Oil ring assembly
Oil ring assembly
Oil ring assembly
Oil ring assembly
Oil ring assembly with annular expander spring
Oil ring design
Oil ring structure having reduced rigidity
Oil ring with coil expander
Oil scavenge check valve apparatus
Oil scraper
Oil scraper piston ring assembly
Oil scraper piston ring with elliptical oil vent holes
Oil scraper ring with controlled gap arrangement
Oil seal
Oil seal
Oil seal
Oil seal
Oil seal and unitized seal carrier for reciprocating shaft
Oil seal apparatus
Oil seal assembly