Surgery – Respiratory method or device – Including body or head supported means covering user's scalp
Patent
1989-02-06
1990-02-20
Burr, Edgar S.
Surgery
Respiratory method or device
Including body or head supported means covering user's scalp
12820128, 12820712, 12820624, 128DIG15, A62B 710
Patent
active
049017160
ABSTRACT:
There is described a portable and mobile clean room helmet system including a helmet having a removable face shield connected to a battery-powered filtering system for pulling air from within the helmet and exhausting filtered air to the outside environment. The removable face shield contains a plurality of unique flapper valves that allow air to enter the helmet system while at the same time preventing unfiltered air from leaving the system.
REFERENCES:
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patent: 3529594 (1970-09-01), Charnley
patent: 3668705 (1972-06-01), Garbisch
patent: 3955570 (1976-05-01), Hutter, III
patent: 4019508 (1977-04-01), Der Estephaniaa et al.
patent: 4055173 (1977-10-01), Knab
patent: 4296746 (1981-10-01), Mason, Jr. et al.
patent: 4440163 (1984-04-01), Spergel
Stackhouse Wyman H.
Williamson Ian M.
Burr Edgar S.
Lewis Aaron J.
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