DOUBLE ACTING VALVE FOR LIQUID PUMPS

摘要

A refill unit (100) includes a container (102) for holding a liquid and a pump (101). The pump includes a housing (103) that has one or more liquid inlets (106). In addition, the housing includes one or more liquid outlets (120). At least a portion of the liquid outlet(s) is made of a resilient material. A liquid chamber (136) having a first volume and a second volume is located at least partially within the housing. A valve body (130) having a protruding member (132) and a valve seat (134) is located within the housing. The protruding member acts as a one-way valve allowing fluid to flow from the container into the liquid chamber and preventing fluid from flowing out of the liquid chamber into the container. In addition, the liquid outlet contacts the valve seat to seal the outlet and flexes away from the valve seat to allow liquid under pressure to exit the liquid chamber.