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EP1392583B1 - Dosage pump - Google Patents

Dosage pump Download PDF

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Publication number
EP1392583B1
EP1392583B1 EP02743333A EP02743333A EP1392583B1 EP 1392583 B1 EP1392583 B1 EP 1392583B1 EP 02743333 A EP02743333 A EP 02743333A EP 02743333 A EP02743333 A EP 02743333A EP 1392583 B1 EP1392583 B1 EP 1392583B1
Authority
EP
European Patent Office
Prior art keywords
piston
opening
metering
metering chamber
inner portion
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
EP02743333A
Other languages
German (de)
French (fr)
Other versions
EP1392583A1 (en
Inventor
Daniel Crosnier
Jean-Marie Dulery
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1392583A1 publication Critical patent/EP1392583A1/en
Application granted granted Critical
Publication of EP1392583B1 publication Critical patent/EP1392583B1/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
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
    • B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
    • B05B1/3421—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber
    • B05B1/3431—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves
    • B05B1/3436—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves the interface being a plane perpendicular to the outlet axis
    • 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
    • B05B11/1021—Piston pumps having an outlet valve which is a gate 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
    • B05B11/10—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
    • B05B11/1066—Pump inlet valves
    • 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

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 food products of different viscosities, ranging from liquid products to products having the consistency of cream.
  • metering pumps comprising a pump body that can be adapted to the container and communicating with the internal part thereof, as well as control means cooperating with the pump body to define a dose chamber. and operable from the outside so as to be movable between a dispensing position and a resting position to permit the expulsion of a dose of product from the dose chamber outwardly through an expulsion aperture, and then transferring a new dose of product from the container to the dose chamber and so on.
  • control means are resiliently biased from the dispensing position to the rest position in the absence of any external stress exerted on them, creating a vacuum allowing the suction of a dose from product to the dose chamber.
  • the object of the present invention is to remedy these drawbacks by proposing a simple, efficient and reliable metering pump and at the same time a remarkably low cost.
  • the invention relates to a metering pump of the aforementioned type having the characteristics according to the second part of claim 1.
  • the actuating members are provided on their external face with a shoulder forming a stop capable of cooperating with a corresponding abutment shoulder provided on the internal face of the pusher or of an element integral with that to secure these elements in translation along the pump body.
  • control members are designed so that from the rest position in which the dose chamber which contains a dose of product is in communication with the inner part of the container but is isolated from the opening of the container. expulsion, the displacement of the control means to the dispensing position is carried out in two steps, namely, firstly a first step during which the pusher slides in the pump body independently of the actuating members so as to isolating the dose chamber from the inner part of the container while this chamber comes into communication with the expulsion opening, and secondly a second step during which the pusher and the actuating members slide integrally into the pump body and the piston compresses the product in the dose chamber to allow it to expel outwardly through the expulsion aperture.
  • the return spring automatically recalls the control means to the rest position, in two steps, namely on the one hand a first step during which the pusher slides in the pump body independently of the actuating members so as to put the dose chamber in communication with the inner part of the container and isolating the dose chamber from the expulsion opening, and secondly a second step during which the pusher and the actuating members slide integrally into the pump body creating a vacuum allowing suction of a dose of product to the dose chamber, following the engagement of the two shoulders forming abutment.
  • the piston comprises a connecting opening pierced in the body thereof and capable of being placed in communication with the dose chamber and with the expulsion opening.
  • connection opening may advantageously be connected to a vortex system provided at the internal part of the piston body and capable of cooperating with the opening expulsion so as to allow the vaporization and spraying of this liquid product to the outside.
  • the piston body is not equipped with such a vortex system.
  • the actuating members are constituted by the piston itself.
  • This first variant applies in particular to the production of advertising samples or mini-dosing pumps called "mini-spray pumps” especially for handbags intended to allow the vaporization of perfume, toilet water, etc ... .
  • the pusher is provided at its inner part with a substantially cylindrical center end surrounded by an annular housing receiving the upper end of the piston body.
  • This median tip is equipped on the one hand at its periphery with a circular sealing bead bearing against the inner face the piston body for isolating the dose chamber from the connection opening and secondly at its lower end a seat-forming nipple for an annular seal provided at the upper end of a fixed hollow middle rod coaxially on the inner face of the piston body so as to isolate the dose chamber from the inner part of the container.
  • the dose chamber is delimited at its upper part by the internal face of the piston body and by the external face of the middle stem thereof and is capable of being placed in communication with the piston. connecting opening and the expulsion opening or with the inner part of the container by a dispensing opening pierced on the upper face thereof and connected to a longitudinal distribution groove formed on the inner wall of the piston body.
  • the expulsion opening is closed by the piston body in the rest position.
  • the piston is integral with the pusher and the actuating members are constituted by a nozzle comprising a tubular body closed at its upper end and open at its lower end so as to be in communication with the inner part of the container.
  • the nozzle body is slidable along the inner face of the piston body.
  • This second variant of the invention can be adapted to the manufacture of mini-pumps called "mini-spray pumps” for handbags, samples, ..., but also to the manufacture of pumps for the distribution of larger doses liquids or more viscous products such as lotions or creams.
  • the piston is equipped on its inner face with an annular seal bearing against the outer periphery of the body of the nozzle to isolate the dose chamber from the connecting opening or the inner part of the container.
  • the dose chamber is delimited at its upper part by the inner face of the piston body and the outer face of the body of the nozzle and is capable of being placed in communication on the one hand with the inner part of the container through a through passage opening pierced through the body of the nozzle, and secondly with the connection opening and the expulsion opening by a longitudinal distribution groove formed on the outer face of the nozzle body at the same level as the passage opening.
  • the metering pump essentially consists of a pump body 1 of tubular shape that can be adapted to a container that is not shown, as well as a pusher 2 that can slide along the inner wall of this pump body 1 between a position resting position shown in Figure 1 and a dispensing position shown in Figure 2.
  • the pump body 1 is equipped with a dip tube 3 allowing suction of the product contained in the container and its expulsion outwards through an expulsion opening 4 provided on the lateral face of the pusher 2, in a manner which will be described in more detail later in this presentation.
  • a return spring 5 is housed between the pump body 1 and the pusher 2.
  • the pusher is equipped at its inner part with an essentially cylindrical center nozzle 6 which is surrounded by an annular housing 7 in which is inserted the upper end of a piston 8.
  • the piston 8 consists of a tubular body 9 introduced into the annular housing 7 of the pusher 2 by its upper end.
  • the outer wall 33 of the annular housing 7 of the pusher 2 is provided with a rib 34 forming a key cooperating with a corresponding rib 35 of the tubular body 9 of the piston 8 so as to secure these two elements in rotation.
  • the body 9 of the piston 8 further comprises at its inner part a hollow rod 10 fixed coaxially thereto by an annular wall 11.
  • the hollow rod 10 is equipped with an annular seal 12 at its upper end.
  • the body 9 of the piston 8 is itself equipped with a connecting opening 13 capable of communicating with the expulsion opening 4 of the pusher 2 in a manner to be described in more detail later in this discussion.
  • the rib 34 and the groove 35 ensure that these two openings 4, 13 are constantly correctly oriented relative to each other.
  • the plunger tube 3 of the pump body 1 is extended to the inner part of the latter by a tubular sleeve 14 receiving the lower end of the hollow rod 10 of the piston 8.
  • the hollow rod 10 is equipped on its outer periphery with a bead 27 capable of rubbing against the inner wall of the tubular sleeve 14 of the pump body 1 so as to cause frictional braking of the sliding of the piston 8 in the pump body 1.
  • the tubular sleeve 14 is also surrounded by a collar 15 on the inner face of which abuts a seal annular seal 16 provided at the lower end of the body 9 of the pump 8.
  • the tubular sleeve 14 and the collar 15 of the pump body 1 as well as the hollow rod 10 and the lower part of the body 9 of the piston 8 thus delimit a dose chamber 17 which is closed at its upper part by the annular wall 11 and is maintained. sealing against the outer periphery of the piston 8 by the annular seal 16.
  • the return spring 5 is mounted on the pump body 1 outside the collar 15 and is therefore not in contact with the dose chamber 17.
  • the body 9 of the piston 8 is also equipped at its upper end with an annular seal 18 which is constantly applied against the periphery of the nozzle 6 so as to guarantee the seal between this nozzle and the piston 8. this level.
  • the median end piece 6 of the pusher 2 is further equipped on its periphery with a circular sealing bead 19 which bears against the internal face of the body 9 of the piston 8 so as to allow isolating the dose chamber 17 from the connecting opening 13 in a manner to be described in more detail later in this discussion.
  • the median tip 6 of the pusher 2 is also equipped at its lower end with a seat 20 for the ring seal 12 fitted to the hollow rod 10 of the piston 8 so as to isolate the dose chamber 17 of the inner part of the container, this in a manner which will be described here in more detail later in this presentation.
  • the annular wall 11 of the piston 8 which closes the dose chamber 17 at its upper part is pierced with a dispensing opening 21 opening into a longitudinal distribution groove 22 formed on the inner wall of the piston body 9 .
  • connection opening 13 is connected to a vortex system 23 by a circular channel 24 from which rectilinear branches 25 converge towards a central channel 26 that can be put into communication with the expulsion opening 4 as shown in FIG. 2, whereas in the rest position shown in FIG. 1, the expulsion opening 4 is closed by the body 9 of the piston 8.
  • the upper end of the piston 8 is located at a distance X from the upper face of the pusher 2 and the dose chamber 17 is filled with a dose of the product to be dispensed.
  • the axis of the median channel 26 of the vortex system 23 is also located at a distance X from the expulsion opening 4.
  • the pin 20 abuts against the annular seal 12 of the hollow rod 10 to isolate the dose chamber 17 from the inner part of the container and simultaneously the circular sealing bead 19 of the tip 6 is placed next to the distribution groove 22 of the body 9 of the piston 8 to put the dose chamber 17 in communication with the connecting opening 13, and the expulsion opening 4 is located at the right of the channel median 26 of the vortex system 23.
  • the dose chamber 17 is thus in communication with the outside.
  • the product contained in the dose chamber 17 is expelled outwards by the path shown in dotted lines and schematized by the arrows a through the dispensing opening 21 then by the distribution groove 22 and along the median tip 6 of the pusher 2 to reach the connection opening 13 and then in the vortex system 23 and finally in the expulsion opening 4 through the median canal 26.
  • This position is materialized by the abutment of the lower end 28 of the pusher 2 against an antagonistic surface 29 of the pump body 1.
  • the circular sealing bead 19 of the nozzle 6 disengages from the distribution groove 22 and rests against the inner face of the body 9 of the piston 8 to isolate the dose chamber 17 from the connection opening 13 .
  • the piston 8 thus remains stationary until a shoulder forming a stop 30 provided on the internal face of the pusher 2 bears against a shoulder forming an abutment 31 provided on the external face of the body 9 of the piston 8.
  • the upper end of the body 9 of the piston 8 is again at a distance X from the upper face of the pusher 2.
  • the pusher 2 drives the piston 8 integrally in translation along the pump body 1.
  • the sucked product thus passes into the dip tube 3 and then to the inner part of the tubular sleeve 14 of the pump body and then to the internal part of the hollow rod 10 and between the annular seal 12 and the nipple 20 of the tip 6 of the pusher 2 before finally reaching the dose chamber 17.
  • the dosing pump is also essentially constituted by a pump body 101 of tubular shape that can be adapted to a receptacle as well as by a pusher 102 that can slide along the inner wall of this pump body 101 between a rest position shown in Figure 4 and a dispensing position not shown.
  • the pusher 102 is shown in an intermediate position between the rest position and the dispensing position.
  • the pump body 101 is equipped with a plunger tube 103 allowing suction of the product contained in the container and its expulsion outwards through an expulsion opening 104 provided on the lateral face of the pusher 102 in a way that will be described in more detail later in this presentation.
  • the pump body 101 is furthermore equipped with an external air intake 140 which may optionally be omitted in certain configurations.
  • a return spring 105 is housed between the pump body 101 and the pusher 102.
  • This spring 105 automatically recalls the pusher 102 in the rest position shown in Figure 4 in the absence of any external stress exerted on him.
  • the user can move the pusher 102 down the figure towards the dispensing position by exerting a pressure F on the upper face thereof.
  • the pusher 102 is provided at its inner portion with a median housing 106 in which is fixed the upper end of a piston 108 consisting of a tubular body.
  • This piston 108 is thus secured to the pusher 102 during its movement between the dispensing position and the rest position.
  • the piston 108 is equipped at its lower end with an annular seal 109 which is constantly pressing against the inner face of the pump body 101.
  • the piston 108 is furthermore equipped, at its upper part, with a connecting opening 113 communicating constantly with the expulsion opening 104 of the pusher 102 via a vortex system 123 similar to the vortex system 23 equipping the pump.
  • the metering pump also comprises a nozzle 107 constituted by a substantially cylindrical tubular body 110 closed at its upper end by a circular front wall 111 and open at its lower end so as to be in communication with the internal part of the container.
  • the plunger tube 103 extends into the pump body 101 by a tubular sleeve 114 receiving the lower end 115 of the tubular body 110 of the nozzle 107 at its inner portion.
  • the tubular body 110 of the nozzle 107 is equipped at this level with an external bead 127 capable of rubbing against the inner wall of the tubular sleeve 114 so as to slow the displacement of the nozzle 107 in the pump body 101.
  • the piston 108 is provided on its inner periphery with an annular seal 112 which bears against the body 110 of the nozzle 107.
  • the tubular sleeve 114, the periphery of the pump body 101, the piston 108 and the tubular body 110 of the nozzle 107 define a dose chamber 117.
  • This dose chamber 117 is hermetically closed by the annular seal 109 of the piston 108 and can be isolated from the inner part of the container or the connecting opening 113 and the expulsion opening 104 in a way that will be described in more detail later in this presentation.
  • the return spring 105 is mounted on the outside of a flange 116 of the pump body 101 surrounding the tubular sleeve 114 and is thus constantly isolated from the dose chamber 117.
  • the body 110 of the nozzle 107 is furthermore equipped on the one hand with a through-passage opening 121 pierced therethrough, and on the other hand with a longitudinal distribution groove 122 formed on the external face of the body. nozzle 110 at the same level as the passage opening 121.
  • the passage opening 121 makes it possible to put the dose chamber 117 in communication with the internal part of the receptacle while the dispensing groove 122 makes it possible to put this chamber 117 in communication with the patient. link opening 113 and the expulsion opening 104.
  • the front wall 111 of the nozzle 107 is located at a distance X from the upper face of the pusher 102 and the dose chamber 117 is filled with a dose of the product to be dispensed.
  • the annular seal 112 does not close the passage opening 121 and the dose chamber 117 is consequently in communication with the internal part of the container.
  • the annular seal 112 closes the passage opening 121 to isolate the dose chamber 117 from the inner part of the container, and is simultaneously placed opposite the distribution groove 122. As a result the dose chamber is placed in communication with the connection opening 113 and the expulsion opening 104.
  • the product contained in the dose chamber 117 is thus expelled outwards by the path schematized by the arrows c passing through the distribution groove 122, then around the outer wall of the body 110 of the nozzle 107 to to reach the connection opening 113 then the vortex system 123 and finally the expulsion opening 104.
  • the nozzle 107 remains stationary given the presence of the friction bead 127; as a result the annular seal 112 emerges from the passage opening 121 to bring the dose chamber 117 in communication with the inner part of the container.
  • the annular seal 121 simultaneously bears against the outer periphery of the body 110 of the nozzle 107 while disengaging from the dispensing groove 122 and thus isolates the dose chamber 117 from the connection opening 113 and the opening of the expulsion 104.
  • the nozzle 107 thus remains stationary until a shoulder forming a stop 130 provided on the internal face of the piston 108 bears against an abutment forming abutment shoulder 131 provided thereon.
  • the circular front wall 111 of the nozzle 107 is again at a distance X from the upper face of the pusher 102, in the position shown in FIG.
  • the sucked product thus passes into the dip tube 3 and then to the inner part of the body 110 of the nozzle 107 before entering the dose chamber 117 through the passage opening 121.

Landscapes

  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Peptides Or Proteins (AREA)
  • Vending Machines For Individual Products (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Reciprocating Pumps (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Eye Examination Apparatus (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

A dosage pump which includes a pump body and a control means with rest and distribution positions. The control means includes a dosing chamber, a return spring, and a member to ensure friction braking of the sliding movement of the actuating members of the pump.

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 crème.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 food products of different viscosities, ranging from liquid products to products having the consistency of cream.

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. Le principal inconvénient de telles pompes est qu'elles sont constituées de nombreuses pièces, ce qui fait que les coûts de fabrication et d'assemblage sont élevés.There are on the market for many years, different types of metering pumps that all implement a number of parts such as springs, balls, valves, plugs and others. The main disadvantage of such pumps is that they consist of many parts, which means that manufacturing and assembly costs are high.

Pour remédier à ces inconvénients, on a déjà proposé des pompes doseuses, comprenant un corps de pompe adaptable sur le récipient et communiquant avec la partie interne de celui-ci ainsi que des moyens de commande coopérant avec le corps de pompe pour définir une chambre dose et actionnables de l'extérieur de façon à pouvoir être déplacés entre une position de distribution et une position de repos pour 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 overcome these drawbacks, metering pumps have already been proposed, comprising a pump body that can be adapted to the container and communicating with the internal part thereof, as well as control means cooperating with the pump body to define a dose chamber. and operable from the outside so as to be movable between a dispensing position and a resting position to permit the expulsion of a dose of product from the dose chamber outwardly through an expulsion aperture, and then transferring a new dose of product from the container to the dose chamber and so on.

Conformément à cet art antérieur, les moyens de commande sont rappelés élastiquement 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 resiliently biased from the dispensing position to the rest position in the absence of any external stress exerted on them, creating a vacuum allowing the suction of a dose from product to the dose chamber.

Malgré leurs qualités propres indéniables, de telles pompes doseuses présentent l'inconvénient d'être souvent relativement onéreuses.Despite their undeniable intrinsic qualities, such dosing pumps have the disadvantage of being often relatively expensive.

La présente invention a pour objet de remédier à ces inconvénients en proposant une pompe doseuse simple, efficace et fiable et parallèlement d'un coût remarquablement peu élevé.The object of the present invention is to remedy these drawbacks by proposing a simple, efficient and reliable metering pump and at the same time a remarkably low cost.

A cet effet, l'invention concerne une pompe doseuse du type susmentionné ayant les caractéristiques selon la deuxième partie de la revendication 1.For this purpose, the invention relates to a metering pump of the aforementioned type having the characteristics according to the second part of claim 1.

Selon une autre caractéristique de l'invention, les organes d'actionnement sont munis sur leur face externe d'un épaulement formant butée susceptible de coopérer avec un épaulement formant butée correspondant prévu sur la face interne du poussoir ou d'un élément solidaire de celui-ci pour solidariser ces éléments en translation le long du corps de pompe.According to another characteristic of the invention, the actuating members are provided on their external face with a shoulder forming a stop capable of cooperating with a corresponding abutment shoulder provided on the internal face of the pusher or of an element integral with that to secure these elements in translation along the pump body.

Selon l'invention, les organes de commande sont conçus de sorte qu'à partir de la position de repos dans laquelle la chambre dose qui contient une dose de produit est en communication avec la partie interne du récipient mais est isolée de l'ouverture d'expulsion, le déplacement des moyens de commande vers la position de distribution s'effectue en deux étapes, à savoir, d'une part une première étape pendant laquelle le poussoir glisse dans le corps de pompe indépendamment des organes d'actionnement de façon à isoler la chambre dose de la partie interne du récipient tandis que cette chambre vient en communication avec l'ouverture d'expulsion, et d'autre part une seconde étape pendant laquelle le poussoir et les organes d'actionnement glissent solidairement dans le corps de pompe et le piston comprime le produit se trouvant dans la chambre dose de façon à permettre son expulsion vers l'extérieur par l'ouverture d'expulsion.According to the invention, the control members are designed so that from the rest position in which the dose chamber which contains a dose of product is in communication with the inner part of the container but is isolated from the opening of the container. expulsion, the displacement of the control means to the dispensing position is carried out in two steps, namely, firstly a first step during which the pusher slides in the pump body independently of the actuating members so as to isolating the dose chamber from the inner part of the container while this chamber comes into communication with the expulsion opening, and secondly a second step during which the pusher and the actuating members slide integrally into the pump body and the piston compresses the product in the dose chamber to allow it to expel outwardly through the expulsion aperture.

Inversement, à partir de la position de distribution dans laquelle la chambre dose qui est vide de produit est en communication avec l'ouverture d'expulsion mais est isolée de la partie interne du récipient, le ressort de rappel rappelle automatiquement les moyens de commande vers la position de repos, ce en deux étapes, à savoir d'une part une première étape pendant laquelle le poussoir glisse dans le corps de pompe indépendamment des organes d'actionnement de façon à mettre la chambre dose en communication avec la partie interne du récipient et à isoler la chambre dose de l'ouverture d'expulsion, et d'autre part une seconde étape pendant laquelle le poussoir et les organes d'actionnement glissent solidairement dans le corps de pompe en créant une dépression permettant l'aspiration d'une dose de produit vers la chambre dose, ce suite à la mise en prise des deux épaulements formant butée.Conversely, from the dispensing position in which the dose chamber which is empty of product is in communication with the expulsion opening but is isolated from the inner part of the container, the return spring automatically recalls the control means to the rest position, in two steps, namely on the one hand a first step during which the pusher slides in the pump body independently of the actuating members so as to put the dose chamber in communication with the inner part of the container and isolating the dose chamber from the expulsion opening, and secondly a second step during which the pusher and the actuating members slide integrally into the pump body creating a vacuum allowing suction of a dose of product to the dose chamber, following the engagement of the two shoulders forming abutment.

Selon une autre caractéristique de l'invention, le piston comporte une ouverture de liaison percée dans le corps de celui-ci et susceptible d'être mise en communication avec la chambre dose et avec l'ouverture d'expulsion.According to another characteristic of the invention, the piston comprises a connecting opening pierced in the body thereof and capable of being placed in communication with the dose chamber and with the expulsion opening.

Lorsque la pompe doseuse est destinée à la distribution de produits liquides tels que parfums ou eaux de toilette, l'ouverture de liaison peut avantageusement être reliée à un système tourbillonnaire prévu à la partie interne du corps du piston et susceptible de coopérer avec l'ouverture d'expulsion de façon à permettre la vaporisation et la pulvérisation de ce produit liquide vers l'extérieur.When the dosing pump is intended for dispensing liquid products such as perfumes or eau de toilette, the connection opening may advantageously be connected to a vortex system provided at the internal part of the piston body and capable of cooperating with the opening expulsion so as to allow the vaporization and spraying of this liquid product to the outside.

Bien entendu, dans le cas où la pompe doseuse est destinée à la distribution de produits plus visqueux tels que lotions ou crèmes, le corps du piston n'est pas équipé d'un tel système tourbillonnaire.Of course, in the case where the metering pump is intended for dispensing more viscous products such as lotions or creams, the piston body is not equipped with such a vortex system.

Selon une première variante de l'invention, les organes d'actionnement sont constitués par le piston lui-même.According to a first variant of the invention, the actuating members are constituted by the piston itself.

Cette première variante s'applique en particulier à la fabrication d'échantillons publicitaires ou de mini-pompes doseuses dites « mini-pompes spray » en particulier pour sacs à main destinées à permettre la vaporisation de parfum, eau de toilette, etc....This first variant applies in particular to the production of advertising samples or mini-dosing pumps called "mini-spray pumps" especially for handbags intended to allow the vaporization of perfume, toilet water, etc ... .

Conformément à cette première variante, le poussoir est muni à sa partie interne d'un embout médian essentiellement cylindrique entouré d'un logement annulaire recevant l'extrémité supérieure du corps du piston.According to this first variant, the pusher is provided at its inner part with a substantially cylindrical center end surrounded by an annular housing receiving the upper end of the piston body.

Cet embout médian est équipé d'une part à sa périphérie d'un cordon d'étanchéité circulaire venant en appui contre la face interne du corps du piston pour isoler la chambre dose de l'ouverture de liaison et d'autre part à son extrémité inférieure d'un téton formant siège pour un joint d'étanchéité annulaire prévu à l'extrémité supérieure d'une tige médiane creuse fixée coaxialement sur la face interne du corps du piston de façon à isoler la chambre dose de la partie interne du récipient.This median tip is equipped on the one hand at its periphery with a circular sealing bead bearing against the inner face the piston body for isolating the dose chamber from the connection opening and secondly at its lower end a seat-forming nipple for an annular seal provided at the upper end of a fixed hollow middle rod coaxially on the inner face of the piston body so as to isolate the dose chamber from the inner part of the container.

Selon une autre caractéristique de cette première variante, la chambre dose est délimitée à sa partie supérieure par la face interne du corps du piston et par la face externe de la tige médiane de celui-ci et est susceptible d'être mise en communication avec l'ouverture de liaison et l'ouverture d'expulsion ou avec la partie interne du récipient par une ouverture de distribution percée sur la face supérieure de celle-ci et reliée à une rainure de distribution longitudinale ménagée sur la paroi interne du corps du piston.According to another characteristic of this first variant, the dose chamber is delimited at its upper part by the internal face of the piston body and by the external face of the middle stem thereof and is capable of being placed in communication with the piston. connecting opening and the expulsion opening or with the inner part of the container by a dispensing opening pierced on the upper face thereof and connected to a longitudinal distribution groove formed on the inner wall of the piston body.

Selon une autre caractéristique de cette première variante l'ouverture d'expulsion est obturée par le corps du piston en position de repos.According to another characteristic of this first variant, the expulsion opening is closed by the piston body in the rest position.

Il s'agit là d'une caractéristique avantageuse vu qu'elle permet de protéger le produit qui se trouve « en attente » entre la chambre dose et l'ouverture d'expulsion, ce qui est relativement important pour retarder l'oxydation de certains produits fragiles (parfums, lotions, ...).This is an advantageous characteristic since it makes it possible to protect the product that is "waiting" between the dose chamber and the expulsion opening, which is relatively important for delaying the oxidation of certain fragile products (perfumes, lotions, ...).

Selon une seconde variante de l'invention, le piston est solidaire du poussoir et les organes d'actionnement sont constitués par un gicleur comportant un corps tubulaire fermé à son extrémité supérieure et ouvert à son extrémité inférieure de façon à pouvoir être mis en communication avec la partie interne du récipient.According to a second variant of the invention, the piston is integral with the pusher and the actuating members are constituted by a nozzle comprising a tubular body closed at its upper end and open at its lower end so as to be in communication with the inner part of the container.

Le corps du gicleur est susceptible de glisser le long de la face interne du corps du piston.The nozzle body is slidable along the inner face of the piston body.

Cette seconde variante de l'invention peut s'adapter à la fabrication de mini-pompes dites « mini-pompes spray » pour sacs à main, échantillons, ..., mais également à la fabrication de pompes permettant la distribution de doses plus importantes de liquides ou de produits plus visqueux tels que lotions ou crèmes.This second variant of the invention can be adapted to the manufacture of mini-pumps called "mini-spray pumps" for handbags, samples, ..., but also to the manufacture of pumps for the distribution of larger doses liquids or more viscous products such as lotions or creams.

Selon cette seconde variante, le piston est équipé sur sa face interne d'un joint d'étanchéité annulaire venant en appui contre la périphérie externe du corps du gicleur pour isoler la chambre dose de l'ouverture de liaison ou de la partie interne du récipient.According to this second variant, the piston is equipped on its inner face with an annular seal bearing against the outer periphery of the body of the nozzle to isolate the dose chamber from the connecting opening or the inner part of the container. .

Selon une autre caractéristique de cette seconde variante, la chambre dose est délimitée à sa partie supérieure par la face interne du corps du piston et par la face externe du corps du gicleur et est susceptible d'être mise en communication d'une part avec la partie interne du récipient par une ouverture de passage traversante percée au travers du corps du gicleur, et d'autre part avec l'ouverture de liaison et l'ouverture d'expulsion par une rainure de distribution longitudinale ménagée sur la face externe du corps du gicleur au même niveau que l'ouverture de passage.According to another characteristic of this second variant, the dose chamber is delimited at its upper part by the inner face of the piston body and the outer face of the body of the nozzle and is capable of being placed in communication on the one hand with the inner part of the container through a through passage opening pierced through the body of the nozzle, and secondly with the connection opening and the expulsion opening by a longitudinal distribution groove formed on the outer face of the nozzle body at the same level as the passage opening.

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 d'une pompe doseuse correspondant à la première variante de l'invention représentée en position de repos,
  • la figure la est une vue en coupe partielle de la figure 1 selon un plan schématisé par l'axe I-I,
  • la figure 2 est une vue de détail correspondant à la figure 1 mais représentant la pompe en position de distribution,
  • la figure 3 est une vue de face du piston de cette pompe représentant le système tourbillonnaire,
  • la figure 4 est une vue en coupe d'une pompe doseuse correspondant à la seconde variante de l'invention représentée en position de repos,
  • la figure 5 est une vue en coupe correspondant à la figure 4 mais représentant cette même pompe dans une position intermédiaire entre la position le repos et la position de distribution.
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 a metering pump corresponding to the first variant of the invention shown in the rest position,
  • FIG. 1a is a partial sectional view of FIG. 1 along a plane schematized by axis II;
  • FIG. 2 is a detail view corresponding to FIG. 1 but showing the pump in dispensing position,
  • FIG. 3 is a front view of the piston of this pump representing the vortex system,
  • FIG. 4 is a sectional view of a metering pump corresponding to the second variant of the invention shown in the rest position,
  • Figure 5 is a sectional view corresponding to Figure 4 but showing the same pump in an intermediate position between the rest position and the dispensing position.

Selon la figure 1, la pompe doseuse est essentiellement constituée par un corps de pompe 1 de forme tubulaire adaptable sur un récipient non représenté ainsi que par un poussoir 2 susceptible de coulisser le long de la paroi interne de ce corps de pompe 1 entre une position de repos représentée sur la figure 1 et une position de distribution représentée sur la figure 2.According to FIG. 1, the metering pump essentially consists of a pump body 1 of tubular shape that can be adapted to a container that is not shown, as well as a pusher 2 that can slide along the inner wall of this pump body 1 between a position resting position shown in Figure 1 and a dispensing position shown in Figure 2.

Le corps de pompe 1 est équipé d'un tube plongeur 3 permettant l'aspiration du produit contenu dans le récipient et son expulsion vers l'extérieur par une ouverture d'expulsion 4 prévue sur la face latérale du poussoir 2, d'un façon qui sera décrite plus en détail dans la suite de cet exposé.The pump body 1 is equipped with a dip tube 3 allowing suction of the product contained in the container and its expulsion outwards through an expulsion opening 4 provided on the lateral face of the pusher 2, in a manner which will be described in more detail later in this presentation.

Selon les figures 1 et 2, un ressort de rappel 5 est logé entre le corps de pompe 1 et le poussoir 2.According to FIGS. 1 and 2, a return spring 5 is housed between the pump body 1 and the pusher 2.

A partir de la position de repos représentée sur la figure 1, l'utilisateur peut déplacer le poussoir 2 dans la position de distribution représentée sur la figure 2 en exerçant une pression F sur la face supérieure de celui-ci.From the rest position shown in Figure 1, the user can move the pusher 2 in the dispensing position shown in Figure 2 by exerting a pressure F on the upper face thereof.

A partir de cette position de distribution, le ressort 5 rappelle automatiquement le poussoir 2 dans la position de repos représentée sur la figure 1.From this dispensing position, the spring 5 automatically recalls the pusher 2 in the rest position shown in FIG.

Par ailleurs, le poussoir est équipé à sa partie interne d'un embout médian 6 essentiellement cylindrique qui est entouré d'un logement annulaire 7 dans lequel est insérée l'extrémité supérieure d'un piston 8.Furthermore, the pusher is equipped at its inner part with an essentially cylindrical center nozzle 6 which is surrounded by an annular housing 7 in which is inserted the upper end of a piston 8.

Selon les figures 1 et 2, le piston 8 est constitué d'un corps tubulaire 9 introduit dans le logement annulaire 7 du poussoir 2 par son extrémité supérieure.According to Figures 1 and 2, the piston 8 consists of a tubular body 9 introduced into the annular housing 7 of the pusher 2 by its upper end.

Selon les figures 1 et 1a, la paroi externe 33 du logement annulaire 7 du poussoir 2 est munie d'une nervure 34 formant clavette coopérant avec une nervure correspondante 35 du corps tubulaire 9 du piston 8 de façon à solidariser ces deux éléments en rotation.According to Figures 1 and 1a, the outer wall 33 of the annular housing 7 of the pusher 2 is provided with a rib 34 forming a key cooperating with a corresponding rib 35 of the tubular body 9 of the piston 8 so as to secure these two elements in rotation.

Le corps 9 du piston 8 comporte en outre à sa partie interne une tige creuse 10 fixée coaxialement à celui-ci par une paroi annulaire 11.The body 9 of the piston 8 further comprises at its inner part a hollow rod 10 fixed coaxially thereto by an annular wall 11.

La tige creuse 10 est équipée d'un joint d'étanchéité annulaire 12 à son extrémité supérieure.The hollow rod 10 is equipped with an annular seal 12 at its upper end.

Le corps 9 du piston 8 est quant à lui équipé d'une ouverture de liaison 13 susceptible de communiquer avec l'ouverture d'expulsion 4 du poussoir 2 d'une façon qui sera décrite plus en détail dans la suite de cet exposé.The body 9 of the piston 8 is itself equipped with a connecting opening 13 capable of communicating with the expulsion opening 4 of the pusher 2 in a manner to be described in more detail later in this discussion.

La nervure 34 et la rainure 35 permettent de garantir que ces deux ouvertures 4, 13 soient constamment correctement orientées l'une par rapport à l'autre.The rib 34 and the groove 35 ensure that these two openings 4, 13 are constantly correctly oriented relative to each other.

Selon la figure 1, le tube plongeur 3 du corps de pompe 1 se prolonge à la partie interne de ce dernier par un manchon tubulaire 14 recevant l'extrémité inférieure de la tige creuse 10 du piston 8.According to FIG. 1, the plunger tube 3 of the pump body 1 is extended to the inner part of the latter by a tubular sleeve 14 receiving the lower end of the hollow rod 10 of the piston 8.

Selon les figures 1 et 2 la tige creuse 10 est équipée sur sa périphérie externe d'un bourrelet 27 susceptible de frotter contre la paroi interne du manchon tubulaire 14 du corps de pompe 1 de façon à entraîner un freinage par friction du glissement du piston 8 dans le corps de pompe 1.According to Figures 1 and 2 the hollow rod 10 is equipped on its outer periphery with a bead 27 capable of rubbing against the inner wall of the tubular sleeve 14 of the pump body 1 so as to cause frictional braking of the sliding of the piston 8 in the pump body 1.

Le manchon tubulaire 14 est par ailleurs entouré par une collerette 15 sur la face interne de laquelle vient en appui un joint d'étanchéité annulaire 16 prévu à l'extrémité inférieure du corps 9 de la pompe 8.The tubular sleeve 14 is also surrounded by a collar 15 on the inner face of which abuts a seal annular seal 16 provided at the lower end of the body 9 of the pump 8.

Le manchon tubulaire 14 et la collerette 15 du corps de pompe 1 ainsi que la tige creuse 10 et la partie inférieure du corps 9 du piston 8 délimitent ainsi une chambre dose 17 qui est fermée à sa partie supérieure par la paroi annulaire 11 et est maintenue étanche vis-à-vis de la périphérie externe du piston 8 par le joint d'étanchéité annulaire 16.The tubular sleeve 14 and the collar 15 of the pump body 1 as well as the hollow rod 10 and the lower part of the body 9 of the piston 8 thus delimit a dose chamber 17 which is closed at its upper part by the annular wall 11 and is maintained. sealing against the outer periphery of the piston 8 by the annular seal 16.

Selon les figures 1 et 2 le ressort de rappel 5 est monté sur le corps de pompe 1 à l'extérieur de la collerette 15 et est donc sans contact avec la chambre dose 17.According to FIGS. 1 and 2, the return spring 5 is mounted on the pump body 1 outside the collar 15 and is therefore not in contact with the dose chamber 17.

Le corps 9 du piston 8 est par ailleurs équipé à son extrémité supérieure d'un joint d'étanchéité annulaire 18 s'appliquant constamment contre la périphérie de l'embout 6 de façon à garantir l'étanchéité entre cet embout et le piston 8 à ce niveau.The body 9 of the piston 8 is also equipped at its upper end with an annular seal 18 which is constantly applied against the periphery of the nozzle 6 so as to guarantee the seal between this nozzle and the piston 8. this level.

Selon les figures 1 et 2, l'embout médian 6 du poussoir 2 est en outre équipé sur sa périphérie d'un cordon d'étanchéité circulaire 19 qui vient en appui contre la face interne du corps 9 du piston 8 de façon à permettre d'isoler la chambre dose 17 de l'ouverture de liaison 13 d'une façon qui sera décrite plus en détail dans la suite de cet exposé.According to FIGS. 1 and 2, the median end piece 6 of the pusher 2 is further equipped on its periphery with a circular sealing bead 19 which bears against the internal face of the body 9 of the piston 8 so as to allow isolating the dose chamber 17 from the connecting opening 13 in a manner to be described in more detail later in this discussion.

L'embout médian 6 du poussoir 2 est par ailleurs équipé à son extrémité inférieure d'un téton 20 formant siège pour le joint d'étanchéité annulaire 12 équipant la tige creuse 10 du piston 8 de façon à permettre d'isoler la chambre dose 17 de la partie interne du récipient, ce d'une manière qui sera là encore décrite plus en détail dans la suite de cet exposé.The median tip 6 of the pusher 2 is also equipped at its lower end with a seat 20 for the ring seal 12 fitted to the hollow rod 10 of the piston 8 so as to isolate the dose chamber 17 of the inner part of the container, this in a manner which will be described here in more detail later in this presentation.

Selon la figure 1, la paroi annulaire 11 du piston 8 qui ferme la chambre dose 17 à sa partie supérieure est percée d'une ouverture de distribution 21 débouchant dans une rainure de distribution longitudinale 22 ménagée sur la paroi interne du corps 9 du piston 8.According to FIG. 1, the annular wall 11 of the piston 8 which closes the dose chamber 17 at its upper part is pierced with a dispensing opening 21 opening into a longitudinal distribution groove 22 formed on the inner wall of the piston body 9 .

Par ailleurs, et selon les figures 1, 2 et 3 l'ouverture de liaison 13 est reliée à un système tourbillonnaire 23 par un canal circulaire 24 d'où partent des branches rectilignes 25 convergeant vers un canal central 26 pouvant être mis en communication avec l'ouverture d'expulsion 4 comme représenté sur la figure 2, alors que dans la position de repos représentée sur la figure 1, l'ouverture d'expulsion 4 est obturée par le corps 9 du piston 8.Moreover, and according to FIGS. 1, 2 and 3, the connection opening 13 is connected to a vortex system 23 by a circular channel 24 from which rectilinear branches 25 converge towards a central channel 26 that can be put into communication with the expulsion opening 4 as shown in FIG. 2, whereas in the rest position shown in FIG. 1, the expulsion opening 4 is closed by the body 9 of the piston 8.

Le mode de fonctionnement de cette pompe doseuse va maintenant être décrit en référence aux figures 1 et 2.The operating mode of this metering pump will now be described with reference to FIGS. 1 and 2.

Dans la position de repos représentée sur la figure 1, l'extrémité supérieure du piston 8 est située à une distance X de la face supérieure du poussoir 2 et la chambre dose 17 est remplie d'une dose du produit à distribuer.In the rest position shown in Figure 1, the upper end of the piston 8 is located at a distance X from the upper face of the pusher 2 and the dose chamber 17 is filled with a dose of the product to be dispensed.

L'axe du canal médian 26 du système tourbillonnaire 23 est lui aussi situé à une distance X de l'ouverture d'expulsion 4.The axis of the median channel 26 of the vortex system 23 is also located at a distance X from the expulsion opening 4.

Dans cette position, le cordon d'étanchéité circulaire 19 de l'embout médian 6 du poussoir 2 est en appui contre la face interne du corps 9 du piston 8 et la chambre dose 17 est isolée de l'ouverture de liaison 13 et de l'ouverture d'expulsion 4.In this position, the circular sealing bead 19 of the median end piece 6 of the pusher 2 bears against the internal face of the body 9 of the piston 8 and the dose chamber 17 is isolated from the connection opening 13 and the expulsion opening 4.

En revanche, le joint d'étanchéité annulaire 12 de la tige creuse 10 du piston 8 n'est pas en appui contre son siège 20 et la chambre dose 17 est en liaison avec la partie interne du récipient.On the other hand, the annular seal 12 of the hollow rod 10 of the piston 8 does not rest against its seat 20 and the dose chamber 17 is in connection with the internal part of the container.

Si à partir de cette position de repos représentée sur la figure 1, l'utilisateur comprime la face supérieure du poussoir 2 selon la flèche F, ce poussoir se déplace vers le bas de la figure dans le corps de pompe 1 alors que le piston 8 demeure immobile, ce jusqu'à ce que la face supérieure du poussoir 2 vienne en contact avec l'extrémité supérieure du corps 9 du piston 8, c'est-à-dire jusqu'à ce que la distance X entre ces deux éléments devienne nulle.If from this rest position shown in Figure 1, the user compresses the upper face of the pusher 2 according to the arrow F, the pusher moves down the figure in the pump body 1 while the piston 8 remains stationary, until the upper face of the pusher 2 comes into contact with the upper end of the body 9 of the piston 8, that is to say until the distance X between these two elements becomes nothing.

Au cours de ce déplacement, le téton 20 vient en appui contre le joint d'étanchéité annulaire 12 de la tige creuse 10 pour isoler la chambre dose 17 de la partie interne du récipient et, simultanément le cordon d'étanchéité circulaire 19 de l'embout 6 vient se placer en regard de la rainure de distribution 22 du corps 9 du piston 8 pour mettre la chambre dose 17 en communication avec l'ouverture de liaison 13, et l'ouverture d'expulsion 4 vient se situer au droit du canal médian 26 du système tourbillonnaire 23.During this movement, the pin 20 abuts against the annular seal 12 of the hollow rod 10 to isolate the dose chamber 17 from the inner part of the container and simultaneously the circular sealing bead 19 of the tip 6 is placed next to the distribution groove 22 of the body 9 of the piston 8 to put the dose chamber 17 in communication with the connecting opening 13, and the expulsion opening 4 is located at the right of the channel median 26 of the vortex system 23.

La chambre dose 17 se trouve ainsi en communication avec l'extérieur.The dose chamber 17 is thus in communication with the outside.

Selon la figure 2, lorsque à partir de cette mise en contact de l'extrémité supérieure du corps 9 du piston 8 et de la face supérieure du poussoir 2 l'utilisateur continue de comprimer ce poussoir selon la flèche F, le piston 8 est entraîné en translation avec lui et comprime la dose de produit présente dans la chambre dose 17.According to Figure 2, when from this contact of the upper end of the body 9 of the piston 8 and the upper face of the pusher 2 the user continues to compress the pusher according to the arrow F, the piston 8 is driven in translation with him and compresses the dose of product present in the dose chamber 17.

Sous l'action de cette compression, le produit renfermé dans la chambre dose 17 est expulsé vers l'extérieur par le chemin représenté en pointillés et schématisé par les flèches a en passant par l'ouverture de distribution 21 puis par la rainure de distribution 22 et le long de l'embout médian 6 du poussoir 2 pour parvenir dans l'ouverture de liaison 13 puis dans le système tourbillonnaire 23 et enfin dans l'ouverture d'expulsion 4 en passant par le canal médian 26.Under the action of this compression, the product contained in the dose chamber 17 is expelled outwards by the path shown in dotted lines and schematized by the arrows a through the dispensing opening 21 then by the distribution groove 22 and along the median tip 6 of the pusher 2 to reach the connection opening 13 and then in the vortex system 23 and finally in the expulsion opening 4 through the median canal 26.

Cette expulsion se poursuit jusqu'à l'évacuation complète de la chambre dose 17 dans la position de distribution représentée sur la figure 2.This expulsion continues until complete evacuation of the dose chamber 17 in the dispensing position shown in FIG. 2.

Cette position est matérialisée par la mise en butée de l'extrémité inférieure 28 du poussoir 2 contre une surface antagonisme 29 du corps de pompe 1.This position is materialized by the abutment of the lower end 28 of the pusher 2 against an antagonistic surface 29 of the pump body 1.

Lorsque, à partir de cette position de distribution, l'utilisateur cesse de comprimer le poussoir 2 selon la flèche F, le ressort 5 le rappelle automatiquement vers le haut de la figure selon la flèche G.When, from this distribution position, the user stops compressing the pusher 2 according to the arrow F, the spring 5 automatically recalls it towards the top of the figure according to the arrow G.

Pendant une première phase de ce mouvement, compte tenu de la présence du bourrelet de freinage par friction 27, le piston 8 reste immobile, de sorte que le téton 20 du poussoir 2 se dégage du joint d'étanchéité annulaire 12 de la tige creuse 10 pour mettre la chambre dose 17 en communication avec la partie interne du récipient.During a first phase of this movement, taking into account the presence of the friction brake bead 27, the piston 8 remains stationary, so that the nipple 20 of the pusher 2 is disengaged from the annular seal 12 of the hollow rod 10 to put the dose chamber 17 in communication with the inner part of the container.

Simultanément le cordon d'étanchéité circulaire 19 de l'embout 6 se dégage de la rainure de distribution 22 et vient à nouveau en appui contre la face interne du corps 9 du piston 8 pour isoler la chambre dose 17 de l'ouverture de liaison 13.Simultaneously, the circular sealing bead 19 of the nozzle 6 disengages from the distribution groove 22 and rests against the inner face of the body 9 of the piston 8 to isolate the dose chamber 17 from the connection opening 13 .

Le piston 8 demeure ainsi immobile jusqu'à ce qu'un épaulement formant butée 30 prévu sur la face interne du poussoir 2 vienne en appui contre un épaulement formant butée antagoniste 31 prévu sur la face externe du corps 9 du piston 8.The piston 8 thus remains stationary until a shoulder forming a stop 30 provided on the internal face of the pusher 2 bears against a shoulder forming an abutment 31 provided on the external face of the body 9 of the piston 8.

Lors de la mise en butée de ces deux épaulements, l'extrémité supérieure du corps 9 du piston 8 se trouve à nouveau à une distance X de la face supérieure du poussoir 2.During the abutment of these two shoulders, the upper end of the body 9 of the piston 8 is again at a distance X from the upper face of the pusher 2.

A partir de cette mise en butée, le poussoir 2 entraîne le piston 8 solidairement en translation le long du corps de pompe 1.From this abutment, the pusher 2 drives the piston 8 integrally in translation along the pump body 1.

Au cours de ce mouvement, le déplacement du piston 8 par rapport au corps de pompe 1 crée une dépression provoquant l'aspiration du produit renfermé dans le récipient vers la chambre dose 17 selon un schéma représenté en pointillés et schématisé par les flèches b sur la figure 1.During this movement, the displacement of the piston 8 relative to the pump body 1 creates a vacuum causing suction of the product contained in the container to the dose chamber 17 in a diagram shown in dashed lines and schematized by the arrows b on the figure 1.

Le produit aspiré passe ainsi dans le tube plongeur 3 puis à la partie interne du manchon tubulaire 14 du corps de pompe puis à la partie interne de la tige creuse 10 et entre le joint d'étanchéité annulaire 12 et le téton 20 de l'embout 6 du poussoir 2 avant de parvenir enfin dans la chambre dose 17.The sucked product thus passes into the dip tube 3 and then to the inner part of the tubular sleeve 14 of the pump body and then to the internal part of the hollow rod 10 and between the annular seal 12 and the nipple 20 of the tip 6 of the pusher 2 before finally reaching the dose chamber 17.

Celle-ci se remplit ainsi de produit jusqu'à ce que des surfaces antagonistes 33 et 32 du corps de pompe 1 et du poussoir 2 viennent en appui l'une contre l'autre pour se retrouver finalement dans la position de repos représentée sur la figure 1.This is filled with product until the opposing surfaces 33 and 32 of the pump body 1 and the pusher 2 bear against each other to finally find themselves in the rest position shown on the drawing. figure 1.

Selon les figures 4 et 5, la pompe doseuse est également essentiellement constituée par un corps de pompe 101 de forme tubulaire adaptable sur un récipient ainsi que par un poussoir 102 susceptible de coulisser le long de la paroi interne de ce corps de pompe 101 entre une position de repos représentée sur la figure 4 et une position de distribution non représentée.According to FIGS. 4 and 5, the dosing pump is also essentially constituted by a pump body 101 of tubular shape that can be adapted to a receptacle as well as by a pusher 102 that can slide along the inner wall of this pump body 101 between a rest position shown in Figure 4 and a dispensing position not shown.

Selon la figure 5, le poussoir 102 est représenté dans une position intermédiaire entre la position de repos et la position de distribution.According to Figure 5, the pusher 102 is shown in an intermediate position between the rest position and the dispensing position.

Le corps de pompe 101 est équipé d'un tube plongeur 103 permettant l'aspiration du produit contenu dans le récipient et son expulsion vers l'extérieur par une ouverture d'expulsion 104 prévue sur la face latérale du poussoir 102 d'une façon qui sera décrite plus en détail dans la suite de cet exposé.The pump body 101 is equipped with a plunger tube 103 allowing suction of the product contained in the container and its expulsion outwards through an expulsion opening 104 provided on the lateral face of the pusher 102 in a way that will be described in more detail later in this presentation.

Dans l'exemple de configuration représenté sur les figures 4 et 5, le corps de pompe 101 est en outre équipé d'une prise d'air extérieur 140 qui peut éventuellement être supprimée dans certaines configurations.In the configuration example shown in FIGS. 4 and 5, the pump body 101 is furthermore equipped with an external air intake 140 which may optionally be omitted in certain configurations.

Un ressort de rappel 105 est logé entre le corps de pompe 101 et le poussoir 102.A return spring 105 is housed between the pump body 101 and the pusher 102.

Ce ressort 105 rappelle automatiquement le poussoir 102 dans la position de repos représentée sur la figure 4 en l'absence de toute contrainte extérieure s'exerçant sur lui.This spring 105 automatically recalls the pusher 102 in the rest position shown in Figure 4 in the absence of any external stress exerted on him.

A partir de cette position de repos, l'utilisateur peut déplacer le poussoir 102 vers le bas de la figure en direction de la position de distribution en exerçant une pression F sur la face supérieure de celui-ci.From this rest position, the user can move the pusher 102 down the figure towards the dispensing position by exerting a pressure F on the upper face thereof.

Par ailleurs, et selon les figures 4 et 5, le poussoir 102 est muni à sa partie interne d'un logement médian 106 dans lequel est fixée l'extrémité supérieure d'un piston 108 constitué par un corps tubulaire.Furthermore, and according to Figures 4 and 5, the pusher 102 is provided at its inner portion with a median housing 106 in which is fixed the upper end of a piston 108 consisting of a tubular body.

Ce piston 108 est ainsi solidaire du poussoir 102 au cours de son déplacement entre la position de distribution et la position de repos.This piston 108 is thus secured to the pusher 102 during its movement between the dispensing position and the rest position.

Selon les figures 4 et 5, le piston 108 est équipé, à son extrémité inférieure d'un joint d'étanchéité annulaire 109 qui s'appuie constamment contre la face interne du corps de pompe 101.According to FIGS. 4 and 5, the piston 108 is equipped at its lower end with an annular seal 109 which is constantly pressing against the inner face of the pump body 101.

Le piston 108 est en outre équipé, à sa partie supérieure d'une ouverture de liaison 113 communiquant constamment avec l'ouverture d'expulsion 104 du poussoir 102 par l'intermédiaire d'un système tourbillonnaire 123 similaire au système tourbillonnaire 23 équipant la pompe doseuse représentée sur les figures 1 à 3.The piston 108 is furthermore equipped, at its upper part, with a connecting opening 113 communicating constantly with the expulsion opening 104 of the pusher 102 via a vortex system 123 similar to the vortex system 23 equipping the pump. metering device shown in Figures 1 to 3.

Selon les figures 4 et 5, la pompe doseuse comporte également un gicleur 107 constitué par un corps tubulaire essentiellement cylindrique 110 fermé à son extrémité supérieure par une paroi frontale circulaire 111 et ouvert à son extrémité inférieure de façon à pouvoir être mis en communication avec la partie interne du récipient.According to FIGS. 4 and 5, the metering pump also comprises a nozzle 107 constituted by a substantially cylindrical tubular body 110 closed at its upper end by a circular front wall 111 and open at its lower end so as to be in communication with the internal part of the container.

Selon la figure 5, le tube plongeur 103 se prolonge dans le corps de pompe 101 par un manchon tubulaire 114 recevant l'extrémité inférieure 115 du corps tubulaire 110 du gicleur 107 à sa partie interne.According to Figure 5, the plunger tube 103 extends into the pump body 101 by a tubular sleeve 114 receiving the lower end 115 of the tubular body 110 of the nozzle 107 at its inner portion.

Le corps tubulaire 110 du gicleur 107 est équipé à ce niveau d'un bourrelet externe 127 susceptible de frotter contre la paroi interne du manchon tubulaire 114 de façon à freiner le déplacement du gicleur 107 dans le corps de pompe 101.The tubular body 110 of the nozzle 107 is equipped at this level with an external bead 127 capable of rubbing against the inner wall of the tubular sleeve 114 so as to slow the displacement of the nozzle 107 in the pump body 101.

Par ailleurs, et selon les figures 4 et 5, le piston 108 est muni sur sa périphérie interne d'un joint d'étanchéité annulaire 112 qui s'appuie contre le corps 110 du gicleur 107.Moreover, and according to FIGS. 4 and 5, the piston 108 is provided on its inner periphery with an annular seal 112 which bears against the body 110 of the nozzle 107.

Comme représenté sur ces figures, le manchon tubulaire 114, la périphérie du corps de pompe 101, le piston 108 et le corps tubulaire 110 du gicleur 107 délimitent une chambre dose 117.As shown in these figures, the tubular sleeve 114, the periphery of the pump body 101, the piston 108 and the tubular body 110 of the nozzle 107 define a dose chamber 117.

Cette chambre dose 117 est fermée hermétiquement par le joint d'étanchéité annulaire 109 du piston 108 et peut être isolée de la partie interne du récipient ou de l'ouverture de liaison 113 et de l'ouverture d'expulsion 104 d'une façon qui sera décrite plus en détail dans la suite de cet exposé.This dose chamber 117 is hermetically closed by the annular seal 109 of the piston 108 and can be isolated from the inner part of the container or the connecting opening 113 and the expulsion opening 104 in a way that will be described in more detail later in this presentation.

Selon les figures 4 et 5, le ressort de rappel 105 est quant à lui monté à l'extérieur d'une collerette 116 du corps de pompe 101 entourant le manchon tubulaire 114 et est ainsi constamment isolé de la chambre dose 117.According to FIGS. 4 and 5, the return spring 105 is mounted on the outside of a flange 116 of the pump body 101 surrounding the tubular sleeve 114 and is thus constantly isolated from the dose chamber 117.

Le corps 110 du gicleur 107 est par ailleurs équipé d'une part d'une ouverture de passage traversante 121 percée au travers de celui-ci, et d'autre part d'une rainure de distribution longitudinale 122 ménagée sur la face externe du corps de gicleur 110 au même niveau que l'ouverture de passage 121.The body 110 of the nozzle 107 is furthermore equipped on the one hand with a through-passage opening 121 pierced therethrough, and on the other hand with a longitudinal distribution groove 122 formed on the external face of the body. nozzle 110 at the same level as the passage opening 121.

Comme il sera précisé dans la suite de cet exposé, l'ouverture de passage 121 permet de mettre la chambre dose 117 en communication avec la partie interne du récipient alors que la rainure de distribution 122 permet de mettre cette chambre 117 en communication avec l'ouverture de liaison 113 et l'ouverture d'expulsion 104.As will be explained later in this presentation, the passage opening 121 makes it possible to put the dose chamber 117 in communication with the internal part of the receptacle while the dispensing groove 122 makes it possible to put this chamber 117 in communication with the patient. link opening 113 and the expulsion opening 104.

Le mode de fonctionnement de cette pompe doseuse va maintenant être décrit en référence aux figures 4 et 5.The operating mode of this metering pump will now be described with reference to FIGS. 4 and 5.

Dans la position de repos représentée sur la figure 4, la paroi frontale 111 du gicleur 107 est située à une distance X de la face supérieure du poussoir 102 et la chambre dose 117 est remplie d'une dose du produit à distribuer.In the rest position shown in Figure 4, the front wall 111 of the nozzle 107 is located at a distance X from the upper face of the pusher 102 and the dose chamber 117 is filled with a dose of the product to be dispensed.

Dans cette position, le joint d'étanchéité annulaire 112 du piston 108 est en appui contre la périphérie externe du corps 110 du gicleur 107 au-dessus de la rainure de distribution 122 de sorte que la chambre dose 117 soit isolée de l'ouverture de liaison 113 et de l'ouverture d'expulsion 104.In this position, the annular seal 112 of the piston 108 is in abutment against the outer periphery of the body 110 of the nozzle 107 above the dispensing groove 122 so that the dose chamber 117 is isolated from the opening of link 113 and the expulsion opening 104.

En revanche, le joint annulaire 112 n'obture pas l'ouverture de passage 121 et la chambre dose 117 est par suite en communication avec la partie interne du récipient.On the other hand, the annular seal 112 does not close the passage opening 121 and the dose chamber 117 is consequently in communication with the internal part of the container.

Si, à partir de cette position de repos représentée sur la figure 4, l'utilisateur comprime la face supérieure du poussoir 102 selon la flèche F, ce poussoir 102 ainsi que le piston 108 se déplacent vers le bas de la figure dans le corps de pompe 101 alors que le gicleur 107 demeure immobile, ce jusqu'à la position représentée sur la figure 5 dans laquelle la face supérieure du poussoir 102 vient en contact avec la paroi frontale circulaire 111 du gicleur 107, c'est-à-dire jusqu'à ce que la distance X entre ces deux éléments devienne nulle.If, from this rest position shown in FIG. 4, the user compresses the upper face of the pusher 102 according to the arrow F, this pusher 102 as well as the piston 108 move towards the bottom of the figure in the body of pump 101 while the nozzle 107 remains stationary, until the position shown in Figure 5 in which the upper face of the pusher 102 comes into contact with the circular front wall 111 of the nozzle 107, that is to say until the distance X between these two elements becomes zero.

Au cours de ce déplacement, le joint d'étanchéité annulaire 112 vient obturer l'ouverture de passage 121 pour isoler la chambre dose 117 de la partie interne du récipient, et vient simultanément se placer en regard de la rainure de distribution 122. Par suite, la chambre dose est mise en communication avec l'ouverture de liaison 113 et l'ouverture d'expulsion 104.During this movement, the annular seal 112 closes the passage opening 121 to isolate the dose chamber 117 from the inner part of the container, and is simultaneously placed opposite the distribution groove 122. As a result the dose chamber is placed in communication with the connection opening 113 and the expulsion opening 104.

Lorsque, à partir de cette mise en contact de la paroi frontale circulaire 111 du gicleur 107 et de la face supérieure du poussoir 102 l'utilisateur continue de comprimer le poussoir 102 selon la flèche F, le gicleur 107 est entraîné en translation avec le piston 108 et le poussoir 102 et la dose de produit présente dans la chambre dose 117 est progressivement comprimée.When, from this contacting of the circular front wall 111 of the nozzle 107 and the upper face of the pusher 102 the user continues to compress the pusher 102 according to the arrow F, the nozzle 107 is driven in translation with the piston 108 and the pusher 102 and the dose of product present in the dose chamber 117 is gradually compressed.

Selon la figure 5, le produit renfermé dans la chambre dose 117 est ainsi expulsé vers l'extérieur par le chemin schématisé par les flèches c en passant par la rainure de distribution 122, puis autour de la paroi externe du corps 110 du gicleur 107 pour parvenir dans l'ouverture de liaison 113 puis dans le système tourbillonnaire 123 et enfin dans l'ouverture d'expulsion 104.According to FIG. 5, the product contained in the dose chamber 117 is thus expelled outwards by the path schematized by the arrows c passing through the distribution groove 122, then around the outer wall of the body 110 of the nozzle 107 to to reach the connection opening 113 then the vortex system 123 and finally the expulsion opening 104.

Cette expulsion se poursuit jusqu'à ce que le piston 108 vienne en butée contre le corps de pompe 101, c'est-à-dire jusqu'à l'évacuation complète de la chambre dose 117, en position de distribution.This expulsion continues until the piston 108 comes into abutment against the pump body 101, that is to say until the complete evacuation of the dose chamber 117, in dispensing position.

Lorsque à partir de cette position l'utilisateur cesse de comprimer le poussoir 102 selon la flèche F le ressort 105 rappelle automatiquement ce poussoir 101 ainsi que le piston 108 vers le haut de la figure selon la flèche G.When from this position the user stops compressing the pusher 102 according to the arrow F the spring 105 automatically reminds the pusher 101 and the piston 108 upwards of the figure according to the arrow G.

Pendant une première phase de ce déplacement le gicleur 107 reste immobile compte tenu de la présence du bourrelet de friction 127 ; par suite le joint d'étanchéité annulaire 112 se dégage de l'ouverture de passage 121 pour mettre la chambre dose 117 en communication avec la partie interne du récipient.During a first phase of this movement the nozzle 107 remains stationary given the presence of the friction bead 127; as a result the annular seal 112 emerges from the passage opening 121 to bring the dose chamber 117 in communication with the inner part of the container.

Le joint d'étanchéité annulaire 121 vient simultanément en appui contre la périphérie externe du corps 110 du gicleur 107 en se dégageant de la rainure de distribution 122 et isole ainsi la chambre dose 117 de l'ouverture de liaison 113 et de l'ouverture d'expulsion 104.The annular seal 121 simultaneously bears against the outer periphery of the body 110 of the nozzle 107 while disengaging from the dispensing groove 122 and thus isolates the dose chamber 117 from the connection opening 113 and the opening of the expulsion 104.

Le gicleur 107 demeure ainsi immobile jusqu'à ce qu'un épaulement formant butée 130 prévu sur la face interne du piston 108 vienne en appui contre un épaulement formant butée antagonisme 131 prévu sur celui-ci.The nozzle 107 thus remains stationary until a shoulder forming a stop 130 provided on the internal face of the piston 108 bears against an abutment forming abutment shoulder 131 provided thereon.

Lors de la mise en butée de ces deux épaulements, la paroi frontale circulaire 111 du gicleur 107 se trouve à nouveau à une distance X de la face supérieure du poussoir 102, dans la position représentée sur la figure 4.At the abutment of these two shoulders, the circular front wall 111 of the nozzle 107 is again at a distance X from the upper face of the pusher 102, in the position shown in FIG.

A partir de cette position, le poussoir 102 et le piston 108 entraînent le gicleur 107 solidairement en translation le long du corps de pompe 101.From this position, the pusher 102 and the piston 108 drive the nozzle 107 integrally in translation along the pump body 101.

Au cours de ce mouvement, le déplacement du piston 108 par rapport au corps de pompe 101 crée une dépression provoquant l'aspiration du produit renfermé dans le récipient vers la chambre dose 117 selon un chemin représenté en pointillés et schématisé par les flèches d sur la figure 4.During this movement, the displacement of the piston 108 relative to the pump body 101 creates a vacuum causing suction of the product contained in the container to the dose chamber 117 in a path shown in dashed lines and diagrammed by the arrows d on the figure 4.

Le produit aspiré passe ainsi dans le tube plongeur 3 puis à la partie interne du corps 110 du gicleur 107 avant de pénétrer dans la chambre dose 117 par l'ouverture de passage 121.The sucked product thus passes into the dip tube 3 and then to the inner part of the body 110 of the nozzle 107 before entering the dose chamber 117 through the passage opening 121.

Claims (11)

  1. Metering pump which is intended to be mounted on various receptacles, in particular receptacles containing cream-like liquid cosmetic or pharmaceutical products comprising a pump body (1, 101) which can be fitted to the receptacle and which communicates with the inner portion thereof and control means which co-operate with the pump body (1, 101) in order to define a metering chamber (17, 117) and which can be activated from the outer side so as to be able to be moved between a distribution position and a rest position in order to allow a measure of the product to be discharged from the metering chamber (17, 117) outwards via a discharge opening (4, 104), then allow a new measure of product to be transferred from the receptacle to the metering chamber (17, 117) and so forth, the control means being resiliently returned from the distribution position to the rest position with no external stresses being applied thereto, creating a pressure reduction which allows a measure of product to be drawn towards the metering chamber (17, 117),
    which metering pump is characterised in that
    the control means are constituted by:
    - a pushing member (2, 102) which is provided with the discharge opening (4, 104) and which is capable of sliding in the pump body (1, 101),
    - a piston (8, 108) which is substantially constituted by a tubular body which is mounted on the inner portion of the pushing member (2, 102) and which co-operates with the pump body (1, 101) in order to delimit the metering chamber (17, 117),
    - actuation elements (8, 107) which are mounted at the inner portion of the pushing member (2, 102) and which are capable of sliding along the pump body (1, 101) with the pushing member (2, 102) and which co-operate with guiding means which allow the metering chamber (17, 117) to be brought into communication with the discharge opening (4, 104) or with the inner portion of the receptacle, these actuation elements moving into engagement with the pushing member (2, 102) during the movement of the control elements between the rest position and the distribution position and vice-versa,
    - a return spring (5, 105) which is mounted between the pump body (1, 101) and the pushing member (2, 102) outside the metering chamber (17, 117), and
    - means (27, 127) for braking by means of friction the sliding movement of the actuation elements along the pump body (1, 101).
  2. Metering pump according to claim 1,
    characterised in that
    the guiding means comprise a connection opening (13, 113) which extends through the piston body (8, 108) and which is capable of being brought into communication with the metering chamber (17, 117) and with the discharge opening (4, 104).
  3. Metering pump according to claim 2,
    characterised in that
    the connection opening (13, 113) is connected to a vortex system (23, 123) which is provided at the inner portion of the body of the piston (8, 108) and which is capable of co-operating with the discharge opening (4, 104) in order to allow the product to be sprayed outwards.
  4. Metering pump according to any one of claims 1 to 3,
    characterised in that
    the actuation elements are provided, on the outer face thereof, with a shoulder (31, 131) forming a stop which is capable of co-operating with a corresponding shoulder (30, 130) which forms a stop and which is provided on the inner face of the pushing member (2), or with an element (108) which is fixedly joined thereto in order to fixedly join these elements in translation along the pump body (1, 101).
  5. Metering pump according to any one of claims 1 to 4,
    characterised in that
    the actuation elements are constituted by the piston.
  6. Metering pump according to claim 5,
    characterised in that
    the pushing member (2) is provided, at the inner portion thereof, with a substantially cylindrical central end-piece (6) which is surrounded by an annular housing (7) which receives the upper end of the body (9) of the piston (8), this central end-piece (6) being provided, on the one hand, at the periphery thereof with a circular sealing strip (19) which moves into abutment against the inner face of the body (9) of the piston (8) in order to isolate the metering chamber (17) from the connection opening (13) and, on the other hand, at the lower end thereof, with a stud (20) which forms a seat for an annular sealing joint (12) which is provided at the upper end with a hollow central rod (10) which is fixed coaxially to the inner face of the body (9) of the piston (8) in order to isolate the metering chamber (17) from the inner portion of the receptacle.
  7. Metering pump according to claim 6,
    characterised in that
    the metering chamber (17) is delimited at the upper portion thereof by the inner face of the body (9) of the piston (8) and by the outer face of the central rod (10) thereof and is capable of being brought into communication with the connection opening (13) and the discharge opening (4) or with the inner portion of the receptacle via a distribution opening (21) which extends through the upper face thereof and which is connected to a longitudinal distribution groove (22) which is provided on the inner wall of the body of the piston (1).
  8. Metering pump according to any one of claims 5 to 7,
    characterised in that
    the discharge opening (4) is blocked by the body (9) of the piston (8) in the rest position.
  9. Metering pump according to any one of claims 1 to 3,
    characterised in that
    the piston (108) is fixedly joined to the pushing member (102) and the actuation elements are constituted by a nozzle (107) which comprises a tubular body (110) which is closed at the upper end thereof and open at the lower end thereof in order to be able to be placed in communication with the inner portion of the receptacle.
  10. Metering pump according to claim 9,
    characterised in that
    the piston (108) is provided, on the inner face thereof, with an annular sealing joint (112) which moves into abutment against the outer periphery of the body (110) of the nozzle (107) in order to isolate the metering chamber (117) from the connection opening (113) or the inner portion of the receptacle.
  11. Metering pump according to claim 10,
    characterised in that
    the metering chamber (117) is delimited at the upper portion thereof by the inner face of the body of the piston (108) and by the outer face of the body (110) of the nozzle (107) and is capable of being brought into communication, on the one hand, with the inner portion of the receptacle via a passage through-opening (121) which extends through the body (110) of the nozzle (107) and, on the other hand, with the connection opening (113) and the discharge opening (104) via a longitudinal distribution groove (122) which is provided on the outer face of the body (110) of the nozzle (107) at the same level as the passage opening (121).
EP02743333A 2001-06-01 2002-05-30 Dosage pump Expired - Lifetime EP1392583B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0107222 2001-06-01
FR0107222A FR2825348B1 (en) 2001-06-01 2001-06-01 METERING PUMP
PCT/FR2002/001814 WO2002096776A1 (en) 2001-06-01 2002-05-30 Dosage pump

Publications (2)

Publication Number Publication Date
EP1392583A1 EP1392583A1 (en) 2004-03-03
EP1392583B1 true EP1392583B1 (en) 2007-11-07

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ID=8863882

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02743333A Expired - Lifetime EP1392583B1 (en) 2001-06-01 2002-05-30 Dosage pump

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US (1) US7014069B2 (en)
EP (1) EP1392583B1 (en)
AT (1) ATE377565T1 (en)
DE (1) DE60223360T2 (en)
ES (1) ES2296955T3 (en)
FR (1) FR2825348B1 (en)
WO (1) WO2002096776A1 (en)

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ATE377565T1 (en) 2007-11-15
WO2002096776A1 (en) 2002-12-05
DE60223360D1 (en) 2007-12-20
US7014069B2 (en) 2006-03-21
FR2825348A1 (en) 2002-12-06
EP1392583A1 (en) 2004-03-03
ES2296955T3 (en) 2008-05-01
US20040251280A1 (en) 2004-12-16
DE60223360T2 (en) 2008-08-28
FR2825348B1 (en) 2003-08-15

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