Gas mask filter canister
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United States of America Patent
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-
Oct 23, 2012
Grant Date -
Jul 5, 2012
app pub date -
Oct 31, 2007
filing date -
Apr 26, 2002
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A filter for a gas mask has a concave outlet wall and a convex inlet wall with a particulate filter bed that has a uniform depth and conforms substantially to the shape of the inlet and outlet wall. The side wall can have an elliptical, circular or convex shape to conform to the curvature of the wearer's face, or a planar shape. The filter an be a double particulate filter element and a double adsorption filter element configured for axial airflow therethrough with a bifurcated flow pattern. The adsorption filter element comprises a granulated charcoal, a composite material having carbon particles combined with binder particles, or an immobilized bed of charcoal granules and EVA-coated fibers.
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