US PATENT SUBCLASS 175 / 231
WITH MEANS MOVABLE RELATIVE TO TOOL BELOW GROUND TO CONTROL ECCENTRIC FLUID EMISSION


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

231WITH MEANS MOVABLE RELATIVE TO TOOL BELOW GROUND TO CONTROL ECCENTRIC FLUID EMISSION


DEFINITION

Classification: 175/231

(under the class definition) Apparatus including a means which is movable relative to a tool while the tool is below ground to change the direction of flow nonsymmetrically relative to the bore axis of fluid discharging from the tool, usually to alter the direction of boring.