CPC F16J 9/06 (2013.01) | 8 Claims |
1. A three-part oil scraper ring assembly, comprising:
an upper scraper ring,
a lower scraper ring, and
an MF expander spring,
wherein the upper scraper ring has an outer running surface with axial profile consisting of upper and lower segments defined by part-circular lines extending from upper and lower flanks of the upper scraper ring and each having a predetermined radius and connected by an intermediate segment defined by a straight line, and
wherein the lower scraper ring has an outer running surface with an axial profile consisting of upper and lower segments defined by two straight lines extending from upper and lower flanks of the lower scraper ring and connected by an intermediate segment defined by a part-circular line.
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