(under subclass 431) Device including either a chain of pivoted elements, or a belt, wherein the belt or chain is in the form of a closed loop which is carried by a vehicle and contacts a supporting surface, and which is caused to revolve to propel the vehicle forward, or structure which simulates such a chain or belt.
SEE OR SEARCH THIS CLASS, SUBCLASS:
425, for an endless track vehicle having a vertically swinging load supporting bucket or scoop.
