Patent ID: 9737833
Date: 2017-08-22
CPC Classifications: B01D,Y10S

Claim:
1. A filter cartridge for use in a reusable filter housing and for filtering dirty fluid supplied by a dirty fluid port of a filter base to which the filter cartridge and filter housing are releasably attachable, the filter base including a clean fluid port through which cleaned fluid exits and a return port through which separated water separated from the dirty fluid exits, the filter cartridge comprising: a tube of filter media extending between first and second ends along a longitudinal axis and defining a central cavity; a first end cap portion sealingly attached to the first end of the tube of filter media, the first end cap portion carrying: a dirty fluid inlet defined by a dirty fluid inlet seal arrangement that fluidly seals with and fluidly communicates with the dirty fluid port of the filter base on an upstream side of the tube of filter media; a clean fluid outlet defined by a clean fluid outlet seal arrangement that fluidly seals with and fluidly communicates with the clean fluid port of the filter base on a downstream side of the tube of filter media, the tube of filter media being fluidly interposed between the dirty fluid inlet and the clean fluid outlet such that fluid flow through the clean fluid outlet must pass through the tube of filter media; a return outlet defined by a return outlet seal arrangement that fluidly seals with and fluidly communicates with the return port, flow of separated water through the return outlet bypassing the tube of filter media and flowing operably through the central cavity of the tube of filter media separated from both clean fluid and dirty fluid flows; wherein the dirty fluid inlet is spaced axially from the first end of the filter media along the longitudinal axis and is positioned, at least in part, radially inward from an outer diameter of the tube of filter media, the first end cap portion defining a radially outward directed flow passage directly connected to the dirty fluid inlet such that dirty fluid flows through the radially outward directed passage prior to passing through the central cavity of the tube of filter media, the radially outward directed flow passage extends radially outward relative to the longitudinal axis beyond the outer diameter of the tube of filter media when flowing in the downstream direction from the dirty fluid inlet, the radially outward directed flow passage is spaced axially from the first end of the filter media along the longitudinal axis in a same direction as the dirty fluid inlet is spaced axially from the first end of the filter media.