The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 2005
Filed:
May. 31, 2002
Takuji Okamoto, Kanagawa, JP;
Eiichi Yanagi, Tokyo, JP;
Masaharu Suzuki, Kanagawa, JP;
Yoshifumi Nishimoto, Tokyo, JP;
Hirokazu Hashidume, Tokyo, JP;
Osamu Yanase, Kanagawa, JP;
Takuji Okamoto, Kanagawa, JP;
Eiichi Yanagi, Tokyo, JP;
Masaharu Suzuki, Kanagawa, JP;
Yoshifumi Nishimoto, Tokyo, JP;
Hirokazu Hashidume, Tokyo, JP;
Osamu Yanase, Kanagawa, JP;
Canon Precision Kabushiki Kaisha, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
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.