Importance

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Abstract

A truck having a truck body is adapted to tow a trailer having a body disposed on a track. The truck body is tiltable to dump a load. A tailgate in the truck body is liftable after the load dumping. At its forward end, the trailer has a horn movable into mating holes in the truck after the dumping of the load from the truck body. A sprocket chain in a closed loop on the trailer track includes rollers which rotate on the track to move the trailer body in a direction into, and out of, the truck body. Pins in pairs of dog links extend through individual rollers to have the dog links move with the sprocket chains. Dogs on the dog links engage a hook coupled to the trailer body. The links are disposed so that the dogs on one link engages the hook to move the trailer body into the truck body and the dog on the other link engages the hook to move the trailer body out of the truck body. Actually, pairs of dog links may be provided to engage pairs of hooks, one pair of dog links being on one side of the sprockets (disposed laterally at a median position) and the other pair of dog links being on the other side of the sprockets. The sprockets may be driven by a hydraulic motor connected in a hydraulic circuit to provide a controlled downward movement of the trailer body when the truck and the trailer are on an incline. With the trailer body in the truck body, the truck and trailer bodies may be tilted to dump the load in the trailer body.

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First Claim