Filter device, in particular liquid filter

Abstract

A filter device includes in a filter housing a hollow cylindrical filter element having frontal end plates. A port having a first sealing element is incorporated into a cover the filter housing, said sealing element being arranged coaxially relative to a second sealing element in a flow opening in the end plate.

What is claimed is: 
     
         1 . A filter system, comprising:
 An exchangeable filter device for filtering as a fluid, comprising:
 a filter housing that is pot shaped; 
 a cover arranged on and closing over an open end of the filter housing; 
 a hollow cylindrical filter element arranged in an interior of the filter housing, the filter element including:
 a filter medium for filtering the fluid; 
 end disks arranged on opposing axial ends of the filter medium; 
 wherein a first end disk of the end disks has a flow opening extending through the first end disk into an interior of the hollow cylindrical filter element; 
 
 wherein the cover has a flow opening aligned axially with the flow opening of the first end disk; 
 a dual channel connector receiver for engaging a dual channel pipe member, to supply fluid to and for conveying fluid away from the filter device, the dual channel connector receiver comprising:
 an annular cylindrical projection formed on the cover at an outer circumference of the flow opening of the cover and surrounding the flow opening of the cover, the annular cylindrical projection projecting axially outwardly away from the cover; 
 a first annular seal element arranged on a radially outer side of the annular cylindrical projection; 
 a second annular sealing element arranged on the first end disk, and circumferentially surrounding the flow opening of the first end disk; 
 
 a dual channel pipe member configured to engage into the dual channel connector receiver, the dual channel pipe member including:
 a tubular discharge connector formed as a tubular discharge pipe enclosing a discharge channel of the dual channel pipe member; 
 a tubular supply connector formed an annular tubular member circumferentially surrounding the tubular discharge pipe and arranged concentrically to the tubular discharge pipe, the tubular supply connector formed in one piece with the tubular discharge connector, an annular gap between the tubular discharge pipe and the tubular supply connector forming an annular supply channel of the dual channel pipe member; 
 wherein the tubular supply connector seals to the annular cylindrical projection of the cover by the first annular seal element; 
 wherein the tubular discharge connector and the tubular supply connector are arranged coaxially to one another and configured to insert into the dual channel connector, the tubular discharge connector is received through the flow opening of the first end disk and sealed to the first end disk by the second annular sealing element. 
 
   
     
     
         2 . The filter system according to  claim 1 , wherein
 the first end disk includes an annular centering element projecting axially outwardly from the first end disk and surrounding the flow opening of the first end disk.   
     
     
         3 . The filter system according to  claim 1 , wherein
 the annular cylindrical projection projects axially outwardly from the cover to an axial outer end arranged outwardly beyond the filter housing and the cover.   
     
     
         4 . The filter system according to  claim 3 , wherein
 the axial outer end of the annular cylindrical projection is bent radially inwardly, forming a radially inward projecting flange projecting into an interior of the annular cylindrical projection.   
     
     
         5 . The filter system according to  claim 3 , further comprising:
 a radially outward extending collar arranged on the axially outer end of the annular projection, the radially outward extending collar projecting radially outwardly away from the axially outer end if the annular projection.   
     
     
         6 . The filter system according to  claim 2 , wherein
 the axial outer end of the annular cylindrical projection is bent radially inwardly, forming a radially inward projecting flange projecting into an interior of the annular cylindrical projection;   wherein the annular centering element of the first end disk projects into the interior of the annular cylindrical projection of the cover, an axially outer end of the annular centering element spaced away from the radially inward projecting flange, the spacing forming an annular sealing pocket arranged between and axially delimited by the radially inward projecting flange and the annular centering element.   
     
     
         7 . The filter system according to  claim 6 , wherein
 the first annular sealing element is held in the annular sealing pocket by contacting against the radially inward projecting flange and the axially outer end of the annular centering element.   
     
     
         8 . The filter system according to  claim 1 , wherein
 the dual channel pipe member further comprises either:
 at least one non-return valve integrated into the dual channel pipe member, or 
 a pressure control valve integrated into a return channel. 
   
     
     
         9 . The filter system according to  claim 1 , wherein
 the first and second annular sealing elements are arranged axially offset to one another and axially spaced away from one another.   
     
     
         10 . The filter system according to  claim 1 , wherein
 the flow opening in the first end disk forms a filtered side connector for conveying fluid away from the filter device.   
     
     
         11 . The filter system according to  claim 5 , wherein
 the radially outward extending collar forms an axial stop engaging the dual channel pipe member onto the dual channel connector receiver of the cover.   
     
     
         12 . The filter system according to  claim 1 , wherein
 the tubular supply connector has a connecting segment forming an annular wall surrounding an outer wall of the tubular supply connector, the connecting segment having a positive fit pocket to receiving and engaging a latch of the dual channel connector receiver.