REDUCED FRICTION OIL CONTROL PISTON RINGS
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United States of America Patent
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Aug 27, 2015
app pub date -
Sep 24, 2013
filing date -
Sep 28, 2012
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Abstract
Improved oil control piston rings with reduced friction compared to prior art rings are disclosed for use in liquid lubricated internal combustion engines, gas pumps, and gas compressors. The ring assemblies are interchangeable with conventional oil control rings and offer similar oil control performance. Like conventional oil control rings, they include a spring action expander that loads circular steel scraper rails against the cylinder bore to form a sliding barrier between the oil-filled crankcase and the combustion chamber and pressure sealing piston rings. Unlike conventional rings, the improved ring assemblies utilize means of supporting thinner scraper rails that form the sliding barrier with less contact force and resulting friction.
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