Patent ID: 7658598

Claim:
A pump including first and second diaphragm chambers, each diaphragm chamber including a diaphragm having a driven side, the diaphragms being coupled together, a pressure sensor positioned to detect a pressure associated with the driven side of at least one of the diaphragms and to output a signal indicative thereof, a controller configured to receive the signal from the pressure sensor and monitor a pressure to detect the position of at least one of the diaphragms, an air supply valve positioned to supply a flow of pressurized air for the first and second diaphragm chambers, the controller communicates with the air supply valve to control the flow of pressurized air based on the signal received from the pressure sensor, and a main valve in fluid communication with the air supply valve, wherein the main valve alternates between a first position supplying air to the first diaphragm chamber and a second position supplying air to the second diaphragm chamber.