Pump for imparting movement to dry pulverulent material

Claim 1

A PUMP FOR IMPARTING MOVEMENT TO DRY PULVERULENT MATERIAL COMPRISING: (A) A HORIZONTALLY ELONGATED CONVEYOR SCREW CYLINDER HAVING AN OPEN DISCHARGE EXTEREMITY AND A CLOSED INTAKE EXTREMITY, SAID CYLINDER BEING PROVIDED WITH AN INTAKE OPENING IN ITS TOP ADJACENT SAID INTAKE EXTREMITY FOR RECEIVING SAID PULVERULENT MAATERIAL; (B) A CONVEYOR SCREW MOUNTED ON A TUBULAR SHAFT ROTATABLY JOURNALLED IN THE INTAKE EXTREMITY OF SAID CYLINDER AND EXTENDING THROUGHOUT THE LENGTH OF THE LATTER FOR CONVEYING MATERIAL LONGITUDINALLY OF SAID CYLINDER AND DISCHARGING SAME AT THE OPEN DISCHARGE EXTREMITY; (C) MEANS FOR INTRODUCING AIR UNDER PRESSURE INTO THE INTAKE EXTREMITY OF SAID SHAFT, SAID AIR DISCHARGING AT THE DISCHARGE EXTREMITY OF SAID CYLINDER; (D) A TUBULAR REDUCER PORTION MOUNTED ON SAID DISCHARGE EXTREMITY, SAID PORTION GRADUALLY DECREASING IN DIAMETER TOWARD SAID DISCHARGE EXTREMITY TO APPLY A COMPRESSIVE BIAS TO THE MATERIAL DISCHARGING FROM SAID EXTREMITY; (E) A FEED HOPPER MOUNTED ON SAID CYLINDER OVER SAID INTAKE OPENING FOR DIRECTING MATERIAL THROUGH THE LATTER; (F) A POROUS-WALLED TUBE MOUNTED ON THE DISCHARGE EXTEREMITY FOR RECEIVING THE AIR DISCHARGING FROM SAID TUBULAR SHAFT AND DISTRIBUTING SAID AIR THROUGH THE DISCHARGING PULVERULENT MATERIAL; AND (G) FORWARDLY AND OUTWARDLY DIRECTED JET TUBES MOUNTED ON THE DISCHARGE EXTREMITY OF SAID SHAFT AND ROTATABLE WITH THE LATTER TO DISCHARGE AIR ABOUT THE PERIPHERAL PORTIONS OF THE STREAM OF DISCHARGING PULVERULENT MATERIAL.