Filter element and filter system for a liquid medium with ventilation on the post-filtration side and on the pre-filtration side

Patent metadata

Field	Value
Publication number	US-10328369-B2
Application number	US-201715409199-A
Country	US
Kind code	B2
Filing date	Jan 18, 2017
Priority date	Jan 18, 2016
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

A filter element (10) for a liquid medium, in particular fuel, having a first vent channel (60) connected at the intake end to the pre-filtration side (26) of the filter element (10), a second vent channel (66) connected at the intake end to the post-filtration side (28) of the filter element (10); and a vent tube (32) having has at one end an inlet opening (34) and at the other end an outlet opening for fluidic connection of the vent tube (32) to a vent stub of a filter housing, or a vent tube portion for connection to a vent tube of a filter housing.

First claim

What is claimed is:

1. A filter element ( 10 ) for a liquid medium, comprising:
an annular filter medium ( 16 ) arranged on a longitudinal axis ( 18 ) of the filter element ( 10 );
an upper end plate ( 12 ) arranged on an upper axial end of the annular filter medium ( 16 ), the upper end plate ( 12 ) having:
a double walled stub ( 46 ) circumferentially surrounding a central opening ( 54 ) of the upper end plate, the double walled stub ( 46 ) projecting axially outwardly from an exterior side of the upper end plate ( 12 ) of the filter element ( 10 ), the double walled stub ( 46 ) having:
an axially projecting annular outer wall member ( 48 ) encircling the central opening ( 54 ), having a first axial end formed on the upper end plate ( 12 ) and projecting axially outwardly from the exterior side of the upper end plate ( 12 ) to a second end;
an axially projecting annular inner wall member ( 50 ) spaced apart radially inwardly from the annular outer wall member ( 48 ), the annular inner wall member ( 50 ) connected to the second end of the annular outer wall member ( 48 ) and projecting axially inwardly therefrom;
an insert part ( 56 ) arranged against a radially inner side of the inner wall member ( 50 );

wherein the filter element ( 10 ) has:
a pre-filtration side ( 26 ) arranged at radially outer side of the annular filter medium ( 16 ), the pre-filtration side ( 26 ) arranged fluidically upstream of the annular filter medium ( 16 ); and
a post-filtration side ( 28 ) arranged at radially interior side of the annular filter medium ( 16 ), the post-filtration side ( 28 ) arranged fluidically downstream of the filter medium ( 16 );

a venting arrangement ( 30 ) arranged on the upper end plate ( 12 ) and venting both the pre-filtration side and the post-filtration side ( 26 , 28 ) of the filter element ( 10 ) through the upper end plate ( 12 ), the venting arrangement ( 30 ) comprising:
a first axially elongated spiral groove ( 60 ) formed between the radially inner side of the annular inner wall member ( 50 ) and the insert part ( 56 ), forming a first axially elongated spiral venting channel having an intake end fluidically connected to the pre-filtration side ( 26 ) of the filter element ( 10 );
a vent tube ( 32 ) connected to the upper end plate ( 12 ) and extending away from the upper end plate ( 12 ) axially in a direction of towards a lower end plate ( 14 ) of the filter element ( 10 );
wherein the vent tube ( 32 ) has at a first end an inlet opening ( 34 ) and at the other end an outlet opening ( 36 );
wherein the vent tube has formed thereon a cylindrical tube stub ( 40 ) radially surrounding the first end of the vent tube ( 32 ) and received into an annular recess of the double walled stub, between the annular outer wall member ( 48 ) and the annular inner wall member ( 48 );
a second axially elongated spiral groove ( 62 ) formed between the axially projecting annular outer wall member ( 48 ) and the cylindrical tube stub ( 40 ), forming a second axially elongated spiral venting channel ( 66 ) having an intake end fluidically connected to the post-filtration side ( 28 ) of the filter element ( 10 );
wherein the two axially elongated spiral venting channels ( 60 , 66 ) are in each case fluidically connected at a discharge end to the inlet opening ( 34 ) of the vent tube ( 32 ).

2. The filter element according to claim 1 , wherein
the vent tube ( 32 ) is retained on an inlet opening side in a recess ( 44 ) between the outer wall member ( 48 ) and the inner wall member ( 50 ) in the upper end plate ( 12 ),
wherein the outer wall member ( 48 ), the inner wall member ( 50 ) and the upper end plate ( 12 ) are formed in one piece with one another.

3. The filter element according to claim 2 , wherein
the vent tube ( 32 ) is retained in the recess ( 44 ) in the upper end plate ( 12 ) in a radial press fit in which the outer wall member ( 50 ) is presses tightly against an outer side of the cylindrical tube stub ( 40 ).

4. The filter element according to claim 1 , wherein
the first vent channel ( 60 ) is delimited in the radial direction at least in part by the inner wall member ( 50 ) of the upper end plate ( 12 ) and also by an insert part ( 56 ) of the upper end plate ( 12 ).

5. The filter element according to claim 4 , wherein
the first vent channel ( 60 ) comprises a groove, which is open in the radial direction, in the inner wall member ( 50 ) or the insert part ( 56 ) of the upper end plate ( 12 ).

6. The filter element according to claim 4 , wherein
the insert part ( 56 ) extends through a central opening ( 54 ) in the upper end plate in the axial direction into the filter element ( 10 ), which opening is delimited in the radial direction by the inner wall member ( 50 ) of the upper end plate ( 12 ), or in that the insert part ( 56 ) is configured as an H-profiled double sleeve which extends in the axial direction into the recess ( 44 ) in the upper end plate ( 12 ).

7. The filter element according to claim 6 , wherein
the first vent channel ( 60 ) is fluidically connected to the pre-filtration side ( 26 ) of the filter element ( 10 ) via an inlet ( 68 ) arranged in the upper end plate ( 12 ) or in the insert part ( 56 ) of the upper end plate.

8. The filter element according to claim 1 , wherein
the second vent channel ( 66 ) of the filter element ( 10 ) is delimited at least in part in the radial direction by the outer wall member ( 48 ) of the upper end plate ( 12 ) and the vent tube ( 32 ).

9. The filter element according to claim 8 , wherein
the first vent channel ( 66 ) comprises a groove, which is open in the radial direction, in the outer wall member ( 48 ) of the upper end plate ( 12 ) or the vent tube ( 32 ).

10. The filter element according to claim 5 , wherein
the groove ( 62 ) is configured as a spiral groove which extends helically around the longitudinal axis ( 18 ) of the filter element ( 10 ).

11. The filter element according to claim 1 , wherein
the venting arrangement ( 30 ) has a siphon ( 70 ) into which the first and the second vent channels ( 60 , 66 ) open;
wherein the siphon ( 70 ) is delimited in the radial direction internally by an end portion ( 38 ) of the vent tube ( 32 ) and in the radial direction externally by the cylindrical tube stub ( 40 ) which is formed on the vent tube ( 32 ) and engages in the recess ( 44 ) in the upper end plate ( 12 ).

12. The filter element according to claim 11 , wherein
the siphon ( 70 ) is delimited in the axial direction by a connecting portion ( 42 ) formed on the vent tube ( 42 ), the connecting portion ( 42 ) is a radially extending wall connecting the cylindrical tube stub ( 40 ) to the vent tube ( 32 ).

13. A filter system comprising
a filter housing to accommodate a filter element and
the filter element according to claim 1 .

14. The filter system according to claim 13 , wherein
the filter housing has a vent tube which extends in the axial direction into an accommodating space for the filter element and can be connected to the vent tube of the filter element.

Assignees

• Mann & Hummel Gmbh

Inventors

• Weindorf Martin
• Razgani Idriss
• Trautmann Pius
• Nageldinger Bernd

Classifications

• B01D35/30

  Filter housing constructions · CPC title

• B01D35/005 Primary

  Filters specially adapted for use in internal-combustion engine lubrication or fuel systems · CPC title

• B01D2201/4046

  Means for avoiding false mounting of different parts · CPC title

• B01D29/11

  with bag, cage, hose, tube, sleeve or like filtering elements · CPC title

• B01D2201/347

  Radial sealings · CPC title