Improved surface removing or surface cleaning machine

摘要

In a surface removing or cleaning machine of the kind in which abrasive grit is projected by a blast wheel 5 at high speed against a surface (4), rebounded grit and dirt pass upwardly through a reclaim channel (8A) to a first hopper (9). A current of air (9C) is drawn through the reclaim channel and the first hopper. Grit and dirt fall from the hopper (9) into a drum (16) and are moved axially thereof by an auger (11) to be forced through flap valves (18) to a collecting space (13) whence grit and dirt are lifted by buckets (14) to fall (at 15) into an air wash separator (19). Separated grit falls (at 21A) to a further hopper (24A) for return to the blast wheel (5).