Air suction potato conveyor harvesting machine

Claim 1

AN AIR SUCTION POTATO HARVESTING MACHINE FOR SEPARATING POTATOES FROM STONES AND VINES COMPRISING AN AIR SUCTION EXPANSION CHAMBER HAVING POTATO INLET AND DISCHARGE OPENINGS, A POTATO AND STONE DELIVERY CONVEYOR EXTENDING INTO PROXIMITY OF THE POTATO INLET OPENING AND INTO THE PATH OF SUCTION AIR BEING DRAWN INTO THE EXPANSION CHAMBER SO THAT THE POTATOES ARE LIFTED FROM THE CONVEYOR WHILE THE STONES ARE PERMITTED TO CONTINUE TO TRAVEL ON THE CONVEYOR AND BE DISCHARGED THEREFROM, A POTATO DISCHARGE CONVEYOR EXTENDING INTO THE POTATO OUTLET OPENING OF THE EXPANSION CHAMBER AND INTO PROXIMITY OF THE POTATO INLET OPENING SO AS TO RECEIVE THE POTATOES BEING DRAWN FROM THE DELIVERY CONVEYOR THROUGH THE INLET OPENING AND INTO THE EXPANSION CHAMBER, ADJUSTABLE FLAP MEANS FOR CONTROLLING THE FLOW OF AIR BEING SUCKED THROUGH THE POTATO INLET OPENING, MEANS FOR SEALING EXPANSION CHAMBER ABOUT THE DISCHARGE OUTLET OPENING AND POTATO DISCHARGE CONVEYOR WHILE PERMITTING THE PASSAGE OF THE POTATOES THROUGH THE POTATO DISCHARGE OPENING THEREOF, MEANS FOR ADJUSTING THE PITCH OF A PORTION OF THE DELIVERY CONVEYOR TO PROVIDE ELEVATED TRAVEL OF THE POTATOES AT THE POINT OF RELEASE OF THE POTATOES FROM THE DELIVERY CONVEYOR AND IN THE PROXIMITY OF THE POTATO INLET OPENING OF THE EXPANSION CHAMBER, THE MEANS FOR CONTROLLING THE FLOW OF SUCTION AIR ENTERING THE POTATO LET OPENING COMPRISING AN ADJUSTABLE FLAP HINGEDLY CONNECTED TO THE EXPANSION CHAMBER ACROSS THE TOP OF THE POTATO INLET OPENING AND DEPENDING OUTWARDLY AND DOWNWARDLY THEREFROM, MEANS FOR RETAINING SAID FLAP IN ANY ONE OF ITS ADJUSTED POSITIONS RELATIVE TO THE INCLINED PORTION OF THE DELIVERY CONVEYOR AND THE INLET OPENING OF THE EXPANSION CHAMBER, AND AN AUXILIARY FLAP HINGED TO THE LOWER END OF THE SAID ADJUSTABLE FLAP AND HAND CRANK MEANS EXTENDING BETWEEN THE AUXILIARY FLAP AND THE SAID FIRST-MENTIONED ADJUSTABLE FLAP MEANS TO ALTER THE POSITION OF THE AUXILIARY FLAP RELATIVE TO THE FIRST-MENTIONED ADJUSTABLE FLAP.