Rehabilitation of water supply pipes
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United States of America Patent
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-
Nov 11, 2003
Grant Date -
N/A
app pub date -
Jan 22, 2002
filing date -
Apr 15, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Device for use in rehabilitation of water supply pipes includes a tubular liner (10) which is deployed through a pipe (11) for example by a line attached to a messenger pig which is propelled through the pipe. The liner (10) has a multi-lobed pleated cross-section, and is of a polyolefin elastomer material, e,g, a substantially linear ethylene inter-polymer. The liner is extruded and die drawn during extrusion to produce a reduced diameter highly oriented structure.
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