Patent ID: 6186369
Filing Date: 2001-02-13
Classification: B05B,B65D,F04B

Abstract:
A pump for dispensing flowable media comprising a base plate (1), means (11, 42) for securing the base plate (1) to a container, a base plate sleeve (17) projecting from said base plate (1) and surrounding an inlet (14) in said base plate (1), a piston (3, 49) carrying a sleeve (22, 53) disposed in relative telescopic sliding relationship to said base plate sleeve (17) and in part defining therewith a pump chamber (35, 54), an outlet (23, 51) for dispensing flowable media from said pump chamber (35, 54), first spring means (26) for returning said piston (3, 49) from a decompressed condition thereof, a valve mechanism (30-33) housed substantially within said pump chamber (35, 54), said valve mechanism (30-33) including first and second sealing plates (30, 31, respectively) disposed for selectively opening and closing flowable media communication with respect to said inlet (14) and said outlet (23, 51), and at least one further spring means (32 and/or 33) associated with said sealing plates (30, 31) for normally biasing the sealing plates (30, 31) to positions closing-off flowable media communication through the respective inlet (14) and outlet (23, 51).