Pipe joints or couplings – With assembly means or feature – Molded joint facilitator
Patent
1987-06-19
1989-08-01
Arola, Dave W.
Pipe joints or couplings
With assembly means or feature
Molded joint facilitator
285 93, 285423, 219535, F16L 4702
Patent
active
048529141
ABSTRACT:
A polyethylene pipeline including a plurality of prefabricated pipes of predetermined diameter fused on one end to respective bell fittings to form prefabricated bell and spigot pipe assemblies. The bell connector includes an enlarged in diameter bell connector formed with a socket having an internal diameter for telescopical receipt of the second end of the adjoining pipe length and includes an increased in diameter interior gland for receipt of a helical heating coil. The heating coil is constructed of an electrical resistant wire coated with an electrical insulative coating which is, in turn, coated with a medium density polyethylene coating. The terminal ends of the wire is coupled with electrical connectors protruding to the outside of the bell connector.
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Arola Dave W.
Milfuse Systems, Inc.
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