Patent ID: 7401971

Claim:
A method for stirring a liquid, comprising: sucking a part of a liquid into a nozzle from a liquid-containing container which opens at the top thereof; and discharging the sucked liquid from the same nozzle directly into liquid remaining in the container at a discharging position above the surface of the liquid remaining in the container and which is horizontally different from a sucking position where the liquid has been sucked to thereby stir the liquid, wherein the sucking and the discharging positions are controlled by automatic control, wherein said sucking and said discharging are conducted plural times, wherein the container has an inclination on the inside wall thereof, said inclination increasing in height toward the outside of the container, and the sucked liquid is discharged toward the inclination, wherein the discharged position is limited to a position which is horizontally external to the sucked position, wherein the liquid is blood.