Patent ID: 6827559
Filing Date: 2004-12-07
Classification: F04B

Abstract:
A micropump comprising:a pump body including a fluid inlet channel, a fluid outlet channel and pumping reservoir, the fluid inlet channel and the fluid outlet channel communicating with the pumping reservoir, a diaphragm covering the pumping reservoir, a piezoelectric strip actuator attached to the diaphragm such that by applying a voltage to the actuator, the diaphragm can be raised or lowered relative to the pumping reservoir and wherein the piezoelectric strip actuator has two ends and is mounted in the micropump in a manner that permits both ends of the actuator to flex when a voltage is applied to the actuator, and a valve on the inlet channel and the outlet channel, the valve opening and closing the inlet and the outlet channel in response to the raising and lowering of the diaphragm.