US PATENT SUBCLASS 175 / 100
.~ Discharge passage for motive fluid directed toward bore entrance

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}
100.~ Discharge passage for motive fluid directed toward bore entrance

DEFINITION

Classification: 175/100

(under subclass 92) Apparatus in which the motor is fluid operated and means are provided for exhausting a portion of the fluid which operates the motor from the motor or motor housing into the bore in a direction extending toward the bore entrance.

SEE OR SEARCH THIS CLASS, SUBCLASS:

324, for a tool shaft which may be provided with means to induce fluent flow comprising fluid outlet ports in said shaft extending in a direction toward the bore entrance.