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. 19, 2017
Filed:
Mar. 21, 2017
Denso Corporation, Kariya, Aichi-pref., JP;
Ryohei Akiyoshi, Kariya, JP;
Hidekazu Fujimoto, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A spark plug for an internal combustion engine provided with a cylindrical housing, a ceramic insulator, a center electrode and a ground electrode. The ground electrode has a body base disposed from a front end surface of the cylindrical housing to a front end-side thereof. The ground electrode has a spark discharge gap formed therebetween itself and the center electrode. The body base is provided with pair of side-connecting surfaces which connect the inner surface and the outer surface. Each of the side-connecting surfaces having a side flat surface which is a flat surface parallel to an aligning direction of the center electrode and the body base. A distance between the pair of the side flat surfaces is a maximum width of the body base. A minimum distance between the inner surface and the side flat surface satisfies a relationship of 0.1 mm≦L≦0.5 mm, in the aligning direction.