What Leonardo da Vinci device used a winged screw to pump water?

Leonardo da Vinci studied and designed versions of Archimedes’ screw for pumping water.

An Archimedes’ screw consists of a helical surface inside a tube or around a cylinder. When the screw rotates, water is carried upward along the spiral. Leonardo investigated the mechanism as part of his broader interest in hydraulic engineering, canals, pumps, and water-lifting machines.

The invention is named after Archimedes, the ancient Greek mathematician traditionally associated with it, rather than after Leonardo. Leonardo’s importance lies in his detailed Renaissance studies and adaptations of hydraulic devices, not in originating the ancient principle.

The device is different from the aerial screw in Leonardo’s flight studies. An Archimedes’ screw moves water through a rotating helix, whereas the aerial-screw concept was intended to interact with air.