DEVICE FOR ASPIRATION AND DRAINING INTERNAL CAVITIES OF PATIENT IN PRESSURE CHAMBER Russian patent published in 1994 - IPC

FIELD: medical engineering. SUBSTANCE: draining system 1 is disposed in pressure chamber. Draining system has safety valve 4 and vacuum meter 5. Pressure drop regulator 8 is mounted in the chamber. Regulator 8 has case, provided with spring-loaded valve 12, membranes 13 and 14, which have different sizes. The membranes are connected together by pusher 15 and adjust screw 18. There are three cavities in the case: input 9, output 10 and control 11. Input cavity is connected with gas feed line 7, output cavity is connected with injector 6, control cavity is connected to draining system. External side of the larger membrane is turned to the cavity of pressure chamber, valve is turned to external side of the smaller membrane. EFFECT: improved efficiency. 1 dwg