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. 19, 2023
Filed:
Nov. 08, 2022
Applicant:
Denso Corporation, Kariya, JP;
Inventor:
Satoshi Hara, Kariya, JP;
Assignee:
DENSO CORPORATION, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01T 13/39 (2006.01);
U.S. Cl.
CPC ...
H01T 13/39 (2013.01);
Abstract
A spark plug includes a first discharge chip and a second discharge chip facing the first discharge chip to define a spark gap therebetween. The spark gap has a size or distance between the first and second discharge chips which is 0.23 mm or more and 0.6 mm or less. At least one of the first and second discharge chips is made from material mainly containing iridium or platinum and an additive of tantalum of 0.5 Wt % to 5.0 Wt %. This minimizes a risk that a portion of the first or second discharge chip may be separated or such a separated portion may be redeposited on the first or second discharge portion.