Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,...
Patent
1987-06-22
1988-08-30
Massie, Jerome
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
29255, 2940209, 29523, 138 97, 156 71, 156196, 156294, 175 53, 175230, 405156, F16L 100
Patent
active
047672366
ABSTRACT:
An existing underground sewer or other pipe is renovated by rupturing and radially expanding the pipe and installing a replacement pipeline within the ruptured pipe. The pipe is ruptured and radially expanded by introducing a plurality of radially expandable tubular members into the pipe so as to form a liner. Each member is then radially expanded so that the liner engages with and then ruptures the portion of the pipe adjacent thereto. The tubular members may be radially expanded by inflating a bag within the confines of the members.
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