(under subclass 80.1) Vehicles in which the running gear units may be moved along a line extending in the direction of travel as an assembly, typically to change the wheel base.
SEE OR SEARCH THIS CLASS, SUBCLASS:
638+, for a vehicle including means for altering a dimension of the vehicle or a part thereof.
SEE OR SEARCH CLASS
180, Motor Vehicles,
24.02, for vertically moveable running gear for shifting or proportioning the load, e.g., tag axles.
