Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,...
Patent
1992-03-06
1993-03-02
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
37 98, 405174, 405177, F16L 100
Patent
active
051904098
ABSTRACT:
Conventional cable-laying apparatus has been adapted for the removal of cable. A trenching plow blade is towed behind a bulldozer or the like. Mounted above the area of the blade is a powered cable-pulling assembly. Once an initial length of cable is excavated and routed to the cable pulling assembly, the equipment is advanced along the line of the cable to dig the trench, preferably just a small distance above the cable, such as about a foot, and the cable pulling assembly is driven to pull the cable from the ground behind the advanced blade. The cable may be routed to lie on the ground behind the advancing apparatus, or alternatively may be routed forward over the cab of the bulldozer onto a powered rewind reel. The cable pulling assembly includes a pulling wheel rotatably mounted to the blade support assembly, rotated by a hydraulic motor through a reduction gearbox. A series of rollers are mounted between two roller support arms. The roller support arms are connected to each other and pivotally mounted at one end to the blade support assembly, to rotate around a pivot pin. A hydraulic cylinder mounted between the blade support assembly and the roller support arms is operable to move the roller support arms to a closed position in which the rollers force the cable into the grooved portion of the pulling wheel, where teeth defined by the edges of squares rods into the cable to grip it securely for pulling.
REFERENCES:
patent: 2386615 (1945-10-01), Knapp
patent: 3648282 (1972-03-01), Kelly
patent: 4018058 (1977-04-01), Eichenseher et al.
patent: 4318638 (1982-03-01), Ptomersberger et al.
patent: 4685831 (1987-08-01), Mahoney
patent: 4744696 (1988-05-01), Vidler
patent: 5090141 (1992-02-01), Hall
Armstrong R. Craig
Taylor Dennis L.
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