MASK FOR PROTECTING RESPIRATORY ORGANS FROM COLD Russian patent published in 2001 - IPC

FIELD: facilities for protecting individual's respiratory organs during operation under low temperature working conditions. SUBSTANCE: mask has casing manufactured from low heat conduction material and provided with inhalation and expiration opening, cartridge with heat-exchanger made from high conduction material and communicated with inhalation and expiration opening, and heat-insulating member positioned at heat-exchanger exit end and made in the form of dustproof filter. Mask provides effective heating of inhaled air and catching of coarse-dispersion dust during inhalation of dust-laden air. EFFECT: increased efficiency and simplified construction. 1 dwg