US PATENT SUBCLASS 180 / 252
HAVING AT LEAST ONE WHEEL BOTH DRIVEN AND STEERABLE

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

252HAVING AT LEAST ONE WHEEL BOTH DRIVEN AND STEERABLE {4}
253  DF  .~> Steerable wheel has exclusive axis of pivot (i.e., stub-axle type) {1}
264  DF  .~> With driven axle, mounting two or more wheels, swingable about axis of pivot, and motor mounted to swing therewith {1}
266  DF  .~> With driven axle, mounting two or more wheels, swingable about axis of pivot, and swingable also about a horizontal axis
267  DF  .~> With driven axle, mounting two or more wheels, swingable about axis of pivot, and shaft for transmitting drive coincident with axis

DEFINITION

Classification: 180/252

HAVING AT LEAST ONE WHEEL BOTH DRIVEN AND STEERABLE:

(under the class definition) Vehicle wherein one or more of

its wheels is not only drivingly rotated for propelling the vehicle, but is also attached to the vehicle in such a manner that it may be moved pivotably (e.g., rotatably) about a more or less vertical axis for changing the course of travel of the vehicle.

(1) Note. This and the indented subclasses consist primarily of that art which remained in former subclasses 42+ subsequent to the removal therefrom of the art devoted to vehicles having four wheels driven; see also (1) Note of subclass 233 above.

(2) Note. Contrary to the statement in the Glossary of the class definition that the term "steering wheel" defines a road wheel which is swingable to change the course of the vehicle, the project which reclassified former subclasses 42+ adopted, instead, the designation of "steerable wheel" for such a road wheel.

(3) Note. The substitution of a dual wheel (i.e., two wheels having their central (e.g., spider) portions joined back to back, or being otherwise connected to move as one member, there being, in any case, insufficient space between the two to accommodate any such mechanism as a drive chain or a steering gear shaft) for a single wheel at one or more of the wheel-carrying locations of a vehicle does not, for the purposes of this and the indented subclasses, change the number of wheels on the vehicle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

6.2+, for a motor vehicle which is steerable by creating a difference between the driving effort developed by one or more traction elements located on one side of the vehicle and the driving effort developed by one or more traction elements located on the other side thereof.

12+, for a motor vehicle having a motor-carrying attachment in the nature of a wheeled frame and wherein the wheels of the frame are driven and steered. 23+, for a motor vehicle having a wheel arrangement comprising five or more wheels and wherein one or more of the wheels are driven and steered.

37+, for a motor vehicle of the steam traction engine type having steering wheels which are driven.

211+, for a motor vehicle having a wheel arrangement comprising three wheels and wherein at least one of the wheels is driven and steered.

222, for a motor vehicle having a wheel arrangement comprising two wheels in tandem relationship and wherein one of the wheels is driven frictionally and further wherein means is provided for steering that wheel.

223+, for a motor vehicle having a wheel arrangement comprising two wheels in tandem relationship and wherein at least one of the wheels is driven and steered.

400+, for a motor vehicle having means for guiding it.

SEE OR SEARCH CLASS

280, Land Vehicles,

5.5+, for a general utility land vehicle including an active suspension responsive to a force encountered while the vehicle is in surface traversing motion which may or may not involve a driven and steered wheel; subclasses 124.1+ for a general utility wheeled land vehicle suspension arrangement which may or may not involve a driven and steerable wheel; or subclasses 771+ for a general utility wheeled land vehicle including occupant controlled steering.