Importance

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Abstract

A sealing device for a piston of the type which is rigidly connected with the associated piston rod and which is adapted in a reciprocatory motion within an enclosing cylinder to be inclinable a small angle with its longitudinal axis relative the center axis of the cylinder, said piston being intended for use in hydraulic mechanisms, particularly such mechanisms having high hydraulic fluid pressures, is adapted to provide a seal between the cylinder wall and the piston and piston rod assembly and to comprise a plurality of metal sealing rings. In order to provide a more efficient and enduring sealing device which still is simpler less expensive in manufacture, it is suggested according to the invention that the sealing rings consist of three or more annular and radially slitted washers of sheet metal, said washers being arranged radially slidable in a common circumferential groove in the cylinder wall adjacent the piston rod end thereof for self-adjustment with its inner edge surface into sealing engagement with the outer peripheral surface of the piston and piston rod assembly according to the varying inclined position of said assembly.

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First Claim