Toothed harrow attachment

Claim 1

IN COMBINATION WITH A DISPLACEABLE PLOW FRAME HAVING A PLOW SHARE MOUNTED THEREON, A HARROW ATTACHMENT COMPRISING, SPACED BRACKET MEANS DEFINING A ROTATIONAL AXIS DISPOSED ABOVE THE FRAME AND PERPENDICULAR TO DIRECTION OF MOVEMENT OF THE FRAME, SHAFT MEANS ROTATABLY MOUNTED BY SAID SPACED BRACKET MEANS FOR LIMITED ANGULAR DISPLACEMENT ABOUT SAID ROTATIONAL AXIS IN BOTH DIRECTIONS, SAID SHAFT MEANS INCLUDING A PORTION PROJECTING LATERALLY OF ONE OF SAID SPACED BRACKET MEANS AND DEPENDING REARWARD AND DOWNWARD FROM THE FRAME, A HARROW BLADE ASSEMBLY, MEANS ADJUSTABLY CONNECTING SAID ASSEMBLY TO A LOWER END OF SAID PORTION OF THE SHAFT MEANS IN LATERALLY ADJUSTABLE REARWARDLY SPACED RELATION TO THE PLOWSHARE, AN ARM FIXED TO SAID SHAFT MEANS ADJACENT TO SAID ONE BRACKET MEANS PROJECTING UPWARDLY AND FORWARDLY THEREOF, LEVER MEANS PIVOTALLY MOUNTED ON SAID ONE BRACKET MEANS FORWARDLY OF THE SHAFT MEANS AND OPERATIVELY CONNECTED TO SAID ARM AND RESILIENT MEANS MOUNTED ON SAID LEVER MEANS FOR BIASING THE SHAFT MEANS IN ONE ROTATIONAL DIRECTION FOR ENGAGING THE HARROW BLADE ASSEMBLY WITH THE GROUND.