Cultivating apparatus for crops

Claim 1

IN A CULTIVATOR FOR ROWS OF PLANTS, A FRAMEWORK, MEANS ATTACHED TO SAID FRAMEWORK FOR MOUNTING SAID FRAMEWORK ON A TRACTOR FOR MOVEMENT OVER THE GROUND AND OVER THE PLANTS, A TRANVERSELY EXTENDING SHAFT, MEANS ROTATABLY SUPPORTING SAID SHAFT FROM SAID FRAMEWORK, DRIVE MEANS COUPLED TO SAID SHAFT FOR THE ROTATION THEREOF, A PLURALITY OF CULTIVATOR UNITS RESPECTIVELY DISPOSED IN THE SPACESD BETWEEN SAID ROWS OF PLANTS AND EACH OF SAID CULTIVATOR UNITS INCLUDING A PAIR OF EARTH-WORKING HEADS DISPOSED BETWEEN AN ADJACENT PAIR OF ROW OF PLANTS; EACH OF SAID CULTIVATOR UNITS ADDITIONALLY COMPRISINGA CASING, PIVOT MIEANS PIVOTALLY MOUNTING SAID CASING ON SAID FRAMEWORK WITH SAID CASING DEPENDING THEREFROM AND BEING ADAPTED TO DEPEND BETWEEN ADJACENT ROWS OF PLANTS IN SUBSTAITLALY CENTERED RELATIONSHIP THERETO, AN AXLE, BEARING MEANS ROTATABLY SUPPORTING SAIDAXLE IN SAID CASING ADJACENT THE LOWER END THEREOF AND EXTENDING LATERALLY THEREFROM IN A DIRECTION SUBSTANTIALLY TRANSVERSE RELATIVE TO THE DIRECTION OIF MOVEMENT OF SAID FRAMEKWORK, SAID PAIR OF EARTH-WORKING HEADS BEING MOUNTED ON SAID AXLE FOR ROTATION THEREWITH, SAID EARTH-WORKING HEADS HAVING A SUBSTANTIALLY FRUSTO-CONICAL SHAPE, SAIDEARTH-WORKING HEADS BEING DISPOSED ON OPPOSITE SIDES OF SAID CASING AND EXTENDING LATERALLY IN OPPOSITE DIRECTIONS FOR RESPECTIVELY WORKING ON ADJACENT SIDES OF ADJACENT ROWS OF PLANTS, MOTION TRANSMISSION MEANS CONNECTING SAID AXLE WITH SAID SHAFT FOR ROTATION THEREWITH, A PLURALITY OF SWEEPS, AND MEANS RESPECTIVELY MOUNTING SAID SWEEPS FROM SAID FRAMEWORK FORWARDLY OF AND BETWEEEN SAID PAIR OF EARTH-WORKING HEADS OF SAID CULTIVATOR UNITS FOR THROWING DIRT INTO THE PATHS OF SAID EARTH-WORKING HEADS OF SAID CULTIVATOR UNITS.