Method of connecting pipes of plastics material of a double pipe system and a pipe connection made by the method
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United States of America Patent
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Feb 9, 1993
Issued Date -
N/A
app pub date -
Oct 25, 1991
filing date -
Jul 7, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of connecting pipes of plastics material of a double pipe system and a pipe connection made by the method. The inner pipes of the pipe system are connected to each other with a sleeve member by welding or gluing. Clamping jaws are used for holding and moving the inner pipes toward each other. The outer pipes are shorter than the inner pipes at least by the thickness of the two clamping jaws. For bridging the gap between the outer pipes, an expandable intermediate ring is inserted in the gap. An electric welding sleeve is used for connecting the outer pipes and the intermediate ring.
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