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. 20, 2010
Filed:
Dec. 03, 2004
Yasuharu Onishi, Minatu-ku, JP;
Yasuhiro Sasaki, Minato-ku, JP;
Nozomi Toki, Minato-ku, JP;
NEC Corporation, Tokyo, JP;
Abstract
A piezo-electric actuator comprising: piezo-electric elementhaving piezo-electric bodywhich is provided with at least two opposing surfaces, wherein the surfaces perform an expanding and contracting motion in accordance with the state of an electric field; a constraint memberfor constraining piezo-electric elementon at least one of the two surfaces, a supporting member disposed around constraint member, and a plurality of beam memberseach having both ends fixed to constraint memberand supporting member, respectively, wherein each beam member has a neutral axis for bending in a direction substantially parallel with the constrained surface, wherein the constraint member vibrates by vibration which is generated by the constraining effect between the constraint member and the piezo-electric element, and is amplified by the beam members.