US PATENT SUBCLASS 180 / 23
.~.~ Driven steering wheel type

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

21  DF  SPECIAL WHEEL BASE {6}
22  DF  .~ Five or more wheels {12}
23.~.~ Driven steering wheel type {1}
24  DF  .~.~.~> Stub-axle type

DEFINITION

Classification: 180/23

(under subclass 22) Apparatus in which one of the supporting wheels is a driving wheel which is positively moved by independent means for guidance of the vehicle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

6.2, for vehicles that are steered by causing a relative

difference in the rate of travel between traction elements on opposite sides thereof.

24.01, for vehicles in which nondriving wheels are positively moved for steering a vehicle.