Ultrasonic driving device

Details Ultrasonic driving device Ultrasonic driving device

1988-09-14

1990-01-09

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310366, 310369, H01L 4108

Patent

active

048930474

ABSTRACT:
A stator consists of a cylindrical piezoelectric vibrator and electrodes respectively divided in two in its inside and outside portions. When alternative current voltage is applied to respective one of divided electrodes in the inside and outside portions, reversible progressive waves generate on the end and side portions of the stator. When a rotary member is combined with the end or side portion of the stator, the rotary member can reversibly be moved.

REFERENCES:
patent: 4019073 (1977-04-01), Vishnevsky et al.
patent: 4634916 (1987-01-01), Okada et al.
patent: 4752711 (1988-06-01), Tsukimoto et al.

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