US Patent 9376141 Steering apparatus with multi-steering modes

The present invention relates to a steering system that allows the user to switch between a first steering mode and a second steering mode by a purely mechanical means. This includes, but is not limited to, switching from an all-wheel steering mode to a crab steering mode. The four wheel steering interchange system includes a chassis, a front wheel steering system, a rear wheel steering system, and a steering control link that connects the front wheel steering system and the rear wheel steering system. The four wheel steering interchange system also includes a steering interchange that mechanically switches the steer of the attached vehicle from one mode to a second mode.