Ultrasonic motor

Details Ultrasonic motor Ultrasonic motor

2008-11-17

2010-06-08

Dougherty, Thomas M (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S323020, C310S323160

Reexamination Certificate

active

07732983

ABSTRACT:
A ultrasonic motor includes a piezoelectric device, and friction contact members moves a driven body by a elliptical vibration. And the ultrasonic motor includes a holder member which is disposed corresponding to a node of a longitudinal vibration or in the vicinity thereof on the face of the piezoelectric device and a node of a flexural vibration or in the vicinity thereof, the holder member having an engagement convex portion and being provided with a pair of sliding contact projection portions, a position limiting member which has accommodation holes each constituted of a sliding contact concave portion for accommodating the sliding contact projection portion such that it makes a sliding contact therewith freely and an engagement concave portion for accommodating the engagement convex portion, and a pressure member which presses the holder member so as to bring the friction contact members into pressure contact with the driven body.

REFERENCES:
patent: 5982075 (1999-11-01), Hayasaka
patent: 6979395 (2005-12-01), Pace et al.
patent: 2005/0253484 (2005-11-01), Kishi et al.
patent: 2009/0167112 (2009-07-01), Sakamoto

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