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

1990-07-06

1992-02-11

Simmons, David A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

1563042, 1563043, 1563046, 1562739, 285 22, 2851331, 285138, 219535, B65H 6902, B29C 6500, F16L 4100

Patent

active

050873083

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: 3344491 (1967-10-01), Frederick
patent: 4479602 (1984-10-01), Fernandez et al.
patent: 4695335 (1987-09-01), Lyall
patent: 4696496 (1987-09-01), de Guelis et al.
patent: 4718698 (1988-01-01), Hill
patent: 4726869 (1988-02-01), Matsui et al.
patent: 4925218 (1990-05-01), Kunz et al.
patent: 4927642 (1990-05-01), Kunz

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