Piezoelectric actuator

Details Piezoelectric actuator Piezoelectric actuator

1987-07-14

1989-02-07

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

123 32, 123478, 2395331, H01L 4108

Patent

active

048033936

ABSTRACT:
A piezoelectric actuator for moving an object member by utilizing a volume change of a piezoelectric element. The piezoelectric actuator includes a piezoelectric element, an envelope having a bellows or the like at least as a part of the wall, and a pressure chamber in which work oil is hermetically enclosed. Resiliency of the bellows or the like prevents breakdown of the piezoelectric element due to the supply of biased counter force, and highly improved sealing performance of the pressure chamber prevents leakage of the control oil.

REFERENCES:
patent: 2565158 (1951-08-01), Williams
patent: 2587482 (1952-02-01), Keller
patent: 3153229 (1964-10-01), Roberts
patent: 3500799 (1970-03-01), Benson
patent: 3501099 (1970-03-01), Benson
patent: 3509714 (1970-05-01), Walton
patent: 3598506 (1971-08-01), O'Neill
patent: 3635016 (1972-01-01), Benson
patent: 3738576 (1973-06-01), O'Neill
patent: 3766415 (1973-10-01), Dame
patent: 4333434 (1982-06-01), Brunais et al.

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