Patent ID: 6481331
Filing Date: 2002-11-19
Classification: F15B

Abstract:
A pressure medium-actuated working cylinder with a piston (20) to which a piston rod (35) is fixed and which is axially displaceable between two end positions in a cylinder space, with opposite changes in the volumes of two cylinder chambers (21, 22) on its two sides, with a damping element (40) arranged on one side of the piston (20), having a rotationally symmetrical outer surface (50) with surface sections (51, 52, 53, 54, 55) of different diameters, entering a passage aperture (25, 28) between one of said cylinder chambers (21, 22) and a cylinder connection (23, 26) when the piston (20) runs into one end position, and so forming, with the passage aperture (25, 28), an annular throttle gap for the throttled outflow of pressure medium from the cylinder chamber (21, 22) to the cylinder connection (23, 26), wherein the outer surface (50) of the damping element (40) in an area serving to form the throttle gap is so shaped that, viewed with the damping element (40) entirely inserted, it has a maximum diameter at the beginning of the passage aperture (25, 28) at the chamber end, and, after a surface section (52) of a small diameter or small diameters with the damping element (40) inserted to a considerable extent, has, over a short stretch, a middle diameter which lies between the maximum diameter and the small diameter, wherein the outer surface (50) of the damping element (40) has a first surface section (51) with a fixed large diameter and extending over a certain axial distance, a second surface section (52) with a fixed small diameter and extending over a certain axial distance, and a third surface section (53) with a fixed middle diameter and extending over a certain axial distance.