Is a
Patent attributes
Patent Applicant
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
April 4, 2017
Patent Application Number
13789920
Date Filed
March 8, 2013
Patent Citations Received
Patent Primary Examiner
Patent abstract
A foam pump including a housing and a piston that reciprocates within the housing is disclosed herein. The piston has a hollow portion and an orifice through the wall of the piston. A first seal located proximate the upper end of the piston provides a seal between the piston and the housing. A liquid inlet is located in the side wall of the housing at a point lower than the top of the piston. A one-way liquid inlet valve is located proximate the liquid inlet and a one-way liquid outlet valve is located prior to the liquid outlet. A charge chamber is defined at least in part by the liquid inlet valve, the liquid outlet valve, a wall of the piston and a wall of the housing.
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