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:
Jul. 27, 1999
Filed:
May. 29, 1998
Denso Corporation, Kariya, JP;
Abstract
An ignition coil has a stress absorbing member with a coefficient of linear expansion which is smaller than a coefficient of linear expansion of a potting resin. The stress absorbing member faces along a circuit element of a mold ignition circuit and is buried in the potting resin. Thus, stress, caused by temperature change, which is applied to the circuit element of the mold ignition circuit from the potting resin can be reduced by the stress absorbing member. Therefore, peeling at a bonding portion of the circuit elements or at the crack can be prevented. Furthermore, the stress absorbing member is only facing along the circuit element mounting surface, and the mold ignition circuit is not wrapped by the stress absorbing member. Therefore, heat radiation from the mold ignition circuit is not suppressed by the stress absorbing member. The radiation performance of the ignition apparatus is thus improved, and the durability and credibility of the ignition circuit is improved.