(under the class definition) Apparatus comprising a plurality of cutting edges and a mechanical linkage or gearing which is located below ground and which is connected to the cutting edges to cause the cutting edges to move relative to each other.
(1) Note. Rotation of similar cutting elements, about spaced axes, whether parallel or not, is considered to be relative motion for classification in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
96, for a plurality of cutting edges which are moved relative to each other by individual below ground drive motors.
106, for below ground mechanical motion converting drive means drivingly interposed between a below ground drive motor and a tool.
170+, for above ground mechanical motion converting drive means for tool.
263+, and the search there noted, for devices having cutter elements which are laterally shiftable below ground. 298, for devices having a below ground hammer or impact device in which continuous unidirectional rotary motion of one telescoping member effects the impacting.
