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:
Nov. 02, 1999
Filed:
Dec. 15, 1997
Toshio Maekawa, Tokyo, JP;
Mitsuru Koiwa, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An ignition coil device for an internal-combustion engine reduces the deterioration in reliability caused by heat stress. The ignition coil device is provided with: a case (5); a core (6) provided in the case (5); a primary coil (8) which is provided so that it surrounds the core (6) and which has a primary winding (13) trough which a primary current flows composed of a conductor wound around a bottomed cylindrical primary bobbin (12); a secondary coil (9) which is provided so that it surrounds the primary coil (8) and in which high voltage is generated by the interruption of the primary current; a stopper (21) which is provided at an opening (12a) of the primary bobbin (12) to close the opening (12a) of the primary bobbin (12); and an insulator (11) composed of a thermosetting resin which is provided in the case (5) to secure the primary coil (8) and the secondary coil (9) in the case (5). The stopper (21) prevents the insulator (11), which has not yet been thermally cured, from flowing between the core (6) and the primary bobbin (12) when it is charged into the case (5).