Patent ID: 9718069
Date: 2017-08-01
CPC Classifications: A47K,B05B

Claim:
1. A non-aerosol foam pump for use in association with an unpressurized liquid container and a foaming element comprising: a liquid pump portion having a liquid chamber with a liquid internal volume and a shuttle liquid piston including a shuttle portion and a main portion and the shuttle portion slidingly engages the main portion, the liquid chamber being in flow communication with the unpressurized liquid container and in flow communication with the foaming element; an air pump portion having an air chamber with an air internal volume, the air chamber in flow communication with the foaming element; and wherein the non-aerosol foam pump has an activation stroke activating the liquid pump portion and the air pump portion and a return stroke and during the activation stroke the air internal volume is reduced and during a beginning stage of the activation stroke the shuttle portion slides relative to the main portion such that the liquid internal volume of the liquid chamber remains the same and during a later stage of the activation stroke the shuttle portion engages the main portion so that the liquid internal volume of the liquid chamber is reduced.