Valve flapper with bands of different deflectibility

Details Valve flapper with bands of different deflectibility Valve flapper with bands of different deflectibility

1995-09-11

1997-09-02

Ferensic, Denise L.

Fluid handling

Line condition change responsive valves

Direct response valves

92104, 92105, F16K 1514

Patent

active

056621426

ABSTRACT:
A circular valve flapper for an unidirectional gas flow system, such as a breathing system. It has a central support an edge seal adapted to bear against a valve seat to stop the flow, and retract from the valve seat to permit flow. The flapper includes four concentric annular bands, the first being continuous with the support. The first and third bands are readily deflectable, and the second and fourth bands are relatively stiff. One, and preferably both, of the first and third bands are rolling diaphragms. The readily deflectibility of the first and third bands results in a substantial axial deflection of the edge seal, and a reduction of low frequency noise.

REFERENCES:
patent: 2646063 (1953-11-01), Hayes
patent: 2687146 (1954-08-01), Ferguson
patent: 2777464 (1957-03-01), Mosley
patent: 2936779 (1960-05-01), Kindred
patent: 3085591 (1963-04-01), Schneider
patent: 4838262 (1989-06-01), Katz
patent: 4987740 (1991-01-01), Coleman
patent: 5231982 (1993-08-01), Harrison et al.
patent: 5384928 (1995-01-01), Khoury

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