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:
Nov. 11, 2003
Filed:
Mar. 08, 2002
Simone Girlando, Cognento, IT;
Stefano Vignoli, Gargallo di Carpi, IT;
Sandro Goretti, Campogalliano, IT;
Federal-Mogul Ignition Srl, Milan, IT;
Abstract
A glow plug ( ) that includes a metal tubular body ( ), a metal sheath ( ) carried by the tubular body, a heating resistor ( ) located inside the sheath, first and second electrical terminals ( ), and a layer ( ) of insulating material applied on a portion of the outer surface of the sheath. The first terminal ( ) is electrically connected to the heating resistor ( ) and the second terminal ( ) is electrically connected to the sheath ( ). The layer ( ) of insulating material is located on the sheath ( ) between the sheath and tubular body ( ) to thereby electrically insulate the metal sheath from the metal tubular body. The layer ( ) of insulating material can be applied by plasma deposition which enables the sheath ( ) to be attached to the tubular body ( ) by an interference fit of the sheath within a cavity ( ) in the tubular portion. Also disclosed is a method of fabricating the glow plug ( ).