Piezoelectrically actuated piston pump

Details Piezoelectrically actuated piston pump Piezoelectrically actuated piston pump

1998-04-15

2000-06-06

Leung, Philip

Pumps

Motor driven

Magnetostrictive chamber

4174132, 417488, 417521, 74 5, 123498, 310328, 310330, 310331, F04B 1700

Patent

active

060710888

ABSTRACT:
A piezoelectrically actuated fluid pump including a pump housing, a pump chamber, inlet and outlet ports for communicating the pump chamber with the exterior of the pump housing, valves for opening and closing the ports, a pre-stressed piezoelectric diaphragm member which is self-actuated, a piston member, and a power source is provided. The diaphragm member includes a prestressed piezoelectric element which is durable, inexpensive and lightweight as compared with diaphragm members of prior diaphragm pumps of comparable discharge capacity, and is actuated via electrical signals from an outside power source. The diaphragm member drives the piston member. No exterior mechanisms are necessary for driving the diaphragm member.

REFERENCES:
patent: 3657780 (1972-04-01), Jacobson
patent: 3657930 (1972-04-01), Jacobson
patent: 4519751 (1985-05-01), Beckman
patent: 4821726 (1989-04-01), Tamura et al.
patent: 5798600 (1998-08-01), Sager et al.
patent: 5816780 (1998-10-01), Bishop et al.

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