Patent ID: 6581306
Filing Date: 2003-06-24
Classification: E01H

Abstract:
A lift device mounted on a vehicle for raising, lowering and suspending a vertically movable assembly mounted on the vehicle, comprising:a primary lift arm in pivotal relation to the vehicle and having a distal end disposed generally above the assembly; a secondary lift arm is disposed on the lift device in pivotal relation to said primary lift arm and having a free end; a hanging mechanism securing said assembly to said free end to suspend said assembly from said free end; a positioning mechanism connected to the vehicle and for raising and lowering said primary lift arm to raise and lower the assembly and to suspend the assembly off of the ground on which the vehicle travels; and a resilient member attenuating resultant forces originating at said assembly and transmitted from said secondary lift arm to said primary lift arm, said resilient member being disposed at the location where said forces are transmitted from said secondary-lift arm to said primary lift arm, said resilient member absorbing said forces transmitted from said secondary lift arm and toward said primary lift arm preventing transmission of said forces to said vehicle.