Movable bed for gravity bed vehicles

Claim 1

A gravity bed vehicle for handling grain comprising a frame, said gravity bed vehicle having a front and a rear and a pair of transverse sides, four sidewalls mounted on said frame, a first two of said sidewalls extending substantially vertically but sloping downwardly and inwardly, said two sidewalls being located at the respective transverse sides, the other two of said sidewalls sloping downwardly and inwardly from said front and rear respectively, an endless conveyor mounted on said frame and having a horizontal upper surface which extends from one of said pair of transverse sides to the other and from the lower end of one of said other two sidewalls to the lower end of the other of said other two sidewalls, said conveyor including an endless chain belt, a pair of sprocket shafts rotatably mounted on said frame and extending from front to rear on said vehicle, sprockets secured to said shafts and meshing with said chain belt for the driving thereof, a hydraulic motor fixed to said frame and having its drive shaft coupled to one of said sprocket shafts for the driving thereof, said hydraulic motor being reversible and capable of driving one of said sprocket shafts when said vehicle is fixed with respect to the ground, an imperforate floor fixed to said frame and positioned below said horizontal upper surface of said endless chain, said floor extending completely under said horizontal upper surface of said endless chain, said floor extending around said shafts and having slots therein through which said sprockets project, a first pair of wheels rotatably mounted to said front, a second pair of wheels rotatably mounted to said rear, a tongue connected to said first pair of wheels for steering said vehicle.