Method for cutting off water in pipeline and structure of connection portion in pipeline
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United States of America Patent
Stats
-
Jul 6, 1993
Grant Date -
N/A
app pub date -
Jul 29, 1991
filing date -
Feb 15, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cut-off material is provided, which includes an impermeable cutoff member (10, 70) provided with an expandable hose portion (18, 72) and a flange portion (20, 74) formed integrally with one end of the hose portion. The cutoff member is disposed in first and second pipelines, so that the flange portion is positioned within the first pipeline (12) and that the hose portion is positioned within the second pipeline (14). The cut-off member is maintained, for example, by a base (24,54,82) that is wound to be radially expandable, so that the flange portion is brought into liquid tight contact with the inner surface of the first pipeline and the hose portion extends within the second pipeline.
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