Patent ID: 7303157
Filing Date: 2007-12-04
Classification: A01G

Abstract:
1. A self-propelled irrigation system, comprising: an elongated water pipeline supported upon the upper ends of drive units which are spaced along the length of the pipeline; said water pipeline being in communication with a source of water under pressure; said drive units each including a wheeled frame including a support frame extending upwardly therefrom which is attached to said water pipeline; at least some of said drive units having a ballast water tank operatively secured to the wheeled frame and/or support frame thereof; said ballast water tank having a water inlet opening and a water discharge opening; a water conduit extending from said water inlet opening to said water pipeline to provide fluid communication between said water pipeline and said ballast water tank; a first water valve imposed in said water conduit; said water discharge opening having a second water valve associated therewith.