Patent ID: 6186368
Filing Date: 2001-02-13
Classification: B05B

Abstract:
A finger pump assembly comprising:a pump body having a base supporting an outer housing and an inner housing, said outer housing and said inner housing being coaxial with one another and said outer housing and said inner housing at least partially defining a compression chamber therebetween;a closure supporting said pump body, and said closure having a mechanism for facilitating engagement with a spout of a container;a piston being at least partially received within said pump body and being slidable relative to said pump body between the coaxial outer and inner housings and along said outer housing, said piston having an annular lip for providing a sealing engagement with the pump body, and said piston being provided with a poppet valve seat defining a piston outlet;an actuator being coupled to said piston outlet, and said actuator having a discharge outlet communicating with said piston outlet for facilitating dispensing of a product;a poppet being at least partially accommodated by the inner housing, said poppet being biased away from said base of said pump body by a spring into engagement with said poppet valve seat to normally close said piston outlet and prevent flow of product therethrough, and said poppet, said base and said inner housing defining an interior cavity, and said interior cavity being provided with a ventilation port which allows said interior cavity, during operation of said poppet, to operate at ambient pressure; anda passageway communicating directly with said compression chamber, said passageway having an inlet and a one-way valve which allows the product to flow along said passageway and directly into said compression chamber without passing through the interior cavity.