Patent ID: 6662914
Filing Date: 2003-12-16
Classification: F16F

Abstract:
A hydraulic dashpot comprising: a cylinder filled with shock-absorbing fluid, with; a piston mounted on an end of a piston rod and traveling back and forth inside said cylinder and separating said cylinder into two compartments; ports and shock-absorption valves, and; a variable bypass system in an axial bore in said piston rod with lateral radial openings extending through said rod said bypass system having a cross-section available for the fluid to flow through as the piston rod travels in a direction associated with a suction phase and the cross-section of the bypass system available for the fluid to flow through as the piston rod travels in a direction associated with a compression phase can be fixedly established independently of each other, said bypass system having an axially moving control tube with one end coming to rest against one of said valves and with another end coming to rest against another of said valves and stops for limiting axial motion of said control tube.