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:
Nov. 11, 2008
Filed:
Aug. 04, 2004
Hiroshi Yorita, Kariya, JP;
Shinichi Okabe, Aichi-ken, JP;
Hitoshi Morita, Aichi-ken, JP;
Tsunenobu Hori, Kariya, JP;
Hiroshi Yorita, Kariya, JP;
Shinichi Okabe, Aichi-ken, JP;
Hitoshi Morita, Aichi-ken, JP;
Tsunenobu Hori, Kariya, JP;
DENSO Corporation, , JP;
Nippon Soken, Inc., , JP;
Abstract
A small-sized spark plug is provided which ensures the stability in the location of production of sparks between center and ground electrodes. The center and ground electrodes have joined thereon cylindrical members such as noble metal chips which are opposed to each other through a spark gap. The cylindrical members are so oriented to have longitudinal center lines extend parallel in misalignment with each other. This orientation results in shorter and longer intervals between end surfaces of the cylindrical members. The sparks are concentrated between portions of edges of cylindrical members located apart the shorter interval, thereby resulting in the stability in the location of production of the sparks.