Ultrasonic motor with a vibrator having recesses

Details Ultrasonic motor with a vibrator having recesses Ultrasonic motor with a vibrator having recesses

1991-10-28

1993-10-26

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310328, H01L 4108

Patent

active

052569284

ABSTRACT:
An ultrasonic motor has a circular vibrator and a mover which is pressed into contact with the circular vibrator. A circular elastic member which constitutes the circular vibrator has a uniform thickness along a circumferential direction thereof, and has a plurality of recesses on a face of the circular elastic member opposing the mover. According to the above structure, uniform elastic travelling waves are generated in the circular elastic member of the vibrator, and a uniform contact is attained between the vibrator and the mover, and yet the development of cracks at bottoms of the recesses is prevented. A ring-like recess is provided on another elastic member which constitutes the mover.

REFERENCES:
patent: 4580073 (1986-04-01), Okumura et al.
patent: 5006746 (1991-04-01), Kasuga et al.
patent: 5148075 (1992-09-01), Shirasaki
patent: 5157300 (1992-10-01), Kataoka et al.
patent: 5177023 (1992-12-01), Kawai et al.

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