US PATENT SUBCLASS 175 / 94
.~ With below-ground feed means

Current as of: June, 1999
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175 /   HD   BORING OR PENETRATING THE EARTH

92  DF  WITH BELOW-GROUND TOOL DRIVE PRIME MOVER {11}
94.~ With below-ground feed means

DEFINITION

Classification: 175/94

(under subclass 92) Apparatus including means positioned within the borehole which functions to feed the tool in the boring operation with, or relative to, the tool drive means.

(1) Note. For the meaning of "feed", see the class definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

162, and the search there noted for an above ground means to feed to tool.