METHOD FOR PUMPLESS FLUID PUMPING-OUT Russian patent published in 2014 - IPC F04F3/00 

FIELD: engines and pumps.

SUBSTANCE: invention relates to fluid pumping-out methods using vacuum creation. In the pumpless fluid pumping-out method involving creation of negative pressure in a receiving capacity, connection of the vacuumised capacity to the pumped-out fluid being under action of atmospheric pressure, and filling of the receiving capacity with the pumped-out fluid, negative pressure is created by filling the receiving capacity with steam with simultaneous displacement of air and steam-and-air mixture from it, steaming of the same capacity till complete air displacement and warm-up till saturation temperature of the steam at atmospheric pressure, sealing and cooling of this capacity with simultaneous condensation of the steam remained in it and creation in it of negative pressure, and fixation of the required set temperature of the cooled capacity.

EFFECT: creation of vacuum of such depth that is unachievable for standard rotary and piston pumps; shortening the pumping-out time and excluding consumption of energy or fuel for pump drives.

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