Ultrasonic motor

Details Ultrasonic motor Ultrasonic motor

1993-09-22

1995-08-08

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4108

Patent

active

054401909

ABSTRACT:
An ultrasonic motor comprising a vibrator for generating ultrasonic vibration, an electric-mechanical energy conversion element provided at node positions of the ultrasonic vibration, for generating ultrasonic vibration on the vibrator, the vibrator having an end face thereof which is inclined with respect to a central axis of the vibrator being rotatably driven by electric energy applied to the electric-mechanical energy conversion element, a plurality of displacement enlarging vibration pieces which are formed axially on the end face of the ultrasonic vibrator and in which grooves concentric with an outer periphery are arranged respectively at the node positions of the vibration, the displacement enlarging vibrating piece having a taper, and an element to be driven urged against end faces of the displacement enlarging vibration pieces by urging means and moved in a predetermined direction.

REFERENCES:
patent: 4642509 (1987-02-01), Kumada
patent: 4821697 (1989-03-01), Mishiro
patent: 4933590 (1990-06-01), Inoue et al.
patent: 4965482 (1990-10-01), Ohnishi et al.
patent: 4975614 (1990-12-01), Honda
patent: 5162692 (1992-11-01), Fujimura
patent: 5231325 (1993-07-01), Tamai et al.
patent: 5274295 (1993-12-01), Tsukimoto et al.

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