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. 05, 2021
Filed:
Sep. 27, 2019
Denso Corporation, Kariya, JP;
Shintaro Itoh, Nisshin, JP;
Daisuke Tanaka, Nisshin, JP;
Akimitsu Sugiura, Kariya, JP;
Ryota Wakasugi, Nisshin, JP;
Kaori Doi, Kariya, JP;
Kanechiyo Terada, Kariya, JP;
Tetsuya Miwa, Kariya, JP;
Fumiaki Aoki, Nisshin, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A spark plug has a tubular ground electrode, an insulator, and a center electrode. The insulator has an insulator protruding portion protruding to a tip end side in a plug axial direction with respect to the ground electrode. The center electrodehas an exposed portion exposed through a tip end of the insulator protruding portion. The exposed portion of the center electrode has a first part covering the insulator protruding portion from the tip end side in the plug axial direction, and a second part extending from the first part to a base end side in the plug axial direction and covering the entire circumference of an outer peripheral surface of the insulator protruding portion from an outer peripheral side in a plug radial direction.