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:
Dec. 05, 2017
Filed:
Jun. 30, 2015
Applicant:
Ngk Spark Plug Co., Ltd., Nagoya, JP;
Inventor:
Masahiro Inoue, Gifu, JP;
Assignee:
NGK SPARK PLUG CO., LTD., Nagoya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01T 13/32 (2006.01);
U.S. Cl.
CPC ...
H01T 13/32 (2013.01);
Abstract
A spark plug capable of suppressing the occurrence and growth of a crack and oxide scale between an electrode tip and a melt portion, satisfies the relationships of C≧Dand C≧D, where Cis a distance between a reference line RL and a point Pa, Dis a distance between the reference line RL and a point Pa, Cis a distance between the reference line RL and a point Paand Dis a distance between the reference line RL and a point Pa