Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1997-09-17
2000-01-25
Weiss, John G.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820524, 12820311, 12820119, 12820426, A62B 704, A61M 1600
Patent
active
060168021
ABSTRACT:
A breathing apparatus comprises a supply of breathable gas and a facepiece by which breathable gas is supplied to a wearer, the facepiece including a supply valve for delivering gas to the interior of the facepiece, and an exhaust opening closeable by an exhaust valve for allowing the egress of exhaled gas from the facepiece. The exhaust valve comprises a movable valve member which, in a first position, closes the exhaust opening in the facepiece, in a second position is displaced toward the interior of the facepiece relative to the first position while still in sealing engagement with the exhaust opening to open the supply of breathable gas, and in a third position is displaced outwardly of the facepiece relative to the first position to open the exhaust opening to allow the egress of exhaled gas. The valve member is biased towards the second position by a single significant biasing means. A sealing element is preferably interposed between the valve member and the exhaust opening.
REFERENCES:
patent: 3109425 (1963-11-01), Gongoll et al.
patent: 4572176 (1986-02-01), Walther
patent: 4629159 (1986-12-01), Anderson et al.
patent: 4762145 (1988-08-01), Stradella
patent: 4834085 (1989-05-01), Webster, II
patent: 5042473 (1991-08-01), Lewis
patent: 5499624 (1996-03-01), Kruger et al.
patent: 5572990 (1996-11-01), Berlin
patent: 5584288 (1996-12-01), Baldwin
patent: 5749359 (1998-05-01), Hansen
International Safety Instruments, Inc.
Middleton James B.
Rodgers Walter A.
Srivastava V.
Weiss John G.
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