Material handling equipment operator's cab mounting

Claim 1

In material handling equipment, the combination comprising a carrier, a machinery platform being mounted upon the carrier for rotation in a generally horizontal plane about a substantially vertical axis, an elevating mechanism being attached to the machinery platform at a location offset from the axis of rotation of the platform, and an operator's cab being supported by the elevating mechanism to move vertically between a level where overhead clearance above the cab is provided for transport and various elevated levels thereabove where the operator has unobstructed visibility of the work, said elevating mechanism further including a support frame, a pair of hydraulic cylinders being mounted within the support frame and having actuating arms extending upwardly therefrom, a support bracket being attached to the upper rear portion of the operator's cab and being supported by the actuating arms of the hydraulic cylinders adjacent one side of said support frame, and at least one pair of guide brackets projecting rearwardly from the lower portion of the operator's cab, each guide bracket encircling in a horizontal plane the outside circular surface of a respective one of said hydraulic cylinders to bear laterally against the cylinder surface in response to horizontal forces on the bracket existing between said operator's cab and said cylinder and to slide vertically along the cylinder in response to vertical forces on the bracket.