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:
Sep. 04, 2001
Filed:
Jan. 11, 2000
Charles T. Fleetwood, Easley, SC (US);
Michael A. Runge, Piedmont, SC (US);
Federal-Mogul World Wide, Inc., Southfield, MI (US);
Abstract
Igniter and spark plugs according to the invention include a tubular insulator having an axially extending passage and axially opposed sealing shoulders within the passage spaced from the ends of the insulator. A multi-part electrode assembly is disposed within the insulator, including an upper electrode joined by resistance welding to a lower electrode. A heat-expandable sleeve is carried about the upper electrode and a lower end thereof confronts a compressible gasket and the upper sealing shoulder. An enlarged head of the lower electrode confronts a sealing gasket on the lower sealing shoulder. During resistance welding, the upper and lower electrodes are displaced toward one another causing the gaskets to be compressed against the sealing shoulders of the insulator to form a gas-tight seal therebetween.