US PATENT SUBCLASS 180 / 9.1
.~.~ Endless, flexible

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

7.1  DF  SPECIAL DRIVING DEVICE {6}
9  DF  .~ Portable track {2}
9.1.~.~ Endless, flexible {12}
9.21  DF  .~.~.~> Track substituted for drive wheel
9.22  DF  .~.~.~> Guided by walking attendant
9.23  DF  .~.~.~> With attendant station {1}
9.26  DF  .~.~.~> Convertible from wheel type {1}
9.32  DF  .~.~.~> With auxiliary obstacle surmounting means
9.34  DF  .~.~.~> With ground wheel {2}
9.4  DF  .~.~.~> With hitch
9.42  DF  .~.~.~> Combined
9.44  DF  .~.~.~> With track-related steering means {1}
9.48  DF  .~.~.~> Laterally extendable track
9.5  DF  .~.~.~> Track support mounted for vertical movement {2}
9.62  DF  .~.~.~> Toothed wheel drive {1}

DEFINITION

Classification: 180/9.1

(under subclass 9) Motor vehicles wherein the track is flexible and endless.

SEE OR SEARCH THIS CLASS, SUBCLASS:

184+, for a motor vehicle which includes a ski-like or runner member, which member is substitutable for support structure of the wheel type, and wherein the vehicle is provided with a propulsion element of the endless track type.

190+, for a motor vehicle which includes a ski-like or runner member and wherein the vehicle is provided with at least one surface-engaging propulsion element of the endless track type.

SEE OR SEARCH CLASS

172, Earth Working, 292, for an earth working implement propelled over the ground by an endless track motor vehicle.

280, Land Vehicles,

5.22, for a step or abutment ascending land vehicle including an endless track; subclass 28.5 for a nonmotor general utility land vehicle including wheel substitutes; or subclasses 124.128+, particularly subclass 124.129 for a general utility wheeled land vehicle wherein the running gear includes a wheel separately supported upon an individual stub axle by a longitudinally extending swinging support arm as commonly used in conjunction with an endless track but not claiming the endless track.

305, Wheel Substitutes for Land Vehicles, appropriate subclasses for flexible endless track type wheel substitutes.