Filter cartridge, system, and methods

Abstract

A filter system includes a filter bowl, a filter cartridge removably positionable within the interior of the bowl, and a filter head removably mounted over the bowl. A flow restriction valve is held by the filter head. The flow restriction valve has a pin-receiving opening. The opening has a first cross-sectional shape. A pin is secured to the filter cartridge. The pin has a second cross-sectional shape, which is different from the first cross-sectional shape, and is configured to promote fluid flow around the pin when the filter cartridge is operably installed in the filter bowl. A coalescer filter cartridge includes a pin secured to or part of a hydrophobic screen assembly.

Description

FILTER CARTRIDGE, SYSTEM, AND METHODSCross-Reference to Related Application

[0001] This application claims the benefit of U.S. Provisional Application No. 63 / 659.677, filed on June 13, 2024, entitled FILTER CARTRIDGE, SYSTEM, AND METHODS. The disclosure of which is hereby incorporated by reference in its entirety. To the extent appropriate, a claim of priority is made to the above disclosed application.Technical Field

[0002] This disclosure relates to fluid filtration systems. In particular, this disclosure relates to filtration systems useable for filtering fuel.Background

[0003] In many applications, it is desirable to have a fuel filtration system in which the flow of fuel to an engine is prevented if no filter cartridge is installed, or if an incorrect filter cartridge is installed. The operation of an engine with no filter cartridge installed or with an incorrect filter cartridge installed may result in a degradation of engine performance or permanent damage to the engine. Fuel filtration systems like this are in the prior art. and improvements are desirable.Summary

[0004] In general, a filter cartridge is provided comprising: (a) filter media having an inner cavity, a first end, and an opposite second end; (b) an inner liner within the inner cavity; (c) a first end plate secured to the first end of the filter media; (d) a second end plate secured to the second end of the filter media; and (e) a projecting pin projecting from the inner cavity and having a free end extending beyond the first end of the filter media; the pin being free of attachment to the first end plate and second end plate; and wherein the pin is integral with the inner liner.

[0005] In general, a filter cartridge is provided comprising: (a) filter media having an inner canty, a first end, and an opposite second end; (b) an inner liner within the inner cavity; (c) a first end plate secured to the first end of the filter media; (i) the first end plate having two or more projections defining a support plane; (d) a second end plate secured to thesecond end of the filter media; and (e) at least one projecting pin in the inner cavity oriented orthogonal to the support plane; and wherein the pin is integral with the inner liner.

[0006] In general, a filter cartridge is provided comprising: (a) filter media having an inner cavity, a first end, and an opposite second end; (b) an inner liner within the inner cavity; (i) the inner liner having an open end adjacent to the first end of the filter media; the open end being within a plane; and (c) a projecting pin projecting from the inner cavity and having a free end traversing the plane containing the open end of the inner liner; and wherein the pin is integral with the inner liner.

[0007] In general, a filter cartridge is provided comprising: (a) filter media having an inner cavity, a first end, and an opposite second end; (b) an inner liner within the inner cavity; (c) a first end plate secured to the first end of the filter media; (i) the first end plate defining a first end plane; (d) a second end plate secured to the second end of the filter media; and (e) a projecting pin projecting from the inner cavity' and having a free end extending beyond the first end plane; and wherein the pin is integral with the inner liner.

[0008] In some embodiments, there further includes a seal member mounted on the first end plate.

[0009] In some embodiments, the seal member comprises an axial seal member defining a sealing plane; and wherein the free end of the projecting pin does not project beyond the sealing plane.

[0010] In examples, the first end plate includes an axially extending spigot; and wherein the seal member comprises a radial seal member mounted on the spigot.

[0011] In some embodiments, the radial seal member is an outwardly directed radial seal member.

[0012] In some implementations, the pin is solid and free of open passageways.

[0013] In some embodiments, the pin has a non-round cross-sectional shape.

[0014] In examples, the pin has a cross-sectional shape including a plurality of lobes.

[0015] In one or more arrangements, the pin has a cross-sectional shape including a plurality of lobes and a plurality of curved sections.

[0016] In example embodiments, the filter media is pleated media, having a cylindrical shape.

[0017] Some embodiments further include (a) a first end plate secured to the first end of the filter media; and (b) a second end plate secured to the second end of the filter media.

[0018] In example arrangements, there further includes an axial seal member mounted on the first end plate.

[0019] In some examples, the first end plate has at least two projections defining a support plane.

[0020] In some implementations, the at least two projections are radial projections.

[0021] In some arrangements, the first end plate has four projections defining the support plane.

[0022] In examples, the inner liner extends a complete distance between the first end of the filter media and the second end of the filter media.

[0023] Some arrangements include (a) the first end plate has two or more projections defining a support plane; and (b) the at least one projecting pin is oriented orthogonal to the support plane.

[0024] In one or more arrangements, (a) the first end plate defines a first end plane; and (b) the free end of the projecting pin extends beyond the first end plane.

[0025] In some examples, (a) the inner liner has an open end adjacent to the first end of the filter media; the open end being within a plane; and (b) the free end of the projecting pin traversing the plane containing the open end of the inner liner.

[0026] In some embodiments, (a) the first end plate defines a first end plane; and (b) the free end of the pin extends beyond the first end plane.

[0027] In one or more arrangements, (a) a first end plate secured to the first end of the filter media; (i) the first end plate defining a first end plane; (b) a second end plate secured to the second end of the filter media; and (c) the free end of the projecting pin extending beyond the first end plane.

[0028] In an aspect, a filter cartridge is provided comprising: filter media having an inner cavity, a first end, and an opposite second end; a first end plate secured to the first end of the filter media; the first end plate having two or more projections defining a support plane; a second end plate secured to the second end of the filter media; a hydrophobic screen assembly within the inner cavity; the hydrophobic screen assembly having a first screen end and a second screen end; and a pin assembly having at least one projecting pin in the inner cavity oriented orthogonal to the support plane, the pin assembly being at the first screen end.

[0029] In an aspect, a filter cartridge is provided comprising: filter media having an inner cavity, a first end, and an opposite second end; a hydrophobic screen assembly within the inner cavity; the hydrophobic screen assembly having a first screen end and a second screen end; the first screen end being end being an open end; the open end being within a plane; a pin assembly having a projecting pin having a free end traversing the plane containing the open end; the pin assembly being at the first screen end.

[0030] In an aspect, a filter cartridge is provided comprising: filter media having an inner cavity-, a first end, and an opposite second end; a first end plate secured to the first end of the filter media;

[0031] the first end plate defining a first end plane; a second end plate secured to the second end of the filter media; a hydrophobic screen assembly within the inner cavity-; the hydrophobic screen assembly having a first screen end and a second screen end; and a pin assembly having a projecting pin having a free end extending beyond the first end plane; the pin assembly^ being at the first screen end.

[0032] In example embodiments, the pin assembly includes a surrounding wall to form a cup; the cup and the hydrophobic screen assembly being potted to the first end plate.

[0033] In preferred assemblies, the pin assembly includes a pin plate snap fit to the hydrophobic screen assembly, and the hydrophobic screen assembly is potted to the first end plate.

[0034] In one or more arrangements, the pin assembly includes a pin plate press fit to the hydrophobic screen assembly, and the hydrophobic screen assembly is potted to the first end plate.

[0035] In example embodiments, the hydrophobic screen assembly is conically- shaped, wherein the first screen end is larger than the second screen end.

[0036] In preferred assemblies, the first end plate includes an axially extending spigot; and wherein the seal member comprises a radial seal member mounted on the spigot.

[0037] In one or more arrangements, there further includes a first end plate secured to the first end of the filter media; wherein the first end plate includes an axially extending spigot; and wherein the seal member comprises a radial seal member mounted on the spigot.

[0038] In example embodiments, the pin is solid and free of open passageways.

[0039] In preferred assemblies, the pin has a non-round cross-sectional shape.

[0040] In one or more arrangements, the pin has a cross-sectional shape including a plurality- of lobes.

[0041] In example embodiments, the pin has a cross-sectional shape including a plurality of lobes and a plurality of curved sections.

[0042] In preferred assemblies, the filter media is pleated media, having a cylindrical shape.

[0043] In one or more arrangements, the first end plate has two or more projections defining a support plane; and the at least one projecting pin is oriented orthogonal to the support plane.

[0044] In example embodiments, the pin assembly includes a pin plate that is a separate component non-removably attached to the screen assembly.

[0045] In preferred assemblies, the pin assembly is a same molded piece with the screen assembly.

[0046] In an aspect, a filter system is provided comprising: a filter bowl with an interior and an open mouth providing access to the interior; a filter cartridge removably positionable within the interior of the bowl; a filter head removably mounted over the mouth of the bowl; a flow restriction valve held by the filter head; the flow restriction valve having a pin-receiving opening; the opening having a first cross-sectional shape; and a pin secured to the filter cartridge; the pin having a second cross-sectional shape, which is different from the first cross-sectional shape, and is configured to promote fluid flow around the pin when the filter cartridge is operably installed in the filter bowl.

[0047] In an aspect, a method for installing a filter cartridge into a filter system is provided; the method comprising: providing a filter cartridge having a projecting pin; positioning the filter cartridge in a filter bowl; orienting a filter head onto the filter bowl; the filter head having a valve with a pin-receiving opening; the opening having a first cross- sectional shape; and passing the pin through the pin-receiving opening in the valve; the pin having a second cross-sectional shape, which is different from the first cross-sectional shape.

[0048] In an aspect, a method for installing a filter cartridge into a filter system is provided; the method comprising: providing a filter cartridge including filter media having an inner cavity, a first end, and an opposite second end; an inner liner within the inner cavity; and a projecting pin integral with the inner liner; positioning the filter cartridge in a filter bowl; threading a filter head onto the filter bowl; the filter head having a valve with a pinreceiving opening; and while threading, axially translating the pin through the pin-receiving opening in the valve.

[0049] In an aspect, a method for installing a filter cartridge into a filter system is provided; the method comprising: providing a filter cartridge including filter media having an inner cavity, a first end, and an opposite second end; a hydrophobic screen assembly within the inner cavity; the hydrophobic screen assembly having a first screen end and a second screen end; and a pin assembly having a projecting pin having a free end extending beyond the first end of the filter media; the pin assembly being at the first screen end; positioning the filter cartridge in a filter bowl; threading a filter head onto the filter bowl; the filter head having a valve with a pin-receiving opening; and while threading, axially translating the pin through the pin-receiving opening in the valve.

[0050] In example methods, the step of providing a filter cartridge includes the pin assembly includes a pin plate which is a separate component non-removably attached to the screen assembly.

[0051] In example methods, the step of providing a filter cartridge includes the pin assembly being a same molded piece with the screen assembly.

[0052] In example methods, the step of providing a filter cartridge includes a first end plate secured to the first end of the filter media; the first end plate having two or more projections defining a support plane; and wherein the projecting pin is oriented orthogonal to the support plane.

[0053] In example methods, the step of providing a filter cartridge includes the first screen end being end being an open end; the open end being within a plane; and wherein the free end of the projecting pin traverses the plane containing the open end.

[0054] In example methods, the step of providing a filter cartridge includes a first end plate secured to the first end of the filter media; the first end plate defining a first end plane; and wherein the free end of the pin extends beyond the first end plane.

[0055] Examples of dimensions, configurations, and materials are provided to indicate various ways in which principles of this disclosure can be implemented.Brief Description of the Drawings

[0056] FIG. 1 is an exploded perspective view of a filter system, including a bowl, filter cartridge, and filter head, constructed in accordance with principles of this disclosure;

[0057] FIG. 2 is a schematic, cross-sectional view of a portion of a filter cartridge engaging a check valve in the filter head of FIG. 1, constructed in accordance with principles of this disclosure;

[0058] FIG. 3 is a schematic, cross-sectional view of the portion of the filter cartridge of FIG. 2, showing the fluid inlet and the outlet with a check valve;

[0059] FIG. 4 is an end view of the filter cartridge of FIG. 1 ;

[0060] FIG. 5 is a cross-sectional view of the filter cartridge of FIG. 1; the crosssection being taken along line A-A of FIG. 4;

[0061] FIG. 6 is a perspective view of an inner liner having a pin used in the filter cartridge of FIGS. 1, 4, and 5;

[0062] FIG. 7 is a cross-sectional view' of the inner liner of FIG. 6;

[0063] FIG. 8 is an enlarged cross-sectional view of the pin on the inner liner;

[0064] FIG. 9 is a top, plan view of the pin of FIG. 8;

[0065] FIG. 10 is a perspective view of a portion of the filter cartridge of FIG. 5;

[0066] FIG. 11 is a schematic cross-sectional view of the portion of the filter cartridge of FIG. 10;

[0067] FIG. 12 is an enlarged view of a side of the pin used in the filter cartridge of FIGS. 10 and 11;

[0068] FIG. 13 is a top plan view of the pin of FIG. 12;

[0069] FIG. 14 is a cross-sectional view of another embodiment of a filter cartridge, constructed in accordance with principles of this disclosure;

[0070] FIG. 15 is a cross-sectional view of an embodiment of a hydrophobic screen assembly and a first end plate useable in a coalescer filter cartridge, constructed in accordance with principles of this disclosure;

[0071] FIG. 16 is an exploded view of the hydrophobic screen assembly and first end plate of FIG. 15;

[0072] FIG. 17 is a cross-sectional view of a filter cartridge using the hydrophobic screen assembly of FIG. 15;

[0073] FIG. 18 is a cross-sectional view of an embodiment of a hydrophobic screen assembly useable in a coalescer filter cartridge, constructed in accordance with principles of this disclosure;

[0074] FIG. 19 is an exploded view of the hydrophobic screen assembly of FIG. 18 and a first end plate;

[0075] FIG. 20 is a cross-sectional view of a filter cartridge using the hydrophobic screen assembly of FIG. 18;

[0076] FIG. 21 is a cross-sectional view of another embodiment of a filter cartridge having a hydrophobic screen assembly, constructed in accordance with principles of this disclosure;

[0077] FIG. 22 is a side elevational view the hydrophobic screen assembly in the filter cartridge of FIG. 21; and

[0078] FIG. 23 is a perspective view of the hydrophobic screen assembly of FIG. 22, but without the screen media to show the internal components.Detailed Description

[0079] FIG. 1 illustrates a filter system 20, in an exploded view, constructed in accordance with principles of this disclosure. The filter system 20 can be used to filter fluids, such as fuel or hydraulic fluids. The filter system 20 includes a filter cartridge 22, a filter housing or bowl 24, and a filter head 26. The filter cartridge 22 is removable and replaceable within the filter bowl 24. The filter bowl 24 is removable and attachable to the filter head 26 through conventional means, such as by a threaded connection. An axial seal member 74 forms a seal with the filter head 26, separating the unfiltered fluid from the filtered fluid. Another seal member 27 forms an outer seal between the filter head 26 and the filter bowl 24. In general, the filter cartridge 22 is oriented within the filter bowl 24, and then the bowl 24 (containing the cartridge 22) is threaded onto the filter head 26. The filter head 26 is in communication with equipment that use the fluid being filtered. Unfiltered fluid reaches the filter head 26, then passes through the filter cartridge 22, and then the filtered fluid is directed back through the filter head 26 and to downstream equipment.

[0080] The filter system 20 is a “no filter no run” system. That is, if the filter bowl 24 is attached to the filter head 26, but there is no filter cartridge in the bowl 24, the system 20 is disabled from operating. In addition, if there is a filter cartridge in the bowl 24, but it is a cartridge that is not correct for the system 20, the system 20 is disabled from operating. FIG. 2 is a“no filter no run system.”

[0081] In FIG. 2, the filter cartridge 22 has a geometric projection or pin 42. The geometric projection 42 engages an opening of a flow restriction valve 36 attached to the filter head 26. The flow restriction valve 36 includes a valve body 51 , a valve support 512, and a valve ball 40 that is configured to restrict fluid flow through the valve when no filter cartridge 22 or an incorrect filter cartridge is installed. The geometric projection 42 engages the opening of the valve 36 such that the ball 40 is prevented from blocking the flow of fluid when a designated filter cartridge is installed in the filter housing. FIG. 2 depicts the geometric projection 42 of filter cartridge 500 overlaid on the position of the ball 514 when restricting fluid flow through the valve 36, showing that the geometric projection 42 physically prevents the ball 40 from restricting fluid flow out of the filter system when thefilter cartridge 22 is present.

[0082] In both of FIGS. 2 and FIG. 3, the filter head 26 of the filter system 20 of FIGS. 1 and 2 is shown schematically. The filter head 26 includes an outer wall 28. Along an inside surface of the outer wall 28 are threads 30 for releasably attaching the filter head 26 to the bowl 24. An inner wall 32 is perpendicular to the outer wall 28 and contained within the outer wall 28. The head has an inlet 200 and an outlet 202. The flow7restriction valve 36 can be seen, centered in the outer wall 28 and spaced from the inner wall 32. The flow7restriction valve 36 includes an inlet port 38 and valve opening 204. The valve opening 204 is blocked by a ball 40, which can be moved from the blocking position to an unblocking position.

[0083] Fluid to be filtered enters the filter head 26 at head inlet 200 from a fluid source. From the filter head 26, the fluid flows into the bowl 24 around the outside of the cartridge 22. The fluid is filtered by flowing through the cartridge 22. From a clean side of the cartridge 22, the filtered fluid flows back into the filter head 26 by flowing through the inlet port 38, provided that the ball 40 is in its unblocking position of the valve opening 204. The ball 40 will be in the unblocking position if pin 42 extends into the inlet port 38 and moves the ball 40 from the blocking position to the unblocking position.

[0084] In reference now7to FIGS. 4 and 5, an example embodiment of filter cartridge 22 is illustrated. The cartridge 22 has a section of filter media 44. The filter media 44 can be a variety of forms, and preferably will be pleated media 46 in a tubular, e.g. a cylindrical, shape. The cylindrically shaped media 44 has an inner cavity 48. Typically, when installed in the filter system 20, the inner cavity 48 will be the downstream, clean (or filtered) side of the media 44.

[0085] The filter media 44 has a first end 50, and an opposite second end 52. A central longitudinal axis 49 extends through the cylinder, between the first and second ends 50, 52.

[0086] At the first end 50 is a first end plate 54. The media 44 is secured (sealed) to the first end plate 54. Similarly, at the second end 52 is a second end plate 56. The media 44 is secured (sealed) to the second end plate 56. As such, the filter media 44 extends a complete length betw een the first end plate 54 and second end plate 56.

[0087] The first end plate 54 includes two or more projections 58 defining a support plane 60. In the example shown in FIG. 4, there are at least three projections 58, andpreferably four projections 58, evenly circumferentially spaced from each other. The projections 58 extend radially from a remaining radial edge 62 of the first end plate 54. Centered within the first end plate 54 is an opening 64. The opening 64 receives flow restriction valve 36 (FIG. 3), which is part of the filter head 26. For illustrative purposes, FIGS. 10-12 show a portion 66 of the flow restriction valve 36 within the opening 64. The flow restriction valve 66 includes the inlet port 38, which includes a valve center hole 68 or a pin-receiving opening to receives the pm 42, described further below. The valve center hole 68 will typically be round (circular).

[0088] Circumscribing the opening 64 in the first end plate 54 is an axially projecting lip 70. The lip 70 projects axially from a remaining part 72 of the first end plate 54. Axial seal member 74 circumscribes and is against the lip 70. The seal member 74 forms a seal with the filter head 26, when the cartridge 22 and bowl 24 are secured to the filter head 26.

[0089] The second end plate 56 is depicted as closed, without openings. A closed center 76 of the second end plate 56 projects inwardly into the cavity 48 of the media 44. The first and second end plates 54, 56 can be made from nylon, plastics, or may be metal.

[0090] The filter cartridge 22 includes a perforated inner liner 80. The inner liner 80 is within the inner cavity 48 of the media 44. The inner liner 80 has an open end 82 adjacent to the first end 50 of the filter media 44. The open end 82 is within a plane generally perpendicular to the longitudinal axis 49. The inner liner 80 supports the filter media 44. The perforations 81 in the liner 80 allow fluid that has been filtered to enter into the inner cavity 48. The inner liner 80 extends a complete distance between the first end 50 of the filter media 44 and the second end 52 of the filter media 44.

[0091] As mentioned above, the filter cartridge 22 has pin 42. The pin 42 projects from the inner cavity 48 and has a free end 84 extending beyond the first end 50 of the filter media 44. The pin 42 is free of attachment to the first end plate 54 and second end plate 56. The pin 42 is in the inner cavity 48 and is oriented orthogonal to the support plane 60. Preferably, the free end 84 of the pin 42 traverses the plane containing the open end 82 of the inner liner 80. See FIG. 11, in which the broken line 94 is along the plane containing the open end 82, and the broken line 96 is even with the free end 84 of the pin 42.

[0092] Still in reference to FIG. 11, the axial seal member 74 has an axial end surface 84, defining a sealing plane. See the broken line 98, which is along the sealing plane. The free end 84 of the projecting pin 42 does not project beyond the sealing plane of the axial sealmember 74. Preferably, the pin 42 is solid and free of openings or open passageways.

[0093] In reference now to FIG. 7, in preferred implementations, the pin 42 is integral with the inner liner 80. By ‘"integral”, it is meant that the pin 42 is permanently part of / nonremovable. from a remaining part of the inner liner 80. It may be the same molded piece as the rest of the inner liner 80. The inner liner 80 is cylindrical in shape, and the pin 42 is located centered w ithin the cylinder, at the open end 82 of the liner 80. As can be seen in FIG. 4, the pin 42 is supported by a central hub 89, which is connected to the rest of the inner liner 80 by radial spokes 88.

[0094] Attention is directed to FIGS. 8, 9, 12, and 13. The pin 42 has a shape designed to allow improved (more) flow of fluid (e.g., fuel) around the pin 42, as compared to the prior art. In general, the pin 42 has a non-round cross-sectional shape. When the valve hole 68 is circular, having a non-circular shape to the pin 42 can result in more flow through the valve hole 68.

[0095] The pin 42 has a cross-sectional shape including a plurality of lobes 90. There can be three lobes 90, as shown in FIG. 9, or more or fewer lobes 90. The cross-section of the pin 42 further includes a plurality of curved sections 92. which alternate with the lobes 90. This shape of the pin 42 provides for strength for the pin 42, while also providing ample open area in the valve hole 68, when the pin 42 is within the valve hole 68. For example, there is at least 20% open area, and often at least 50 %, or 60% open area of the valve hole 68, when the pin 42 in within the hole 68. This is an improvement over the prior art.

[0096] FIG. 14 illustrates an alternate embodiment of filter cartridge 22. Common reference numerals are used for common features. In this embodiment, the first end plate 54 includes an axially extending neck or spigot 102. Mounted on the first end plate 54 is seal member in the form of an o-ring, or radially extending seal member 104. The radial seal member 104 surrounds the spigot 102. to be an external, or radially outwardly directed radial seal member 104. The pin 42 is integral with the inner liner 80, having free end 84 that extends past a planar portion 106 of the first end plate 54, but not extend past a free end 108 of the spigot 102. The radially extending seal member 104 has an axial end surface 105, defining a sealing plane. See the broken line 107, which is along the sealing plane. The free end 84 of the projecting pin 42 does not project beyond the sealing plane 107 of the seal member 104.

[0097] Attention is directed to FIGS. 15-20. which show embodiments of a coalescerfilter cartridge 120. The coalescer filter cartridge 120 has many of the same features, as described above, and use the same reference numbers. The description of these common features is not again repeated here.

[0098] FIGS. 17 and 20 show cross-sections of two embodiments of coalescer filter cartridge 120. The coalescer filter cartridge 120 includes filter media 44 in a cylindrical form, defining inner cavity 48. The filter media 44 is ty pically pleated, and has opposite first and second ends 50, 52. First end plate 54 is secured to the first end 50, while second end plate 56 is secured to the second end 52.

[0099] In these embodiments, the second end plate 56 defines an opening 122, in communication with the inner cavity 48. The second end plate 56 has an axially extending seal holder 124. A radial seal member 126 is held by the seal holder 124 and is outwardly directed.

[0100] The first end plate 54 has axially extending tube or spigot 102. Radial seal member 104 is mounted around an external surface of the spigot 102 to form an outwardly- directed radial seal member 104.

[0101] Positioned within the inner cavity- 48 is a hydrophobic screen assembly 130. The hydrophobic screen assembly 130 has a first screen end 132 and an opposite second screen end 134. The first screen end 132 is located at the first end plate 54.

[0102] The hydrophobic screen assembly 130 is conically shaped, wherein the first screen end 132 is larger than the second screen end 134. The hydrophobic screen assembly 130 includes a plurality of support bars 136 extending between the first screen end 132 and second screen end 134. Screen media 138 extends between the first screen end 132 and second screen end 134 and is supported by the support bars 136.

[0103] The coalescer filter cartridge 120 includes a pin assembly 139, including a pin plate 140. The pin assembly 139 has projecting pin 42 with free end 84. The free end 84 extends beyond the first end 50 of the filter media 44. The pin plate 140 is secured to the first screen end 132 of the hydrophobic screen assembly 130. The pin 42 projects axially from a center of the pin plate 140.

[0104] The pin 42 can be used to unblock a flow restriction valve 66 in a filter head 26, as described above.

[0105] In the embodiment of FIGS. 15-17, the pin plate 140 further includes an outersurrounding wall 142, axially extending from the plate 140 and surrounding the pin 42 to form a cup 144. In FIG. 16, it can be seen how the free end 84 of the pin 42 extends beyond an end rim 146 of the surrounding wall 142.

[0106] In the embodiment of FIGS. 15-17, the cup 144 is a separate component, which is then potted to the opening 148 in the first end plate 54. During the same assembly operation, the hydrophobic screen assembly 130 is potted over the cup 144 to the first end plate 54. By “potted”, it is meant non-removably attached thereto using a potting compound, which bonds the components together. Typical potting compounds can include a variety of adhesives.

[0107] In the embodiment of FIGS. 18-20, the pin plate 140 is a separate component, which is snap fit or press fit into a recess 150 of the hydrophobic screen assembly 130. The hydrophobic screen assembly 130 is then potted to the opening 148 in the first end plate 54.

[0108] The pin 42 is free of attachment to the first end plate 54 and second end plate 56. The first end plate 54 has two or more projections defining a support plane 61 (FIG. 15). The pin 42 is in the inner cavity 48 and is oriented orthogonal to the support plane 61. Preferably, the free end 84 of the pin 42 traverses the support plane 61.

[0109] FIGS. 21-23 show another embodiment of a coalescer filter cartridge 120.The coalescer filter cartridge 120 has many of the same features, as described above, and use the same reference numbers. The description of these common features is not again repeated here.

[0110] The coalescer filter cartridge 120 includes filter media 44 in a cylindrical form, defining inner cavity 48. The filter media 44 is typically pleated, and has opposite first and second ends 50, 52. First end plate 54 is secured to the first end 50, while second end plate 56 is secured to the second end 52.

[0111] The second end plate 56 defines opening 122, in communication with the inner cavity 48. The second end plate 56 has axially extending seal holder 124 holding radial seal member 126.

[0112] The first end plate 54 has axially extending tube or spigot 102. Radial seal member 104 is mounted around the external surface of the spigot 102 to form outwardly directed radial seal member 104.

[0113] Positioned within the inner cavity' 48 is a hydrophobic screen assembly 230.The hydrophobic screen assembly 230 has a first screen end 232 and an opposite second screen end 234. The first screen end 232 is located at the first end plate 54.

[0114] The hydrophobic screen assembly 230 is conically shaped, wherein the first screen end 232 is larger than the second screen end 234. The hydrophobic screen assembly 230 includes a plurality of support bars 236 extending between the first screen end 232 and second screen end 234. Screen media 238 extends between the first screen end 232 and second screen end 234 and is supported by the support bars 236.

[0115] The coalescer filter cartridge 220 includes a pin assembly 239. The pin assembly 139 has projecting pin 42 with free end 84 The free end 84 extends beyond the first end 50 of the filter media 44. As can be seen in FIG. 23. ribs 240 extend from the support bars 236 radially inwardly to a hub 242. The pin 42 projects axially from the hub 242 and from a center of the screen assembly 230. The pin assembly 239, including the pin 42, is a same molded part as the support bars 236 and ribs 240 and hub 242 of the screen assembly 230.

[0116] The pin 42 can be used to unblock a flow restriction valve 66 in a filter head 26. as described above.

[0117] The above can be used in a method for installing a filter cartridge into a filter system. The method includes providing the filter cartridge 22 having projecting pin 42, and positioning the filter cartridge 22 in the filter bowl 24. Next, the filter head 26 is oriented onto the filter bowl 24. This can be done by threading the filter head 26 onto the bowl 24. The filter head 26 has valve 66 with pin-receiving opening 68. The opening 68 has a first cross-sectional shape, such as circular. The method includes passing the pin 42 through the pin-receiving opening 68 in the valve 66. The pin 42 has a second cross-sectional shape, which is different from the first cross-sectional shape of the opening 68. This step can include while threading, axially translating the pin 42 through the pin-receiving opening 68 in the valve 66.

[0118] The above represents example principles. Many embodiments can be made using these principles.

Claims

What is claimed is:1 . A filter cartridge comprising:(a) filter media having an inner cavity, a first end, and an opposite second end;(b) an inner liner within the inner cavity;(c) a first end plate secured to the first end of the filter media;(d) a second end plate secured to the second end of the filter media; and(e) a projecting pin projecting from the inner cavity and having a free end extending beyond the first end of the filter media; the pin being free of attachment to the first end plate and second end plate; and wherein the pin is integral with the inner liner.

2. A filter cartridge comprising:(a) filter media having an inner cavity, a first end, and an opposite second end;(b) an inner liner within the inner cavity;(c) a first end plate secured to the first end of the filter media;(i) the first end plate having two or more projections defining a support plane;(d) a second end plate secured to the second end of the filter media; and(e) at least one projecting pin in the inner cavity oriented orthogonal to the support plane; and wherein the pin is integral with the inner liner.

3. A filter cartridge comprising:(a) filter media having an inner cavity, a first end, and an opposite second end;(b) an inner liner within the inner cavity;(i) the inner liner having an open end adj acent to the first end of the filter media; the open end being within a plane; and(c) a projecting pin projecting from the inner cavity and having a free end traversing the plane containing the open end of the inner liner; and wherein the pin is integral with the inner liner.

4. A filter cartridge comprising:(a) filter media having an inner cavity, a first end, and an opposite second end;(b) an inner liner within the inner cavity;(c) a first end plate secured to the first end of the filter media;(i) the first end plate defining a first end plane;(d) a second end plate secured to the second end of the filter media; and(e) a projecting pin projecting from the inner cavity and having a free end extending beyond the first end plane; and wherein the pin is integral with the inner liner.

5. The filter cartridge of any one of claims 1, 2, and 4, further including a seal member mounted on the first end plate.

6. The filter cartridge of claim 5, wherein the seal member comprises an axial seal member defining a sealing plane; and wherein the free end of the projecting pin does not project beyond the sealing plane.

7. The filter cartridge of claim 5, wherein the first end plate includes an axially extending spigot; and wherein the seal member comprises a radial seal member mounted on the spigot; the radial seal member defining a sealing plane, and wherein the free end of the projecting pin does not project beyond the sealing plane.

8. The filter cartridge of claim 7, wherein the radial seal member is an outwardly directed radial seal member.

9. The filter cartridge of any one of claims 1-8. wherein the pin is solid and free of open passageways.

10. The filter cartridge of any one of claims 1 -9, wherein the pin has a non-round cross- sectional shape.

11. The filter cartridge of any one of claims 1-10, wherein the pin has a cross-sectional shape including a plurality of lobes.

12. The filter cartridge of any one of claims 1-11, wherein the pin has a cross-sectional shape including a plurality of lobes and a plurality of curved sections.

13. The filter cartridge of any one of claims 1-12, wherein the filter media is pleated media, having a cylindrical shape.

14. The filter cartridge of claim 3, further including:(a) a first end plate secured to the first end of the filter media; and(b) a second end plate secured to the second end of the filter media.

15. The filter cartridge of claim 14, wherein the filter media is pleated media.

16. The filter cartridge of claim 14, further including a seal member mounted on the first end plate.

17. The filter cartridge of claim 16, wherein the seal member comprises an axial seal member defining a sealing plane; and wherein the free end of the projecting pin does not project beyond the sealing plane.

18. The filter cartridge of claim 15, wherein the first end plate includes an axially extending spigot; and wherein the seal member comprises a radial seal member mounted on the spigot; the radial seal member defining a sealing plane, and wherein the free end of the projecting pin does not project beyond the sealing plane.

19. The filter cartridge of claim 18, wherein the radial seal member is an outwardly directed radial seal member.

20. The filter cartridge of any one of claims 1, 4, and 14, wherein the first end plate has at least two projections defining a support plane.

21. The filter cartridge of any one of claims 2 or claim 20, wherein the at least two projections are radial projections.

22. The filter cartridge of any one of claims 2 or 20. wherein the first end plate has four projections defining the support plane.

23. The filter cartridge of any one of claims 2 or 20-22, wherein the free end of the projecting pin extends beyond the support plane.

24. The filter cartridge of any one of claims 1-23, wherein the inner liner extends a complete distance between the first end of the filter media and the second end of the filter media.

25. The filter cartridge of any one of claims 1, 4 and 14 wherein:(a) the first end plate has two or more projections defining a support plane; and(b) the at least one projecting pin is oriented orthogonal to the support plane.

26. The filter cartridge of claim 1, wherein:(a) the first end plate defines a first end plane; and(b) the free end of the projecting pin extends beyond the first end plane; or(c) the filter cartridge in combination with any other claim.

27. The filter cartridge of any one of claims 1, 2, and 4 wherein:(a) the inner liner has an open end adjacent to the first end of the filter media; the open end being within a plane; and(b) the free end of the projecting pin traversing the plane containing the open end of the inner liner.

28. The filter cartridge of claim 2, wherein:(a) the first end plate defines a first end plane; and(b) the free end of the pin extends beyond the first end plane.

29. The filter cartridge of claim 2, in combination with any other claim.

30. The filter cartridge of claim 3, wherein:(a) a first end plate secured to the first end of the filter media;(i) the first end plate defining a first end plane;(b) a second end plate secured to the second end of the filter media; and(c) the free end of the projecting pin extending beyond the first end plane.

31. The filter cartridge of claim 3, in combination with any other claim.

32. The filter cartridge of claim 4, in combination with any other claim.

33. A filter cartridge comprising:(a) filter media having an inner cavity, a first end. and an opposite second end;(b) a first end plate secured to the first end of the filter media;(c) a second end plate secured to the second end of the filter media;(d) a hydrophobic screen assembly within the inner cavity; the hydrophobic screen assembly having a first screen end and a second screen end; and(e) a pin assembly having a projecting pin having a free end extending beyond the first end of the filter media; the pin assembly being at the first screen end.

34. A filter cartridge comprising:(a) filter media having an inner cavity, a first end. and an opposite second end;(b) a first end plate secured to the first end of the filter media;(i) the first end plate having two or more projections defining a support plane:(c) a second end plate secured to the second end of the filter media;(d) a hydrophobic screen assembly within the inner cavity; the hydrophobic screen assembly having a first screen end and a second screen end; and(e) a pin assembly having at least one projecting pin in the inner cavity oriented orthogonal to the support plane, the pin assembly being at the first screen end.

35. A filter cartridge comprising:(a) filter media having an inner cavity, a first end, and an opposite second end;(b) a hydrophobic screen assembly within the inner cavity; the hydrophobic screen assembly having a first screen end and a second screen end;(i) the first screen end being end being an open end; the open end being within a plane;(c) a pin assembly having a projecting pin having a free end traversing the plane containing the open end; the pin assembly being at the first screen end.

36. A filter cartridge comprising:(a) filter media having an inner cavity, a first end, and an opposite second end;(b) a first end plate secured to the first end of the filter media;(i) the first end plate defining a first end plane;(c) a second end plate secured to the second end of the filter media;(d) a hydrophobic screen assembly within the inner cavity; the hydrophobic screen assembly having a first screen end and a second screen end; and(e) a pin assembly having a projecting pin having a free end extending beyond the first end plane; the pin assembly being at the first screen end.

37. The filter cartridge of any one of claims 33, 34, and 36 wherein the pin assembly includes a surrounding wall to form a cup; the cup and the hydrophobic screen assembly being potted to the first end plate.

38. The filter cartridge of any one of claims 33, 34, 36, and 37 wherein the pin assembly includes a pin plate snap fit to the hydrophobic screen assembly, and the hydrophobic screen assembly is potted to the first end plate.

39. The filter cartridge of any one of claims 33, 34, and 36-38, wherein the pin assembly includes a pin plate press fit to the hydrophobic screen assembly, and the hydrophobic screen assembly is potted to the first end plate.

40. The filter cartridge of any one of claims 33-39, wherein the hydrophobic screen assembly is conically shaped, wherein the first screen end is larger than the second screen end.

41. The filter cartridge of any one of claims 33, 34, and 36 further including a seal member, wherein the first end plate includes an axially extending spigot; and wherein the seal member comprises a radial seal member mounted on the spigot.

42. The filter cartridge of claim 35, further including a seal member and a first end plate secured to the first end of the filter media; wherein the first end plate includes an axially extending spigot; and wherein the seal member comprises a radialseal member mounted on the spigot.

43. The filter cartridge of any one of claims 33-39, further including a seal member, wherein the seal member comprises an axial seal member defining a sealing plane; and wherein the free end of the projecting pin does not project beyond the sealing plane.

44. The filter cartridge of any one of claims 33-42, wherein the pin is solid and free of open passageways.

45. The filter cartridge of any one of claims 33-43, wherein the pin has a non-round cross- sectional shape, and / or the pin has a cross-sectional shape including a plurality of lobes.

46. The filter cartridge of any one of claims 33-45, wherein the pin has a cross-sectional shape including a plurality of lobes and a plurality of curved sections.

47. The filter cartridge of any one of claims 33-46, wherein the filter media is pleated media, having a cylindrical shape.

48. The filter cartridge of any one of claims 33, 36, 41 and 42, wherein:(a) the first end plate has two or more projections defining a support plane; and(b) the at least one projecting pin is oriented orthogonal to the support plane.

49. The filter cartridge of any one of claims 33, 36, 41, 42, and 48, wherein:(a) the first end plate has two or more projections defining a support plane; and(b) the free end of the projecting pin extends beyond the support plane.

50. The filter cartridge of any one of claims 33-49 wherein the pin assembly includes a pin plate that is a separate component non-removably attached to the screen assembly.

51. The filter cartridge of any one of claims 33-49 wherein the pin assembly is a same molded piece with the screen assembly.

52. The filter cartridge of any one of claims 33-36 in combination with any other claim.

53. A filter system comprising:(a) a filter bowl with an interior and an open mouth providing access to the interior;(b) a filter cartridge removably positionable within the interior of the bowl;(c) a filter head removably mounted over the mouth of the bowl;(d) a flow restriction valve held by the filter head; the flow restriction valve having a pin-receiving opening; the opening having a first cross-sectional shape; and(e) a pin secured to the filter cartridge; the pin having a second cross-sectional shape, which is different from the first cross-sectional shape, and is configured to promote fluid flow around the pin when the filter cartridge is operably installed in the filter bowl.

54. The filter system of claim 53, wherein the filter cartridge comprises any one of claims1-5255. A method for installing a filter cartridge into a filter system; the method comprising:(a) providing a filter cartridge having a projecting pin;(b) positioning the filter cartridge in a filter bowl;(c) orienting a filter head onto the filter bowl; the filter head having a valve with a pin-receiving opening; the opening having a first cross-sectional shape; and(d) passing the pin through the pin-receiving opening in the valve; the pin having a second cross-sectional shape, which is different from the first cross-sectional shape.

56. A method for installing a filter cartridge into a filter system; the method comprising:(a) providing a filter cartridge including filter media having an inner cavity, a first end, and an opposite second end; an inner liner within the inner cavity; and a projecting pin integral with the inner liner;(b) positioning the filter cartridge in a filter bowl;(c) threading a filter head onto the filter bowl; the filter head having a valve witha pin-receiving opening; and(d) while threading, axially translating the pin through the pin-receiving opening in the valve.

57. The method of claim 55, wherein the filter cartridge comprises any one of claims 1-52.

58. The method of claim 56, wherein the filter cartridge comprises any one of claims 1-32.

59. A method for installing a filter cartridge into a filter system; the method comprising:(a) providing a filter cartridge including filter media having an inner cavity, a first end, and an opposite second end; a hydrophobic screen assembly within the inner cavity; the hydrophobic screen assembly having a first screen end and a second screen end; and a pin assembly having a projecting pin having a free end extending beyond the first end of the filter media; the pin assembly being at the first screen end;(b) positioning the filter cartridge in a filter bowl;(c) threading a filter head onto the filter bowl; the filter head having a valve with a pin-receiving opening; and(d) while threading, axially translating the pin through the pin-receiving opening in the valve.

60. The method of claim 59, wherein the step of providing a filter cartridge includes the pin assembly includes a pin plate which is a separate component non- removably attached to the screen assembly.

61. The method of claim 59, wherein the step of providing a filter cartridge includes the pin assembly being a same molded piece with the screen assembly.

62. The method of any one of claims 59-61, wherein the step of providing a filter cartridge includes a first end plate secured to the first end of the filter media; the first end plate having two or more projections defining a support plane; and wherein the projecting pin is oriented orthogonal to the support plane.

63. The method of any one of claims 59-61, wherein the step of providing a filter cartridge includes the first screen end being end being an open end; the open end being within a plane; and wherein the free end of the projecting pin traverses the plane containing the open end.

64. The method of any one of claims 59-61. wherein the step of providing a filter cartridge includes a first end plate secured to the first end of the filter media; the first end plate defining a first end plane; and wherein the free end of the pin extends beyond the first end plane.

65. The method of any one of claims 59-61, wherein the step of providing a filter cartridge includes a first end plate secured to the first end of the filter media; the first end plate having two or more projections defining a support plane; and wherein the free end of the projecting pin extends beyond the support plane.

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