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. 15, 2020
Filed:
May. 15, 2017
Ngk Spark Plug Co., Ltd., Nagoya, JP;
Ryouki Yagi, Komaki, JP;
Masahiro Inoue, Gifu, JP;
NGK SPARK PLUG CO., LTD., Nagoya, JP;
Abstract
Disclosed is a spark plug in which a first electrode has a tip joined to an electrode base through a fusion zone. In a cross section of the first electrode taken along a center axis, an interface of the fusion zone and a tip includes a first region, a second region and a base point present on at least one side of the cross section. The base point is a point connection of the first and second regions and is located farthest away from the imaginary straight line in the direction parallel to the center axis. The base point is positioned so as to satisfy a condition of 0.1≤X/W≤0.4 where W is a length of the interface in a direction perpendicular to the center axis; and X is a distance between the base point and the center axis.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile