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:
Jan. 23, 2001
Filed:
Mar. 23, 1998
Corey M. Grove, Red Lion, PA (US);
Stephen E. Chase, Jarrettsville, MD (US);
William M. Fritch, Jr., Bel Air, MD (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
An advanced chemical-biological mask for protecting a wearer from chemical and biological environmental contaminants. The mask provides improvements for the wearer in the areas of weight/bulk, fit/comfort, optical compatibility, breathing resistance, communication, and protection. The mask includes a facepiece, eye lens, filter means, inlet and outlet valves, and a nosecup all of which may be molded or integrally bonded to the facepiece which also has a face seal adapted to engage a person's face and form seal therewith. The mask also has a suspension flange which is connected to the facepiece adjacent the seal. An elastic suspension system includes a crown portion for suspending the mask on a person's head and pulling the seal downwardly and into contact with the person's face. The separate nosecup has integral channels to direct the flow of incoming gas along a path adjacent the lens to prevent fogging of the lens. The lens is one-piece and is designed to a polynomial curvature having an optimum eye relief of about 25 millimeters. The filter means comprises low profile integral filters having immobilized carbon beds and particulate filter media.