Pipe joints or couplings – With casing – lining or protector – Lined
Patent
1981-09-21
1984-07-03
Callaghan, Thomas F.
Pipe joints or couplings
With casing, lining or protector
Lined
156172, 285156, 285177, 285179, 285398, 285405, 285423, 285DIG2, F16L 4700
Patent
active
044575424
ABSTRACT:
A plastic pipe element comprises an inner one-piece liner of thermoplastic material. The liner is formed so as to include at least one cylindrical leg having a free outer end and inner end disposed intermediate opposite ends of the liner. At least one pipe section is formed comprising an inner thermoplastic lining and a fiber reinforced outer layer. That pipe section is bonded to an outer surface of the cylindrical leg such that an inner end edge of the pipe section overlies the liner. A sheet of fiber reinforced thermosetting resin molding compound is applied externally around the inner end edge of the pipe section and is subjected to pressure and heat to form the sheet into a desired shape. Thereafter, the sheet is allowed to harden. Elements formed in this manner include a T-fitting, a pipe flange, a 90.degree. fitting, a reducer fitting, a 45.degree. fitting, and a pipe cap.
REFERENCES:
patent: 2878038 (1959-03-01), Noland
patent: 3002871 (1961-10-01), Tramm et al.
patent: 3540223 (1970-11-01), Ebbe
patent: 3561795 (1971-02-01), Becher
patent: 3765979 (1973-10-01), Thomas
patent: 3975039 (1976-08-01), Penneck et al.
patent: 4043857 (1977-08-01), Byrne et al.
patent: 4106797 (1978-08-01), Michael
patent: 4257630 (1981-03-01), Bartell et al.
Matthews Kenneth J.
Shaefer Robert R.
Callaghan Thomas F.
Nibco Inc.
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