EP0487412A1 - Metering valve for liquids contained in a pressureless container - Google Patents

Metering valve for liquids contained in a pressureless container Download PDF

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Publication number
EP0487412A1
EP0487412A1 EP91403120A EP91403120A EP0487412A1 EP 0487412 A1 EP0487412 A1 EP 0487412A1 EP 91403120 A EP91403120 A EP 91403120A EP 91403120 A EP91403120 A EP 91403120A EP 0487412 A1 EP0487412 A1 EP 0487412A1
Authority
EP
European Patent Office
Prior art keywords
valve
container
liquid
piston
axial piston
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.)
Withdrawn
Application number
EP91403120A
Other languages
German (de)
French (fr)
Inventor
Jacques Pozzi
Catherine Suck
Pierre Bret
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.)
Promotion Recherche et Innovation Technologique Ste
Original Assignee
Promotion Recherche et Innovation Technologique Ste
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Promotion Recherche et Innovation Technologique Ste filed Critical Promotion Recherche et Innovation Technologique Ste
Publication of EP0487412A1 publication Critical patent/EP0487412A1/en
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005Components or details
    • B05B11/0027Means for neutralising the actuation of the sprayer ; Means for preventing access to the sprayer actuation means
    • B05B11/0032Manually actuated means located downstream the discharge nozzle for closing or covering it, e.g. shutters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005Components or details
    • B05B11/0037Containers
    • B05B11/0039Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005Components or details
    • B05B11/0037Containers
    • B05B11/0039Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
    • B05B11/00444Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means with provision for filtering or cleaning the air flow drawn into the container
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001Piston pumps
    • B05B11/1023Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042Components or details
    • B05B11/105Sealing arrangements around pump actuating stem

Definitions

  • the invention relates to a metering valve for liquid products, operating as a pump.
  • a double valve system allows the expulsion of the contents of this chamber when the user pushes the pusher - the first lower valve is then closed and the second valve open, then the filling by suction of this chamber when the pusher is released and qu 'it rises under the action of a spring - the first lower valve then being open and the second valve closed.
  • Document EP-0 189 549 provides, in a metering pump, for placing in the container a filter for bacterial germs. But on the one hand such a filter has no action against the oxygen of the ambient air, on the other hand it is arranged inside the container and it can be wetted by the liquid contained in the container .
  • the second valve has a lip of a floating piston displaceable in front of an axial piston hole linked to the pusher, the seal is ensured when the pump is at rest, even if the container is laid down or turned over.
  • the valve When the second valve is constituted by a ball, the valve is not likely to remain open during the operation of filling the chamber. But if the container is lying, the valve opens and no longer seals at the pusher. As a result, the liquid may leak.
  • document FR-2 048 263 has in the pusher, at the level of the pipe, liquid outlet, an additional ball and spring valve, the implementation of which requires a certain number of additional parts, the cost of which is not negligible.
  • a first object of the invention is to provide a metering valve which avoids the risks of deterioration of the liquid product by atmospheric pollution.
  • Another object of the invention is to propose a metering valve which does not exhibit any defect in the metering of the product or in sealing in the event of a change in the position of the container.
  • FIG. 1 shows the body 15 of a rigid container containing the liquid to be dispensed.
  • the neck of this container is capped by a cup 4, with the interposition of a seal 42.
  • the cup 4 has a central passage in which freely slides a substantially cylindrical axial piston 3 and having a bulged part 31 capable of coming in stop under a narrowing 41 of the central passage of the cup 4.
  • the axial piston 3 Near its upper end, the axial piston 3 has an annular widening 32 capable of coming into abutment on the narrowing 41.
  • the axial piston 3 has a central bore 17 opening only at its upper end in the form of a valve seat 20 intended to receive a ball 19 acting as an upper valve, that is to say a second valve for the control of the dose of liquid delivered.
  • the upper end of the axial piston 3 is capped by a pusher 2 having a blind central bore 22 facing the valve seat 20, and a channel 18 for outlet from the liquid to be dispensed.
  • This pusher has a skirt capable of sliding freely in a cylindrical part of the cup 4, or around this cylindrical part.
  • a sheath 16 is snapped onto the cup at the seal 42.
  • This sheath consists of three cylindrical parts and a nozzle, also cylindrical, which are of decreasing diameters.
  • the first part 43 of the sleeve 16 extends a little below the cup 4 and defines between its bottom 44 and the cup 4 a space in which is housed a filter 5 of annular shape.
  • the bottom 44 is pierced with holes 12 which communicate the outside and the inside of the container 15.
  • the second part 45 of the sleeve 16 defines a metering chamber 13.
  • the third part 46 of the sleeve 16 guides a spring 8 and its bottom comprises a valve seat 21 for a ball 9 playing the role of a lower valve, c that is to say a valve for admitting the liquid into the metering chamber 13.
  • the sleeve ends in a nozzle 47 on which is fixed a dip tube 14 whose free end is found at the bottom of container 15.
  • the spring 8 the lower end of which is guided by the sleeve 16, has its upper end applied under the lower end of the axial piston 3. It is compressed when a user presses the plunger 2, and returns the axial piston 3 and pusher 2 up when the pressure on the pusher is released.
  • a diametral hole 6 which passes through the central bore 17 and can thus establish a communication between this bore 17 and the chamber 13.
  • the diametral hole 6 crosses the axial piston 49 of reduced diameter, between the bulged part 31 and a lower annular widening 48 which serves as a support stop for the spring 8.
  • a floating piston 1 which slides on the one hand on the zone 49 of the axial piston 3, on the other hand on the second part 45 of the sleeve 16.
  • the floating piston 1 has a cylindrical ring 50 capable of being applied under the cup 4.
  • the floating piston 1 On the zone 49 of the axial piston, the floating piston 1 carries a lip 7 capable of closing off the two ends of the diametrical hole 6.
  • the operation of the metering valve according to the invention is as follows, starting from the rest position of FIG. 1.
  • the swollen part 31 of the axial piston 3 arrives at the floating piston 1 and drives it downwards, driving the liquid from the chamber 13 through the hole 6, the bore 17 and the channel 18.
  • outside air is admitted into the chamber 13, above the floating piston 1, passing between the skirt of the pusher 2 and the cylindrical part of the cup 4, then between the axial piston 3 and the cup 4.
  • the widening 32 of the axial piston 3 reaches the narrowing 41 of the cup 4, a dose of liquid has been delivered through the channel 18.
  • the ball 19 drops back onto its seat 20.
  • the filter 5 passed through by the air which enters the container can be sterilizing to stop bacteria and keep the product sterile. It can also be designed to capture oxygen from the air in case the liquid product of the container must be protected from oxidation. Finally, it may, in general, be able to stop any external pollution and allow only perfectly pure air to enter the container.
  • This filter can be made of paper, fabric, plastic, a material impregnated with a liquid, and generally, any material capable of stopping the undesirable component (s) contained in the air.
  • FIGS. 4 and 5 there is shown a metering valve according to a second embodiment of the invention.
  • This valve generally has the same elements as the valve described with reference to FIGS. 1 to 3.
  • the neck of the container 115 containing the liquid to be dispensed is capped by the cup 104 with the interposition of an O-ring seal 160.
  • This cup 104 carries on its face external to the container 115 a cylindrical part 140 and on its side facing the inside the container 115 a skirt 141 disposed against the internal face of the neck of said container.
  • the cup 104 also has on its external face a wall 142 forming a housing for the installation of a filter 105. Holes 143 drilled in the cup 104 at the bottom of the housing for the filter 105 allow the communication of the external space in the cup with the inside of the container 115.
  • the cup 104 carries, snapped inside the skirt 141 shaped for this purpose, a sheath 116.
  • this sheath has three cylindrical parts and a nozzle which are of decreasing diameter.
  • the first part 144 is shaped externally to snap into the skirt 141 and internally with a shoulder for the establishment of a plate 150. Holes 148 pass through the first part 144 below said shoulder.
  • the second part 145 of the sleeve 116 defines the metering chamber 113.
  • the third part 146 guides the spring 108 and has at its bottom the lower valve for admitting the liquid into the metering chamber formed by the valve seat 121 and ball 109.
  • the dip tube 114 is fixed inside the end piece 147 present below the lower valve.
  • the plate 150 carried by the first part 144 of the sleeve 116 is crossed axially by a cylindrical end piece 151 disposed in the axis of the cylindrical part 140 of the cup 104.
  • the axial piston 103 is disposed inside said cylindrical part 140 of the cup 104 and said end piece 151 of the plate 150.
  • the axial piston 103 has an annular widening 132 against which an O-ring seal 133 is arranged intended to be pressed against the internal surface of the cylindrical part 140 in order to close the upper end of the cup 104.
  • the axial piston 103 has an extension by which it is fixed by snap-fastening between two axial cylindrical walls 134 and 135 of the pusher 102.
  • the internal cylindrical wall 135 is shaped to form a valve seat 120 intended to receive the ball 119 forming the upper valve or second valve of the metering valve.
  • the plunger 102 has a blind axial bore 122 opposite the valve seat 120 and a channel 118 for output of the liquid to be dispensed.
  • the axial piston 103 In the vicinity of its lower end, the axial piston 103 has a reduced diameter zone 149 arranged between two bulges.
  • a floating piston 101 is mounted on this zone 149 of reduced piston diameter in order to slide on said zone 149 and on the internal face of the second part 145 of the sleeve 116.
  • This floating piston has a cylindrical ring 152 capable of being applied against the lower end of the end piece 151 of the plate 150 and a lip 107 capable of closing off the diametrical hole 106.
  • the spring 108 is applied to the axial piston 103 under the lower shoulder delimiting said zone 149 of reduced diameter.
  • FIGS. 4 and 5 The valve of FIGS. 4 and 5 is completed by a plug 170 held on the pusher by a ring 172 to which it is connected by a link 171.
  • This plug 170 is capable of adapting to the dispensing end piece of the pusher 102 in order to preserve the latter from any pollution when the valve is not used.
  • the plug 170 also closes the outlet channel 118 avoiding defusing the valve between two uses.
  • Figure 5 shows the valve of Figure 4 during liquid distribution.
  • the plug 170 no longer closes the dispensing end piece of the pusher 102 and the latter has been moved downwards.
  • the movement of the pusher 102 downwards drives the axial piston 103 as previously, which in a first step causes the diametrical hole of the lip 107 to exit the floating piston 101 and in a second step drives said floating piston 101 towards the bottom of the room 113.
  • the blind bore 122 comprises a shoulder 123 at a level lower than that where the outlet channel 118 opens.
  • the axial piston 103 is free to go back up in order to return to the rest position of FIG. 4.
  • the ball 109 is lifted from its seat 121 and the liquid in the container 115 is allowed to enter the chamber 113 which creates a vacuum in the container tending to suck outside air through the orifices 148.
  • the filtered outside air which is located above the floating piston 101 then passes into the container 115.
  • the metering valve of FIGS. 4 and 5 has two important advantages over that of the preceding figures: the presence of the O-rings 160 and 133 ensures total tightness; positioning the filter 105 outside the container and the tray 150 in the sheath 116 makes it possible to avoid any contact between the liquid and the filter, which protects the latter and increases its effective life, especially when the liquid is sugar.
  • the valve according to the invention in addition to filtering the outside air, has the advantage of having a system of valves preventing leaks of liquid product when the container is coated, for example. Indeed, with a ball 19, 119 on a valve seat 20, 120 and a floating piston 1, 101 whose lip 7, 107 closes the diametrical hole 6, 106 of the axial piston 3, 103 the risk of seeing the outside air entering through the axial bore 17 is removed.

Abstract

Metering valve for liquid products contained in a pressureless container (15). A filter (5) is provided in the vicinity of the neck of the container (15) in order to purify the exterior air penetrating into the container (15) at each metering. The valve comprises a first, lower valve mechanism (9, 21) for the inlet of the liquid into the metering chamber (13), a second valve mechanism (19, 20) for the control of the metered quantity of liquid supplied and a third valve mechanism (6, 7) for the control of the closing safety of the valve. <IMAGE>

Description

L'invention concerne une valve doseuse pour produits liquides, fonctionnant en pompe.The invention relates to a metering valve for liquid products, operating as a pump.

Le principe des pompes doseuses est bien connu et ces dernières sont utilisées dans différents domaines depuis de nombreuses années.The principle of metering pumps is well known and they have been used in various fields for many years.

Elles se composent d'une chambre cylindrique de volume déterminé et d'un poussoir solidaire d'un piston qui peut se mouvoir à l'intérieur de cette chambre, cet ensemble étant monté sur un récipient contenant le produit que l'on désire distribuer.They consist of a cylindrical chamber of determined volume and a pusher secured to a piston which can move inside this chamber, this assembly being mounted on a container containing the product which it is desired to distribute.

Un système de double clapet permet l'expulsion du contenu de cette chambre lorsque l'utilisateur enfonce le poussoir - le premier clapet inférieur est alors fermé et le deuxième clapet ouvert, puis le remplissage par aspiration de cette chambre lorsque le poussoir est relâché et qu'il remonte sous l'action d'un ressort - le premier clapet inférieur étant alors ouvert et le deuxième clapet fermé.A double valve system allows the expulsion of the contents of this chamber when the user pushes the pusher - the first lower valve is then closed and the second valve open, then the filling by suction of this chamber when the pusher is released and qu 'it rises under the action of a spring - the first lower valve then being open and the second valve closed.

Ces pompes présentent un premier inconvénient lié à la pollution atmosphérique.These pumps have a first drawback linked to atmospheric pollution.

Au fur et à mesure de la distribution du produit, son volume dans le flacon diminue et il se crée dans l'espace libre ainsi formé une dépression qui s'oppose progressivement au remplissage de la chambre.As the product is dispensed, its volume in the bottle decreases and a vacuum is created in the free space thus formed which progressively opposes the filling of the chamber.

Pour compenser ce phénomène il est nécessaire de laisser entrer de l'air dans le flacon.To compensate for this phenomenon, it is necessary to allow air to enter the bottle.

Cette obligation de laisser entrer l'air est un inconvénient majeur dans l'utilisation des pompes, notamment lorsqu'on les utilise pour distribuer des produits sensibles à l'oxygène, aux bactéries, ou d'une façon générale à la pollution extérieure.This obligation to let air in is a major drawback in the use of pumps, especially when they are used to distribute products sensitive to oxygen, bacteria, or in general to external pollution.

C'est le cas pour les produits pharmaceutiques, cosmétiques ou alimentaires.This is the case for pharmaceutical, cosmetic or food products.

Des solutions pour résoudre ce problème ont été proposées et certaines sont utilisées.Solutions to solve this problem have been proposed and some are used.

Le document EP-0 189 549 prévoit, dans une pompe doseuse, de disposer dans le récipient un filtre à germes bactériens. Mais d'une part un tel filtre n'a pas d'action contre l'oxygène de l'air ambiant, d'autre part il est disposé à l'intérieur du récipient et il peut être mouillé par le liquide contenu dans le récipient.Document EP-0 189 549 provides, in a metering pump, for placing in the container a filter for bacterial germs. But on the one hand such a filter has no action against the oxygen of the ambient air, on the other hand it is arranged inside the container and it can be wetted by the liquid contained in the container .

Les pompes doseuses de type connu présentent un deuxième inconvénient lié à la nature du deuxième clapet.Metering pumps of known type have a second drawback linked to the nature of the second valve.

Lorsque le deuxième clapet comporte une lèvre d'un piston flottant déplaçable devant un trou du piston axial lié au poussoir, l'étanchéité est assurée lorsque la pompe est au repos, même si le récipient est couché ou retourné.When the second valve has a lip of a floating piston displaceable in front of an axial piston hole linked to the pusher, the seal is ensured when the pump is at rest, even if the container is laid down or turned over.

Mais si le coulissement relatif du piston flottant et du piston axial se fait mal, les deux pistons commencent à remonter alors que le clapet reste ouvert. L'air extérieur entre alors dans la chambre par le trou du poussoir axial non obstrué par la lèvre du piston flottant. Quand la pompe revient au repos, la chambre se trouve remplie en partie par le liquide à distribuer et en partie par l'air extérieur, et le dosage est faussé. Lors de l'utilisation suivante de la pompe, la dose de produit liquide n'est pas complète. Une pompe de ce type est décrite dans le document US-4 010 874.But if the relative sliding of the floating piston and the axial piston is poor, the two pistons start to rise while the valve remains open. The outside air then enters the chamber through the hole in the axial plunger which is not obstructed by the lip of the floating piston. When the pump returns to idle, the chamber is filled partly with the liquid to be dispensed and partly with outside air, and the dosage is distorted. The next time the pump is used, the dose of liquid product is not complete. A pump of this type is described in document US Pat. No. 4,010,874.

Lorsque le deuxième clapet est constitué par une bille, le clapet ne risque pas de rester ouvert pendant l'opération de remplissage de la chambre. Mais si le récipient est couché, le clapet s'ouvre et n'assure plus l'étanchéité au niveau du poussoir. De ce fait, le liquide peut couler.When the second valve is constituted by a ball, the valve is not likely to remain open during the operation of filling the chamber. But if the container is lying, the valve opens and no longer seals at the pusher. As a result, the liquid may leak.

Pour éviter cet inconvénient, le document FR-2 048 263 dispose dans le poussoir, au niveau de la conduite de sortie du liquide, un clapet supplémentaire à bille et ressort dont la mise en oeuvre impose un certain nombre de pièces supplémentaires dont le coût n'est pas négligeable.To avoid this drawback, document FR-2 048 263 has in the pusher, at the level of the pipe, liquid outlet, an additional ball and spring valve, the implementation of which requires a certain number of additional parts, the cost of which is not negligible.

Un premier but de l'invention est de proposer une valve doseuse qui évite les risques de détérioration du produit Iiquide par la pollution atmosphérique.A first object of the invention is to provide a metering valve which avoids the risks of deterioration of the liquid product by atmospheric pollution.

Un autre but de l'invention est de proposer une valve doseuse quine présente pas de défaut de dosage du produit ou d'étanchéité en cas de changement de position du récipient.Another object of the invention is to propose a metering valve which does not exhibit any defect in the metering of the product or in sealing in the event of a change in the position of the container.

L'invention a pour objet une valve doseuse pour produits liquides contenus dans un récipient sans pression, comportant un piston axial repoussé par un ressort, ledit piston axial présentant un alésage central pour l'acheminement du produit liquide à distribuer jusqu'au canal de sortie porté par un poussoir, ledit piston axial portant un piston flottant coulissant dans une chambre de dosage, ladite chambre de dosage étant munie à sa partie inférieure d'un clapet d'admission du liquide, caractérisée en ce qu'elle comporte :

  • un deuxième clapet disposé à l'extrémité supérieure du piston axial au niveau du poussoir, pour le contrôle de la dose de liquide délivrée, et un troisième clapet, disposé à l'extrémité inférieure du piston axial, et constitué essentiellement par le piston flottant, pour le contrôle de la sécurité de fermeture de la valve.
The subject of the invention is a metering valve for liquid products contained in a pressureless container, comprising an axial piston pushed back by a spring, said axial piston having a central bore for conveying the liquid product to be dispensed up to the outlet channel. carried by a pusher, said axial piston carrying a floating piston sliding in a metering chamber, said metering chamber being provided at its lower part with a liquid inlet valve, characterized in that it comprises:
  • a second valve disposed at the upper end of the axial piston at the level of the pusher, for controlling the dose of liquid delivered, and a third valve, disposed at the lower end of the axial piston, and essentially constituted by the floating piston, for checking the valve closing safety.

Selon d'autres caractéristiques de l'invention ,

  • un filtre est prévu, au voisinage du col du récipient, pour purifier l'air extérieur pénétrant dans le récipient à chaque dosage ;
  • le filtre est disposé à l'extérieur du récipient ;
  • le filtre est disposé à l'intérieur du récipient.
According to other features of the invention,
  • a filter is provided, near the neck of the container, to purify the outside air entering the container at each dosage;
  • the filter is placed outside the container;
  • the filter is placed inside the container.

D'autres caractéristiques ressortent de la description qui suit faite avec référence aux dessins annexés sur lesquels on peut voir :

  • Figure 1 : une vue en coupe d'un premier exemple de réalisation d'une valve doseuse selon l'invention en position de repos ;
  • Figure 2 : une vue en coupe de la valve doseuse de la Fig. 1 en cours de distribution du liquide ;
  • Figure 3 : une vue en coupe de la valve doseuse de la Fig. 1 en cours de remplissage de la chambre de dosage ;
  • Figure 4 : une vue en coupe d'un deuxième exemple de réalisation d'une valve doseuse selon l'invention ;
  • Figure 5 : une vue en coupe de la valve doseuse de la Fig. 4 en cours de distribution du liquide.
Other characteristics appear from the following description made with reference to the accompanying drawings on which we can see:
  • Figure 1: a sectional view of a first embodiment of a metering valve according to the invention in the rest position;
  • Figure 2: a sectional view of the metering valve of FIG. 1 during liquid distribution;
  • Figure 3: a sectional view of the metering valve of FIG. 1 during filling of the metering chamber;
  • Figure 4: a sectional view of a second embodiment of a metering valve according to the invention;
  • Figure 5: a sectional view of the metering valve of FIG. 4 during liquid distribution.

En se reportant à la Fig. 1, on voit le corps 15 d'un récipient rigide contenant le liquide à distribuer. Le col de ce récipient est coiffé par une coupelle 4, avec interposition d'un joint d'étanchéité 42. La coupelle 4 présente un passage central dans lequel coulisse librement un piston axial 3 sensiblement cylindrique et présentant une partie renflée 31 susceptible de venir en butée sous un rétrécissement 41 du passage central de la coupelle 4.Referring to FIG. 1 shows the body 15 of a rigid container containing the liquid to be dispensed. The neck of this container is capped by a cup 4, with the interposition of a seal 42. The cup 4 has a central passage in which freely slides a substantially cylindrical axial piston 3 and having a bulged part 31 capable of coming in stop under a narrowing 41 of the central passage of the cup 4.

Au voisinage de son extrémité supérieure, le piston axial 3 présente un élargissement annulaire 32 susceptible de venir en butée sur le rétrécissement 41.Near its upper end, the axial piston 3 has an annular widening 32 capable of coming into abutment on the narrowing 41.

Le piston axial 3 présente un alésage central 17 débouchant seulement à son extrémité supérieure sous la forme d'un siège de clapet 20 destiné à recevoir une bille 19 jouant le rôle de clapet supérieur, c'est-à-dire de deuxième clapet pour le contrôle de la dose de liquide délivrée.The axial piston 3 has a central bore 17 opening only at its upper end in the form of a valve seat 20 intended to receive a ball 19 acting as an upper valve, that is to say a second valve for the control of the dose of liquid delivered.

L'extrémité supérieure du piston axial 3 est coiffée par un poussoir 2 présentant un alésage central borgne 22 en regard du siège de clapet 20, et un canal 18 de sortie du liquide à distribuer. Ce poussoir présente une jupe susceptible de coulisser librement dans une partie cylindrique de la coupelle 4, ou autour de cette partie cylindrique.The upper end of the axial piston 3 is capped by a pusher 2 having a blind central bore 22 facing the valve seat 20, and a channel 18 for outlet from the liquid to be dispensed. This pusher has a skirt capable of sliding freely in a cylindrical part of the cup 4, or around this cylindrical part.

A l'intérieur du récipient 15, un fourreau 16 est encliqueté sur la coupelle au niveau du joint d'étanchéité 42. Ce fourreau se compose de trois parties cylindriques et d'un embout, cylindrique également, qui sont de diamètres décroissants. La première partie 43 du fourreau 16 s'étend un peu au dessous de la coupelle 4 et définit entre son fond 44 et la coupelle 4 un espace dans lequel est logé un filtre 5 de forme annulaire. Le fond 44 est percé de trous 12 qui font communiquer l'extérieur et l'intérieur du récipient 15.Inside the container 15, a sheath 16 is snapped onto the cup at the seal 42. This sheath consists of three cylindrical parts and a nozzle, also cylindrical, which are of decreasing diameters. The first part 43 of the sleeve 16 extends a little below the cup 4 and defines between its bottom 44 and the cup 4 a space in which is housed a filter 5 of annular shape. The bottom 44 is pierced with holes 12 which communicate the outside and the inside of the container 15.

La deuxième partie 45 du fourreau 16 définit une chambre de dosage 13. La troisième partie 46 du fourreau 16 assure le guidage d'un ressort 8 et son fond comporte un siège de clapet 21 pour une bille 9 jouant le rôle de clapet inférieur, c'est-à-dire de clapet d'admission du liquide dans la chambre de dosage 13. En dessous du siège de clapet 21, le fourreau se termine par un embout 47 sur lequel est fixé un tube plongeur 14 dont l'extrémité libre se trouve au fond du récipient 15.The second part 45 of the sleeve 16 defines a metering chamber 13. The third part 46 of the sleeve 16 guides a spring 8 and its bottom comprises a valve seat 21 for a ball 9 playing the role of a lower valve, c that is to say a valve for admitting the liquid into the metering chamber 13. Below the valve seat 21, the sleeve ends in a nozzle 47 on which is fixed a dip tube 14 whose free end is found at the bottom of container 15.

Le ressort 8, dont l'extrémité inférieure est guidée par le fourreau 16, a son extrémité supérieure appliquée sous l'extrémité inférieure du piston axial 3. Il est comprimé lorsqu'un utilisateur appuie sur le poussoir 2, et renvoie le piston axial 3 et le poussoir 2 vers le haut lorsque la pression sur le poussoir est relâchée.The spring 8, the lower end of which is guided by the sleeve 16, has its upper end applied under the lower end of the axial piston 3. It is compressed when a user presses the plunger 2, and returns the axial piston 3 and pusher 2 up when the pressure on the pusher is released.

Au voisinage de l'extrémité inférieure du piston axial 3 est disposé un trou diamétral 6 qui traverse l'alésage central 17 et peut ainsi établir une communication entre cet alésage 17 et la chambre 13. Le trou diamétral 6 traverse le piston axial dans une zone 49 de diamètre réduit, comprise entre la partie renflée 31 et un élargissement annulaire inférieur 48 qui sert de butée d'appui pour le ressort 8.In the vicinity of the lower end of the axial piston 3 is disposed a diametral hole 6 which passes through the central bore 17 and can thus establish a communication between this bore 17 and the chamber 13. The diametral hole 6 crosses the axial piston 49 of reduced diameter, between the bulged part 31 and a lower annular widening 48 which serves as a support stop for the spring 8.

Sur cette zone 49 de diamètre réduit est monté un piston flottant 1 qui coulisse d'une part sur la zone 49 du piston axial 3, d'autre part sur la deuxième partie 45 du fourreau 16. Le piston flottant 1 présente une bague cylindrique 50 susceptible de s'appliquer sous la coupelle 4. Sur la zone 49 du piston axial, le piston flottant 1 porte une lèvre 7 susceptible d'obturer les deux extrémités du trou diamétral 6.On this zone 49 of reduced diameter is mounted a floating piston 1 which slides on the one hand on the zone 49 of the axial piston 3, on the other hand on the second part 45 of the sleeve 16. The floating piston 1 has a cylindrical ring 50 capable of being applied under the cup 4. On the zone 49 of the axial piston, the floating piston 1 carries a lip 7 capable of closing off the two ends of the diametrical hole 6.

Le fonctionnement de la valve doseuse selon l'invention est le suivant en partant de la position de repos de la fig. 1.The operation of the metering valve according to the invention is as follows, starting from the rest position of FIG. 1.

L'utilisateur appuie sur le poussoir 2 et le piston axial 3 commence à descendre en comprimant le ressort 8, la bille 9 étant appliquée sur son siège 21. Alors que le piston flottant 1 reste immobile, le piston axial 3 descend et le trou diamétral 6 sort de la lèvre 7. Le liquide contenu dans la chambre 13 peut alors passer par le trou diamétral 6 dans l'alésage central 17, puis soulever la bille 19 de son siège 20, passer dans l'alésage borgne 22 du poussoir 2 et de là dans le canal 18 de sortie du liquide.The user presses the pusher 2 and the axial piston 3 begins to descend by compressing the spring 8, the ball 9 being applied to its seat 21. While the floating piston 1 remains stationary, the axial piston 3 descends and the diametral hole 6 comes out of the lip 7. The liquid contained in the chamber 13 can then pass through the diametrical hole 6 in the central bore 17, then lift the ball 19 from its seat 20, pass through the blind bore 22 of the pusher 2 and from there into the liquid outlet channel 18.

La partie renflée 31 du piston axial 3 arrive au piston flottant 1 et l'entraîne vers le bas, chassant le liquide de la chambre 13 par le trou 6, l'alésage 17 et le canal 18. C'est la disposition de la Fig. 2. Pendant la descente du piston flottant 1, l'air extérieur est admis dans la chambre 13, au dessus du piston flottant 1, en passant entre la jupe du poussoir 2 et la partie cylindrique de la coupelle 4, puis entre le piston axial 3 et la coupelle 4. Lorsque l'élargissement 32 du piston axial 3 atteint le rétrécissement 41 de la coupelle 4, une dose de liquide a été délivrée par le canal 18.The swollen part 31 of the axial piston 3 arrives at the floating piston 1 and drives it downwards, driving the liquid from the chamber 13 through the hole 6, the bore 17 and the channel 18. This is the arrangement of FIG . 2. During the descent of the floating piston 1, outside air is admitted into the chamber 13, above the floating piston 1, passing between the skirt of the pusher 2 and the cylindrical part of the cup 4, then between the axial piston 3 and the cup 4. When the widening 32 of the axial piston 3 reaches the narrowing 41 of the cup 4, a dose of liquid has been delivered through the channel 18.

L'utilisateur relâche alors la pression sur le poussoir 2 et le ressort 8 renvoie le piston axial 3 vers le haut.The user then releases the pressure on the pusher 2 and the spring 8 returns the axial piston 3 upwards.

La bille 19 retombe sur son siège 20.The ball 19 drops back onto its seat 20.

La zone de diamètre réduit 49 du piston axial 3 coulisse dans le piston flottant 1 qui reste immobile et le trou diamétral 6 est masqué par la lèvre 7. Il en résulte une dépression dans la chambre 13 et la bille 9 se soulève de son siège 21 pour laisser le liquide contenu dans le récipient 15 remonter par le tube plongeur 14 jusqu'à la chambre 13. Le piston axial 3 continue à remonter et son élargissement annulaire inférieur 48 atteint le bord de la lèvre 7 et entraîne le piston flottant 1 vers le haut, ce qui accentue la dépression dans la chambre 13 et l'appel de liquide par le tube plongeur 14. C'est la disposition de la Fig. 3. Le liquide remontant dans la chambre 13, son niveau dans le récipient 15 diminue, ce qui crée une dépression dans le récipient 15. L'air extérieur qui était dans la chambre 13 au dessus du piston flottant 1 passe alors à travers le filtre 5, puis par les trous 12 d'admission d'air filtré, dans le récipient 15. Ainsi, tant que le piston flottant 1 remonte, la compensation, dans le récipient 15, du volume de liquide remplissant la chambre 13 par de l'air filtré, est assurée. En fin de mouvement de remontée, la partie renflée du piston axial 3 vient en butée sous le rétrécissement 41 de la coupelle, la bague 50 du piston flottant 1 vient également en butée sous la coupelle 4 pour assurer une sorte d'étanchéité, et la bille 9 retombe sur son siège 21.The reduced diameter zone 49 of the axial piston 3 slides in the floating piston 1 which remains stationary and the diametral hole 6 is masked by the lip 7. This results in a depression in the chamber 13 and the ball 9 is lifted from its seat 21 to let the liquid contained in the container 15 go up through the dip tube 14 to the chamber 13. The axial piston 3 continues to go up and its lower annular widening 48 reaches the edge of the lip 7 and drives the floating piston 1 towards the high, which accentuates the depression in the chamber 13 and the call of liquid by the dip tube 14. This is the arrangement of FIG. 3. The liquid rising in the chamber 13, its level in the container 15 decreases, which creates a vacuum in the container 15. The outside air which was in the chamber 13 above the floating piston 1 then passes through the filter 5, then through the holes 12 for the admission of filtered air into the container 15. Thus, as long as the floating piston 1 goes up, compensation, in the container 15, for the volume of liquid filling the chamber 13 with filtered air, is ensured. At the end of the ascent movement, the swollen part of the axial piston 3 comes into abutment under the narrowing 41 of the cup, the ring 50 of the floating piston 1 also comes into abutment under the cup 4 to ensure a sort of seal, and the ball 9 falls back onto its seat 21.

Le filtre 5 traversé par l'air qui entre dans le récipient peut être stérilisant pour arrêter les bactéries et garder le produit stérile. Il peut également être conçu pour capter l'oxygène de l'air dans le cas où le produit liquide du récipient doit être protégé de l'oxydation. Il peut enfin, d'une façon générale, être en mesure d'arrêter toute pollution extérieure et de ne laisser pénétrer dans le récipient que de l'air parfaitement pur.The filter 5 passed through by the air which enters the container can be sterilizing to stop bacteria and keep the product sterile. It can also be designed to capture oxygen from the air in case the liquid product of the container must be protected from oxidation. Finally, it may, in general, be able to stop any external pollution and allow only perfectly pure air to enter the container.

Ce filtre peut être réalisé en papier, en tissu, en matière plastique, en un matériau imprégné d'un liquide, et d'une façon générale, en tout matériau capable d'arrêter le ou les composants indésirables contenus dans l'air.This filter can be made of paper, fabric, plastic, a material impregnated with a liquid, and generally, any material capable of stopping the undesirable component (s) contained in the air.

En se reportant aux figures 4 et 5, l'on voit une valve doseuse suivant une seconde forme de réalisation de l'invention. Cette valve comporte globalement les mêmes éléments que la valve décrite en référence aux figures 1 à 3.Referring to Figures 4 and 5, there is shown a metering valve according to a second embodiment of the invention. This valve generally has the same elements as the valve described with reference to FIGS. 1 to 3.

Le col du récipient 115 contenant le liquide à distribuer est coiffé par la coupelle 104 avec interposition d'un joint d'étanchéité torique 160. Cette coupelle 104 porte sur sa face externe au récipient 115 une partie cylindrique 140 et sur sa face tournée vers l'intérieur du récipient 115 une jupe 141 disposée contre la face interne du col dudit récipient.The neck of the container 115 containing the liquid to be dispensed is capped by the cup 104 with the interposition of an O-ring seal 160. This cup 104 carries on its face external to the container 115 a cylindrical part 140 and on its side facing the inside the container 115 a skirt 141 disposed against the internal face of the neck of said container.

La coupelle 104 présente encore sur sa face externe une paroi 142 formant un logement pour la mise en place d'un filtre 105. Des orifices 143 percés dans la coupelle 104 au fond du logement pour le filtre 105 permettent la communication de l'espace externe à la coupelle avec l'intérieur du récipient 115.The cup 104 also has on its external face a wall 142 forming a housing for the installation of a filter 105. Holes 143 drilled in the cup 104 at the bottom of the housing for the filter 105 allow the communication of the external space in the cup with the inside of the container 115.

La coupelle 104 porte, encliqueté à l'intérieur de la jupe 141 conformée à cet effet, un fourreau 116. Comme dans l'exemple précédent, ce fourreau comporte trois parties cylindriques et un embout qui sont de diamètre décroissant. La première partie 144 est conformée extérieurement pour s'encliqueter dans la jupe 141 et intérieurement avec un épaulement pour la mise en place d'un plateau 150. Des orifices 148 traversent la première partie 144 en dessous dudit épaulement. La deuxième partie 145 du fourreau 116 définit la chambre de dosage 113. La troisième partie 146 assure le guidage du ressort 108 et présente dans son fond le clapet inférieur d'admission du liquide dans la chambre de dosage formé du siège de clapet 121 et de la bille 109.The cup 104 carries, snapped inside the skirt 141 shaped for this purpose, a sheath 116. As in the previous example, this sheath has three cylindrical parts and a nozzle which are of decreasing diameter. The first part 144 is shaped externally to snap into the skirt 141 and internally with a shoulder for the establishment of a plate 150. Holes 148 pass through the first part 144 below said shoulder. The second part 145 of the sleeve 116 defines the metering chamber 113. The third part 146 guides the spring 108 and has at its bottom the lower valve for admitting the liquid into the metering chamber formed by the valve seat 121 and ball 109.

Dans cet exemple de réalisation, le tube plongeur 114 est fixé à l'intérieur de l'embout 147 présent en dessous du clapet inférieur.In this exemplary embodiment, the dip tube 114 is fixed inside the end piece 147 present below the lower valve.

Le plateau 150 porté par la première partie 144 du fourreau 116 est traversé axialement par un embout cylindrique 151 disposé dans l'axe de la partie cylindrique 140 de la coupelle 104.The plate 150 carried by the first part 144 of the sleeve 116 is crossed axially by a cylindrical end piece 151 disposed in the axis of the cylindrical part 140 of the cup 104.

Le piston axial 103 est disposé à l'intérieur de ladite partie cylindrique 140 de la coupelle 104 et dudit embout 151 du plateau 150.The axial piston 103 is disposed inside said cylindrical part 140 of the cup 104 and said end piece 151 of the plate 150.

Le piston axial 103 présente un élargissement annulaire 132 contre lequel est disposé un joint d'étanchéité torique 133 destiné à être en appui contre la surface interne de la partie cylindrique 140 afin de fermer l'extrémité supérieure de la coupelle 104.The axial piston 103 has an annular widening 132 against which an O-ring seal 133 is arranged intended to be pressed against the internal surface of the cylindrical part 140 in order to close the upper end of the cup 104.

Au-dessus de l'élargissement annulaire 132, le piston axial 103 présente un prolongement par lequel il est fixé par encliquetage entre deux parois cylindriques axiales 134 et 135 du poussoir 102. La paroi cylindrique interne 135 est conformée afin de former un siège de clapet 120 destiné à recevoir la bille 119 formant le clapet supérieur ou deuxième clapet de la valve doseuse.Above the annular widening 132, the axial piston 103 has an extension by which it is fixed by snap-fastening between two axial cylindrical walls 134 and 135 of the pusher 102. The internal cylindrical wall 135 is shaped to form a valve seat 120 intended to receive the ball 119 forming the upper valve or second valve of the metering valve.

Le poussoir 102 présente un alésage axial borgne 122 en regard du siège de clapet 120 et un canal 118 de sortie du liquide à distribuer.The plunger 102 has a blind axial bore 122 opposite the valve seat 120 and a channel 118 for output of the liquid to be dispensed.

Au voisinage de son extrémité inférieure, le piston axial 103 présente une zone de diamètre réduit 149 disposée entre deux renflements.In the vicinity of its lower end, the axial piston 103 has a reduced diameter zone 149 arranged between two bulges.

Dans cette zone 149 de diamètre réduit, le piston est traversé par un trou diamétral 106 mettant en communication l'alésage interne 117 dudit piston avec l'extérieur de celui-ci.In this zone 149 of reduced diameter, the piston is crossed by a diametrical hole 106 putting the internal bore 117 of said piston into communication with the outside of the latter.

Un piston flottant 101 est monté sur cette zone 149 de diamètre réduit du piston afin de coulisser sur ladite zone 149 et sur la face interne de la deuxième partie 145 du fourreau 116. Ce piston flottant présente une bague cylindrique 152 susceptible de s'appliquer contre l'extrémité inférieure de l'embout 151 du plateau 150 et une lèvre 107 susceptible d'obturer le trou diamétral 106.A floating piston 101 is mounted on this zone 149 of reduced piston diameter in order to slide on said zone 149 and on the internal face of the second part 145 of the sleeve 116. This floating piston has a cylindrical ring 152 capable of being applied against the lower end of the end piece 151 of the plate 150 and a lip 107 capable of closing off the diametrical hole 106.

Le ressort 108 s'applique sur le piston axial 103 sous l'épaulement inférieur délimitant ladite zone 149 de diamètre réduit.The spring 108 is applied to the axial piston 103 under the lower shoulder delimiting said zone 149 of reduced diameter.

La valve des figures 4 et 5 est complétée par un bouchon 170 maintenu sur le poussoir par une bague 172 à laquelle il est relié par un lien 171.The valve of FIGS. 4 and 5 is completed by a plug 170 held on the pusher by a ring 172 to which it is connected by a link 171.

Ce bouchon 170 est susceptible de s'adapter sur l'embout de distribution du poussoir 102 afin de préserver celui-ci de toute pollution lorsque la valve n'est pas utilisée. Le bouchon 170 assure également une fermeture du canal de sortie 118 évitant le désamorçage de la valve entre deux utilisations.This plug 170 is capable of adapting to the dispensing end piece of the pusher 102 in order to preserve the latter from any pollution when the valve is not used. The plug 170 also closes the outlet channel 118 avoiding defusing the valve between two uses.

La figure 5 représente la valve de la figure 4 en cours de distribution de liquide. Le bouchon 170 ne ferme plus l'embout de distribution du poussoir 102 et ce dernier a été déplacé vers le bas.Figure 5 shows the valve of Figure 4 during liquid distribution. The plug 170 no longer closes the dispensing end piece of the pusher 102 and the latter has been moved downwards.

Le mouvement du poussoir 102 vers le bas entraîne comme précédemment le piston axial 103 ce qui dans un premier temps fait sortir le trou diamétral de la lèvre 107 du piston flottant 101 et dans un deuxième temps entraîne ledit piston flottant 101 en direction du fond de la chambre 113.The movement of the pusher 102 downwards drives the axial piston 103 as previously, which in a first step causes the diametrical hole of the lip 107 to exit the floating piston 101 and in a second step drives said floating piston 101 towards the bottom of the room 113.

L'air extérieur passant par le filtre 105 et les orifices 143, pénètre alors dans la chambre 113 au dessus du piston flottant 101, en circulant entre l'embout 151 et le piston axial 103.The outside air passing through the filter 105 and the orifices 143 then enters the chamber 113 above the floating piston 101, circulating between the endpiece 151 and the axial piston 103.

Le liquide passant de la chambre 113 dans l'alésage axial 117 du piston par le trou diamétral 106 soulève la bille 119 de son siège 120 et sort par le canal de sortie 118. Dans cet exemple de réalisation, l'alésage borgne 122 comporte un épaulement 123 à un niveau inférieur à celui où débouche le canal de sortie 118.The liquid passing from the chamber 113 into the axial bore 117 of the piston through the diametrical hole 106 lifts the ball 119 from its seat 120 and exits through the outlet channel 118. In this embodiment, the blind bore 122 comprises a shoulder 123 at a level lower than that where the outlet channel 118 opens.

Après la distribution du liquide, le piston axial 103 est libre de remonter afin de revenir dans la position de repos de la figure 4.After the liquid has been dispensed, the axial piston 103 is free to go back up in order to return to the rest position of FIG. 4.

Au cours de cette remontée, la bille 109 se soulève de son siège 121 et du liquide du récipient 115 est admis à pénétrer dans la chambre 113 ce qui créé une dépression dans le récipient tendant à aspirer de l'air extérieur par les orifices 148. L'air extérieur filtré qui se trouve au dessus du piston flottant 101 passe alors dans le récipient 115.During this ascent, the ball 109 is lifted from its seat 121 and the liquid in the container 115 is allowed to enter the chamber 113 which creates a vacuum in the container tending to suck outside air through the orifices 148. The filtered outside air which is located above the floating piston 101 then passes into the container 115.

La valve doseuse des figures 4 et 5 présente par rapport à celle des figures précédentes deux avantages importants : la présence des joints toriques 160 et 133 assure une étanchéité totale ; le positionnement du filtre 105 à l'extérieur du récipient et du plateau 150 dans le fourreau 116 permet d'éviter tout contact entre le liquide et le filtre ce qui protège celui-ci et augmente sa durée de vie efficace, spécialement lorsque le liquide est sucré.The metering valve of FIGS. 4 and 5 has two important advantages over that of the preceding figures: the presence of the O-rings 160 and 133 ensures total tightness; positioning the filter 105 outside the container and the tray 150 in the sheath 116 makes it possible to avoid any contact between the liquid and the filter, which protects the latter and increases its effective life, especially when the liquid is sugar.

La valve selon l'invention, en plus du filtrage de l'air extérieur, présente l'avantage d'avoir un système de clapets empêchant les fuites de produit liquide lorsque le récipient est couché par exemple. En effet, avec une bille 19, 119 sur un siège de clapet 20, 120 et un piston flottant 1, 101 dont la lèvre 7, 107 vient obturer le trou diamétral 6, 106 du piston axial 3, 103 le risque de voir l'air extérieur pénétrer par l'alésage axial 17 est écarté.The valve according to the invention, in addition to filtering the outside air, has the advantage of having a system of valves preventing leaks of liquid product when the container is coated, for example. Indeed, with a ball 19, 119 on a valve seat 20, 120 and a floating piston 1, 101 whose lip 7, 107 closes the diametrical hole 6, 106 of the axial piston 3, 103 the risk of seeing the outside air entering through the axial bore 17 is removed.

Claims (4)

1. - Valve doseuse pour produits liquides contenus dans un récipient (15, 115) sans pression, comportant un piston axial (3, 103) repoussé par un ressort (8, 108), ledit. piston axial (3, 103) présentant un alésage central (17, 117) pour l'acheminement du produit liquide à distribuer jusqu'au canal de sortie (18, 118) porté par un poussoir (2, 102), ledit piston axial (3, 103) portant un piston flottant (1, 101) coulissant dans une chambre de dosage (13, 113), ladite chambre de dosage étant munie à sa partie inférieure d'un clapet (9, 21 ; 109, 121) d'admission du liquide, caractérisée en ce qu'elle comporte : - un deuxième clapet (19, 20 ; 119, 120) disposé à l'extrémité supérieure du piston axial (3, 103), au niveau du poussoir (2, 102), pour le contrôle de la dose de liquide délivrée, - et un troisième clapet (6, 7 ; 106, 107), disposé à l'extrémité inférieure du piston axial (3, 103), et constitué essentiellement par le piston flottant (1, 101), pour le contrôle de la sécurité de fermeture de la valve 1. - Dosing valve for liquid products contained in a container (15, 115) without pressure, comprising an axial piston (3, 103) pushed back by a spring (8, 108), said. axial piston (3, 103) having a central bore (17, 117) for conveying the liquid product to be dispensed up to the outlet channel (18, 118) carried by a pusher (2, 102), said axial piston ( 3, 103) carrying a floating piston (1, 101) sliding in a metering chamber (13, 113), said metering chamber being provided at its lower part with a valve (9, 21; 109, 121) of liquid intake, characterized in that it comprises: - a second valve (19, 20; 119, 120) disposed at the upper end of the axial piston (3, 103), at the level of the pusher (2, 102), for controlling the dose of liquid delivered, - And a third valve (6, 7; 106, 107), arranged at the lower end of the axial piston (3, 103), and essentially constituted by the floating piston (1, 101), for controlling the safety of valve closure 2. - Valve doseuse selon la revendication 1, caractérisée en ce que un filtre (5, 105) est prévu, au voisinage du col du récipient (15, 115), pour purifier l'air extérieur pénétrant dans le récipient à chaque dosage. 2. - Metering valve according to claim 1, characterized in that a filter (5, 105) is provided, in the vicinity of the neck of the container (15, 115), to purify the outside air entering the container at each dosage. 3. - Valve doseuse selon la revendication 2, caractérisée en ce que le filtre (105) est disposé à l'extérieur du récipient (115). 3. - Metering valve according to claim 2, characterized in that the filter (105) is arranged outside the container (115). 4. - Valve doseuse selon la revendication 2, caractérisée en ce que le filtre (5) est disposé à l'intérieur du récipient (15). 4. - Metering valve according to claim 2, characterized in that the filter (5) is arranged inside the container (15).
EP91403120A 1990-11-21 1991-11-20 Metering valve for liquids contained in a pressureless container Withdrawn EP0487412A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9014546A FR2669379A1 (en) 1990-11-21 1990-11-21 DOSING PUMP FOR LIQUID PRODUCTS.
FR9014546 1990-11-21

Publications (1)

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EP0487412A1 true EP0487412A1 (en) 1992-05-27

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FR (1) FR2669379A1 (en)

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FR2669379B1 (en) 1994-12-30

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