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. 30, 2014
Filed:
Oct. 08, 2010
Anna-maija Karkkainen, Helsinki, FI;
Jukka Kyynarainen, Espoo, FI;
Leif Roschier, Vantaa, FI;
Heikki Kuisma, Helsinki, FI;
Anna-Maija Karkkainen, Helsinki, FI;
Jukka Kyynarainen, Espoo, FI;
Leif Roschier, Vantaa, FI;
Heikki Kuisma, Helsinki, FI;
VTI Technologies Oy, Vantaa, FI;
Toyota Motor Corporation, Toyota-Shi, JP;
Abstract
A device () harvests energy from vibration and/or strain and utilizes both capacitive () and piezoelectric elements (). The principle of operation is out-of-plane capacitive harvester, where the bias voltage for the capacitive element is generated with a piezoelectric element (). The device utilizes a thin dielectric film () between the capacitor plates () maximizing the harvested energy and enabling the harvester operation in semi-contact mode so that short circuits are prevented. For example when utilized in a wheel or the like, the capacitor is closed and opened at every strike or every turn of a wheel being thus independent of the harvester's mechanical resonance frequency.