Electric lamp and discharge devices – Spark plugs – With specific joint structure
Reexamination Certificate
2011-05-17
2011-05-17
Hines, Anne M (Department: 2879)
Electric lamp and discharge devices
Spark plugs
With specific joint structure
C313S118000, C313S143000, C123S1690EB, C123S1690EL, C445S007000
Reexamination Certificate
active
07944135
ABSTRACT:
A spark plug and method of construction is provided, wherein the spark plug has a generally annular ceramic insulator and a metal shell surrounding at least a portion of the insulator. A ground electrode is operatively attached to the shell, wherein the ground electrode has a ground electrode sparking surface. The spark plug further includes a center electrode having an elongate body with a center electrode sparking surface. The sparking surface of the center electrode and the ground electrode sparking surface provide a spark gap. A brazed joint bonds at least one of the insulator to the shell or the center electrode to the insulator.
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Dickinson Wright PLLC
Federal-Mogul Ignition Company
Green Tracie
Hines Anne M
Stearns Robert L.
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