Patent ID: 6682651
Filing Date: 2004-01-27
Classification: B01D

Abstract:
A barrel type fish and/or particulate screen-connected to an outlet for confining fish and/or particulate exterior of the fish and/or particulate screen and collecting water to the interior of the screen, the barrel type fish and/or particulate screen comprising in combination:an elongate enclosure having mesh sides defining a closed interior for the collection of water and a mesh exterior for preventing fish and/or particulate penetration into the closed interior with the collected water, the elongate enclosure having mesh sides having an outlet end for discharging water passing through the mesh from the exterior of the elongate enclosure to the interior of the elongate enclosure; a substantially conical withdrawal manifold within the elongate enclosure having mesh sides, the substantially conical withdrawal manifold having a base end and an apex end, the base end connected to the outlet and the substantially conical withdrawal manifold extending substantially the length of the elongate enclosure having mesh sides at the apex end; and, the substantially conical withdrawal manifold having uniformly sized, shaped and arrayed flow apertures, these flow apertures having substantially constant unit area per unit length of the withdrawal conduit to produce a substantially uniform flow velocity across all sections of the substantially conical withdrawal manifold whereby flow velocity through the mesh is maintained substantially uniform at all changes of flow rate through the mesh of the elongate enclosure.