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:
Oct. 09, 2012
Filed:
Oct. 15, 2010
Tsutomu Shibata, Owariasahi, JP;
Takehito Kuno, Nagoya, JP;
Tomoo Tanaka, Kitanagoya, JP;
Kenji Nunome, Nagoya, JP;
Shoichiro Nagatomo, Toyoake, JP;
Tsutomu Shibata, Owariasahi, JP;
Takehito Kuno, Nagoya, JP;
Tomoo Tanaka, Kitanagoya, JP;
Kenji Nunome, Nagoya, JP;
Shoichiro Nagatomo, Toyoake, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
The object of the invention is to provide a spark plug including a central electrode and/or a ground electrode with a gap, which can suppress generation of corrosion-like generated foreign substances while maintaining high thermal conductivity and high strength. The gap between the central electrode and the ground electrode with at least one of the central electrode and the ground electrode formed from an electrode material including 96% by mass or more of Ni, in which the electrode material includes a total content of from 0.05% by mass to 0.45% by mass of at least one selected from a group consisting of Y and rare earth elements, 0.05% by mass or more of Mn, and a total content of 0.01% by mass or more of at least one selected from a group consisting of Ti, V, and Nb, and the ratio (a/b) of the total content (a) of Ti, V, and Nb to the content (b) of Mn is from 0.02 to 0.40.