Ultrasonic motor

Details Ultrasonic motor Ultrasonic motor

2008-07-22

2008-07-22

Dougherty, Thomas M (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S323080

Reexamination Certificate

active

07402935

ABSTRACT:
An ultrasonic motor is provided with a circular stator including a piezoelectric element and a comb teeth body and a circular rotor supported by a rotating shaft and disposed in close contact with the comb teeth body. The stator and the rotor are magnetized in opposite polarities to each other so that the stator and the rotor are brought into close contact by an attractive magnetic force generated therebetween in an axial direction.

REFERENCES:
patent: 4739212 (1988-04-01), Imasaka et al.
patent: 6664712 (2003-12-01), Rayner et al.
patent: 7002310 (2006-02-01), Cavarec et al.
patent: 2005/0090366 (2005-04-01), Namba
patent: 63-242181 (1988-10-01), None
patent: 6-269181 (1994-09-01), None
patent: 8-191576 (1996-07-01), None
patent: 10-215590 (1998-08-01), None
patent: 2000-60154 (2000-02-01), None
U.S. Appl. No. 11/532,244 to Korosawa, which was filed on Sep. 15, 2006.
U.S. Appl. No. 11/549,996 to Kurosawa, which was filed on Oct. 17, 2006.
English language Abstract of JP 2000-060154, no date provided.

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