Ultrasonic motor

Details Ultrasonic motor Ultrasonic motor

1991-03-14

1992-04-07

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310328, H01L 4108

Patent

active

051031280

ABSTRACT:
An ultrasonic motor is disclosed. A rotor is pressed into contact with a stator disposed within a housing for rotation in accordance with the electrostrictive deformation of the stator. A screw shaft integrally rotates with the rotor, to convert the rotation of the rotor into the linear movement of an external body. A radial bearing holds the screw shaft to the case in a rotatable manner about its axis. The radial bearing including an inner ring secured to the screw shaft and an outer ring secured to the case for transferring a thrust load from the screw shaft to the case.

REFERENCES:
patent: 4560263 (1985-12-01), Katsuma et al.
patent: 4723086 (1988-02-01), Leibovich et al.
patent: 4734610 (1988-03-01), Okumura et al.
patent: 4787262 (1988-11-01), Kowaza et al.
patent: 4793689 (1988-12-01), Aoyagi et al.
patent: 4935659 (1990-06-01), Naka et al.
patent: 4937488 (1990-06-01), Fujie et al.
patent: 4959579 (1990-09-01), Kuwabara et al.
patent: 4980599 (1990-12-01), Kuwabara et al.

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