Abstract: A transverse beam is disposed between and pivotally connected to the rear ends of a pair of load-receiving frame members on a tractor truck. An elongated housing is secured to and depends from the transverse beam. A sleeve is slidably mounted on the housing. A hydraulically actuated ram is mounted in the housing and is operatively connected to the sleeve. A pair of relatively spaced apart elevator arms are pivotally connected at one of their ends to the truck frame members and at intermediate positions to opposite sides of the sleeve, and a hitch mechanism is secured to the ends of the elevator arms outwardly of the sleeve. The hitch mechanism includes a central rotatable portion provided with a ring-shaped hitch and a separable latch projecting outwardly in opposite directions.

Abstract: A generally U-shaped frame is formed with a pair of elongated beams, each having a pair of pivotally mounted load-engaging dogs, and with a pair of elongated sleeves, each extending upwardly from the free end of one of the beams. An elongated post is slidably and telescopically mounted in each of the sleeve. Each post is mounted on a wheel-supporting carriage. A hydraulic jack is mounted in each of the telescoping post and sleeve assemblies to raise and lower the frame relative to the base assemblies. Hydraulic motors and lines are provided so that the dogs can be pivoted and the frame raised and lowered by the operator of a fork lift which is attached to a hitch extending from the closed end of the frame.

Abstract: Two elongated beams project forwardly and two project rearwardly from a central base portion. The pairs of beams are closer together at their front and rear ends than at the central base portion. Front and rear arms are mounted at opposite ends of the beams for limited rotational movement relative thereto. The cargo consists of a pair of prefabricated building modules, one of which is mounted on the front beams and arm, and the other on the rear beams and arm. When subjected to torsional forces, the front and rear ends of the beams can twist relative to the longitudinal axis of the semitrailer while the front and rear arms remain substantially aligned with the central base portion.