Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – With protection or indication of pipe or trench
Patent
1990-08-13
1992-03-17
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
With protection or indication of pipe or trench
405154, E03B 710
Patent
active
050963325
ABSTRACT:
A method for preventing water leakage into and out from a pipeline utilizes an injection material and a liner. The injection material exhibits fluidity and hardenability. The liner includes an elastically deformable sleeve having an outer diameter smaller than the inner diameter of the pipe and a plurality of elastically deformable and successively circumferentially extending projection portions formed at axial intervals on the circumferential surface of the sleeve; a sheetlike base placed inside the sleeve in a radially expandable, wound cylindrical form; fixing means for maintaining the base in a substantially cylindrical form when the base is radially expanded inside the sleeve; and check valve means defined by the sleeve and the base when the base is radially expanded. The check valve means permits the injection material to flow from the inside of the base into the space between the projection portions in the axial direction.
REFERENCES:
patent: 1200119 (1916-10-01), Keeler
patent: 4091630 (1978-05-01), Nenloto et al.
patent: 4815896 (1989-03-01), Fox et al.
patent: 4874268 (1989-10-01), Akesaka
patent: 4921374 (1990-05-01), Stutzman
Kabushiki Kaisha Iseki Kaihatsu Koki
McBee J. Russell
Taylor Dennis L.
Toa Grout Kogyo Kabushiki Kaisha
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