Inventors:
Phillip Grothen - Juniata NE
International Classification:
B05B 318
Abstract:
A hydraulic control apparatus for hydraulically powered center pivot irrigation systems which utilizes dual-spool, four-way hydraulic valves for controlling the movement of inner support towers, and a pressure controlled directional valve with a dedicated high pressure line to control the direction and speed of the outer tower and hence of the entire system. One of the spools controls the clockwise movement of the irrigation system, while the second spool controls system movement in the counter clockwise direction. Should an inner support tower malfunction and fail to move, the outer sections can be driven back into realignment by simply reversing the hydraulic pressure in the two primary lines.