Uni-directional fluid valve

Fluid handling – Line condition change responsive valves – Direct response valves

Patent

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Details

12820524, 12820615, F16K 1516

Patent

active

056877676

ABSTRACT:
A uni-directional fluid valve particularly for use as an exhalation valve for a filter mask comprises a flexible flap attached at one end to a concave portion of a seat. The mounting of the flap imparts to it a transverse curvature, stiffening the flap sufficiently for it to remain seated in the absence of a pressure differential across it even when orientated with the seat above the flap.

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