Twin positive and negative seal pipe fittings

Details Twin positive and negative seal pipe fittings Twin positive and negative seal pipe fittings

1977-07-18

1978-12-19

Callaghan, Thomas F.

Pipe joints or couplings

With fluid pressure seal

Wedged gasket

285156, 285351, 2853822, F16L 1314

Patent

active

041303024

ABSTRACT:
The invention provides a seal for pipe joint couplings, the present seal comprising a sleeve member receivable over the pipe joint and extending for a relatively short distance along each of the pipes. The seal further comprises an annular pressure chamber formed in the inner wall of the sleeve facing each of the pipes, the outer surface of each pipe acting to define the chamber, each pressure chamber being partially positioned into two sub-chambers by an inwardly extending annular bead formed on the sleeve, the sub-chambers each having packings such as O-rings disposed therein.

REFERENCES:
patent: 1861755 (1932-06-01), Rasmussen
patent: 1869021 (1932-07-01), Perks
patent: 3041077 (1962-06-01), Osterloh et al.
patent: 3244441 (1966-04-01), Caudle
patent: 3429587 (1969-02-01), Kish
patent: 3596939 (1971-08-01), Gibson
patent: 3600010 (1971-08-01), Downs
patent: 4055359 (1977-10-01), McWethy

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