Piston ring assembly for hydraulic mechanisms, particularly such mechanisms for very high operating pressures
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United States of America Patent
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Oct 16, 1984
Grant Date -
N/A
app pub date -
Jun 6, 1983
filing date -
Jun 4, 1982
priority date (Note) -
Expired
status (Latency Note)
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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.
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