Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1992-12-14
1994-10-25
Asher, Kimberly L.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820418, 12820525, 12820524, 137 811, A61M 1600, A62B 704, A62B 902, F16K 3126
Patent
active
053579496
ABSTRACT:
An oxygen breathing apparatus for protection of aircraft passengers against aircraft depressurization has a pressurized oxygen storage and a distribution unit operated responsive to loss of pressurization at high altitude for feeding a pipe with pressurized oxygen from the storage. The passenger masks have a face cover which is formed with an inwardly directed circumferential flexible sealing lip and are each connected to the pipe by a flexible hose having a metering orifice. The distribution unit delivers pressurized oxygen under a pressure which increases up to a first value which is reached when loss of pressurization occurs immediately under a predetermined altitude (about 40,000 ft) and has a second value, of about two times the first value as long as the altitude exceeds the predetermined value. In a modification, the second pressure is delivered for a given period, typically about 3 mn.
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Bertheau Fernand
Silber Gerard
Asher Kimberly L.
Eros G.I.E.
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