Patent ID: 6021924
Filing Date: 2000-02-08
Classification: B05B

Abstract:
Manually controlled metering pump for a bottle with a deformable sheath, comprising a metering chamber disposed between a lower valve and an upper valve, a push button urged by a spring and a spout communicating with the metering chamber via a central channel, the upper valve (48) being carried by a disk (47) constituting the base of a hollow rod (43) secured to the push button (34), and bearing below a hollow piston (32) adapted to be driven by the push button (34), and sliding in the metering chamber, characterized in that the lower valve (21) is flexible, of truncated conical shape and is maintained on the bottom of the pump by a key, in that the hollow piston (32) carries a constriction (33) onto which comes to bear a central tube (39) carried by the push button (34), and in that the hollow rod (43) is enlarged below the constriction (33), a sealing O-ring (44) being disposed between the enlargement (45) of the hollow rod (43) and the constriction (33).