Pressure balanced metallic S-seal

Details Pressure balanced metallic S-seal Pressure balanced metallic S-seal

1988-08-17

1989-08-08

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277200, 277205, F16J 1528, F16J 1508

Patent

active

048546003

ABSTRACT:
A pressure balance sealing ring having a substantially S-shaped, resilient cross section including two oppositely facing convolutions, a central leg coupling the convolutions and a pair of outer legs, each extending from one of the convolutions. The ring is advantageously formed of metal and seals against opposed axially facing but offset surfaces in an annulus between two concentric pipes or opposed axially facing surfaces at the interface formed by two aligned pipes. Each outer leg has a substantially circular sealing line, these sealing lines being radially offset from one another, adjacent the free distal edge of each leg, and spaced from the convolutions. In a modified embodiment, the sealing ring has more than two convolutions and additional legs to connect them. In another series of modified embodiments, the sealing ring has one or two restraining rings rigidly coupled to one or both of the outer legs to ensure the desired direction of torsional deflection under the action of the differential pressure. The sealing ring can also have its sealing lines axially offset as an alternative to them being radially offset.

REFERENCES:
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patent: 3857572 (1974-12-01), Taylor et al.
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patent: 4241491 (1980-12-01), Hopp
patent: 4457523 (1984-07-01), Halling et al.

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