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. 27, 2013
Filed:
Jun. 23, 2010
Akira Suzuki, Nagoya, JP;
Mai Nakamura, Inazawa, JP;
Mamoru Musasa, Nagoya, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A spark plug () includes an insulator () and a metal shell (), including a middle section () positioned between a collar section () and a tool engaging section (). The middle section () has a bulged section (), a first slender section () and a second slender section () that is the most slender at a portion positioned further to the leading end side than the bulged section (). In a cross-section including the axis CL, when the distance between both slender sections () and () along the axis CLis F (mm) and the bulged amount to the inside in diametrical direction of a most bulged section (M) with respect to an imaginary line that connects a portion that is positioned furthest to the inside in diametrical direction of both slender sectionsandis G (mm), the relationship 0.00<G/F≦0.18 is satisfied.