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:
Feb. 19, 2013
Filed:
Nov. 14, 2008
Akira Suzuki, Nagoya, JP;
Naomichi Miyashita, Kasugai, JP;
Kazuyoshi Torii, Aichi, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
An ignition part () of a ground electrode () includes a fused part () in which construction materials of a base portion () and a noble metal member () are fused and mixed by performing laser welding on the two. In the fused part (), an average ratio P of components originated from the noble metal member () at points K, L, and Mis equal to or greater than 80%, and an average ratio Q of components originated from the base portion at points K, L, and Mis equal to or higher than 20%, and P+Q is equal to or higher than 160%. Accordingly, it is possible to obtain joining strength in the parts in the ignition part (), thereby sufficiently preventing the generation of cracks, separation, and the like due to thermal stress.