Inflatable apparatus for sealing a pipeline
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United States of America Patent
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May 11, 1999
Grant Date -
N/A
app pub date -
Jun 5, 1998
filing date -
Jun 5, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
A pipe sealing apparatus insertable inside a pipe and inflatable therein to prevent fluid flow through the pipe includes an elongated inflatable sleeve of elastomeric material and an elongated outer sleeve substantially surrounding the inflatable sleeve. The inflatable sleeve is shiftable with respect to the outer sleeve during inflation of the inflatable sleeves. An intermediate sleeve, shiftable with respect to each of the inflatable sleeve and outer sleeve, may be provided between the inflatable sleeve and the outer sleeve. The ends of the inflatable, intermediate, and outer sleeves may be folded and clampingly sealed to each other to provide a fluid-tight seal at opposite ends of the sealing apparatus. A flexible cylindrical member may extend through the inflatable sleeve between the opposite ends thereof, an inflatable space being defined between the cylindrical member and the inflatable sleeve.
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