Disposable filter respirator with inner molded face flange

Details Disposable filter respirator with inner molded face flange Disposable filter respirator with inner molded face flange

1988-02-04

1989-10-17

Burr, Edgar S.

Surgery

Respiratory method or device

Means for removing substance from respiratory gas

12820624, 12820615, A62B 700

Patent

active

048739723

ABSTRACT:
A filter respirator forming a face mask to be worn upon the face of a user including a support layer of flexible material. The support layer is molded to conform to the contours of the face of the user and forms a flexible support layer for filter material. A separate layer of filter material filters out impurities. An exhalation valve extends through the support layer and the filter layer in a central position. The exhalation valve includes an inside surface surrounding the central position. A molded non-porous flexible inner flange forms a flexible half-mask for sealing to the face of the user. The inner flange is attached to the peripheral edges of at least the support layer and extends inward to the central position. The inner flange includes a central opening with a surrounding portion conforming and adjacent to the inside surface of the exhalation valve. This forms an inhalation valve between the inside surface of the exhalation passage and the surrounding portion of the central opening of the inner flange.

REFERENCES:
patent: 2133699 (1938-10-01), Heidbrink
patent: 3330273 (1967-07-01), Bennett
patent: 3330274 (1967-07-01), Bennett
patent: 4454881 (1984-06-01), Huber et al.
patent: 4630604 (1986-12-01), Montesi

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