Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1995-05-10
1997-08-12
Asher, Kimberly L.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820426, 13750525, A61M 1600, A62B 704, A62B 902, F16K 3126
Patent
active
056555245
ABSTRACT:
A first-stage air regulator for diving apparatus which is designed to reduce high tank air pressures to air pressures more compatible with normal breathing. The air regulator includes a cylindrical regulator housing containing a sliding piston which is provided with air slots adapted for transiently establishing air flow from a high-pressure air chamber contained in one end of the housing to an intermediate-pressure air chamber adjacent to the high-pressure air chamber. The air within the intermediate-pressure chamber equilibrates with pressure applied to the piston by a spring and ambient water pressure, before passing to a second-stage air regulator and mouthpiece by means of an air hose. Additionally, air can be transferred from the intermediate-pressure chamber to accessories such as a lift bag, a power inflator or a blow gun, through corresponding air hoses.
REFERENCES:
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patent: 3706477 (1972-12-01), Stelzer
patent: 3714941 (1973-02-01), Kipling
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patent: 4723725 (1988-02-01), Comment
patent: 4889115 (1989-12-01), Bozano
patent: 5038770 (1991-08-01), Perkins
patent: 5052383 (1991-10-01), Chabert
patent: 5176169 (1993-01-01), Ferguson
patent: 5190030 (1993-03-01), Semeia
patent: 5213132 (1993-05-01), Comment
Asher Kimberly L.
Harrison John M.
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