Coupling for lined pipe

Details Coupling for lined pipe Coupling for lined pipe

1979-06-11

1981-07-07

Callaghan, Thomas F.

Pipe joints or couplings

With casing, lining or protector

Lined

29458, 29525, 285369, 2853822, F16L 914, F16L 1314

Patent

active

042770912

ABSTRACT:
Disclosed are coupling joints for interconnecting the ends of metal conduit sections having plastic liners to form a continuously lined conduit and methods for making such joints. The opposed open ends of lined pipe are fitted with flanged end face collars which cover the end faces of the pipe and the open ends are then joined in an abutting relationship within a coupling sleeve by interference fit coupling. The coupling sleeve carries an internal sealing band which mates with the outer edges of the opposed collars to fully seal the joint and the ends of the coupling sleeve are radially crimped into a corresponding groove in the pipe to mechanically interlock the joint. Fully lined couplings are also formed by fitting an end face collar in the pin end of one lined conduit and interference fitting the pin end into an unlined bell on a lined conduit.

REFERENCES:
patent: 1188485 (1916-06-01), Pruyn
patent: 2233734 (1941-03-01), Ely et al.
patent: 2241517 (1941-05-01), Moise
patent: 3149861 (1964-09-01), Larsson
patent: 3253841 (1966-05-01), Ahmad
patent: 3266821 (1966-08-01), Stafford
patent: 3298716 (1967-01-01), Taylor et al.
patent: 3343252 (1967-09-01), Reesor
patent: 3466738 (1969-09-01), Mount
patent: 3474834 (1969-10-01), Carey
patent: 3516690 (1970-06-01), Kreig
patent: 3596931 (1971-08-01), Mishler
patent: 3893718 (1975-07-01), Powell
patent: 4064619 (1977-12-01), Echols et al.

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