ROTARY PIPE AND FIXED CHANNEL AUGER WITH INTERMEDIATE OUTER SUPPORTING ELEMENTS

摘要

A rotary pipe and fixed channel auger with intermediate outer supporting elements comprises alternated portions of a rotary spiral, within the fixed outer channel and, respectively, of a fixed spiral clamped within an outer pipe which turns rigidly therewith, the portions of rotary pipe having preferably a like length and bearing on outer supporting elements which substantially com- prise pairs of centering rollers connected by shafts which are parallel to the axis of the spiral