Filter element

Patent metadata

Field	Value
Publication number	US-10010818-B2
Application number	US-201615218037-A
Country	US
Kind code	B2
Filing date	Jul 24, 2016
Priority date	Jan 23, 2014
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

A filter element for filtering a fluid is provided with a housing and a filter body arranged in the housing. A cover closes off one end of the housing. An inlet is arranged on the cover at a raw side of the filter element for inflow of a fluid into the filter element. An outlet is arranged on the cover at a clean side of the filter element for discharge of the fluid from the filter element. The cover has a connecting area connecting the filter element with a counter element of a filter system. The cover has a sealing area that seals between the filter element and a receptacle of the filter system. A seal is disposed in the sealing area and has two separate sealing surfaces that effect a sealing action in the connecting area in axial direction and in radial direction of the filter element.

First claim

What is claimed is:

1. A filter element for filtering a fluid, the filter element comprising:
a housing;
a filter body arranged in an interior of the housing;
a cover closing off the interior at one end of the housing;

the cover having:
an outlet opening arranged centrally on the cover ( 16 ) and extending through the cover ( 16 ) at a clean side of the filter element for discharge of the fluid from the filter element;
an annular connecting projection ( 17 ) of the cover ( 16 ), formed unitarily in one piece with the cover and projecting axially outwardly on the cover beyond the outlet opening ( 24 ) and the housing, at an axial outer side of the cover, the annular connecting projection ( 17 ) having:
a thread ( 18 ) of the cover ( 16 ) formed into a circumferential wall of annular connecting projection ( 17 ) of the cover ( 16 );
at least one inlet arranged on the cover at a raw side of the filter element for inflow of a fluid into the filter element;
wherein the thread ( 18 ) radially surrounds the outlet opening ( 24 ) and the at least one inlet;
wherein the annular connecting projection ( 17 ) of the cover ( 16 ) is configured to threadably connect the filter element with a counter thread of a receptacle of a filter system;

the cover further comprising
a sealing area ( 27 ) between the filter element and the receptacle of the filter system;

at least one circumferentially extending seal disposed in the sealing area, arranged on a radially exterior wall of the annular connecting projection ( 17 ), for sealing the annular connecting projection,
wherein the at least one circumferentially extending seal ( 28 ) comprises
at least two separate sealing surfaces effecting a sealing action in the connecting area in an axial direction and in a radial direction of the filter element, the at least two sealing surfaces including:
an axial seal surface ( 29 ), sealing axially against the filter element;
a radial sealing surface ( 32 ) spaced away from the axial sealing surface, the radial sealing surface configured to seal the filter element radially against the receptacle.

2. The filter element according to claim 1 , wherein
the at least one circumferentially extending seal comprises an area with a substantially oval cross-section.

3. The filter element according to claim 2 , wherein
the at least one circumferentially extending seal, viewed in the radial direction, is convex on a first side and substantially flat on a second side opposite the first side.

4. The filter element according to claim 2 , wherein
the at least one circumferentially extending seal comprises
a collar ( 28 ) extending in the axial direction, arranged on and circumferentially surrounding the annular connecting projection ( 17 ), the collar fastening the cover onto the housing,
wherein the axial seal surface ( 29 ) seals axially against the collar of the cover,
wherein the collar is arranged adjacent to the area with a substantially oval cross-section.

5. The filter element according to claim 4 , further comprising
a circumferentially extending guide formed by a radial outer wall of the collar,
wherein the at least one circumferentially extending seal is disposed in the circumferentially extending guide and is guided in the axial direction and in the radial direction by the circumferentially extending guide,
wherein the circumferentially extending guide terminates seal-tightly with a collar of the housing.

6. The filter element according to claim 5 , wherein one of the at least two separate sealing surfaces is supported on the circumferentially extending guide.

7. The filter element according to claim 1 , wherein
the cover comprises
a drain closure pin ( 34 ) mounted to the cover and positioned at an outer circumference of the outlet opening ( 24 ) of the cover ( 16 ), the drain closure pin ( 34 ) mounted to freely rotate about an outer circumference of the outlet opening ( 24 ) of the cover ( 16 ), the drain closure pin ( 34 ) configured to drain the fluid from the filter element when removing the filter element from a receptacle of the filter system,
wherein the closure pin ( 34 ) projects axially outwardly away from the cover ( 16 ) through the annular connecting projection ( 17 ),
wherein the closure pin is configured to close a drain in the receptacle ( 102 ).

8. The filter element according to claim 7 , wherein
the annular connecting projection is arranged in the radial direction outside of the drain at the clean side.

9. The filter element according to claim 1 , wherein
the filter element is an annular filter element with a hollow interior;
wherein the annular connecting projection is arranged in the radial direction outside of an inner diameter of the hollow interior of the filter body.

10. The filter element according to claim 1 , configured to filter oil.

11. The filter element according to claim 1 , configured to filter fuel.

12. A filter system comprising:
a receptacle comprising an inlet and an outlet;
a filter element according to claim 1 ,
wherein the filter element with the annular connecting projection is connected exchangeably with the receptacle, the thread of the annular connecting projection ( 17 ) threadably connected to a counter thread ( 104 ) of the receptacle ( 102 );
wherein the inlet of the receptacle is connected with the inlet of the filter element at the raw side;
wherein the outlet of the receptacle is connected with the outlet of the filter element at the clean side.

13. The filter system according to claim 12 , wherein
the receptacle comprises
a sealing surface and
the sealing surface of the receptacle directly contacts and supports the radial sealing surface ( 32 ) of the at least one circumferentially extending seal ( 28 ).

Assignees

• Mann & Hummel Gmbh

Inventors

• Pflueger Frank
• Hasenfratz Robert
• Wagner Fabian
• Roesgen André
• Thalmann Christian

Classifications

• B01D2201/347

  Radial sealings · CPC title

• B01D35/30 Primary

  Filter housing constructions · CPC title

• B01D27/106

  Anti-leakage or anti-return valves · CPC title

• B01D27/08

  Construction of the casing · CPC title

• B01D2201/342

  Axial sealings · CPC title