Patent ID: 7985272
Filing Date: 2011-07-26
Classification: B01D

Abstract:
1. Sifting apparatus, for sifting solid particles from a fluid, comprising: (a) a filter, having a filter wall with an interior surface and an exterior surface, having a principal longitudinal axis between a broader open end and a narrower open fluid inlet end, and having numerous small filter apertures extending through said filter wall from said interior surface of said filter wall to said exterior surface of said filter wall; wherein said filter has a geometric form to cause captured particles to travel along said interior surface towards said open end in response to rotation of said filter; (b) a rotation means, connected to said filter, for rotating said filter in a rotation direction about said axis of said filter; and (c) a fluid impeller means, connected to said filter, for causing said fluid to flow into said fluid inlet end of said filter and to flow out of said filter through said filter apertures; wherein said fluid impeller means comprises a rotating cylindrical fan blade assembly surrounding and coaxial with said filter, connected to and rotating with said filter, said fan blades being slanted in a direction opposite said rotation direction.