Recirculating positive-pressure respirator

Details Recirculating positive-pressure respirator Recirculating positive-pressure respirator

1990-01-19

1991-09-17

Lewis, Aaron J.

Surgery

Respiratory method or device

Means for removing substance from respiratory gas

12820513, 12820226, A62B 710

Patent

active

050485172

ABSTRACT:
A respirator for recirculating breathing gases, comprises an expiration bag in which an internal tension spring is provided for compressing the bag, and an inspiration bag which can be connected to a respiration gas source. A CO.sub.2 -binding chemical cartridge and an oxygen source is arranged in the respiratory circuit. A space-saving arrangement of the tension spring provided in the breathing bag is also used to generate a positive pressure in the entire respiratory circuit. The positive pressure exercised by the tension springs in the respiratory circuit can be reduced rapidly if necessary, and the operation can be continued under normal pressure. To achieve this, the inspiration bag 11 is provided with an internally disposed pre-tensioning spring 101 serving to compress the inspiration bag.

REFERENCES:
patent: 819704 (1906-05-01), Bamberger et al.
patent: 3815592 (1974-06-01), Staub, Jr.
patent: 4157091 (1979-06-01), Pampuch
patent: 4195627 (1980-04-01), Haertle
patent: 4498470 (1985-02-01), Warncke

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