Patent ID: 6921109

Claim:
An apparatus for controlling steering of a vehicle having a frame and at least one drive wheel rotatably connected to the frame, the apparatus comprising: a rotatable steering device adapted to receive input motion of a magnitude; at least one arm having a first end and a second end, the first end operatively coupled to the rotatable steering device so as to move: (a) forward when the steering device is rotated in one direction; and (b) backward when the steering device is rotated in an opposite direction; at least one cam member having: (a) a first portion pivotally connectable to the arm; (b) a second portion pivotally connectable to the frame of the vehicle; and (c) a slot wall having a plurality of curved portions, each of the curved portions associated with a variable degree of steering responsiveness, the slot wall sized to receive a portion of a follower member, the cam member operable to cause the follower member to have an output motion of a magnitude, the magnitude of the input motion divided by the magnitude of the output motion defining a ratio which varies depending upon the magnitude of the input motion.