EP1385633B1 - Metering pump - Google Patents

Metering pump Download PDF

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Publication number
EP1385633B1
EP1385633B1 EP02730397A EP02730397A EP1385633B1 EP 1385633 B1 EP1385633 B1 EP 1385633B1 EP 02730397 A EP02730397 A EP 02730397A EP 02730397 A EP02730397 A EP 02730397A EP 1385633 B1 EP1385633 B1 EP 1385633B1
Authority
EP
European Patent Office
Prior art keywords
pump body
dose chamber
annular valve
metering pump
dose
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
EP02730397A
Other languages
German (de)
French (fr)
Other versions
EP1385633A1 (en
Inventor
Daniel Crosnier
Jean-Marie Dulery
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.)
Crosnier Daniel
DULERY, JEAN-MARIE
Original Assignee
Crosnier Daniel
Dulery Jean-Marie
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Filing date
Publication date
Application filed by Crosnier Daniel, Dulery Jean-Marie filed Critical Crosnier Daniel
Publication of EP1385633A1 publication Critical patent/EP1385633A1/en
Application granted granted Critical
Publication of EP1385633B1 publication Critical patent/EP1385633B1/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
    • B05B11/10—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
    • B05B11/1023—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem
    • 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
    • B05B11/1052—Actuation means
    • B05B11/1053—Actuation means combined with means, other than pressure, for automatically opening a valve during actuation; combined with means for automatically removing closures or covers from the discharge nozzle during actuation
    • 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
    • B05B11/1064—Pump inlet and outlet valve elements integrally formed of a deformable material
    • 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
    • B05B11/1076—Traction springs, e.g. stretchable sleeve
    • 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
    • B05B11/1094—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 having inlet or outlet valves not being actuated by pressure or having no inlet or outlet valve
    • 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
    • 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
    • B05B11/028—Pistons separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container

Definitions

  • the present invention relates to a metering pump intended to be mounted in particular by screwing, latching, welding, etc. .... on various rigid or flexible containers such as bottles, tubes or pots, in particular containers containing cosmetic products or pharmaceutical products or even food products of different viscosities ranging from liquid products to products having the consistency of creams.
  • EP-0 726 097 metering pumps comprising a pump body made of a rigid or semi-rigid material adaptable to a container and enclosing a dose chamber and elastically deformable control means operable from the outside and capable of being successively moved between a position of distribution and a rest position so as to allow the expulsion of a dose of product from the dose chamber to the outside through an expulsion opening and the transfer of a new dose of product from the container to the dose chamber and and so on.
  • the pump body of such metering pumps is generally delimited at its inner part by an annular side wall and by a front face having a filling opening which communicates with the interior of the container.
  • control means are automatically recalled from the dispensing position to the rest position in the absence of any external stress exerted on them, creating a vacuum allowing the aspiration of a dose from product to the dose chamber.
  • the document FR-A-1441127 discloses for its part a type of metering pump using a gas under low pressure.
  • the features of the preamble of claim 1 are known from this document FR-A-1441127 .
  • the dosing of high viscosity products is not always easy and the elastically deformable control means sometimes have difficulty returning to their original shape when they are transferred from the dispensing position to the rest position, which can cause some recovery of outside air.
  • the object of the present invention is to remedy these drawbacks by proposing a simple, efficient and reliable metering pump which, at the same time, makes it possible to dose products which are not only liquid but which can also have a relatively high viscosity, while creating high volume doses.
  • the invention relates to a metering pump of the aforementioned type, characterized in that the control means are constituted by a pusher made of a rigid or semi-rigid material, by a piston made of a flexible thermoplastic material capable of sliding relative to the pusher and with respect to the pump body being in permanent contact with these two elements as well as by an annular valve made of an elastically deformable material constantly bearing against the pusher.
  • the displacement of the control means between the rest position and the dispensing position takes place in two steps, namely on the one hand a first step in which the pusher slides relative to the piston in the pump body and the dose chamber is isolated from the expulsion opening, and secondly a second step in which the plunger and the piston slide integrally into the pump body and a dispensing opening allowing the setting communication of the dose chamber and expulsion opening is cleared.
  • the delayed release of the dispensing opening corresponds to a very advantageous characteristic of the invention since it facilitates to a large extent the priming of the metering pump during the first uses.
  • the pusher comprises a bearing face and a median rod which is constantly resting against the annular valve and is surrounded by a channel annular expulsion delimited by a tubular wall and which communicates with the expulsion opening.
  • the piston comprises a tubular tip mounted around the central rod of the pusher at the free end thereof and extending at its outer periphery by a peripheral fin so as to define a stop surface for the free end of the tubular wall of the pusher during the second step of moving it between the rest position and the dispensing position.
  • This piston is in permanent contact on the one hand with the pusher by a first sealing lip constantly bearing against the outer face of the annular expulsion channel, and on the other hand with the pump body by a second lip of constantly sealing against the annular side wall thereof.
  • the annular valve is disposed between the front face of the pump body and the free end of the central rod of the pusher.
  • This annular valve comprises a substantially circular expandable closure membrane which is constantly resting against the free end of the central rod of the pusher by its median portion and is capable of bearing against the annular side wall of the pump body by its periphery in order to close the filling opening.
  • the closure membrane cooperates with the annular side wall of the pump body and with a closing wall of the piston, contiguous with the second sealing lip to define the dose chamber.
  • the tubular tip of the piston abuts against the closing diaphragm of the annular valve in the rest position and during the first step of displacement between the rest position and the dispensing position to close the dose chamber and away from it during the second stage of this movement to clear the dispensing opening and allow the passage of the product contained in the dose chamber between this tip and the central rod of the pusher, and its evacuation through the expulsion channel and by the opening of expulsion.
  • the median rod of the pusher may be equipped at its free end with at least one longitudinal groove and preferably with a series of longitudinal grooves uniformly distributed over its periphery.
  • These grooves have the function of allowing the passage of the product contained in the dose chamber between the tubular tip of the piston and the central rod of the pusher to allow its expulsion outwards.
  • the annular valve is constituted by a cylindrical ring of which one of the end faces is closed by the closure membrane.
  • this membrane projects on the periphery of the cylindrical ring in order to define a flange capable of bearing against the annular side wall of the pump body in order to isolate the dose chamber from the internal part of the container during the displacement of the dosing pump from the rest position to the dispensing position.
  • this collar deviates from the annular side wall of the pump body so as to allow the filling of the dose chamber.
  • the elastic deformation of the closing membrane of the annular valve creates a seal for hermetically isolating the dose chamber from the inner part of the container. while creating a spring effect allowing the automatic return of the pusher in the rest position.
  • This insulation of the dose chamber makes it possible to evacuate the product contained therein under the action of its compression as a result of bringing the closing wall of the piston and the closing diaphragm of the annular valve which come in contact at the end of distribution.
  • the front face of the pump body comprises receiving members of the annular valve.
  • These receiving members may advantageously be constituted by a tubular sleeve surrounding the filling opening and provided with radial slots shaped wedges allowing the passage of the product contained in the container to the dose chamber when the dosing pump is recalled from the position of distribution to the rest position.
  • the internal, conical face of this tubular sleeve acts as a seat for the closure membrane while the external face, cylindrical thereof cooperates with the pump body to define a receiving housing of the cylindrical ring of the annular valve.
  • the side wall of the pump body is equipped with an obliquely inclined shoulder forming a seat for the collar of the annular valve and extending to the right of the receiving housing of the cylindrical ring by a series of slots defining passages allowing the transfer of the product contained in the container to the dose chamber when the dosing pump is returned from the dispensing position to the rest position.
  • the metering pump essentially consists of a pump body 1 shown in Figures 5a, 5b and 5c which is mounted on a container R.
  • This pump body 1 comprises at its inner part an annular lateral wall 100 of substantially cylindrical shape and a front face 101 pierced with a filling opening 25 which communicates with the interior of the container R.
  • the pump body 1 encloses a pusher 2, a piston 3 and an annular valve 4 elastically deformable.
  • the pusher 2 comprises a bearing surface 5 on which the user can exert a pressure along the arrow F and a median rod 6 whose periphery is equipped with longitudinal grooves 7 at its free end 8.
  • the median rod 6 of the pusher 2 is surrounded by an expulsion channel 9 which is delimited by a tubular wall 10.
  • the expulsion channel 9 communicates with an opening 11 allowing the expulsion of the product contained in the container R in a manner to be described in more detail later in this discussion.
  • the piston 3 which is inserted between the pump body 1 and the pusher 2 comprises meanwhile a tubular nozzle 12 which is mounted around the central rod 6 of the pusher 2 near the free end 8 thereof and is extends at its outer periphery by a peripheral fin 13 so as to define an abutment surface 14 for the free end 80 of the tubular wall 10 of the pusher 2.
  • the pusher 2 can slide to the inner portion of the pump body 1 between a rest position shown on the left side of the figure and a dispensing position shown on the right side thereof.
  • the piston 3 can also slide along the pump body 1 and also along the pusher 2 and is in permanent contact with these two elements 1 and 2 on the one hand by a first annular sealing lip 15 constantly bearing against the outer face of the expulsion channel 9 of the pusher 2 and secondly by a second sealing lip 16 constantly bearing against the annular side wall 100 of the pump body 1.
  • the annular valve 4 is inserted between the pusher 2 and the piston 3 on the one hand and the end face 101 of the pump body 1 on the other hand and is constituted by a cylindrical ring 18 of which one of the end faces is closed by a closure membrane 20 of circular shape.
  • This membrane 20 projects on the periphery of the cylindrical ring 18 to define a flange 21 capable of bearing against the annular side wall 100 of the pump body 1.
  • the median part of the closure membrane 20 of the annular valve 4 is constantly resting against the end 8 of the median rod 6 of the pusher 2, and can be deformed elastically by it as shown on the right side of this figure.
  • the side wall 100 of the pump body 1, the closing membrane 20 of the valve 4 and a closing wall 33 of the piston 3 situated between the second sealing lip 16 and the end 17 of the tubular endpiece 12 cooperate to delimit a dose chamber 32 whose role will be described in more detail later in this presentation.
  • This dose chamber is permanently hermetically closed by the second sealing lip 16 and can be isolated from the outside and the inner part of the container R on the one hand by the free end 17 of the tubular end piece 12 of the piston 3 bearing against the closing membrane 20 of the valve 4 and secondly by the collar 21 bearing against the side wall 100 of the pump body 1.
  • the end face 101 of the pump body 1 is equipped with receiving members 23 of the annular valve 4.
  • these receiving members 23 comprise a tubular sleeve 24 surrounding the filling opening 25 for communicating the pump body 1 with the inner part of the container R.
  • This tubular sleeve 24 has an outer face 26 of cylindrical shape and an inner face 27 of conical shape inclined towards the filling opening 25 and is equipped with radial slots 28 in the form of corners.
  • the conical inner face 27 of the tubular sleeve 24 acts as a seat for the closing membrane 20 of the annular valve 4.
  • the cylindrical outer surface 26 of the tubular sleeve 24 cooperates with the pump body 1 so as to define a receiving housing 29 of the cylindrical ring 18 of the annular valve 4.
  • the side wall 100 of the pump body 1 is equipped with an obliquely inclined shoulder forming a seat for the collar 21 of the annular valve 4.
  • This shoulder 30 extends to the right of the receiving housing 29 towards the end face 101 of the pump body 1 by a series of longitudinal slots 31 defining lateral passages for the product contained in the container R towards the dose chamber 32.
  • the longitudinal slots 31 are extended by transverse slots 34 provided on the front face 22 of the pump body 1 whose role will be specified in the following of this presentation.
  • the container R is made of glass, in particular by blowing or a thermoplastic material by extrusion, blowing, injection-blowing ...
  • the pump body 1 is equipped with a dip tube 35 extending to the bottom of the container R so as to allow the suction of the product contained therein.
  • the body 1 is further equipped with an opening 36 allowing the passage of compensating air from the outside to the inside of the container R.
  • the container R 1 is associated with a piston 37 mounted at the bottom thereof and able to move upwards as indicated by the arrow by sliding inside the container R 1 in proportion to the dose of product discharged to the outside.
  • the container R 2 is equipped at its inner portion with a retractable pocket 38 retractable proportionally to the dose of product discharged to the outside as indicated by the arrows shown in this figure.
  • the retractable pocket 38 can be attached to either the container R 2 or to the pump body 1.
  • the containers R 1 and R 2 are provided with an opening 39 in contact with the atmosphere at their lower part, but it is not necessary to provide an outside air intake similar to the air intake 36 (Figure 5a) on the pump body 1.
  • the pusher 2 In the rest position shown on the left-hand part of FIG. 1, the pusher 2 is offset at the maximum upwards and the lower end 80 of the tubular wall 10 does not rest against the abutment surface 14 of the piston. 3 but located some distance from it.
  • the dose chamber 32 contains a dose of product and is hermetically closed by the second sealing lip 16, by the collar 21 of the annular valve 4 and by the end 17 of the tubular nozzle 12 of the piston 3 which bears against the middle part of the closing membrane 20 of the annular valve 4.
  • this displacement occurs in two stages: in a first step, the pusher 2 slides along the piston 3, until the lower end 80 of the tubular wall 10 bears against the abutment surface 14 and the descent effect of the middle rod 6 pushes the closing membrane 20 of the annular valve 4 while the piston 3 is still without movement so that this closing membrane 20 moves away from the free end 17 of the nozzle tubular 12 to create a dispensing opening 42.
  • the dispensing opening 42 is disengaged and the product present in the chamber dose 32 can be evacuated towards the expulsion opening 11 as shown schematically by the arrows a represented in phantom first passing between the tubular end piece 12 of the piston 3 and the central rod 6 of the pusher 2, penetrating the longitudinal grooves 7 of this rod 6 and then in the annular expulsion channel 9.
  • the pusher 2 is automatically recalled in the rest position shown on the left-hand part of FIG. 1 following the elasticity of the closure membrane 20 of the annular valve 4.
  • This depression causes the flange 21 of the shoulder 30 of the side wall 100 of the pump body 1 to rise and the suction towards the dose chamber 32 of the product contained in the container R by the radial wedge-shaped slits 28 of the annular sleeve 24 and by the slots 31 and 34 as shown schematically by the arrows b shown as mixed lines.
  • the dose chamber 32 is thus automatically filled and the user can again exert a traction F on the support surface 5 of the pusher 2 to empty the chamber 32 and release a dose of product and so on.

Abstract

The invention relates to a metering pump comprising a pump barrel (1) housing a dose chamber (32) and control means that can be moved between a discharge position and a rest position. The inventive metering pump is characterised in that the control means comprise: a push rod (2); a piston (3) that can slide in relation to the push rod (2) and in relation to the pump barrel (1) all the while remaining in permanent contact with said two elements; and an elastically-deformable annular valve (4) that rests permanently against the push rod (2). The control means are moved between the rest position and the discharge position in two steps: the push rod (2) slides in relation to the piston (3) in the pump barrel; and subsequently the push rod (2) and the piston (3) slide jointly in the pump barrel (1) and a discharge opening (42) is released.

Description

La présente invention a pour objet une pompe doseuse destinée à être montée notamment par vissage, encliquetage, soudage, etc.... sur des récipients divers rigides ou souples tels que flacons, tubes ou pots, en particulier des récipients contenant des produits cosmétiques ou pharmaceutiques ou encore des produits alimentaires de différentes viscosités pouvant aller de produits liquides à des produits ayant la consistance de crèmes.The present invention relates to a metering pump intended to be mounted in particular by screwing, latching, welding, etc. .... on various rigid or flexible containers such as bottles, tubes or pots, in particular containers containing cosmetic products or pharmaceutical products or even food products of different viscosities ranging from liquid products to products having the consistency of creams.

Il existe sur le marché depuis déjà de nombreuses années différents types de pompes doseuses qui mettent toutes en oeuvre un certain nombre de pièces telles que ressorts, billes, clapets, bouchons et autres. Outre que la fabrication et l'assemblage de ces pièces, sont onéreux en main d'oeuvre, ces pompes doseuses présentent en règle générale l'inconvénient d'une étanchéité insuffisante ainsi que d'une reprise d'air extérieur vers l'intérieur pendant leur ouverture et leur fermeture, ce qui nécessite d'incorporer des conservateurs au contenu afin d'éviter son oxydation.There are on the market since many years many different types of metering pumps that all implement a number of parts such as springs, balls, valves, plugs and others. In addition to the fact that manufacturing and assembly of these parts are expensive in terms of labor, these metering pumps generally have the disadvantage of insufficient sealing as well as a return of outside air inwards during their opening and closing, which requires incorporating preservatives in the contents to prevent oxidation.

Pour remédier à ces inconvénients, on a déjà proposé, notamment conformément au document EP-0 726 097 des pompes doseuses comprenant un corps de pompe en un matériau rigide ou semi-rigide adaptable sur un récipient et renfermant une chambre dose ainsi que des moyens de commande déformables élastiquement, actionnables de l'extérieur et susceptibles d'être successivement déplacés entre une position de distribution et une position de repos de façon à permettre l'expulsion d'une dose de produit de la chambre dose vers l'extérieur par une ouverture d'expulsion puis le transfert d'une nouvelle dose de produit du récipient vers la chambre dose et ainsi de suite.To remedy these drawbacks, it has already been proposed, in particular in accordance with the document EP-0 726 097 metering pumps comprising a pump body made of a rigid or semi-rigid material adaptable to a container and enclosing a dose chamber and elastically deformable control means operable from the outside and capable of being successively moved between a position of distribution and a rest position so as to allow the expulsion of a dose of product from the dose chamber to the outside through an expulsion opening and the transfer of a new dose of product from the container to the dose chamber and and so on.

Le corps de pompe de telles pompes doseuses est en règle générale délimité à sa partie interne par une paroi latérale annulaire et par une face frontale comportant une ouverture de remplissage qui communique avec l'intérieur du récipient.The pump body of such metering pumps is generally delimited at its inner part by an annular side wall and by a front face having a filling opening which communicates with the interior of the container.

Conformément à cet art antérieur, les moyens de commande sont automatiquement rappelés de la position de distribution vers la position de repos en l'absence de toute contrainte extérieure s'exerçant sur eux, ce en créant une dépression permettant l'aspiration d'une dose de produit vers la chambre dose.According to this prior art, the control means are automatically recalled from the dispensing position to the rest position in the absence of any external stress exerted on them, creating a vacuum allowing the aspiration of a dose from product to the dose chamber.

Le document FR-A-1,441,127 divulgue pour sa part un type de pompe doseuse faisant appel à un gaz sous faible pression. Les caractéristiques du préambule de la revendication 1 sont connues de ce document FR-A-1,441,127 .The document FR-A-1441127 discloses for its part a type of metering pump using a gas under low pressure. The features of the preamble of claim 1 are known from this document FR-A-1441127 .

Malgré leurs qualités propres indéniables, de telles pompes doseuses présentent l'inconvénient d'être souvent relativement onéreuses et parfois peu efficaces lors des premiers amorçages.Despite their undeniable intrinsic qualities, such dosing pumps have the disadvantage of being often relatively expensive and sometimes not very effective during the first priming.

De plus, le dosage de produits de haute viscosité n'est pas toujours aisé et les moyens de commande déformables élastiquement ont parfois des difficultés à reprendre leur forme initiale lors de leur transfert de la position de distribution à la position de repos, ce qui peut occasionner une certaine reprise d'air extérieur.In addition, the dosing of high viscosity products is not always easy and the elastically deformable control means sometimes have difficulty returning to their original shape when they are transferred from the dispensing position to the rest position, which can cause some recovery of outside air.

La présente invention a pour objet de remédier à ces inconvénients en proposant une pompe doseuse simple, efficace et fiable et permettant parallèlement de doser des produits non seulement liquides, mais pouvant également présenter une viscosité relativement élevée, ce en créant des doses de volume important.The object of the present invention is to remedy these drawbacks by proposing a simple, efficient and reliable metering pump which, at the same time, makes it possible to dose products which are not only liquid but which can also have a relatively high viscosity, while creating high volume doses.

A cet effet, l'invention concerne une pompe doseuse du type susmentionné caractérisée en ce que les moyens de commande sont constitués par un poussoir en un matériau rigide ou semi-rigide, par un piston en un matériau thermoplastique souple susceptible de glisser par rapport au poussoir et par rapport au corps de pompe en étant en contact permanent avec ces deux éléments ainsi que par une valve annulaire en un matériau élastiquement déformable constamment en appui contre le poussoir.For this purpose, the invention relates to a metering pump of the aforementioned type, characterized in that the control means are constituted by a pusher made of a rigid or semi-rigid material, by a piston made of a flexible thermoplastic material capable of sliding relative to the pusher and with respect to the pump body being in permanent contact with these two elements as well as by an annular valve made of an elastically deformable material constantly bearing against the pusher.

Selon une caractéristique essentielle de l'invention, le déplacement des moyens de commande entre la position de repos et la position de distribution s'effectue en deux étapes, à savoir d'une part une première étape dans laquelle le poussoir glisse par rapport au piston dans le corps de pompe et la chambre dose est isolée de l'ouverture d'expulsion, et d'autre part une seconde étape dans laquelle le poussoir et le piston glissent solidairement dans le corps de pompe et une ouverture de distribution permettant la mise en communication de la chambre dose et de l'ouverture d'expulsion est dégagée.According to an essential characteristic of the invention, the displacement of the control means between the rest position and the dispensing position takes place in two steps, namely on the one hand a first step in which the pusher slides relative to the piston in the pump body and the dose chamber is isolated from the expulsion opening, and secondly a second step in which the plunger and the piston slide integrally into the pump body and a dispensing opening allowing the setting communication of the dose chamber and expulsion opening is cleared.

Le dégagement différé de l'ouverture de distribution correspond à une caractéristique très avantageuse de l'invention vu qu'il facilite dans une large mesure l'amorçage de la pompe doseuse lors des premières utilisations.The delayed release of the dispensing opening corresponds to a very advantageous characteristic of the invention since it facilitates to a large extent the priming of the metering pump during the first uses.

Selon une autre caractéristique de l'invention, le poussoir comprend une face d'appui ainsi qu'une tige médiane qui est constamment en appui contre la valve annulaire et est entourée par un canal d'expulsion annulaire délimité par une paroi tubulaire et qui communique avec l'ouverture d'expulsion.According to another characteristic of the invention, the pusher comprises a bearing face and a median rod which is constantly resting against the annular valve and is surrounded by a channel annular expulsion delimited by a tubular wall and which communicates with the expulsion opening.

Le piston comporte quant à lui un embout tubulaire monté autour de la tige médiane du poussoir au niveau de l'extrémité libre de celle-ci et se prolongeant à sa périphérie externe par une ailette périphérique de façon à définir une surface formant butée pour l'extrémité libre de la paroi tubulaire du poussoir lors de la seconde étape du déplacement de celui-ci entre la position de repos et la position de distribution.The piston comprises a tubular tip mounted around the central rod of the pusher at the free end thereof and extending at its outer periphery by a peripheral fin so as to define a stop surface for the free end of the tubular wall of the pusher during the second step of moving it between the rest position and the dispensing position.

Ce piston est en contact permanent d'une part avec le poussoir par une première lèvre d'étanchéité constamment en appui contre la face externe du canal d'expulsion annulaire, et d'autre part avec le corps de pompe par une seconde lèvre d'étanchéité constamment en appui contre la paroi latérale annulaire de celui-ci.This piston is in permanent contact on the one hand with the pusher by a first sealing lip constantly bearing against the outer face of the annular expulsion channel, and on the other hand with the pump body by a second lip of constantly sealing against the annular side wall thereof.

Selon une autre caractéristique de l'invention, la valve annulaire est disposée entre la face frontale du corps de pompe et l'extrémité libre de la tige médiane du poussoir.According to another characteristic of the invention, the annular valve is disposed between the front face of the pump body and the free end of the central rod of the pusher.

Cette valve annulaire comporte une membrane de fermeture extensible essentiellement circulaire qui est constamment en appui contre l'extrémité libre de la tige médiane du poussoir par sa partie médiane et est susceptible de venir en appui contre la paroi latérale annulaire du corps de pompe par sa périphérie de façon à obturer l'ouverture de remplissage.This annular valve comprises a substantially circular expandable closure membrane which is constantly resting against the free end of the central rod of the pusher by its median portion and is capable of bearing against the annular side wall of the pump body by its periphery in order to close the filling opening.

La membrane de fermeture coopère avec la paroi latérale annulaire du corps de pompe et avec une paroi de fermeture du piston, contiguë à la seconde lèvre d'étanchéité pour définir la chambre dose.The closure membrane cooperates with the annular side wall of the pump body and with a closing wall of the piston, contiguous with the second sealing lip to define the dose chamber.

Selon l'invention, l'embout tubulaire du piston vient en appui contre la membrane de fermeture de la valve annulaire en position de repos et pendant la première étape du déplacement entre la position de repos et la position de distribution pour fermer la chambre dose et s'en écarte pendant la seconde étape de ce déplacement pour dégager l'ouverture de distribution et permettre le passage du produit contenu dans la chambre dose entre cet embout et la tige médiane du poussoir, et son évacuation par le canal d'expulsion et par l'ouverture d'expulsion.According to the invention, the tubular tip of the piston abuts against the closing diaphragm of the annular valve in the rest position and during the first step of displacement between the rest position and the dispensing position to close the dose chamber and away from it during the second stage of this movement to clear the dispensing opening and allow the passage of the product contained in the dose chamber between this tip and the central rod of the pusher, and its evacuation through the expulsion channel and by the opening of expulsion.

Selon une autre caractéristique de l'invention, la tige médiane du poussoir peut être équipée au niveau de son extrémité libre d'au moins une cannelure longitudinale et de préférence d'une série de cannelures longitudinales uniformément réparties sur sa périphérie.According to another characteristic of the invention, the median rod of the pusher may be equipped at its free end with at least one longitudinal groove and preferably with a series of longitudinal grooves uniformly distributed over its periphery.

Ces cannelures ont pour fonction de permettre le passage du produit contenu dans la chambre dose entre l'embout tubulaire du piston et la tige médiane du poussoir pour permettre son expulsion vers l'extérieur.These grooves have the function of allowing the passage of the product contained in the dose chamber between the tubular tip of the piston and the central rod of the pusher to allow its expulsion outwards.

Selon une caractéristique particulièrement avantageuse de l'invention, la valve annulaire est constituée par une bague cylindrique dont l'une des faces frontales est fermée par la membrane de fermeture.According to a particularly advantageous characteristic of the invention, the annular valve is constituted by a cylindrical ring of which one of the end faces is closed by the closure membrane.

Selon l'invention, cette membrane fait saillie sur la périphérie de la bague cylindrique afin de définir une collerette susceptible de venir en appui contre la paroi latérale annulaire du corps de pompe pour isoler la chambre dose de la partie interne du récipient lors du déplacement de la pompe doseuse de la position de repos à la position de distribution.According to the invention, this membrane projects on the periphery of the cylindrical ring in order to define a flange capable of bearing against the annular side wall of the pump body in order to isolate the dose chamber from the internal part of the container during the displacement of the dosing pump from the rest position to the dispensing position.

Lors du déplacement de la pompe doseuse vers la position de repos, cette collerette s'écarte de la paroi latérale annulaire du corps de pompe de façon à permettre le remplissage de la chambre dose.When moving the metering pump to the rest position, this collar deviates from the annular side wall of the pump body so as to allow the filling of the dose chamber.

Par suite, lors du déplacement de la pompe doseuse de la position de repos à la position de distribution, la déformation élastique de la membrane de fermeture de la valve annulaire crée un joint permettant d'isoler hermétiquement la chambre dose de la partie interne du récipient tout en créant un effet de ressort permettant le rappel automatique du poussoir en position de repos.As a result, during the displacement of the metering pump from the rest position to the dispensing position, the elastic deformation of the closing membrane of the annular valve creates a seal for hermetically isolating the dose chamber from the inner part of the container. while creating a spring effect allowing the automatic return of the pusher in the rest position.

Cette isolation de la chambre dose permet d'évacuer vers l'extérieur le produit contenu dans celle-ci sous l'action de sa compression consécutive au rapprochement de la paroi de fermeture du piston et de la membrane de fermeture de la valve annulaire qui viennent en contact en fin de distribution.This insulation of the dose chamber makes it possible to evacuate the product contained therein under the action of its compression as a result of bringing the closing wall of the piston and the closing diaphragm of the annular valve which come in contact at the end of distribution.

Selon une autre caractéristique de l'invention, la face frontale du corps de pompe comporte des organes de réception de la valve annulaire.According to another characteristic of the invention, the front face of the pump body comprises receiving members of the annular valve.

Ces organes de réception peuvent avantageusement être constitués par un manchon tubulaire entourant l'ouverture de remplissage et muni de fentes radiales en forme de coins permettant le passage du produit contenu dans le récipient vers la chambre dose lorsque la pompe doseuse est rappelée de la position de distribution vers la position de repos.These receiving members may advantageously be constituted by a tubular sleeve surrounding the filling opening and provided with radial slots shaped wedges allowing the passage of the product contained in the container to the dose chamber when the dosing pump is recalled from the position of distribution to the rest position.

Selon l'invention, la face interne, conique de ce manchon tubulaire fait office de siège pour la membrane de fermeture tandis que la face externe, cylindrique de celui-ci coopère avec le corps de pompe pour définir un logement de réception de la bague cylindrique de la valve annulaire.According to the invention, the internal, conical face of this tubular sleeve acts as a seat for the closure membrane while the external face, cylindrical thereof cooperates with the pump body to define a receiving housing of the cylindrical ring of the annular valve.

Selon une autre caractéristique de l'invention, la paroi latérale du corps de pompe est équipée d'un épaulement incliné obliquement formant siège pour la collerette de la valve annulaire et se prolongeant au droit du logement de réception de la bague cylindrique par une série de fentes définissant des passages permettant le transfert du produit contenu dans le récipient vers la chambre dose lors du rappel de la pompe doseuse de la position de distribution vers la position de repos.According to another characteristic of the invention, the side wall of the pump body is equipped with an obliquely inclined shoulder forming a seat for the collar of the annular valve and extending to the right of the receiving housing of the cylindrical ring by a series of slots defining passages allowing the transfer of the product contained in the container to the dose chamber when the dosing pump is returned from the dispensing position to the rest position.

Les caractéristiques de la pompe doseuse qui fait l'objet de l'invention seront décrites plus en détail en se référant aux dessins annexés dans lesquels :

  • la figure 1 est une vue en coupe de la pompe doseuse représentée en position de repos sur la partie gauche et en position de distribution sur la partie droite,
  • la figure 2 est une vue en coupe de la valve annulaire en position de repos,
  • la figure 3 est une vue en coupe partielle de l'embout tubulaire du piston monté autour de la tige médiane du poussoir,
  • la figure 4 est une vue en perspective schématique des organes de réception de la valve annulaire,
  • les figures 5a, 5b et 5c sont des coupes schématiques représentant la pompe doseuse montée sur différents récipients.
The characteristics of the metering pump which is the subject of the invention will be described in more detail with reference to the appended drawings in which:
  • FIG. 1 is a sectional view of the metering pump shown in the rest position on the left side and in the dispensing position on the right side,
  • FIG. 2 is a sectional view of the annular valve in the rest position,
  • FIG. 3 is a partial sectional view of the tubular tip of the piston mounted around the central rod of the pusher;
  • FIG. 4 is a schematic perspective view of the receiving members of the annular valve,
  • Figures 5a, 5b and 5c are schematic sections showing the metering pump mounted on different containers.

Selon la figure 1, la pompe doseuse est essentiellement constituée par un corps de pompe 1 représenté sur les figures 5a, 5b et 5c qui est monté sur un récipient R.According to Figure 1, the metering pump essentially consists of a pump body 1 shown in Figures 5a, 5b and 5c which is mounted on a container R.

Ce corps de pompe 1 comporte à sa partie interne une paroi latérale annulaire 100 de forme essentiellement cylindrique et une face frontale 101 percée d'une ouverture de remplissage 25 qui communique avec l'intérieur du récipient R.This pump body 1 comprises at its inner part an annular lateral wall 100 of substantially cylindrical shape and a front face 101 pierced with a filling opening 25 which communicates with the interior of the container R.

Le corps de pompe 1 renferme un poussoir 2, un piston 3 et une valve annulaire 4 élastiquement déformable.The pump body 1 encloses a pusher 2, a piston 3 and an annular valve 4 elastically deformable.

Le poussoir 2 comprend une face d'appui 5 sur laquelle l'utilisateur peut exercer une pression selon la flèche F ainsi qu'une tige médiane 6 dont la périphérie est équipée de cannelures longitudinales 7 au niveau de son extrémité libre 8.The pusher 2 comprises a bearing surface 5 on which the user can exert a pressure along the arrow F and a median rod 6 whose periphery is equipped with longitudinal grooves 7 at its free end 8.

Ces cannelures 7 sont représentées plus en détail sur la figure 3.These grooves 7 are shown in more detail in FIG.

Selon la figure 1, la tige médiane 6 du poussoir 2 est entourée par un canal d'expulsion 9 qui est délimité par une paroi tubulaire 10.According to FIG. 1, the median rod 6 of the pusher 2 is surrounded by an expulsion channel 9 which is delimited by a tubular wall 10.

Le canal d'expulsion 9 communique avec une ouverture 11 permettant l'expulsion du produit contenu dans le récipient R d'une façon qui sera décrite plus en détail dans la suite de cet exposé.The expulsion channel 9 communicates with an opening 11 allowing the expulsion of the product contained in the container R in a manner to be described in more detail later in this discussion.

Le piston 3 qui est inséré entre le corps de pompe 1 et le poussoir 2 comporte quant à lui un embout tubulaire 12 qui est monté autour de la tige médiane 6 du poussoir 2 à proximité de l'extrémité libre 8 de celle-ci et se prolonge à sa périphérie externe par une ailette périphérique 13 de façon à définir une surface formant butée 14 pour l'extrémité libre 80 de la paroi tubulaire 10 du poussoir 2.The piston 3 which is inserted between the pump body 1 and the pusher 2 comprises meanwhile a tubular nozzle 12 which is mounted around the central rod 6 of the pusher 2 near the free end 8 thereof and is extends at its outer periphery by a peripheral fin 13 so as to define an abutment surface 14 for the free end 80 of the tubular wall 10 of the pusher 2.

Selon la figure 1 le poussoir 2 peut coulisser à la partie interne du corps de pompe 1 entre une position de repos représentée sur la partie gauche de la figure et une position de distribution représentée sur la partie droite de celle-ci.According to Figure 1 the pusher 2 can slide to the inner portion of the pump body 1 between a rest position shown on the left side of the figure and a dispensing position shown on the right side thereof.

Le piston 3 peut lui aussi coulisser le long du corps de pompe 1 et également le long du poussoir 2 et est en contact permanent avec ces deux éléments 1 et 2 d'une part par une première lèvre d'étanchéité annulaire 15 constamment en appui contre la face externe du canal d'expulsion 9 du poussoir 2 et d'autre part par une seconde lèvre d'étanchéité 16 constamment en appui contre la paroi latérale annulaire 100 du corps de pompe 1.The piston 3 can also slide along the pump body 1 and also along the pusher 2 and is in permanent contact with these two elements 1 and 2 on the one hand by a first annular sealing lip 15 constantly bearing against the outer face of the expulsion channel 9 of the pusher 2 and secondly by a second sealing lip 16 constantly bearing against the annular side wall 100 of the pump body 1.

Les deux lèvres d'étanchéité annulaire 15 et 16 sont représentées sur la figure 3.The two annular sealing lips 15 and 16 are shown in FIG.

Selon les figures 1 et 2, la valve annulaire 4 est insérée entre le poussoir 2 et le piston 3 d'une part et la face frontale 101 du corps de pompe 1 d'autre part et est constituée par une bague cylindrique 18 dont l'une des faces frontales est fermée par une membrane de fermeture 20 de forme circulaire.According to Figures 1 and 2, the annular valve 4 is inserted between the pusher 2 and the piston 3 on the one hand and the end face 101 of the pump body 1 on the other hand and is constituted by a cylindrical ring 18 of which one of the end faces is closed by a closure membrane 20 of circular shape.

Cette membrane 20 fait saillie sur la périphérie de la bague cylindrique 18 pour définir une collerette 21 susceptible de venir en appui contre la paroi latérale annulaire 100 du corps de pompe 1.This membrane 20 projects on the periphery of the cylindrical ring 18 to define a flange 21 capable of bearing against the annular side wall 100 of the pump body 1.

Selon la figure 1, la partie médiane de la membrane de fermeture 20 de la valve annulaire 4 est constamment en appui contre l'extrémité 8 de la tige médiane 6 du poussoir 2, et peut être déformée élastiquement par celle-ci comme représenté sur la partie droite de cette figure.According to FIG. 1, the median part of the closure membrane 20 of the annular valve 4 is constantly resting against the end 8 of the median rod 6 of the pusher 2, and can be deformed elastically by it as shown on the right side of this figure.

Selon la figure 1, la paroi latérale 100 du corps de pompe 1, la membrane de fermeture 20 de la valve 4 ainsi qu'une paroi de fermeture 33 du piston 3 située entre la seconde lèvre d'étanchéité 16 et l'extrémité 17 de l'embout tubulaire 12 coopèrent pour délimiter une chambre dose 32 dont le rôle sera décrit plus en détails dans la suite de cet exposé.According to FIG. 1, the side wall 100 of the pump body 1, the closing membrane 20 of the valve 4 and a closing wall 33 of the piston 3 situated between the second sealing lip 16 and the end 17 of the tubular endpiece 12 cooperate to delimit a dose chamber 32 whose role will be described in more detail later in this presentation.

Cette chambre dose est en permanence hermétiquement fermée par la seconde lèvre d'étanchéité 16 et peut être isolée de l'extérieur et de la partie interne du récipient R d'une part par l'extrémité libre 17 de l'embout tubulaire 12 du piston 3 venant en appui contre la membrane de fermeture 20 de la valve 4 et d'autre part par la collerette 21 venant en appui contre la paroi latérale 100 du corps de pompe 1.This dose chamber is permanently hermetically closed by the second sealing lip 16 and can be isolated from the outside and the inner part of the container R on the one hand by the free end 17 of the tubular end piece 12 of the piston 3 bearing against the closing membrane 20 of the valve 4 and secondly by the collar 21 bearing against the side wall 100 of the pump body 1.

Selon la figure 1, la face frontale 101 du corps de pompe 1 est équipée d'organes de réception 23 de la valve annulaire 4.According to FIG. 1, the end face 101 of the pump body 1 is equipped with receiving members 23 of the annular valve 4.

Selon les figures 1 et 4, ces organes de réception 23 comportent un manchon tubulaire 24 entourant l'ouverture de remplissage 25 permettant de faire communiquer le corps de pompe 1 avec la partie interne du récipient R.According to Figures 1 and 4, these receiving members 23 comprise a tubular sleeve 24 surrounding the filling opening 25 for communicating the pump body 1 with the inner part of the container R.

Ce manchon tubulaire 24 comporte une face externe 26 de forme cylindrique et une face interne 27 de forme conique inclinée en direction de l'ouverture de remplissage 25 et est équipé de fentes radiales 28 en forme de coins.This tubular sleeve 24 has an outer face 26 of cylindrical shape and an inner face 27 of conical shape inclined towards the filling opening 25 and is equipped with radial slots 28 in the form of corners.

La face interne conique 27 du manchon tubulaire 24 fait office de siège pour la membrane de fermeture 20 de la valve annulaire 4.The conical inner face 27 of the tubular sleeve 24 acts as a seat for the closing membrane 20 of the annular valve 4.

La face externe cylindrique 26 du manchon tubulaire 24 coopère quant à elle avec le corps de pompe 1 de façon à définir un logement de réception 29 de la bague cylindrique 18 de la valve annulaire 4.The cylindrical outer surface 26 of the tubular sleeve 24 cooperates with the pump body 1 so as to define a receiving housing 29 of the cylindrical ring 18 of the annular valve 4.

Comme représenté sur les figures 1 et 4, la paroi latérale 100 du corps de pompe 1 est équipée d'un épaulement 30 incliné obliquement formant siège pour la collerette 21 de la valve annulaire 4.As shown in FIGS. 1 and 4, the side wall 100 of the pump body 1 is equipped with an obliquely inclined shoulder forming a seat for the collar 21 of the annular valve 4.

Cet épaulement 30 se prolonge au droit du logement de réception 29 vers la face frontale 101 du corps de pompe 1 par une série de fentes longitudinales 31 définissant des passages latéraux pour le produit renfermé dans le récipient R vers la chambre dose 32.This shoulder 30 extends to the right of the receiving housing 29 towards the end face 101 of the pump body 1 by a series of longitudinal slots 31 defining lateral passages for the product contained in the container R towards the dose chamber 32.

Selon la figure 1, les fentes longitudinales 31 se prolongent par des fentes transversales 34 prévues sur la face frontale 22 du corps de pompe 1 dont le rôle sera précisé dans la suite de cet exposé.According to Figure 1, the longitudinal slots 31 are extended by transverse slots 34 provided on the front face 22 of the pump body 1 whose role will be specified in the following of this presentation.

Selon les figures 1 et 5a, le récipient R est réalisé en verre, notamment par soufflage ou en une matière thermoplastique par extrusion, soufflage, injection-soufflage...According to FIGS. 1 and 5a, the container R is made of glass, in particular by blowing or a thermoplastic material by extrusion, blowing, injection-blowing ...

Selon ces figures, le corps de pompe 1 est équipé d'un tube plongeur 35 se prolongeant jusqu'au fond du récipient R de manière à permettre l'aspiration du produit qui y est contenu.According to these figures, the pump body 1 is equipped with a dip tube 35 extending to the bottom of the container R so as to allow the suction of the product contained therein.

Selon cette configuration, le corps 1 est en outre équipé d'une ouverture 36 permettant le passage d'air compensateur provenant de l'extérieur vers l'intérieur du récipient R.According to this configuration, the body 1 is further equipped with an opening 36 allowing the passage of compensating air from the outside to the inside of the container R.

Selon la figure 5b, le récipient R1 est associé à un piston 37 monté au fond de celui-ci et susceptible de se déplacer vers le haut comme indiqué par la flèche en glissant à l'intérieur du récipient R1 proportionnellement à la dose de produit évacuée vers l'extérieur.According to FIG. 5b, the container R 1 is associated with a piston 37 mounted at the bottom thereof and able to move upwards as indicated by the arrow by sliding inside the container R 1 in proportion to the dose of product discharged to the outside.

Selon la figure 5c, le récipient R2 est équipé à sa partie interne d'une poche rétractable 38 susceptible de se rétracter proportionnellement à la dose de produit évacuée vers l'extérieur comme indiqué par les flèches représentées sur cette figure.According to Figure 5c, the container R 2 is equipped at its inner portion with a retractable pocket 38 retractable proportionally to the dose of product discharged to the outside as indicated by the arrows shown in this figure.

La poche rétractable 38 peut être fixée soit au récipient R2 soit au corps de pompe 1.The retractable pocket 38 can be attached to either the container R 2 or to the pump body 1.

Selon les figures 5b et 5c, les récipients R1 et R2 sont pourvus d'une ouverture 39 en contact avec l'atmosphère à leur partie inférieure, mais, il n'est pas nécessaire de prévoir une prise d'air extérieure similaire à la prise d'air 36 (figure 5a) sur le corps de pompe 1.According to FIGS. 5b and 5c, the containers R 1 and R 2 are provided with an opening 39 in contact with the atmosphere at their lower part, but it is not necessary to provide an outside air intake similar to the air intake 36 (Figure 5a) on the pump body 1.

Selon la figure 1, le fonctionnement de la pompe doseuse est le suivant :According to Figure 1, the operation of the metering pump is as follows:

Dans la position de repos représentée sur la partie gauche de la figure 1, le poussoir 2 est décalé au maximum vers le haut et l'extrémité inférieure 80 de la paroi tubulaire 10 n'est pas en appui contre la surface formant butée 14 du piston 3 mais située à une certaine distance de celle-ci.In the rest position shown on the left-hand part of FIG. 1, the pusher 2 is offset at the maximum upwards and the lower end 80 of the tubular wall 10 does not rest against the abutment surface 14 of the piston. 3 but located some distance from it.

Dans cette position, la chambre dose 32 contient une dose de produit et est hermétiquement fermée par la seconde lèvre d'étanchéité 16, par la collerette 21 de la valve annulaire 4 et par l'extrémité 17 de l'embout tubulaire 12 du piston 3 qui est en appui contre la partie médiane de la membrane de fermeture 20 de la valve annulaire 4.In this position, the dose chamber 32 contains a dose of product and is hermetically closed by the second sealing lip 16, by the collar 21 of the annular valve 4 and by the end 17 of the tubular nozzle 12 of the piston 3 which bears against the middle part of the closing membrane 20 of the annular valve 4.

Si à partir de cette position de repos, l'utilisateur exerce une pression F sur la face d'appui 5 du poussoir 2, comme représenté sur la partie droite de la figure 1, ce poussoir glisse vers le bas dans le corps de pompe 1 et l'extrémité inférieure 8 de la tige médiane 6 déforme élastiquement la membrane de fermeture 20 de la valve annulaire 4.If from this rest position, the user exerts a pressure F on the bearing surface 5 of the pusher 2, as shown in the right part of FIG. 1, this pusher slides downwards in the body of pump 1 and the lower end 8 of the middle rod 6 elastically deforms the closing membrane 20 of the annular valve 4.

A partir de la position initiale dans laquelle l'extrémité libre 17 de l'embout tubulaire 12 du piston 3 est maintenue en appui contre la membrane de fermeture 20 de la valve 4 de façon à isoler la chambre dose 32 de l'extérieur, ce déplacement s'effectue en deux étapes : dans une première étape, le poussoir 2 glisse le long du piston 3, ce jusqu'à ce que l'extrémité inférieure 80 de la paroi tubulaire 10 vienne en appui contre la surface formant butée 14 et l'effet de descente de la tige médiane 6 pousse la membrane de fermeture 20 de la valve annulaire 4 alors que le piston 3 est encore sans mouvement de sorte que cette membrane de fermeture 20 s'éloigne de l'extrémité libre 17 de l'embout tubulaire 12 pour créer une ouverture de distribution 42.From the initial position in which the free end 17 of the tubular end piece 12 of the piston 3 is held in abutment against the closing membrane 20 of the valve 4 so as to isolate the dose chamber 32 from the outside, this displacement occurs in two stages: in a first step, the pusher 2 slides along the piston 3, until the lower end 80 of the tubular wall 10 bears against the abutment surface 14 and the descent effect of the middle rod 6 pushes the closing membrane 20 of the annular valve 4 while the piston 3 is still without movement so that this closing membrane 20 moves away from the free end 17 of the nozzle tubular 12 to create a dispensing opening 42.

Dans la seconde étape, c'est-à-dire lorsque l'extrémité de la paroi tubulaire 10 du poussoir 2 est en appui contre la surface formant butée 14, l'ouverture de distribution 42 est dégagée et le produit présent dans la chambre dose 32 peut être évacué vers l'ouverture d'expulsion 11 comme schématisé par les flèches a représentées en traits mixtes en passant tout d'abord entre l'embout tubulaire 12 du piston 3 et la tige médiane 6 du poussoir 2, en pénétrant dans les cannelures longitudinales 7 de cette tige 6 puis dans le canal d'expulsion annulaire 9.In the second step, that is to say when the end of the tubular wall 10 of the pusher 2 is in abutment against the abutment surface 14, the dispensing opening 42 is disengaged and the product present in the chamber dose 32 can be evacuated towards the expulsion opening 11 as shown schematically by the arrows a represented in phantom first passing between the tubular end piece 12 of the piston 3 and the central rod 6 of the pusher 2, penetrating the longitudinal grooves 7 of this rod 6 and then in the annular expulsion channel 9.

Ce glissement solidaire du poussoir 2 et du piston 3 dans le corps de pompe 1 se poursuit jusqu'à ce qu'une bride périphérique 40 du poussoir 2 vienne en appui contre une bride périphérique antagoniste 41 du corps de pompe 1.This sliding of the pusher 2 and the piston 3 into the pump body 1 is continued until a peripheral flange 40 of the pusher 2 bears against an opposing peripheral flange 41 of the pump body 1.

Dans cette position qui correspond à la position de distribution proprement dite représentée sur la partie droite de la figure 1 la paroi de fermeture 33 du piston 3 est en appui contre la membrane de fermeture 20 de la valve annulaire 4 et la chambre dose 32 a ainsi été vidée dans sa totalité.In this position, which corresponds to the actual dispensing position shown in the right part of FIG. 1, the closure wall 33 of the piston 3 bears against the closing membrane 20 of the annular valve 4 and the dose chamber 32 thus been emptied in its entirety.

Au cours de la vidange de la chambre dose 32, l'étanchéité de celle-ci est garantie d'une part par la seconde lèvre d'étanchéité 16 du piston 3 et d'autre part par la collerette 21 de la valve annulaire 4 qui est constamment en appui contre la paroi latérale 100 du corps de pompe 1.During the emptying of the dose chamber 32, its sealing is guaranteed on the one hand by the second sealing lip 16 of the piston 3 and on the other hand by the collar 21 of the annular valve 4 which is constantly resting against the side wall 100 of the pump body 1.

A partir de la position de distribution représentée sur la partie droite de la figure 1, le poussoir 2 est automatiquement rappelé dans la position de repos représentée sur la partie gauche de la figure 1 suite à l'élasticité de la membrane de fermeture 20 de la valve annulaire 4.From the dispensing position shown on the right-hand part of FIG. 1, the pusher 2 is automatically recalled in the rest position shown on the left-hand part of FIG. 1 following the elasticity of the closure membrane 20 of the annular valve 4.

Au cours de ce déplacement l'ouverture de distribution 42 située entre l'embout tubulaire 12 du piston 3 et la membrane de fermeture 20 se ferme et la paroi de fermeture 33 du piston 3 se sépare de la membrane de fermeture 20 en créant une dépression.During this movement, the dispensing opening 42 situated between the tubular end piece 12 of the piston 3 and the closing membrane 20 closes and the closure wall 33 of the piston 3 separates from the closure membrane 20 by creating a depression .

Cette dépression entraîne le soulèvement de la collerette 21 de l'épaulement 30 de la paroi latérale 100 du corps de pompe 1 et l'aspiration vers la chambre dose 32 du produit contenu dans le récipient R par les fentes radiales en forme de coins 28 du manchon annulaire 24 et par les fentes 31 et 34 comme schématisé par les flèches b représentées sen traits mixtes.This depression causes the flange 21 of the shoulder 30 of the side wall 100 of the pump body 1 to rise and the suction towards the dose chamber 32 of the product contained in the container R by the radial wedge-shaped slits 28 of the annular sleeve 24 and by the slots 31 and 34 as shown schematically by the arrows b shown as mixed lines.

La chambre dose 32 est ainsi automatiquement remplie et l'utilisateur peut à nouveau exercer une traction F sur la face d'appui 5 du poussoir 2 pour vidanger cette chambre 32 et libérer une dose de produit et ainsi de suite.The dose chamber 32 is thus automatically filled and the user can again exert a traction F on the support surface 5 of the pusher 2 to empty the chamber 32 and release a dose of product and so on.

Selon la figure 1, au cours du déplacement du poussoir 2 du piston 3 et de la valve annulaire 4 de la position de distribution vers la position de repos de l'air extérieur est soutiré vers l'intérieur du récipient R comme schématisé par les flèches c représentées en traits mixtes.According to Figure 1, during the displacement of the plunger 2 of the piston 3 and the annular valve 4 from the dispensing position to the rest position of the outside air is drawn towards the inside of the container R as shown schematically by the arrows c represented in phantom.

Claims (8)

  1. Metering pump designed to be fitted on various receptacles, in particular receptacles containing liquid cosmetic or pharmaceutical products of a creamy consistency, and comprising a pump body (1) made from a rigid or semi-rigid material which can be adapted to fit on the receptacle R, bounded by an annular side wall (100) at its internal part and by a front-end face (101) incorporating a filling orifice (25) which communicates with the interior of the receptacle, and enclosing a dose chamber (32) as well as elastically deformable control means which can be activated from the outside and are designed to be displaced successively between a dispensing position and a non-operating position to enable a dose of product to be ejected from the dose chamber (32) to the outside via an ejection orifice (11) and then a new dose of product to be transferred from the receptacle to the dose chamber (32) and so on, which control means are automatically returned from the dispensing position to the non-operating position in the absence of any external constraint acting on them, and are so by creating a vacuum enabling a dose of product to be sucked into the dose chamber (32),
    said metering pump being characterised in that
    the control means comprise a pushing means (2) made from a rigid or semi-rigid material, a plunger (3) made from a flexible thermoplastic material which is able to slide relative to the pushing means (2) and relative to the pump body (1) and which is in permanent contact with these two elements, as well as an annular valve (4) made from an elastically deformable material comprising a cylindrical collar (18), one of the front-end faces of which is closed by an essentially circular, stretchable closing membrane (20) which constantly bears against the pushing means (2), this membrane (20) standing proud of the periphery of the cylindrical collar (18) in order to define a flange (21) which can be moved to bear against the side wall (100) of the pump body (1) so as to close off the filling orifice (25), and the control means is moved between the non-operating position and the dispensing position in two steps, namely a first step on the one hand, during which the pushing means (2) slides in the pump body relative to the plunger (3) and the dose chamber (32) is isolated from the ejection orifice (11), and a second step on the other hand, during which the pushing means (2) and the plunger (3) slide in unison in the pump body (1), and a dispensing orifice (42) enabling the dose chamber (32) to communicate with the ejection orifice (11) is released.
  2. Metering pump as claimed in claim 1,
    characterised in that
    the pushing mean (2) comprises a support face (5) as well as a median rod (6) constantly supported against the annular valve (4) and surrounded by an annular ejection passage (9) bounded by a tubular wall (10) and which communicates with the ejection orifice (11).
  3. Metering pump as claimed in claim 2,
    characterised in that
    the plunger (3) has a tubular end (12) mounted around the median rod (6) of the pushing means (2) on a level with the free end (8) thereof and extended at its outer periphery by means of a peripheral fin (13) so as to define a surface forming an abutment (14) for the free end (80) of the tubular wall (10) of the pushing means (2), this plunger (3) being in permanent contact with the pushing means (2) by means of a first sealing lip (15) constantly bearing against the external face of the annular ejection passage (9) on the one hand and with the pump body (1) by means of a second sealing lip (16) constantly bearing against the annular side wall (100) thereof on the other hand.
  4. Metering pump as claimed in claim 3,
    characterised in that
    the annular valve (4) is disposed between the front-end face (101) of the pump body (1) and the free end (8) of the median rod (6) of the pushing means (2), against which it is constantly supported by means of the median part of the closing membrane (20) and co-operates with the side wall (100) of the pump body (1) and with a closing wall (33) of the plunger (3) contiguous with the second sealing lip (16) so as to define the dose chamber (32), the tubular end (12) of the plunger (3) being moved so that it bears against the closing membrane (20) of the annular valve (4) in a non-operating position and closes the dose chamber (32) during the first displacement step between the non-operating position and the dispensing position, and is moved away during the second step of this displacement in order to release the dispensing orifice (42) and afford a passage for the product contained in the dose chamber (32) between this end (12) and the median rod (6) of the pushing means (2) enabling it to be evacuated via the ejection passage (9) and the ejection orifice (11).
  5. Metering pump as claimed in any one of claims 1 to 4,
    characterised in that
    the median rod (6) of the pushing means (2) is provided with at least one longitudinal groove (7) on a level with its free end (8) and preferably a series of longitudinal grooves (7) uniformly distributed around its periphery.
  6. Metering pump as claimed in any one of claims 1 to 5.,
    characterised in that
    the front-end face (101) of the pump body (1) has receiving elements (23) for the annular valve (4).
  7. Metering pump as claimed in claim 6,
    characterised in that
    the receiving elements (23) of the annular valve (4) comprise a tubular sleeve (24) surrounding the filling orifice (25) and on the one hand comprise a cylindrically shaped external face (26) and a conically shaped internal face (27) inclined in the direction of the filling orifice (25) and on the other hand are provided with wedge-shaped radial slots (28), which conical internal face (27) serves as a seating for the closing membrane (20) whilst the cylindrical external face (26) co-operates with the pump body (1) to define a fitting mount (29) for the cylindrical collar (28) of the annular valve (4).
  8. Metering pump as claimed in claim 7,
    characterised in that
    the side wall (101) of the pump body (1) is provided with an obliquely inclined shoulder (30) which forms a seat for the flange (21) of the annular valve (4) and is extended flush with the fitting mount (29) by means of a series of slots (31, 34) defining passages towards the dose chamber (32) for the product contained in the receptacle.
EP02730397A 2001-05-10 2002-05-07 Metering pump Expired - Lifetime EP1385633B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0106175 2001-05-10
FR0106175A FR2824538B1 (en) 2001-05-10 2001-05-10 METERING PUMP
PCT/FR2002/001564 WO2002089996A1 (en) 2001-05-10 2002-05-07 Metering pump

Publications (2)

Publication Number Publication Date
EP1385633A1 EP1385633A1 (en) 2004-02-04
EP1385633B1 true EP1385633B1 (en) 2007-11-21

Family

ID=8863114

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02730397A Expired - Lifetime EP1385633B1 (en) 2001-05-10 2002-05-07 Metering pump

Country Status (6)

Country Link
US (1) US7178701B2 (en)
EP (1) EP1385633B1 (en)
DE (1) DE60223671T2 (en)
ES (1) ES2296925T3 (en)
FR (1) FR2824538B1 (en)
WO (1) WO2002089996A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1015973A3 (en) * 2004-04-09 2005-12-06 Oultremont Aurian D Liquid freshener spraying device for refreshing user during extreme heat, has spritzer fixed, by screw thread, on flexible bag having freshener, where bag has suspension unit which, using twine, permits to suspend it around user`s neck
WO2013160632A1 (en) * 2012-04-27 2013-10-31 Perkins Engines Company Limited Improvements in valves
WO2017206603A1 (en) * 2016-06-02 2017-12-07 江苏德晋塑料包装有限公司 Quantitative pressable spraying head and container having the quantitative pressable spraying head
MX2022015035A (en) * 2020-05-29 2023-01-04 Rpc Bramlage Gmbh Pump for dispensing a fluid.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211346A (en) * 1964-07-15 1965-10-12 Meshberg Philip Pump-type dispenser
US3753518A (en) * 1971-05-07 1973-08-21 L Kutik Pump with floating valve element
US4911336A (en) * 1988-09-23 1990-03-27 Blake William S Valve with interchangeable components
FR2674024B1 (en) * 1991-03-11 1994-03-11 Daniel Crosnier METERING DEVICE ADAPTABLE TO VARIOUS CONTAINERS.
FR2728809B1 (en) * 1995-01-04 1997-04-04 Daniel Crosnier DOSING DEVICE ADAPTABLE TO VARIOUS CONTAINERS

Also Published As

Publication number Publication date
ES2296925T3 (en) 2008-05-01
US20050023298A1 (en) 2005-02-03
WO2002089996A1 (en) 2002-11-14
FR2824538A1 (en) 2002-11-15
WO2002089996A8 (en) 2003-12-04
US7178701B2 (en) 2007-02-20
FR2824538B1 (en) 2004-01-16
EP1385633A1 (en) 2004-02-04
DE60223671D1 (en) 2008-01-03
DE60223671T2 (en) 2008-10-30

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