Ultrasonic driving device

Details Ultrasonic driving device Ultrasonic driving device

1989-08-23

1990-12-04

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310325, 310333, H01L 4108

Patent

active

049756141

ABSTRACT:
A stator includes piezoelectric vibrators of piezoelectric ceramic put between a long metal block and a short metal block, which are fixed with screw threads at opposite ends of a bolt. When a high frequency alternating current voltage is applied to the piezoelectric vibrators, elliptic compounded vibration, progressive vibration and so on, which is torsional vibration due to the screw threads of the bolt compounded with longitudinal vibration due to the expansion and contraction of the piezoelectric vibrators, is generated on the end surface and the side surface of the stator. A driven member is engaged on the end surface or the side surface of the stator and is driven by the elliptic vibration.

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patent: 4703214 (1987-10-01), Mishiro
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patent: 4728843 (1988-03-01), Mishiro

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