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:
Aug. 15, 2011
Akira Gotani, Tokyo, JP;
Akira Gotani, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A wireless power feeder feeds power from a feeding coil to a receiving coil by wireless using a magnetic field resonance phenomenon. The feeding coil is constructed in a rotatable manner. A power transmission control circuit that supplies AC power to the feeding coil so as to make the feeding coil feed the AC power to the receiving coil. The feeding coil is constructed such that the magnetic characteristics thereof in the circumferential direction are made non-uniform. Concretely, a magnetic body is installed at only a part of the circumference of the feeding coil to make the magnetic characteristics of the feeding coil in the circumferential direction non-uniform.