EP1670698A2 - Metering valve and fluid product dispensing device comprising one such valve - Google Patents

Metering valve and fluid product dispensing device comprising one such valve

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Publication number
EP1670698A2
EP1670698A2 EP04805725A EP04805725A EP1670698A2 EP 1670698 A2 EP1670698 A2 EP 1670698A2 EP 04805725 A EP04805725 A EP 04805725A EP 04805725 A EP04805725 A EP 04805725A EP 1670698 A2 EP1670698 A2 EP 1670698A2
Authority
EP
European Patent Office
Prior art keywords
valve
metering
wall
metering chamber
valve according
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.)
Granted
Application number
EP04805725A
Other languages
German (de)
French (fr)
Other versions
EP1670698B1 (en
Inventor
David Goujon
Christophe Jacuk
Christophe Marie
Frédéric PIROU
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.)
Aptar France SAS
Original Assignee
Valois SAS
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 Valois SAS filed Critical Valois SAS
Publication of EP1670698A2 publication Critical patent/EP1670698A2/en
Application granted granted Critical
Publication of EP1670698B1 publication Critical patent/EP1670698B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/44—Valves specially adapted therefor; Regulating devices
    • B65D83/52—Valves specially adapted therefor; Regulating devices for metering
    • B65D83/54—Metering valves ; Metering valve assemblies

Definitions

  • the present invention relates to a metering valve, and a fluid dispenser device comprising such a valve.
  • Metering valves are well known, and generally comprise a valve body in which a valve slides between a rest position and a dispensing position.
  • the valve has a metering chamber which defines a dose of product dispensed on each actuation.
  • This metering chamber is generally connected to the dispensing orifice of the valve when the latter is in the dispensing position, and fills with the product contained in the reservoir when the valve returns from its dispensing position to its rest position. .
  • the metering chamber is formed by a cylindrical tabular element with which are associated two horizontal annular walls axially delimiting said metering chamber and each having in their center a through hole for the valve. To ensure a tight movement of the valve relative to the metering chamber, these two passage holes are generally associated with seals.
  • a well-known problem with metering valves concerns the reproducibility or repeatability of the dose, that is to say a precise and identical dosage on each actuation.
  • the conventional metering chambers have a drawback in that they define a corner or an angle at the junction of the cylindrical tube and the elements of horizontal annular walls.
  • the product contained in the metering chamber is capable of forming a meniscus at these angles or corners of the metering chamber. This has the effect of retaining propellant and active product at the level of these menisci, and therefore altering the precision of the dosage. Likewise, this type of meniscus promotes sticking of the product on the walls of the chamber, which also has the effect of adversely altering the homogeneity of the dose.
  • a metering valve is actuated, the user presses the valve axially and maintains it in the dispensing position for a limited time.
  • the object of the present invention is to provide a valve for dispensing a fluid product which does not have the abovementioned drawbacks. More particularly, the present invention aims to provide a metering valve for dispensing a fluid product which ensures optimum reproducibility of the dose on each actuation of the valve.
  • the present invention also aims to provide a metering valve for dispensing a fluid product which improves the homogeneity of the metering on each actuation of the valve.
  • Another object of the present invention is to provide a metering valve for dispensing a fluid product which is simple and inexpensive to manufacture and assemble, and of safe and reliable use at each actuation.
  • the present invention therefore relates to a metering valve for dispensing a fluid product, comprising a valve body, a metering chamber and a valve sliding in said valve body for dispensing the product contained in the metering chamber, the wall of said metering chamber being at least partially curved in axial section.
  • said metering chamber has an upper orifice and a lower orifice, said valve passing through said upper and lower orifices, a wall of revolution defining said metering chamber by connecting said upper and lower orifices, said wall of revolution being at least partially curved or rounded so as not to form any angle.
  • said wall of revolution comprises a middle wall part, an upper wall part connecting the middle wall part to said upper orifice and a lower wall part connecting the middle wall part to said lower orifice.
  • said middle wall portion is cylindrical.
  • said upper wall part is rounded, in particular spherical.
  • said lower wall part is rounded, in particular spherical.
  • said metering chamber is formed by two wall elements fixed to one another in a sealed manner.
  • the upper and lower orifices respectively comprise a seal, said wall elements substantially covering said seals to limit the contact surface between said seals and the product contained in said metering chamber, and / or limit the flapping of these seals during actuation.
  • the present invention also relates to a device for dispensing a fluid product comprising a metering valve as described above.
  • a schematic cross-sectional view of a metering valve according to an advantageous embodiment of the present invention. Referring to the single figure, the valve comprises a valve body 10 and a valve 30. A metering chamber 20 is defined in the valve, and the valve 30 slides relative to the valve body 10 between a rest position
  • a dispensing position in which the valve is pressed axially inside the valve body 10.
  • This metering valve is intended to be assembled on a fluid reservoir (not shown ), for example by means of a fixing ring or capsule 60 which may be of any type.
  • the dosing chamber is intended to be assembled on a fluid reservoir (not shown ), for example by means of a fixing ring or capsule 60 which may be of any type.
  • the dosing chamber Conventionally, the dosing chamber
  • the metering chamber 20 is isolated from the tank when the valve 30 is moved to its position of dispensing, in which the interior of the metering chamber 20 is connected to the dispensing orifice 35 of the valve 30.
  • the metering chamber 20 is connected to the reservoir in any known manner, allowing the filling of this metering chamber under the effect of the vacuum created by the distribution of the previous dose, and / or by gravity if said valve is used in the inverted position.
  • the metering chamber 20 is at least partially curved in axial section.
  • axial section is meant a section plane which comprises the central axis X of the valve, as shown in the figure.
  • the metering chamber 20 has a wall of revolution 27 which connects the upper orifice 25 to the lower orifice 26, the valve 30 passing through these lower and upper orifices during its movement between its rest and distribution positions.
  • This wall of revolution 27 is advantageously and at least partially curved or rounded so as to form no angle.
  • curved or rounded is meant that this wall has substantially no edges. or abrupt angle, as would be the case for example on a polygonal surface.
  • the absence of a corner or corner in the dosing chamber makes it possible to avoid the formation of a meniscus, and therefore improves the reproducibility and the homogeneity of the dosing with each actuation of the valve.
  • the wall of revolution 27 has a middle wall portion 22, which can advantageously be cylindrical.
  • This middle wall part 22 is connected to the upper orifice 25 by an upper wall part 21 and to the lower orifice 26 by a lower wall part 23.
  • These upper and / or lower wall parts are preferably rounded or curves, especially spherical or elliptical, in order to avoid any meniscus formation at this level.
  • the metering chamber 20 is in fact formed by two wall elements 28, 29 which are fixed to each other in a sealed manner. Each wall element can therefore be both partially rounded, curved or spherical, and partially cylindrical.
  • This implementation also has an additional advantage, namely that the seals 45, 46 which are associated with the upper and lower orifices 25, 26, and against which the valve 30 slides during its movement, are substantially covered by said curved wall elements 28 and 29, which has the effect of limiting the contact surface between said seals 45, 46 and the fluid product contained in said metering chamber 20.
  • This can have a beneficial effect depending on the nature of the fluid product to distribute, especially when it is a pharmaceutical product.
  • the flapping of the seals is advantageously limited during actuation by the presence of these rounded upper and lower walls.
  • the rounded shape of the metering chamber could be different from that shown, provided that it avoids any meniscus formation, and therefore any presence of a corner, edge or angle likely to favor such creation. meniscus.
  • Other modifications are also possible for a person skilled in the art without departing from the scope of the present invention as defined by the appended claims.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Nozzles (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The invention relates to a metering valve which is used to dispense a fluid product. The inventive valve comprises a valve body (10), a metering chamber (20) and a delivery valve (30) which slides in the valve body (10) in order to dispense the product contained in the metering chamber (20), the wall (27) of said metering chamber (20) having an at least partially-curved axial section.

Description

Valve doseuse et dispositif de distribution de produit fluide comportant une telle valve Metering valve and fluid dispenser device comprising such a valve
La présente invention concerne une valve doseuse, et un dispositif de distribution de produit fluide comportant une telle valve. Les valves doseuses sont bien connues, et comportent généralement un corps de valve dans lequel coulisse une soupape entre une position de repos et une position de distribution. La valve comporte une chambre de dosage qui définit une dose de produit distribuée à chaque actionnement. Cette chambre de dosage est généralement reliée à l'orifice de distribution de la soupape lorsque celle-ci est en position de distribution, et se remplit avec le produit contenu dans le réservoir lorsque la soupape revient de sa position de distribution vers sa position de repos. Généralement, la chambre de dosage est formée par un élément tabulaire cylindrique auquel sont associées deux parois annulaires horizontales délimitant axialement ladite chambre de dosage et comportant chacune en leur centre un trou de passage pour la soupape. Pour assurer un déplacement étanche de la soupape par rapport à la chambre de dosage, on associe généralement ces deux trous de passage à des joints d'étanchéité. Un problème bien connu des valves doseuses concerne la reproductibilité ou répétitivité de la dose, c'est-à-dire un dosage précis et identique à chaque actionnement. Les chambres de dosage classiques présentent un inconvénient en ce qu'elles définissent un coin ou un angle au niveau de la jonction du tube cylindrique et des éléments de parois annulaires horizontaux. Le produit contenu dans la chambre de dosage, généralement un produit fluide comportant un gaz propulseur, est susceptible de former un ménisque au niveau de ces angles ou coins de la chambre de dosage. Ceci a pour effet de retenir du propulseur et du produit actif au niveau de ces ménisques, et donc d'altérer la précision du dosage. De même, ce type de ménisque favorise un collage du produit sur les parois de la chambre, ce qui a également pour effet d'altérer de manière négative l'homogénéité de la dose. En particulier, lorsque l'on actionne une valve doseuse, l'utilisateur appuie axialement sur la soupape et la maintient en position de distribution pendant un temps limité. Si la chambre de dosage présente un ménisque lors de l'actionnement, alors un actionnement qui serait relativement rapide de la soupape ne permettrait pas une distribution de la totalité de la dose contenue dans la chambre de dosage. Dans ce cas, pour améliorer la précision de dosage, il serait nécessaire de maintenir la soupape enfoncée en position de distribution pendant un temps relativement long, typiquement quelques secondes, ce qui serait un inconvénient important. La présente invention a pour but de fournir une valve de distribution de produit fluide qui ne reproduit pas les inconvénients susmentionnés. Plus particulièrement, la présente invention a pour but de fournir une valve doseuse de distribution de produit fluide qui assure une reproductibilité optimale de la dose à chaque actionnement de la valve. La présente invention a également pour objet de fournir une valve doseuse de distribution de produit fluide qui améliore l'homogénéité du dosage à chaque actionnement de la valve. La présente invention a encore pour but de fournir une valve doseuse de distribution de produit fluide qui soit simple et peu coûteuse à fabriquer et à assembler, et d'utilisation sûre et fiable à chaque actionnement. La présente invention a donc pour objet une valve doseuse de distribution de produit fluide, comportant un corps de valve, une chambre de dosage et une soupape coulissant dans ledit corps de valve pour distribuer le produit contenu dans la chambre de dosage, la paroi de ladite chambre de dosage étant au moins partiellement courbe en section axiale. Avantageusement, ladite chambre de dosage comporte un orifice supérieur et un orifice inférieur, ladite soupape traversant lesdits orifices supérieur et inférieur, une paroi de révolution définissant ladite chambre de dosage en reliant lesdits orifices supérieur et inférieur, ladite paroi de révolution étant au moins partiellement courbe ou arrondie de manière à ne former aucun angle. Avantageusement, ladite paroi de révolution comporte une partie de paroi médiane, une partie de paroi supérieure reliant la partie de paroi médiane audit orifice supérieur et une partie de paroi inférieure reliant la partie de paroi médiane audit orifice inférieur. Avantageusement, ladite partie de paroi médiane est cylindrique. Avantageusement, ladite partie de paroi supérieure est arrondie, notamment sphérique. Avantageusement, ladite partie de paroi inférieure est arrondie, notamment sphérique. Avantageusement, ladite chambre de dosage est formée par deux éléments de parois fixés l'un à l'autre de manière étanche. Avantageusement, les orifices supérieur et inférieur comportent respectivement un joint d'étanchéité, lesdits éléments de paroi recouvrant sensiblement lesdits joints pour limiter la surface de contact entre lesdits joints et le produit contenu dans ladite chambre de dosage, et/ ou limiter le battement de ces joints lors de l'actionnement. La présente invention a également pour objet un dispositif de distribution de produit fluide comportant une valve doseuse telle que décrite ci-dessus. D'autres caractéristiques et avantages de la présente invention apparaîtront plus clairement au cours de la description détaillée .suivante d'un mode de réalisation particulier de celle-ci, faite en référence au dessin joint, donné à titre d'exemple non limitatif, et qui représente sur la figure unique, une vue schématique en section transversale d'une valve doseuse selon un mode de réalisation avantageux de la présente invention. En référence à la figure unique, la valve comporte un corps de valve 10 et une soupape 30. Une chambre de dosage 20 est définie dans la valve, et la soupape 30 coulisse par rapport au corps de valve 10 entre une position de reposThe present invention relates to a metering valve, and a fluid dispenser device comprising such a valve. Metering valves are well known, and generally comprise a valve body in which a valve slides between a rest position and a dispensing position. The valve has a metering chamber which defines a dose of product dispensed on each actuation. This metering chamber is generally connected to the dispensing orifice of the valve when the latter is in the dispensing position, and fills with the product contained in the reservoir when the valve returns from its dispensing position to its rest position. . Generally, the metering chamber is formed by a cylindrical tabular element with which are associated two horizontal annular walls axially delimiting said metering chamber and each having in their center a through hole for the valve. To ensure a tight movement of the valve relative to the metering chamber, these two passage holes are generally associated with seals. A well-known problem with metering valves concerns the reproducibility or repeatability of the dose, that is to say a precise and identical dosage on each actuation. The conventional metering chambers have a drawback in that they define a corner or an angle at the junction of the cylindrical tube and the elements of horizontal annular walls. The product contained in the metering chamber, generally a fluid product comprising a propellant gas, is capable of forming a meniscus at these angles or corners of the metering chamber. This has the effect of retaining propellant and active product at the level of these menisci, and therefore altering the precision of the dosage. Likewise, this type of meniscus promotes sticking of the product on the walls of the chamber, which also has the effect of adversely altering the homogeneity of the dose. In particular, when a metering valve is actuated, the user presses the valve axially and maintains it in the dispensing position for a limited time. If the dosing chamber has a meniscus during actuation, then an actuation which would be relatively rapid of the valve would not allow a distribution of the entire dose contained in the metering chamber. In this case, to improve the metering accuracy, it would be necessary to keep the valve pressed in the dispensing position for a relatively long time, typically a few seconds, which would be a major drawback. The object of the present invention is to provide a valve for dispensing a fluid product which does not have the abovementioned drawbacks. More particularly, the present invention aims to provide a metering valve for dispensing a fluid product which ensures optimum reproducibility of the dose on each actuation of the valve. The present invention also aims to provide a metering valve for dispensing a fluid product which improves the homogeneity of the metering on each actuation of the valve. Another object of the present invention is to provide a metering valve for dispensing a fluid product which is simple and inexpensive to manufacture and assemble, and of safe and reliable use at each actuation. The present invention therefore relates to a metering valve for dispensing a fluid product, comprising a valve body, a metering chamber and a valve sliding in said valve body for dispensing the product contained in the metering chamber, the wall of said metering chamber being at least partially curved in axial section. Advantageously, said metering chamber has an upper orifice and a lower orifice, said valve passing through said upper and lower orifices, a wall of revolution defining said metering chamber by connecting said upper and lower orifices, said wall of revolution being at least partially curved or rounded so as not to form any angle. Advantageously, said wall of revolution comprises a middle wall part, an upper wall part connecting the middle wall part to said upper orifice and a lower wall part connecting the middle wall part to said lower orifice. Advantageously, said middle wall portion is cylindrical. Advantageously, said upper wall part is rounded, in particular spherical. Advantageously, said lower wall part is rounded, in particular spherical. Advantageously, said metering chamber is formed by two wall elements fixed to one another in a sealed manner. Advantageously, the upper and lower orifices respectively comprise a seal, said wall elements substantially covering said seals to limit the contact surface between said seals and the product contained in said metering chamber, and / or limit the flapping of these seals during actuation. The present invention also relates to a device for dispensing a fluid product comprising a metering valve as described above. Other characteristics and advantages of the present invention will become more clearly apparent during the detailed description. Following of a particular embodiment thereof, given with reference to the attached drawing, given by way of nonlimiting example, and which shows in the single figure, a schematic cross-sectional view of a metering valve according to an advantageous embodiment of the present invention. Referring to the single figure, the valve comprises a valve body 10 and a valve 30. A metering chamber 20 is defined in the valve, and the valve 30 slides relative to the valve body 10 between a rest position
(représentée sur la figure) et une position de distribution (non représentée), dans laquelle la soupape est enfoncée axialement à l'intérieur du corps de valve 10. Cette valve doseuse est destiné à être assemblée sur un réservoir de produit fluide (non représenté), par exemple au moyen d'une bague ou capsule de fixation 60 qui peut être d'un type quelconque. De manière classique, la chambre de dosage(shown in the figure) and a dispensing position (not shown), in which the valve is pressed axially inside the valve body 10. This metering valve is intended to be assembled on a fluid reservoir (not shown ), for example by means of a fixing ring or capsule 60 which may be of any type. Conventionally, the dosing chamber
20 est isolée du réservoir lorsque la soupape 30 est déplacée vers sa position de distribution, dans laquelle l'intérieur de la chambre de dosage 20 est relié à l'orifice de distribution 35 de la soupape 30. Lorsque l'utilisateur relâche sa pression sur la soupape 30, celle-ci revient automatiquement vers sa position de repos sous l'effet du ressort de rappel 50, et pendant ce retour, la chambre de dosage 20 est reliée au réservoir d'une manière quelconque connue, permettant le remplissage de cette chambre de dosage sous l'effet de la dépression créée par la distribution de la dose précédente, et/ou par gravité si ladite valve est utilisée en position inversée. Selon l'invention, la chambre de dosage 20 est au moins partiellement courbe en section axiale. Par section axiale on entend un plan de section qui comporte l'axe central X de la valve, comme représenté sur la figure. Plus précisément, comme cela est visible sur la figure unique, la chambre de dosage 20 comporte une paroi de révolution 27 qui relie l'orifice supérieur 25 à l'orifice inférieur 26, la soupape 30 traversant ces orifices inférieur et supérieur lors de son déplacement entre ses positions de repos et de distribution. Cette paroi de révolution 27 est avantageusement et au moins partiellement courbe ou arrondie de manière à ne former aucun angle. Par courbe ou arrondie on entend que cette paroi ne comporte sensiblement aucune arête. ou angle abrupte, comme cela serait le cas par exemple sur une surface polygonale. L'absence d'angle ou de coin dans la chambre de dosage permet d'éviter la formation d'un ménisque, et améliore donc la reproductibilité et l'homogénéité du dosage à chaque actionnement de la valve. Avantageusement, la paroi de révolution 27 comporte une partie de paroi médiane 22, qui peut avantageusement être cylindrique. Cette partie de paroi médiane 22 est reliée à l'orifice supérieur 25 par une partie de paroi supérieure 21 et à l'orifice inférieur 26 par une partie de paroi inférieure 23. Ces parties de parois supérieure et/ou inférieure sont de préférence arrondies ou courbes, notamment sphériques ou elliptiques, afin d'éviter toute formation de ménisque à ce niveau. Dans le mode de réalisation représenté sur la figure unique, la chambre de dosage 20 est en fait formée par deux éléments de parois 28, 29 qui sont fixés l'un à l'autre de manière étanche. Chaque élément de paroi peut donc être à la fois partiellement arrondi, courbe ou sphérique, et partiellement cylindrique. Cette mise en œuvre présente en outre un avantage supplémentaire, à savoir que les joints d'étanchéité 45, 46 qui sont associés aux orifices supérieur et inférieur 25, 26, et contre lesquels la soupape 30 coulisse lors de son déplacement, sont sensiblement recouverts par lesdits éléments de parois courbes 28 et 29, ce qui a pour effet de limiter la surface de contact entre lesdits joints 45, 46 et le produit fluide contenu dans ladite chambre de dosage 20. Ceci peut avoir un effet bénéfique selon la nature du produit fluide à distribuer, notamment lorsqu'il s'agit d'un produit pharmaceutique. De plus, le battement des joints d'étanchéité est avantageusement limité lors de l'actionnement par la présence de ces parois supérieure et inférieure arrondies La présente invention a été décrite en référence à un mode de réalisation particulier de celle-ci. Bien entendu, diverses modifications sont envisageables. Par exemple, la structure de la valve, et notamment du corps de valve ou de la soupape pourrait être modifiée. De même, la forme arrondie de la chambre de dosage pourrait être différente de celle représentée, à condition qu'elle évite toute formation de ménisque, et .donc toute présence de coin, d'arête ou d'angle susceptible de favoriser une telle création de ménisque. D'autres modifications sont également envisageables pour l'homme du métier sans sortir du cadre de la présente invention tel que défini par les revendications annexées. 20 is isolated from the tank when the valve 30 is moved to its position of dispensing, in which the interior of the metering chamber 20 is connected to the dispensing orifice 35 of the valve 30. When the user releases his pressure on the valve 30, the latter automatically returns to its rest position under the effect of the return spring 50, and during this return, the metering chamber 20 is connected to the reservoir in any known manner, allowing the filling of this metering chamber under the effect of the vacuum created by the distribution of the previous dose, and / or by gravity if said valve is used in the inverted position. According to the invention, the metering chamber 20 is at least partially curved in axial section. By axial section is meant a section plane which comprises the central axis X of the valve, as shown in the figure. More specifically, as can be seen in the single figure, the metering chamber 20 has a wall of revolution 27 which connects the upper orifice 25 to the lower orifice 26, the valve 30 passing through these lower and upper orifices during its movement between its rest and distribution positions. This wall of revolution 27 is advantageously and at least partially curved or rounded so as to form no angle. By curved or rounded is meant that this wall has substantially no edges. or abrupt angle, as would be the case for example on a polygonal surface. The absence of a corner or corner in the dosing chamber makes it possible to avoid the formation of a meniscus, and therefore improves the reproducibility and the homogeneity of the dosing with each actuation of the valve. Advantageously, the wall of revolution 27 has a middle wall portion 22, which can advantageously be cylindrical. This middle wall part 22 is connected to the upper orifice 25 by an upper wall part 21 and to the lower orifice 26 by a lower wall part 23. These upper and / or lower wall parts are preferably rounded or curves, especially spherical or elliptical, in order to avoid any meniscus formation at this level. In the embodiment shown in the single figure, the metering chamber 20 is in fact formed by two wall elements 28, 29 which are fixed to each other in a sealed manner. Each wall element can therefore be both partially rounded, curved or spherical, and partially cylindrical. This implementation also has an additional advantage, namely that the seals 45, 46 which are associated with the upper and lower orifices 25, 26, and against which the valve 30 slides during its movement, are substantially covered by said curved wall elements 28 and 29, which has the effect of limiting the contact surface between said seals 45, 46 and the fluid product contained in said metering chamber 20. This can have a beneficial effect depending on the nature of the fluid product to distribute, especially when it is a pharmaceutical product. In addition, the flapping of the seals is advantageously limited during actuation by the presence of these rounded upper and lower walls. The present invention has been described with reference to a particular embodiment thereof. Of course, various modifications are possible. For example, the structure of the valve, and in particular of the valve body or of the valve could be modified. Similarly, the rounded shape of the metering chamber could be different from that shown, provided that it avoids any meniscus formation, and therefore any presence of a corner, edge or angle likely to favor such creation. meniscus. Other modifications are also possible for a person skilled in the art without departing from the scope of the present invention as defined by the appended claims.

Claims

Revendications claims
1.- Valve doseuse de distribution de produit fluide, comportant un corps de valve (10), une chambre de dosage (20) et une soupape (30) coulissant dans ledit corps de valve (10) pour distribuer le produit contenu dans la chambre de dosage (20), caractérisée en ce que la paroi (27) de ladite chambre de dosage (20) est au moins partiellement courbe en section axiale. 1.- Dosing valve for dispensing a fluid product, comprising a valve body (10), a metering chamber (20) and a valve (30) sliding in said valve body (10) for dispensing the product contained in the chamber metering unit (20), characterized in that the wall (27) of said metering chamber (20) is at least partially curved in axial section.
2.- Valve doseuse selon la revendication 1, dans laquelle ladite chambre de dosage (20) comporte un orifice supérieur. (25) et un orifice inférieur (26), ladite soupape (30) traversant lesdits orifices supérieur et inférieur (25, 26), une paroi de révolution (27) définissant ladite chambre de dosage (20) en reliant lesdits orifices supérieur et inférieur (25, 26), ladite paroi de révolution (27) étant au moins partiellement courbe ou arrondie de manière à ne former aucun angle. 2. A metering valve according to claim 1, in which said metering chamber (20) has an upper orifice. (25) and a lower orifice (26), said valve (30) passing through said upper and lower orifices (25, 26), a wall of revolution (27) defining said metering chamber (20) by connecting said upper and lower orifices (25, 26), said wall of revolution (27) being at least partially curved or rounded so as to form no angle.
3.- Valve doseuse selon la revendication 2, dans laquelle ladite paroi de révolution (27) comporte une partie de paroi médiane (22), une partie de paroi, supérieure (21) reliant la partie de paroi médiane (22) audit orifice supérieur (25) et une partie de paroi inférieure (23) reliant la partie de paroi médiane (22) audit orifice inférieur (26). 3. A metering valve according to claim 2, in which said wall of revolution (27) comprises a middle wall part (22), an upper wall part (21) connecting the middle wall part (22) to said upper orifice. (25) and a bottom wall portion (23) connecting the middle wall portion (22) to said bottom port (26).
4.- Valve doseuse selon la revendication 3, dans laquelle ladite partie de paroi médiane (22) est cylindrique. 4. A metering valve according to claim 3, wherein said middle wall portion (22) is cylindrical.
5.- Valve doseuse selon la revendication 3 ou 4, dans laquelle ladite partie de paroi supérieure (21) est arrondie, notamment sphérique. 5. A metering valve according to claim 3 or 4, wherein said upper wall part (21) is rounded, in particular spherical.
6.- Valve doseuse selon l'une quelconque des revendications 3 à 5, dans laquelle ladite partie de paroi inférieure (23) est arrondie, notamment sphérique. 6. A metering valve according to any one of claims 3 to 5, in which said lower wall part (23) is rounded, in particular spherical.
7.- Valve doseuse selon l'une quelconque des revendications 2 à 6, dans laquelle ladite chambre de dosage (20) est formée par deux éléments de parois (28, 29) fixés l'un à l'autre de manière étanche. 7. A metering valve according to any one of claims 2 to 6, wherein said metering chamber (20) is formed by two wall elements (28, 29) fixed to one another in leaktight manner.
8.- Valve doseuse selon la revendication 7, dans laquelle les orifices supérieur et inférieur (25, 26) comportent respectivement un joint d'étanchéité (45, 46), lesdits éléments de paroi (28, 29) recouvrant sensiblement lesdits joints (45, 46) pour limiter la surface de contact entre lesdits joints (45, 46) et le produit contenu dans ladite chambre de dosage (20), et/ou limiter le battement de ces joints lors de l'actionnement. 8. A metering valve according to claim 7, in which the upper and lower orifices (25, 26) respectively comprise a seal. seal (45, 46), said wall elements (28, 29) substantially covering said seals (45, 46) to limit the contact surface between said seals (45, 46) and the product contained in said metering chamber (20), and / or limit the flapping of these joints during actuation.
9.- Dispositif de distribution de produit fluide, caractérisé en ce qu'il comporte une valve doseuse selon l'une quelconque des revendications précédentes. 9. A device for dispensing a fluid product, characterized in that it comprises a metering valve according to any one of the preceding claims.
EP04805725A 2003-10-07 2004-10-04 Metering valve and fluid product dispensing device comprising one such valve Expired - Lifetime EP1670698B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0311720A FR2860502B1 (en) 2003-10-07 2003-10-07 DOSING VALVE AND DEVICE FOR DISPENSING FLUID PRODUCT COMPRISING SUCH A VALVE
PCT/FR2004/050482 WO2005032971A2 (en) 2003-10-07 2004-10-04 Metering valve and fluid product dispensing device comprising one such valve

Publications (2)

Publication Number Publication Date
EP1670698A2 true EP1670698A2 (en) 2006-06-21
EP1670698B1 EP1670698B1 (en) 2007-03-21

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EP04805725A Expired - Lifetime EP1670698B1 (en) 2003-10-07 2004-10-04 Metering valve and fluid product dispensing device comprising one such valve

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US (1) US7793807B2 (en)
EP (1) EP1670698B1 (en)
JP (1) JP4464967B2 (en)
CN (1) CN100534875C (en)
DE (1) DE602004005473T2 (en)
FR (1) FR2860502B1 (en)
WO (1) WO2005032971A2 (en)

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US20070145081A1 (en) 2007-06-28
US7793807B2 (en) 2010-09-14
WO2005032971A2 (en) 2005-04-14
EP1670698B1 (en) 2007-03-21
JP4464967B2 (en) 2010-05-19
FR2860502A1 (en) 2005-04-08
DE602004005473D1 (en) 2007-05-03
FR2860502B1 (en) 2007-09-14
CN100534875C (en) 2009-09-02
CN1878705A (en) 2006-12-13
DE602004005473T2 (en) 2007-12-13
JP2007507397A (en) 2007-03-29
WO2005032971A3 (en) 2005-07-14

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