(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.
