Surgery – Respiratory method or device – Including body or head supported means covering user's scalp
Patent
1984-11-19
1986-09-30
Kamm, William E.
Surgery
Respiratory method or device
Including body or head supported means covering user's scalp
12820126, 12820523, 12820529, A62B 710
Patent
active
046141863
ABSTRACT:
An emergency breathing device for use in a toxic environment including a clear plastic hood having sealing means about the neck or body to form a generally airtight enclosure about the wearer's head. A canister containing carbon dioxide and water vapor adsorbent material is mounted on a mouthpiece which is located completely within the hood. The mouthpiece directs inhaled air directly into the mouth and directs exhaled air through the adsorbent material before discharging it into the hood interior. An oxygen enriched carbon molecular sieve may be located within the canister whereby oxygen molecules trapped within the sieve are replaced by the carbon dioxide and/or water vapor and are liberated into the hood to enrich the oxygen concentration thereof to extend the breathing time of the wearer. An external hand operated pump may be connected by a hose through an inlet port in the hood to supply small amounts of ambient makeup air into the hood after the air passes through a cartridge mounted on the pump to remove any harmful toxins in the incoming makeup air to extend even further the breathing time of the wearer. A nose sealing device is provided to insure that all inhaled and exhaled air enters and leaves through the mouthpiece and not through the nose of the user.
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patent: 4452240 (1984-06-01), Moretti
Kamm William E.
Molecular Technology Corporation
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