The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 2012
Filed:
Oct. 31, 2007
David K. Friday, Cockeysville, MD (US);
John Schlaechter, Columbus, OH (US);
Wayne E. Ballantyne, Columbus, OH (US);
Robert J. Puhala, Frederick, MD (US);
David W. Pike, Salisbury, GB;
David K. Friday, Cockeysville, MD (US);
John Schlaechter, Columbus, OH (US);
Wayne E. Ballantyne, Columbus, OH (US);
Robert J. Puhala, Frederick, MD (US);
David W. Pike, Salisbury, GB;
Avon Protection Systems, Inc., Cadillac, MI (US);
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.