Breathing apparatus

Details Breathing apparatus Breathing apparatus

A - Human Necessities

61

M

137/1.5

A61M 16/00 (2006.01) A62B 7/10 (2006.01)

Patent

CA 1305391

Abstract A circulating breathing apparatus for pressurized operation with a source of compressed gas that discharges the respiration gas and with a breathing bag that is under tension in the inhalation phase, this tension being reduced with the help of a controller that recognizes the phase of respiration, so as to assist respiration in the exhalation phase, is to be improved so as to be a simplified, purely pneumatic-mechanical construction. according to the present invention, this has been achieved in that it incorporates a pneumatic control valve (3) that can be switched over between the inhalation phase and the exhalation phase and is controlled directly by the pressure differential between exhalation pressure and the pressure within the breathing bag (6), which during the inhalation phase, connects the source of compressed gas with the breathing bag (6) and during the exhalation phase controls a pneumatic adjuster (4) by interrupting the connection below the compressed-gas pressure head from the source of compressed gas (1) in such a manner that the mechanical pretension on the breathing bag is reduced.

599378

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