Method of making a pipe with coupling conforming to pipe diameter
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United States of America Patent
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Jun 4, 2002
Grant Date -
N/A
app pub date -
Nov 23, 1998
filing date -
Nov 23, 1998
priority date (Note) -
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Abstract
A plastic pipe has a multiple layer wall construction including major and minor wall portions. The major wall portions are formed with first corrugations and are separated from one another by the minor wall portions which are formed with second corrugations and a bowed wall part which is of the same diameter as the first corrugations. The second corrugations are smaller in diameter than both the first corrugations and the bowed wall pipe. The wall construction is cut at the bowed wall part to produce two pipe sections which couple with one another. One of those pipe sections has an open ended bell converted from the bowed wall pipe and the other pipe section has a male spigot formed by the second corrugations of the wall construction.
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