This is called the Archimide's screw, invented around A THOUSAND YEARS AGO!!! come on people!! Read some books!!!,(reply>), @Your Average Spelunker so it's a modified Archimide's screw!?!? Are we discussing semantics here?? Is that why you're so bent out of shape??,(reply>), @Luis Mendoza i meant the device is literally a reverse Archimedes screw.  You should actually watch the video.  Instead of the screw turning it's the cylinder.   That's the whole point of the video.  And i meant your name, i recognize that<br><br>And no, I'm not a troll.  Just because you're wrong that doesn't mean I'm a troll,(reply>), @Your Average Spelunker are you mad because I know the device?? Or the name Arquímides?? Or you're just a troll..,...,(reply>), Shut up, it's a reverse archimide's screw<br><br>Also i recognize that name.  How old are you?