Pipe plug and method
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United States of America Patent
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Jun 30, 1998
Grant Date -
N/A
app pub date -
Dec 13, 1996
filing date -
Dec 13, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device for plugging a pipe includes a resilient, hollow body member that expands with the application of internally applied pressure to block the pipe. The body member has at one end a conical shaped wall with an apex that points inward. At ambient pressure, the diameter of the body member is less than the diameter of the pipe into which it is inserted. The diameter of the body member increases as the internal pressure increases, and the length of the conical shaped wall decreases.
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