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:
Dec. 12, 2006
Filed:
Sep. 25, 2002
Alessandro Pino, Boughton, GB;
John Anthony Burrows, Northwich, GB;
Alessandro Pino, Boughton, GB;
John Anthony Burrows, Northwich, GB;
Federal-Mogul Ignition (UK) Limited, Merseyside, GB;
Abstract
A spark plug comprises an electrically-insulating sleeve () extending along a central axis () of the plug, a first electrode () having a tip (), an electrically-conducting shell (), and a second electrode () mounted on the shell, the second electrode having a tip (). The tips (and) have spark surfaces () which define a spark gap () of the plug. The spark surfaces () are inclined at different angles (θ1, θ2) relative to a plane () extending normally of said central axis () of the plug so that said spark gap () varies in width along the length of the gap with the narrowest point (X1) of the gap being further from the connection between the second electrode () and the shell () than the other end of the gap.