Abstract: An elongated trailer has a front neck for connection to the fifth wheel apparatus associated with a suitable tractor. The bed has a lowered, intermediate load portion disposed approximately in the trailer middle. A hydraulic ram raises or lowers the tiltable trailer which is suitably journalled for rotation at its mounting point. A pivoted cover atop the cargo bed can be shifted between open cargo-loading positions and closed cargo-hauling positions by hydraulic cylinders when unlocked. Slidable, hydraulically actuated locking tracks on each side of the top parallel with the cover support latches that can be shifted into or out of engagement with rigid tangs projecting from sides of the cover to forcibly clamp the cover shut. Hydraulic controls accessible from the ground control the apparatus.

Abstract: An elongated trailer has a front neck for connection to the fifth wheel apparatus associated with a suitable tractor. The bed has a lowered, intermediate load portion disposed approximately in the trailer middle. A hydraulic ram raises or lowers the tiltable trailer which is suitably journalled for rotation at its mounting point. A pivoted cover atop the cargo bed can be shifted between open cargo-loading positions and closed cargo-hauling positions by hydraulic cylinders when unlocked. Slidable, hydraulically actuated locking tracks on each side of the top parallel with the cover support latches that can be shifted into or out of engagement with rigid tangs projecting from sides of the cover to forcibly clamp the cover shut. Hydraulic controls accessible from the ground control the apparatus.