Spark plug, spark plug gasket, and manufacturing method thereof
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United States of America Patent
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Jan 8, 2019
Grant Date -
Feb 1, 2018
app pub date -
Jul 27, 2017
filing date -
Jul 28, 2016
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An angular gasket for a spark plug used for mounting a spark plug to a wall of a combustion engine. The gasket provided with a first section with predetermined thickness, having a plurality of concave portions provided as grooves intermittently disposed along a circumferential direction on a first surface being a wall section of the gasket, at an inner circumferential edge thereof. The gasket further provided with convex portions on a section of the inner radial side, with respect to the concave portions projecting toward the inner radial side thereof, at the inner circumferential edge, and a second section being thinner than the a thickest part of the gasket, and greater in thickness than the first section, disposed between the plurality of concave portions of the inner circumferential edge surface.
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