Patent ID: 8172555

Claim:
A diaphragm foam pump comprising: (a) a diaphragm made of a flexible material defining a mixing chamber and having an inlet opening and an outlet opening; (b) an inlet passageway in fluid communication with a reservoir configured to contain a foamable liquid and said inlet opening, said inlet passageway having a one-way valve therein; (c) an outlet passageway in fluid communication with said outlet opening, and having a one-way valve therein; (d) an air inlet in said inlet passageway having a one-way valve; (e) an electric motor; (f) a motor-driven element associated with said electric motor; wherein actuating said electric motor drives said motor driven element to repeatedly collapse and expand said diaphragm, and wherein expansion of said diaphragm creates a vacuum causing foamable liquid and air to flow into said mixing chamber in the form of a liquid and air mixture, and collapsing of said diaphragm causes the liquid and air mixture to be forced out through said outlet passageway as foam.