Vibration type drive unit

Details Vibration type drive unit Vibration type drive unit

2006-03-21

2006-03-21

Dougherty, Thomas M. (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S323020, C310S323080, C310S323170

Reexamination Certificate

active

07015623

ABSTRACT:
A vibration type drive unit comprises a vibrator made of an elastic body to which an electromechanical energy conversion element is fixed and a moving element which is in contact with a surface of the vibrator so that by applying an alternating signal to the electromechanical energy conversion element. A progressive wave is generated on a surface of the vibrator to move the moving element, wherein the vibrator has a plate-like elastic body and a column-like elastic body, the electromechanical energy conversion element is fixed to a side surface of the plate-like elastic body. The column-like elastic body is formed on a central portion of a surface of the plate-like elastic body which is different from the surface to which the electromechanical energy conversion element is fixed.

REFERENCES:
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patent: 5886455 (1999-03-01), Tsukimoto
patent: 6781283 (2004-08-01), Tsukimoto
patent: 6867532 (2005-03-01), Brady et al.
patent: 0473423 (1992-03-01), None

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