Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent
1994-10-11
1996-04-09
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
175 53, 175 62, 405154, F16L 100
Patent
active
055055583
ABSTRACT:
Piping is laid horizontally underground, by horizontally entering a rod that is longer than the site, into the site, at the desired depth of the center of the piping tunnel, and then horizontally pushing that rod through the site, until its front end exits the back of the site. Then attaching three rods near the front end of the first rod, and bringing all four rods back through the site, until the first rod exits the front of the site, and the other three rods are embedded in their own paths in the site, with their front ends extending into the front of the site, and their back ends extending into the back of the site. Then, at the back of the site, attaching a push-pull type earth coring knife to the middle of the three rods, and connecting a front cutting and shielding means, between the two outer rods, so that it is situated immediately behind the front cutting portion of the coring knife. Then, placing a piece of the piping inside the back of the front cutting and shielding means so that it abuts the front cutting and shielding means and cannot be moved forward without it also moving the front cutting and shielding means forward. Then, placing a pulling and holding means over the back of the piece of pipe, so that it abuts the back of the piece of pipe, and cannot be moved forward without also moving the piece of pipe forward with it. Then attaching the pulling and holding means, between the two outer rods, near their ends. Then, by pulling the rods back through the site, pulling the coring knife, the pulling and holding means, the piece of pipe, and the front cutting and shielding means, into and through the site.
REFERENCES:
patent: 3874463 (1975-04-01), Hicks et al.
patent: 4410053 (1983-10-01), Masse
patent: 4874268 (1989-10-01), Akesaka
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