Covering member, method for making same and dispensing device using same

Abstract

A covering memeber ( 1 ) for mounting on a fastener ring ( 2 ), the ring and the covering member co-operating with each other to form a fastener system for fastening a dispenser member ( 3 ), such as a pump or a valve, on a recepacle neck ( 40 ), the covering member presenting a general configuration that is substantialy cylindrical, and comprising a top end ( 12 ), a bottom end ( 11 ), an outside wall ( 14 ), and an inside wall ( 15 ) for coming into clamping contact around the ring ( 2 ), the inside wall ( 15 ), at the bottom end ( 11 ), forming a fastener profile ( 111 ) that projects inwards, the covering member being characterized in that said profile defines a sharp catch ( 112 ) that is directed inwards and upwards, the profile being formed in direct proximity to the bottom end of the covering member so as to be able to engage said covering member under a fastner ring having a bottom end that comes practically into contact with the receptacle.

1 . A covering member for mounting on a fastener ring, the ring and the covering member co-operating with each other to form a fastener system for fastening a dispenser member, such as a pump or a valve, on a receptacle neck, the covering member presenting a general configuration that is substantially cylindrical, and comprising a top end, a bottom end, an outside wall, and an inside wall for coming into clamping contact around the ring, the inside wall, at the bottom end, forming a fastener profile that projects inwards, the covering member being characterized in that said profile defines a sharp catch that is directed inwards and upwards, the profile being formed in direct proximity to the bottom end of the covering member so as to be able to engage said covering member under a fastener ring having a bottom end that comes practically into contact with the receptacle. 
   
   
       2 . A covering member according to  claim 1 , in which the profile presents a section in the form of a tapering point that is directed inwards and upwards and that is terminated by the catch. 
   
   
       3 . A covering member according to  claim 1 , the bottom end includes a bottom annular edge that is directed downwards, the profile comprising an inner flank that connects the catch to the annular edge, and an outer flank that connects the catch to a groove bottom. 
   
   
       4 . A covering member according to  claim 3 , in which the inside wall forms a wall section that co-operates with the outer flank to form a groove having a bottom that is formed by the junction of the outer flank and the wall section. 
   
   
       5 . A covering member according to  claim 4 , in which the groove is directed upwards and inwards starting from its bottom. 
   
   
       6 . A covering member according to  claim 4 , in which the groove presents a width that increases from the bottom. 
   
   
       7 . A method of manufacturing a covering member according to  claim 1 , the method comprising the following successive operations:
 a. making a covering member with a bottom end that is inwardly chamfered in such a manner as to form a projecting catch that substantially extends the outside wall; and   b. pushing the projecting catch inwards in such a manner as to bring it into the proximity of the inside wall.   
   
   
       8 . A method of manufacturing a covering member according to  claim 7 , in which the pushing operation is performed in a plurality of steps using various pusher tools. 
   
   
       9 . A method of manufacturing a covering member according to  claim 7 , in which a final tool calibrates the radial position of the catch. 
   
   
       10 . A fluid dispenser comprising a receptacle, a dispenser member, such as a pump or a valve, and a fastener system for fastening the dispenser member on a fluid reservoir, the fastener system comprising a fastener ring and a covering member according to  claim 1 , the fastener profile being in engagement with the ring. 
   
   
       11 . A fluid dispenser device according to  claim 10 , in which the ring presents a fastener shoulder under which the profile is engaged.