Grading system

A grading system for connection to a vehicle having vertically movable arms comprising:

• a grading blade assembly comprising:
• a frame including a first pivot extending upward between an upper member and a lower member, a second pivot extending forward between the upper member and the lower member, and a rearward facing mounting plate connected to the upper member and to the lower member;
• a blade comprising a forward facing blade body having a lower edge, an upper edge and opposed ends, wherein the blade is connected to the frame via the first pivot and the second pivot;
• a blade yaw actuator connected to the frame and to the blade, wherein the blade yaw actuator adjusts yaw movement of the blade relative to the first pivot;
• a blade roll actuator connected to the frame and to the blade, wherein the blade roll actuator adjusts roll movement of the blade relative to the second pivot;
• wherein the frame is configured to have the first pivot extend substantially vertically and the second pivot extend substantially longitudinally when the grading blade assembly is connected to the vehicle and the blade and vehicle are in a level position on a ground surface and the vertically movable arms of the vehicle are in a first raised position above a lowest most position;
• wherein the grading blade assembly further comprises end walls that are connected to and extend forward from the respective opposed ends of the blade;
• and
• a cutting element assembly comprising:
• a rotor having opposed ends;
• cutting teeth connected to the rotor and having respective cutting edges at an angle relative to an outer surface of the rotor so as to provide cutting in one rotational direction;
• first and second arms each having a distal end rotatably connected to one of the respective opposed ends of the rotor and a proximal end pivotally connected to one of the respective end walls that extend forward from the opposed ends of the blade;
• at least one lift actuator having a first end pivotally connected to at least one of the first and second arms at a location spaced from the pivotal connection of the arm to the respective end wall and having a second end pivotally connected to the grading blade assembly, wherein the arms of the cutting element assembly have at least one lowered position and at least one raised position;
• and
• a drive motor rotatably coupled to the rotor.