Patent ID: 8215717

Claim:
A dump trailer comprising: a first frame, the first frame bearing one or more sets of wheels; a second frame, the second frame comprising an attachment device to permit coupling to a towing vehicle; a third frame positioned above the first and second frames and providing support for a trailer bed; one or more roller subassemblies positioned between the first frame and the second frame, wherein the roller subassemblies permit forward and rearward movement of the second frame relative to the first frame; one or more pivot subassemblies, wherein the one or more pivot subassemblies permit the third frame to pivot as the second frame moves forward and rearward relative to the first frame; one or more pivoting arms, wherein the one or more pivoting arms cause the third frame to pivot about the one or more pivot subassemblies as the second frame moves forward and rearward relative to the first frame.