Pneumatic sealing system for protection masks

Details Pneumatic sealing system for protection masks Pneumatic sealing system for protection masks

2007-09-25

2007-09-25

DeMille, Danton (Department: 3771)

Surgery

Respiratory method or device

Face mask covering a breathing passage

C128S201270

Reexamination Certificate

active

10732268

ABSTRACT:
A pneumatic sealing system for a gas mask, which seals the mask to the face of the user by using a pump that employs air from inside the gas mask to variably inflate a mask seal during the breathing cycle. A double diaphragm pump, which has a driving diaphragm and a driven diaphragm, is connected to the inflatable mask seal via a hose duct. The double diaphragm pump is driven by the pressure difference inside the gas mask. During inhalation, the driving diaphragm fills with ambient air and the driven diaphragm fills with filtered air. During exhalation, the driving diaphragm and the driven diaphragm compress, releasing and trapping air in the mask seal.

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