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:
Aug. 04, 2015
Filed:
Jan. 26, 2011
Masahiro Takano, Kanazawa, JP;
Kenichi Hirosaki, Kanazawa, JP;
Yuta Yoshida, Kanazawa, JP;
Takuya Nagata, Hakusan, JP;
Shou Makino, Hakusan, JP;
Satoru Ichimura, Hahusan, JP;
Takashi Yoshida, Hakusan, JP;
Masayuki Ishida, Hakusan, JP;
Hiroshi Kawai, Hakusan, JP;
Mikio Takimoto, Hakusan, JP;
Kentaro Nakamura, Meguro-ku, JP;
Masahiro Takano, Kanazawa, JP;
Kenichi Hirosaki, Kanazawa, JP;
Yuta Yoshida, Kanazawa, JP;
Takuya Nagata, Hakusan, JP;
Shou Makino, Hakusan, JP;
Satoru Ichimura, Hahusan, JP;
Takashi Yoshida, Hakusan, JP;
Masayuki Ishida, Hakusan, JP;
Hiroshi Kawai, Hakusan, JP;
Mikio Takimoto, Hakusan, JP;
Kentaro Nakamura, Meguro-ku, JP;
ISHIKAWA PREFECTURE, Ishiwaka, JP;
NIKKO COMPANY, Ishikawa, JP;
TOKYO INSTITUTE OF TECHNOLOGY, Tokyo, JP;
Abstract
Electrodes (), having curved sections in the shape of the outline thereof, are disposed in areas of a rectangular plate-shaped piezoelectric transducer element () in which the strain in the natural mode of vibration is large. The electrodes () which excite a bending vibration are disposed in areas in which the strain in the bending natural mode is at least a predetermined value, and the outline curved sections of the electrodes () are shaped so as to follow along strain contours (), and the electrode () which excites a stretching vibration is disposed in an area in which the strain in the stretching natural mode is at least a predetermined value, thus providing a transducer for an ultrasonic motor which aims to reduce transducer loss (increasing vibration efficiency), and improve transducer durability and reliability.