Method of connecting pipes of plastics material of a double pipe

Details Method of connecting pipes of plastics material of a double pipe Method of connecting pipes of plastics material of a double pipe

1991-10-25

1993-02-09

Arola, Dave W.

Pipe joints or couplings

With assembly means or feature

Molded joint facilitator

285423, 285398, 2851331, 285138, F16L 4700

Patent

active

051848503

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.

REFERENCES:
patent: 3002871 (1961-10-01), Tramm
patent: 3987276 (1976-10-01), Vogelsanger
patent: 4441743 (1984-04-01), Steenbergen
patent: 4629216 (1986-12-01), Pedersen
patent: 4718698 (1988-01-01), Hill
patent: 5087308 (1992-02-01), Wermelinger

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