Fire-safe seal for swivel joint

Details Fire-safe seal for swivel joint Fire-safe seal for swivel joint

1981-12-10

1984-02-14

Scanlan, Jr., Richard J.

Pipe joints or couplings

Swivel

Pipe in socket type

285379, 285108, F16L 2700, F16L 2102, F16L 1700

Patent

active

044312172

ABSTRACT:
A fire-safe seal for use in a swivel joint in a pressurized fluid system subject to fire risk, the seal having both a metal anti-extrusion ring and an annular resilient non-metallic seal member to provide essentially zero fluid linkage at normal operating temperatures, and the anti-extrusion ring to provide an extremely low rate of leakage in the event high temperature should destroy the resilient seal member. A curved spring or other metal anti-cocking device biases the anti-extrusion ring tightly against the junction of a male and a female joint to ensure that the ring remains in position after the resilient seal member is destroyed to prevent leakage through the junction.

REFERENCES:
patent: 1795867 (1931-03-01), Kuhn
patent: 2558087 (1951-06-01), Holl
patent: 3301568 (1967-01-01), Perry
patent: 3408095 (1968-10-01), Moore

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