SEALING UNIT FOR PISTON Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: oil removing rings are received in the groove of the piston. The distance ring made up as flat wave- like spring having convex parts, which are bent out in the axial direction and in contact with inner sides of the oil removing rings, is interposed between the oil removing rings. One end of each of the oil removing rings is bent out stepwise. The first bent points in the direction of concavity of the distance ring and has the length that corresponds to the thickness of the oil removing ring. The second bent is directed parallel to the side walls of the piston groove. The third bent is made as a right corner and its length is equal to the magnitude of the concavity of the distance ring. EFFECT: enhanced reliability. 1 dwg