Patent ID: 6758212
Filing Date: 2004-07-06
Classification: A62B

Abstract:
A personal emergency breathing system comprising:a shaped body formed of an elastic non-porous material having along a first surface thereof a perimetrical seal for sealing about an individual's nose and mouth; a mouthpiece carried by said body and projecting from said first surface thereof terminating in a bite block for gripping by the individual's teeth, said bite block being shaped to draw the body toward the individual's face to maintain the seal about the individual's nose and mouth upon the individual biting down on the bite block; said body having a chamber with an opening through said first surface and in communication with said mouthpiece, said body having a second surface opposite said first surface; an air filter disposed in said chamber for filtering ambient air and having an air inlet for receiving ambient air and an air outlet for passing filtered air into said mouthpiece; a substantially rigid shell about said body and extending substantially between said first and second surfaces thereof; a hood about said first surface for enveloping an individual's head and having an opening for receiving an individual's head and neck; and first and second one-way valves carried by said mouthpiece, said first valve enabling flow of filtered air from said filter air outlet into said mouthpiece and preventing backflow of exhaled air into said filter, said second valve enabling air exhaled into said mouthpiece for flow into said hood and preventing backflow of air from said hood through said second valve to said mouthpiece.