Patent ID: 6986414

Claim:
A hydraulic dashpot comprising: a cylinder with fluid therein; a single piston and a bypass, said piston dividing said cylinder into two chambers; a piston rod having an end connected to said piston said piston traveling back and forth in said cylinder; said piston having ducts and valves; said bypass having an open cross-section expandable and contractable and fixed in the traveling direction of said piston depending on whether the dashpot is in a compression phase or in a suction phase, the bypass cross-section for the flow in the suction direction of the piston rod and the cross-section of the bypass in the compression direction being fixedly settable independent of each other through bypass-adjustment means; said bypass having an axially displaceable control component with one end resting against a valve; stops for limiting displacements of said control component; said piston rod having an axial bore holding said bypass, said bypass operating in conjunction with outlets opening into said chambers; said control component having at least one lateral flange traveling back and forth in at least one tube; said control component comprising a plurality of parts with at least two bypass control caps axially traveling to stationary stops; axially variable components operating in conjunction with said caps to form a port determining the size of the cross-section opening in both the compression phase and the suction phase; and spring means for holding apart axially said bypass-control caps.