Patent ID: 6698623
Filing Date: 2004-03-02
Classification: B05B,G01F

Abstract:
A fluid dispenser pump actuated manually to dispense a metered quantity or â€œdoseâ€  of fluid each time it is actuated, said pump including a pump body (10) containing a pump chamber (11) and a return spring (50) resiliently urging the pump towards its rest position and returning it automatically to said rest position after each occasion on which it is actuated, said pump chamber (11) being provided with an outlet valve (40), said outlet valve (40) being urged towards a closed position by the pressure from the fluid while the pump is being actuated, and being opened mechanically by a valve control element (60) at the end of actuation, once the full dose has been prepared, said pump being characterized in that it includes valve locking means for keeping the outlet valve (40) in the open position while the fluid is being expelled from the pump chamber (11), to prevent the flow of fluid from closing said outlet valve (40) again before the full dose of fluid has been expelled, said outlet valve (40) being closed mechanically at the end of fluid expulsion by said valve control element (60) under the effect of said return spring (50) of the pump.