Archimedes screw pump for water and fish, has helical flange with one end located at point on the screw periphery

摘要

At least one end (17) of the helical flange (15) ends at a point located on the screw periphery. This end of the flange glides smoothly into the water instead of violently striking the water as the screw rotates. The pump (11) comprises a conduit (12) containing a screw formed by at least one helical flange in contact with the inside of the conduit.