PISTON PUMP WITH PNEUMATIC DRIVE Russian patent published in 2001 - IPC

FIELD: pneumatic systems for transfer of contaminated viscous and gummy media (for example, contaminated mazut, mazut-containing soil). SUBSTANCE: pneumatic distributor is provided with control pneumatic cylinder and is brought out of pump boundaries. Control pneumatic cylinder has pneumatic lines which are common with drive chambers of pumps. Lines feeding compressed air to control pneumatic cylinder are provided with air flow control units. Working piston of pneumatic distributor is differential; control pneumatic cylinders of pneumatic distributor and hydraulic distributor have common pneumatic lines with drive chambers and pump. EFFECT: enhanced operational reliability and maintainability. 2 cl, 2 dwg