Patent ID: 6811060
Filing Date: 2004-11-02
Classification: B05B

Abstract:
A fluid dispenser pump comprising a pump body (10) containing a pump chamber (11) defined between an upper piston (20) and a lower piston (30), said pistons (20, 30) being mounted to elide in leaktight manner in said pump body (10), said pump chamber (11) being provided with an inlet valve (40) and with an outlet valve (50), said lower piston (30) co-operating with said outlet valve (50), when the full dose has been metered out, to open said outlet valve and to make it possible to deliver the fluid contained in the pump chamber (11), said dispenser pump being characterized in that the lower piston (30) is separate from inlet valve seat (42) and is mounted to float in the pump chamber (11), said lower piston (30) being returned to its rest position by said inlet valve seat (42).