Surgery – Respiratory method or device – Means for removing substance from respiratory gas
Patent
1991-02-19
1991-11-05
Burr, Edgar S.
Surgery
Respiratory method or device
Means for removing substance from respiratory gas
12820612, 12820617, A62B 710
Patent
active
050624210
ABSTRACT:
The novel respiratory mask has a soft, compliant facepiece to which is permanently sealed a relatively thin, rigid insert. The insert has swept back cheek portions, each formed with an aperture at which a filter cartridge is snapped into place through an opening in the facepiece. Adjacent said opening, the facepiece has a rigid which is bent over and stretched outwardly by the cartridge to create a hermetic seal. Each filter cartridge is asymmetric and swept back to shift the center of gravity inwardly toward the wearer's head, thus making the mask seem to be lighter to a wearer than is a conventional respiratory mask of equal weight which has a center of gravity in front of the wearer's head. Fitted over an annular flange around a central aperture of the insert is a harness attachment. Because the insert and harness attachment can be lightweight, the mask can be lighter in weight than are prior masks having filters of equal weight. The novel respiratory mask can be of low cost, thus making it economical to be discarded after each use.
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Burns James A.
Reischel Joseph G.
Burr Edgar S.
Griswold Gary L.
Kirn Walter N.
Lewis Aaron J.
Maki Eloise J.
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