Patent ID: 6752146
Filing Date: 2004-06-22
Classification: A62B

Abstract:
A civilian anti-terrorist attack gas mask for use by a person as an emergency measure to remove hazardous air pollutants present in air drawn from an ambient atmosphere having an ambient air pressure, and provide the person with suitably breathable air, the gas mask being configured for fitting over the person's head, above the person's neck and adjacent the person's face, the gas mask comprising:a support structure configured for fitting to the person's head; a brim carried by the support structure for projecting outwardly from the person's head upon fitting the support structure to the person's head, the brim having an outside and an inside; a hood carried by the brim and extending from the brim for establishing a chamber having at least a portion contiguous with the person's face, the chamber being bounded by the hood and the inside of the brim; a passage in the brim, the passage extending from the inside of the brim to the outside of the brim so as to communicate with the chamber and with the ambient atmosphere; an adsorption element in the passage for communicating with the chamber and with the ambient atmosphere; and an impeller assembly for drawing air from the ambient atmosphere into the passage and passing the air through the adsorption element and into the chamber to remove hazardous air pollutants from the air drawn into the passage and deliver an essentially continuous supply of fresh breathable air to the chamber while maintaining an air pressure in the chamber raised above the ambient air pressure.