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:
Jul. 18, 2006
Filed:
Jul. 20, 2004
Yasuhiro Sakai, Tokyo, JP;
Yasuhiro Sakai, Tokyo, JP;
USC Corporation, Tokyp, JP;
Abstract
In a piezoelectric power generation device and a piezoelectric ceramics member used in the device excellent in its power generation efficiency in which the polarization of piezoelectric ceramics elements is set to the same direction and an extremely thin metallic electrode is sandwiched in between the piezoelectric ceramics elements so that a current output obtained in the piezoelectric power generation device can be improved substantially to about two times as high as a current output obtained by a usual piezoelectric power generation device and the parasitic resonance of the electrode can be prevented, the piezoelectric power generation device generates power by applying a distortion deformation to piezoelectric ceramics members formed in plate shapes. The piezoelectric power generation device includes the piezoelectric ceramics members each having the two plate shaped piezoelectric ceramics elements whose polarization is set to the same direction and the extremely thin metallic electrode interposed between the piezoelectric ceramics elements, the piezoelectric ceramics member being formed in a laminar shape by uniting the piezoelectric ceramics elements through the metallic electrode; and the cushion materials for supporting central parts or both end parts of one surfaces of the piezoelectric ceramics members. Thus, the piezoelectric power generation device has a soft support structure in which the natural oscillation of the piezoelectric ceramics members is hardly transmitted to other structural members. A step part is formed in the piezoelectric ceramics member and the metallic electrode.