Patent ID: 7681739
Filing Date: 2010-03-23
Classification: B01D

Abstract:
1. A filter device comprising: a filter housing with a filter inlet and a filter outlet at opposite ends thereof and with an inside filter space; and a conical filter element subdividing said filter space into first and second subspaces arranged sequentially from said filter inlet to said filter outlet, said first subspace tapering conically in transverse cross-section from said filter inlet to said filter outlet, said second subspace widening conically in transverse cross-section from said filter inlet to said filter outlet to provide a uniform flow rate in said first and second subspaces, said subspaces having respective conicities proceeding constantly in opposite directions, tapering of said first subspace and widening of said second subspace occurring to substantially equal extents in that said first subspace extends outwardly and the second subspace extends toward a center of said filter housing with each subspace being bounded opposite said filter element by a cylindrical wall, said filter element narrowing conically from said filter outlet toward said filter inlet.