Piezoelectric motor

Details Piezoelectric motor Piezoelectric motor

1993-07-13

1995-05-23

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4109, H02N 200

Patent

active

054184177

ABSTRACT:
A piezoelectric motor. Such motor includes a support (2), a stator (S2, S3) fixed to the support (2), piezoelectric means (10) adapted to be electrically excited so as to induce a vibratory motion in the stator (S2, S3), a rotor (R2, R3) mounted for rotation relative to the support (2), such rotor including a body on which transmission means (36) are arranged and adapted to transmit the vibratory motion of the stator (S2, S3) to the rotor (R2, R3) and in order to drive such rotor in rotation, and elastic support means (79) for the rotor on the stator, characterized in that the body of the rotor is formed by a structure (D2, D3) which is elastically deformable, at least in the direction of the stator, and which at least in part forms the support means (79). The invention is applied, for example, to a timepiece.

REFERENCES:
patent: 4548090 (1985-10-01), Sashida
patent: 4655096 (1987-04-01), Westhaver et al.
patent: 4871937 (1989-10-01), Kawai
patent: 5233257 (1993-08-01), Luthier et al.
patent: 5247220 (1993-09-01), Miyazawa et al.
Patent Abstract of Japan Improvement on Rotor Support of Ultrasonic Motor; Shinsei Kogyo K.K; vol. 12, No. 118 (E-600) (2965) Apr. 13, 1988 JP-A-62 247 775.
Patent Abstracts of Japan Ultrasonic Motor; Nikon Corp.; vol. 12 No. 369 (E-665) (3216); Oct. 4, 1988 JP-A-63 121 478.

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