Breathing apparatus

Details Breathing apparatus Breathing apparatus

1996-07-03

1998-09-29

Lewis, Aaron J.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820426, 12820514, A61M 1600

Patent

active

058134000

ABSTRACT:
Breathing equipment for use under water, or in a non-respiratory atmosphere, and including a breathing mask (1), a mouth-piece or the like, and a respiratory circuit (2) with a volumetrically variable gas accumulator (7). In addition, there is included a metering bottle (26) connected to the respiratory circuit via a valve device (12), which alternatingly connects the bottle to a source (9) of fresh respiratory gas for filling the bottle and to the circuit for emptying the bottle. The valve device (12) is adapted to regulate filling and emptying the bottle (26) in response to the respiratory cycle, such that fresh respiratory gas is supplied to the circuit (2) during each such cycle. The device (12) is suitably implemented so that the amount filling the metering bottle (26) is adjusted in response to respiratory volume.

REFERENCES:
patent: 3827432 (1974-08-01), Lundgren et al.
patent: 4031887 (1977-06-01), Botos et al.
patent: 4108171 (1978-08-01), Nyman et al.
patent: 4141353 (1979-02-01), Dahlback et al.
patent: 5005570 (1991-04-01), Perkins
patent: 5038770 (1991-08-01), Perkins
patent: 5038772 (1991-08-01), Kolbe et al.
patent: 5076267 (1991-12-01), Pasternack

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