RESPIRATORY APPARATUS Russian patent published in 1995 - IPC

FIELD: medical engineering. SUBSTANCE: this respiratory apparatus incorporates piston-type pressure regulator 3 with valve 13, automatic breathing apparatus 5, and minimum air pressure audio warning device 9 disposed in subdiaphragm space C of automatic breathing apparatus 5. Pressure regulator 3 is provided with spring-loaded sleeve 17 which encompasses end fitting 16 of piston 12. Cross-sectional area of piston end fitting is equal to through-flow area of seat in valve 13 and high-pressure space E of pressure regulator 3 communicates with space D of sleeve 17 via passage 20. EFFECT: more sophisticated design. 1 dwg