ISOLATING RESPIRATORY APPARATUS Russian patent published in 2007 - IPC A62B7/08 

FIELD: respiratory apparatus containing chemically bounded oxygen.

SUBSTANCE: respiratory apparatus comprises face part, inhalation and exhalation pipes, inhalation and exhalation valves, regenerative cartridge with inhalation and exhalation connection pipes, inhalation vessel with exhalation vessel arranged in it, excessive pressure valve installed in the exhalation vessel and provided with tension member. Exhalation and inhalation valves are is crossed relationship with respect to corresponding connection pipes of regenerative charge. Tension member is connected to inhalation vessel wall through orifice made in exhalation vessel. Exhalation and inhalation vessels have equal volumes. Ratio between exhalation vessel surface area and that of inhalation vessel is not less than 80%.

EFFECT: reduced temperature of breathing mix to be inhaled and decreased resistance to breathing, increased operational reliability due to guaranteed exhalation and inhalation vessel filling as excessive pressure valve actuates.

2 dwg