve (25) of the usual type.
  • the flapper is designed to allow the outside air to enter the bottle only when a depression is formed in the latter, that is to say when a dose of product is sucked by the dip tube (20) of the bottle to the dosing chamber (6).
  • FIG. 6 shows the detail of the upper valve (8) carrying a cap (26) sealingly mounted on the nose of the pusher (9).
  • the seal is obtained by means of a rib (27) cooperating with the base of the cylindrical cap (26) made of elastic material. It is completed by the ribs (28) formed on the cylindrical base of the upper valve (8).
  • the cap (26) completely envelops the valve (8), sealing the device.
  • the product outlet nozzle comprises an annular orifice (29) surrounding a cylindrical member (30) which is opposite the hole (31) formed in the front face of the valve (8).
  • the end face of the valve (8) is applied to the cylindrical element (30) and masks the annular orifice (29).
  • an overpressure in the conduit of the orifice (29) causes the separation of the edge of the valve around the central hole (31), passing through the product leaving the metering chamber (6).
  • the watertight cap (26) by masking the nose of the pusher (9), prevents a possible drop in external pressure causes the same phenomenon, and thus ensures the safety of the product contained in the bottle, storage.
  • the cylindrical element (30) in the axis of the annular orifice (29) has on its front face a cylindrical protrusion (32) of the same axis as the cylindrical element. (30).
  • This protuberance forms with the front face of the element cylindrical, a shoulder cooperating with the edge the central orifice of the valve (8), so that the front surface of the cylindrical protuberance (32) is in line with the surface of the valve (8).
  • This embodiment makes it possible to guide the flow of fluid leaving the orifice (29), even if the edges of the valve do not lift perfectly symmetrically with respect to the axis of the annular orifice (29).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Closures For Containers (AREA)
  • Reciprocating Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

The pump (1) has a suction valve (7) and an expulsion valve (8) at input and output of the pump, respectively. A metering chamber (6) is slidingly mounted on the suction valve and fixed on a hollow tube (13) communicating with an interior of a flask (2). The expulsion valve is mounted at an end of a nozzle tip at the output to constitute an extreme closing. A cylindrical ring limits movement of a valve lifter. An Independent claim is also included for a device for conditioning and distributing fluid products.

Description

La présente invention concerne une pompe doseuse pour la distribution de produits fluides, liquides ou pâteux, et plus particulièrement une pompe doseuse à actionnement manuel pour flacon rigide à poche souple ou à piston et tube plongeur, contenant un produit fluide, liquide ou pâteux destiné à être délivré en doses unitaires constantes, ainsi qu'un dispositif de distribution équipé d'une telle pompe.The present invention relates to a dosing pump for dispensing fluid, liquid or pasty products, and more particularly to a manually operated dosing pump for a rigid bottle with a flexible bag or a plunger and a plunger tube, containing a fluid, liquid or pasty product intended for be delivered in constant unit doses, and a dispensing device equipped with such a pump.

Le principe de fonctionnement des pompes doseuses pour la distribution de produits fluides, liquides ou pâteux est bien connu. Elles sont montées sur un flacon contenant le produit à distribuer et elles sont constituées d'une chambre doseuse présentant un volume déterminé, d'un piston susceptible de se déplacer dans la chambre sous l'action d'un poussoir, et d'au moins deux clapets. Le clapet inférieur, ou clapet d'admission, situé à l'entrée de la chambre et contrôlant la communication avec l'intérieur du flacon, est fermé lorsque le poussoir est enfoncé tandis que le clapet supérieur, à la sortie de la chambre, est ouvert, laissant passer le produit expulsé de la chambre par le déplacement du piston, puis, lorsque le poussoir est relâché, le piston remonte dans la chambre sous l'action d'un ressort, le clapet supérieur se referme tandis que le clapet inférieur s'ouvre, permettant le remplissage de la chambre en vue d'une nouvelle distribution d'une dose de produit.The operating principle of metering pumps for dispensing fluid, liquid or pasty products is well known. They are mounted on a bottle containing the product to be dispensed and they consist of a metering chamber having a determined volume, a piston capable of moving in the chamber under the action of a pusher, and at least two flaps. The lower valve, or inlet valve, located at the entrance of the chamber and controlling the communication with the interior of the bottle, is closed when the pusher is depressed while the upper valve, at the exit of the chamber, is open, allowing the product expelled from the chamber by the movement of the piston, then, when the pusher is released, the piston back into the chamber under the action of a spring, the upper valve closes while the lower valve s opens, allowing the filling of the chamber for a new distribution of a dose of product.

Ce mode de fonctionnement implique que de l'air puisse s'introduire dans le flacon pour compenser le volume libéré par le produit expulsé du flacon et permettre le remplissage régulier de la chambre de dosage à chaque actionnement du poussoir.This mode of operation implies that air can be introduced into the bottle to compensate for the volume released by the product expelled from the bottle and allow regular filling of the metering chamber each time the pusher is actuated.

Pour assurer le conditionnement et la distribution de produits qui doivent être conservés à l'abri de l'air, notamment dans le domaine des produits pharmaceutiques et cosmétiques, on connaît des dispositifs qui comportent généralement un récipient à coque rigide dans lequel se déplace un piston repoussant le produit vers l'orifice d'admission dans la chambre de dosage et l'isolant de l'air qui pénètre au-dessus du piston. On connaît aussi des dispositifs à récipient rigide dans lequel est placée une poche souple qui se rétracte au fur et à mesure que le produit en est extrait. Le produit restant dans la poche est maintenu à l'abri de l'air, tandis que l'expulsion du produit hors de la poche peut être obtenue au moyen d'une pompe sans reprise d'air, ou "airless", ou sous la pression d'un gaz propulseur agissant sur la paroi de la poche, dans le flacon.To ensure the packaging and distribution of products that must be kept safe from the air, especially in the field of pharmaceuticals and cosmetics, there are known devices that generally include a rigid shell container in which moves a piston pushing the product to the inlet into the metering chamber and the air insulation that penetrates above the piston. Also known are rigid container devices in which is placed a flexible pouch which retracts as the product is extracted. The product remaining in the pocket is kept out of the air, while the expulsion of the product out of the pocket can be obtained by means of a pump without air intake, or "airless", or under the pressure of a propellant gas acting on the wall of the pocket, in the bottle.

Dans le cas de l'expulsion du produit hors de la poche au moyen d'une pompe sans reprise d'air, un évent est prévu, généralement dans le fond ou dans le col du flacon, pour permettre à l'air extérieur de pénétrer dans l'espace situé entre le flacon et la poche à chaque actionnement de la pompe et permettre ainsi à la poche de se rétracter en maintenant une pression suffisante sur ses parois. Un exemple de réalisation suivant cette technique est décrit dans le brevet FR 2.723.356 relatif à un dispositif comportant une poche en matière plastique souple, telle que polyéthylène ou polypropylène, dans un récipient rigide dont le col comporte une entrée d'air.In the case of the expulsion of the product out of the pocket by means of a pump without air intake, a vent is provided, generally in the bottom or in the neck of the bottle, to allow the outside air to penetrate in the space between the bottle and the bag with each actuation of the pump and thus allow the bag to retract while maintaining a sufficient pressure on its walls. An exemplary embodiment according to this technique is described in patent FR 2,723,356 relating to a device comprising a flexible plastic bag, such as polyethylene or polypropylene, in a rigid container whose neck has an air inlet.

Les pompes doivent assurer une bonne étanchéité et pouvoir fonctionner aussi bien en position verticale qu'en position inclinée. Le brevet FR 2.669.379 décrit une pompe doseuse procurant une bonne étanchéité même en cas de changement de position, du type à piston axial portant un piston flottant coulissant, comportant trois clapets. Le brevet FR 2.726.810 décrit un exemple de pompe sans entrée d'air dans laquelle le clapet inférieur est souple et tronconique tandis que le clapet supérieur est porté par un disque placé à la base de la tige creuse du poussoir. Toutefois, les pompes de ce type présentent l'inconvénient de comporter un nombre relativement important de composants, ce qui les fragilise et alourdit leur coût de fabrication.The pumps must ensure a good seal and be able to work both in vertical position and inclined position. Patent FR 2,669,379 describes a metering pump providing a good seal even in the case of a change of position, of the axial piston type carrying a sliding floating piston, comprising three valves. Patent FR 2,726,810 describes an example of a pump without air intake in which the lower valve is flexible and frustoconical while the upper valve is carried by a disk placed at the base of the hollow rod of the pusher. However, pumps of this type have the disadvantage of have a relatively large number of components, which weakens them and increases their cost of manufacture.

Le brevet EP 0.538.162 décrit un dispositif d'obturation pour flacon, dont une variante comporte un poussoir creux formant une chambre de dosage, entre un clapet de sortie et un clapet d'admission ; quand on actionne le poussoir, la base de la pièce formant clapet inférieur est repoussée et se déforme, facilitant alors l'ouverture du tronc de cône entourant la pièce cylindrique axiale, ce qui risque d'entraîner un retour de fluide dans le flacon. La demande de brevet WO 95.25945 concerne une pompe comportant un clapet inférieur déformable et un clapet d'expulsion dont l'orifice est similaire, mais les dimensions et les fonctions différentes. D'autres exemples de flacons distributeurs à poussoir creux sont décrits dans les brevets EP 888.823 et EP 733.559. Dans tous ces flacons distributeurs, les clapets ont des formes, des dimensions et des fonctions différentes.Patent EP 0,538,162 describes a closure device for a bottle, a variant of which comprises a hollow pusher forming a metering chamber, between an outlet valve and an intake valve; when the pusher is actuated, the base of the lower valve member is pushed back and deformed, thereby facilitating the opening of the truncated cone surrounding the axial cylindrical part, which may cause a return of fluid into the bottle. The patent application WO 95.25945 relates to a pump comprising a lower deformable valve and an expulsion valve whose orifice is similar, but the dimensions and different functions. Other examples of dispenser bottles with a hollow pusher are described in patents EP 888,823 and EP 733,559. In all these dispenser bottles, the valves have different shapes, dimensions and functions.

La présente invention a pour objet une pompe doseuse sans reprise d'air, pour la distribution de produits fluides, liquides ou pâteux, comportant un nombre réduit de composants.The present invention relates to a metering pump without air intake, for the distribution of fluid products, liquid or pasty, comprising a reduced number of components.

La présente invention a également pour objet une pompe doseuse sans reprise d'air, assurant une distribution régulière de doses unitaires constantes de produits fluides, liquides ou pâteux.The present invention also relates to a dosing pump without air intake, ensuring regular distribution of constant unit doses of fluid, liquid or pasty products.

L'invention a encore pour objet un dispositif de conditionnement et de distribution de produits fluides, liquides ou pâteux, du type flacon rigide à poche souple, comprenant une pompe doseuse telle que décrite ci-dessus, assurant un fonctionnement satisfaisant quelle que soit la position du flacon rigide.The subject of the invention is also a device for packaging and dispensing fluid, liquid or pasty products of the rigid bag type with a flexible bag, comprising a metering pump as described above, ensuring satisfactory operation whatever the position. rigid bottle.

L'invention a aussi pour objet un dispositif de conditionnement et de distribution de produits fluides ou liquides, du type flacon rigide à évent, comprenant une pompe doseuse telle que décrite ci-dessus, montée de manière étanche sur un flacon pourvu d'un évent.The subject of the invention is also a device for packaging and dispensing fluid or liquid products of the rigid vent-type type, comprising a metering pump as described above, mounted in a sealed manner on a vial provided with a vent .

Conformément à la présente invention, la pompe doseuse à actionnement manuel, pour flacon rigide, est du type à double clapet, comprenant un clapet inférieur d'admission et un clapet supérieur d'expulsion à l'entrée et à la sortie, respectivement, d'une chambre de dosage montée coulissante sur le clapet inférieur, et elle se distingue en ce que le clapet inférieur et le clapet supérieur sont identiques.In accordance with the present invention, the manually operated dosing pump, for rigid bottle, is of the double-valve type, comprising a lower inlet valve and an upper inlet and outlet expulsion valve, respectively, a metering chamber slidably mounted on the lower valve, and it is distinguished in that the lower valve and the upper valve are identical.

Suivant une forme préférentielle de réalisation de l'invention, le clapet inférieur est fixé sur un tube creux communiquant avec la poche, tandis que le clapet supérieur est monté à l'extrémité de la buse de sortie de la pompe. Cette forme de réalisation présente l'avantage de constituer une fermeture extrême qui réduit à néant le volume mort de produit en sortie de poussoir, ce qui facilite la préservation de ce dernier et évite une accumulation disgracieuse de produit à la sortie du poussoir qui pourrait, en se desséchant, obturer la buse de sortie.According to a preferred embodiment of the invention, the lower valve is fixed on a hollow tube communicating with the pocket, while the upper valve is mounted at the end of the outlet nozzle of the pump. This embodiment has the advantage of constituting an extreme closure which negates the dead volume of product output pusher, which facilitates the preservation of the latter and avoids an unsightly accumulation of product at the exit of the pusher which could, drying, close the outlet nozzle.

Le clapet inférieur, sur lequel coulisse la chambre de la pompe, fait office de piston, ce qui simplifie la fabrication de la pompe.The lower valve, on which slides the pump chamber, acts as a piston, which simplifies the manufacture of the pump.

Conformément à une autre caractéristique préférentielle de l'invention, les deux clapets, inférieur et supérieur, sont identiques et interchangeables au montage du dispositif, ce qui simplifie considérablement sa fabrication et en réduit fortement le coût.According to another preferred feature of the invention, the two valves, lower and upper, are identical and interchangeable mounting the device, which greatly simplifies its manufacture and greatly reduces the cost.

Suivant une forme de réalisation simple et peu onéreuse, les clapets sont constitués par un capuchon cylindrique en matière élastique percé en son centre, fixé sur une pièce cylindrique formant support et comportant un orifice annulaire entourant en son centre un élément venant en regard du trou du capuchon et masquant ce dernier. Au repos, la paroi frontale du capuchon recouvre l'orifice annulaire et prend appui sur l'élément central. Ainsi le clapet est fermé. Une surpression externe plaque la paroi du capuchon contre son support et maintient alors le clapet fermé. Au contraire, une surpression interne provoque le soulèvement de la lame élastique de la paroi frontale du capuchon, découvrant l'orifice annulaire et entraînant l'ouverture du clapet.According to a simple and inexpensive embodiment, the valves are constituted by a cylindrical cap of elastic material drilled in its center, fixed on a cylindrical piece forming a support and having an annular orifice surrounding in its center an element coming opposite the hole of the hood and masking the latter. At rest, the front wall of the cap covers the annular orifice and bears on the central element. Thus the valve is closed. An external overpressure plate the wall of the cap against its support and then holds the closed flap. On the contrary, an overpressure internal causes the lifting of the elastic blade of the front wall of the cap, discovering the annular orifice and causing the opening of the valve.

Conformément à une forme préférentielle de réalisation de l'invention, les clapets ont une forme cylindro-conique comprenant un dôme percé en son centre, dont la paroi, en position d'obturation, recouvre la buse de sortie à orifice annulaire dans un plan sensiblement perpendiculaire au flux sortant du fluide. Plus particulièrement, la paroi du clapet, dans sa partie en forme de dôme, vient recouvrir l'orifice annulaire, sensiblement perpendiculairement à son axe, et prend appui sur l'élément central cylindrique se trouvant dans l'axe de l'orifice. Cette disposition permet de combiner le clapet avec un orifice de section relativement importante, tant pour le clapet inférieur d'admission que pour le clapet supérieur d'expulsion.According to a preferred embodiment of the invention, the valves have a cylindro-conical shape comprising a dome pierced at its center, whose wall, in the closed position, covers the annular orifice outlet nozzle in a plane substantially perpendicular to the flow coming out of the fluid. More particularly, the wall of the valve, in its dome-shaped portion, covers the annular orifice, substantially perpendicular to its axis, and bears on the central cylindrical element located in the axis of the orifice. This arrangement allows the valve to be combined with a relatively large section orifice, both for the lower intake valve and the upper expulsion valve.

Les clapets peuvent être réalisés en toute matière présentant les caractéristiques voulues de flexibilité et d'élasticité, et compatible avec les produits contenus dans le flacon. A titre d'exemple, on peut utiliser des clapets en caoutchouc naturel ou synthétique ou en élastomères thermoplastiques, tels que polyesters thermoplastiques, polyuréthannes ou SBS, ou encore en silicones.The valves can be made of any material having the desired characteristics of flexibility and elasticity, and compatible with the products contained in the bottle. By way of example, it is possible to use valves made of natural or synthetic rubber or thermoplastic elastomers, such as thermoplastic polyesters, polyurethanes or SBS, or silicones.

Suivant une forme avantageuse de réalisation de la présente invention, les clapets sont réalisés en une matière dont la dureté Shore A est comprise entre 40 et 80, et de préférence entre 50 et 60.According to an advantageous embodiment of the present invention, the valves are made of a material whose Shore A hardness is between 40 and 80, and preferably between 50 and 60.

Il peut être avantageux, conformément à l'invention, de monter la pompe de manière étanche sur le flacon rigide par l'intermédiaire d'une bague ou d'un capot. Suivant une variante, la pompe est montée directement sur le flacon, par exemple par emboîtement.It may be advantageous, in accordance with the invention, to mount the pump in a sealed manner on the rigid bottle by means of a ring or cover. According to a variant, the pump is mounted directly on the bottle, for example by interlocking.

Suivant une forme avantageuse de réalisation le poussoir comporte des moyens pour limiter sa course et adapter la dose à un volume déterminé. Ces moyens peuvent être réalisés en prévoyant par exemple une ou plusieurs butées placées sur la partie mobile du poussoir et coopérant avec des moyens complémentaires sur la partie fixe, ou en jouant sur la longueur de la partie cylindrique du poussoir, ou encore en insérant un manchon limiteur de course du poussoir sur le support. On peut ainsi disposer de dispositifs de distribution de produits fluides prévus pour procurer des doses différentes de produit, en ne modifiant qu'un seul élément constitutif, ou en insérant un élément complémentaire simple. Un tel système est particulièrement économique.According to an advantageous embodiment, the pusher comprises means for limiting its stroke and adapting the dose to a determined volume. These means can be realized in for example providing one or more stops placed on the moving part of the pusher and cooperating with complementary means on the fixed part, or by playing on the length of the cylindrical portion of the pusher, or by inserting a travel limiter sleeve of the pusher on the support. It is thus possible to provide fluid product dispensing devices intended to provide different doses of product, by modifying only one constituent element, or by inserting a single complementary element. Such a system is particularly economical.

Un circuit d'entrée d'air est prévu pour que l'air extérieur puisse pénétrer dans le flacon et compenser le volume de produit expulsé par la pompe.An air inlet circuit is provided so that outside air can enter the bottle and compensate for the volume of product expelled by the pump.

Dans le cas d'un dispositif du type flacon rigide à poche souple, l'air extérieur doit parvenir dans l'espace séparant la poche souple de la paroi intérieure du flacon rigide afin d'y maintenir une pression suffisante pour que la poche puisse se rétracter à chaque expulsion de produit. Ce circuit d'air est de préférence situé au niveau du poussoir de la pompe, et comporte des moyens pour assurer son obturation lorsque le poussoir est relevé, en position de repos.In the case of a device of the rigid bottle type with a flexible bag, the outside air must reach the space separating the flexible bag from the inside wall of the rigid bottle in order to maintain a sufficient pressure for the bag to reach retract with each expulsion of product. This air circuit is preferably located at the pusher of the pump, and comprises means to ensure its closure when the pusher is raised, in the rest position.

Dans le cas d'un flacon rigide simple, avec ou sans piston racleur, le circuit d'air peut être constitué par une éventation, de préférence dans le fond du flacon.In the case of a single rigid bottle, with or without scraper piston, the air circuit can be constituted by a vent, preferably in the bottom of the bottle.

Ainsi, suivant une forme avantageuse de réalisation, on prévoit, dans le fond du flacon rigide, un évent pourvu d'un clapet, pour éviter toute fuite du produit contenu dans le flacon, et d'un filtre pour empêcher l'introduction de polluants, tels que des bactéries, qui pourraient dégrader le produit à distribuer.Thus, according to an advantageous embodiment, there is provided in the bottom of the rigid bottle, a vent provided with a valve, to prevent leakage of the product contained in the bottle, and a filter to prevent the introduction of pollutants , such as bacteria, which could degrade the product to be dispensed.

Dans la variante comportant un évent dans le fond du flacon, il est préférable de prévoir un tube plongeur prolongeant la pompe dans le flacon, l'extrémité du tube plongeur pouvant se trouver à proximité du fond du flacon.In the variant having a vent in the bottom of the bottle, it is preferable to provide a dip tube extending the pump in the bottle, the end of the dip tube may be close to the bottom of the bottle.

Afin d'assurer une bonne étanchéité de l'ensemble constitué par le flacon, la pompe, et éventuellement la poche souple, y compris dans des situations où cet ensemble se trouverait dans une zone de pression suffisamment faible pour être susceptible de provoquer une ouverture des deux clapets, dans le cas de clapets identiques, et d'entraîner une fuite du produit contenu dans la chambre de dosage et dans le flacon, un capot ou capuchon peut être prévu monté amovible sur la tête de distribution.In order to ensure a good seal of the assembly constituted by the bottle, the pump, and possibly the flexible bag, including in situations where this set would be in a pressure zone sufficiently small to be able to cause an opening of two valves, in the case of identical valves, and cause leakage of the product contained in the metering chamber and in the bottle, a cap or cap may be provided removably mounted on the dispensing head.

Des moyens peuvent être prévus pour assurer l'étanchéité du montage du capuchon sur la tête, et par exemple le capuchon peut être mis en place par emboîtement grâce à une forme complémentaire du bord interne du capuchon et de la base du nez du poussoir le recevant, ce montage étant complété par un joint torique ou des godrons d'étanchéité.Means may be provided for sealing the mounting of the cap on the head, and for example the cap may be inserted by interlocking due to a complementary shape of the inner edge of the cap and the base of the nose of the pusher receiving this assembly being supplemented by an O-ring or sealing gongs.

Un tel accessoire complétant la pompe et son poussoir assure une excellente étanchéité dans toutes les conditions de stockage, même en cas de chute de la pression extérieure, et permet de préserver le produit contenu dans le flacon.Such an accessory completing the pump and its pusher ensures excellent sealing in all storage conditions, even in case of drop in the external pressure, and preserves the product contained in the bottle.

La pompe conforme à la présente invention présente l'avantage de ne comporter qu'un nombre limité de composants, ce qui réduit les coûts de fabrication. Ainsi, la pompe de l'invention ne comporte que 5 ou 6 composants, selon la configuration adoptée ; de plus, les clapets inférieur (admission) et supérieur (expulsion) peuvent être identiques, ce qui permet de réduire encore les outillages nécessaires à la fabrication. A titre de comparaison, les pompes couramment utilisées dans la technique des flacons à poche souple pour produits cosmétiques ou pharmaceutiques comportent généralement entre 15 et 20 composants.The pump according to the present invention has the advantage of having only a limited number of components, which reduces manufacturing costs. Thus, the pump of the invention comprises only 5 or 6 components, depending on the configuration adopted; in addition, the lower (intake) and upper (expulsion) valves can be identical, which further reduces the tools required for manufacturing. By way of comparison, the pumps commonly used in the art of soft-bag flasks for cosmetic or pharmaceutical products generally comprise between 15 and 20 components.

La pompe est généralement réalisée en matière plastique telle que le polyéthylène ou le polypropylène de densité appropriée pour lui conférer les propriétés mécaniques voulues.The pump is generally made of plastic material such as polyethylene or polypropylene of appropriate density to give it the desired mechanical properties.

La poche peut être réalisée en une matière plastique choisie par exemple parmi un polyéthylène, un polypropylène, un polyamide, un copolymère d'éthylène et d'alcool vinylique (EVOH), un polyéthylène basse densité, etc. Il peut s'agir de matières monocouches ou de complexes multicouches incluant une couche métallique, par exemple une couche d'aluminium formant barrière renforçant l'étanchéité, combinée à une ou plusieurs couches de matière plastique.The pouch may be made of a plastic material selected for example from polyethylene, polypropylene, polyamide, ethylene vinyl alcohol copolymer (EVOH), low density polyethylene, and the like. They may be monolayer materials or multilayer complexes including a metal layer, for example an aluminum layer forming a barrier reinforcing the seal, combined with one or more layers of plastic material.

La poche peut être fabriquée à partir de ces matières par des techniques telles que le soufflage en un seul tenant, ce qui présente l'avantage de réduire l'investissement nécessaire à la fabrication. On peut aussi procéder par injection soufflage ou extrusion soufflage d'une paraison dans un moule adapté. On peut également fabriquer la poche par soudage d'un film plastique ou métallique, ou d'un complexe multicouche métal / plastique sur un support formant le col de la poche.The pouch can be made from these materials by techniques such as one-piece blowing, which has the advantage of reducing the investment required for manufacturing. It is also possible by injection blow molding or extrusion blow molding of a parison in a suitable mold. It is also possible to manufacture the bag by welding a plastic or metal film, or a metal / plastic multilayer complex on a support forming the neck of the pocket.

Il peut être avantageux de réaliser la poche en une matière adaptée au produit qu'elle contient. Ainsi, à titre d'exemple, la poche peut être en polyéthylène basse densité quand elle doit contenir une crème peu sensible aux effets du milieu extérieur, tandis qu'elle peut être réalisée en un polyamide procurant une meilleure protection contre les effets de l'oxygène et contre la perte par évaporation de la vapeur d'eau, lorsqu'elle doit contenir un produit plus fragile.It may be advantageous to make the bag in a material adapted to the product it contains. Thus, for example, the bag may be of low density polyethylene when it must contain a cream that is not very sensitive to the effects of the external medium, while it may be made of a polyamide providing better protection against the effects of the oxygen and against the evaporation loss of water vapor, when it must contain a more fragile product.

Les avantages et caractéristiques de la pompe suivant la présente invention apparaîtront dans les exemples non limitatifs de réalisation décrits plus en détail ci-après, en référence aux dessins annexés, qui représentent :

  • Figure 1 : une vue schématique en coupe d'une pompe montée sur le col d'un récipient rigide, présentée en position de repos, poussoir relevé.
  • Figures 2a et 2b : une vue en coupe partielle d'un dispositif de distribution de produits fluides, liquides ou pâteux, comprenant une pompe suivant la Figure 1 montée sur un simple flacon, le poussoir étant en position haute (Fig. 2a) ou basse (Fig. 2b).
  • Figures 3a et 3b : une vue en coupe partielle d'une variante du dispositif de la Figure 2 où le poussoir, en position haute sur la Fig. 3a et en position basse sur la Fig. 3b, est adapté à l'expulsion d'une petite dose de produit.
  • Figures 4 a et 4b : une vue en coupe partielle d'une autre variante du dispositif de la Figure 2 où la course du poussoir, en position haute sur la Fig. 4a et en position basse sur la Fig. 4b, est limitée par un manchon.
  • Figure 5 : une vue en coupe d'une variante du dispositif de la Figure 1, comportant un tube plongeur et un évent au fond du flacon.
  • Figure 6 : une vue agrandie en coupe du nez de distribution du poussoir portant un capuchon d'obturation étanche.
  • Figure 7 : une vue agrandie en coupe d'une variante de réalisation du poussoir de la Figure 6.
The advantages and characteristics of the pump according to the present invention will appear in the nonlimiting examples of embodiment described in more detail below, with reference to the appended drawings, which represent:
  • Figure 1 is a schematic sectional view of a pump mounted on the neck of a rigid container, presented in the rest position, lifted push.
  • 2a and 2b: a partial sectional view of a device for dispensing liquid, liquid or pasty products, comprising a pump according to FIG. single bottle, the pusher being in the high position (Fig. 2a) or low (Fig. 2b).
  • Figures 3a and 3b: a partial sectional view of a variant of the device of Figure 2 where the pusher, in the upper position in FIG. 3a and in the low position in FIG. 3b, is suitable for the expulsion of a small dose of product.
  • Figures 4a and 4b: a partial sectional view of another variant of the device of Figure 2 where the stroke of the pusher, in the up position in FIG. 4a and in the low position in FIG. 4b, is limited by a sleeve.
  • Figure 5 is a sectional view of a variant of the device of Figure 1, comprising a dip tube and a vent at the bottom of the bottle.
  • Figure 6 is an enlarged sectional view of the pusher dispensing nose with a sealing cap.
  • Figure 7 is an enlarged sectional view of an alternative embodiment of the pusher of Figure 6.

La pompe (1) représentée sur la Figure 1 est montée sur le corps (2) d'un flacon rigide par l'intermédiaire d'un capot (3). A cet effet, le capot (3) comporte un trou cylindrique (4) dans lequel vient se loger le corps (5) de la pompe (1) qui peut y coulisser.The pump (1) shown in Figure 1 is mounted on the body (2) of a rigid bottle through a cover (3). For this purpose, the cover (3) has a cylindrical hole (4) in which is housed the body (5) of the pump (1) which can slide there.

La chambre (6) de la pompe (1) est délimitée par le clapet inférieur (7), ou clapet d'admission, et le clapet supérieur (8), ou clapet d'expulsion. Les deux clapets (7) et (8) sont identiques mais montés en opposition, comme indiqué ci-après, c'est-à-dire que le clapet d'admission se ferme quand le clapet d'expulsion s'ouvre, et inversement, en fonction des mouvements de la pompe. Comme le montre la Figure 1, le clapet supérieur (8) est monté à l'extrémité de la buse de sortie de la pompe.The chamber (6) of the pump (1) is delimited by the lower valve (7), or intake valve, and the upper valve (8), or expulsion valve. The two valves (7) and (8) are identical but mounted in opposition, as indicated below, that is to say that the inlet valve closes when the expulsion valve opens, and conversely , depending on the movements of the pump. As shown in Figure 1, the upper valve (8) is mounted at the end of the pump outlet nozzle.

La partie supérieure du corps de la pompe présente la forme d'un poussoir (9) permettant à l'utilisateur d'actionner la pompe à partir de la position représentée sur la Figure 1, en enfonçant le poussoir (9) contre le ressort hélicoïdal métallique (10) placé à l'extérieur de la chambre, de telle sorte qu'il n'entre pas en contact avec le produit sortant de la poche. Dans ce mouvement, le corps de la pompe coulisse dans le trou cylindrique (4) du capot (3), jusqu'à ce que l'extrémité inférieure (11) du corps (5) de la pompe vienne prendre appui contre la collerette (12) solidaire du tube (13) portant le clapet inférieur (7).The upper part of the pump body is in the form of a pusher (9) allowing the user to actuate the pump from the position shown in Figure 1 by pressing the pusher (9) against the coil spring. metal (10) placed outside the chamber, so that it does not come into contact with the product exiting the pocket. In this movement, the body of the pump slides in the cylindrical hole (4) of the cover (3), until the lower end (11) of the body (5) of the pump comes to bear against the collar ( 12) integral with the tube (13) carrying the lower valve (7).

Dans ce mouvement de descente du poussoir (9), le clapet inférieur (7) reste fermé tandis que le clapet supérieur (8) est ouvert, laissant sortir le produit se trouvant dans la chambre (6).In this downward movement of the pusher (9), the lower valve (7) remains closed while the upper valve (8) is open, leaving the product in the chamber (6).

Lorsque l'utilisateur relâche la pression sur le poussoir (9), le corps (5) de la pompe (1) remonte sous l'action du ressort (10) jusqu'à ce que la retenue circulaire (14) vienne en contact contre la butée (15) formée sur la paroi interne du trou cylindrique (4) dans le capot (3).When the user releases the pressure on the pusher (9), the body (5) of the pump (1) rises under the action of the spring (10) until the circular retainer (14) comes into contact against the abutment (15) formed on the inner wall of the cylindrical hole (4) in the cover (3).

Dans ce mouvement de remontée du poussoir (9), le clapet supérieur (8) reste fermé tandis que le clapet inférieur (7) est ouvert, laissant pénétrer dans la chambre (6) le produit se trouvant dans la poche (16).In this upward movement of the pusher (9), the upper valve (8) remains closed while the lower valve (7) is open, allowing the product in the pocket (16) to enter the chamber (6).

La poche (16) est fixée par son col (17) à la base du tube (13), et repose sur l'épaulement (18) formé sur le corps (2) du flacon. La fixation du col (17) sur le tube (13) peut être faite par soudage aux ultrasons. La petite dimension du col (17) de la poche, soit moins du tiers de la section du flacon, facilite sa fabrication par simple technique de soufflage.The pocket (16) is fixed by its neck (17) to the base of the tube (13), and rests on the shoulder (18) formed on the body (2) of the bottle. The attachment of the neck (17) to the tube (13) can be done by ultrasonic welding. The small size of the neck (17) of the pocket, less than a third of the section of the bottle, facilitates its manufacture by simple blowing technique.

La pompe étant étanche, ainsi que sa fixation sur le col (17) de la poche (16), un circuit d'entrée d'air est prévu pour que l'air extérieur puisse pénétrer dans l'espace séparant la poche de la paroi intérieure du flacon afin d'y maintenir une pression suffisante pour que la poche puisse se rétracter à chaque expulsion de produit. Ce circuit d'air est matrialisé par l'espace entre la partie extérieure du corps (5) et la paroi interne du trou cylindrique (4), formant un canal laissant passer l'air entre les parois de la pompe et du trou cylindrique. Ce canal est ouvert lorsque le poussoir est actionné, et il est fermé lorsque le poussoir est relevé car dans cette position, la nervure annulaire (19) vient prendre appui contre le bord du trou cylindrique (4) et obture le canal.The pump being sealed, as well as its fixing on the neck (17) of the pocket (16), an air inlet circuit is provided so that the outside air can penetrate into the space separating the pocket from the wall inside the bottle in order to maintain sufficient pressure so that the bag can retract with each expulsion of product. This air circuit is matrialized by the space between the outer part of the body (5) and the inner wall of the cylindrical hole (4), forming a channel allowing air to pass between the walls of the pump and the cylindrical hole. This channel is open when the pusher is actuated, and it is closed when the pusher is raised because in this position, the annular rib (19) abuts against the edge of the cylindrical hole (4) and closes the channel.

Les essais effectués avec un dispositif tel que représenté sur la Figure 1, comportant une pompe suivant l'invention, ont mis en évidence une excellente régularité de dosage, et des taux de restitution de l'ordre de 90 à 95% dans le cas de crèmes, selon leur viscosité, et supérieurs à 95% dans le cas de liquides.Tests carried out with a device as represented in FIG. 1, comprising a pump according to the invention, have demonstrated an excellent regularity of dosage, and restitution rates of the order of 90 to 95% in the case of creams, according to their viscosity, and greater than 95% in the case of liquids.

De plus, l'amorçage de la pompe lors de la première utilisation peut être obtenu en 3 ou 4 pressions seulement sur le poussoir.In addition, the priming of the pump during the first use can be obtained in 3 or 4 pressures only on the pusher.

La Figure 2 représente la pompe de la Figure 1 montée de manière étanche sur un simple flacon rigide pour produits fluides, de préférence pour liquides, où la pompe est prolongée dans le flacon par un tube plongeur.Figure 2 shows the pump of Figure 1 sealingly mounted on a single rigid bottle for fluid products, preferably for liquids, where the pump is extended in the bottle by a dip tube.

Le poussoir de la pompe de la Figure 2a est en position haute, et la retenue circulaire (14) située à la base du poussoir est alors en contact avec l'épaulement formant butée (15) sur la face interne du trou cylindrique recevant le poussoir. Lorsque l'utilisateur presse le poussoir contre le ressort (10) de compression, la base (11) du poussoir vient contre la collerette (12) formant le fond du trou cylindrique (4) comme représenté sur la Figure 2b. La course H1 du poussoir est indiquée sur la Figure 2a et est égale à la distance séparant la collerette (12) de la base (11) du poussoir en position relevée.The pusher of the pump of Figure 2a is in the up position, and the circular retainer (14) located at the base of the pusher is then in contact with the abutment shoulder (15) on the inner face of the cylindrical hole receiving the pusher . When the user presses the pusher against the compression spring (10), the base (11) of the pusher comes against the flange (12) forming the bottom of the cylindrical hole (4) as shown in Figure 2b. The stroke H1 of the pusher is indicated in FIG. 2a and is equal to the distance separating the flange (12) from the base (11) of the pusher in the raised position.

Le mouvement de descente du poussoir provoque l'ouverture du clapet (8) et l'expulsion du produit se trouvant dans la chambre de dosage (6), tandis que le clapet d'admission (7) reste fermé sous l'action de la surpression dans la chambre.The downward movement of the pusher causes the opening of the valve (8) and the expulsion of the product in the metering chamber (6), while the inlet valve (7) remains closed under the action of the overpressure in the room.

Lorsque l'utilisateur relâche ensuite le poussoir, celui-ci remonte sous l'action du ressort (10) et la dépression ainsi créée dans la chambre (6) provoque l'ouverture du clapet d'admission (7) et l'entrée de produit provenant du flacon par le tube plongeur (20), tandis que le clapet supérieur (8) reste fermé. La chambre de dosage (6) se remplit ainsi d'une dose de produit qui est prête à être expulsée lorsque l'utilisateur actionnera à nouveau le poussoir. Cette dose de produit reste à l'abri de l'air extérieur grâce à l'étanchéité du clapet supérieur (8). De plus, en raison de la position du clapet supérieur (8) aucune quantité résiduelle de produit ne reste en contact avec l'atmosphère extérieure, ce qui limite les risques d'obturation de l'orifice de sortie par des accumulations de matière.When the user then releases the pusher, it goes up under the action of the spring (10) and the depression thus created in the chamber (6) causes the opening of the inlet valve (7) and the inlet of product from the bottle through the dip tube (20), while the upper valve (8) remains closed. The metering chamber (6) thus fills with a dose of product that is ready to be expelled when the user will operate the pusher again. This dose of product remains protected from outside air thanks to the tightness of the upper valve (8). In addition, because of the position of the upper valve (8) no residual amount of product remains in contact with the external atmosphere, which limits the risk of closure of the outlet orifice by accumulations of material.

Sur la forme de réalisation représentée sur la Figure 3a, la base cylindrique du poussoir est prolongée au-delà de la retenue circulaire (14), et la hauteur H2 séparant la base (11) du poussoir du fond (12) de la collerette est alors plus réduite. La course du piston est limitée à la hauteur H2, si bien que la pression sur le poussoir ne provoque l'expulsion que d'une dose partielle hors de la chambre (6).In the embodiment shown in FIG. 3a, the cylindrical base of the pusher is extended beyond the circular retainer (14), and the height H2 separating the base (11) from the bottom pusher (12) of the collar is then smaller. The stroke of the piston is limited to the height H2, so that the pressure on the pusher causes the expulsion of a partial dose out of the chamber (6).

Une forme de réalisation équivalente est représentée sur la Figure 4a, où le poussoir (9) est identique à celui de la Figure 2a, mais sa course est limitée par une bague cylindrique (21) placée dans le fond du trou cylindrique, sur la base de la collerette (12). La course H3 du poussoir est alors égale à la course H1 du dispositif de la Figure 2a, diminuée de la hauteur de la bague cylindrique (21).An equivalent embodiment is shown in Figure 4a, where the pusher (9) is identical to that of Figure 2a, but its stroke is limited by a cylindrical ring (21) placed in the bottom of the cylindrical hole, on the base of the collar (12). The stroke H3 of the pusher is then equal to the stroke H1 of the device of FIG. 2a, minus the height of the cylindrical ring (21).

La Figure 5 représente un flacon rigide (2) portant la pompe (1) de l'invention comportant les deux clapets (7) et (8) et le poussoir (9). le flacon (2) est complété par un système d'éventation (22).Figure 5 shows a rigid bottle (2) carrying the pump (1) of the invention comprising the two valves (7) and (8) and the pusher (9). the bottle (2) is completed by a venting system (22).

Le système d'éventation comprend un bouchon (23) inséré dans un trou prévu dans le fond du flacon (2), et portant un filtre (24) et un clapet (25) de type usuel. Le clapet est conçu de manière à ne laisser entrer l'air extérieur dans le flacon que lorsqu'une dépression se forme dans ce dernier, c'est-à-dire quand une dose de produit est aspirée par le tube plongeur (20) du flacon vers la chambre de dosage (6).The venting system comprises a plug (23) inserted in a hole provided in the bottom of the bottle (2), and carrying a filter (24) and a valve (25) of the usual type. The flapper is designed to allow the outside air to enter the bottle only when a depression is formed in the latter, that is to say when a dose of product is sucked by the dip tube (20) of the bottle to the dosing chamber (6).

Ainsi de l'air est introduit dans le flacon (2) à chaque actionnement du poussoir (9) de la pompe (1) pour compenser le volume de la dose expulsée, sans contaminer le produit contenu dans le flacon, grâce au filtre (24).Thus air is introduced into the bottle (2) each time the pusher (9) of the pump (1) is used to compensate for the volume of the expelled dose, without contaminating the product contained in the bottle, thanks to the filter (24). ).

La Figure 6 montre le détail du clapet supérieur (8) portant un capuchon (26) monté de manière étanche sur le nez du poussoir (9). L'étanchéité est obtenue au moyen d'une nervure (27) coopérant avec la base du capuchon cylindrique (26) réalisé en matière élastique. Elle est complétée par les nervures (28) formée sur la base cylindrique du clapet supérieur (8). Le capuchon (26) enveloppe ainsi totalement le clapet (8), assurant une obturation étanche du dispositif.Figure 6 shows the detail of the upper valve (8) carrying a cap (26) sealingly mounted on the nose of the pusher (9). The seal is obtained by means of a rib (27) cooperating with the base of the cylindrical cap (26) made of elastic material. It is completed by the ribs (28) formed on the cylindrical base of the upper valve (8). The cap (26) completely envelops the valve (8), sealing the device.

Comme le montre la Figure 6, la buse de sortie de produit comprend un orifice annulaire (29) entourant un élément cylindrique (30) qui se trouve en regard du trou (31) formé dans la face frontale du clapet (8). En position d'obturation, la face frontale du clapet (8) s'applique sur l'élément cylindrique (30) et masque l'orifice annulaire (29). En raison de la flexibilité et de l'élasticité de la matière constituant le clapet (8), une surpression dans le conduit de l'orifice (29) provoque l'écartement du bord du clapet autour du trou central (31), laissant passer le produit sortant de la chambre de dosage (6). Le capuchon étanche (26), en masquant le nez du poussoir (9), empêche qu'une éventuelle chute de pression extérieure ne provoque le même phénomène, et assure donc la sécurité du produit contenu dans le flacon, au stockage.As shown in Figure 6, the product outlet nozzle comprises an annular orifice (29) surrounding a cylindrical member (30) which is opposite the hole (31) formed in the front face of the valve (8). In the closed position, the end face of the valve (8) is applied to the cylindrical element (30) and masks the annular orifice (29). Because of the flexibility and elasticity of the material constituting the valve (8), an overpressure in the conduit of the orifice (29) causes the separation of the edge of the valve around the central hole (31), passing through the product leaving the metering chamber (6). The watertight cap (26), by masking the nose of the pusher (9), prevents a possible drop in external pressure causes the same phenomenon, and thus ensures the safety of the product contained in the bottle, storage.

Sur la variante de réalisation représentée sur la Figure 7, l'élément cylindrique (30) dans l'axe de l'orifice annulaire (29), comporte sur sa face avant une protubérance (32) cylindrique de même axe que l'élément cylindrique (30). Cette protubérance forme avec la face avant de l'élément cylindrique, un épaulement coopérant avec le bord le l'orifice central du clapet (8), de telle sorte que la surface frontale de la protubérance cylindrique (32) soit dans le prolongement de la surface du clapet (8).In the variant embodiment shown in FIG. 7, the cylindrical element (30) in the axis of the annular orifice (29) has on its front face a cylindrical protrusion (32) of the same axis as the cylindrical element. (30). This protuberance forms with the front face of the element cylindrical, a shoulder cooperating with the edge the central orifice of the valve (8), so that the front surface of the cylindrical protuberance (32) is in line with the surface of the valve (8).

Cette forme de réalisation permet de guider le flux de fluide sortant de l'orifice (29), même si les bords du clapet ne se soulèvent pas de manière parfaitement symétrique par rapport à l'axe de l'orifice annulaire (29).This embodiment makes it possible to guide the flow of fluid leaving the orifice (29), even if the edges of the valve do not lift perfectly symmetrically with respect to the axis of the annular orifice (29).

Claims (14)

  1. A manually actuated metering pump (1) for a rigid bottle (2), of the double-valve type, comprising an intake lower valve (7) and an expulsion upper valve (8) at the inlet and at the outlet, respectively, of a metering chamber (6) that is mounted so as to slide on the lower valve (7), characterized in that the lower valve (7) and the upper valve (8) are identical.
  2. The metering pump as claimed in claim 1, characterized in that the valves are of cylindro-conical shape, comprising a dome pierced at its center, the wall of which, in the closure position, covers an annular outlet orifice.
  3. The metering pump as claimed in either of claims 1 and 2, characterized in that the lower valve (7) is fixed to a hollow tube (13) that communicates with the inside of the bottle.
  4. The metering pump as claimed in any one of the preceding claims, characterized in that the upper valve (8) is mounted on the end of the outlet nozzle of the pump and constitutes an outermost closure.
  5. The metering pump as claimed in any one of the preceding claims, characterized in that the valves are made of a material having a Shore A hardness of between 40 and 80.
  6. The metering pump as claimed in any one of the preceding claims, characterized in that it includes means (11, 21) for limiting the travel of the pusher.
  7. The metering pump as claimed in claim 1, characterized in that it is sealably mounted on the rigid body (2) via a ring or a cap (3).
  8. The metering pump as claimed in any one of claims 1 to 6, characterized in that it is mounted directly on the rigid bottle (2).
  9. The metering pump as claimed in any one of claims 1 to 6, characterized in that it is mounted on the neck (17) of a flexible pouch (16) placed in the rigid bottle (2).
  10. The metering pump as claimed in claim 9, characterized in that it includes an air inlet circuit for air to enter the space separating the flexible pouch (16) from the inner wall of the rigid bottle (2).
  11. The metering pump as claimed in claim 10, characterized in that the air inlet circuit is located level with the pusher of the pump, and comprises means (19) for ensuring that it is closed off when the pusher (9) is raised, in the rest position.
  12. The metering pump as claimed in any one of claims 1 to 8, characterized in that it is sealably mounted on the neck of the rigid bottle (2), the bottom of which includes a vent (22).
  13. The metering pump as claimed in claim 12, characterized in that the vent (22) is provided with a valve (25) and with a filter (24).
  14. A device for packaging and dispensing fluid, liquid or pasty products, characterized in that it comprises a metering pump as claimed in any one of the preceding claims, associated with a rigid bottle.
EP03813191A 2002-12-13 2003-11-15 Manually-actuated metering pump Expired - Lifetime EP1572375B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0215854A FR2848618B1 (en) 2002-12-13 2002-12-13 MANUAL ACTUATING PUMP PUMP
FR0215854 2002-12-13
PCT/FR2003/003725 WO2004054721A1 (en) 2002-12-13 2003-11-15 Manually-actuated metering pump

Publications (2)

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EP1572375A1 EP1572375A1 (en) 2005-09-14
EP1572375B1 true EP1572375B1 (en) 2006-06-21

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EP (1) EP1572375B1 (en)
JP (1) JP4358114B2 (en)
KR (1) KR101024348B1 (en)
CN (1) CN100464871C (en)
AT (1) ATE330710T1 (en)
AU (1) AU2003300614A1 (en)
CA (1) CA2507610C (en)
DE (1) DE60306421T2 (en)
ES (1) ES2265608T3 (en)
FR (1) FR2848618B1 (en)
WO (1) WO2004054721A1 (en)

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ATE330710T1 (en) 2006-07-15
CN1726090A (en) 2006-01-25
KR101024348B1 (en) 2011-03-23
US20060249540A1 (en) 2006-11-09
ES2265608T3 (en) 2007-02-16
WO2004054721A1 (en) 2004-07-01
JP4358114B2 (en) 2009-11-04
DE60306421T2 (en) 2007-02-01
CA2507610A1 (en) 2004-07-01
FR2848618B1 (en) 2006-06-09
CA2507610C (en) 2012-07-24
KR20050085640A (en) 2005-08-29
FR2848618A1 (en) 2004-06-18
JP2006509624A (en) 2006-03-23
US7481336B2 (en) 2009-01-27
DE60306421D1 (en) 2006-08-03
CN100464871C (en) 2009-03-04
EP1572375A1 (en) 2005-09-14
AU2003300614A1 (en) 2004-07-09

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