Patent ID: 6860435

Claim:
An irrigator for applying a liquid to an area of land, said irrigator comprising: a moveable nozzle boom arm adapted to drive a winding means; a winding means coupled to said nozzle boom arm; a governor connected to said moveable nozzle boom arm and to said winding means; wherein the governor includes regulation means having pressure and temperature compensated flow valves and having a limiting means that limits the torque applied to the winding means so that an upper tension limit is not exceeded; and wherein, in use, the governor controls the speed of said winding means and the speed and movement of said moveable nozzle boom arm, so that application depth of liquid being applied by the irrigator can be kept substantially constant and the regulation means is adapted to maintain or regulate the speed of the winding means and the speed of the nozzle boom arm at substantially a constant tolerance or within an acceptable tolerance about a set point so that as varying forces are applied to the irrigator the application depths are not significantly altered.