Ultrasonic motor

Details Ultrasonic motor Ultrasonic motor

2006-09-15

2008-11-25

Dougherty, Thomas M (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S323130

Reexamination Certificate

active

07456547

ABSTRACT:
An ultrasonic motor is provided with a circular stator including a piezoelectric element and a comb teeth body with a multitude of comb teeth circumferentially aligned thereon, and a circular rotor supported by a rotating shaft and pressed against the comb teeth body, wherein the comb teeth respectively include, at least in a portion thereof press-contacting the rotor, a plurality of pin-shaped elements radially aligned at a predetermined interval. The pin-shaped element is elastically deformable in a radial direction at least in a tip portion thereof, and has a predetermined rigidity in a circumferential direction.

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patent: 2002-058266 (2002-02-01), None
English Language Abstract of JP 2002-058266.
U.S. Appl. No. 11/470,744 to Korosawa, which was filed Sep. 7, 2006.
U.S. Appl. No. 11/549,996 to Korosawa, which was filed Oct. 17, 2006.

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