US PATENT SUBCLASS 180 / 200
.~ Comprising rotatably driven auxiliary wheel or endless track

Current as of: June, 1999
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180 /   HD   MOTOR VEHICLES

199  DF  WITH POWERED, GROUND-ENGAGING MEANS FOR PRODUCING, OR ASSISTING IN THE PRODUCTION OF, LATERAL MOVEMENT OF THE VEHICLE (E.G., FOR PARKING) {2}
200.~ Comprising rotatably driven auxiliary wheel or endless track {2}
201  DF  .~.~> Driven by frictional engagement with tire of vehicle traction wheel
202  DF  .~.~> Driven by auxiliary electric or fluid motor

DEFINITION

Classification: 180/200

Comprising rotatably driven auxiliary wheel or endless track:

(under subclass 199) Vehicle wherein the means includes at

least one wheel or endless track, which wheel or endless track (a) supplements or replaces some or all of the vehicle's usual ground-engaging elements in supporting the vehicle, (b) is driven about its axis of rotation, and (c) transports the vehicle in a sidewise direction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

7.1+, for a motor vehicle which is driven in some other way than by the mere rotation of road wheels as traction wheels.

203, for a motor vehicle which is provided with powered, ground-engaging means for producing, or assisting in the production of, lateral movement of the vehicle and wherein the means is a wheel substitute which may engage the ground cyclically.