Piezoelectric rotary actuator

Details Piezoelectric rotary actuator Piezoelectric rotary actuator

1983-10-07

1984-08-28

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310317, 310332, 310333, H01L 4108

Patent

active

044685831

ABSTRACT:
A rotary actuator for converting electrical energy into rotating torque comprises a stator, a rotor, a pair of annular first piezoelectric elements contracting and expanding in the radial direction in response to the application of an electrical signal, and a plurality of second piezoelectric elements disposed between the first piezoelectric elements and a holding portion of the stator for causing displacement of the first piezoelectric elements in the circumferential direction in response to the application of the electrical signal. These piezoelectric elements are alternately energized to continuously rotate the rotor.

REFERENCES:
patent: 3902084 (1975-08-01), May, Jr.
patent: 3902085 (1975-08-01), Bizzigotti
patent: 4019073 (1977-04-01), Vishnevsky et al.
patent: 4219755 (1980-08-01), O'Neill

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