Unidirectional fluid valve

An exhalation valve 14 for a filtering face mask 10 has a flexible flap 24 that makes contact with a curved seal ridge 30 of a valve seat 26 when the valve 14 is in the closed position. The curvature of the seal ridge 30 corresponds to a deformation curve exhibited by the flexible flap 24 when secur...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	VAUGHN, GRANNIS B, FERGUSON, ANTHONY B, JAPUNTICH, DANIEL A, SEPPALA, HAROLD J
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING FIRE-FIGHTING HUMAN NECESSITIES LIFE-SAVING
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