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:
Sep. 28, 2010
Filed:
Jan. 27, 2005
Kenichi Kumagai, Nagoya, JP;
Wataru Matsutani, Nagoya, JP;
Kenji Kobayashi, Gamagori, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
To provide a spark plug in which separation of a tip can be prevented and enough wear resistance can be obtained without increasing the content of nickel in the tip portion, and a use method of the spark plug. In a spark plug () including an outside electrode () including an electrode body portion () and a tip () bonded to the electrode body portion (), and a center electrode (), and the tip () is opposed to the front end portion of the center electrode () through a spark discharge gap (G), the electrode body portion () is made of a nickel alloy containing 13 to 18% by mass of Cr, 0.03 to 0.08% by mass of C, 1 to 3.5% by mass of Mo, 0 to 0.8% by mass of Si, Al, Mn and Ti, and 68% by mass or more of Ni, and the tip () is made of a platinum alloy containing 0 to 4% by mass of Ni.