(under subclass 5.2) Vehicles having endless traction elements (1) shiftably mounted from a normal tractive position to a second position angularly disposed on the vehicle to contact the edge portion of a step or abutment to propel the vehicle while in upright position at an incline to the horizontal, or (2) which are designed to have one portion active while traveling horizontally and a second portion active while ascending or descending a step or abutment, or (3) which are auxiliary to the normal running gear to provide a secondary traction means operative only when ascending or descending steps or the like.
SEE OR SEARCH CLASS
180, Motor Vehicles,
9.1+, for a motor vehicle including a special driving device of endless track configuration.
305, Wheel Substitutes for Land Vehicles, appropriate subclasses for endless flexible track type wheel substitutes.
