WO2020105060A1 - Ring filter element which can be radially flowed through - Google Patents
Ring filter element which can be radially flowed throughInfo
- Publication number
- WO2020105060A1 WO2020105060A1 PCT/IN2018/050774 IN2018050774W WO2020105060A1 WO 2020105060 A1 WO2020105060 A1 WO 2020105060A1 IN 2018050774 W IN2018050774 W IN 2018050774W WO 2020105060 A1 WO2020105060 A1 WO 2020105060A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- woven
- filter element
- end plate
- ring filter
- manner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D27/00—Cartridge filters of the throw-away type
- B01D27/04—Cartridge filters of the throw-away type with cartridges made of a piece of unitary material, e.g. filter paper
- B01D27/06—Cartridge filters of the throw-away type with cartridges made of a piece of unitary material, e.g. filter paper with corrugated, folded or wound material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D27/00—Cartridge filters of the throw-away type
- B01D27/10—Safety devices, e.g. by-passes
- B01D27/103—Bypass or safety valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/04—Supports for the filtering elements
- B01D2201/0415—Details of supporting structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/29—Filter cartridge constructions
- B01D2201/291—End caps
Definitions
- the present invention relates to a ring filter element which can be radially flowed through having a filter material which is folded in particular in a zigzag manner according to the preamble of Claim 1.
- the invention further relates to a spin-on filter having a metal or plastic housing and such a ring filter element.
- EP 0773 052 A1 discloses a generic ring filter element which can be radially flowed through having a filter material which is in particular folded in a zigzag manner and having end plates which seal the end edges.
- a radial seal comprising a non-woven is further provided.
- either at least one additional non-woven annular plate is applied to a non-woven end plate in an additional welding operation or a non-woven plate which acts as a radial seal is enclosed by means of a plasticized end plate of compact plastic material.
- Ring filter elements for internal combustion engines for example, oil filters, fuel filters, water filters or urea filters, have to be changed after a specific amount of dirt has been absorbed, the so-called dust absorption.
- the present invention therefore relates to the problem of providing for a ring filter element of the generic type an improved or at least an alternative embodiment which in particular enables a longer service-life.
- the present invention is based on the general notion of arranging a non-com- pressed non-woven only in a localized manner on an end plate of a ring niter element so that it is not flowed through but is instead substantially only subjected to flow and thereby acts as an additional dust-absorption element which, as a result of its arrangement and the fact that it does not have to be flowed through and is not compressed, does not influence or only marginally influences a pressure loss in the ring filter element.
- the ring filter element which can be flowed through radially in this instance has a so-called pleated star-like member of a filter material which is in particular folded in a zigzag manner and two end plates which seal the filter material at the end side.
- a non-woven which is exclusively connected in a localized manner to the end plate and which is thereby not compressed.
- not compressed is intended in this instance to mean simply that the non- woven used with the exception of the securing locations is not connected to the end plate and thereby compressed.
- a degree of compression of the non-woven for example, when the ring filter element is installed in an associated filter housing, is thereby not excluded.
- the end plate to which the non-woven is secured in a localised manner is constructed from plastic material.
- plastic material end plates have already been known for a number of years and afford the significant advantage that the end edges of the filter material can be embedded.
- end plates of a compressed non-woven are also conceivable, wherein for the end plate and the non- woven, which is arranged in a localised manner thereon, the same material can be used in this case.
- the non-woven for the end plate is, however, generally compressed, whilst the non-woven which is arranged in a localised manner externally on the end plate is not compressed or compressed only at the securing locations.
- the non-woven is adhesively bonded or welded in a localised manner to the end plate.
- Both securing methods enable reliable connection of the non-woven to the associated end plate and are furthermore both simple in technical production terms and cost-effective.
- a significant advantage is that the localised securing of the non-woven to the end plate can be carried out in an automated manner.
- a resiliency pretensioned bypass valve is advantageously arranged on the end plate.
- a bypass valve which opens in accordance with a fluid pressure which occurs and thereby bypasses the filter material. Even in the event of blocked or clogged filter material, a fluid flow through the ring filter element may thereby still be maintained.
- an inner frame which connects the two end plates.
- This inner frame is used in this instance to support the filter material and may, for example, be constructed from metal or plastic material.
- the inner frame it is conceivable for the inner frame to be constructed in the manner of bellows, with annulariy extending wave peaks and wave troughs. In the region of these wave peaks or wave troughs, through-openings are provided in order to make the inner frame continuous.
- the non-woven is constructed in an annular manner and at least partially, preferably even completely, covers the end plate.
- the present invention is further based on the general notion of providing a spin-on filter having a metal or plastic housing and a ring filter element described above so that the advantages of the ring filter element described in the previous paragraphs can be transferred to the spin-on filter.
- the non-woven is arranged at an unprocessed side. It is thereby already possible to absorb dust before the fluid which is intended to be cleaned passes through the filter material, whereby the service-life thereof can be extended. Additionally or al ternatively, there may also be provision for the non-woven to be arranged on both end plates or only on the end plate which is arranged at the side facing away from an influx opening.
- the single Figure 1 is a sectioned illustration through a spin -on filter according to the invention.
- a spin-on filter 1 has a housing, in particular a plastic material housing ora metal housing 2, and a ring filter element 3 which is arranged therein.
- the ring filter element 3 is in this instance flowed through radially from the outer side to the inner side and has a pleated star-like member of a filter material 4 which is folded in a zigzag manner. End edges 5 of the filter element 4 are in this instance connected to end plates 6 and 7 in a sealing manner.
- a non-woven 8 which is connected to the end plate 6 exclusively in a localised manner, that is to say, at individual securing locations 9.
- the ring filter element 3 may in this instance be constructed as an oil filter, water filter, urea filter or a fuel filter.
- the end plate 6, 7 to which the non-woven 8 is secured in a localised manner may in this instance, for example, be formed from plastic material or also from a non- woven, wherein in this instance the non-woven used for the end plate 6, 7 is compressed and not permeable.
- the non-woven used for the end plate 6, 7 may in this instance be of the same non-woven material as the non-woven 8, wherein the non- woven 8 which is arranged or secured in a localised manner at an outer side of the end plate 6 or 7 is not compressed.
- not compressed is in this instance intended to be understood to mean only that it is not compressed with the exception of the securing locations 9, wherein “not compressed” is not intended to be understood to be a slight compression, for example, as a result of the installation of the ring filter element 3 in the metal or plastic housing 2.
- Filtration properties of the non-woven 8 are only given if the non-woven 8 is not compressed - therefore it is only selectively welded with the end plate 6. This is the important difference to the prior art, in which the entire end plate is welded flat, whereby no more filtration properties are available.
- the non-woven 8 is adhesively bonded or welded to the end plate 6, 7 in a localised manner so that the securing locations 9 may be adhesive locations or welding locations. It is thereby possible to achieve a securing of the non-woven 8 to the associated end plate 6, 7 which is not only simple in technical production terms but also reliable and cost-effective.
- the following materials may be considered a niddle punched non-woven with or without gradient structure made up of nylon or polyester or any synthetic fibre based material.
- Figure 1 it can be seen that there is arranged on the end plate 6 a resiliently pretensioned bypass valve 10 which in the event of a blocked or clogged filter material 4 enables a bypass between the unprocessed side and a clean side of the ring filter element 3 and which ensures a fluid throughflow through the spin-on filter 1 according to the invention, even in the event of clogged filter material 4.
- FIG. 1 it can be seen that there is provided an inner frame 11 which connects the two end plates 6, 7 to each other and which supports the filter materia) 4 in an inward direction.
- the inner frame 11 may in this instance be constructed from plastic material or from metal. Additionally or alternatively, a specific shape of the inner frame 11 may also be provided so that it is constructed in this instance in the manner of bellows, with annulariy extending wave peaks 12 and wave troughs 13. It is thereby possible to achieve further reinforcement of the inner frame 11.
- the inner frame 11 has through-openings 14 through which the fluid which has passed through and been cleaned by the filter material 4 can again flow out into an inner space of the ring filter element and from there out of the spin-on filter 1 via a discharge opening 15.
- the non-woven 8 is considered further, it can be seen that it is constructed in an annular manner and covers the end plate 6 at least partially, in this instance even almost completely.
- the size of the non-woven 8 and in particular also the axial thickness thereof may in this instance be selected in accordance with requirements.
- a significant dust absorption or dirt absorption increase of up to approximately 10% or more depending on thickness of non-woven and space available at the bottom or top end plate or kept below the bottom spring) can still be achieved without the pressure loss as a result of a flow resistance being significantly influenced thereby.
- the non-woven 8 is in this instance arranged at the unprocessed side and is according to Figure 1 secured in a localised manner to the lower end plate 6 which is arranged at a side of the ring filter element 3 facing away from the influx openings 16.
- a non-woven 8 it is also conceivable in this instance for such a non-woven 8 to be secured or arranged in a localised manner at the upper end plate 7, whereby the dust absorption could be increased again.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention relates to a ring filter element (3) which can be radially flowed through having a filter material (4) which is folded in particular in a zigzag manner and having end plates (6, 7) which seal the end edges (5). It is inventively significant in this instance that at least at one end plate (6,7) at an outer side facing away from the filter material (4) there is arranged a non-woven (8) which is connected only in a localised manner to the end plate (6, 7). A significantly improved dirt absorption action and a longer service-life can thereby be achieved.
Description
RING FILTER ELEMENT WHICH CAN BE RADIALLY FLOWED THROUGH
The present invention relates to a ring filter element which can be radially flowed through having a filter material which is folded in particular in a zigzag manner according to the preamble of Claim 1. The invention further relates to a spin-on filter having a metal or plastic housing and such a ring filter element.
EP 0773 052 A1 discloses a generic ring filter element which can be radially flowed through having a filter material which is in particular folded in a zigzag manner and having end plates which seal the end edges. A radial seal comprising a non-woven is further provided. In order to improve the sealing function of the non-woven, either at least one additional non-woven annular plate is applied to a non-woven end plate in an additional welding operation or a non-woven plate which acts as a radial seal is enclosed by means of a plasticized end plate of compact plastic material.
US 9,914,080 B2 discloses an additional ring filter element.
Ring filter elements for internal combustion engines, for example, oil filters, fuel filters, water filters or urea filters, have to be changed after a specific amount of dirt has been absorbed, the so-called dust absorption. The higher the dust-absorption capacity of the ring filter element is, the longer the service-life thereof is.
The present invention therefore relates to the problem of providing for a ring filter element of the generic type an improved or at least an alternative embodiment which in particular enables a longer service-life.
This object is achieved according to the invention by the subject-matter of independent Claim 1. The dependent claims relate to advantageous embodiments.
The present invention is based on the general notion of arranging a non-com- pressed non-woven only in a localized manner on an end plate of a ring niter element so that it is not flowed through but is instead substantially only subjected to flow and thereby acts as an additional dust-absorption element which, as a result of its arrangement and the fact that it does not have to be flowed through and is not compressed, does not influence or only marginally influences a pressure loss in the ring filter element. The ring filter element which can be flowed through radially in this instance has a so-called pleated star-like member of a filter material which is in particular folded in a zigzag manner and two end plates which seal the filter material at the end side. According to the invention, there is now arranged on at least one of the two end plates on an outer side facing away from the filter material a non-woven which is exclusively connected in a localized manner to the end plate and which is thereby not compressed. As a result of the only localized connection of the non-woven to the end plate, the non-woven has a low flow resistance so that even if the fluid which is intended to be cleaned not only flows against the non- woven but instead flows through it, the pressure loss can be kept marginal. The term "not compressed" is intended in this instance to mean simply that the non- woven used with the exception of the securing locations is not connected to the end plate and thereby compressed. A degree of compression of the non-woven, for example, when the ring filter element is installed in an associated filter housing, is thereby not excluded. As a result of the non-woven which is arranged according to the invention only in a localised manner on an outer side of the end plate, it is consequently possible to substantially increase the dust-absorption capacity and thereby to significantly extend the service-life thereof.
In an advantageous development of the solution according to the invention, the end plate to which the non-woven is secured in a localised manner is constructed from plastic material. Such plastic material end plates have already been known for a number of years and afford the significant advantage that the end edges of the filter material can be embedded. Alternatively, of course, end plates of a compressed non-woven are also conceivable, wherein for the end plate and the non-
woven, which is arranged in a localised manner thereon, the same material can be used in this case. The non-woven for the end plate is, however, generally compressed, whilst the non-woven which is arranged in a localised manner externally on the end plate is not compressed or compressed only at the securing locations.
Advantageously, the non-woven is adhesively bonded or welded in a localised manner to the end plate. Both securing methods enable reliable connection of the non-woven to the associated end plate and are furthermore both simple in technical production terms and cost-effective. Furthermore, a significant advantage is that the localised securing of the non-woven to the end plate can be carried out in an automated manner.
A resiliency pretensioned bypass valve is advantageously arranged on the end plate. In order to be able to ensure a fluid flow through the ring filter element even in the event of clogged filter material (web material), there is provided in the region of the end plate a bypass valve which opens in accordance with a fluid pressure which occurs and thereby bypasses the filter material. Even in the event of blocked or clogged filter material, a fluid flow through the ring filter element may thereby still be maintained.
In another advantageous embodiment of the solution according to the invention, there is provided an inner frame which connects the two end plates. This inner frame is used in this instance to support the filter material and may, for example, be constructed from metal or plastic material. Furthermore, it is conceivable for the inner frame to be constructed in the manner of bellows, with annulariy extending wave peaks and wave troughs. In the region of these wave peaks or wave troughs, through-openings are provided in order to make the inner frame continuous.
In an advantageous development of the solution according to the invention, the non-woven is constructed in an annular manner and at least partially, preferably even completely, covers the end plate. In this instance, it should be noted that the
larger the non-woven which is secured in a localised manner to the end plate is, the greater the dust-absorption capacity thereof also is. Of course, it is conceivable in this instance to determine the size and in particular also an axial thickness of the non-woven in accordance with requirements and in an individual manner.
The present invention is further based on the general notion of providing a spin-on filter having a metal or plastic housing and a ring filter element described above so that the advantages of the ring filter element described in the previous paragraphs can be transferred to the spin-on filter.
In an advantageous development of the spin-on filter according to the invention, the non-woven is arranged at an unprocessed side. It is thereby already possible to absorb dust before the fluid which is intended to be cleaned passes through the filter material, whereby the service-life thereof can be extended. Additionally or al ternatively, there may also be provision for the non-woven to be arranged on both end plates or only on the end plate which is arranged at the side facing away from an influx opening. With an arrangement of the non-woven on both end plates, an even further improved dust absorption may be achieved, wherein, however, in particular with an arrangement of the non-woven on the end plate adjacent to the influx opening, a pressure loss has to be accepted, in the opposing end plate, however, rt is also possible to achieve a not inconsiderable dust absorption, wherein in this instance the pressure loss can be minimized.
Other important features and advantages of the invention will be appreciated from the dependent claims, the drawing and the associated description of the Figures with reference to the drawing.
Of course, the features mentioned above and those about to be explained below can be used not only in the combination set out, but also in other combinations or alone, without departing from the scope of the present invention.
A preferred embodiment of the invention is illustrated in the drawing and is explained in greater detail in the following description.
The single Figure 1 is a sectioned illustration through a spin -on filter according to the invention.
According to Figure 1 , a spin-on filter 1 according to the invention has a housing, in particular a plastic material housing ora metal housing 2, and a ring filter element 3 which is arranged therein. The ring filter element 3 is in this instance flowed through radially from the outer side to the inner side and has a pleated star-like member of a filter material 4 which is folded in a zigzag manner. End edges 5 of the filter element 4 are in this instance connected to end plates 6 and 7 in a sealing manner. According to the invention there is now arranged on at least one end plate 6, 7, in this instance on the lower end plate 6, at an outer side facing away from the filter material 4, a non-woven 8 which is connected to the end plate 6 exclusively in a localised manner, that is to say, at individual securing locations 9. Of course, it is also purely theoretically conceivable for such a non-woven 8 to be connected in a localised manner at an outer side of the upper end plate 7. The ring filter element 3 may in this instance be constructed as an oil filter, water filter, urea filter or a fuel filter.
As a result of the non-woven 8 according to the invention which in this instance is not flowed through in the manner of other filter materials, but instead is only subjected to a flow, a dust absorption or dirt absorption is possible at an unprocessed side of the ring filter element 3, whereby the useful life and the service-life of the ring filter element 3 or the filter material 4 thereof can be significantly increased.
The end plate 6, 7 to which the non-woven 8 is secured in a localised manner may in this instance, for example, be formed from plastic material or also from a non- woven, wherein in this instance the non-woven used for the end plate 6, 7 is compressed and not permeable. The non-woven used for the end plate 6, 7 may in this
instance be of the same non-woven material as the non-woven 8, wherein the non- woven 8 which is arranged or secured in a localised manner at an outer side of the end plate 6 or 7 is not compressed. The term "not compressed" is in this instance intended to be understood to mean only that it is not compressed with the exception of the securing locations 9, wherein "not compressed" is not intended to be understood to be a slight compression, for example, as a result of the installation of the ring filter element 3 in the metal or plastic housing 2.
Filtration properties of the non-woven 8 are only given if the non-woven 8 is not compressed - therefore it is only selectively welded with the end plate 6. This is the important difference to the prior art, in which the entire end plate is welded flat, whereby no more filtration properties are available.
The non-woven 8 is adhesively bonded or welded to the end plate 6, 7 in a localised manner so that the securing locations 9 may be adhesive locations or welding locations. It is thereby possible to achieve a securing of the non-woven 8 to the associated end plate 6, 7 which is not only simple in technical production terms but also reliable and cost-effective.
For the nonproven 8 the following materials may be considered a niddle punched non-woven with or without gradient structure made up of nylon or polyester or any synthetic fibre based material.
If Figure 1 is considered further, it can be seen that there is arranged on the end plate 6 a resiliently pretensioned bypass valve 10 which in the event of a blocked or clogged filter material 4 enables a bypass between the unprocessed side and a clean side of the ring filter element 3 and which ensures a fluid throughflow through the spin-on filter 1 according to the invention, even in the event of clogged filter material 4.
If Figure 1 is considered further, it can be seen that there is provided an inner frame 11 which connects the two end plates 6, 7 to each other and which supports the
filter materia) 4 in an inward direction. The inner frame 11 may in this instance be constructed from plastic material or from metal. Additionally or alternatively, a specific shape of the inner frame 11 may also be provided so that it is constructed in this instance in the manner of bellows, with annulariy extending wave peaks 12 and wave troughs 13. It is thereby possible to achieve further reinforcement of the inner frame 11. Of course, the inner frame 11 has through-openings 14 through which the fluid which has passed through and been cleaned by the filter material 4 can again flow out into an inner space of the ring filter element and from there out of the spin-on filter 1 via a discharge opening 15.
If the non-woven 8 is considered further, it can be seen that it is constructed in an annular manner and covers the end plate 6 at least partially, in this instance even almost completely. The size of the non-woven 8 and in particular also the axial thickness thereof may in this instance be selected in accordance with requirements. As a result of the non-woven 8 only being arranged on the lower end plate 6, a significant dust absorption or dirt absorption (increase of up to approximately 10% or more depending on thickness of non-woven and space available at the bottom or top end plate or kept below the bottom spring) can still be achieved without the pressure loss as a result of a flow resistance being significantly influenced thereby. The non-woven 8 is in this instance arranged at the unprocessed side and is according to Figure 1 secured in a localised manner to the lower end plate 6 which is arranged at a side of the ring filter element 3 facing away from the influx openings 16. Of course, it is also conceivable in this instance for such a non-woven 8 to be secured or arranged in a localised manner at the upper end plate 7, whereby the dust absorption could be increased again.
On the whole, a significant increase of a possible dust absorption or dirt absorption and consequently a significant increase of the useful life of the ring filter element 3 or the spin-on filter 1 can be achieved with the ring filter element 3 according to the invention and the spin-on filter 1 according to the invention.
Claims
1. Ring filter element (3) which can be radially flowed through having a filter material (4) which is folded in particular in a zigzag manner and having end plates (6, 7) which seal the end edges (5),
characterized in that
at least at one end plate (6,7) at an outer side facing away from the filter material (4) there is arranged a non-woven (8) which is connected only in a localised manner to the end plate (6,7).
2. Ring filter element according to Claim 1 ,
characterized in that
at least the end plate (6,7), to which the non-woven (8) is secured in a localised manner by means of securing locations (9), is constructed from plastic material or a compressed non-woven material.
3. Ring filter element according to Claim 1 or Claim 2,
characterized in that
the non-woven (8) is adhesively bonded or welded in a localised manner to the end plate (6,7).
4. Ring filter element according to any one of the preceding claims,
characterised in that
a resiliently pretensioned bypass valve (10) is arranged on the end plate (6).
5. Ring filter element according to any one of the preceding claims,
characterised in that
there is provided an inner frame (11 ) which connects the two end plates (6,7).
6. Ring filter element according to Claim 5,
characterised in that
- the inner frame (11 ) is constructed from metal or plastic material, and/or
- in that the inner frame (11 ) is constructed in the manner of bellows with annulariy extending wave peaks (12) and wave troughs (13).
7. Ring filter element according to any one of the preceding claims,
characterised in that
the ring filter element (3) is constructed as an oil filter, fuel filter, urea filter or a water filter.
8. Ring filter element according to any one of the preceding claims,
characterised in that
the non-woven (8) is constructed in an annular manner and at least partially, preferably completely, covers the end plate (6,7).
9. Spin-on filter (1) having a metal or plastic housing (2) and a ring filter element (3) which is arranged therein according to any one of the preceding claims.
10. Spin-on filter according to Claim 9,
characterized in that
- the non-woven (8) is arranged at an unprocessed side, and/or
- the non-woven (8) is arranged on both end plates (6,7) or on the end plate (6) which is arranged at the side facing away from an influx opening (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IN2018/050774 WO2020105060A1 (en) | 2018-11-22 | 2018-11-22 | Ring filter element which can be radially flowed through |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IN2018/050774 WO2020105060A1 (en) | 2018-11-22 | 2018-11-22 | Ring filter element which can be radially flowed through |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2020105060A1 true WO2020105060A1 (en) | 2020-05-28 |
Family
ID=64744778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IN2018/050774 Ceased WO2020105060A1 (en) | 2018-11-22 | 2018-11-22 | Ring filter element which can be radially flowed through |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2020105060A1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0559011A1 (en) * | 1992-03-02 | 1993-09-08 | Knecht Filterwerke Gmbh | Ring filter element with the endwalls covered tightly by a sealing material in flat or film-like disposition |
| DE19507163A1 (en) * | 1995-03-01 | 1996-09-12 | Knecht Filterwerke Gmbh | Radial flow annular filter |
| EP0773052A1 (en) | 1995-11-07 | 1997-05-14 | Knecht Filterwerke Gmbh | Radially traversed ring filter element |
| DE19641369A1 (en) * | 1996-10-08 | 1998-04-09 | Mann & Hummel Filter | Filter insert for filter unit removing particles from a liquid |
| DE202009018835U1 (en) * | 2009-12-10 | 2013-11-14 | Mann + Hummel Gmbh | filter cartridge |
| DE102015214771A1 (en) * | 2015-08-03 | 2017-02-09 | Mahle International Gmbh | liquid filter |
| US9914080B2 (en) | 2015-06-12 | 2018-03-13 | Hyundai Motor Company | Fuel filter for vehicle |
-
2018
- 2018-11-22 WO PCT/IN2018/050774 patent/WO2020105060A1/en not_active Ceased
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0559011A1 (en) * | 1992-03-02 | 1993-09-08 | Knecht Filterwerke Gmbh | Ring filter element with the endwalls covered tightly by a sealing material in flat or film-like disposition |
| DE19507163A1 (en) * | 1995-03-01 | 1996-09-12 | Knecht Filterwerke Gmbh | Radial flow annular filter |
| EP0773052A1 (en) | 1995-11-07 | 1997-05-14 | Knecht Filterwerke Gmbh | Radially traversed ring filter element |
| DE19641369A1 (en) * | 1996-10-08 | 1998-04-09 | Mann & Hummel Filter | Filter insert for filter unit removing particles from a liquid |
| DE202009018835U1 (en) * | 2009-12-10 | 2013-11-14 | Mann + Hummel Gmbh | filter cartridge |
| US9914080B2 (en) | 2015-06-12 | 2018-03-13 | Hyundai Motor Company | Fuel filter for vehicle |
| DE102015214771A1 (en) * | 2015-08-03 | 2017-02-09 | Mahle International Gmbh | liquid filter |
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