US PATENT SUBCLASS 175 / 97
.~ With means to anchor prime movers support to bore wall

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}
97.~ With means to anchor prime movers support to bore wall {1}
98  DF  .~.~> Expansible anchor {1}

DEFINITION

Classification: 175/97

(under subclass 92) Apparatus including means to secure the motor support to the bore wall against either axial or rotary movement or both.

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

SEE OR SEARCH THIS CLASS, SUBCLASS:

230, and search there noted for means to anchor a boring means to the bore wall.