PISTON RINGS
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United States of America Patent
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N/A
Issued Date -
Sep 13, 2007
app pub date -
Jan 29, 2005
filing date -
Mar 26, 2004
priority date (Note) -
Abandoned
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Abstract
The invention relates to a piston ring which has at least one bearing surface and an upper and a lower flank. The bearing surface is provided with a High Velocity Oxygen Fuel (HVOF) coating which has a surface roughness Rk<0.1 .mu.m.
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