(under the class definition) Jack especially designed for driving or pulling pipes, pump rods, piles, or the like, other than by impact.
SEE OR SEARCH THIS CLASS, SUBCLASS:
43, and 44, for some analogous structures for shifting rails longitudinally.
SEE OR SEARCH CLASS
29, Metal Working,
237, for apparatus for assembling or disassembling couplings and conduits.
173, Tool Driving or Impacting, 141+, and see the search notes therein for an advance causing or controlling means in combination with a tool-driving or-impacting device.
249, Static Molds,
213, for tie rods or wires having a force multiplying component permanently attached thereto or remaining with the rods or wires when they are in use with a static mold.
405, Hydraulic and Earth Engineering,
184, for methods and apparatus for advancing a length of pipe through an earth formation; and subclasses 232+ for impact devices and other means for forcing a pile into the earth when the structure of the pile is involved.
