Planetary helical device for removing particulate material from a reservoir

摘要

A helical winding 205 is driven both in a movement of rotation on itself and a planetary movement of rotation about a vertical axis 207 so as to entrain the said material towards an exit 213. The said winding comprises a sweeping part 205a and an entrainment part 205b which is located outside the sweeping surface and connected to a motor 208 located outside the zone of the reservoir 201 occupied by the material. <IMAGE>