US PATENT SUBCLASS 175 / 171
.~ With installing casing


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

170  DF  WITH TOOL DRIVE PRIME MOVER OR ABOVE-GROUND MECHANICAL MOTION CONVERTING DRIVE MEANS {5}
171.~ With installing casing


DEFINITION

Classification: 175/171

(under subclass 170) Apparatus including a drive means for a tool which is particularly adapted to installing a separate casing, or a means is specified in addition to the tool drive means for the purpose of installing a casing.

SEE OR SEARCH CLASS

405, Hydraulic and Earth Engineering,

133, for a method or apparatus for forming a shaft with a lining; subclasses 138+ for a means or method of forming a lined tunnel; subclasses 154+ for a method or apparatus for laying pipe or cable into a submerged or subterranean location; and subclasses 232+ for a method or apparatus for installing a hollow pile shell in the earth.