Surgery – Respiratory method or device – Including body or head supported means covering user's scalp
Patent
1988-07-14
1992-01-07
Burr, Edgar S.
Surgery
Respiratory method or device
Including body or head supported means covering user's scalp
12820125, 12820128, A62B 1704
Patent
active
050781308
ABSTRACT:
Protective headgear with a face shield which can be tilted up out of the way, and which when tilted downwardly can be placed in a standby position enabling free breathing of ambient air through a gap between a helmet and the face shield, and can be pressed back to create a seal to require breathing from a controlled source. A selector is mounted on the face shield to enable the wearer to make a quick and effective selection of breathing modes. A face seal can be mounted to the inside of the face shield to form an oro-nasal dam around the nose and mouth of the wearer to provide another seal, and a reduced plenum volume.
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Bonner Stanley A.
Van Oosten Lucien F. A.
Burr Edgar S.
Gentex Corporation
Lewis Aaron J.
Mon Donald D.
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