(under the class definition) Apparatus including a means necessarily located above ground which functions to feed the tool in the boring operation.
(1) Note. For the meaning of "feed" see the class definition.
(2) Note. A handle for directly applying force to a tool shaft without a mechanical motion conversion is excluded. However, a simple relatively movable lever or gear for example would be included even though operated by hand.
SEE OR SEARCH THIS CLASS, SUBCLASS:
27, for automatic control of advance or applied tool weight.
51, for preset control of advance or retraction for tool drive or rotary tool.
94, for below ground tool feed means in combination with a below ground tool drive motor. 108, for common drive or advancing means for concurrently boring along laterally spaced axes.
113, for a single mechanical movement which feeds and rotates a tool.
122, for means to feed a tool drive means.
203, for above ground means to advance or retract a boring means.
321, for below ground feed means incorporated in an axially telescopic tool drive shaft.
SEE OR SEARCH CLASS
144, Woodworking,
92+, for a boring feed.
173, Tool Driving or Impacting,
141+, for a tool advance causing or controlling means.
408, Cutting by Use of Rotating Axially Moving Tool, appropriate subclasses, particularly 129+, for means for feeding a boring or drilling tool, not peculiar to earth boring usage.
