Surgery – Respiratory method or device – Means for removing substance from respiratory gas
Patent
1986-10-17
1988-04-26
Coven, Edward M.
Surgery
Respiratory method or device
Means for removing substance from respiratory gas
12820621, 12820624, A62B 700
Patent
active
047397551
ABSTRACT:
The device relates to a mask worn over a wearer's face for air filtration. The mask has an inturned lip that forms a seal on the edge of the mask with the wearer's face. The mask also has at least two other contact surfaces, internal to the edge seal, which vary in length to increase the seal integrity of the mask. The mask has an exhalation valve in the front in direct line of expelled breath and a plurality of horizontal pleats below the exhalation valve such that the wearer can talk without substantial movement of the sealing edge. The mask also has two inhalation valves on each side, over the cheeks, to allow air to enter the mask.
REFERENCES:
patent: 2382364 (1945-08-01), Tant
patent: 2505173 (1950-04-01), Conley
Parker Jay A.
Rodgers, Sr. Kevin D.
White Willard C.
American Cyanamid Company
Coven Edward M.
Hart Gordon L.
Lacyk J. P.
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