Patent ID: 7749292
Filing Date: 2010-07-06
Classification: A47L,B01D,B04C,Y10S

Abstract:
1. A dust collecting apparatus, comprising: a) a cylindrical housing comprising an upstream cyclone having an inlet, an outlet, an upper end, a base, and a side wall, wherein the inlet of the upstream cyclone is provided in the side wall and is in fluid communication with a source of fluid entering the apparatus; b) a plurality of first downstream cyclones each having an inlet and an outlet, the first downstream cyclones being arranged about a longitudinal axis, wherein the inlet of each of the first downstream cyclones is in fluid communication with the outlet of the upstream cyclone to receive a flow of fluid therefrom; and c) a plurality of second downstream cyclones each having an inlet and an outlet, wherein the inlet of each of the second downstream cyclones is in fluid communication with the outlet of one of the first downstream cyclones, and wherein each of the second downstream cyclones is positioned adjacent to the first downstream cyclone with which it is in fluid communication and is in alignment with the longitudinal axis d) a dust collecting chamber within the cylindrical housing in communication with the first and second downstream cyclones, the dust collecting chamber being positioned above the upstream cyclone, wherein the outlet of the upstream cyclone comprises a conduit extending upwardly from the upper end of the upstream cyclone into the dust collecting chamber, the conduit extending above lower cone openings of each of the first and second downstream cyclones, wherein the conduit is covered with a cover having openings which exclude particulates larger than a predetermined size.