Patent ID: 8800957

Claim:
A liquid dispensing valve, comprising: a liquid dispensing portion including a liquid inlet for receiving the liquid and a liquid outlet for discharging the liquid, a valve member extending along a longitudinal axis and mounted for movement relative to said liquid outlet between open and closed positions, and a liquid passage communicating between said liquid inlet and said liquid outlet; an actuation portion with an air inlet for receiving air from a source of pressurized air; an air passageway coupled with said air inlet; and a pneumatic actuator operated by positively pressurized air flowing within said air passageway to move said valve member at least to the open position, said pneumatic actuator being coupled to said valve member along the longitudinal axis such that said pneumatic actuator moves along the longitudinal axis with said valve member; and an electrically operated air supply device interacting with said air passageway so as to control the flow of pressurized air to said pneumatic actuator, wherein said actuation portion includes a chamber, and said pneumatic actuator divides said chamber into a first chamber portion in continuous communication with pressurized air and a second chamber portion selectively receiving pressurized air from said air passageway.