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. 20, 2015
Filed:
Feb. 27, 2013
Applicant:
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
Inventor:
Takuya Shimamura, Iwakura, JP;
Assignee:
NGK SPARK PLUG CO., LTD., Aichi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01T 13/20 (2006.01); H01T 13/36 (2006.01); F02P 13/00 (2006.01); H01T 13/08 (2006.01); H01T 13/34 (2006.01);
U.S. Cl.
CPC ...
H01T 13/36 (2013.01); F02P 13/00 (2013.01); H01T 13/08 (2013.01); H01T 13/34 (2013.01);
Abstract
A spark plug includes an insulating insulator and a metal shell. The metal shell includes a caulking portion, a seat portion with a tapering surface, a thread portion with a thread size equal to or less than M12, and a protrusion. The insulating insulator includes a lock portion locked to the protrusion, and is secured to the metal shell in a state held between the caulking portion and the protrusion.