US PATENT SUBCLASS 175 / 210
.~.~ Anchored to bore wall

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

207  DF  WITH ABOVE-GROUND MEANS FOR HANDLING DRILLING FLUID OR CUTTING {9}
209  DF  .~ Fluid or cuttings directing or receiving means engaging bore entrance {2}
210.~.~ Anchored to bore wall

DEFINITION

Classification: 175/210

(under subclass 209) Apparatus in which said means extends into the bore and is held in sealed engagement with the bore wall.