Implements or apparatus for applying pushing or pulling force – Method or apparatus for placement of conductive wire – Conduit snakes
Patent
1987-03-23
1989-01-31
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Method or apparatus for placement of conductive wire
Conduit snakes
E21C 2916
Patent
active
048011274
ABSTRACT:
A lightweight, portable device for pulling a plurality of relatively small wires through a conduit by the use of a rope attached thereto, without using a winch or necessitating the use of external power. This device comprises an elongate frame particularly adapted for use in a substantially upright position and having lower and upper ends, with a pivotally mounted operating lever operatively located adjacent a middle portion of the frame. At least one force-reacting component is utilized on the frame, over which the rope used with the device passes, for changing the direction of pull of the rope. Importantly, rope clamping means are utilized on the operaing lever for releasably grasping successive portions of the rope during the pulling process, and the operating lever is movable by one or more operators about its pivot point from a position in which it resides in a plane substantially parallel to and closely adjacent the plane of said elongate frame, to a position in which it resides at approximately right angles to the plane of the frame. Each such movement of the operating lever serves to cause several feet of rope to move with respect to the force-reacting component that serves to change the pull direction of the rope, and thus to cause the plurality of wires attached to the rope to move along the conduit for a like distance.
REFERENCES:
patent: 2599929 (1952-06-01), Mallasch
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patent: 2948510 (1960-08-01), Kieser
patent: 2990160 (1961-06-01), Foley
patent: 3201090 (1965-08-01), Jones
patent: 3291449 (1966-12-01), Hughes
patent: 3302929 (1967-02-01), Danielson et al.
patent: 3968952 (1976-07-01), Newell
patent: 4337924 (1982-07-01), Gebo
Renfro Julian C.
Watson Robert C.
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