Cultivator

Claim 1

A CULTIVATOR COMPRISING A FRAME ADAPTED TO BE MOUNTED ON A VEHICLE, A SUPPORTING MEMBER MOUNTED ON SAID FRAME FOR PIVOTAL MOVEMENT ABOUT A HORIZONTAL PIVOT AND EXTENDING LATERALLY OUTWARDLY THEREFROM, MEANS MOUNTED ON SAID FRAME AND OPERATIVELY CONNECTED TO SAID SUPPORTING MEMBER FOR ADJUSTING THE ANGLE THEREOF RELATIVE TO THE HORIZONTAL, AN EXTENDABLE AND RETRACTABLE ARM TELESCOPICALLY MOUNTED ON SAID SUPPORTING MEMBER AND HAVING A PORTION OF SAID ARM EXTENDING OUTWARDLY FROM SAID SUPPORTING MEMBER AND TERMINATING IN A FREE END PORTION, MEANS OPERATIVELY CONNECTED TO SAID SUPPORTING MEMBER AND SAID ARM FOR EXTENDING AND RETRACTING SAID ARM RELATIVE TO SAID SUPPORTING MEMBER, A ROTATABLE CULTIVATING TOOL ADAPTED TO PENETRATINGLY ENGAGE A SURFACE TO BE CULTIVATED, MEANS MOUNTING SAID TOOL ON THE FREE END PORTION OF SAID ARM FOR PIVOTAL MOVEMENT ABOUT A HORIZONAL PIVOT, MEANS OPERATIVELY CONNECTED TO SAID TOOL FOR ROTATING THE SAME, AND MANUALLY CONTROLLED HYDRAULIC MEANS CARRIED BY SAID ARM AND OPERATIVELY CONNECTED TO SAID TOOL MOUNTING MEANS FOR MOVING SAID TOOL ABOUT ITS HORIZONTAL PIVOT TO CHANGE THE ANGLE OF THE CULTIVATING TOOL RELATIVE TO THE HORIZONTAL CORRESPONDING TO CHANGES IN THE SLOPE OF THE SURFACE ENCOUNTERED DURING OPERATION OF SAID CULTIVATOR TO MAINTAIN THE TOOL IN SUBSTANTIALLY THE SAME ATTITUDE RELATIVE TO THE SURFACE DESPITE IRREGULARITIES IN THE SLOPE OF THE SURFACE, THE ADJUSTMENT OF THE ANGLE OF SAID SUPPORTING MEMBER SERVING TO VARY THE DEPTH OF PENETRATION OF SAID CULTIVATING TOOL INTO THE SURFACE FOR VARYING THE CULTIVATING ACTION ON THE SURFACE.