Patent ID: 8528685

Claim:
A vehicle comprising: a frame; steerable left and right front wheel assemblies both located at or near a forward end of the frame, wherein the left and right front wheel assemblies each comprise: a front support arm pivotally coupled to the frame; and a rotatable ground-engaging front wheel coupled to the front support arm; steerable left and right rear wheel assemblies both located at or near a rearward end of the frame, wherein the left and right rear wheel assemblies each comprise: a rear support arm pivotally coupled to the frame; and a rotatable ground-engaging rear wheel coupled to the rear support arm, wherein each of the steerable left and right rear wheel assemblies further includes a wheel motor; and a steering linkage assembly comprising: a steering input device coupled to the frame and located proximate an operator station; a steering actuator coupled to the frame and configured to reposition the steering linkage assembly in response to manipulation of the steering input device; a rear bell crank pivotally coupled to the frame; left and right rear tie rods each comprising: a proximal end pivotally coupled to the rear bell crank; and a distal end, the distal ends of the left and right rear tie rods pivotally coupled to the left and right rear wheel assemblies, respectively; a front steering lever arm pivotally coupled to the frame; and left and right front tie rods each comprising: a proximal end pivotally coupled to the front steering lever arm; and a distal end, the distal ends of the left and right front tie rods pivotally coupled to the left and right front wheel assemblies, respectively; and a longitudinal tie rod comprising an aft end pivotally coupled to the rear bell crank, and a forward end pivotally coupled to the front steering lever arm.