Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1992-02-21
1993-03-02
Millin, V.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820127, 12820128, 12820524, A62B 704
Patent
active
051900300
ABSTRACT:
A valve for regulators in self-contained underwater breathing apparatus includes a tubular plug (9) axially slidably accommodated in two sealingly separated adjacent chambers (6,7). Of these two chambers, the so-called pressure chamber (6) is connected with a pressurized gas source, and is provided with a seat (11) for cooperating with the matching edge (109) of the tubular plug (9), and the so-called compensation chamber (7) is formed with a hole or holes (107) connected with the ambient medium, and has the relative end portion of the tubular plug (9), which is in form of a flaring-out expansion head (209) connected with the valve outlet (12), sealingly guided therein. A helical spring (10) is arranged between the expansion head (209) and the opposite partition (8), dividing the two chambers from each other. In order to prevent any heat exchange between the compensation chamber and the plug (9), which is liable to be cooled owing to gas expanding into the expansion head (209), the invention provides a heat insulating member (13) which is placed at least between the helical spring (10) and the expansion head (209).
REFERENCES:
patent: 3898978 (1975-08-01), Marcus
patent: 4356820 (1982-02-01), Trinkwalder, Jr.
patent: 4428392 (1984-01-01), Jones et al.
patent: 5052383 (1991-10-01), Chabert
Chiu Raleigh
Millin V.
Scubapro Europe S.r.l.
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