Abstract: A multistage portable lift has an arm projecting rearwardly from one of the movable lift stages and a reeving system including a cable transferring a downward counterbalancing force to the arm from a load at the front of the lift. In the preferred embodiment, the load support is caused to moved upwardly to the upper end of the top stage before the movable stages move relative to one another responsive to upward movement of the lowermost movable stage by an independent elevating means.

Abstract: A multi-stage extensible tower on a wheeled base with a platform at the top has an extensible multi-sectioned ladder which slopes downwardly uniformly from the platform when the tower and ladder are in extended position. When the tower and ladder are in lowered, retracted position, the ladder sections have different slopes from one another. Outriggers are provided on the base which have a retracted position preventing extension of the tower. The platform has a fence which can be swung down level with the platform for conditions of reduced overhead clearance while the unit is being moved.

Abstract: A portable multi-stage lift has a winch-operated reeving system operable from ground level or from the lift carriage. The stages of the lift mast slidingly interfit front to back and each has the same cross-section shaped to be formed of a single extrusion. Provision is made for automatically locking the lift stages and carriage together if the cable in the reeving system were to fail.