Patent ID: 6153098
Filing Date: 2000-11-28
Classification: B01D

Abstract:
A fluid filter element, comprising:a hollow perforate cylindrical supporting core;a relatively fine filter media of substantial cross section spirally wound about the supporting core with adjacent layers spaced from each other and with the fine filter media accommodating fluid flow for filtering in both a radial and circumferential direction through the cross section and with free access through the cross section to the supporting core;a relatively coarse filter media of substantial cross section disposed in the space between the layers of fine filter media and with the coarse filter media exiting at the supporting core, the coarse filter media accommodating fluid flow for filtering in both a radial and circumferential direction through the cross section and with free access through the cross section to the supporting core; anda central barrier comprising filter media located adjacent to the supporting core at a longitudinal lead edge of at least one of the layers of filter media, the central barrier fitted over the lead edge and having tails extending rearwardly from the lead edge.