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. 08, 2011
Filed:
Mar. 27, 2008
Tomoaki Kato, Aichi, JP;
Kazuyoshi Torii, Aichi, JP;
Mamoru Musasa, Aichi, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A spark plug () including a center electrode () and a ground electrode (), which is formed by joining a ground electrode chip () to a ground electrode base material () via an intermediate member (). A method for producing the spark plug () includes providing a projecting portion () on the intermediate member (), and projection-welding the intermediate member () to the ground electrode base material () by means of the projecting portion (), to thereby join the intermediate memberto the ground electrode base material (). Further, the intermediate member () of the spark plug () includes a cylindrical columnar portion () which is joined to the ground electrode chip (), and a flange portion () which is joined to the ground electrode base material () and which flange portion () has a diameter greater than that of the cylindrical columnar portion ().