Actuator device

Details Actuator device Actuator device

1991-11-21

1992-10-13

Budd, Mark O.

Electricity: motive power systems

Nonmagnetic motor

310316, 310323, H01L 4108

Patent

active

051554186

ABSTRACT:
An actuator device has a plurality of projections formed in a vibrator, with the projections being in pressure contact with a friction surface of a contact member, and relative movement between the vibrator and the projections is performed by generating vibrations in the vibrator. The actuator device prevents the contact member and the projections from stopping at identical positions in pressure contact with one another at every stop operation of driving by the actuator device to produce projection marks on the friction member, causing wow/flutter and decreasing torque performance.

REFERENCES:
patent: 4240141 (1980-12-01), Vasiliev et al.
patent: 4580073 (1986-04-01), Okumura et al.
patent: 4794294 (1988-12-01), Shimizu et al.
patent: 4914336 (1990-04-01), Yamasaki
patent: 5001404 (1991-03-01), Kataoka
patent: 5004964 (1991-04-01), Kataoka et al.

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