Patent ID: 7147135

Claim:
A manually actuated fluid dispenser pump comprising a pump body ( 10 ), a piston ( 20 ) mounted to slide in leaktight manner in said pump body ( 10 ) between a rest position and an actuating position, an actuating rod ( 30 ) that is an integral one-piece construction with the piston, a dispensing head assembled onto the actuating rod, and a ferrule ( 40 ) fixed to a top edge ( 11 ) of the pump body ( 10 ), to define the rest position for said piston ( 20 ), said actuating rod ( 30 ) being mounted to slide in said ferrule ( 40 ), said pump being characterized in that the ferrule ( 40 ) is provided with at least one internal sealing lip ( 45 ) co-operating in leaktight manner with said actuating rod ( 30 ) in all positions of said actuating rod; and wherein a part of the piston abuts against an abutment edge of the ferrule when the piston is in the rest position, said at least one internal sealing lip protruding inwardly from said ferrule and being spaced apart from said abutment edge.