Ultrasonic driven type motor

Details Ultrasonic driven type motor Ultrasonic driven type motor

1989-02-10

1989-12-05

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310333, 310325, H01L 4108

Patent

active

048854999

ABSTRACT:
An ultrasonic driven type motor in which an ultrasonic torsional vibrator is activated to generate a forward turning torque for driving a rotor synchronously with the expansion of at least one piezoelectric actuator provided between the vibrator and the rotor, and to generate a return turning torque synchronously with the constriction of the piezoelectric actuator, and the piezoelectric actuator has a coupling control characteristic so that only the forward turning torque is selectively transmitted to the rotor.

REFERENCES:
patent: 4210837 (1980-07-01), Vasiliev et al.
patent: 4663556 (1987-05-01), Kumada
patent: 4705980 (1987-11-01), Mishiro
patent: 4728843 (1988-03-01), Mishiro
patent: 4764702 (1988-08-01), Mishiro
patent: 4812697 (1989-03-01), Mishiro

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