Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1992-08-31
1994-11-29
Burr, Edgar S.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820422, 12820426, 12820511, 12820517, 12820524, 12820528, A62B 902
Patent
active
053680200
ABSTRACT:
The disadvantages of operation "rigidity" found in automatic breathing apparatus according to the prior art are overcome by means of a regulator group made in a number of versions and capable of adjusting, moment by moment, according to the surrounding pressure or depth, the percentage of breathing gases forming the final breathing mixture, which can be made up of various percentages of oxygen and air, or oxygen and helium, or air and a Heliox mixture, or air, oxygen and helium.
Mixture of the various basic gases forming the final breathing mixture is controlled by means of modular adjustment and/or control elements which can be combined together in various manners to give the above mentioned operative characteristics.
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patent: 3827432 (1974-08-01), Lundgren
patent: 4450837 (1984-05-01), Ream
patent: 4648397 (1987-03-01), Beale
patent: 4823788 (1989-04-01), Smith et al.
patent: 4964404 (1990-10-01), Stone
patent: 5097860 (1992-03-01), Ferguson et al.
Burr Edgar S.
Raciti Eric P.
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