Spark plug with receiving end of ground elbow set above discharge terminal of central electrode and located by one side of central electrode extension line
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United States of America Patent
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-
Sep 25, 2012
Grant Date -
May 19, 2011
app pub date -
Oct 6, 2010
filing date -
Nov 16, 2009
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A spark plug include an insulator, a central electrode, which is in the form of a bar received in the insulator, a metal case, which surrounds the insulator and is grounded, and a ground elbow fixed to the metal case. The central electrode includes a discharge terminal exposed outside the insulator and defining an extension line as an imaginary line extending from the discharge terminal along a central axis of the central electrode. The ground elbow has a connection end and an opposite, sharp-tip-like receiving end. The connection end is fixed to the metal case. The receiving end is set close to but spaced from the discharge terminal and is locate by one side of the extension line.
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