Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent
1995-09-25
1997-07-29
Neuder, William P.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
F16L 100
Patent
active
056516398
ABSTRACT:
The invention provides an apparatus and a method for installing a pipe in a pre-bored hole. According to one aspect of the invention, the apparatus comprises a plug having a rear cylindrical portion with external threads engaged with internal threads of a front portion of a plastic pipe section. A front portion of the plug includes a pulling attachment, and a rear portion of the pipe section extends beyond the rear portion of the plug for attachment to a pipe to be towed through the hole. According to another aspect of the invention, the apparatus comprises a plug having a pulling attachment at a front end, a rear portion with external threads, a lengthwise external cutaway portion on the rear portion, and a slot extending radially through the rear portion. The lengthwise external cutaway portion forms an edge for cutting into an interior surface of a plastic pipe and the slot forms a suitable collection space for collecting pieces of plastic cut from the interior of the pipe by engagement of the threads. The invention also provides an apparatus and method for simultaneously installing several underground pipes in a pre-bored hole. This apparatus comprises a mounting plate having a generally flat plate including a plurality of spaced, crucifix-shaped openings extending through the plate. Several pulling devices can be secured to the mounting plate by sliding a plurality of chains, each chain attached to one pulling device, into one of the openings.
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TT Technologies catalog -pp. 28 and 29 Hammerhead Mole Accessories -Feb. 95', pp. 11-20.
Crane Robert
Wentworth Steven W.
Earth Tool Company L.L.C.
Meyers Philip G.
Neuder William P.
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