Automatic breathing apparatus for underwater immersion at medium and great depth
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United States of America Patent
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Nov 29, 1994
Grant Date -
N/A
app pub date -
Aug 31, 1992
filing date -
Aug 18, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The disadvantages of operation 'rigidity' found in automatic breathing apparatus according to the prior art are overcome by means of a regulator group made in a number of versions and capable of adjusting, moment by moment, according to the surrounding pressure or depth, the percentage of breathing gases forming the final breathing mixture, which can be made up of various percentages of oxygen and air, or oxygen and helium, or air and a Heliox mixture, or air, oxygen and helium. Mixture of the various basic gases forming the final breathing mixture is controlled by means of modular adjustment and/or control elements which can be combined together in various manners to give the above mentioned operative characteristics.
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