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:
Nov. 24, 2015
Filed:
Apr. 17, 2012
Applicant:
Akira Suzuki, Nagoya, JP;
Inventor:
Akira Suzuki, Nagoya, JP;
Assignee:
NGK SPARK PLUG CO., LTD., Nagoya, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01T 13/20 (2006.01); F16J 15/06 (2006.01); F16J 15/08 (2006.01); H01T 13/08 (2006.01);
U.S. Cl.
CPC ...
F16J 15/061 (2013.01); F16J 15/0881 (2013.01); H01T 13/08 (2013.01);
Abstract
Provided is a technique which realizes securement of gas-tightness and suppression of loosening of a gasket. A spark plug includes a tubular metallic shell extending in an axial direction, and an annular gasket provided around the metallic shell. The gasket is solid and contains copper as a main component and nickel in an amount of 0.1 wt. % or more. The gasket has a maximum thickness of 0.4 mm or more in the axial direction, and the gasket has a Vickers hardness of 30 HV to 150 HV.