Trailers with power transfer system

Claim 1

A trailer to be coupled in train to others for moving cargo boxes, pallets and the like, substantially at ground level, and drawn by a drive vehicle provided with a single power source for the trailers, each of said trailers including a chassis formed with a frame, running wheels journaled on the chassis, coupling means at opposite ends for joining the trailers in train, a rectangular platform formed with transverse and longitudinal beams rigidly secured together, cargo conveyor rollers journaled at their ends between said longitudinal beams, interconnecting drive means between the several rollers so that driving torque applied to one roller will impart conjoint rotation to all so that cargo can be moved throughout the length of the train, a flexible shaft structure to be driven by a power source in the drive vehicle and extending the length of each trailer with coupling means for adjoining shaft structures between the trailers, a gear box pivoted on a longitudinal axis on the chassis, stub shafts journaled in the gear box independently driven by said flexible shaft structure so as to provide opposite rotation thereof, a friction wheel fast on each stub shaft, each being engageable with a roller when either side of the gear box is tilted upwardly and a king pin pivotally joining the chassis and platform, permitting rotation of the latter to provide a cargo turntable so that cargo can be removed or added from the side of the train by rotating the platform about 90*.