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. 10, 2001
Filed:
Jul. 06, 1998
Hitachi, Ltd., Tokyo, JP;
Abstract
An ignition coil comprises a center magnetic core, a secondary coil wound on a secondary coil bobbin which is arranged at an outer side of said center magnetic core, a primary coil wound on a primary coil bobbin which is arranged at an outer side of said secondary coil. At least one of said secondary coil bobbin and said primary coil bobbin is formed by a material which contains sulfur in a main chain of an aromatic class. The ignition coil has a superior anti-electric treeing. A coil component of the secondary coil and the primary coil of the ignition coil is arranged and accommodated in a coil case, an epoxy resin filling up at least melting silica is potted and is hardened. A development of the electric treeing can be restrained and the ignition coil having a superior endurance performance can be provided.