Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2005-09-13
2005-09-13
Budd, Mark (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S323030
Reexamination Certificate
active
06943481
ABSTRACT:
The present invention has been devised in order to raise driving efficiency of the vibration wave driving apparatus. A vibration member of a vibration wave driving apparatus of the present invention comprises the vibration member constituted of an elastic member and an electro-mechanical energy conversion element, and a rotor contacting the vibration member, and the vibration member generates a travelling wave in the elastic member when an alternating signal is applied to the electro-mechanical energy conversion element, in which an electrode film provided on a surface of the electro-mechanical energy conversion element of the vibration member is divided into a plurality of circular areas with different radiuses and each circular area is divided into a plurality of electrodes along its peripheral direction.
REFERENCES:
patent: 4484099 (1984-11-01), Kawai et al.
patent: 4504760 (1985-03-01), Yamamoto et al.
patent: 4786836 (1988-11-01), Tokushima
patent: 4829209 (1989-05-01), Kawasaki et al.
patent: 5140214 (1992-08-01), Kimura et al.
patent: 5192890 (1993-03-01), Kimura et al.
patent: 5408156 (1995-04-01), Kawasaki et al.
patent: 5484216 (1996-01-01), Kimura et al.
patent: 5698929 (1997-12-01), Seki et al.
Hashidume Hirokazu
Nishimoto Yoshifumi
Okamoto Takuji
Suzuki Masaharu
Yanagi Eiichi
Budd Mark
Canon Precision Kabushiki Kaisha
LandOfFree
Vibration member and vibration wave driving apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vibration member and vibration wave driving apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vibration member and vibration wave driving apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3397234