Patent ID: 7780043

Claim:
A fastener device for fastening a dispenser member ( 4 ) onto a receptacle neck ( 31 ), the device comprising: a fastener ring ( 1 ) including both abutment means ( 13 ; 141 , 142 , 143 ) and fastener means ( 12 ) for fastening onto the receptacle neck; and a covering hoop ( 2 ) that is engaged axially from top to bottom around the ring ( 1 ), the hoop including hook means ( 25 ) co-operating with the abutment means for acting together to define axial retainer means for axially blocking the hoop on the ring; wherein the retainer means include a plurality of mutual engagement elements ( 251 , 252 , 253 , 254 ; 13 ; 25 , 141 , 142 , 143 ) defining distinct axial engagement positions for engaging the hoop on the ring; and the hoop includes a top end and a bottom end for coming to bear on the receptacle, the hook means being formed by an upwardly-directed inner shoulder that is defined in the proximity of the bottom end.