Patent ID: 7484940

Claim:
A compact, high capacity pump, comprising: A) an inlet port and an outlet port, B) a fluid chamber, C) a first one-way processor controlled active valve located flow wise between said inlet port and said fluid chamber, D) a second one-way processor controlled active valve located flow wise between said fluid chamber and said outlet port, E) a piezoelectric stack, F) a diaphragm separating said piezoelectric stack and said fluid chamber, G) a power source for providing periodically varying voltage signals to said piezoelectric stack to cause expansion and contraction of said piezoelectric stack to produce fluid flow from said inlet port to said outlet port, H) a first power source for providing power to said first one-way valve, I) a second power source for providing power to said second one-way valve, J) a microprocessor electrically connected to said first power source and said second power source, and K) a pressure sensor means electrically connected to said microprocessor, said pressure sensor means for sensing the pressure inside said fluid chamber and for sending a signal to said microprocessor when said pressure sensor means senses a change in pressure inside said fluid chamber causing said microprocessor to send a control signal to said first power source and said second power source causing said first power source to open or close said first one-way valve and causing said second power source to open or close said second one-way valve.