OIL SCRAPER RING
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United States of America Patent
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N/A
Issued Date -
Jun 19, 2014
app pub date -
May 30, 2012
filing date -
Jul 21, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An oil scraper ring, comprising a base body having a radially outer running surface, a radially inner circumferential surface, and an upper and a lower flank, the ring having at least two running surface lands, which are provided with a wear-resistant layer if needed and which, proceeding from the base body, are conically tapered at a predeterminable flank angle, radially in the direction of the ends thereof facing a counter running surface, forming limbs, and, proceeding from an oil chamber-side region, the free ends of the running surface lands being designed to be slanted at least in some regions in the direction of a combustion chamber-side region, wherein the respective transition regions from the slanted region of the running surface land into the limbs on the one hand, and from the limbs into the base body on the other hand, are rounded, the slanted region of the running surface land being operatively connected to a cylindrical section that extends in the direction of the oil chamber-side region, the radius of the scraping edge in the cylindrical section being 0.02 to 0.2 mm, the flank angle being ≦18°, and the width of the respective cylindrical section being <0.15 mm.
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