Piston ring assembly for hydraulic mechanisms, particularly such

Details Piston ring assembly for hydraulic mechanisms, particularly such Piston ring assembly for hydraulic mechanisms, particularly such

1983-06-06

1984-10-16

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 53, 277 83, 277216, 277236, F16J 916, F16J 1544

Patent

active

044770901

ABSTRACT:
A piston ring assembly for a piston of the type which is rigidly connected to the associated piston rod and which during its reciprocating motion in a cylinder has to be inclinable with its longitudinal axis by a small angle relative to the center axis of said cylinder, said piston being intended for use in hydraulic mechanisms with very high hydraulic fluid pressures and mainly axial piston machines. The piston is provided with a peripheral groove for accomodating the sealing piston ring assembly and said assembly consists of two or more annular and radially slitted washers of steel. For providing such a piston ring assembly which has improved sealing action and endurance but which still is simple and unexpensive in manufacture, the slitted washers have a thickness so selected in percent of the cylinder diameter that their slit width or gap will be substantially equal to zero for an intermediate value of the inclination angle between the longitudinal axis of the piston and the center axis of the cylinder and in that the piston groove has a depth sufficient for allowing a free relative sliding motion between the washers.

REFERENCES:
patent: 2585952 (1952-02-01), Marien
patent: 2871072 (1959-01-01), Parks et al.
patent: 2956845 (1960-10-01), Wahlmark
patent: 3460842 (1969-08-01), Pointer et al.
patent: 3869131 (1975-03-01), Derner

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