Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent
1982-07-02
1984-06-19
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
175 62, 254 29R, 405154, E21B 900
Patent
active
044551070
ABSTRACT:
To install a pipe or cable in the ground without disturbing the surface or the ground above the pipe or cable such for example as where a pipe is to be installed under a street, driveway or sidewalk, it is customary to place an underground pipe installing device in an operating trench on one side of where the pipe is to be installed, and to force a solid installation rod through the ground to a target trench on the opposite side. The pipe or cable to be installed is then connected to the installation rod, and the rod is withdrawn to install the pipe or cable in the hole made by the rod.
To drive the rod through the ground it is customary to grip or clamp the rod firmly on opposite sides, with a sufficient pressure to force the rod through the ground when an axially directed force is exerted on it. To avoid exerting bending forces on the rod it is desirable that the rod be gripped firmly at locations precisely opposite each other, and that sufficient radial clamping forces be exerted on the rod to prevent the jaws from slipping longitudinally on the rod. The installation rod is thus firmly clamped between the jaws, and the rod is then moved longitudinally by force exerted through the jaws to force it through the ground toward the target trench.
REFERENCES:
patent: 3834668 (1974-09-01), Casey
patent: 3988003 (1976-10-01), Schosek
patent: 3998428 (1976-12-01), Miles
patent: 4251058 (1981-02-01), Schosek
patent: 4274758 (1981-06-01), Schosek
Elephant Industries, Inc.
Taylor Dennis L.
Wilson Alfred E.
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