Patent ID: 8231031
Filing Date: 2012-07-31
Classification: B05B,B65D,F16K

Abstract:
1. A lotion pump comprising: a nozzle head; a nozzle provided on the nozzle head; a passage formed in said nozzle; a connecting/guiding member connected with said nozzle head, an internal space of said connecting/guiding member and said passage in said nozzle forming a lotion passage, an upper one-way valve provided on said connecting/guiding member, said upper one-way valve positioned in the lotion passage between the internal space of said connecting/guiding member and said passage in said nozzle and having an open state and a closed state; a container cap with a connecting structure for connecting to a mouth of a liquid container; a housing having an upper end and an lower end, with the upper end connected to said container cap and the lower end connected to a lower one-way valve; and a piston, which is connected with or formed integrally with said connecting/guiding member and makes reciprocating motion in said housing, wherein said lotion pump is not provided with any spring, said upper one-way valve includes a cylindrical-shaped elastic tube and a valve seat, said valve seat is disposed on said connecting/guiding member and has a closed top end and at least one opening provided on a side surface, said elastic tube elastically covers the side surface of said valve seat and the at least one opening provided on the side surface, the at least one opening is in fluid communication with the internal space of the connecting/guiding member; wherein when said upper one-way valve is in the open state, the cylindrical-shaped elastic tube expands to form a gap between said elastic tube and the side surface so as to allow lotion to flow from the internal space of said connecting/guiding member to said passage of said nozzle through the at least one opening and the gap, and when said upper one-way valve is in the closed state, the cylindrical-shaped elastic tube closes said at least one opening so as to stop lotion from flowing between the internal space of said connecting/guiding member and the passage in said nozzle; and wherein said lotion pump is connected to the mouth of said liquid container, said lower one-way valve is in fluid communication with said liquid container, and the liquid container is fixed to a fixture.