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US 4,739,212 AGranted
Ultrasonic motor
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYoshinobu Imasaka, Hiroshi Yoneno, Masanori Sumihara, Akira Tokushima
Life of this patent
Estimating the term…
Abstract
A contacting member of a composite material of organic fiber and resin is provided to an inner surface of either a rotor or a stator of an ultrasonic motor. Noise is suppressed, starting torque is better and wear is decreased.
Claims7
An ultrasonic motor compromising:
- a stator provided with a piezoelectric element,
- said piezoelectric element being for vibrating said stator by travelling waves of ultrasonic frequency,
- a rotor, configured to be rotated by contacting said stator, and
- a contact member of composite material provided on an inner surface of one of:
- (a) said stator or (b) said rotor, the contact member being a composite material of organic fiber and resin.
2 more elements
Dependencies are inferred from the claim text.