US PATENT SUBCLASS 172 / 256
PROPULSION UNIT GUIDED BY WALKING ATTENDANT OR PART OF ARTICULATED VEHICLE

Current as of: June, 1999
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172 /   HD   EARTH WORKING

256PROPULSION UNIT GUIDED BY WALKING ATTENDANT OR PART OF ARTICULATED VEHICLE {4}
257  DF  .~> Riding attendant
258  DF  .~> Endless track or single driven wheel
259  DF  .~> With vertically adjustable wheel
260  DF  .~> With actuator for moving earth working element vertically

DEFINITION

Classification: 172/256

(under the class definition) Apparatus comprising (1) a self-propelled vehicle having means such that an attendant walking on the ground may guide the vehicle, or (2) a vehicle made up of a self-propelled frame section having a ground wheel and another frame section having a ground wheel connected to the self-propelled section by a pivot means providing a vertical axis, the self-propelled section when in use being unstable except for its connection to the other section.

(1) Note. The disclosure of an unstable tractor (e.g., one or two wheel) which is guided by a walking attendent will be classified under this definition even though (1) the guiding means (e.g., handles) or (2) the motor, is not claimed, provided the claim includes some recitation of (1) the tractor or tractor frame, or (2) the handles, respectively.

SEE OR SEARCH THIS CLASS, SUBCLASS:

42+, for an implement with a drive means for a tool or cleaner and guided by a walking attendant.

329+, for an implement comprising a vehicle other than a self-propelled vehicle and guided by a walking attendant.

SEE OR SEARCH CLASS

56, Harvesters, 14.7+, for a harvester deriving its motive power from a tractor to which it is hitched, and 16.7+, for a motor-driven lawn mower guided by a walking attendant.

180, Motor Vehicles,

19.1+, for a motor driven vehicle guided by a walking attendant.

280, Land Vehicles,

47.11, for a wheeled vehicle in which the wheel is steered by the attendant.