ASSEMBLY DESIGNED TO BE FIXED ON THE NECK OF A FLUID PRODUCT CONTAINER AND DISPENSING DEVICE COMPRISING SAME

1 . A unit for fastening on a neck of a receptacle containing a fluid, said unit comprising:

a fastener ring ( 1 ) that is suitable for fastening a dispenser member ( 3 ), such as a pump or a valve, on the neck of the receptacle; and

a gasket ( 2 ) for interposing between the fastener ring ( 1 ) and said neck of the receptacle;

said unit being characterized in that said gasket ( 2 ) is pre-mounted in clamping engagement in the fastener ring ( 1 ), in such a manner as to hold said gasket ( 2 ) in its stressed state in said ring ( 1 ), both before and after fastening said unit on said neck of the receptacle.

2 . A unit according to claim 1 , in which said gasket ( 2 ) includes an inside edge ( 22 ) that defines a mounting opening, and an outside edge ( 23 ), with the fastening of the gasket ( 2 ) in the ring ( 1 ) being the result, preferably exclusively, of co-operation between said outside edge ( 23 ) of the gasket ( 2 ) and said ring ( 1 ).

3 . A unit according to claim 1 or claim 2 , in which said gasket ( 2 ) is in clamping engagement with an axial side wall ( 12 ) of said ring ( 1 ).

4 . A unit according to claim 1 , 2 , or 3 , in which the ring ( 1 ) and/or the gasket ( 2 ) include(s) at least one fastener profile ( 120 , 230 ) that is suitable for holding said gasket ( 2 ) in clamping engagement in said ring ( 1 ).

5 . A unit according to claim 4 , in which said ring ( 1 ) and/or said gasket ( 2 ) include(s) a plurality of fastener profiles ( 120 , 230 ) that are distributed circumferentially around said side wall ( 12 ) of said ring ( 1 ) and/or around said outside edge ( 23 ) of said gasket ( 2 ), said profiles ( 120 , 230 ) being spaced apart from one another in such a manner as to form a plurality of anchor points.

6 . A unit according to claim 4 or claim 5 , in which said at least one fastener profile ( 120 ) is formed on said ring ( 1 ), said profile ( 120 ) projecting substantially radially inwards from said side wall ( 12 ) of the ring ( 1 ), so as to come to bite into said outside edge ( 23 ) of said gasket ( 2 ).

7 . A unit according to claim 4 , 5 , or 6 , in which said at least one fastener profile ( 230 ) is formed on said gasket ( 2 ), said profile ( 230 ) projecting radially outwards from said outside edge ( 23 ) of the gasket ( 2 ), so as to come to bear in clamping engagement against said side wall ( 12 ) of the ring ( 1 ).

8 . A unit according to any one of claims 3 to 7 , in which the gasket ( 2 ) is held in axial abutment against a radial flange ( 11 ) of the ring ( 1 ) in the pre-mounted position of the gasket ( 2 ) in the ring ( 1 ).

9 . A unit according to any one of claims 2 to 8 , in which the inside edge ( 22 ) of the gasket ( 2 ) is not in contact with the dispenser member ( 3 ), such that said gasket ( 2 ) does not exert any radial force on said dispenser member ( 3 ).

10 . A unit according to any preceding claim, in which said fastener ring ( 1 ) includes a mounting portion ( 10 ) that is suitable for fastening to the dispenser member, said mounting portion ( 10 ) being connected to a radial flange ( 11 ) that is connected to an axial side wall ( 12 ), said axial side wall supporting fastener means for fastening to a receptacle neck, said gasket, in its pre-mounted state, being in contact with said radial flange ( 11 ), and in clamping engagement with said axial side wall ( 12 ).

11 . A fluid dispenser device comprising a fluid receptacle, and a dispenser member ( 3 ), such as a pump or a valve, that is suitable for dispensing fluid contained in said receptacle, the device being characterized in that it further comprises a unit according to any preceding claim.

12 . A device according to claim 11 , in which said gasket ( 2 ) does not exert any radial force or stress on said dispenser member ( 3 ), either before or after assembling said unit on said receptacle.