Plastic pipe for sewer pipe reconstruction
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United States of America Patent
Stats
-
Dec 10, 1991
Grant Date -
N/A
app pub date -
Jun 25, 1990
filing date -
Jun 28, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A plastic pipe for sewer pipe reconstruction has at least one spigot, the outer diameter of which is smaller than the outer diameter of the pipe. It has furthermore a socket end the outer diameter of which is substantially equal to the outer diameter of the pipe. Its inner diameter is substantially equal to the outer diameter of the spigot. In order to construct such a pipe that, while having high crushing strength, it has low weight and insensitivity to damage in the outer area, and can be used for short-pipe relining, the pipe and the at least one spigot have annular protrusions. Furthermore, the outer diameter of the protrusions of the spigot corresponds substantially to the inner diameter of the socket end. The pipe is very rigid.
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Family
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Cited Art Landscape
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