Filter for Filtering Liquids and Filter Element of such a Filter

Abstract

A filter for filtering liquids has a housing with an inlet for liquid to be filtered and an outlet for filtered liquid. A coaxial filter element with a filter medium having an interior is arranged in the housing such that the filter element separates the inlet from the outlet. A central tube is fastened to the housing and the filter element is arranged coaxially on the central tube. An inner support body is arranged in the interior of the filter medium in a radial direction of the filter element between a radial inner circumferential side of the filter medium and the central tube. The inner support body has support webs distributed in an axial direction and in a circumferential direction of the inner support body. The support webs support the filter medium at least radially on the central tube.

What is claimed is: 
     
         1 . A filter for filtering liquids, the filter comprising:
 a housing comprising at least one inlet for liquid to be filtered and at least one outlet for filtered liquid;   a coaxial filter element comprising a filter medium comprising an interior, the filter element arranged in the housing such that the filter element separates the at least one inlet from the at least one outlet;   a central tube fastened to the housing, wherein the filter element is mounted coaxially on the central tube;   an inner support body arranged in the interior of the filter medium in a radial direction of the filter element between a radial inner circumferential side of the filter medium and the central tube, wherein the inner support body comprises support webs distributed in an axial direction and in a circumferential direction of the inner support body, wherein the support webs support the filter medium at least radially on the central tube.   
     
     
         2 . The filter according to  claim 1 , wherein at least one of the support webs extends in the axial direction. 
     
     
         3 . The filter according to  claim 1 , further comprising a media support body arranged in the radial direction of the filter element between the inner support body and the radial inner circumferential side of the filter medium, wherein the radial inner circumferential side of the filter medium is supported directly or indirectly on a radial outer side of the media support body and the support webs are supported on a radial inner side of the media support body. 
     
     
         4 . The filter according to  claim 3 , wherein the media support body comprises a support pipe with stays arranged to form a grid, wherein the stays are arranged such that the stays are supported on the support webs of the inner support body. 
     
     
         5 . The filter according to  claim 4 , wherein the stays include axial stays. 
     
     
         6 . The filter according to  claim 4 , wherein the stays include circumferentially extending stays. 
     
     
         7 . The filter according to  claim 4 , further comprising a coalescing medium arranged in the radial direction of the filter element between the media support body and the filter medium. 
     
     
         8 . The filter according to  claim 1 , wherein the inner support body comprises a separating medium configured to separate water from fuel, wherein the separating medium is arranged between the support webs. 
     
     
         9 . The filter according to  claim 8 , wherein the separating medium is a screen. 
     
     
         10 . The filter according to  claim 8 , wherein the separating medium in the radial direction of the filter element has an inner side and an outer side and the support webs are arranged on the inner side and on the outer side of the separating medium. 
     
     
         11 . The filter according to  claim 1 , further comprising a coalescing medium arranged in the radial direction of the filter element between the inner support body and the filter medium. 
     
     
         12 . The filter according to  claim 1 , wherein the filter medium is folded in a zigzag shape. 
     
     
         13 . The filter according to  claim 1 , wherein the housing is configured to be opened and wherein the filter element is exchangeably arranged in the housing. 
     
     
         14 . A filter element of a filter having a housing with at least one inlet for liquid to be filtered and at least one outlet for filtered liquid, wherein
 the filter element is configured to be arranged in the housing such that the filter element separates the at least one inlet from the at least one outlet, the filter element comprising:
 a coaxial filter medium; 
 an inner support body coaxially arranged in an interior of the filter medium and supporting the filter medium; 
 the inner support body configured such that the filter element can be mounted coaxially on a central tube fastened to the housing; 
 wherein the inner support body comprises support webs distributed in an axial direction and in a circumferential direction of the inner support body and configured to support the filter medium at least radially on the central tube in a radial direction of the filter element.