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EP2459466B1 - Valve de distribution de produit fluide - Google Patents

Valve de distribution de produit fluide Download PDF

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Publication number
EP2459466B1
EP2459466B1 EP10752862.2A EP10752862A EP2459466B1 EP 2459466 B1 EP2459466 B1 EP 2459466B1 EP 10752862 A EP10752862 A EP 10752862A EP 2459466 B1 EP2459466 B1 EP 2459466B1
Authority
EP
European Patent Office
Prior art keywords
valve
metering chamber
valve member
gasket
neck
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.)
Active
Application number
EP10752862.2A
Other languages
German (de)
English (en)
Other versions
EP2459466A1 (fr
Inventor
Christophe Jacuk
Yvan Milian
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
Aptar France 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 Aptar France SAS filed Critical Aptar France SAS
Publication of EP2459466A1 publication Critical patent/EP2459466A1/fr
Application granted granted Critical
Publication of EP2459466B1 publication Critical patent/EP2459466B1/fr
Active 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 for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant
    • B65D83/44—Valves specially adapted for the discharge of contents; Regulating devices
    • B65D83/52—Metering valves; Metering devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53313—Means to interrelatedly feed plural work parts from plural sources without manual intervention
    • Y10T29/53322—Means to assemble container
    • Y10T29/53335—Pressurized dispensing container

Definitions

  • the present invention relates to a fluid dispenser valve, and a fluid dispenser device comprising such a valve.
  • Fluid dispensing valves especially dosing valves for dispensing pharmaceutical products in the form of aerosol sprays are well known. They generally comprise a cylindrical valve body defining a metering chamber between two seals, a high seal and a low seal, a valve sliding in a sealed manner in said metering chamber between a rest position and a dispensing position.
  • the valve body is fixed, in particular snapped or crimped into a capsule, said capsule being adapted to then be crimped onto the neck of a container containing the product to be dispensed.
  • a neck seal is interposed between the neck of the container and the capsule to seal at this level.
  • the number of consecutive parts is important, which increases the complexity of manufacture and assembly and therefore the cost of the valve.
  • the assembly of the different valve seals is relatively complicated.
  • the spring of the valve generally metallic, is embedded in the fluid, which depending on the nature of the product may have undesirable effects on said product.
  • the valve bodies generally extend inwardly of the tank on which they are assembled, thus creating a dead volume, particularly for valves used in inverted positions. This dead volume must generally be limited by adding a so-called can end ring, assembled around said valve body. This is yet another piece to manufacture and assemble.
  • the valves are generally formed of two parts assembled into one another, which further complicates the manufacture and assembly of the valve.
  • the document WO 01/66439 discloses a two-piece valve body with a seal interposed between said valve body parts.
  • the documents EP2028132 , EP-1336 822 , FR-2,850,165 , WO 01/79079 and US-3,128,924 describe other devices of the state of the art.
  • the present invention aims to provide a simplified valve that does not reproduce the aforementioned drawbacks.
  • the present invention aims to provide a fluid dispenser valve, having fewer component parts and fewer assembly steps.
  • the present invention also aims to provide a fluid dispenser valve that is simple and inexpensive to manufacture and assemble.
  • the present invention therefore relates to a fluid dispensing valve intended to be mounted on a neck of a reservoir containing fluid, said valve comprising a valve body forming a metering chamber and a movable valve in said chamber. dosing between a resting position and a dispensing position, said dosing chamber having a high seal and a low seal cooperating sealingly with said valve, said valve having a neck seal cooperating sealingly with said valve body and said container neck, said valve body being made in one piece, said neck seal and said bottom seal being overmolded on the one-piece valve body.
  • Said bottom seal forms a lip extending radially inwardly and axially towards the reservoir, and sealingly cooperating with the valve in resting and dispensing positions.
  • said valve is made of a single piece.
  • said neck gasket and said gasket are formed in the same material, in particular an elastomeric thermoplastic.
  • said neck seal and said bottom seal form a single piece.
  • said top seal is also overmoulded on said valve body.
  • said valve is movable in said valve between a rest position, in which the metering chamber is sealed from the tank and the atmosphere and a dispensing position, in which the metering chamber is sealed of the reservoir and connected to the atmosphere via the valve, said valve having a filling position between said resting and dispensing positions, wherein said metering chamber is isolated from the atmosphere and connected to said reservoir, for filling the the dosing chamber.
  • said valve comprises a filling passage connecting said metering chamber to said reservoir in the filling position.
  • the valve is biased towards its rest position by a spring isolated from the fluid in all positions.
  • said valve comprises a central axial channel connected on one side to an outlet orifice and on the other side to a radial channel which opens into the metering chamber in dispensing position, said valve comprising an outer radial shoulder, said spring being disposed around the valve and cooperating with said radial shoulder to bias the valve towards its rest position, said spring being disposed around said radial channel in the rest position.
  • the present invention also relates to a fluid dispenser device comprising a reservoir containing fluid and having a valve as described above.
  • said valve is assembled on the neck of the reservoir by a fixing cap provided with an axial extension defining the opening for passage of the valve, said axial extension receiving the spring of the valve.
  • said valve body is fixed, in particular snapped, inside the fixing cap.
  • the present invention also relates to a method of manufacturing a device as described above, comprising the step of overmolding the bottom seal and the neck seal on the one-piece valve body.
  • said seals are formed from the same thermoplastic elastomer material and overmolded in the same overmolding step.
  • the method further comprises the steps of assembling the valve and the spring in the capsule and then fixing, in particular by snapping, the valve body in said capsule.
  • said top seal is pre-assembled on said valve for assembly.
  • said top seal is pre-assembled on said valve body for assembly.
  • the present invention relates in particular to a metering valve type valve for dispensing aerosol form of a medicinal fluid product, by means of a propellant gas.
  • a metering valve type valve for dispensing aerosol form of a medicinal fluid product, by means of a propellant gas.
  • the present invention can also be applied to valves of another type or used in different fields, such as perfumery or cosmetics.
  • the valve shown on the figure 1 comprises a valve body 10 forming a metering chamber 15.
  • a valve 20 is slidably mounted in the metering chamber 15 between a rest position, shown in FIG. figure 1 , and a dispensing position, in which the valve is pressed axially towards the inside of the valve.
  • the valve 20 is urged toward its rest position by a spring 60, which compresses when a user actuates the valve and urges the valve axially within the valve.
  • the compressed spring 60 returns the valve 20 from its dispensing position to its rest position.
  • the valve comprises a central axial channel 21 opening on one side on an axial outlet 25 and on the other side on a radial channel 22 which opens into the metering chamber 15 when the valve 20 is in the dispensing position.
  • the metering chamber 15 has a high seal 30 and a bottom seal 40 (the terms ā€œupā€ and ā€œdownā€ referring to the upright position of the valve shown in the figure) and the valve 20 slides tightly against these two up and down joints 30, 40.
  • the valve body 10 is assembled on a reservoir 1, in particular on the neck 2 of this reservoir 1, by means of a fixing member 100, which is advantageously a crimping capsule as shown in the figure.
  • a fixing member 100 which is advantageously a crimping capsule as shown in the figure.
  • the fixing member could be of a different type, for example screwed, snap-fastenable or similar.
  • a neck seal 50 is interposed between the valve body 10 and the fixing member 100, which will be hereinafter called the attachment cap for the sake of simplicity of description, said neck seal 50 being intended to seal between the valve body 10 and the neck 2 of the tank 1.
  • the neck seal 50 and the bottom seal 40 of the metering chamber are overmolded onto said valve body 10.
  • these seals are formed of the same material.
  • the seal or seals are advantageously made of olefinic-based elastomeric thermoplastic material (TPE), for example PP / SBC (mixture of polypropylene and styrene block copolymer), POE (ethylene octene), PEB (ethylene butene), EVA (ethylene vinyl acetate), PP / EPDM (blend of polypropylene and ethylene propylene diene monomer).
  • TPE olefinic-based elastomeric thermoplastic material
  • SBC mixture of polypropylene and styrene block copolymer
  • POE ethylene octene
  • PEB ethylene butene
  • EVA ethylene vinyl acetate
  • PP / EPDM blend of polypropylene and ethylene propylene diene monomer
  • the valve body is made of polyolefin, which promotes the overmolding of olefinic-based TPE seals, because of the chemical affinity of these materials.
  • the molding of the polyolefin valve body and the overmolding of olefinically based TPE seals could be carried out in the same mold.
  • Other possible materials for the valve body include polybutylene terephthalate (PBT), polyoxymethylene (POM), polyamide (PA), polycarbonate (PC), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), acrylonitrile butadiene styrene (ABS), polypropylene (PP), polyethylene (PE), and alloys of all these materials.
  • seal (s) include thermoplastic alloys (NBR / PP, butyl / PP, halobutyl / PP, HNBR / PE), thermoplastic elastomers prepared by dynamic vulcanization, thermoplastic polyamide elastomers (PEBA, PEA, PEEA , PCEA), thermoplastic polyether ester elastomers, thermoplastic polyurethane elastomers (TPU), styrene block copolymers (SBS, SIS, SEBS, SEPS, SEEPS, SIBS), and mixtures of all these materials.
  • thermoplastic alloys NBR / PP, butyl / PP, halobutyl / PP, HNBR / PE
  • thermoplastic elastomers prepared by dynamic vulcanization thermoplastic polyamide elastomers (PEBA, PEA, PEEA , PCEA), thermoplastic polyether ester elastomers, thermoplastic polyurethane elastomers (TPU),
  • the neck seal 50 forms a single piece with the bottom seal 40, as visible on the figure 1 .
  • the present invention thus makes it possible to eliminate constituent parts and to simplify the assembly of the valve since, after overmoulding of the seals, the unit formed by the valve body 10 and the seals 30, 40 is fixed in the crimping capsule 100. a single assembly step.
  • this attachment is made by snapping the valve body 10, in particular a radially outer snap-fitting portion 11 of the valve body 10, onto a corresponding snap-fitting shoulder 101 of the attachment cap 100.
  • This shoulder of snap-fastening 101 may for example be made by stamping.
  • the high seal 50 made of elastomer or TPE, can be made in the form of a flat gasket pre-assembled on the valve 20 or on the valve body 10.
  • axial ribs 19 are provided on the portion of the valve body receiving said top seal 50.
  • the top seal 50 could also be overmoulded on the valve body. One could thus form the three seals in one piece integrally molded on the valve body in one overmolding step.
  • the bottom seal 40 is formed of a lip for sealing. This lip extends axially downwards and radially inwards, as visible on the figure 1 and is biased radially against the valve 20. This implementation ensures a good seal.
  • the bottom seal 40 after overmolding on the valve body 10, advantageously at least partially forms the lower edge of said unit formed of the valve body and overmolded joints.
  • the closure of the tank 1 forms a surface that is approximately flat, eliminating or in any case greatly limiting the dead volume of product inside said tank. It is therefore no longer necessary to provide an end ring of the can as for conventional valves.
  • the spring 60 of the valve is completely isolated from the product contained in the reservoir or in the valve, in particular to avoid any interaction between said product and the spring, generally metallic.
  • the capsule 100 may comprise an axial extension 110 intended to accommodate said spring 60.
  • the upper end of this axial extension 110 defines the passage opening of the valve 20.
  • the shoulder 26 of the valve pushed axially upwards by the spring in the rest position, cooperates with this upper end of the axial extension 110 of the capsule to define the rest position of the valve and therefore of the valve.
  • the spring 60 cooperates on one side with a radial shoulder 26 of the valve 20.
  • said shoulder 26 has an axial length large enough to effectively guide the top of the valve during actuation.
  • the spring 60 can rely for example on said high seal 30.
  • This implementation also simplifies the assembly of the valve.
  • the valve 20 is inserted into the capsule 100, with the spring 60 which is placed around said valve 20, in contact with said shoulder 26, then the unit formed by the valve body and the seals is snapped into the capsule 100.
  • the valve is then assembled and ready to be fixed on a tank filled with the fluid to be dispensed.
  • the figure 2 represents another embodiment, in which a pellet or washer 70 is interposed between the seal 30 and the spring 60, in order to avoid potentially negative interactions between the spring and the seal, such as a deformation of said seal.
  • the pellet makes it possible to better distribute the stresses of the spring.
  • This pellet 70 also serves during filling, when the fluid product is injected at high pressure through the valve, which can cause deformation of the seal 30 due to the sudden rise in pressure in the metering chamber 15. The presence of a pellet 70 prevents such deformation.
  • the figure 3 shows another embodiment, in which the valve comprises, between the shoulder 26 and the seal 30, ribs or grooves 27 which, in the actuating position, and thus also in the filling position, are supported by their lower radial front surfaces 28 against the seal 30, in particular to prevent deformation during filling.
  • the valve 20 is made in one piece, and the metering chamber 15 is isolated from the tank by the bottom seal 40, both in the rest position and in the dispensing position. Only when the valve 20 moves between its rest and distribution positions, in a so-called filling position, the metering chamber 15 is connected to the reservoir, to allow its filling.
  • the valve 20 comprises in this respect at least one filling passage 29 which connects the metering chamber 15 to said fluid reservoir, in the filling position of the valve, this filling position being situated between the dispensing position and the position rest. More particularly, the metering chamber 15 is advantageously sealingly closed in the rest position of the valve 20, so that the bottom seal 40 seals the filling passage 29 when the valve 20 is in the rest position.
  • the bottom seal 40 thus cooperates with the valve 20 to seal the filling passage 29 both in the rest position and in the dispensing position of the valve.
  • the filling passage 29 is advantageously made by means of one or more lateral channel (s) formed in the lateral wall of the valve 20.
  • the filling is dependent in particular on the depth and the height of the this filling passage 29.
  • the valve 20 after expulsion of a dose, automatically returns to its rest position under the effect of the spring 60.
  • the bottom seal 40 no longer cooperates sealingly with the valve 20, but is at the side channel (s) (s) formed (s) in said valve 20.
  • the filling will be done more or less quickly, and the amount of the dose to be transferred into the metering chamber 15 determines the dimensions of the passage (s) side (s) 29.
  • the depression created in the metering chamber 15 after the expulsion of the previous dose may be Advance the filling of a new dose when the valve 20 passes through its filling position when moving back to its rest position. At the next actuation, the valve 20 will again pass through its filling position before reaching its dispensing position, so that if the dose was to be incomplete in the metering chamber 15, it would be completed during this actuation . It is obviously preferable to make the channel (s) side (s) (such) so that the filling of the metering chamber 15 is complete and complete, and that ensures a perfect reproducibility of the dose.
  • the figure 4 represents another embodiment outside the scope of the invention, wherein the bottom seal does not isolate the metering chamber 15 in the rest position.
  • the filling passage 29 can be replaced by one or more grooves 19 which allow rapid filling of the metering chamber 15 when the valve is returned to the inverted position when filling the chamber by pressure differential , and a slow emptying when the valve is in the right position of rest of the figure 4 Iso-pressure between the can and the chamber.

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  • 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)
  • Closures For Containers (AREA)
  • Check Valves (AREA)

Description

  • La prĆ©sente invention a pour objet une valve de distribution de produit fluide, ainsi qu'un dispositif de distribution de produit fluide comportant une telle valve.
  • Les valves de distribution de produit fluide, notamment les valves doseuses pour distribuer des produits pharmaceutiques sous forme de sprays aĆ©rosols sont bien connues. Elles comportent gĆ©nĆ©ralement un corps de valve cylindrique dĆ©finissant une chambre de dosage entre deux joints, un joint haut et un joint bas, une soupape coulissant de maniĆØre Ć©tanche dans ladite chambre de dosage entre une position de repos et une position de distribution. Le corps de valve est fixĆ©, notamment encliquetĆ© ou serti dans une capsule, ladite capsule Ć©tant adaptĆ© Ć  ensuite ĆŖtre sertie sur le col d'un rĆ©cipient contenant le produit Ć  distribuer. Un joint de col est interposĆ© entre le col du rĆ©cipient et la capsule pour assurer l'Ć©tanchĆ©itĆ© Ć  ce niveau. Ce type de valve fonctionne de maniĆØre satisfaisante, mais prĆ©sente un certain nombre d'inconvĆ©nients. Ainsi, le nombre de piĆØces consĆ©cutives est important, ce qui augmente la complexitĆ© de fabrication et d'assemblage et donc le coĆ»t de la valve. En particulier l'assemblage des diffĆ©rents joints de valve est relativement compliquĆ©. Par ailleurs, le ressort de la valve, gĆ©nĆ©ralement mĆ©tallique, est noyĆ© dans le produit fluide, ce qui selon la nature du produit peut avoir des effets indĆ©sirables sur ledit produit. De plus, les corps de valve s'Ć©tendent gĆ©nĆ©ralement vers l'intĆ©rieur du rĆ©servoir sur lequel ils sont assemblĆ©s, crĆ©ant ainsi un volume mort, en particulier pour les valves utilisĆ©es en position inversĆ©es. Ce volume mort doit gĆ©nĆ©ralement ĆŖtre limitĆ© en ajoutant une bague dite fin de bidon, assemblĆ©e autour dudit corps de valve. Il s'agit lĆ  encore d'une piĆØce supplĆ©mentaire Ć  fabriquer et Ć  assembler. De mĆŖme, les soupapes sont gĆ©nĆ©ralement formĆ©es de deux piĆØces assemblĆ©es l'une dans l'autre, ce qui complique encore davantage la fabrication et l'assemblage de la valve.
  • Le document WO 01/66439 dĆ©crit un corps de valve en deux parties, avec un joint intercalĆ© entre lesdites parties de corps de valve. Les documents EP2028132 , EP-1336 822 , FR-2 850 165 , WO 01/79079 et US-3 128 924 dĆ©crivent d'autres dispositifs de l'Ć©tat de la technique.
  • La prĆ©sente invention a pour but de fournir une valve simplifiĆ©e qui ne reproduit pas les inconvĆ©nients susmentionnĆ©s.
  • En particulier, la prĆ©sente invention a pour but de fournir une valve de distribution de produit fluide, comportant moins de piĆØces constitutives et moins d'Ć©tapes d'assemblage.
  • La prĆ©sente invention a Ć©galement pour but de fournir une valve de distribution de produit fluide qui soit simple et peu coĆ»teuse Ć  fabriquer et Ć  assembler.
  • La prĆ©sente invention a donc pour objet une valve de distribution de produit fluide destinĆ©e Ć  ĆŖtre montĆ©e sur un col d'un rĆ©servoir contenant du produit fluide, ladite valve comportant un corps de valve formant une chambre de dosage et une soupape mobile dans ladite chambre de dosage entre une position de repos et une position de distribution, ladite chambre de dosage comportant un joint haut et un joint bas coopĆ©rant de maniĆØre Ć©tanche avec ladite soupape, ladite valve comportant un joint de col coopĆ©rant de maniĆØre Ć©tanche avec ledit corps de valve et ledit col de rĆ©cipient, ledit corps de valve Ć©tant rĆ©alisĆ© d'une seule piĆØce monobloc, ledit joint de col et ledit joint bas Ć©tant surmoulĆ©s sur le corps de valve monobloc. Ledit joint bas forme une lĆØvre s'Ć©tendant radialement vers l'intĆ©rieur et axialement vers le rĆ©servoir, et coopĆ©rant de maniĆØre Ć©tanche avec la soupape en positions de repos et de distribution.
  • Avantageusement, ladite soupape est rĆ©alisĆ©e d'une piĆØce monobloc.
  • Avantageusement, ledit joint de col et ledit joint sont formĆ©s dans le mĆŖme matĆ©riau, notamment un thermoplastique Ć©lastomĆØre.
  • Avantageusement, ledit joint de col et ledit joint bas forment une piĆØce monobloc.
  • Avantageusement, ledit joint haut est Ć©galement surmoulĆ© sur ledit corps de valve.
  • Avantageusement, ladite soupape est dĆ©plaƧable dans ladite valve entre une position de repos, dans laquelle la chambre de dosage est isolĆ©e de maniĆØre Ć©tanche du rĆ©servoir et de l'atmosphĆØre et une position de distribution, dans laquelle la chambre de dosage est isolĆ©e de maniĆØre Ć©tanche du rĆ©servoir et reliĆ© Ć  l'atmosphĆØre via la soupape, ladite soupape comportant une position de remplissage entre lesdites positions de repos et de distribution, dans laquelle ladite chambre de dosage est isolĆ©e de l'atmosphĆØre et reliĆ©e audit rĆ©servoir, pour rĆ©aliser le remplissage de la chambre de dosage.
  • Avantageusement, ladite soupape comporte un passage de remplissage reliant ladite chambre de dosage audit rĆ©servoir en position de remplissage.
  • Avantageusement, la soupape est sollicitĆ©e vers sa position de repos par un ressort isolĆ© du produit fluide en toutes positions.
  • Avantageusement, ladite soupape comporte un canal axial central reliĆ© d'un cotĆ© Ć  un orifice de sortie et de l'autre cotĆ© Ć  un canal radial qui dĆ©bouche dans la chambre de dosage en position de distribution, ladite soupape comportant un Ć©paulement radial externe, ledit ressort Ć©tant disposĆ© autour de la soupape et coopĆ©rant avec ledit Ć©paulement radial pour solliciter la soupape vers sa position de repos, ledit ressort Ć©tant disposĆ© autour dudit canal radial en position de repos.
  • La prĆ©sente invention a aussi pour objet un dispositif de distribution de produit fluide, comportant un rĆ©servoir contenant du produit fluide, et comportant une valve telle que dĆ©crite ci-dessus.
  • Avantageusement, ladite valve est assemblĆ©e sur le col du rĆ©servoir par une capsule de fixation pourvue d'une extension axiale dĆ©finissant l'ouverture de passage de la soupape, ladite extension axiale recevant le ressort de la valve.
  • Avantageusement, ledit corps de valve est fixĆ©, notamment encliquetĆ©, Ć  l'intĆ©rieur de la capsule de fixation.
  • La prĆ©sente invention a aussi pour objet un procĆ©dĆ© de fabrication d'un dispositif tel que dĆ©crit ci-dessus, comprenant l'Ć©tape de surmouler le joint bas et le joint de col sur le corps de valve monobloc.
  • Avantageusement, lesdits joints sont formĆ©s Ć  partir du mĆŖme matĆ©riau thermoplastique Ć©lastomĆØre et surmoulĆ©s en une mĆŖme Ć©tape de surmoulage.
  • Avantageusement, le procĆ©dĆ© comprend en outre les Ć©tapes d'assembler la soupape et le ressort dans la capsule puis de fixer, notamment par encliquetage, le corps de valve dans ladite capsule.
  • Avantageusement, ledit joint haut est prĆ©-assemblĆ© sur ladite soupape pour l'assemblage.
  • En variante, ledit joint haut est prĆ©-assemblĆ© sur ledit corps de valve pour l'assemblage.
  • Ces caractĆ©ristiques et avantages et d'autres de la prĆ©sente invention apparaĆ®tront plus clairement au cours de la description dĆ©taillĆ©e suivante de celle-ci, faite en rĆ©fĆ©rence aux dessins joints, donnĆ©s Ć  titre d'exemples non limitatifs, et sur lesquels
    • la figure 1 est une vue schĆ©matique en section reprĆ©sentant une valve selon un premier mode de rĆ©alisation avantageux de la prĆ©sente invention, en position de repos,
    • la figure 2 est une vue similaire Ć  celle de la figure 1, reprĆ©sentant un second mode de rĆ©alisation avantageux de la prĆ©sente invention,
    • la figure 3 est une vue similaire Ć  celle de la figure 1, reprĆ©sentant un troisiĆØme mode de rĆ©alisation avantageux de la prĆ©sente invention, et
    • la figure 4 est une vue similaire Ć  celle de la figure 1, reprĆ©sentant un quatriĆØme mode de rĆ©alisation en dehors du pĆ©rimĆØtre de la prĆ©sente invention,
  • En se rĆ©fĆ©rant notamment Ć  la figure 1, la prĆ©sente invention concerne en particulier une valve de type valve doseuse pour la distribution sous forme aĆ©rosol d'un produit fluide mĆ©dicamenteux, au moyen d'un gaz propulseur. Bien entendu, la prĆ©sente invention peut Ć©galement s'appliquer Ć  des valves d'un autre type ou utilisĆ©es dans des domaines diffĆ©rents, tel que la parfumerie ou la cosmĆ©tique.
  • La valve reprĆ©sentĆ©e sur la figure 1 comporte un corps de valve 10 formant une chambre de dosage 15. Une soupape 20 est montĆ©e coulissante dans la chambre de dosage 15 entre une position de repos, reprĆ©sentĆ©e sur la figure 1, et une position de distribution, dans laquelle la soupape est enfoncĆ©e axialement vers l'intĆ©rieur de la valve. La soupape 20 est sollicitĆ©e vers sa position de repos par un ressort 60, qui se comprime lorsqu'un utilisateur actionne la valve et pousse la soupape axialement Ć  l'intĆ©rieur de la valve. Lorsque l'utilisateur relĆ¢che sa force d'actionnement, le ressort 60 comprimĆ© ramĆØne la soupape 20 de sa position de distribution vers sa position de repos. La soupape comporte un canal axial central 21 dĆ©bouchant d'un cotĆ© sur un orifice de sortie axiale 25 et de l'autre cotĆ© sur un canal radial 22 qui dĆ©bouche dans la chambre de dosage 15 lorsque la soupape 20 est en position de distribution. La chambre de dosage 15 comporte un joint haut 30 et un joint bas 40 (les expressions Ā« haut Ā» et Ā« bas Ā» faisant rĆ©fĆ©rence Ć  la position droite de la valve reprĆ©sentĆ©e sur la figure) et la soupape 20 coulisse de maniĆØre Ć©tanche contre ces deux joints haut et bas 30, 40.
  • Le corps de valve 10 est assemblĆ© sur un rĆ©servoir 1, en particulier sur le col 2 de ce rĆ©servoir 1, au moyen d'un organe de fixation 100, qui est avantageusement une capsule Ć  sertir comme reprĆ©sentĆ©e sur la figure. Il est Ć  noter ici que l'organe de fixation pourrait ĆŖtre d'un type diffĆ©rent, par exemple vissable, encliquetable ou similaire. Un joint de col 50 est interposĆ© entre le corps de valve 10 et l'organe de fixation 100, qui sera ci-aprĆØs appelĆ© capsule de fixation pour des raisons de simplicitĆ© de description, ledit joint de col 50 Ć©tant destinĆ© Ć  assurer l'Ć©tanchĆ©itĆ© entre le corps de valve 10 et le col 2 du rĆ©servoir 1.
  • Le joint de col 50 et le joint bas 40 de la chambre de dosage sont surmoulĆ©s sur ledit corps de valve 10. Avantageusement, ces joints sont formĆ©s du mĆŖme matĆ©riau. Le ou les joints sont avantageusement rĆ©alisĆ©s en matĆ©riau thermoplastique Ć©lastomĆØre (TPE) Ć  base olĆ©finique, par exemple en PP/SBC (mĆ©lange de polypropylĆØne et de copolymĆØre Ć  blocs styrĆØne), POE (Ć©thylĆØne octĆØne), PEB (Ć©thylĆØne butĆØne), EVA (Ć©thylĆØne vinyle acĆ©tate), PP/EPDM (mĆ©lange de polypropylĆØne et d'Ć©thylĆØne propylĆØne diĆØne monomĆØre). Les joints sont surmoulĆ©s sur le corps de valve 10, avantageusement en une mĆŖme Ć©tape de surmoulage. Le corps de valve 10 est rĆ©alisĆ© d'une seule piĆØce monobloc, ce qui simplifie sa fabrication et son assemblage. Avantageusement, le corps de valve est rĆ©alisĆ© en polyolĆ©fine, ce qui favorise le surmoulage des joints en TPE Ć  base olĆ©finique, du fait de l'affinitĆ© chimique de ces matĆ©riaux. Avantageusement, le moulage du corps de valve en polyolĆ©fine et le surmoulage des joints en TPE Ć  base olĆ©finique pourraient ĆŖtre effectuĆ©s dans le mĆŖme moule. D'autres matĆ©riaux possibles pour le corps de valve comprennent le polybutylĆØne tĆ©rĆ©phtalate (PBT), polyoxymĆ©thylĆØne (POM), polyamide (PA), polycarbonate (PC), polymĆ©thacrylate de mĆ©thyle (PMMA), polychlorure de vinyle (PVC), acrylonitrile butadiĆØne styrĆØne (ABS), polypropylĆØne (PP), polyĆ©thylĆØne (PE), et des alliages de tous ces matĆ©riaux. D'autres matĆ©riaux possibles pour le ou les joints comprennent les alliages thermoplastiques (NBR/PP, butyl/PP, halobutyl/PP, HNBR/PE), les Ć©lastomĆØres thermoplastiques prĆ©parĆ©s par vulcanisation dynamique, les Ć©lastomĆØres thermoplastiques polyamide (PEBA, PEA, PEEA, PCEA), les Ć©lastomĆØres thermoplastiques polyĆ©ther ester, les Ć©lastomĆØres thermoplastiques polyurĆ©thane (TPU), les copolymĆØres Ć  blocs styrĆØne (SBS, SIS, SEBS, SEPS, SEEPS, SIBS), et des mĆ©langes de tous ces matĆ©riaux.
  • Avantageusement, le joint de col 50 forme une seule piĆØce monobloc avec le joint bas 40, comme visible sur la figure 1. La prĆ©sente invention permet donc de supprimer des piĆØces constitutives et de simplifier l'assemblage de la valve puisque aprĆØs surmoulage des joints, l'unitĆ© formĆ©e par le corps de valve 10 et les joints 30, 40 se fixe dans la capsule de sertissage 100 en une seule Ć©tape d'assemblage. Avantageusement, cette fixation est rĆ©alisĆ©e par encliquetage du corps de valve 10, notamment d'une partie d'encliquetage 11 radialement externe du corps de valve 10, sur un Ć©paulement d'encliquetage correspondant 101 de la capsule de fixation 100. Cet Ć©paulement d'encliquetage 101 peut par exemple ĆŖtre rĆ©alisĆ© par emboutissage. Le joint haut 50, rĆ©alisĆ© en Ć©lastomĆØre ou en TPE, peut ĆŖtre rĆ©alisĆ© sous la forme d'un joint plat prĆ©-assemblĆ© sur la soupape 20 ou sur le corps de valve 10. Avantageusement dans ce cas, des nervures axiales 19 sont prĆ©vues sur la partie du corps de valve recevant ledit joint haut 50. En variante, le joint haut 50 pourrait aussi ĆŖtre surmoulĆ© sur le corps de valve. On pourrait ainsi former les trois joints en une seule piĆØce monobloc surmoulĆ©e sur le corps de valve en une mĆŖme Ć©tape de surmoulage.
  • Le joint bas 40 est formĆ© d'une lĆØvre pour rĆ©aliser l'Ć©tanchĆ©itĆ©. Cette lĆØvre s'Ć©tend axialement vers le bas et radialement vers l'intĆ©rieur, comme visible sur la figure 1, et est sollicitĆ©e radialement contre la soupape 20. Cette mise en oeuvre garantit une bonne Ć©tanchĆ©itĆ©. De plus, le joint bas 40, aprĆØs surmoulage sur le corps de valve 10, forme avantageusement au moins partiellement le bord infĆ©rieur de ladite unitĆ© formĆ©e du corps de valve et des joints surmoulĆ©s. Ainsi, la fermeture du rĆ©servoir 1 forme une surface environ plane, Ć©liminant ou en tous cas limitant fortement le volume mort de produit Ć  l'intĆ©rieur dudit rĆ©servoir. Il n'est donc plus nĆ©cessaire de prĆ©voir une bague fin de bidon comme pour les valves classiques.
  • Selon un autre aspect de l'invention, le ressort 60 de la valve est totalement isolĆ© du produit contenu dans le rĆ©servoir ou dans la valve, notamment pour Ć©viter toute interaction entre ledit produit et le ressort, gĆ©nĆ©ralement mĆ©tallique. Ainsi, comme visible sur la figure 1, la capsule 100 peut comporter une extension axiale 110 destinĆ©e Ć  loger ledit ressort 60. L'extrĆ©mitĆ© supĆ©rieure de cette extension axiale 110 dĆ©finit l'ouverture de passage de la soupape 20. L'Ć©paulement 26 de la soupape, poussĆ© axialement vers le haut par le ressort en position de repos, coopĆØre avec cette extrĆ©mitĆ© supĆ©rieure de l'extension axiale 110 de la capsule pour dĆ©finir la position de repos de la soupape et donc de la valve. Le ressort 60 coopĆØre d'un cotĆ© avec un Ć©paulement radial 26 de la soupape 20. Avantageusement, ledit Ć©paulement 26 prĆ©sente une longueur axiale assez importante pour efficacement guider le haut de soupape lors de l'actionnement. De l'autre cotĆ©, le ressort 60 peut s'appuyer par exemple sur ledit joint haut 30. Cette mise en oeuvre simplifie aussi l'assemblage de la valve. Ainsi, la soupape 20 est insĆ©rĆ©e dans la capsule 100, avec le ressort 60 qui est mis en place autour de ladite soupape 20, en contact avec ledit Ć©paulement 26, puis l'unitĆ© formĆ©e par le corps de valve et les joints est encliquetĆ©e dans la capsule 100. La valve est alors assemblĆ©e et prĆŖte Ć  ĆŖtre fixĆ©e sur un rĆ©servoir remplie du produit fluide Ć  distribuer.
  • La figure 2 reprĆ©sente un autre mode de rĆ©alisation, dans lequel une pastille ou rondelle 70 est interposĆ©e entre le joint 30 et le ressort 60, afin d'Ć©viter des interactions potentiellement nĆ©gatives entre le ressort et le joint, telle qu'une dĆ©formation dudit joint. La pastille permet de mieux rĆ©partir les contraintes du ressort. Cette pastille 70 sert aussi lors du remplissage, lorsque le produit fluide est injectĆ© Ć  haute pression Ć  travers la soupape, ce qui peut provoquer une dĆ©formation du joint 30 en raison de la brusque Ć©lĆ©vation de pression dans la chambre de dosage 15. La prĆ©sence d'une pastille 70 empĆŖche une telle dĆ©formation.
  • La figure 3 montre une autre variante de rĆ©alisation, dans laquelle la soupape comporte, entre l'Ć©paulement 26 et le joint 30, des nervures ou cannelures 27 qui, en position d'actionnement, et donc aussi en position de remplissage, viennent s'appuyer par leurs surfaces radiales frontales infĆ©rieures 28 contre le joint 30, pour notamment Ć©viter sa dĆ©formation lors du remplissage.
  • Selon encore un autre aspect avantageux, la soupape 20 est rĆ©alisĆ©e d'une seule piĆØce monobloc, et la chambre de dosage 15 est isolĆ©e du rĆ©servoir par le joint bas 40, Ć  la fois en position de repos et en position de distribution. Ce n'est que lorsque la soupape 20 se dĆ©place entre ses positions de repos et de distribution, dans une position dite de remplissage, que la chambre de dosage 15 est reliĆ©e au rĆ©servoir, pour permettre son remplissage. La soupape 20 comporte Ć  cet Ć©gard au moins un passage de remplissage 29 qui relie la chambre de dosage 15 audit rĆ©servoir de produit fluide, dans la position de remplissage de la soupape, cette position de remplissage Ć©tant situĆ©e entre la position de distribution et la position de repos. Plus particuliĆØrement, la chambre de dosage 15 est avantageusement obturĆ©e de maniĆØre Ć©tanche en position de repos de la soupape 20, de sorte que le joint bas 40 ferme de maniĆØre Ć©tanche le passage de remplissage 29 lorsque la soupape 20 est en position de repos. Il n'y a donc aucun risque de perte de produit contenu dans la chambre de dosage 15 lorsque la soupape est en position de repos, la chambre de dosage 15 Ć©tant totalement isolĆ©e. Le joint bas 40 coopĆØre donc avec la soupape 20 pour obturer de maniĆØre Ć©tanche le passage de remplissage 29 Ć  la fois en position de repos et en position de distribution de la soupape.
  • Le passage de remplissage 29 est avantageusement rĆ©alisĆ© au moyen d'un ou de plusieurs canal(aux) latĆ©ral(aux) formĆ©(s) dans la paroi latĆ©rale de la soupape 20. Le remplissage est dĆ©pendant notamment de la profondeur et de la hauteur de ce passage de remplissage 29. En effet, la soupape 20, aprĆØs expulsion d'une dose, revient automatiquement vers sa position de repos sous l'effet du ressort 60. Lorsque la soupape 20 arrive dans la position de remplissage, le joint bas 40 ne coopĆØre plus de maniĆØre Ć©tanche avec la soupape 20, mais se trouve au niveau du ou des canal(aux) latĆ©ral(aux) mĆ©nagĆ©(s) dans ladite soupape 20. Selon les dimensions et la profondeur de ce passage, ainsi que leur nombre, le remplissage se fera plus ou moins rapidement, et la quantitĆ© de la dose Ć  transfĆ©rer dans la chambre de dosage 15 conditionne les dimensions du ou des passage(s) latĆ©ral(aux) 29. La dĆ©pression crĆ©Ć©e dans la chambre de dosage 15 aprĆØs l'expulsion de la dose prĆ©cĆ©dente peut favoriser le remplissage d'une nouvelle dose lorsque la soupape 20 passe par sa position de remplissage lors de son dĆ©placement en retour vers sa position de repos. Lors de l'actionnement suivant, la soupape 20 passera Ć  nouveau par sa position de remplissage avant d'atteindre sa position de distribution, de sorte que si la dose devait ĆŖtre incomplĆØte dans la chambre de dosage 15, elle serait complĆ©tĆ©e lors de cet actionnement. Il est Ć©videmment prĆ©fĆ©rable de rĆ©aliser le ou les canal(aux) latĆ©ral(aux) de telle sorte que le remplissage de la chambre de dosage 15 se fasse de maniĆØre totale et complĆØte, et qu'on assure ainsi une parfaite reproductibilitĆ© de la dose.
  • La figure 4 reprĆ©sente un autre mode de rĆ©alisation en dehors du pĆ©rimĆØtre de l'invention, dans lequel le joint bas n'isole pas la chambre de dosage 15 en position de repos. Dans ce cas, le passage de remplissage 29 peut ĆŖtre remplacĆ© par une ou plusieurs rainure(s) 19 qui permettent un remplissage rapide de la chambre de dosage 15 lorsque la valve est retournĆ©e en position inversĆ©e lors du remplissage de la chambre par diffĆ©rentiel de pression, et un vidage lent lorsque la valve est en position droite de repos de la figure 4 Ć  iso-pression entre le bidon et la chambre.
  • Bien que la prĆ©sente invention ait Ć©tĆ© dĆ©crite en rĆ©fĆ©rence Ć  plusieurs modes de rĆ©alisation distincts, il est entendu que les diverses caractĆ©ristiques reprĆ©sentĆ©es sur les diffĆ©rentes figures pourraient ĆŖtre combinĆ©es d'une maniĆØre quelconque entre elles. De mĆŖme, certains aspects dĆ©crits ci-dessus pourraient ĆŖtre mis en oeuvre de maniĆØre indĆ©pendante. Par exemple, l'isolation totale du ressort de rappel du produit fluide pourrait ĆŖtre envisagĆ©e avec les joints de col, joint haut et joint bas rĆ©alisĆ©s diffĆ©remment. De mĆŖme, la lĆØvre d'Ć©tanchĆ©itĆ© formant le joint bas pourrait aussi ĆŖtre rĆ©alisĆ©e indĆ©pendamment du joint haut et du joint de col, et indĆ©pendamment du surmoulage.
  • Par ailleurs, l'homme du mĆ©tier peut apporter toutes modifications utiles sans sortir du cadre de la prĆ©sente invention tel que dĆ©fini par les revendications annexĆ©es.

Claims (17)

  1. Valve de distribution de produit fluide destinĆ©e Ć  ĆŖtre montĆ©e sur un col (2) d'un rĆ©servoir (1) contenant du produit fluide, ladite valve comportant un corps de valve (10) formant une chambre de dosage (15) et une soupape (20) mobile dans ladite chambre de dosage (15) entre une position de repos et une position de distribution, ladite chambre de dosage (15) comportant un joint haut (30) et un joint bas (40) coopĆ©rant de maniĆØre Ć©tanche avec ladite soupape (20), ladite valve comportant un joint de col (50) coopĆ©rant de maniĆØre Ć©tanche avec ledit corps de valve (10) et ledit col de rĆ©cipient (2). Telle que ledit corps de valve est rĆ©alisĆ© d'une seule piĆØce monobloc, caractĆ©risĆ©e en ce que ledit joint de col (50) et ledit joint bas (40) sont surmoulĆ©s sur le corps de valve monobloc (10), ledit joint bas (40) formant une lĆØvre s'Ć©tendant radialement vers l'intĆ©rieur et axialement vers le rĆ©servoir, et coopĆ©rant de maniĆØre Ć©tanche avec la soupape (20) en positions de repos et de distribution.
  2. Valve selon la revendication 1, dans laquelle ledit joint de col (50) et ledit joint bas (40) sont formĆ©s dans le mĆŖme matĆ©riau, notamment un thermoplastique Ć©lastomĆØre.
  3. Valve selon la revendication 1 ou 2, dans laquelle ledit joint de col (50) et ledit joint bas (40) forment une piĆØce monobloc.
  4. Valve selon l'une quelconque des revendications prƩcƩdentes, dans laquelle ledit joint haut (50) est Ʃgalement surmoulƩ sur ledit corps de valve (10).
  5. Valve selon l'une quelconque des revendications prĆ©cĆ©dentes, dans laquelle ladite soupape (20) est rĆ©alisĆ©e d'une piĆØce monobloc.
  6. Valve selon l'une quelconque des revendications prĆ©cĆ©dentes, dans laquelle ladite soupape (20) est dĆ©plaƧable dans ladite valve entre une position de repos, dans laquelle la chambre de dosage (15) est isolĆ©e de maniĆØre Ć©tanche du rĆ©servoir (1) et de l'atmosphĆØre et une position de distribution, dans laquelle la chambre de dosage est isolĆ©e de maniĆØre Ć©tanche du rĆ©servoir et reliĆ© Ć  l'atmosphĆØre via la soupape (20), ladite soupape (20) comportant une position de remplissage entre lesdites positions de repos et de distribution, dans laquelle ladite chambre de dosage (15) est isolĆ©e de l'atmosphĆØre et reliĆ©e audit rĆ©servoir (1), pour rĆ©aliser le remplissage de la chambre de dosage (15).
  7. Valve selon la revendication 6, dans laquelle ladite soupape (20) comporte un passage de remplissage (29) reliant ladite chambre de dosage (15) audit rƩservoir (1) en position de remplissage.
  8. Valve selon l'une quelconque des revendications prƩcƩdentes, dans laquelle la soupape (20) est sollicitƩe vers sa position de repos par un ressort (60) isolƩ du produit fluide en toutes positions.
  9. Valve selon la revendication 8, dans laquelle ladite soupape (20) comporte un canal axial central (21) reliƩ d'un cotƩ Ơ un orifice de sortie (25) et de l'autre cotƩ Ơ un canal radial (22) qui dƩbouche dans la chambre de dosage (15) en position de distribution, ladite soupape comportant un Ʃpaulement radial externe (26), ledit ressort (60) Ʃtant disposƩ autour de la soupape (20) et coopƩrant avec ledit Ʃpaulement radial (26) pour solliciter la soupape (20) vers sa position de repos, ledit ressort (60) Ʃtant disposƩ autour dudit canal radial (22) en position de repos.
  10. Dispositif de distribution de produit fluide, comportant un rƩservoir (1) contenant du produit fluide, caractƩrisƩ en ce qu'il comporte une valve selon l'une quelconque des revendications prƩcƩdentes.
  11. Dispositif selon la revendication 10, dans lequel ladite valve est assemblƩe sur le col (2) du rƩservoir (1) par une capsule de fixation (100) pourvue d'une extension axiale (110) dƩfinissant l'ouverture de passage de la soupape (20), ladite extension axiale (110) recevant le ressort (60) de la valve.
  12. Dispositif selon la revendication 10 ou 11, dans lequel ledit corps de valve (10) est fixƩ, notamment encliquetƩ, Ơ l'intƩrieur de la capsule de fixation (100).
  13. ProcƩdƩ de fabrication d'un dispositif selon l'une quelconque des revendications 10 Ơ 12, caractƩrisƩ en ce qu'il comprend l'Ʃtape de surmouler le joint bas (40) et le joint de col (50) sur le corps de valve monobloc (10).
  14. ProcĆ©dĆ© selon la revendication 13, dans lequel lesdits joints (30, 40) sont formĆ©s Ć  partir du mĆŖme matĆ©riau thermoplastique Ć©lastomĆØre et surmoulĆ©s en une mĆŖme Ć©tape de surmoulage.
  15. ProcƩdƩ selon la revendication 13 ou 14, comprenant en outre les Ʃtapes d'assembler la soupape (20) et le ressort (60) dans la capsule puis de fixer, notamment par encliquetage, le corps de valve (10) dans ladite capsule.
  16. ProcƩdƩ selon la revendication 15, dans lequel ledit joint haut (50) est prƩ-assemblƩ sur ladite soupape (20) pour l'assemblage.
  17. ProcƩdƩ selon la revendication 15, dans lequel ledit joint haut (50) est prƩ-assemblƩ sur ledit corps de valve (10) pour l'assemblage.
EP10752862.2A 2009-07-30 2010-07-26 Valve de distribution de produit fluide Active EP2459466B1 (fr)

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FR0955357A FR2948645B1 (fr) 2009-07-30 2009-07-30 Valve de distribution de produit fluide
PCT/FR2010/051571 WO2011012804A1 (fr) 2009-07-30 2010-07-26 Valve de distribution de produit fluide

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FR2948645B1 (fr) 2015-06-26
US20120181306A1 (en) 2012-07-19
FR2948645A1 (fr) 2011-02-04
CN102470970A (zh) 2012-05-23
BR112012002113A2 (pt) 2016-05-31
IN2012DN00795A (fr) 2015-06-26
WO2011012804A1 (fr) 2011-02-03
EP2459466A1 (fr) 2012-06-06

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