Filtering face mask with inhalation/exhalation check valves

Details Filtering face mask with inhalation/exhalation check valves Filtering face mask with inhalation/exhalation check valves

1990-01-16

1991-01-01

Crowder, Clifford D.

Surgery

Respiratory method or device

Face mask covering a breathing passage

12820615, A62B 1802, A62B 1810

Patent

active

049811347

ABSTRACT:
A respirator comprising an assembly of an outer housing member and an inner housing member which sandwich therebetween a filter and valve assembly that functions to allow the use to inspire purified and filtered outside air.

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