Patent ID: 6119832
Filing Date: 2000-09-19
Classification: E05F,E05Y,F16F,Y10T

Abstract:
A pneumatic movement damper includes a cylinder closed on one end, a piston which slides within the cylinder and which is connected to a piston rod, a packing mounted on the piston and a throttle passage provided on the piston for connecting two cylinder spaces separated by the piston and the packing, wherein the piston includes a conical seat widening out from the piston rod and a flange part adjacent to the largest diameter of said conical seat, the packing having a truncated recess corresponding to the conical seat and movable within limits in an axial direction between the flange part and an annular flange arranged on the piston rod at an axial distance from the flange part, radial grooves are provided in surfaces of the flange part and the annular flange, said surfaces extending perpendicular to the axis of the cylinder and oriented towards the packing, and at least one of the radial grooves provided in the flange part having a smaller cross-section than the groove arranged in the annular flange, the at least one groove in the flange part forming the throttle passage and a flow passage is provided between the conical seat and the recess.