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:
Jul. 31, 2018
Filed:
Jun. 23, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Toshihiro Ifuku, Yokohama, JP;
Tatsuo Furuta, Machida, JP;
Kenichi Takeda, Yokohama, JP;
Shinya Koyama, Tokyo, JP;
Hidenori Tanaka, Yokohama, JP;
Satoshi Fujita, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A vibration wave drive device includes an annular piezoelectric element including a piezoelectric material and multiple electrodes provided sandwiching the piezoelectric material, the annular piezoelectric element being configured to vibrate by a traveling wave of a wavelength λ; and a power feeding member including at least an electric wire for supplying electric power to the element, the feeding member being provided at a first surface of the element. The element includes at least two driving regions, and a non-driving region arranged between two of the at least two driving regions and having an average annular length of nλ/4, n being an odd number. At least one electrode provided on the first surface is arranged across the driving region and the non-driving region, and is electrically connected to the feeding member only in the non-driving region.