Patent ID: 8080029

Claim:
An apparatus, comprising: an actuator body defining an input port and an exhaust port; an actuating member movable in the actuator body from a first position to a second position, wherein the actuating member comprises a gap; a diaphragm coupled to the actuator body and the actuating member, wherein the diaphragm, the actuator body and the actuating member together enclose a chamber accessed by the input port and the exhaust port, wherein a shape of the enclosed chamber changes with motion of the diaphragm; a tube coupled to the actuating member; wherein the actuating member is movable from the first position in which the gap of the actuating member at least partially overlaps the input port such that the input port is open to the chamber and the exhaust port is blocked by the actuating member and the second position in which the gap of the actuating member at least partially overlaps the exhaust port such that the exhaust port is open to the chamber and the input port is blocked by the actuating member.