Fail-safe bellows assembly with floating guard

Details Fail-safe bellows assembly with floating guard Fail-safe bellows assembly with floating guard

1987-10-02

1989-04-11

Arola, Dave W.

Pipe joints or couplings

With leakage or drip disposal

Weep holes

285 55, 285 93, 285114, 285226, 285351, F16L 5500

Patent

active

048199656

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 coupled to both flanges by pins radiating from the flanges that project into apertures in the guard with the apertures lareger than the O.D. of the pins to provide for relative movement of the flanges. A radial gap between the peripheries of the flanges and the guard is filled with a compressible foam layer, and aperture occluders are interposed between foam and guard to prevent extrusion through the apertures of a secondary seal sleeve that bridges the gap between the flanges.

REFERENCES:
patent: 1726403 (1929-08-01), Giesler
patent: 2983961 (1961-05-01), Titterton et al.
patent: 3001801 (1961-09-01), Downing
patent: 3976312 (1976-08-01), Murphree
patent: 4023832 (1977-05-01), Legille
patent: 4027902 (1977-06-01), Tanikawa
patent: 4258938 (1981-03-01), Davy

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