Pipe seal with a sheet-metal casing bendable around a pipe
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United States of America Patent
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-
Mar 2, 1999
Issued Date -
N/A
app pub date -
Nov 3, 1997
filing date -
Jul 31, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device for sealing the gap or void between the outer circumference of a pipe and a hole in a wall the pipe passes through includes a sheet metal casing flexible enough to be bent around the pipe. The inside wall of the casing includes spaced apart inner directed radial projections for containing a swelling agent that is heat activated for filling the void between the housing and pipe in a manner overlapping the gap between the pipe and the wall.
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