Ultrasonic motor

Details Ultrasonic motor Ultrasonic motor

2011-06-14

2011-06-14

Benson, Walter (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S323020, C310S323090, C310S323190

Reexamination Certificate

active

07960897

ABSTRACT:
An ultrasonic motor produces elliptical vibration by inducing longitudinal vibration and flexural vibration at the same time and drives a driven body by obtaining a drive power from the elliptical vibration. The ultrasonic motor includes a piezoelectric device, reinforcing members which are provided at the antinodes of the flexural vibration on the top side of the piezoelectric device, friction contact members which are provided at the antinodes of the flexural vibration on the bottom side of the piezoelectric device so as to transmit the driving force to the driven body, a holding member which is provided on the piezoelectric device and positioned and held by a case, and a pressure member which presses the holding member so that the friction contact members are brought into a pressure contact with the driven body such that the driven body can be driven by friction.

REFERENCES:
patent: 7230366 (2007-06-01), Sasaki et al.
patent: 2005/0253484 (2005-11-01), Kishi et al.
patent: 2005/0258711 (2005-11-01), Funakubo
patent: 2006/0061235 (2006-03-01), Funakubo
patent: 2006/0061241 (2006-03-01), Sasaki
patent: 2006/0169746 (2006-08-01), Ozaki et al.
patent: 2006/0191086 (2006-08-01), Mourad et al.
patent: 2006/0238072 (2006-10-01), Funakubo
patent: 2008/0192584 (2008-08-01), Yamazaki
patent: 8-18379 (1996-01-01), None

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