Material unloading device

Claim 1

A MATERIAL UNLOADING DEVICE FOR DISCHARGING MATERIAL THEREFROM LATERALLY OF THE DEVICE, SAID UNLOADING DEVICE COMPRISING, IN A COMBINATION, AN ELONGATED MATERIAL CONTAINER HAVING AXIALLY SPACED ENDS AND AN ELONGATED OPENING LONGITUDINALLY THEREOF AND BEING OF SUBSTANTIALLY UNIFORM INTERNAL CROSS-SECTION ALONG ITS LENGTH, A MATERIAL UNLOADER CARRIED BY SAID ELONGATED MATERIAL CONTAINER AND ARRANGED FOR MOVEMENT LONGITUDINALLY THEREOF, SAID MATERIAL UNLOADER INCLUDING AN UPRIGHT BACKING WALL, OF SUBSTANTIALLY SIMILAR CROSS-SECTION AS THE INTERNAL CROSS-SECTION OF THE MATERIAL CONTAINER, POSITIONED WITHIN THE MATERIAL CONTAINER AND EXTENDING TRANSVERSELY OF THE AXIS OF THE MATERIAL CONTAINER AND PRESENTING AN OPERATIVE SIDE POSITIONED TO FACE THE MATERIAL SPREADING MEANS MOUNTED TO UNLOADED, ROTARY MATERIAL SPREADING MEANS MOUNTED TO ROTATE IN A PLATE TRANSVERSE TO THE LONGITUDINAL AXIS OF THE MATERIAL CONTAINER AND SPACED FROM SAID OPERATIVE SIDE OF THE BACKING WALL, MEANS FOR MOVING SAID MATERIAL SPREADING MEANS AND BACKING WALL LONGITUDINALLY OF THE MATERIAL CONTAINER, AN ELONGATED ROTATABLE DRIVE SHAFT EXTENDING AXIALLY OF SAID ELONGATED MATERIAL CONTAINER, SAID BACKING WALL AND ROTARY MATERIAL SPREADING MEANS BEING MOUNTED ON SAID DRIVE SHAFT FOR SIMULTANEOUS SLIDING MOVEMENT ON SAID SHAFT LONGITUDINALLY OF THE MATERIAL CONTAINER, AND MEANS DRIVINGLY COUPLING SAID DRIVE SHAFT TO SAID MATERIAL SPREADING MEANS TO CAUSE SAME TO ROTATE IN UNISON.