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:
Aug. 02, 2005
Filed:
Feb. 26, 2003
Yoshihiro Matsubara, Mie, JP;
Shinichi Hiramatsu, Aichi, JP;
Masahiro Ishikawa, Aichi, JP;
Kazumi Kawamura, Mie, JP;
Yoshihiro Matsubara, Mie, JP;
Shinichi Hiramatsu, Aichi, JP;
Masahiro Ishikawa, Aichi, JP;
Kazumi Kawamura, Mie, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A method of making a spark plug having a noble metal chip joined to an electrode main body of a ground electrode by interposing therebetween an intermediate member. The method comprises the steps of prior to joining the noble metal chip to the electrode main body, joining the intermediate member and the noble metal chip together, placing a noble metal chip and intermediate member assembly on the electrode main body in a way as to allow the intermediate member to contact the electrode main body, and welding the electrode main body and the intermediate member together while restricting relative movement of the electrode main body and the intermediate member without applying an urging force to a joint between the intermediate member and the noble metal chip.