Pipe swivel joint for ambient and cryogenic temperatures

Details Pipe swivel joint for ambient and cryogenic temperatures Pipe swivel joint for ambient and cryogenic temperatures

1980-11-10

1982-10-26

Arola, Dave

Pipe joints or couplings

With fluid pressure seal

Swivel with flange in socket

285 14, 285187, 285276, 277 26, F16L 1700

Patent

active

043558275

ABSTRACT:
A swivel joint for connecting together a pair of pipes and for transferring fluid between the pipes at ambient temperatures and at cryogenic temperatures. A cryogenic seal between the joint's relatively rotatable inner and outer elements prevents fluid leakage at cryogenic temperatures, and an ambient seal assembly between the joint elements provides a seal at ambient temperatures and prevents fluids from contacting the cryogenic seal. The ambient seal assembly includes an elastomeric O-ring retained in the outer element, and an annular sealing ring fastened to the inner element and spring-biased towards the O-ring. At ambient temperatures the sealing ring is held against the O-ring in a fluid-tight manner. As the temperature decreases, a plurality of rods or wires, or an annular sleeve, having a high coefficient degree of linear expansion, contracts and pulls the annular sealing ring away from the adjacent O-ring to prevent wear of, and other damage to, the O-ring at low temperatures.

REFERENCES:
patent: 1666495 (1928-04-01), Hodgkinson
patent: 3361430 (1968-01-01), Reid
patent: 3433488 (1969-03-01), Grantom
patent: 4139220 (1979-02-01), Faccon
patent: 4221408 (1980-09-01), Lochte et al.

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