Patent Number: 6,254,018

Title: Alignment control for long center pivot irrigation systems

Abstract: An alignment control is provided for long center pivot irrigation systems which include a center pivot structure having an elongated water pipe extending outwardly therefrom with the water pipe being supported upon a plurality of drive units which propel the water pipe around the center pivot structure. A first GPS control is positioned on the center pivot structure which functions as a stationary reference. A second GPS control is positioned on the center drive unit near the center length of the water pipe. A third GPS control is mounted on the last or outermost drive unit. A computer-operated control is operatively connected to the drive motor on the center drive unit. The first, second and third GPS controls are operatively connected to the computer-operated control which computes an approximate straight line between the center pivot structure and the last drive unit and which selectively operates the drive motor on the center drive unit so that the center drive unit will be positioned within some tolerance of the approximate straight line between the center pivot structure and the last drive unit.

Inventors: Ostrom; Carl R. (Omaha, NE)

Assignee: Valmont Industries, Inc.

International Classification: A01G 25/09 (20060101); A01G 25/00 (20060101); B05B 1/14 (20060101); B05B 1/20 (20060101); G01S 5/14 (20060101); B05B 003/12 ()

Expiration Date: 07/03/2018