Filter device

• US 10,035,090 B2
• Filed: 04/07/2016
• Issued: 07/31/2018
• Est. Priority Date: 04/21/2015
• Status: Active Grant

• Current Assignee: Mahle International GmbH (MAHLE-STIFTUNG GmbH)
• Original Assignee: Mahle International GmbH (MAHLE-STIFTUNG GmbH)
• Inventors: Kollmann, Andreas, Mert, Stephan, Sutschitsch, Hannes
• Primary Examiner(s): Lithgow, Thomas M
• Application Number:
  US15/568,462
• Publication Number:
  US 20180111072A1
• Time in Patent Office: 845 Days
• Field of Search: None
• CPC Class Codes: B01D 2201/291 End caps
• CPC Class Codes: B01D 2201/305 Snap, latch or clip connecting means
• CPC Class Codes: B01D 2201/306 Closures, lids, caps or filter heads forming one element with the filtering element
• CPC Class Codes: B01D 2201/4007 Use of cam or ramp systems
• CPC Class Codes: B01D 2201/4015 Bayonet connecting means
• CPC Class Codes: B01D 2201/4076 Anti-rotational means
• CPC Class Codes: B01D 2201/4084 Snap or Seeger ring connecting means
• CPC Class Codes: B01D 2201/4092 Threaded sections, e.g. screw
• CPC Class Codes: B01D 27/08 Construction of the casing
• CPC Class Codes: B01D 35/153 Anti-leakage or anti-return valves
• CPC Class Codes: B01D 35/16 Cleaning-out devices , e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
• CPC Class Codes: B01D 35/30 Filter housing constructions
• CPC Class Codes: B01D 35/301 Constructions of two or more housings B01D35/12 takes precedence
• CPC Class Codes: B01D 35/306 Filter mounting adapter
• CPC Class Codes: F02M 37/24 characterised by water separating means
• CPC Class Codes: F02M 37/32 characterised by filters or filter arrangements
• CPC Class Codes: F02M 37/42 Installation or removal of filters

Abstract

A filter device may include a filter housing with a filter housing pot and a cover screwable onto the filter housing pot, and an annular filter element arranged in the filter housing and having an axially protruding pin for closing a run-off channel. The annular filter element may be connected to the cover via a first thread, which may have a dome protruding centrally and axially from an upper end disc of the annular filter element, with an outer thread interrupted by free passages, and hollow cylindrical spring elements, which may protrude axially from the cover and on which an inner thread portion designed to complement the outer thread may be arranged. Each inner thread portion may extend over a longer circumferential portion than one of the free passages. The first thread may be designed running counter to a second thread arranged between the filter housing pot and the cover.

Claims

1. A filter device comprising:

a filter housing with a filter housing pot and a cover screwable onto the filter housing pot; and

an annular filter element arranged in the filter housing, the annular filter element having an axially protruding pin for closing a run-off channel;

wherein the annular filter element is connected to the cover via a first thread;

wherein the first thread has a dome protruding centrally and axially from an upper end disc of the annular filter element, with an outer thread interrupted by free passages, and hollow cylindrical spring elements which protrude axially from the cover and on which an inner thread portion designed to complement the outer thread is arranged;

wherein each inner thread portion extends over a longer circumferential portion than one of the free passages;

wherein the first thread is designed running counter to a second thread arranged between the filter housing pot and the cover.

2. The filter device according to claim 1, wherein a total of eight spring elements are provided with the inner thread portion.

3. The filter device according to claim 1, wherein the outer thread has a total of six free passages.

4. The filter device according to claim 1, wherein the dome and the outer thread with the free passages are formed in one piece with the upper end disc.

5. The filter device according to claim 1, wherein the first thread is formed as a left-hand thread and the second thread as a right-hand thread.

6. The filter device according to claim 1, wherein on a face side of the dome a carrier geometry is arranged, which cooperates with a counter-carrier geometry on a cover side such that the annular filter element on mounting of the cover co-rotates until the pin engages into the run-off channel.

7. The filter device according to claim 1, wherein the filter device is constructed as one of a fuel filter or a lubricant filter.

12. The filter device according to claim 2, wherein the dome and the outer thread with the free passages are formed in one piece with the upper end disc.

13. The filter device according to claim 2, wherein the first thread is formed as a left-hand thread and the second thread as a right-hand thread.

14. The filter device according to claim 2, wherein on a face side of the dome a carrier geometry is arranged, which cooperates with a counter-carrier geometry on a cover side such that the annular filter element on mounting of the cover co-rotates until the pin engages into the run-off channel.

15. The filter device according to claim 2, wherein the filter device is constructed as one of a fuel filter or a lubricant filter.

8. An annular filter element for a filter device, comprising:

an axially and eccentrically protruding pin;

a dome protruding centrally and axially from an upper end disc with an outer thread interrupted by free passages.

9. The annular filter element according to claim 8, wherein the outer thread has at least two free passages.

10. The annular filter element according to claim 8, wherein the dome and the outer thread with the free passages are formed in one piece with the upper end disc.

11. The annular filter element according to claim 9, wherein the outer thread has six free passages.

16. A filter device comprising:

a filter housing with a filter housing pot and a cover screwable onto the filter housing pot; and

an annular filter element arranged in the filter housing, the annular filter element having an axially protruding pin for closing a run-off channel;

wherein the annular filter element is connected to the cover via a first thread;

wherein the first thread has a dome protruding centrally and axially from an upper end disc of the annular filter element, with an outer thread interrupted by free passages, and hollow cylindrical spring elements which protrude axially from the cover and on which an inner thread portion designed to complement the outer thread is arranged;

wherein each inner thread portion extends over a longer circumferential portion than one of the free passages;

wherein the first thread is designed running counter to a second thread arranged between the filter housing pot and the cover;

wherein on a face side of the dome a carrier geometry is arranged, which cooperates with a counter-carrier geometry on a cover side such that the annular filter element on mounting of the cover co-rotates until the pin engages into the run-off channel.

17. The filter device according to claim 16, wherein a total of eight spring elements are provided with the inner thread portion.

18. The filter device according to claim 16, wherein the outer thread has a total of six free passages.

19. The filter device according to claim 16, wherein the dome and the outer thread with the free passages are formed in one piece with the upper end disc.

20. The filter device according to claim 16, wherein the first thread is formed as a left-hand thread and the second thread as a right-hand thread.