The hydraulic endless screw of Archimedes

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The hydraulic endless screw of Archimedes


It is a mechanism for pumping water with a small difference in height still used today for transporting fluids or granular materials.

It consisted of a wooden shaft which had eight convolutions (curves) of thin and flexible willow or wicker branches (one stuck on top of the other) so that a screw of eight beginnings was created. The screw worked within a wooden pipe. The device was placed in the water with an inclination of 30 degrees. With the manual rotation of the screw, the water (trapped within its coils) rose and flowed from the mouth of the pipe.

SOURCES: "Vitrouvius, On architecture X"