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:
Oct. 11, 2022
Filed:
Jun. 03, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Tomohiro Watanabe, Yokohama, JP;
Akira Uebayashi, Tokyo, JP;
Tatsuo Furuta, Machida, JP;
Shinya Koyama, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A vibration wave motor includes an annular oscillator, and an annular moving member provided so as to be in press contact with the oscillator. The oscillator includes an annular vibrating plate, and an annular piezoelectric element provided on a first surface of the vibrating plate. The vibrating plate is in contact with the moving member via a second surface of the vibrating plate, which is opposite the first surface. The piezoelectric element has a plurality of drive phase electrodes. When a driving region represents a region of the oscillator in which the drive phase electrodes are provided, and a non-driving region represents a remaining region of the oscillator, a contact area ratio S1 between the vibrating plate and the moving member in the non-driving region is less than a contact area ratio S2 between the vibrating plate and the moving member in the driving region.