Patent ID: 7172097

Claim:
A fluid-dispenser pump comprising a pump body ( 10 ) comprising a measuring chamber ( 20 ) defined between an upper piston ( 30 ) sliding in an upper portion ( 11 ) of the pump body ( 10 ), and a lower piston ( 40 ) sliding in a lower portion ( 12 ) of the pump body ( 10 ), said lower piston ( 40 ) co-operating with a spring ( 50 ) disposed in said lower portion ( 12 ) of the pump body ( 10 ), wherein the spring ( 50 ) is isolated from any contact with the fluid, the lower portion ( 12 ) of the pump body including air-intake means ( 15 ) enabling air to be admitted or expelled during actuation of the pump, isolation means ( 60 ) being provided to prevent fluid from penetrating into said air-intake means ( 15 ); and wherein the upper portion of the pump body is configured to co-operate with a fixing ring and the lower portion of the pump body is connected to the upper portion and is configured to extend downwardly inside a reservoir.