RESCUE RESPIRATORY DEVICE AND METHOD OF RESPIRATORY TRACT PROTECTION BY MEANS OF DEVICE Russian patent published in 1999 - IPC

FIELD: individual protection of respiratory tracts. SUBSTANCE: device has transparent protective mask made of soft fire-proof material with flexible packing around neck hole. Appliance for supplying respiratory mixture under mask may be represented by independent bottle or general main line. Respiratory mixture is fed to submask space by blowing it through submask space with bleeding through soft unsealed neck packing with controllable pressure, as compared with outer pressure beyond mask. EFFECT: simplified construction, enhanced convenience in use and reliability in operation. 3 cl, 2 dwg