ISOLATING RESPIRATORY APPARATUS Russian patent published in 1996 - IPC

FIELD: individual human respiratory organ protective means, may be used in mining, chemical and other branches of industry. SUBSTANCE: isolating respiratory apparatus has regenerative cartridge, breathing sack 8, excessive valve 19 with spring-loaded stem, valve box 10, heat-exchanger, face part with nose clip, corrugated pipes 9,11. Valve box 10 has branch pipes arranged to form rectangular cross and adapted to receive breathing valve 17 and breathing out valve 16. Face part is connected to upper branch pipe by corrugated pipe 11. Opposite branch part with breathing out valve 16 is connected by corrugated pipe 9 with breathing out branch pipe 7 of cartridge. Side branch pipe with breathing valve 17 is connected with breathing sack 8 connected with cartridge. Panel of sack 8 is connected through flexible tie-rod 20 with spring-biased stem of excessive valve 19. Tie-rod 20 is inserted through hollow pin 21 carrying breathing valve 17. EFFECT: increased efficiency in protecting against hazardous substance, wider operational capabilities and enhanced reliability in operation. 2 cl, 4 dwg