Closed-circuit positive pressure breathing apparatus with pneumatically operated storage chamber
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United States of America Patent
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May 29, 1990
Grant Date -
N/A
app pub date -
Oct 5, 1988
filing date -
Oct 5, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There is disclosed a self-contained breathing apparatus of the positive pressure type wherein there is provided a pneumatic servo mechanism responsive to a pressure sensor to drive a breathing storage chamber by expansion of an oxygen containing gas from a storage tank therefor.
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