Grain bin sweep unloader

Claim 1

APPARATUS FOR UNLOADING A GENERALLY CYLINDRICAL GRAIN BIN HAVING A FLAT BOTTOM WITH A DISCHARGE OPENING DISPOSED CENTRALLY THEREOF COMPRISING GEARING MOUNTED WITHIN SAID DISCHARGE OPENING AND HAVING AN UPPER PORTION LOCATED ABOVE SAID FLAT BOTTOM, SAID UPPER PORTION BEING ROTATABLY MOUNTED ON THE LOWER PORTION OF SAID GEARING, A DISCHARGE AUGER BENEATH SAID BOTTOM AND EXTENDING RADIALLY FROM THE EXTERIOR OF SAID TANK INTO SAID DISCHARGE OPENING, MEANS FOR DRIVING ONE END OF SAID DISCHARGE AUGER, MEANS AT THE OPPOSITE END OF SAID DISCHARGE AUGER FOR SELECTIVELY CONNECTING SAID DISCHARGE AUGER TO SAID GEAR FOR DRIVING THE LATTER, A RIGID SWEEP AUGER LOCATED WITHIN SAID BIN, UNIVERSAL MEANS PIVOTALLY CONNECTING SAID SWEEP AUGER TO THE UPPER PORTION OF SAID GEARING, YOKE MEANS PIVOTALLY CONNECTED TO THE UPPER PORTION OF SAID GEARING AND ROTATABLY RECEIVING THE SHAFT OF SAID SWEEP AUGER TO FACILITATE VERTICAL MOVEMENT OF SAID SWEEP AUGER, SAID SWEEP AUGER EXTENDING GENERALLY RADIALLY FROM THE UPPER PORTION OF SAID GEARING TO A POSITION ADJACENT TO THE PERIPHERY OF SAID BIN.