Fertilizer spreader

Claim 1

A FERTILIZER SPREADER COMPRISING IN COMBINATION: A WHEELED FRAME; A HOPPER SECURED TO SAID FRAME HAVING A REAR WALL WITH AN OPENING IN THE BOTTOM SECTION THEREOF; CONDUIT MEANS SECURED TO SAID WALL ALIGNED WITH AND DISPOSED ABOUT SAID OPENING AND EXTENDING REARWARDLY THEREFORM TO PROVIDE A SUBSTANTIALLY ENCLOSED CONDUIT, SAID CONDUIT MEANS HAVING AN OPEN END ADAPTED FOR POSITIONING IN FERTILIZER MATERIAL TO BE LOADED INTO SAID HOPPER; FAN MEANS POSITIONED IN SAID OPEN END; FIRST SCREW CONVEYOR MEANS DISPOSED IN SAID CONDUIT MEANS; SECOND SCREW CONVEYOR MEANS INSIDE SAID HOPPER ADAPTED UPON ROTATION IN ONE DIRECTION TO MOVE MATERIAL IN SAID HOPPER TOWARD SAID OPENING AND UPON ROTATION IN THE OPPOSITE DIRECTION TO MOVE MATERIAL AWAY FROM SAID OPENING; GATE MEANS SELECTIVELY POSITIONABLE TO COVER SAID OPENING; DRIVE MEANS COUPLED WITH SAID FAM MEANS AND EACH OF SAID CONVEYOR MEANS; AND DRIVE CONTROL MEANS COUPLED WITH SAID DRIVE MEANS FOR CONTROLLING THE DIRECTION OF ROTATION OF SAID SECOND SCREW MEANS.