Piezoelectrically actuated fluid pumps

Details Piezoelectrically actuated fluid pumps Piezoelectrically actuated fluid pumps

1998-04-03

2000-03-28

Walberg, Teresa

Pumps

Motor driven

Magnetostrictive chamber

4174132, F04B 1700

Patent

active

060423455

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, valving means for opening and closing the ports, two pre-stressed piezoelectric diaphragm members which are self-actuated, and energizing means is provided. The diaphragm members include 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. No exterior mechanical means for driving the diaphragm members is necessary. A modification is disclosed in which a central computer independently controls the phase angle of oscillation of the two diaphragm members, providing precise flow rate control.

REFERENCES:
patent: 5816780 (1998-10-01), Bishop et al.

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