Surgery – Respiratory method or device – Means for removing substance from respiratory gas
Patent
1988-10-21
1990-08-07
Hafer, Robert A.
Surgery
Respiratory method or device
Means for removing substance from respiratory gas
12820615, 12820617, 12820628, A62B 710
Patent
active
049459074
ABSTRACT:
A reusable face mask is disclosed that filters particulate matter and noxious and poisonous gasses from breathed air. The face mask has a mask shell that is thermoformed of cross-linked, closed cell foam sheet that is impermeable to air while having good shape retention and elasticity. The mask shell is perforated with multiple holes in its central area to permit inhaled air to pass through the otherwise impermeable shell. The mask shell is stiff enough to support filter mounting apparatus that has an internal potion and an external portion that both cover the multiple holes. Filters made from filter sheet material and having a self-adhesive strip around their periphery are removably attached to the mounting apparatus to filter breathed air. Neither the mounting apparatus nor the filters ever touch the face of the wearer of the face mask. By using two filters, selective combinations of noxious and poisonous gasses, dusts and mists may be filtered from breathed air.
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Funk Joseph E.
Hafer Robert A.
New England Thermoplastics, Inc.
Rooney Kevin G.
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