Importance

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Abstract

A damping device in pressurized fluid cylinders, especially in hydraulic cylinders, for end position damping of the piston stroke. The device comprises a closure member connected to the piston and adapted to enter during a damping process into an outlet opening in front of the piston. A ring, serving as a non-return valve, is arranged with an axial play in an annular groove so as to choke the flow of pressurized fluid through the annular passage between the wall defining the outlet opening and the closure member, while permitting a fluid flow in the opposite direction during the return stroke of the piston. According to the invention, the ring has a cross-section permitting at least a radial deformation, and circumferentially distributed by-pass openings located in the region of the inside of the annular groove so as to permit said fluid flow during the return stroke of the piston.

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First Claim