Surgery – Respiratory method or device – Means for removing substance from respiratory gas
Patent
1997-07-31
1999-09-28
Weiss, John G.
Surgery
Respiratory method or device
Means for removing substance from respiratory gas
12820125, 12820126, 12820527, 12820611, 12820617, A62B 1810
Patent
active
059571314
ABSTRACT:
A respiratory filtration mask that offers protection from hazardous particulate aerosols, vapors, and the like and which is particularly useful for providing respiratory protection from biological warfare agents. The mask provides a military level of protection against biological agents in a half mask configuration, thereby avoiding the disadvantages of a full face mask such as restricted vision, heat buildup, weight, and feeling of enclosure. The mask has a housing enclosing a filter compartment and a gas transfer compartment and an air inlet which allows unfiltered air into the filter compartment. There is a filter medium in the filter compartment which removes contaminants from the unfiltered air and provides filtered air substantially free of contaminants to the gas transfer compartment. A one way air valve regulates air flow between the filter compartment and the gas transfer compartment. Both a mouthpiece and a nasal insert extend outwardly from the housing and allow for the inhalation of filtered air from the gas transfer compartment and the receipt of exhaled air from the mouth and nose of a user. An air exit valve regulates the removal of exhaled air from the gas transfer compartment.
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Hutchinson Richard W.
Jones Van Roger
Biffoni Ulysses John
Srivastava V.
Stolarun Edward L.
The United States of America as represented by the Secretary of
Weiss John G.
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