Respirator negative pressure fit check devices and methods

Respirator negative pressure fit check devices and methods

A respiratory mask body defining a breathable air zone for a wearer and having a shut-off valve is provided. In an exemplary embodiment, the mask body includes one or more inlet ports configured to receive one or more breathing air source components. The shut-off valve is operable between a closed p...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Mittelstadt, William A, Raines, III, Carl W, Abel, Nathan A, Cowell, Michael J, Blomberg, David M, Lageson, Kent E, Dwyer, Gary E, Cosgrove, Dylan T, Li, Chaodi, Stein, David R, Insley, Thomas I, Svendsen, Michael J
Format: Patent
Sprache:eng
Schlagworte:
DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
FIRE-FIGHTING
HUMAN NECESSITIES
LIFE-SAVING
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Beschreibung
Zusammenfassung:A respiratory mask body defining a breathable air zone for a wearer and having a shut-off valve is provided. In an exemplary embodiment, the mask body includes one or more inlet ports configured to receive one or more breathing air source components. The shut-off valve is operable between a closed position and an open position, and when in a closed position the shut-off valve prevents fluid communication between the one or more inlet ports and the breathable air zone and the shut-off valve returns to an open position in the absence of an applied force.