Electrically and mechanically controllable closed cycle respirator
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United States of America Patent
Stats
-
Apr 3, 1984
Grant Date -
N/A
app pub date -
Mar 11, 1982
filing date -
Mar 13, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A closed cycle respirator is disclosed which includes a respiration air cycle having a breathing bag and a carbon dioxide absorber with connecting lines between the breathing bag and absorber and to a junction adapted for use by the user of the equipment. A pressurized oxygen bottle is provided with a controllable valve for supplying oxygen to the cycle in case the oxygen drops below a selected value in the breathing bag. In case of failure of the controllable valve, a separate oxygen supply connection is provided to the breathing cycle with a valve which senses a reduction of pressure in the breathing cycle and opens the connection to the oxygen bottle for emergency supply of oxygen to the cycle.
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