AUTOMATIC SWITCH DEVICE FOR SUPPLYING INHALATION GAS MIXTURE INTO PNEUMATIC SYSTEMS OF PROTECTION MEANS Russian patent published in 2006 - IPC A62B7/02 A62B9/02 

FIELD: medical engineering.

SUBSTANCE: device has body, having cavity divided into compartments by the first and the second check valves. The compartments are connected to the pneumatic systems of individual protection means via external and/or internal inhalation gas mixture reserve sources, respectively. Locking member of the first valve is mounted in device body cavity in at least one radial sealing ring allowing translational displacement and body cavity compartment connection to the pneumatic systems of individual protection means and inhalation gas mixture sources. Locking member of the second check valve is mounted in locking member canal of the first check valve connecting device body compartments connected to the external inhalation gas mixture reserve source and lung automaton of individual protection means, respectively. Locking member of the second check valve is spring-loaded. Sealing surfaces are available on device body compartments and on locking members of the check valves. Locking member of the first check valve is spring-loaded, the springs acting upon corresponding locking members in opposite directions. Device body casing compartment connected to inhalation gas mixture reserve source is manufactured as ring-shaped groove enveloping cavity compartment connected to pulmonary automaton. Internal and external ring-shaped seals are formed on end face surfaces of the groove. The surfaces are of large and small diameter engageable with corresponding surfaces of the locking member of the first check valve.

EFFECT: improved operation characteristics.

4 cl, 2 dwg