GB2333247A - Lock mechanism for a filter housing - Google Patents
Lock mechanism for a filter housing Download PDFInfo
- Publication number
- GB2333247A GB2333247A GB9800924A GB9800924A GB2333247A GB 2333247 A GB2333247 A GB 2333247A GB 9800924 A GB9800924 A GB 9800924A GB 9800924 A GB9800924 A GB 9800924A GB 2333247 A GB2333247 A GB 2333247A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filter
- filter housing
- head
- housing
- filter head
- 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.)
- Withdrawn
Links
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 description 13
- 238000005755 formation reaction Methods 0.000 description 13
- 239000000446 fuel Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000000356 contaminant Substances 0.000 description 3
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/30—Filter housing constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/40—Special measures for connecting different parts of the filter
- B01D2201/4015—Bayonet connecting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/40—Special measures for connecting different parts of the filter
- B01D2201/4076—Anti-rotational means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/40—Special measures for connecting different parts of the filter
- B01D2201/4084—Snap or Seeger ring connecting means
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
A filter arrangement, comprises filter housing and a filter head, the filter housing 12 and filter head 10 including cooperating regions arranged to permit the filter housing 12 to be secured to the filter head 10, and a lock arrangement 24, 26, 28 whereby undesirable angular movement of the filter housing 12 relative to the filter head 10 is restricted, the lock arrangement 24, 26, 28 comprising a projection 28 associated with one of the filter housing 12 and the filter head 10, the projection 28 being engageable with an abutment 24 associated with the other of the filter housing 12 and the filter head 10 to restrict relative angular movement of the filter housing 12 and the filter head 10, at least one of the projection 28 and the abutment 24 being displaceable in a generally radial direction to disengage the projection 28 from the abutment 24 to permit relative angular movement of the filter housing 12 and filter head 10, thereby permitting removal of the filter housing 12 from the filter head 10. The filter head 10 is preferably secured to the filter housing 12 by angular movement of one relative to the other. The lock mechanism may require manual disengagement before movement of the filter housing can commence.
Description
FILTER ARRANGEMENT
This invention relates to a filter arrangement for use in removing contaminants from a supply of fuel to a high pressure fuel pump.
It is usual to include a fuel filter in a fuel system for an engine in order to avoid the transmission of contaminants with the fuel supplied towards the high pressure fuel pump of the fuel system as such contaminants may impair the operation of the fuel pump or the associated engine. In use, the filter medium of the fuel filter gradually becomes choked and requires replacement. In order to permit such replacement, it is known to incorporate a filter head in the fuel system, a removable filter housing being securable upon the filter head, the filter medium being located within the filter housing. When the filter medium requires replacement, the filter housing is removed, the old filter medium is replaced with a fresh filter medium, and the filter housing is secured to the filter head.
Alternatively, the filter medium may be permanently secured within the filter housing in which case replacement of the filter medium also requires the filter housing to be replaced.
A number of techniques for securing the filter housing to the filter head are known. It is convenient to use a technique in which no tools are required to secure the filter housing in position. However, it is difficult to secure the filter housing sufficiently tightly without using tools to avoid the filter housing working loose, in use, for example as a result of engine vibrations.
It is an object of the invention to provide a filter arrangement in which assembly does not require the use of tools and in which undesirable loosening of the filter housing from the filter head is avoided.
According to the present invention there is provided a filter arrangement comprising a filter housing and a filter head, the filter housing and filter head including cooperating regions arranged to permit the filter housing to be secured to the filter head, and a lock arrangement whereby undesirable angular movement of the filter housing relative to the filter head to remove the filter housing from the filter head is restricted, the lock arrangement comprising a projection associated with one of the filter housing and the filter head, the projection being engageable with an abutment associated with the other of the filter housing and the filter head to restrict relative angular movement of the filter housing and the filter head, at least one of the projection and the abutment being displaceable in a generally radial direction to disengage the projection from the abutment to permit relative angular movement of the filter housing and filter head, thereby permitting removal of the filter housing from the filter head.
The cooperating regions may take the form of screw-threaded regions, bayonet coupling components or any other features which permit the filter housing to be secured to the filter head by angular movement of the filter housing relative to the filter head.
The lock arrangement may require disengagement before movement of the filter housing is permitted to commence. Alternatively, the lock arrangement may disengage automatically after initial movement of the filter housing, the lock arrangement requiring a high initial force to be applied to the filter housing to overcome the action of the lock arrangement, a lower force being sufficient to release the filter housing once the action of the lock arrangement has been overcome.
The invention will further be described, by way of example, with reference to the accompanying drawings in which like reference numerals are used to denote like parts, and in which:
Figures la and ib are plan and side views, with the filter head shown in section, of a filter arrangement in accordance with an embodiment of the invention
Figure 2 is a view similar to Figure la illustrating the filter arrangement in its unlocked condition;
Figures 3a, and 3b are views similar to Figures 1a and 2 illustrating an alternative embodiment;
Figures 4a and 4k are views similar to Figures la and 112 illustrating a further embodiment;
Figure 5 is a view similar to Figure 4a illustrating a modification;
Figures 6a and 6k are views illustrating a further embodiment;
Figures 7, 8 and 9 illustrate modifications to the embodiment of Figures 6a and 6b; and
Figures loa and 10k illustrate a further embodiment.
The filter arrangement illustrated in Figures la and 112 comprises a filter head 10 to which is secured a filter housing 12 containing a filter element. The filter head 10 includes appropriate ports to permit connection of the filter arrangement to a fuel system and passages to permit fuel to flow through the filter head 10 to the filter housing 12, through the filter element located within the housing 12 and back into the filter head 10 to be supplied to a high pressure pump forming part of the fuel system. The filter head 10 includes an axially extending bore or recess 14 within which screw-thread formations 16 are provided, the screw-thread formations 16 being arranged to cooperate with corresponding screw-thread formations 20 provided on a projection 18 extending from the upper part of the filter housing 12. The formations 16, 20 are of pitch such that rotation of the filter housing 12 through 1800 moves the filter housing 12 between its released and 'in-use' positions.
As shown in Figure 1b, the upper part of the filter housing 12 is also provided with a formation 22 which is shaped to define a pair of abutment surfaces 24 and a pair of ramped regions 26. The abutment surfaces 24 and ramped regions 26 are arranged to cooperate with projections 28 which extend inwardly from a flexible skirt 30 forming part of the filter head 10.
In use, in order to secure the filter housing 12 to the filter head, the screw-thread formations 16, 20 are brought into engagement with one another, and the filter housing 12 is moved angularly with respect to the filter head 10 about the axis of the filter housing 12. Such movement of the filter housing 12 subsequently results in the projections 28 moving into engagement with the ramped regions 26, continued movement of the filter head 12 causing the flexible skirt 30 to deform permitting the projections 28 to move radially outward, riding over the ramped regions 26, the movement of the filter housing 12 eventually reaching a point at which the projections 28 ride over the ends of the ramped regions 26, the projections 28 then being engageable with the abutment surfaces 24.
Once this position is reached, it will be appreciated that rotation of the filter housing 12 in the reverse direction is restricted by engagement of the projections 28 with the abutment surfaces 24 thus undesirable release of the filter housing 12 from the filter head 10 is avoided.
When it is desired to release the filter housing 12 from the filter head 10, the flexible skirt 30 is deformed as illustrated in Figure 2. Such deformation of the flexible skirt 30 results in radial outward movement of the projections 28, thus moving the projections 28 out of engagement with the abutment surfaces 24. Rotational movement of the filter housing 12 with respect to the filter head 10 to release the filter housing 12 from the filter head 10 is then permitted.
It will be appreciated that the arrangement illustrated in Figures la, 112 and 2 is advantageous in that the filter housing 12 can be secured to the filter head 10 without the use of tools, and that an arrangement is provided whereby undesirable release of the filter housing 12 from the filter head 10 can be avoided.
It is further advantageous to provide a resilient member 32 located upon the filter housing 12 which is engageable with the filter head 10, the resilient member 32 being compressed as the filter housing 12 is secured to the filter head 10 and applying a downward force to the filter housing 12 resulting in an increase in the frictional force between the screw threaded formations 16, 20 of the filter housing 12 and filter head 10, thus further reducing the risk of the filter housing 1 2 working loose, in use.
The arrangement illustrated in Figures 3a and 3b is similar to that of
Figures la, 112 and 2, but differs therefrom in that the abutment surfaces 24 are of ramped form, and the projections 28 are correspondingly shaped so as to conform with the abutment surfaces 24. The method used to secure the filter housing 12 to the filter head 10 is as described hereinbefore, and so will not be described in further detail. The method for removing the filter housing 12 from the filter head 10 differs from that described hereinbefore in that rather than applying a force directly to the skirt 30 to deform the skirt 30 and move the projections 28 out of engagement with the abutment surfaces 24, the filter housing 12 is rotated in the direction necessary to remove the filter housing 12 from the filter head 10, a relatively large torque being applied to the filter housing 12, the torque being sufficient to result in the projections 28 riding over the ramped abutment surfaces 24, the projections moving radially outwards and deforming the skirt 30 until the projections 28 engage the ramped regions 26 whereafter the method for removing the filter housing 12 is as described hereinbefore.
It will be appreciated that the method used in the embodiment of Figures 3a and 3b for removing the filter housing 12 from the filter head 10 is simpler than that used in the embodiment of Figures la, 112 and 2 in that the separate initial step of deforming the skirt is not required, but that a relatively large force must be applied to the filter housing 12 to cause initial movement of the filter housing 12 to deform the flexible skirt 30.
The arrangement illustrated in Figures 4a and 4b differs from that described hereinbefore in that the projection 28 is provided upon the filter housing 12 and comprises an upstanding tooth 28 which is engageable with an abutment surface 24 defined by a spring member 34 which is secured to the skirt 30 of the filter head 10. In this embodiment, the skirt 30 is rigid. The spring member 34 is shaped so as to define a ramped region 26 which terminates at the abutment surface 24. The free end of the spring member 34 is secured to a displacement member 36 which is biased by a spring 38 towards the position illustrated in Figure 4a Depression of the displacement member 36 against the action of the spring 38 causes movement of the spring member 34 in an inward direction, displacing the position of the abutment surface 24 inwards by an amount sufficient to permit disengagement of the abutment surface 24 from the projection 28.
In order to secure the filter housing 12 to the filter head in this embodiment, the screw-threaded formations of the filter housing and filter head are moved into engagement with one another with the projection 28 initially occupying the position illustrated by the dashed lines in Figure 4a. From this position, the filter housing 12 is rotated, compressing the resilient member 32 as described hereinbefore, and causing the projection 28 to move into engagement with the ramped region 26 defined by the spring 34, eventually causing the projection 28 to ride over the end of the ramped region 26 and into a recess 40 defined, in part, by the abutment surface 24. Once the projection 28 is located within the recess 40, it will be appreciated that angular movement of the filter housing 12 relative to the filter head 10 is restricted.
In order to release the filter housing 12 from the filter head 10, the displacement member 36 is displaced inwardly until the abutment surface 24 is moved out of the engagement with the projection 28 whereupon movement of the filter housing 12 relative to the filter head 10 to release the filter housing 12 is substantially unrestricted.
Figure 5 illustrates a modification to the arrangements of Figures 4a and 412. In the arrangement of Figure 5, a second projection 28 is provided on the filter housing 12 such that as the first projection 28 rides over the ramped region 26 of the spring member 34, the second projection 28 moves into engagement with a detent portion 42 of the spring member 34, the second projection 28 moving into a recess defined, in part, by the detent portion 42 when the first projection 28 occupies the recess 40.
The method for assembling this embodiment is similar to that described with reference to Figures 4a and 4b, but it will be appreciated that an additional force must be applied to the filter housing 12 as the filter housing 12 approaches its operative position in order to cause the second projection 28 to ride over the detent portion 42. In order to release the filter housing 12 from the filter head 10, the displacement member 36 is pushed inwardly to move the abutment surface 24 out of engagement with the first projection 28. Once such movement of the spring member 34 has occurred, a relatively large initial force must be applied to the filter housing 12 in order to cause the second projection 28 to ride over the detent portion 42. Once such movement has occurred, the force which must be applied to the filter housing 12 in order to release the filter housing 12 from the filter head 10 can be reduced.
Figures 6a and 6b illustrate, respectively, part of a filter head 10 and the upper part of a filter housing 12. As illustrated in Figure 6a, the filter housing 10 is provided with a rigid skirt 30 to which is secured a pair of spring members 34 each of which is shaped so as to define a ramped region 26 and an abutment surface 24 forming part of a recess 40. Each of the abutment surfaces 24 is of ramped form rather than extending in a true radial direction.
The upper part of the filter housing 12 is provided with a pair of projections 28, the radially outer part of each projection 28 including a ramped upper surface in order to ensure that upon initial insertion of the upper part of the filter housing 12 into the filter head 10, should engagement occur between the projections 28 and spring members 34, then the ramped portions of the projections 28 deflect the spring members 34 radially outwards.
As described hereinbefore, in order to secure the filter housing 12 to the filter head 10, the filter housing 12 is rotated relative to the filter head 10, the screw-threaded formations of the filter housing 12 and filter head 10 cooperating with one another to secure the filter housing 12 to the filter head 10. The angular movement of the filter housing 12 relative to the filter head 10 causes the projections 28 to ride over the ramped regions 26 defined by the spring members 34, movement of the filter housing 12 continuing until the projections 28 ride over the ramped regions 26 into the recesses 40 defined, in part, by the abutment surfaces 24. It will be appreciated that once in this position, rotation of the filter housing 12 to release the filter housing 12 from the filter head 10 is resisted by the engagement between the projections 28 and the abutment surfaces 24.
In order to remove the filter housing 12 from the filter head 10, a relatively large initial force must be applied to the filter housing 12 to cause the projections 28 to ride over the ramped abutment surfaces 24, such movement causing the spring members 34 to be displaced radially outwards. Once the projections 28 have ridden over the abutment surfaces 24, rotation of the filter housing 12 continues until the filter housing 12 is released from the filter head 10.
Figure 7 illustrates a slight modification to the arrangement of Figures 6a and 6b, the spring members 34 of the arrangement of Figure 7 being shaped at their free ends in order to promote sliding movement of the spring members 34 on the inner surface of the skirt 30, such sliding movement occurring upon deflection of the spring members 34, in use.
Further, Figure 7 illustrates that the surfaces of the projections 28 which engage the abutment surfaces 24, in use, may be angled to cooperate with the abutment surfaces 24.
In each of the embodiments described hereinbefore, a separate resilient member 32 is located between the filter head 10 and filter housing 12 in order to apply a downward force to the filter housing 12. In the arrangement of Figure 8, the resilient member 32 is modified to incorporate the spring members 34, the resilient member 32 of this arrangement being intended to be secured to the filter head 10 rather than to the filter housing 12 as in each of the previously described embodiments. The unit comprising the resilient member 32 and spring members 34 illustrated in Figure 8 may be incorporated in an arrangement similar to that illustrated in Figures 6a and 6b and will not be described in further detail.
The arrangement of Figure 9 is similar to that of Figure 8, but differs therefrom in that separate helical springs 44 are located so as to engage the spring members 34 adjacent the recesses 40 thereof in order to bias the parts of the spring members 34 defining the recesses 40 in a substantially radially inward direction in order to assist in resisting release of the filter housing 12 from the filter head 10.
Figures 10a and 10k illustrate an arrangement in which the lock arrangement comprising the projection 28 and abutment surface 24 are incorporated into the cooperating regions which are used to secure the filter housing 12 to the filter head 10. The filter housing 12 is provided, adjacent its upper end, with an internally screw-threaded region which is arranged to engage external screw-threaded formations provided on the wall 30 of the filter head 10. As illustrated in Figure 1012, located within a recess defined between the screw-thread formations of the filter housing 12 is a spring member 34 of the type described hereinbefore which is engageable with an appropriately shaped projection 28 forming part of the screw-thread formations of the filter head 10.
In order to secure the filter housing 12 to the filter head 10, the filter housing 12 is located to bring the screw-thread formations of the filter housing 12 into engagement with those of the filter head 10, and the filter housing 12 is rotated relative to the filter head 10. Such rotation causes the projection 28 to ride over a ramped region 26 defined by the spring member 34, rotation continuing until the projection 28 is located within a recess 40 defined, in part, by an abutment surface 24 of the spring member 34. As described hereinbefore, once this position is reached, rotation of the filter housing 12 relative to the filter head 10 is resisted.
When it is desired to release the filter housing 12 from the filter head 10, a relatively large force must be applied to the filter housing 12 to cause the spring member 34 to be displaced radially outward by the engagement of the projection with the ramped abutment surface 24.
Once such displacement of the spring member 34 has occurred, continued rotation of the filter housing 12 occurs with a relatively low load applied to the filter housing 12.
Although in the embodiments described hereinbefore, the filter housing 12 and filter head 10 are secured to one another by means of a screwthreaded connection, it will be appreciated that any other connection in which the filter housing 12 is secured to the filter head by means of adjusting the angle of the filter housing 12 relative to the filter head could be used, for example the connection could take the form of a bayonet-type connection between the filter housing and the filter head.
Further, in each of the embodiments, the radial location of the connection between the filter housing and filter head may be changed, for example the screw-threaded or other connection may be located adjacent the outer periphery of the filter housing rather than adjacent the centre, and also the connections may be reversed so that, for example, rather than provide the filter head with a female thread, the filter head may be provided with an external, male thread and the filter housing with an internal, female thread, if desired.
Claims (5)
1. A filter arrangement comprising a filter housing and a filter head, the filter housing and filter head including cooperating regions arranged to permit the filter housing to be secured to the filter head, and a lock arrangement whereby undesirable angular movement of the filter housing relative to the filter head to remove the filter housing from the filter head is restricted, the lock arrangement comprising a projection associated with one of the filter housing and the filter head, the projection being engageable with an abutment associated with the other of the filter housing and the filter head to restrict relative angular movement of the filter housing and the filter head, at least one of the projection and the abutment being displaceable in a generally radial direction to disengage the projection from the abutment to permit relative angular movement of the filter housing and filter head, thereby permitting removal of the filter housing from the filter head.
2. A filter arrangement as claimed in Claim 1, wherein the cooperating regions take the form of screw-threaded regions, bayonet coupling components or other features which permit the filter housing to be secured to the filter head by angular movement of the filter housing relative to the filter head.
3. A filter arrangement as claimed in Claim 1 or Claim 2, wherein the lock arrangement requires disengagement before movement of the filter housing is allowed to commence.
4. A filter arrangement as claimed in Claim 1 or Claim 2, wherein the lock arrangement disengages automatically after initial movement of the filter housing, the lock arrangement requiring a high initial force to be applied to the filter housing to overcome the action of the lock arrangement, a lower force being sufficient to release the filter housing once the action of the lock arrangement has been overcome.
5. A filter arrangement substantially as hereinbefore described with reference to any one of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9800924A GB2333247A (en) | 1998-01-17 | 1998-01-17 | Lock mechanism for a filter housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9800924A GB2333247A (en) | 1998-01-17 | 1998-01-17 | Lock mechanism for a filter housing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9800924D0 GB9800924D0 (en) | 1998-03-11 |
| GB2333247A true GB2333247A (en) | 1999-07-21 |
Family
ID=10825404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9800924A Withdrawn GB2333247A (en) | 1998-01-17 | 1998-01-17 | Lock mechanism for a filter housing |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2333247A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1423179A1 (en) * | 2001-07-30 | 2004-06-02 | Pentapure Incorporated | Hot disconnect replaceable water filter assembly |
| DE102008002727A1 (en) * | 2008-06-27 | 2009-12-31 | Brita Gmbh | Device for the treatment of water, in particular filter device, and cartridge |
| DE102010041664A1 (en) * | 2010-09-29 | 2012-03-29 | Brita Gmbh | Fluid i.e. drinking water, treating device, has holding element coacting with fastening section for fastening cartridge at container in closing position, and actuating element coacting with holding element in closing position |
| DE102013019884A1 (en) * | 2013-11-28 | 2015-05-28 | Mann + Hummel Gmbh | Filter system with screw cap |
| US9067154B1 (en) | 2014-11-06 | 2015-06-30 | 3M Innovative Properties Company | Replacement filter cartridge |
| DE102008064945B3 (en) * | 2008-06-27 | 2021-05-27 | Brita Gmbh | Device for treating water, in particular filter device and cartridge |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2052297A (en) * | 1979-05-14 | 1981-01-28 | Wilkerson Corp | Bowl guard |
| WO1987007176A1 (en) * | 1986-05-30 | 1987-12-03 | Caterpillar Inc. | Twist on disposable filter |
| EP0249395A2 (en) * | 1986-06-03 | 1987-12-16 | Facet Enterprises, Inc. | Filter assembly |
| GB2222534A (en) * | 1988-09-09 | 1990-03-14 | Process Scient Innovations | Filter assembly |
| EP0231862B1 (en) * | 1986-01-27 | 1994-05-04 | Cuno Incorporated | Quick-change filter cartridge and head therefor |
-
1998
- 1998-01-17 GB GB9800924A patent/GB2333247A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2052297A (en) * | 1979-05-14 | 1981-01-28 | Wilkerson Corp | Bowl guard |
| EP0231862B1 (en) * | 1986-01-27 | 1994-05-04 | Cuno Incorporated | Quick-change filter cartridge and head therefor |
| WO1987007176A1 (en) * | 1986-05-30 | 1987-12-03 | Caterpillar Inc. | Twist on disposable filter |
| EP0249395A2 (en) * | 1986-06-03 | 1987-12-16 | Facet Enterprises, Inc. | Filter assembly |
| GB2222534A (en) * | 1988-09-09 | 1990-03-14 | Process Scient Innovations | Filter assembly |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE45080E1 (en) | 2001-07-30 | 2014-08-19 | 3M Innovative Properties Company | Hot disconnect replaceable water filter assembly |
| EP1423179B1 (en) * | 2001-07-30 | 2007-12-05 | 3M Innovative Properties Company | Hot disconnect replaceable water filter assembly |
| US7481928B2 (en) | 2001-07-30 | 2009-01-27 | 3M Innovative Properties Company | Hot disconnect replaceable water filter assembly |
| EP1423179A1 (en) * | 2001-07-30 | 2004-06-02 | Pentapure Incorporated | Hot disconnect replaceable water filter assembly |
| US7799220B2 (en) | 2001-07-30 | 2010-09-21 | 3M Innovative Properties Company | Hot disconnect replaceable water filter assembly |
| USRE46554E1 (en) | 2001-07-30 | 2017-09-19 | 3M Innovative Properties Company | Hot disconnect replaceable water filter assembly |
| US8182699B2 (en) | 2001-07-30 | 2012-05-22 | 3M Innovative Properties Company | Method of engaging a filter cartridge to a manifold and filter cartridge therefor |
| DE102008002727A1 (en) * | 2008-06-27 | 2009-12-31 | Brita Gmbh | Device for the treatment of water, in particular filter device, and cartridge |
| US9789427B2 (en) | 2008-06-27 | 2017-10-17 | Brita Gmbh | Apparatus for treating water, particularly filter apparatus, and cartridge |
| DE102008002727B4 (en) * | 2008-06-27 | 2020-12-17 | Brita Gmbh | Device for treating water, in particular a filter device, and cartridge |
| DE102008064945B3 (en) * | 2008-06-27 | 2021-05-27 | Brita Gmbh | Device for treating water, in particular filter device and cartridge |
| DE102010041664A1 (en) * | 2010-09-29 | 2012-03-29 | Brita Gmbh | Fluid i.e. drinking water, treating device, has holding element coacting with fastening section for fastening cartridge at container in closing position, and actuating element coacting with holding element in closing position |
| DE102013019884A1 (en) * | 2013-11-28 | 2015-05-28 | Mann + Hummel Gmbh | Filter system with screw cap |
| DE102013019884B4 (en) * | 2013-11-28 | 2020-12-24 | Mann+Hummel Gmbh | Filter system with screw cap and its use as an oil filter |
| US9067154B1 (en) | 2014-11-06 | 2015-06-30 | 3M Innovative Properties Company | Replacement filter cartridge |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9800924D0 (en) | 1998-03-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |