PISTON RING FOR AN INTERNAL COMBUSTION ENGINE
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United States of America Patent
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Issued Date -
Sep 8, 2011
app pub date -
Oct 12, 2009
filing date -
Nov 15, 2008
priority date (Note) -
Abandoned
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Abstract
Piston ring for an internal combustion engine, comprising a running surface, and upper and a lower flank surface and an inner circumferential surface, wherein at least one of said surfaces is provided with at least one marking which is formed in the manner of a matrix, characterized in that the surface region which contains the marking is of brighter configuration in order to produce a background surface for the matrix than the surface regions of the piston ring which immediately adjoin in at least outside the matrix.
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