Patent ID: 6916159

Claim:
A device for pumping a predetermined volume of fluid comprising: a cavity operably associated with an inlet and an outlet, the inlet of a construction sufficient for operable communication with a source of fluid, the cavity at least partially defined by a resilient housing; an inlet check valve operably associated with the inlet and an outlet check valve operably associated with the outlet; a member operably associated with the resilient housing, the member disposed in a first position by way of a biasing force and moveable therefrom to a second position, the member sufficient to fully compress the resilient housing when in one of the first position and the second position, and sufficient to fully decompress the resilient housing when in a different one of the first position and the second position; a biasing element operably associated with the member and of a construction sufficient to provide the biasing force; an actuator comprising a shape memory alloy, the actuator operably associated with the member and of a construction sufficient to move the member from the first position to the second position when the shape memory alloy undergoes a dimensional change relative to an original condition thereof, and sufficient to move the member from the second position to the first position when the shape memory alloy returns toward the original condition; wherein, when the inlet is in operable communication with the source of fluid, the cavity is empty of the predetermined volume of fluid when the resilient housing is fully compressed and the cavity is filled with the predetermined volume of fluid when the resilient housing is fully decompressed.