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:
Jun. 11, 2024
Filed:
Nov. 17, 2020
Ngk Spark Plug Co., Ltd., Nagoya, JP;
Takashi Sekizawa, Nagoya, JP;
Tomokatsu Kashima, Nagoya, JP;
Yuya Ono, Nagoya, JP;
Yuki Toumatsu, Nagoya, JP;
Yudai Kawaguchi, Nagoya, JP;
Kazuyoshi Torii, Nagoya, JP;
NGK SPARK PLUG CO., LTD, Nagoya, JP;
Abstract
A spark plug that can reduce variation in a discharge point. The spark plug includes: a center electrode; a metal shell insulating and holding the center electrode; and a ground electrode including a base material having one end portion connected to the metal shell, and a tip connected to another end portion of the base material. The tip has a discharge surface opposed to the center electrode with a spark gap therebetween. The discharge surface has a quadrangular shape and is chamfered at four sides thereof. Only a first side which is one of the four sides is provided with a C chamfer.