Patent ID: 6047627
Filing Date: 2000-04-11
Classification: F15B

Abstract:
A pressure medium driven device, comprising a cylinder having a cylinder tube; means forming a discharge outlet for a pressure medium; a piston movable in said cylinder over a stroke having a stroke end which is dampened by a counter pressure generated by throttling the pressure medium within a dampening area prior to its dissipation into said discharge outlet; a piston ring held between said piston and said cylinder in the dampening area and used as a throttle; a dampening sleeve provided in said cylinder for guiding said piston into an end position, said piston ring extending under the action of internal tension beyond a piston diameter and expanding to a maximum internal diameter of an internal cone, said dampening sleeve having said internal cone causing a progressive dampening, said piston ring having a slit with a minimal width in said cylinder tube, said dampening sleeve being provided in the dampening area with radial boreholes which duct the pressure medium into longitudinal slots from which it reaches said discharge outlet.