(under the class definition) Apparatus having a means to unearth a plant or buried object and including a sensing means actuated by said plant or object either before or after it is unearthed and a means which is responsive to actuation of said plant or object sensing means to drive a portion of said apparatus.
SEE OR SEARCH CLASS
172, Earth Working,
5+, for earth-working apparatus comprising automatic power-control means and means sensing an obstruction such as a plant.
