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, 2012
Filed:
Apr. 21, 2010
Applicants:
Nobuo Kitajima, Tokyo, JP;
Satoshi Shinbo, Tokyo, JP;
Inventors:
Nobuo Kitajima, Tokyo, JP;
Satoshi Shinbo, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 17/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A choke coil includes a pair of E-shaped cores, first and second coil windings around central legs of the E-shaped cores, and an I-shaped core. Side legs of the pair of E-shaped cores are positioned face to face with each other with the I-shaped core intervening. There are gaps between the I-shaped core and each central leg. Electrical currents flow in the first and second coil windings in the same direction, and magnetic fluxes generated by each of the electrical currents are in opposite directions in the I-shaped core.