Pipe joints or couplings – With assembly means or feature – Molded joint facilitator
Patent
1985-11-08
1988-01-12
Callaghan, Thomas F.
Pipe joints or couplings
With assembly means or feature
Molded joint facilitator
285 31, 285398, 156294, 219544, F16L 4702
Patent
active
047186984
ABSTRACT:
An apparatus and method for forming a fusion welded butt joint between thermoplastic pipe sections. Thermoplastic tubular insert sleeves having end flanges are inserted into the ends of the pipe sections with the flanges located in abutting relation. A coupling collar mounting a heating device is slid along one of the pipe sections into overlying relation with the butt joint formed by the engaged flanges. The heating device is energized to fusion weld the coupling sleeve to the pipe sections and to the flanges. The insert sleeves internally support the butt joint area of the pipe sections against thermal sagging during the fusion welding, and the flanges in their molten state tend to flow and compensate for dimensional discrepancies in the pipe sections.
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Callaghan Thomas F.
R. W. Lyall & Company, Inc.
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