H - Electricity – 02 – G
Patent
H - Electricity
02
G
254/30
H02G 1/08 (2006.01) B65H 59/00 (2006.01) B65H 77/00 (2006.01) F16L 55/00 (2006.01) G02B 6/44 (2006.01)
Patent
CA 1156211
APPARATUS AND METHOD FOR INSTALLING LINE IN CONDUIT Abstract of the Disclosure Pull lines are utilized for installing electric wires in electrical conduit between junction boxes by attaching a pull line to the near end of a hollow-core line carrier having its forward end closed by a collapsible bag-like member of highly flexible plastic film or fabric. The bag-like member has a cross-section greater than that of the conduit and is inflatable through the trailing end of the line carrier so to maintain a yieldable continuous contact with the conduit interior wall about the line carrier as the carrier is moved through the con- duit in response to a pressure differential created at one end of the conduit. In one form, the line carrier is a tubular sleeve of rigid or shape retaining material to which the pull line to be installed is attached; and, in a second form, it is a roll of the line itself which is disposed within the open end of the bag-like member. In a modification of the first form, the bag-like member is collapsed for storage within the sleeve. -1-
377410
Osler Hoskin & Harcourt Llp
Thomas Industries Of Tennessee Inc.
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