Surface breathing device

Surgery – Respiratory method or device – Face mask covering a breathing passage

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Details

12820524, 12820621, A62B 902

Patent

active

058456376

ABSTRACT:
An ambient air breathing device for use in combination with a full face mask. Full face masks are intended to be sealed around periphery of the face of the wearer and, therefore, require that the wearer breath on tanked air even before such air would be necessary to sustain life. The breathing device of the invention allows the wearer to breathe ambient air thus conserving otherwise supplied air for use when needed.

REFERENCES:
patent: 4226234 (1980-10-01), Gunderson
patent: 4440163 (1984-04-01), Spergel
patent: 4606340 (1986-08-01), Ansite
patent: 5438981 (1995-08-01), Starr et al.

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