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:
Sep. 17, 2019
Filed:
Dec. 18, 2018
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
Masaki Tokumaru, Anjo, JP;
NGK SPARK PLUG CO., LTD., Nagoya-shi, JP;
Abstract
Disclosed is spark plug including: an insulator with an axial hole; a center electrode disposed in a front end side of the axial hole; a cylindrical metal shell holding therein the insulator; and a ground electrode having a rod-shaped electrode base made of a Ni-based material and connected at a base end portion thereof to the metal shell and a tip made of a noble metal-based material and joined to a distal end portion of the electrode base. The distal end portion of the electrode base has a first surface facing a front end surface of the center electrode and second and third surfaces connected to the first surface. The tip includes a first tip member joined to the first surface and a second tip member joined to at least one of the second and third surfaces. The first and second tip members are separated apart from each other.