Patent ID: 6916029

Claim:
On an axle having hub assemblies pivotally mounted thereto, a mechanism for controlling the pivoting of the hub assemblies, comprising: a rod disposed along the axle; pivot connections between the rod and the hub assemblies; a bracket on the axle; an aperture defined by the bracket, the rod passing through and movable in the aperture; wherein the aperture permits one motion component of the rod toward or away from the axle and permits another motion component of the rod parallel to the axle; a flange retained on the rod, the flange spanning an opening of the aperture and slidingly engaging the bracket; wherein the flange is translatable on the bracket transversely to the axle but immobile in a direction parallel to the axle; a collar at the end of the rod; and a spring disposed along the rod, one end of the spring engaging the collar and another end of the spring engaging the flange; wherein the spring biases the rod and a hub assembly toward a position where the hub is at a desired steering angle.