Surgery – Respiratory method or device – Means for removing substance from respiratory gas
Patent
1987-04-13
1989-08-15
Cohan, Alan
Surgery
Respiratory method or device
Means for removing substance from respiratory gas
12820615, 12820617, 12820628, A62B 710
Patent
active
048565083
ABSTRACT:
A face mask is disclosed that can be reusable or disposable, and which filters particulate matter and/or noxious or poisonous gasses from breathed air. The mask has a shell that is formed of polymeric closed cell foam that is impermeable to air while having good shape retention that enables the edge of the mask shell to conform and seal to the face of a wearer around their nose and mouth. The foam mask shell has one or more holes through the central portion thereof and a filter is mounted to cover said hole(s) to thereby filter all inhaled air passing through said holes. A one-way valve is mounted through the wall of the mask shell to exhaust exhaled air.
REFERENCES:
patent: 4549543 (1985-10-01), Moon
patent: 4573463 (1986-03-01), Hall
patent: 4739755 (1988-04-01), White
Cohan Alan
Funk Joseph
New England Thermoplastics, Inc.
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