Anti-fouling spark plug and method of making
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United States of America Patent
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May 24, 2016
Grant Date -
May 15, 2014
app pub date -
Jan 16, 2014
filing date -
May 26, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A spark plug is provided. The spark plug has an insulative sleeve with a central axial bore and an exterior surface of a shaped tip portion. A coating is disposed on the exterior surface of the shaped tip portion and the coating comprises a transition metal compound or a combination of transition metal compounds, and an alkali metal compound. A center electrode extends through the central axial bore of the insulative sleeve. A metal sleeve is provided, wherein the insulating sleeve is positioned within, and secured to the metal shell. A ground electrode is coupled to the metal shell and positioned in a spaced relationship relative to the center electrode so as to define a spark gap.
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