Patent ID: 7147133

Claim:
A foam forming unit for use in combination with a liquid container, comprising: a pump for air provided with an inlet having an inlet valve, an outlet having an outlet valve and a pressure chamber with a movable member for increasing or reducing the volume of the pressure chamber, a pump for liquid provided with an inlet having an inlet valve, an outlet having an outlet valve and a pressure chamber with a movable member for increasing or reducing the volume of the pressure chamber, a mixing chamber having at least one foam forming element and connected to the outlets of both pumps, and a dispensing part comprising an outflow channel, which is connected between the mixing chamber and a foam opening, wherein the movable members of the pumps are interconnected and operated by a common operating member, an independent mechanical coupling element interconnects the movable member of the air pump and the movable member of the liquid pump and is formed separately from the movable member of the air pump and the movable member of the liquid pump, and at least one of the outlet valves is provided as a thin membrane and integrally formed with a member of said pumps as one piece of the same plastic material.