Ultrasonic motor

Details Ultrasonic motor Ultrasonic motor

1990-12-21

1991-10-08

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4108

Patent

active

050557327

ABSTRACT:
An ultrasonic motor comprises an elastic member inserted between a piezoelectric vibrator and a rotor. The elastic member comprises a base portion and plurality of projecting portions. Each of the projecting portions tapers toward its free end and is preferably of trapezoidal shape. The ratio of height to maximum width for each projecting portion is at least 1.0. The elastic member has a natural frequency substantially corresponding to a drive frequency of the vibrator.

REFERENCES:
patent: 4587452 (1986-05-01), Okumura et al.

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