Patent ID: 7917990

Claim:
A duct cleaning apparatus comprising: a. a sealed container having a volume for collecting debris from said duct, wherein said container is adapted to contain a negative pressure; b. means for creating said negative pressure within said sealed container comprising a blower driven by motor means, wherein said blower has an intake and an exhaust, and wherein said intake is in communication with said sealed container volume so that air is drawn from the sealed container thereby creating the negative pressure within the volume; wherein said negative pressure is in communication with a first flexible hose adapted for suction, and wherein said first flexible hose has a first end in communication with said volume by a first attachment means and a second end having a vacuum zone and adapted for mobile placement within the duct, so that debris from the duct enters said vacuum zone and is sucked by the negative pressure into the first flexible hose second end and transported to the sealed container; c. means for creating a positive pressure in a second flexible hose having a first end and a second end, said means comprising said exhaust connected to said first end of said second flexible hose by second attachment means, wherein said first end of the second flexible hose is in communication with the means for creating said positive pressure by second attachment means, and wherein said second end of the second flexible hose is adapted for directing air radially into the duct so that it impinges within the vacuum zone; d. a first nozzle fixed to the second end of the second flexible hose; and, e. a second nozzle fixed to the second end of the first flexible hose, wherein the first flexible hose and the second flexible hose have an equal length and are attached parallel to each other by elastic attachment means.