Ultrasonic motor improved in driving efficiency

Details Ultrasonic motor improved in driving efficiency Ultrasonic motor improved in driving efficiency

1992-05-26

1993-04-20

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4108

Patent

active

052045773

ABSTRACT:
An ultrasonic motor incomprises a stator including a piezoelectric element and an elastic body capable of producing progressive vibration waves on its drive surface by excitation of the piezoelectric element, and a rotor which is driven by the progressive vibration waves produced and which includes a rotor base member and a slider member bonded to the rotor base member and brought into contact with the drive surface of the elastic body by being pressed against the same. The area of the contact portion of the slider member brought into contact with the elastic body is reduced in comparison with the area of the bonding portion of the slider member bonded to the rotor base member, thereby improving the driving efficiency.

REFERENCES:
patent: 4495432 (1985-01-01), Katsuma et al.
patent: 4587452 (1986-05-01), Okumura et al.
patent: 4692650 (1987-09-01), Okumura et al.
patent: 4743788 (1988-05-01), Takagi et al.
patent: 4752711 (1988-06-01), Tsukimoto et al.

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