TORNADO

DEVICE FOR THE SEPARATION OF DUST FROM AIR WITH A COLLECTING MEANS FOR COLLECTING THE DUST AND AN EXHAUSTING MEANS FOR EXHAUSTING AIR RELATIVELY FREE FROM DUST CAUSED BY GRINDING, BUFFING, CUTTING, SAWING, TURNING OR POLISHING OPERATIONS, CONSISTING OF A UNIT HAVING A BLOWER, A DUST ARRESTER OR FILTER, MEANS SUCH AS A TRAY OR HOPPER FOR COLLECTION AND A MEANS WHEREBY PURE AIR CAN BE EXHAUSTED FROM THE UNIT