PROTECTIVE MASK CANISTER Russian patent published in 2006 - IPC A62B23/02 

FIELD: individual protective means, particularly adapted to protect human respiratory organs against hazardous substances, particularly against carbonic oxide, ammonia, sulfur hydride and benzol.

SUBSTANCE: protective mask canister comprises body with neck provided with outer thread, dust plug, double-layered charge, charge fastening net and bottom provided with neck having inner thread. The charge includes several layers serially arranged in air breathing direction. The outermost layer is formed of hopcalite. The innermost charge layer consists of coal-based adsorbent including copper sulfate. The volumetric layer ratio is 1:(0.8-1.2) and the layers are divided with net partition. Sealing ring is inserted in bottom neck groove.

EFFECT: increased efficiency of protection against carbonic oxide, ammonia, sulfur hydride and benzol, increased protective time, improved charge corrosion resistance, prevention of charge layers mixing, possibility of air-tight aerosol filter connection to protective mask.

1 dwg, 2 tbl