Implements or apparatus for applying pushing or pulling force – Method or apparatus for placement of conductive wire – Conduit snakes
Patent
1986-08-22
1987-09-22
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
046950389
ABSTRACT:
A means for pulling a length of fiber optic cable through an underground conduit is described wherein a lead puller is positioned at the exit of the conduit and one or more booster pullers are positioned at intermediate positions along the length of the conduit upstream from the exit thereof. The booster puller pulls the cable from the cable entry to the intermediate location and the cable is then fed downstream into the conduit with the lead puller being simultaneously operated to pull the conduit from the intermediate location to the exit. The lead and booster pullers each have a pair of hydraulically operated pinch wheels mounted thereon which may be selectively series connected or connected in parallel to achieve either maximum speed or maximum torque.
REFERENCES:
patent: 3688648 (1972-09-01), D'Amato
patent: 3774696 (1973-11-01), Horsch
patent: 4023466 (1977-05-01), Strassheimer
patent: 4152970 (1979-05-01), Hall et al.
patent: 4202250 (1980-05-01), Zevner et al.
patent: 4343151 (1982-08-01), Lorimor
patent: 4345736 (1982-08-01), Zevner et al.
patent: 4427207 (1984-01-01), Gafford
patent: 4456225 (1984-06-01), Lucas
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