Vibration wave driving device and apparatus having the same

Details Vibration wave driving device and apparatus having the same Vibration wave driving device and apparatus having the same

1997-09-09

1998-11-10

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H02N 200

Patent

active

058348786

ABSTRACT:
A vibration wave driving device includes a vibrating member that generates a vibration therein, and a rotary member which is in press-contact with the vibrating member and is rotated relative to the vibrating member by the vibration. The rotary member includes an external output portion located at approximately a center of rotation, a contact portion, and a radial compression portion that connects the external output portion and the contact portion and generates a compression force between the contact portion and the vibrating member. The thickness of the compression portion becomes larger from a middle portion toward the contact portion and from the middle portion toward the output portion.

REFERENCES:
patent: 5164629 (1992-11-01), Nakanishi
patent: 5225734 (1993-07-01), Nakanishi
patent: 5313132 (1994-05-01), Nakanishi
patent: 5493164 (1996-02-01), Nogarede
patent: 5508580 (1996-04-01), Maeno et al.
patent: 5686776 (1997-11-01), Takagi et al.
patent: 5726519 (1998-03-01), Gonnard et al.
patent: 5747951 (1998-05-01), Audren

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