Fluid product dispensing valve

1. A fluid dispenser valve for mounting on a neck of a receptacle containing fluid, said valve comprising a valve body including a metering chamber and a valve member movable in said metering chamber between a rest position and a dispensing position, said metering chamber having a top gasket and a bottom gasket co-operating in leaktight manner with said valve member, said valve including a neck gasket co-operating in leaktight manner with said valve body and with said receptacle neck, said neck gasket is made integrally as a single piece with said top gasket, and said neck gasket includes at least one opening for passing at least a portion of the valve body, in which said valve body comprises a cylindrical body portion, a top edge portion, and a frustoconical body portion interconnecting said cylindrical body portion and said top edge portion, and each opening, after assembly, has the top axial edge of a radial projection of said frustoconical body portion passing therethrough.

2. A valve according to claim 1 , in which the diameter of said top edge portion is greater than the diameter of said cylindrical body portion.

3. A valve according to claim 1 , in which said neck gasket co-operates with the outer top axial surface of said top edge.

4. A valve according to claim 3 , in which said outer top axial surface of said top edge includes a sealing profile.

5. A valve according to claim 1 , in which said bottom gasket is disposed close to the junction between the cylindrical body portion and the frustoconical body portion.

6. A valve according to claim 5 , in which said valve body includes an inwardly-directed radial shoulder close to said junction between the cylindrical body portion and the frustoconical body portion.

7. A valve according to claim 6 , in which the top axial surface of said radial shoulder includes a sealing profile co-operating with said bottom gasket.

8. A valve according to claim 1 , in which said metering chamber comprises a hollow axial sleeve co-operating in leaktight manner with said top and bottom gaskets and defining said metering chamber on its inside.

9. A valve according to claim 1 , in which said frustoconical body portion includes at least one inwardly-directed radial projection.

10. A valve according to claim 9 , in which said frustoconical body portion includes a plurality of radial projections having internal axial edges defining an inscribed geometrical cylinder of diameter slightly greater than the outside diameter of a hollow axial sleeve defining the metering chamber.

11. A valve according to claim 1 , in which said valve includes a fastener member for fastening said valve body on said neck of the receptacle.

12. A valve according to claim 11 , in which said fastener member compresses said neck gasket while being assembled on the neck of the receptacle.

13. A valve according to claim 12 , in which, after being assembled on the neck of the receptacle, said fastener member co-operates with a rigid portion secured to or integral with said valve body to form an abutment and thus predetermine the amount of compression of said neck gasket during assembly of the fastener member.

14. A valve according to claim 1 , in which, after assembly, said fastener member co-operates with the top edge of at least one radial projection.

15. A fluid dispenser device comprising a receptacle containing the fluid, the fluid dispenser device comprising a valve according to claim 1 .

16. A device according to claim 15 , in which said receptacle includes a neck provided with a radial flange portion for receiving a top edge portion of the valve body and a frustoconical neck portion of shape corresponding substantially to the shape of a frustoconical body portion of the valve body.

17. A device according to claim 16 , in which the angle of said frustoconical body portion from said radial flange is slightly smaller than the angle of the frustoconical body portion from said top edge portion in order to facilitate assembling the valve body in the neck of the receptacle.

18. A fluid dispenser valve for mounting on a neck of a receptacle containing fluid, said valve comprising a valve body including a metering chamber and a valve member movable in said metering chamber between a rest position and a dispensing position, said metering chamber having a top gasket and a bottom gasket co-operating in leaktight manner with said valve member, said valve including a neck gasket co-operating in leaktight manner with said valve body and with said receptacle neck, said neck gasket is made integrally as a single piece single piece with said bottom gasket, said neck gasket integral with said bottom gasket is overmolded on a rigid element co-operating with the valve body.

19. A valve according to claim 18 , in which said neck gasket is connected integrally with said bottom gasket via at least one bridge of material.

20. The valve according to claim 18 , in which said valve body comprises a cylindrical body portion, a top edge portion, and a frustoconical body portion interconnecting said cylindrical body portion and said top edge portion.

21. The valve according to claim 20 , in which the diameter of said top edge portion is greater than the diameter of said cylindrical body portion.

22. The valve according to claim 20 , in which said frustoconical body portion includes at least one inwardly-directed radial projection.

23. The valve according to claim 18 , comprising a fastener member for fastening said valve body on said neck-of the receptacle.

24. A fluid dispenser device comprising a receptacle containing the fluid, the fluid dispenser device comprising a valve, said valve comprising a valve body-including a metering chamber and a valve member movable in said metering chamber between a rest position and a dispensing position, said metering chamber having a top gasket and a bottom gasket co-operating in leaktight manner with said valve member, said valve including a neck gasket co-operating in leaktight manner with said valve body and with said receptacle neck, said neck gasket is made integrally as a single piece with one of said top and bottom gaskets of the metering chamber;

said receptacle includes a neck provided with a radial flange portion for receiving a top edge portion of the valve body, and a frustoconical neck portion of shape corresponding substantially to the shape of a frustoconical body portion of the valve body; and

in which said frustoconical neck portion includes an outwardly-directed radial shoulder serving as a reference point during assembly of a fastener member on the neck of the receptacle, by crimping.

25. A device according to claim 24 , in which said radial shoulder enables the amount of compression of said neck gasket to be predetermined during assembly of the fastener member on the neck of the receptacle.