Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1979-04-13
1981-06-23
Recla, Henry J.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820426, 12820524, 13750525, A62B 700
Patent
active
042744040
ABSTRACT:
An oxygen supply system for human inhalation of oxygen at a constant oxygen flow rate is provided including an oxygen cylinder having a pressure regulator to provide a source of pressure regulated oxygen which is passed through a fluid restrictor nozzle having a metering orifice to provide a constant volume oxygen flow to an oxygen inhalation mask through a first oxygen hose connected to the cylinder and a second mask hose connected to the inhalation mask. An oxygen flow shut-off valve is provided in a normally open position to allow oxygen flow normally from the cylinder through the hoses and through an inhalation valve in the mask to the user. A fluid pressure responsive diaphragm is provided in association with the oxygen flow shut-off valve to shut-off oxygen flow to the mask when oxygen pressure buildup in the mask hose exceeds a predetermined amount, such buildup occurring when user exhalation closes the mask inhalation valve.
REFERENCES:
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patent: 3276462 (1966-10-01), Matchett
patent: 3285261 (1966-11-01), Chaney
patent: 3456642 (1969-07-01), Cupp
patent: 3768466 (1973-10-01), Johnson
patent: 3875957 (1975-04-01), Veit et al.
Cleary James D.
Molzan Albert R.
American Safety Flight Systems, Inc.
Recla Henry J.
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