DRAFT GEAR Russian patent published in 2003 - IPC

FIELD: transport engineering. SUBSTANCE: invention is designed for absorbing and dissipating energy of shocks in vehicle couplers. Proposed draft gear has cylinder with piston provided with two-sided rod installed in cylinder to provided overflow of working fluid. One part of rod is installed in cylinder bottom, and other part, in intermediate support. Additional rod is installed in inner space of piston rod part fitted in intermediate support. Additional rod has seal and bead for contact with ring stop made in intermediate support. Inner space of main rod communicates with atmosphere. Proposed design of draft gear provides low upsetting force on initial section of piston stroke with subsequently intensive rose of force to required high static force at end of stroke. EFFECT: improved absorbing of shocks. 1 dwg