Abstract: A drive-through adjustable hood assembly for enclosing a transit mix cement truck during the filling of dry material so as to contain and capture dust and particulate matter. The adjustable hood assembly is mounted on an expanding and retracting frame system. Entrance and exhaust ports are provided in the hood so that a truck can be filled and the resulting dust removed to prevent contamination of the atmosphere. A clam shell type enclosure is thus provided which in the extended open position allows unobstructed access into the adjustable hood assembly and in the retracted closed position provides intimate wrap-around enclosure of the cement truck during filling and dust removal operations. The width of the assembly in the extended open position can be varied by making minor mechanical adjustments to the frame system.

Abstract: A drive-through dust hood assembly for transit mix trucks is provided by a pair of side curtains that are pivotally mounted on a top closure panel and which cooperate to close about the end of a truck and the mouth of the mixer drum to capture any dust created by filling thereof. The side curtains may be pivoted from the closed positon to an extended position for easy transit mix truck access when not exhausting dust. The side curtains of the closure are made of flexible sheet material that will conform to the irregular size and shape of various style trucks, so that filling dust does not escape to the ambient air. The exhausted dust is captured in a bag house or other suitable filtration facility for reuse or subsequent disposal. Swinging curtain closures are used for the back of the truck to permit efficient closing of the back area while allowing easy pivoting of the curtains should the truck not fully clear the open assembly.