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. 02, 2010
Filed:
Mar. 07, 2008
Richard E. Callahan, Maumee, OH (US);
Robert D. Freeman, Monclova, OH (US);
Richard E. Callahan, Maumee, OH (US);
Robert D. Freeman, Monclova, OH (US);
Federal-Mogul Ignition Company, Southfield, MI (US);
Abstract
A spark plug assembly () for engine applications where the combustion chamber is difficult to access when servicing or replacing a spark plug. The spark plug assembly () includes a fairly traditional spark plug component () to which an elongated tubular conduit () is attached, such as by welding, to a portion of the metallic shell (). The conduit () contains an upper ceramic insulator () adjacent its top end () disposed in end-to-end abutting contact with an outer elastomeric insulator (). The ceramic insulator of the spark plug component (), herein referred to as a lower ceramic insulator (), is surrounded by the outer elastomeric insulator () and held securely within the conduit () thereby. An inner elastomeric insulator () is disposed in a continuous passageway formed between aligned central bores formed in the respective upper ceramic () and outer elastomeric () insulators. The inner elastomeric insulator () supports and further electrically isolates an elongated electrically conductive center electrode extension () that is in direct electrical conductivity with the center electrode () of the spark plug component (). An ignition lead wire makes electrical contact with the center electrode extension () and thereby delivers electrical energy at timed intervals to the spark gap.