Fibrous filtration face mask having a new unidirectional fluid valve

A filtering face mask that has a mask body and an exhalation valve. The mask body is adapted to fit over the nose and mouth of a wearer. The exhalation valve is attached to the mask body and has a valve seat that includes a seal surface and an orifice that is circumscribed by the seal surface. The v...

Ausführliche Beschreibung

Bibliographische Detailangaben

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