Abstract: The invention is directed to an apparatus for performing the remotely-manlated installation and removal of a pass-through conduit unit into and out of a channel formed in a partition wall. A feed assembly is part of the apparatus and includes a plurality of parts assembled to form an elongated body in the channel. An articulated coupling such as a ball joint couples the conduit unit to the elongated body. A drive is operatively connected to the elongated body for displacing the latter in the channel. A crane has a holder for holding and remotely manipulating the conduit unit as the latter is installed or removed from the channel.

Abstract: Telescopic device includes a plurality of elongated members disposed one within the other in a fully telescoping condition thereof and including an innermost member, an outermost member and at least one member intermediate thereto, the members being displaceable in longitudinal direction relative to one another in a predetermined sequence, stop means for limiting travel of the members relative to one another, the at least one intermediate member being formed at a wall region located at one end thereof with a recess penetrating therethrough, a locking member disposed in the recess and having a dimension greater than the thickness of the wall region, one of the innermost and outermost members being formed with a depression at the end thereof located, in the fully telescoping position of the members, adjacent the other end of the elongated intermediate member, the locking member, in an extended condition of the intermediate member with respect to the one of the innermost and outermost members, being partly recei