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. 10, 2018
Filed:
Mar. 05, 2014
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V 3/10 (2006.01); H02J 5/00 (2016.01); H02J 7/02 (2016.01); H02J 50/60 (2016.01); H02J 50/12 (2016.01); H02J 17/00 (2006.01);
U.S. Cl.
CPC ...
H02J 50/60 (2016.02); G01V 3/10 (2013.01); H02J 5/005 (2013.01); H02J 7/025 (2013.01); H02J 17/00 (2013.01); H02J 50/12 (2016.02);
Abstract
A foreign object detector includes: an oscillator circuithaving a coiland resonant capacitors Cx, Cy, the oscillator circuitbeing configured to output a voltage which includes an AC component and a DC component, the AC component having a positive cycle and a negative cycle; and an electric circuit for sensing a variation of the AC component and a variation of the DC component in the voltage output from the oscillator circuitwhen a foreign object approaches the coil