(under subclass 22) Apparatus in which the travel of the vehicle is utilized to positively cause forward movement of the tool into or along the work.
SEE OR SEARCH CLASS
56, Harvesters, appropriate subclass for a harvesting device, and generally including a harvesting device which is advanced by a vehicle while operating.
171, Unearthing Plants or Buried Objects, appropriate subclass for an unearthing device which is generally advanced by a vehicle while operating.
172, Earth Working, appropriate subclass, and particularly
35+, for a driven earth working tool, generally advanced by a vehicle while operating.
299, Mining or In Situ Disintegration of Hard Material, 29+, for a machine for disintegrating hard material in situ and which is generally carried on a vehicle.
