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:
Oct. 20, 2015
Filed:
Jan. 17, 2013
Applicant:
Denso Corporation, Kariya, Aichi-pref., JP;
Inventors:
Takanobu Aochi, Nishio, JP;
Masamichi Shibata, Toyota, JP;
Assignee:
DENSO CORPORATION, Kariya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01T 13/20 (2006.01); H01T 13/32 (2006.01);
U.S. Cl.
CPC ...
H01T 13/20 (2013.01); H01T 13/32 (2013.01);
Abstract
The spark plug for an internal combustion engine has a cylindrical housing, a center electrode held inside the housing, a ground electrode connected to the housing and forming a spark discharge gap between itself and the center electrode, and, an end projection projected from the end portion of the housing toward the head end side of the spark plug. The center electrode and ground electrode are arranged so that most of the spark discharge gap is disposed over the open areas and the electrode area in which the end projection is arranged.