Pipe joints or couplings – Frangible element
Patent
1987-09-24
1989-08-08
Arola, Dave W.
Pipe joints or couplings
Frangible element
285 14, 285 93, 285114, 285226, 285301, F16L 3500
Patent
active
048546119
ABSTRACT:
A fail-safe bellows assembly eliminates the usual limit bolts and replaces them with a cylindrical guard that encircles the bellows element with its associated coupling flanges and interconnects said flanges so as to permit a limited safe magnitude of elongation and articulation. The guard is connected to one of said flanges, with a coupling or linking to the other flange that permits the desired safe freedom of movement. In one embodiment one of the flanges has the guard clamped to its periphery while the other flange couples to the guard with pins and apertures. Another embodiment uses pins projecting radially inwardly from the guard at one end, replacing the pins in the flange and cooperating apertures in the guard.
In addition to the guards, an elastic sleeve is joined to the periphery of each flange with a fluid-tight seal, and a vent passage through one flange interconnects the inter-flange space with the exterior for safe discharge of any fluid escaping from the bellows element.
REFERENCES:
patent: 1726483 (1929-08-01), Giesler
patent: 2983961 (1961-05-01), Titterton et al.
patent: 3001801 (1961-09-01), Downing
patent: 3219365 (1965-11-01), Webb
patent: 3976312 (1976-08-01), Murphree
patent: 4023832 (1977-05-01), Legille
patent: 4027902 (1977-06-01), Tanikawa
patent: 4221502 (1980-09-01), Tanikawa
patent: 4258938 (1981-03-01), Davy
Arola Dave W.
Unidynamics Corporation
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