Patent attributes
A hand foam pump fabricated entirely from plastic components for dispensing foamable liquids, is provided. The hand foam pump includes an actuator, a closure, a housing, cylinder bores for an air piston and a liquid piston within the housing and an air piston and a liquid piston fixed to a stem, wherein the air and liquid pistons are reciprocally mounted within the cylinder bores, and check valves, among other components. An elastic, dome shaped, plastic return spring is utilized to return the actuator to its rest position after actuation. The plastic return spring is positioned over the closure and below the actuator. The all plastic hand foam pump is suitable for dispensing foamable liquids from a dispenser bottle. Used pumps do not require disassembly to be recycled.
