Surgery – Respiratory method or device – Face mask covering a breathing passage
Reexamination Certificate
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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DeMille Danton
Rueppell R. Christopher
TVI Corporation
Whiteford Taylor & Preston
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