Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – By means advancing along terrain and guiding pipe or cable...
Patent
1985-05-02
1987-12-22
Corbin, David H.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
By means advancing along terrain and guiding pipe or cable...
405154, 405175, 405179, 405181, F16L 102
Patent
active
047143819
ABSTRACT:
An apparatus and method for laying conduit within a trench, using a separable boxlike structure with end walls, side walls, a fill bin compartment internal of the boxlike structure for receiving fill material and dispensing fill material onto the bottom of the trench, and a conduit laying compartment through which conduit is fed for positioning on the bottom of the trench. The boxlike structure has a rigidly mounted tow bar which facilitates application of vertical, longitudinal and lateral forces on the boxlike structure to thereby enable an operator of the apparatus to maneuver it on grade and in alignment along the bottom of the trench. The boxlike structure is maintained on grade and in alignment with the assistance of a laser transmitter/receiver assembly and several grade-maintenance features. When an obstacle is encountered, the boxlike structure may be separated into an upper portion and lower portion so that the upper portion can be unconnected and removed from the lower portion. The laying of conduit within the trench can continue using only the lower portion until it is clear of the obstacle and the upper portion can be repositioned on the lower portion. The apparatus may also have a dewatering system, a conduit lowering system, and an assembly for regulating the level of the fill material deposited on the bottom of the trench.
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Corbin David H.
Hatch G. Brent
Hatch Susan W.
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