Double containment pipe mechanical joints

Details Double containment pipe mechanical joints Double containment pipe mechanical joints

1997-02-14

1999-08-10

Knight, Anthony

Pipe joints or couplings

Having plural independent paths

For concentric tubes or pipes

285179, 285342, 285354, F16L 3750, F16L 4704, F16L 17067

Patent

active

059347120

ABSTRACT:
A double containment coupling is used to form a mechanical joint between double containment pipes. The coupling has an inner primary member within an outer secondary member. Two seals, one on top of the other, are fitted on top of the primary pipe which extends beyond the secondary pipe of the double containment pipe. The coupling inner member is fitted over the primary pipe and seals. An inner locking nut is threaded on the coupling inner member outer surface pushing a thrust ring onto one of the seals, sliding the seal over the other seal compressing and energizing both seals so as to create a seal between the primary pipe and the coupling inner member. A first end of a closure member is threaded onto the outer surface of the coupling outer member. An outer locking nut threaded on a second end of the closure member compresses a seal between the closure member and the secondary pipe creating a seal between the closure member and the secondary pipe outer surface.

REFERENCES:
patent: 2951715 (1960-09-01), Bauer
patent: 3103737 (1963-09-01), Lennon et al.
patent: 3284114 (1966-11-01), McCord, Jr. et al.
patent: 3372715 (1968-03-01), Ashton
patent: 3498647 (1970-03-01), Schroder
patent: 3603912 (1971-09-01), Kelly
patent: 5547231 (1996-08-01), Sharp

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