Hopper spreader for a truck box

A hopper spreader for use with a truck box to spread aggregate, comprising:

• an elongated hopper adapted to be mounted across the rear end of a truck box in an underslung position for receiving aggregate from the box;
• the hopper having side, front and rear walls and forming an elongated slot in its lower end for discharging aggregate;
• the slot having upper and lower portions;
• a pair of drums having outer and inner ends and arranged in coaxial end-to-end relationship, said drums being positioned within the hopper, said drums extending along and protruding through the lower portion of the slot, said drums being rotatably supported at their outer ends by the hopper end walls;
• bearing means, positioned within the drums at their inner ends, for rotatably supporting the drum inner ends;
• drive means for separately rotating each drum;
• the hopper front wall comprising ramp means, for extending between the rear lip of the truck box and the drums, for conveying aggregate to the drums;
• a pair of flap assemblies, pivotally mounted to the hopper, for opening and closing the upper portions of the slot above the pair of drums;
• and
• means for separately actuating each of the flap assemblies;
• whereby the drums and flap members can be selectively operated to deposit either a narrow or wide strip of aggregate.