Piezoelectric revolving resonator and ultrasonic motor

Details Piezoelectric revolving resonator and ultrasonic motor Piezoelectric revolving resonator and ultrasonic motor

1988-03-28

1989-09-19

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310328, 310366, 310369, H01L 4108

Patent

active

048684465

ABSTRACT:
A piezoelectric revolving resonator comprising a circular or cylindrical transducer element, in which the center of gravity of the resonator revolves eccentrically around the center of an original circle as a result of resonance thereof upon excitation of the 1st order resonance frequency. Also, the ultrasonic motor is disclosed comprising a resonator of gravity center revolution type with the center of gravity thereof revolving in reversibly clockwise or counterclockwise direction and a rotor pressure fitted on the resonator, the motor utilizing the rotational torque received by the motor through a frictional force.

REFERENCES:
patent: 2439499 (1948-04-01), Williams
patent: 3351393 (1967-11-01), Emmerich
patent: 4453103 (1984-06-01), Uishneusky et al.
patent: 4562374 (1985-12-01), Sashida
patent: 4633204 (1986-12-01), Gounji et al.
patent: 4634916 (1987-01-01), Okada et al.
patent: 4705980 (1987-11-01), Mishiro
patent: 4734610 (1988-03-01), Okumura et al.
patent: 4757223 (1988-07-01), Ueyama
Nikkei Mechanical-1986, pp. 95-98.

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