Patent ID: 6796572
Filing Date: 2004-09-28
Classification: B62D

Abstract:
A method for steering a transport vehicle, comprising:(a) providing a transport vehicle having a rotatable tow bar and a front dolly having front wheels; (b) providing a device for steering said transport vehicle, including: a variable length strut connected between said tow bar and said front dolly, said variable length strut having a first section and a second section, said first section and said second section longitudinally movable with respect to one another; a hydraulic power steering valve having a first end and a second end; and, said first end of said power steering valve connected to said first section of said variable length strut, and said second end of said power steering valve connected to said second section of said variable length strut; and, (c) rotating said tow bar thereby causing said first section and said second section of said variable length strut to longitudinally move with respect to one another, said motion causing said power steering valve to assume a hydraulic switching state, said hydraulic switching state including one of (a) a left state which causes said front wheels of said front dolly to turn in a left direction, and (b) a right state which causes said front wheels of said front dolly to turn in a right direction.