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. 06, 1998
Filed:
Jan. 24, 1996
Gunter Bolduan, Langen, DE;
Dittmar Klett, Pleidelsheim, DE;
Jurgen Wurth, Heilbronn, DE;
Oswald Glaser, Beuren, DE;
Hermann Kersting, Ludwigsburg, DE;
Roland Muller, Murr, DE;
General Motors Corporation, Detroit, MI (US);
Abstract
A spark plug for an internal combustion engine comprising: a cylindrical metal tube; a rod-shaped central electrode within the cylindrical metal tube; a tubular insulator within which the rod-shaped central electrode is located, wherein the tubular insulator is arranged substantially centrally in and substantially coaxially with the cylindrical metal tube; and at least two ground electrodes affixed to the cylindrical metal tube, wherein the at least two ground electrodes are each bent toward the metal electrode, wherein each ground electrode together with the central electrode forms a different member of a set of spark paths comprising: (i) an air sliding spark path, (ii) and air-air sliding spark path and (iii) an air spark path.