Gas cleaning apparatus

Claim 1

IN A GAS FLOW SYSTEM: FLUID TREATING MEANS PROVIDING A PLURALITY OF PRESSURE DROPS IN SAID SYSTEM: SAID FLUID TREATING MEANS INCLUDING A MECHANICAL FILTER FOR REMOVING FOREIGN MATTER FROM THE GAS, SAID FILTER HAVING AN UPSTREAM SIDE AND A DOWNSTREAM SIDE; A BLOWER IN SAID SYSTEM DOWNSTREAM OF SAID MECHANICAL FILTER FOR MOVING GAS THROUGH THE SYSTEM; SUCTION CLEANING MEANS OPERABLE UPON SAID FILTER AT AN AREA UPSTREAM OF SAID DOWNSTREAM SIDE FOR REMOVING COLLECTED FOREIGN MATTER FROM SAID FILTER; AND MEANS CONNECTING SAID SUCTION CLEANING MEANS TO SAID SYSTEM BETWEEN THE DOWNSTREAM SIDE OF SAID FILTER AND SAID BLOWER WHEREBY SAID BLOWER WILL PROVIDE SUCTION FOR CLEANING SAID FILTER WITHOUT THE PROVISION OF AN EXTERNAL SUCTION MEANS; SAID CONNECTING MEANS INCLUDING MEANS FOR COLLECTING THE MATERIALS REMOVED FROM SAID FILTER, SAID COLLECTING MEANS INCLUDING MEANS DEFINING A COLLECTING AREA, GAS PERMEABLE COLLECTION MEDIA DISPOSED IN SAID COLLECTING AREA IN A POSITION TO REMOVE THE FOREIGN MATTER FROM THE GAS STREAM DRAWN THROUGH THE CONNECTING MEANS BY SAID BLOWER, AND MEANS PROVIDING ACCESS TO SAID COLLECTING AREA WHEREBY SAID COLLECTION MEDIA MAY BE RENEWED WHEN FLL OF SEPARATED FOREIGN MATTER.