US PATENT SUBCLASS 175 / 202
ABOVE-GROUND MEANS FOR RELATIVELY MOVING BELOW-GROUND TOOL ELEMENTS


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

202ABOVE-GROUND MEANS FOR RELATIVELY MOVING BELOW-GROUND TOOL ELEMENTS


DEFINITION

Classification: 175/202

(under the class definition) Apparatus comprising the combination of a tool having relatively movable tool elements and a means necessarily remaining outside the mouth of the bore, which is adapted to be actuated to cause relative movement between the tool elements, while the tool is located within the bore.

(1) Note. The tool elements must be positively relatively

moved by the moving means to be classified herein. Those tool elements which are relatively moved by the manipulation of a tool drive shaft only, relative to which they are movably attached (e.g., centrifugal, or bottom engagement expansion), are excluded from this subclass.

(2) Note. Structure in addition to a mere connecting rod or cable must be claimed as the above ground means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

173, for drive means including diversely actuated shafts extending into a bore.