Spark plug having a plastic upper insulator and method of construction
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United States of America Patent
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Mar 25, 2014
Issued Date -
N/A
app pub date -
Oct 19, 2009
filing date -
Oct 20, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A spark plug and method of construction thereof is provided. The spark plug includes a metal shell having a through cavity, a lower insulator and a plastic upper insulator. The lower insulator is received in the through cavity and has a through passage with a center electrode received therein. A ground electrode is operatively attached to the shell in spaced relation from the ground electrode to provide a spark gap. The plastic upper insulator has a distal end received in the through cavity of the shell and a terminal end extending axially outwardly from the shell. The upper insulator has a through passage extending between the terminal end and the distal end. An elongate conductive member is received in the through passage of the upper insulator and is configured for electrical communication with the center electrode.
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