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:
Jan. 21, 2020
Filed:
Jan. 29, 2019
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
Tsutomu Kobayashi, Inazawa, JP;
NGK SPARK PLUG CO., LTD., Nagoya-shi, JP;
Abstract
A spark plug includes a ground electrode and a center electrode, at least one of which includes an electrode body, an electrode tip, and a weld part formed therebetween. The weld part has an orthogonal projection on a virtual plane perpendicular to a layering direction of the electrode body and the electrode tip. The orthogonal projection includes projecting portions extending in a specific direction. The weld part satisfies a condition that a first line segment is shorter than a second line segment, wherein: the first line segment is a virtual line segment connecting peaks of adjacent two projecting portions; and the second line segment is a virtual line segment that is perpendicular to the first line segment and connects the first line segment to an outer periphery of the weld part at a point farthest from the first line segment.