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. 07, 2012
Filed:
Aug. 22, 2006
Nobuyuki Hotta, Aichi, JP;
Eiji Kodera, Aichi, JP;
Kazushige Ohbayashi, Aichi, JP;
Noriyasu Sugimoto, Aichi, JP;
Nobuyuki Hotta, Aichi, JP;
Eiji Kodera, Aichi, JP;
Kazushige Ohbayashi, Aichi, JP;
Noriyasu Sugimoto, Aichi, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
Provided is a spark plug that includes a center electrode extending in an axial direction, a cylindrical insulator that holds the center electrode, and a cylindrical main metal fitting, which has a ground electrode at a tip portion thereof. The cylindrical main metal fitting includes a tool engagement portion for mounting the spark plug to an engine and a metal fitting-side fitting portion provided at a rear side of the main metal fitting opposite from the tip portion. The metal fitting-side fitting portion holds the insulator in a tightly fitted state in a radial direction.