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:
Feb. 06, 2018
Filed:
Apr. 07, 2015
Applicant:
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
Inventor:
Magoki Shimadate, Takahama, JP;
Assignee:
NGK SPARK PLUG CO., LTD., Aichi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01T 13/32 (2006.01); H01T 13/39 (2006.01);
U.S. Cl.
CPC ...
H01T 13/32 (2013.01); H01T 13/39 (2013.01);
Abstract
In a spark plug, at a cross section of a ground electrode which is orthogonal to a longitudinal direction of an electrode base material and passes an axis of an electrode tip, a surface of the base material is exposed, and the following conditions are satisfied: 1.2E≦F≦1.9E; 0.05 mm≦Da≦0.30 mm; 0.05 mm≦Db≦0.30 mm; and 0.20 mm≦J≦0.70 mm.