Patent ID: 6793047
Filing Date: 2004-09-21
Classification: F16F

Abstract:
A hydraulic dashpot comprising: a piston with ports and valves; a cylinder charged with shock-absorbing fluid; said piston traveling into and out of said cylinder and dividing said cylinder into two chambers; a piston rod having a central bore and having an end mounting said piston; an adjustable bypass inside said piston rod and having radial outlets through said piston rod, said bypass having a cross-section during a suction phase, said cross-section during the suction phase being also independent of the cross-section during the compression phase; two valves in said end of said piston rod; a rotating plunger with a rotary connection for each of said valves, and operating in conjunction with one of said outlets; an axially displaceable control rod with two ends and a rotary connection at at least one of said ends inside said bore extending through said piston rod and being connectable to the plunger.