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:
Jun. 12, 2012
Filed:
Mar. 02, 2011
Hiroyuki Kameda, Aichi-ken, JP;
Yoshikuni Sato, Nagoya, JP;
Daisuke Nakano, Kiyosu, JP;
Naofumi Yamamura, Nagoya, JP;
Daisuke Kasahara, Toyoake, JP;
Hiroyuki Kameda, Aichi-ken, JP;
Yoshikuni Sato, Nagoya, JP;
Daisuke Nakano, Kiyosu, JP;
Naofumi Yamamura, Nagoya, JP;
Daisuke Kasahara, Toyoake, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A plasma jet ignition plug including an insulator having an axial hole extending therethrough in the direction of an axis CL, a center electrode inserted into the axial hole, and a ground electrode disposed frontward of the front end of the insulator. The insulator has a cavity defined by the wall surface of the axial hole and the front end surface of the center electrode and opens frontward. The ground electrode has a through hole for establishing communication between the cavity and an ambient atmosphere. A front end portion of the center electrode is formed into a taper portion whose diameter reduces frontward in the direction of the axis CL. The outside diameter of a front end of the taper portion is smaller than the diameter of the through hole. The cavity has a substantially constant diameter with respect to the direction of the axis CL