PUMP Russian patent published in 2001 - IPC

FIELD: pump manufacture, particularly pumps with non-uniform working cycle. SUBSTANCE: pump includes two working chambers 1, each having inlet 2 and outlet 3 valves whose working cycles correspond to mutually opposite phases. Regulation membranes 12 are mounted on chambers 1 by means of flanges 13 supporting membranes and having branch pipes 14 joining membrane surface with pumping pipeline 5 connected with valves 3. When pump operates at zero liquid consumption, between flanges 13 and membranes 12 periodically occur spherical segments 17 of compressed liquid in volume corresponding to working volume of chamber 1; it prevents liquid charging to said chambers. At liquid discharging volume of segment 17 reduces providing vacuuming of chambers 1 and liquid charging to it. When membrane 12 is rested upon flange 13 after depletion of segment volume in chamber 1, outlet valve 3 opens providing discharge of liquid from that chamber. Periodically created segments 17 serve as phase accumulators of compressed liquid suppressing pulsations of liquid in pumping pipeline 5. EFFECT: simplified design, reduced size of pump. 1 dwg