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. 13, 1998
Filed:
Mar. 15, 1996
Ray William Atchinson, II, Grand Blanc, MI (US);
Dale Lavern Freed, Jr, Grand Blanc, MI (US);
John Franklin Mc Keon, Jr, Swartz Creek, MI (US);
Donald Robert Van Uum, Davison, MI (US);
Charles Dale Oakley, Lapeer, MI (US);
Gamdur Singh Mann, Grand Blanc, MI (US);
Keith Allen Penney, Davison, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
The invention includes a spark plug for a combustion engine including a center electrode having a tapered portion with a plurality of ridges formed thereon. The spark plug may also include a tapered, ground electrode positioned over the center of the center electrode. The tapered center and ground electrodes allow for flames to propagate freely from the spark gap into the combustion chamber and to ignite an air-fuel mixture in the chamber leading to smooth idle and faster starts.