Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent
1984-07-17
1987-06-09
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
175 62, 405154, E02F 518
Patent
active
046717030
ABSTRACT:
Apparatus for driving an open-ended pipe 7, which has a driving shoe 6 at its leading end, through the ground comprises a driving member 2, 3 to which percussive driving forces are applied by a driving mechanism. Instead of fitting the part 3 of the driving member directly into the rear end of the pipe 7 as is usual an intermediate component 8 is interposed between the pipe and the part 3. The component 8 has soil outlet openings 10 and a deflector 16 to allow soil which enters the pipe 7 through the shoe 6 as driving proceeds to pass through and out of the pipe without stopping the driving. The passage of the soil through the pipe 7 is assisted by water supplied under pressure through a pipe 11 to an annular duct 12 in the shoe 6, when the water flows inwards through nozzles 13 and then rearwards through the pipe 7 carrying the soil with it.
REFERENCES:
patent: 1993366 (1935-03-01), Englebright
patent: 2325565 (1943-07-01), Williams
patent: 2383496 (1945-08-01), Nebolsine
patent: 3402781 (1968-09-01), Sandberg
patent: 3945443 (1976-03-01), Baines
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