Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent
1998-04-02
2000-08-29
Bagnell, David
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
175 53, E02F 510
Patent
active
061098329
ABSTRACT:
A method and an apparatus for new installation or bursting and replacement of underground pipelines, without the necessity of trenches. This method and apparatus allows for the installation without the need for large excavations at the end point of the line and allows for nondestructive termination at an existing vault, structure or manhole without having to rebuild the structure, vault or manhole. The apparatus includes a head assembly that breaks apart fracturable pipe and expands the hole to accommodate the desired size of pipe. Because of the method of applying forces, the expansion of pipe diameter can be very substantial. Because of the head assembly, the head can be disassembled as the pipe and head enter a manhole, vault, structure or limited space and thus no need to excavate the vault or structure or create a large end excavation is necessary, thus saving time and money and avoiding disruption of traffic in street locations.
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Bagnell David
Smith J. Mark
Walker Zakiya
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