Bulk material hopper unloader

Claim 1

A BULK MATERIAL UNLOADER FOR HOPPER HAVING A SUBSTANTIALLY V-SHAPED IN CROSS SECTION, ELONGATED BOTTOM DISCHARGE PORTION WITH A HORIZONTALLY ARRANGED BOTTOM FLOOR AND A PAIR OF ALIGNED TUBULAR NOZZLES OPENING IN SAID PORTION AT THE OPPOSITE ENDS THEREOF AND ADJACENT SAID FLOOR, SAID NOZZLES BEING PROVIDED WITH CLOSURES FOR NORMALLY CLOSING OFF THEIR FREE, OPEN ENDS; SAID UNOLADER COMPRISING A HOUSING CAP ARRANGED FOR COVERING ONE OF SAID NOZZLES UPON REMOVAL THEREFROM OF ITS RESPECTIVE CLOSURE; AN ELONGATED TUBE EXTENDED THROUGH AND BEING ROTATABLY ADJUSTABLY MOUNTED IN AN OPENING FORMED IN SAID HOUSING CAP, WITH ONE END OF THE TUBE BEING EXTENDED OUTWARDLY OF THE HOUSING CAP AND NOZZLE AND HAVING MEANS CONNECTED THERETO FOR CONNECTION TO A SUCTION HOSE, THE TUBE BEING SEALED WITHIN THE HOUSING CAP OPENING, SAID TUBE EXTENDING THE LENGTH OF SAID BOTTOM FLOOR AND HAVING ITS OPPOSITE END POSITIONED CLOSELY ADJACENT TO THE FREE END OF THE OPPOSITE TUBULAR NOZZLE SO THAT UPON REMOVAL OF THE RESPECTIVE CLOSURE AIR MAY FLOW INTO AND THROUGH SAID TUBE; SAID TUBE BEING LOCATED CLOSELY ADJACENT TO SAID FLOOR AND BEING OF CONSIDERABLY SMALLER DIAMETER THAN THE DIAMETER OF THE TUBULAR NOZZLES; AN AXIALLY EXTENDING, NARROW SLOT FORMED IN THE TUBE, SAID SLOT BEING POSITIONABLE AT VARIOUS RADIAL ANGLES RELATIVE TO THE TUBE AXIS FOR ADJUSTING THE FLOW OF BULK MATERIAL THERETHROUGH BY ROTATABLY ADJUSTING THE TUBE WITHIN THE HOUSING CAP, AND SAID HOUSING CAP HAVING MEANS FORMED THEREON FOR FIXING THE POSITION OF THE TUBE WITHIN SAID OPENING.