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:
Apr. 26, 2011
Filed:
Sep. 23, 2008
Koji Ando, Ishikawa, JP;
Mikio Takimoto, Ishikawa, JP;
Masahiro Takano, Ishikawa, JP;
Ryuji Shintani, Ishikawa, JP;
Koji Ando, Ishikawa, JP;
Mikio Takimoto, Ishikawa, JP;
Masahiro Takano, Ishikawa, JP;
Ryuji Shintani, Ishikawa, JP;
Nikko Company, Ishikawa, JP;
Ishikawa Prefectural Government, Ishikawa, JP;
Abstract
In the invention, each piezoelectric element for a vibrator for an ultrasonic motor has electrode regions for exciting stretching vibration and flexural vibration separately. Thus, the invention provides a vibrator for an ultrasonic motor, in which electrodes are provided for applying voltage to each of the polarized region, and further provides a stack-type piezoelectric vibrator for an ultrasonic motor, consisting of a stack of the said vibrators and having an extraction electrode pattern provided for short circuit with an external electrode. The vibrator of the invention has high controllability, especially in a fine movement region and is useful as a driving source in a positioning device, in which enhanced vibration efficiency can be obtained.