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:
Dec. 03, 2013
Filed:
Feb. 19, 2008
Tsukasa Yamada, Sagamihara, JP;
Toyoki Tanaka, Atsugi, JP;
Tsukasa Yamada, Sagamihara, JP;
Toyoki Tanaka, Atsugi, JP;
Mitsumi Electric Co., Ltd., Tokyo, JP;
Abstract
A laminated piezoelectric element includes plural internal electrodes which are laminated and a dead area at outer regions thereof. The laminated piezoelectric element has first and second end surfaces in an expansion direction thereof. In bonding a first bonded surface of a piezoelectric element fixing portion to the first end surface, a bonding method includes forming a first adhesive accumulation in the first bonded surface, accumulating an adhesive agent in the first adhesive accumulation, and bonding the first end surface to the first bonded surface. In bonding a vibration friction element to the second end surface, the bonding method includes forming, in a second bonded surface of the vibration friction element, a positioning guide hole for guiding the second end surface of the laminated piezoelectric element and a second adhesive accumulation, accumulating the adhesive agent in the second adhesive accumulation, and bonding the second end surface to the vibration friction portion.