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. 15, 2013
Filed:
Dec. 01, 2011
Hiroyuki Kameda, Aichi-ken, JP;
Hiroyuki Kameda, Aichi-ken, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A plasma jet ignition plug exhibiting high plasma generation efficiency while restraining occurrence of preignition. Prepresents the position of a rear end of a region of a metallic shell ledge, the region being in contact with an insulator. Prepresents the position of a rear end of a region of the insulator ledge, the region being in contact with the center electrode. Front end surfaces of the metallic shell, the insulator, and center electrode, an imaginary plane Swhich is perpendicular to the axis and contains position P, and an imaginary plane perpendicular to the axis and contains position Pare disposed in this order from front side to rear side along the axis. The axial distance A from the front end surface of the insulator to imaginary plane Sand axial distance B from the imaginary plane Sto imaginary plane Ssatisfy 0.5×A≦B.