Recirculating air cleaner

Claim 1

A RECIRCULATING AIR CLEANER THAT IS ADAPTED TO BE LOCATED ABOVE A COOKTOP OF A DOMESTIC RANGE, SAID AIR CLEANER COMPRISING WALLS FORMING A HOLLOW HOUSING HAVING AN AIR INLET PORT, A FIRST FILTER MEDIUM INTERPOSED IN THE INLET PORT, A PLENUM CHAMBER POSITIONED DOWNSTREAN OF THE FIRST FILTER MEDIUM, A SECOND FILTER MEDIUM POSITIONED IN THE PLENUM CHAMBER, A MOTOR-BLOWER UNIT MOUNTED IN THE HOUSING FOR DRAWING AIR FROM THE SAID PLENUM CHAMBER, AND A MAIN AIR EXHAUST PORT CONNECTED WITH THE BLOWER, THERE BEING A THIRD FILTER MEDIUM LOCATED WITHIN SAID MAIN EXHAUST PORT, AND A SECONDARY EXHAUST PORT CONNECTED WITH THE BLOWER AND BEING OF THIN ELONGATED SHAPE, AND DUCT WORK ADJACENT THE MAIN EXHAUST PORT FOR DRAWING OFF SOME OF THE AIR TO THE SECONDARY AIR EXHAUST PORT SO AS TO DISCHARGE AIR IN A DOWNWARD DIRECTION TOWARD THE COOKTOP IN THE MANNER OF AN AIR CURTAIN SO AS TO DIRECT THE AIR BENEATH THE HOUSING TOWARD THE INTAKE PORT.