Ultrasonic motor

Details Ultrasonic motor Ultrasonic motor

1986-05-27

1988-04-05

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310328, H01L 4108

Patent

active

047361298

ABSTRACT:
An ultrasonic motor includes piezoelectric resonators for generating vibration waves, an elastic vibration member along which an elastic wave propagates when driving of the piezoelectric resonators is driven, a sliding member located in contact with the elastic vibration member under pressure and adapted to slide along the elastic vibration member when the elastic wave propagates, and a friction member located on the sliding member and brought into frictional contact with the elastic vibration member, the friction member being made of a material having a hardness of less than 100 and larger than 94 measured by a spring A type hardness tester, a hardness of 40 to 120 measured by a Rockwell's R type hardness tester, hardness of 20 to 80 measured by a Rockwell's M type hardness tester, a hardness of 40 to 90 measured by a Shore A type hardness tester, or a hardness of 20 to 70 measured by a Shore D type hardness tester.

REFERENCES:
patent: 4019073 (1977-04-01), Vishnevsky et al.
patent: 4634916 (1987-01-01), Okada et al.

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