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:
Aug. 07, 2012
Filed:
Sep. 22, 2011
Naofumi Yamamura, Nagoya, JP;
Hiroyuki Kameda, Aichi-ken, JP;
Daisuke Nakano, Kiyosu, JP;
Daisuke Kasahara, Toyoake, JP;
Naofumi Yamamura, Nagoya, JP;
Hiroyuki Kameda, Aichi-ken, JP;
Daisuke Nakano, Kiyosu, JP;
Daisuke Kasahara, Toyoake, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A plasma jet ignition plug that reliably prevents current leakage with restraint on variation in the position of a ground electrode relative to an insulator and on overheat of the ground electrode, for stable generation of plasma. The plug includes an insulator having an axial bore extending in the direction of an axis CL, a center electrode inserted in the axial bore, a metallic shell disposed externally of the outer circumference of the insulator, and a ground electrode fixed to the metallic shell, and has a cavity defined by the wall surface of the axial bore and the front end surface of the center electrode. Supports intervene between the insulator and the ground electrode. A space formed radially outward of the supports and a space formed radially inward of the support communicate with each other.