US PATENT SUBCLASS 180 / 233
HAVING FOUR WHEELS DRIVEN

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

233HAVING FOUR WHEELS DRIVEN {7}
234  DF  .~> With means for steering all driven wheels {5}
242  DF  .~> Including pump and fluid motor, or generator and electric motor, for driving one or more wheels {1}
244  DF  .~> With means for braking either (1) one or more driven wheels or (2) structure transmitting drive to wheel
245  DF  .~> Including separate mechanical assemblies for transmitting drive to each of two wheels at one end of vehicle {1}
247  DF  .~> With manually operated means for disengaging drive to one or more, but fewer than all, of the four wheels
248  DF  .~> With differential means for driving two wheel sets at dissimilar speeds {1}
251  DF  .~> Including longitudinally extending, endless element for transmitting drive to wheels

DEFINITION

Classification: 180/233

HAVING FOUR WHEELS DRIVEN:

(under the class definition) Vehicle provided with four wheels and means for driving each of the wheels.

(1) Note. This and indented subclasses consist, for the most part, of art from former subclasses 42+ which provided for a steerable wheel of the driven type; see also (1) Note of subclass 252 below.

(2) Note. While a majority of the art herein claims the typical four-wheel-drive type of vehicle (i.e., one having a driven wheel at each of its four corners), patents disclosing only that type of vehicle, but not necessarily claiming clearly that exact number of wheels as being driven, are included here (subclasses 233+).

(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, for a steering purpose, is provided with at least one driven traction element on each of two opposite sides and means for driving the elements at different speeds.

14.1+, for a motor vehicle which comprises two or more connected vehicles, at least one of which retains its identity as a complete vehicle when the other or others are detached therefrom, which subclass may include, for example, two coupled vehicles having two driving wheels each. 21, for a motor vehicle having a special wheel-base; note that in the case of a patent claiming a vehicle having four driven wheels so located thereon that they form other than a rectangle, original classification would be in that subclass (21).

24.08, for a motor vehicle having a wheel arrangement comprising five or more wheels and wherein each wheel is driven.

24.09, for a motor vehicle having a wheel arrangement comprising five or more wheels and wherein the drive means includes power dividing means in the form of differential gearing for driving each differential of a tandem pair of differentially driven axles.

24.1, for a motor vehicle having a wheel arrangement comprising five or more wheels and wherein are included two, longitudinally spaced wheels which are driven and further wherein is included means for disconnecting the drive to one of the two wheels.

24.11+, for a motor vehicle having a wheel arrangement comprising five or more wheels and wherein are included at least two, longitudinally spaced wheels which are driven.

38, for a motor vehicle of the steam traction engine type wherein not only the steering wheels, but also the remaining two wheels, are driven.

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

224, for a motor vehicle having a wheel arrangement comprising two wheels in tandem relationship and wherein at least one of the wheels is steerable and further wherein both wheels are driven.