Dust collector

Claim 1

A PROCESS FOR DUST COLLECTION WHICH COMPRISES PASSING A DUST LADEN GAS STREAM FROM A REGION OF RELATIVELY HIGH PRESSURE DOWNWARDLY THROUGH A PLURALITY OF FILTER TUBES, PASSING THE DOWNWARDLY DIRECTED GAS STREAM FROM THE INTERIOR OF THE TUBES THROUGH THE TUBE WALLS TO AN EXTERIOR REGION OR RELATIVELY LOW PRESSURE WHILE SIMULTANEOUSLY CAPTURING THE DUST CARRIED BY SAID STREAM ON THE INTERIOR WALLS OF SAID FILTER TUBES AND IN A CHAMBER BENEATH SAID FILTER TUBES, AND CLEANING SOME OF THE FILTER TUBES WHILE CAPTURING DUST WITH THE REMAINDER OF SAID FILTER TUBES WHILE ALL OF SAID TUBES ARE IN COMMUNICATION WITH SAID REGION OF RELATIVELY HIGH PRESSURE, SAID CLEANING STEP INCLUDING PASSING CLEANING GAS FROM A REGION OF RELATIVELY HIGH PRESSURE THROUGH THE EXTERIOR OF SAID FILTER TUBES BEING CLEANED IN A DOWNWARD DIRECTION TOWARD SAID CHAMBER BELOW SAID TUBES BEING CLEANED, RAPIDLY AND REPETITIVELY INTERRUPTING THE PASSING OF SAID CLEANING GAS AND REDUCING THE PRESSURE TO WHICH SAID TUBES BEING CLEANED ARE SUBJECTED SO AS TO CAUSE SAID TUBES BEING CLEANED TO PULSE RAPIDLY INWARDLY AND OUTWARDLY IN A RADIAL DIRECTION, AND FORMING A QUIESCENT REGION BETWEEN THE TUBES BEING CLEANED AND SAID FIRST MENTIONED REGION OF HIGH PRESSURE THEREBY DIVERTING SAID DUST LADEN GAS STREAM TO THE REMAINDER OF SAID FILTER TUBES.