AIR-DRIVEN PUMP Russian patent published in 2001 - IPC

FIELD: pressure sources. SUBSTANCE: each pneumatic valve 13, 14 of air-driven pump 1 is furnished with additional pneumatic cylinder 20 whose piston 22 is coupled with stop 23 of pneumatic valves 13, 14. Cylinder of piston 22 is coupled with working member. Rod space 16 of piston 22 is made closed and is in constant communication with pneumatic main line. Piston space 17 communicates with atmosphere. Piston 22 is spring-loaded. Force of spring 19 exceeds force of return spring 21 of stop 23. EFFECT: increased capacity of pump owing to increase in utilization of working space capacity. 2 dwg