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:
Apr. 07, 1992
Filed:
Nov. 08, 1990
Applicant:
Inventors:
Naotaka Nakamura, Nagoya, JP;
Shigemi Ito, Anjo, JP;
Assignee:
Nippondenso Co., Ltd., Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ; F02P / ;
U.S. Cl.
CPC ...
123634 ; 1231 / ; 336 83 ; 336107 ; 336110 ;
Abstract
An ignition coil disposed and used in the neighborhood of a part made of a conductive material is provided with a first core made of a magnetic material, around which a primary coil and a secondary coil are wound; and a second core made of a magnetic material and having a cylindrical portion, in which the primary coil and the secondary coil and the first core are contained, and forms a closed magnetic path in conjunction with the first core.