Surgery – Respiratory method or device – Face mask covering a breathing passage
Patent
1988-09-09
1990-08-28
Burr, Edgar S.
Surgery
Respiratory method or device
Face mask covering a breathing passage
12820527, A62B 1808
Patent
active
049516647
ABSTRACT:
A mask for filtering dust and other particulates from air to be breathed by a person and a process for making same. The mask includes a compressible strip covered partially by a sealing material around the entire contact path between the mask and the person's face. The compressible strip provides for changes in the configuration of the face, while the impermeable material maintains a seal during all such changes. Another embodiment includes a support for said compressible strip either in the form of a semi-rigid frame member behind said strip or a plurality of inwardly cantilevered bendable finger members.
REFERENCES:
patent: 2765788 (1956-10-01), Raiche
patent: 2931356 (1958-08-01), Schwarz
patent: 3521630 (1970-07-01), Westberg et al.
patent: 3757777 (1973-09-01), Kaufman
patent: 3974829 (1976-08-01), Tate, Jr.
patent: 4454881 (1984-06-01), Huber et al.
patent: 4628927 (1986-12-01), Ward
Exhibit A-Photographs of 3m Mask.
Burr Edgar S.
Filcon Corporation
Harmon James V.
Lewis Aaron J.
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