Patent ID: 6279197
Filing Date: 2001-08-28
Classification: B08B,F24F

Abstract:
In a ductwork cleaning system having a central unit providing a source of vacuum and means for rotating a drive shaft, with a flexible vacuum hose for delivering a vacuum to the duct to be cleaned, said flexible vacuum hose having a concentric flexible drive shaft contained therein and a rotating brush disposed at one end of the flexible vacuum hose, the improvement comprising:a) a nozzle unit having a first collar having means for attachment to the one end of the vacuum hose;b) a second collar spaced apart from said first collar for receivably mounting the rotating brush;c) a sleeve for rotatably mounting the flexible drive shaft for the brush, said sleeve being joined to said second collar and extending to said first collar;d) spacers for positioning said first collar apart from said second collar and openings for the vacuum being defined between the first and second collar.