US Patent 8060958 Powered person lift and transport apparatus

A powered lift apparatus for lifting and transporting a human body above a ground surface is disclosed, and comprises a base, a mast extending upwardly from the base, and a crane member pivotally mounted on the mast and movable with respect to the base. The apparatus further comprises a hydraulic drive mechanism configured to move the base over the surface and a hydraulic lifting mechanism configured to move the crane member with respect to the base. The apparatus also comprises a single hydraulic power source assembly connected to and powering both the hydraulic drive mechanism and the hydraulic lifting mechanism. The hydraulic power source assembly includes a control assembly configured to direct hydraulic power from the hydraulic power source assembly to the hydraulic drive mechanism and hydraulic lifting mechanism under user control.