Oil filter for a motor vehicle and filter cartridge for an oil filter

Patent metadata

Field	Value
Publication number	US-11530632-B2
Application number	US-201917414855-A
Country	US
Kind code	B2
Filing date	Nov 5, 2019
Priority date	Dec 17, 2018
Publication date	Dec 20, 2022
Grant date	Dec 20, 2022

Abstract

An oil filter for a motor vehicle includes a filter cartridge disposed in an oil filter housing. A piston of the filter cartridge is displaceable in the oil filter housing in an axial direction of the filter cartridge. The filter cartridge has a closure element where the closure element is held at an end of at least one strut of the filter cartridge and where a free end of the at least one strut is supported in the oil filter housing. The piston is displaceable relative to the at least one strut in the axial direction of the filter cartridge.

First claim

The invention claimed is:

1. An oil filter ( 10 ) for a motor vehicle, comprising:
an oil filter housing ( 14 ), wherein the oil filter housing ( 14 ) has a main body ( 16 ) and a cover element ( 18 ); and
a filter cartridge ( 12 ) disposed in the oil filter housing ( 14 ), wherein a piston ( 36 ) of the filter cartridge ( 12 ) has a channel ( 20 ) for filtered oil and an outlet port ( 28 ), wherein the channel ( 20 ) is surrounded in a radial direction at least in some regions by a filter material ( 22 ) of the filter cartridge ( 12 ), and wherein the filter material ( 22 ) is disposed between a first end plate ( 30 ) and a second end plate ( 40 ) of the piston ( 36 );
wherein the piston ( 36 ) is displaceable in the oil filter housing ( 14 ) in an axial direction ( 38 ) of the filter cartridge ( 12 ) in order to prevent, in a closed position of the piston ( 36 ), an entry of filtered oil into a channel ( 34 ) provided in the oil filter housing ( 14 ) via a passage opening ( 32 ) formed in the outlet port ( 28 ), and, in an open position of the piston ( 36 ) in which the piston ( 36 ) is distanced further from the cover element ( 18 ) than in the closed position, to allow entry of oil into the channel ( 34 ) provided in the oil filter housing ( 14 );
wherein the filter cartridge ( 12 ) has an annular closure element ( 54 ) via which an annular drain channel ( 56 ), which is configured to drain oil from a receiving region ( 58 ) of the oil filter housing ( 14 ) in which the filter cartridge ( 12 ) is disposed, is closable;
wherein the annular closure element ( 54 ) is held at an end of at least one strut ( 64 ) of the filter cartridge ( 12 ), wherein a free end of the at least one strut ( 64 ) is supported in the oil filter housing ( 14 ), and wherein the piston ( 36 ) is displaceable relative to the at least one strut ( 64 ) in the axial direction ( 38 ) of the filter cartridge ( 12 ).

2. The oil filter according to claim 1 , wherein the free end of the at least one strut ( 64 ) is supported in the oil filter housing ( 14 ) on the cover element ( 18 ) of the oil filter housing ( 14 ).

3. A filter cartridge for an oil filter ( 10 ) of a motor vehicle, wherein the filter cartridge can be disposed in an oil filter housing ( 14 ) of the oil filter ( 10 ) and wherein the oil filter housing ( 14 ) has a main body ( 16 ) and a cover element ( 18 ), comprising:
a piston ( 36 ) that has a channel ( 20 ) for filtered oil and an outlet port ( 28 ), wherein the channel ( 20 ) is surrounded in a radial direction at least in some regions by a filter material ( 22 ) of the filter cartridge ( 12 ) and wherein the filter material ( 22 ) is disposed between a first end plate ( 30 ) and a second end plate ( 40 ) of the piston ( 36 );
wherein the piston ( 36 ) is displaceable in the oil filter housing ( 14 ) in an axial direction ( 38 ) of the filter cartridge ( 12 ); and
an annular closure element ( 54 ) via which an annular drain channel ( 56 ), which is configured to drain oil from a receiving region ( 58 ) of the oil filter housing ( 14 ) provided for receiving the filter cartridge ( 12 ), is closable;
wherein the annular closure element ( 54 ) is held at an end of at least one strut ( 64 ) of the filter cartridge ( 12 ), wherein a free end of the at least one strut ( 64 ) can be supported in the oil filter housing ( 14 ), and wherein the piston ( 36 ) is displaceable relative to the at least one strut ( 64 ) in the axial direction ( 38 ) of the filter cartridge ( 12 ).

4. The filter cartridge according to claim 3 , wherein the free end of the at least one strut ( 64 ) can be supported on the cover element ( 18 ) of the oil filter housing ( 14 ).

5. The filter cartridge according to claim 3 , wherein the at least one strut ( 64 ) is formed as a guide element for guiding the piston ( 36 ) during displacement of the piston ( 36 ) relative to the at least one strut ( 64 ).

6. The filter cartridge according to claim 3 , wherein in at least one of the first and second end plates ( 30 , 40 ), a passage opening is formed through which the at least one strut ( 64 ) passes.

7. The filter cartridge according to claim 6 , wherein the passage opening is formed in a tab ( 70 , 72 ) which projects in the radial direction beyond an edge of the respective at least one end plate ( 30 , 40 ).

8. The filter cartridge according to claim 3 , wherein the at least one strut ( 64 ) has guide regions ( 76 , 78 ) along which the first and second end plates ( 30 , 40 ) can be respectively guided during displacement of the piston ( 36 ) and wherein the guide regions are oriented parallel to the axial direction ( 38 ) of the filter cartridge ( 12 ).

9. The filter cartridge according to claim 3 , wherein the at least one strut ( 64 ) has, between a first guide region ( 76 ) formed in a region of the first end plate ( 30 ) and a second guide region ( 78 ) formed in a region of the second end plate ( 40 ), a length region ( 80 ) in which the at least one strut ( 64 ) is arc-shaped.

10. The filter cartridge according to claim 9 , wherein the at least one strut ( 64 ) in the length region ( 80 ) is curved outwardly in the radial direction.

11. The filter cartridge according to claim 3 , wherein the at least one strut ( 64 ) has at least one spring region ( 82 ) in which the at least one strut ( 64 ) is compressible as a result of a force acting in the axial direction of the filter cartridge ( 12 ).

12. The filter cartridge according to claim 11 , wherein the at least one strut ( 64 ) has at least two legs ( 84 , 86 ) forming a V-shape in the at least one spring region ( 82 ) and wherein spaced-apart respective ends of the at least two legs ( 84 , 86 ) are movable towards one another as a result of the force.

13. The filter cartridge according to claim 11 , wherein the at least one spring region ( 82 ) is formed in a portion of the at least one strut ( 64 ) in which the at least one strut ( 64 ) protrudes beyond an end plate ( 30 ) of the first and second end plates ( 30 , 40 ) which is closer to the closure element ( 54 ).

14. The filter cartridge according to claim 3 , wherein an end plate ( 30 ) of the first and second end plates ( 30 , 40 ) closer to the closure element ( 54 ), surrounding the outlet port ( 28 ) of the channel ( 20 ) of the filter cartridge ( 12 ), has a recess ( 88 ), wherein an inner wall of the recess ( 88 ) is formed by the outlet port ( 28 ), and wherein a filter material region ( 90 ) of the filter material ( 22 ) overlaps with an outer wall ( 92 ) of the recess ( 88 ) in the axial direction ( 38 ) of the filter cartridge ( 12 ).

15. The filter cartridge according to claim 3 , wherein the at least one strut ( 64 ) has, in an end region ( 66 ), at least one stop element which engages behind an end plate ( 40 ) of the first and second end plates ( 30 , 40 ) which is further away from the closure element ( 54 ).

16. The filter cartridge according to claim 3 , wherein the filter cartridge ( 12 ) has a plurality of struts ( 64 ) spaced apart from one another in a circumferential direction of the first and second end plates ( 30 , 40 ) and/or wherein the at least one strut ( 64 ) has a rectangular shape in cross section at least in regions.

Assignees

• Daimler Ag
• Mercedes Benz Group Ag

Inventors

• Sander Markus
• Le Clech Lionel
• Schumacher Eric

Classifications

• F16N2039/065

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