PISTON SEAL Russian patent published in 2001 - IPC

FIELD: mechanical engineering. SUBSTANCE: piston seal may be used for sealing of piston-cylinder pairs of internal combustion engines. Seal has piston which groove houses two flat split compression rings, upper and lower ones. Rings are shifted one relative to the other so that distance between one-sided end of upper ring and one-sided end of lower ring equals rated length of 1. Said length corresponds to half the period of wave oscillations of ring ends. Round catch with upper and lower lugs is positioned in piston groove. Lugs enter slots of locks of upper and lower rings, respectively, thus providing for preset distance 1. EFFECT: enhanced reliability, extended service life. 4 dwg