Implements or apparatus for applying pushing or pulling force – Method or apparatus for placement of conductive wire – Conduit snakes
Patent
1978-05-11
1979-10-16
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Method or apparatus for placement of conductive wire
Conduit snakes
F21C 2916
Patent
active
041711238
ABSTRACT:
A conductor pulling device for pulling conductors through a conduit. A pulling member for independently receiving conductors consists of an elongated strip of material having a plurality of spaced openings therealong. The openings have a top portion which is larger than the bottom portion to provide a biting portion of each opening for biting into insulation disposed about a conductor when a portion of the conductor is inserted in one of the openings. The biting portion of the openings allows the conductors to be detachably retained to the strip while the conductors are pulled through a conduit. The elongated strip is connected to a fish tape by an aperture in the strip which receives a hook portion of the fish tape. Additionally, a hood made of organic polymeric material may be used to hold the conductors in place when the conductors are inserted through respective openings in the elongated strip and to reduce friction with the conduit. Still further, there is disclosed a method of pulling a plurality of conductors through a passage using the above-described conductor pulling device to individually and independently retain the individual conductors to respective openings while pulling the pulling member through a passage. More specifically, the method comprising the steps of inserting a portion of a conductor through one of the openings and urging that portion into engagement with the biting portion so that the biting portion of the opening bites into the insulation of the conductor to insure a positive grip, connecting the strip to a pulling means and pulling the pulling means thereby pulling the strip with the conductors attached thereto through a conduit.
REFERENCES:
patent: 2648326 (1953-08-01), Epstein
patent: 2727720 (1955-12-01), Barth
patent: 3081977 (1963-03-01), Weisgerber
patent: 3330533 (1967-07-01), Blume
patent: 3858848 (1975-01-01), MacFetrich
patent: 3979106 (1976-09-01), Jaques
patent: 4101114 (1978-07-01), Martin et al.
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