(under the class definition) Apparatus comprising a motor or motor-actuated means for traversing an implement over the ground.
(1) Note. Self-propelled or tractor-propelled implements are common in this art. In order for a patent to be classified under this definition the propulsion means must be recited in some detail. The mere recitation of a motor is not enough. However, a broad reference to a wheel substitute such as a tracklaying means on a tractor is sufficient. Also a recitation of a relationship with the propulsion means such as the statement that an implement hitch arm is connected to a differential housing (as distinct from merely a rear axle housing) is enough.
SEE OR SEARCH THIS CLASS, SUBCLASS:
114+, for specific propelling means for driven tools.
256+, for a propulsion unit guided by a walking attendant or part of an articulated vehicle.
352, for manually driven stepper-type propulsion means. SEE OR SEARCH CLASS
74, Machine Element or Mechanism, appropriate subclasses for power transmitting means.
180, Motor Vehicles, appropriate subclasses for self-propelled vehicles.
280, Land Vehicles, appropriate subclasses for specific propelling means for land vehicles.
305, Wheel Substitutes for Land Vehicles, appropriate subclasses for track or stepper means for vehicles.