Abstract: A hydraulic dashpot with a cylinder (1), a piston (4), and a bypass. The cylinder is charged with fluid. The piston partitions the cylinder into two compartments (7 & 8), travels back and forth therein on the end of a piston rod (2), and is provided with breaches and valves. The open cross-section of the bypass can be expanded and contracted and fixed in accordance with the direction the piston is traveling in, depending on whether the dashpot is in the compression or in the suction phase. The bypass is provided with an axially displaceable control component. One end of the control component comes to rest against a valve, its displacement being limited by stops. The bypass is accommodated in an axial bore through the piston rod. The bypass operates in conjunction with various outlets that open into the compartments. The control component is provided with at least one lateral flange and travels back and forth in at least one tube. The object is a smooth performance curve and low wear.

Abstract: A blow-off valve for a hydraulic dashpot comprising a fluid charged cylinder (1) and a piston (3) that travels back and forth therein on the end of a piston rod. The piston partitions the cylinder into two compartments (6 & 7) and is provided with breaches (4) and shock-absorbing valves. The piston rod (2) or an extension (8) thereof is hollow and accommodates operating components (13). The object is a valve that can be accommodated along with the hydraulic lines that serve it outside the piston rod or an extension thereof. The outer surface of the piston rod is accordingly provided with at least one axial inwardly undulating groove (14) at least as long as the piston, including its fastenings and operating components, is high. Alternatively, the bore that extends through the piston rod or its extension and its fastenings and operating components is provided with a similar radially outward groove that can be closed off at the compression end by a spring-loaded valve.

Abstract: A hydraulic dashpot with a cylinder (1), a piston (4), and a bypass. The cylinder is charged with fluid. The piston partitions the cylinder into two compartments (7& 8), travels back and forth therein on the end of a piston rod (2), and is provided with breaches and valves. The open cross-section of the bypass can be expanded and contracted and fixed in accordance with the direction the piston is traveling in, depending on whether the dashpot is in the compression or in the suction phase. The bypass is provided with an axially displaceable control component. One end of the control component comes to rest against a valve, its displacement being limited by stops. The bypass is accommodated in an axial bore through the piston rod. The bypass operates in conjunction with various outlets that open into the compartments. The control component is provided with at least one lateral flange and travels back and forth in at least one tube. The object is a smooth performance curve and low wear.

Abstract: A blow-off valve for a hydraulic dashpot comprising a fluid charged cylinder (1) and a piston (3) that travels back and forth therein on the end of a piston rod. The piston partitions the cylinder into two compartments (6 & 7) and is provided with breaches (4) and shock-absorbing valves. The piston rod (2) or an extension (8) thereof is hollow and accommodates operating components (13).