Oxygen self-rescuer apparatus
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United States of America Patent
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-
Jun 29, 1993
Issued Date -
N/A
app pub date -
Jun 19, 1991
filing date -
Jul 20, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A self-contained portable personal breathing apparatus that has a casing housing a canister containing an oxygen evolving chemical. The casing is disposed inside a cover which is disposed inside a bag. The cover and the casing form a thermal insulating pocket between them, and with the cover material and the casing material, also made of thermally insulating material, a triple layer of thermal insulation is formed around the canister to protect oxygen produced therein from the heat of reaction of the chemical in the canister. A heat exchanger is situated atop the canister to further cool oxygen before inhalation, and breathing tube extends from the bag to the user for channeling exhaled breath and oxygen.
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