Metal-to-metal seal structure

Details Metal-to-metal seal structure Metal-to-metal seal structure

1987-02-17

1987-12-01

Chambers, A. Michael

Fluid handling

Systems

Flow path with serial valves and/or closures

2511497, 277236, 277237R, F16L 3728

Patent

active

047097256

ABSTRACT:
In accordance with an illustrative embodiment of the present invention, a seal structure that provides a leak-proof metal-to-metal seal against an opposing seal surface includes an annular body having an inwardly directed flange and an outwardly directed flange, each flange having a seal foot on the outer portion thereof. The inner foot engages the seal surface first and produces elastic bending of the inner flange as a cantilever beam, together with a rotation of the annular body which reduces the gap below the outer seal foot to zero. Then as the seal structure is forced further against the seal surface, a counter-rotation is applied to the body to correct the first-mentioned rotation, and the lower end face of the body engages the seal surface to provide a limit stop. Internal fluid pressures produce additional sealing forces that vary in proportion to such pressures.

REFERENCES:
patent: 2405152 (1946-08-01), Kilchenmann
patent: 3176723 (1965-04-01), Hodgeman et al.
patent: 3373998 (1968-03-01), Bialkowski
patent: 3537478 (1970-11-01), Evans et al.
patent: 4371004 (1983-02-01), Sysolin et al.

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