Linear ultrasonic motor

Details Linear ultrasonic motor Linear ultrasonic motor

1990-08-30

1992-03-31

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310321, 310328, H01L 4108

Patent

active

051011328

ABSTRACT:
A linear ultrasonic motor which presses a rail against an ultrasonic vibrator, which is substantially elliptically vibrating and conducts relative movement, wherein a protrusion or a groove is provided such that the sectional form of the rail is concave, convex, trapezoidal or triangular. Furthermore, the above vibrator is provided with a groove or a protrusion which uniformly abuts the groove or protrusion of the rail. In the linear ultrasonic motor according to the invention, there is no deterioration of responsiveness due to a support mechanism and no unnecessary vibration, so generated noise is small.

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"Ultrasonic Motors Using Electric Ceramic Multi-Mode Vibrators", by T. Takamo et al., Dept. of Comm. Engr., T. Institute, 12-21-87.

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