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. 02, 1991
Filed:
Oct. 06, 1989
Tomokazu Umezaki, Himeji, JP;
Tadao Takaishi, Himeji, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An ignition coil unit for an internal combustion engine comprising a magnetic iron core, a primary coil wound around the iron core, a secondary coil electromagnetically coupled with the primary coil, a control circuit for controlling a primary electric current, and a case containing the iron core, the primary coil, the secondary coil and the control circuit therein. The ignition coil unit may further comprise a heat sink attached to the iron core, and the mold case may contain and integrally support the iron core and the heat sink, with at least part of the heat sink exposed to exterior of the mold case. The mold case defines a cavity containing therein the primary coil and the secondary coil wound around the iron core, and the space around the primary and second coils within the cavity is filled by a resin material.