FILTERING-ABSORBING BOX FOR SET OF GAS AND SMOKE PROTECTING MEANS Russian patent published in 2003 - IPC

FIELD: individual devices for protecting respiratory organs from hazardous substances. SUBSTANCE: filtering-absorbing box has casing, bottom with filter and separated drying agent-absorbent layers and hopcalite layer, with moisture content of said layers being not in the excess of 1 wt% and volumetric ratio of components being 1: (1.3-1.8), respectively. Drying agent- absorber is charcoal base with calcium chloride additives. Filtering-absorbing box of such construction provides protection from number of hazardous substances for at least 30 min. EFFECT: increased efficiency and simplified construction. 1 dwg, 2 tbl