Patent ID: 7866580

Claim:
A steerable support apparatus for supporting and steering an irrigation swing arm, the apparatus comprising: a support member extending transversely to an irrigation swing arm; a first support hub operatively connected to said support member; a second support hub operatively connected to said support member; a first gearbox operatively connected to said first support hub; a second gearbox operatively connected to said second support hub; a first and a second ground floatation member operatively connected to said first gearbox, wherein said first and said second ground floatation members are positioned on opposing sides of said first support hub, and wherein said first ground flotation member is positioned for movement along a different path of travel from that of said second ground floatation member; and a third and a fourth ground floatation member operatively connected to said second gearbox, wherein said third and fourth ground floatation members are positioned on opposing sides of said second support hub, and wherein said third ground flotation member is positioned for movement along a different path of travel from that of said fourth ground floatation member.