Abstract: The present invention relates to an oil sealing ring, especially that used in piston of internal combustion engine or compressor. This oil sealing ring comprises a base ring (2) with a split. An elastic ring (3) is provided in the inner circumference surface of the base ring. A radially outward annular flange (18) is provided in the outer circumference surface of the base ring. An axially upward annular projecting part (19) is provided in the area beyond the outer circumference surface of the projecting part (19). The splits of said disc ring (1) and said base ring (2) are respectively staggered from each other. This oil sealing ring can effectively prevent the leakage of the oil and the gas.

Abstract: A sealing ring assembly for installation in a single sealing ring groove of a piston that is for use in an internal combustion engine, hydraulic cylinder piston, or the like, and replaces the top and second ring seals as are presently utilized, which sealing ring assembly is for curtailing leakage between the piston outer surface and surface of a cylinder containing the piston. The sealing ring assembly consists of a first, primary or main ring that is for fitting in a piston sealing ring groove and is cut back along top and bottom surfaces to provide slots that are each receive a flat rail fitted therein, with the assembly to be contained within the sealing ring groove. The sealing ring assembly can be manufactured in various widths from one quarter (1/4) inch to one (1) millimeter, and the first, primary or main ring preferably has an end gap cut formed at a ninety (90) degree angle thereacross, and the rails preferably each have an end gap cut formed at a forty-five (45) degree angle thereacross.