COMBINED FILTER (VERSIONS) Russian patent published in 2013 - IPC A62B23/02 

FIELD: salvage facilities.

SUBSTANCE: invention relates to breathing organs individual protection facilities (BOIPF) for a human being to protect against harmful substances. The combined filter comprises a body, a bottom with an inlet hole, a three-layer charge, a net for charge fixation, an anti-aerosol filter. The body has an outer threaded neck, where there is an outlet hole. The charge is made in the form of three serially arranged layers from the outer thread of the neck in the volume ratio of 1.0:(0.3-1.0):(1.0-0.3), respectively. The first layer of the charge is an absorber on the basis of the active aluminium oxide impregnated with barium permanganate and/or copper permanganate, and/or zinc permanganate, and/or nickel permanganate. The second layer of the charge is an absorber on the basis of active carbon with oxides and salts of copper and/or zinc, including additives for absorption of ammonia in the form of copper and/or zinc sulfates. The third layer of the charge is an absorber on the basis of active carbon with copper and/or zinc sulfate. The second and third layers of the charge may be arranged in the body mutually instead of one another.

EFFECT: combined filter according to the first and second versions has long-term universal multiple protection against oxides of nitrogen, ammonia, vapours of organic substances, inorganic and acid vapours and gases, aerosols, high protective capacity by chlorine cyanide.

16 cl, 2 dwg