Smoke and pollutant filtering device

Details Smoke and pollutant filtering device Smoke and pollutant filtering device

1981-03-18

1983-05-10

Recla, Henry J.

Surgery

Respiratory method or device

Including body or head supported means covering user's scalp

12820528, 12820529, 55316, 55486, A62B 710

Patent

active

043824404

ABSTRACT:
A smoke and pollutant filtering device comprising a mask having a filter composed of a series of contiguous, serial layers of filtering material. The filter consists of front and rear gas permeable covers, a first filter layer of pressed vegetable matter, a second filter layer comprising a layer of activated charcoal adjacent a layer of aqua filter floss, a third filter comprising a gas permeable cloth situated between layers of pressed vegetable matter, and a fourth filter layer comprising an aqua filter floss. The first through fourth filter layers are sandwiched between the front and rear gas permeable covers. The filtering device is stitched together and mounted within a fire-retardant hood shaped to fit over a human head. Elastic bands are included in the hood to maintain the hood snugly about the head when worn.

REFERENCES:
patent: 533854 (1895-02-01), Loeb
patent: 2341566 (1944-02-01), Monro
patent: 2583304 (1952-01-01), Pipher
patent: 3884227 (1975-05-01), Lutz et al.
patent: 3944403 (1976-03-01), Simpson et al.

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