Firesafe seal

Details Firesafe seal Firesafe seal

1984-07-12

1985-04-09

Weakley, Harold W.

Fluid handling

Destructible or deformable element controlled

Heat destructible or fusible

251159, 251172, 251174, 277 26, 277 34, F16K 1304

Patent

active

045095469

ABSTRACT:
A sealing assembly comprises three non-compressible and relatively movable members, the first and second members having a first elastomeric sealing element located between them, the second and third members having a second elastomeric element located between them to urge the second member away from the third member and towards the first member. Spaces are provided between the second and third members and are occupied by an elastomeric spring biassed to urge the second member away from the first member and a metallic spring biassed to urge the second member towards the first member. The force exerted by the elastomeric spring is greater than and opposite to that exerted by the metallic spring.
The sealing assembly is fire safe and particularly suitable for use in a ball valve.

REFERENCES:
patent: 3043469 (1962-07-01), Leach
patent: 3346234 (1967-10-01), Allen
patent: 3497177 (1970-02-01), Hulsey
patent: 3711062 (1973-01-01), Kirkwood

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