Patent ID: 7901174

Claim:
A loading and unloading device for transferring cargo between a vehicle having a chassis and a cab, and a loading ramp of varying height, capable of receiving and dispatching cargo, the loading and unloading device comprising: a tilt frame pivotally engaged to the vehicle chassis, the tilt frame having a first end near the cab of the vehicle and a second end distal from the cab; and a transfer bed, capable of adjusting to varying heights, the transfer bed comprising: a first end adjacent to the tilt frame and a second end adjacent to the loading ramp; the first end of the transfer bed movable along an upper surface of the tilt frame; and an adjustable height carriage configured to support a second end of the transfer bed; wherein the transfer bed may be leveled at varying heights without changing the height of the vehicle chassis by varying both the height of the carriage and the height of the first end of the transfer bed by moving it along the tilt frame.