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:
Jan. 06, 1987
Filed:
Aug. 14, 1985
Applicant:
Inventors:
Yoshiaki Akachi, Chiba, JP;
Takeo Matsumaru, Chiba, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
336180 ; 336183 ; 336208 ; 336222 ;
Abstract
A coil apparatus for the use of a switching power supply circuit has been found. The coil apparatus having two overlapped coil bobbins has an improved winding arrangement. This arrangement is such that one (P.sub.1) of primary windings which are provided for an inner bobbin are divided into two windings (P.sub.11, P.sub.12) which are electrically coupled with each other, and remaining primary windings (P.sub.2) are sandwiched between the two divided windings (P.sub.11, P.sub.12).