US PATENT SUBCLASS 175 / 211
.~.~ Axially supported by tool shaft

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}
211.~.~ Axially supported by tool shaft

DEFINITION

Classification: 175/211

(under subclass 209) Apparatus in which the collecting or diverting means is mounted on a tool shaft and means are provided to restrain the same against axial movement in one direction along said tool shaft.