Filter cartridges, filter assemblies and methods

Abstract

A filter cartridge includes a tubular core movably oriented in a liner and having a projection with a fluid passage. The core is free floating and movable between a first position in which the core can be moved along a longitudinal axis of the core and a sealed position in which the core is sealed to the liner of the filter cartridge. In the sealed position, the fluid passage through the projection can provide an air flow passage from an air cavity in the filter cartridge to an exterior of the filter cartridge. Other structures include a filter cartridge having a free floating core that forms a fuel bypass between the core and a standpipe.

Description

[0001] This application claims priority to U.S. Provisional Patent Application No. 63 / 081,048, filed on September 21, 2020. Technical Field

[0002] This invention relates to filtration, for example, filtration in a fuel filter assembly. The invention also relates to the resulting assembly and its method of use. Background Technology

[0003] Some filter components are designed to prevent filtered components (such as fuel) from flowing to the engine if the filter element is not installed correctly in the system.

[0004] We hope to improve the filter cartridges and the system. Summary of the Invention

[0005] In one aspect, a filter element is provided, comprising: a first filter media configuration defining an internal space and having a first end and a second end; a first end plate connected to the first end; a second end plate connected to the second end; a liner extending between the first end and the second end and lining the internal space of the first filter media configuration; a tubular core in the liner and including opposing first and second ends, wherein sidewalls of the second filter media configuration extend therebetween; and wherein when the filter element is mounted on a riser, a fuel bypass is formed between the second end of the tubular core and the riser.

[0006] In one or more embodiments:

[0007] - The second filter medium is constructed to include a hydrophobic medium; or

[0008] - The sidewalls of the tubular core are tapered, with the second end being larger in diameter than the first end; or

[0009] - The draft angle of the sidewalls of the tubular core is between 0.25 and 3 degrees; or

[0010] - The tubular core has a protrusion that is formed as a single piece with the core; the protrusion defines a fluid passage therethrough;

[0011] - The tubular core is movably oriented within the liner, and the tubular core floats freely from a first position in which it can move along its longitudinal axis, and the tubular core has a sealed position in which it is sealed to the liner; or

[0012] - The tubular core includes a seal that forms a seal with the liner; or

[0013] - The seal is a seal that is oriented radially outward.

[0014] Example embodiments also include:

[0015] - An inner plate, spaced apart from each of the first and second end plates, extends along a plane perpendicular to the central longitudinal axis of the liner; the inner plate has an opening; the liner is non-perforated between the first end plate and the inner plate and defines an inner cavity configured to accommodate air; or

[0016] - A gasket, said gasket being located at the second end of the first filter media configuration.

[0017] In some embodiments:

[0018] - The second end plate has a washer support extending axially away from the rest of the filter element, and the washer is located in a groove in the washer support; or

[0019] - The gasket is oriented radially inward; or

[0020] - The first end plate has an air vent; or

[0021] - The liner includes a first portion having a first inner diameter adjacent to a second end plate, and a second portion having a second inner diameter smaller than the first inner diameter; the second portion is axially spaced from the second end plate, with the first portion therebetween.

[0022] In one or more embodiments:

[0023] - The tubular core includes a radial flange adjacent to a second end of the core; the flange having an outer diameter: (i) smaller than a first inner diameter of a first portion of the liner; and (ii) larger than a second inner diameter of a second portion of the liner; and wherein the tubular core is axially and radially movable within the liner and its movement is restricted by a flange engaging against a second end plate or a second portion of the liner; or

[0024] - The second end plate includes a radial seal; or

[0025] - Radial seals are oriented outwards.

[0026] Some example embodiments also include a perforated outer wrapping layer covering the first filter medium and extending from the first end plate to the second end plate.

[0027] In some embodiments:

[0028] - The perforated outer winding layer includes: a solid, non-perforated portion extending from the first end plate for at least 25% of the length of the filter element; and a perforated portion extending from the non-perforated portion to the second end plate; or

[0029] - The first end plate includes a burp valve device; or

[0030] - The tubular core and the rest of the filter element are independent and separable.

[0031] In other configurations, a combination of a filter housing and a filter element characterized in various ways above is provided, comprising: a filter housing having a housing body having side walls and end walls defining a filter element space; a riser extending from the end walls along a longitudinal axis into the filter element space, the riser including an airflow passage, and at least one opening in the riser communicating with the airflow passage and the filter element space; and a filter element configured to be disposed within the filter element space; wherein engagement of a protruding portion with at least one opening in the riser provides an airflow passage to the outside of the filter element.

[0032] In another aspect, a filter element is provided, comprising: a first filter media configuration defining an internal space and having a first end and a second end; a first end plate connected to the first end; a second end plate connected to the second end; a liner extending between the first end and the second end and lining the internal space of the first filter media configuration; an inner plate spaced apart from each of the first and second end plates and extending along a plane perpendicular to the central longitudinal axis of the liner; the inner plate having an opening; the liner being non-porous between the first end plate and the inner plate and defining an internal cavity configured to contain air; a tubular core movably oriented in the liner and having a protrusion; the core being movably oriented along a longitudinal axis between the second end plate and the inner plate; the protrusion defining a fluid passage therethrough; the core being free to float and movable from a first position in which the core can move along the longitudinal axis of the core, and a sealed position in which the core is sealed to the liner; and wherein in the sealed position, the fluid passage of the protrusion provides an airflow passage for air in the internal cavity to the outside of the filter element.

[0033] In one or more embodiments:

[0034] -The tubular core includes a second filter media configuration; or

[0035] - The second filter medium is constructed to include a hydrophobic medium; or

[0036] - The tubular core includes a seal that forms a seal with the liner; or

[0037] - The seal is a seal that is oriented radially outward.

[0038] In the example embodiment, the tubular core has a first end and a second end opposite to each other; the first end of the core has a protrusion that extends from the first end and into the interior of the core; while the second end of the core is an open end.

[0039] In the example:

[0040] - The seal is an outwardly radially oriented seal that surrounds the first end of the core; or

[0041] - The tubular core includes sidewalls extending between a first end and a second end of the core; the sidewalls have a greater taper at the second end of the core than at the first end; or

[0042] - Fuel bypass: When the filter element is installed on the riser, a fuel bypass is formed between the second end of the element and the riser; or

[0043] - It also includes a gasket located at the second end of the first filter media configuration.

[0044] In some embodiments:

[0045] - The second end plate has a gasket support extending axially away from the rest of the filter element, and the gasket is disposed in a groove in the gasket support; or

[0046] - The gasket is oriented radially inward; or

[0047] - The first end plate has an air vent; or

[0048] - The protrusion and the core are formed as a single piece.

[0049] On the other hand, a combination of a filter housing and a filter element characterized in different ways above is provided, comprising: a filter housing having a housing body having side walls and end walls defining a filter element space; a riser extending from the end walls along a longitudinal axis into the filter element space; the riser including an airflow passage, and at least one opening in the riser communicating with the airflow passage and the filter element space; and a filter element disposed in the filter element space; wherein engagement of a protrusion with at least one opening in the riser provides an airflow passage to the outside of the filter element.

[0050] On another front, a method for mounting a filter element in a filter assembly is provided, comprising: providing a filter housing having a housing body having side walls and end walls defining a filter element space; a riser extending longitudinally from the end walls into the filter element space, the riser including an airflow passage and at least one opening in the riser communicating with the filter element space; providing a filter element as characterized in different ways above; placing the filter element on the riser and into the filter element space; moving the element from a first position to a sealed position; and aligning a fluid passage through a protrusion with a hole in an inner plate and engaging the protrusion with at least one opening in the riser to provide an airflow passage for air in the inner cavity of the filter element to the outside of the filter element.

[0051] The method may also include forming a seal between the gasket on the filter element and the riser.

[0052] On the other hand, a method of filtering fuel includes providing a filter element as characterized above, mounted on a riser in a filter housing; and allowing some fuel to bypass the tubular element between a second end of the element and the riser.

[0053] In another aspect, a method for installing a filter element into a filter assembly is provided, comprising: providing a filter housing having a housing body having side walls and end walls defining a filter element space; a riser extending from the end walls into the filter element space; providing a filter element as characterized in different ways above; the filter element having a central longitudinal axis; and placing the filter element on the riser and into the filter element space, moving a tubular core on the riser to an off-axis position, not collinear with the central longitudinal axis of the filter element.

[0054] In the example method:

[0055] - The tubular core includes a radial flange adjacent to a second end of the core; and the step of setting the filter element includes moving the tubular core until the radial flange engages against the liner; or

[0056] - The steps for setting the filter element on the riser include: first, setting the tubular core on the riser; and second, setting a filter element independent of the tubular core on the tubular core and on the riser.

[0057] On the other hand, a kit is provided comprising: a filter element including a first filter media configuration defining an internal space and having a first end and a second end; a first end plate connected to the first end; a second end plate connected to the second end; and a liner extending between the first end and the second end and lining the internal space of the first filter media configuration; and a tubular core sized to fit within the liner and including opposing first and second ends, wherein sidewalls of the second filter media configuration extend therebetween.

[0058] It should be noted that not all of the specific features described herein need to be incorporated into the device / structure in order to give the device / structure some of the selected advantages of the invention. Attached Figure Description

[0059] Figure 1 It is a schematic cross-sectional view showing the prior art filter housing and riser, and illustrating the fluid flow path through them;

[0060] Figure 2 It is used for Figure 1 A schematic cross-sectional view of the prior art valve assembly of the riser;

[0061] Figure 3 It is used for Figure 1Another schematic cross-sectional view of the valve assembly of the riser;

[0062] Figure 4 It is used for Figure 1 Another schematic cross-sectional view of the valve assembly of the riser;

[0063] Figure 5 It is used for Figure 1 Another schematic cross-sectional view of the valve assembly of the riser;

[0064] Figure 6 This is a schematic diagram of a filter system constructed according to the principles of this invention;

[0065] Figure 7 It is constructed according to the principle of the present invention and can be used Figure 6 A cross-sectional view of an embodiment of a filter element in a system;

[0066] Figure 8 yes Figure 7 Exploded perspective view of the filter element;

[0067] Figure 9 It is constructed according to the principle of this invention and is compatible with Figure 6 A cross-sectional view of another embodiment of a filter element used in a filter system;

[0068] Figure 10 yes Figure 9 Exploded perspective view of the filter element;

[0069] Figure 11 yes Figure 9 A schematic cross-sectional view of the filter element;

[0070] Figure 12 This is a schematic cross-sectional view showing that... Figure 11 The filter cartridge is placed in the riser (e.g. Figure 1 A step on the riser shown in the diagram;

[0071] Figure 13 This is a schematic cross-sectional view showing that... Figure 11 The filter cartridge is placed in the riser (e.g. Figure 1 The final step on the riser shown in the image;

[0072] Figure 14 yes Figure 11 A close-up view of a portion of the filter element;

[0073] Figure 15 This is a cross-sectional view of another embodiment of a filter element constructed according to the principles of the present invention, which can be used in a system having a filter housing and a riser.

[0074] Figure 16 yes Figure 15 Exploded perspective view of the filter element;

[0075] Figure 17 It is similar to Figure 15 Another embodiment of the filter element of the present invention is shown, but with a different size ratio;

[0076] Figure 18 yes Figure 17 Exploded perspective view of the filter element;

[0077] Figure 19 Is it possible to... Figure 15-18 A schematic diagram of the system used in the embodiments;

[0078] Figure 20 yes Figure 19 A schematic diagram of the system, in which are installed Figure 15-18 One of the filter cartridges;

[0079] Figure 21 This is a schematic diagram of a kit constructed according to the principles of the present invention and the steps for using the kit; and

[0080] Figure 22 It can be used Figure 21 A perspective view of an embodiment of a tubular core in a system. Detailed Implementation

[0081] A. Existing filter systems, Figure 1-5

[0082] Figure 1-5 An existing filter system 20 is shown. System 20 is a schematic diagram of its components, including a filter housing 22 designed to house a filter element (not in use) for filtering fluids (e.g., fuel). Figure 1 (As shown in the diagram). The filter housing 22 has sidewalls 24 and endwalls 26. The sidewalls 24 and endwalls 26 define a filter element space 28, which is large enough to accommodate a filter element therein, wherein the endwalls 26 form a closed end of the space 28. The housing 22 has an open end or opening 30 opposite to the endwalls 26. The housing 22 includes an inlet opening (not shown) through which liquid to be filtered (e.g., fuel) enters the space 28. A clean liquid outlet 32 ​​is located near the endwalls 26 through which the filtered liquid exits and flows toward the engine. An air outlet 34 is also located near the endwalls 26 through which air in the filter housing 22 returns to the fuel tank.

[0083] A fluid passage, represented by a riser 36, is fixed to the end wall 26 and extends upward toward the opening 30 of the housing 22 into the space 28. The riser 36 comprises a generally cylindrical body with sidewalls 38 extending from its bottom end 40 adjacent to the end wall 26 to a terminal end 42. The sidewalls 38 enclose a space divided by a partition 48 into an airflow passage 44 and a clean liquid (fuel) flow passage 46. The airflow passage 44 communicates with an air outlet 34, allowing air entering the riser 36 to flow from the riser 36 into the air outlet 34, exiting the fuel assembly and being directed back to the fuel tank. The clean fuel flow passage 46 communicates with a clean fuel outlet 32, allowing clean fuel entering the riser 36 to flow from the riser 36 into the clean fuel outlet 32, flowing toward the engine.

[0084] A flow restrictor valve assembly 50 is located at the end 42 of riser 36 to control the flow of fuel into riser 36 and provide an air passage to the outside of filter system 20. Valve assembly 50 can prevent fuel from flowing into riser 36 when no filter element (not shown) is installed or when an incorrect filter element is installed.

[0085] See now Figure 2-5 The riser 36 has an opening at its terminal 42, and the valve assembly 50 is fixed to the terminal 42. The valve assembly 50 includes a valve ball 54. Figure 2 In the process of installing the filter element, the valve ball 54 is used to block fuel from flowing through the clean fuel passage 46. This prevents all fuel from flowing into the housing 22 when the filter element is not installed or when an incorrectly matched filter element is installed.

[0086] exist Figure 3 When the filter element is installed, the protrusion 56 moves the valve ball 54, opening the airflow passage 44 and the clean fuel passage 46. The protrusion 56 has an opening passage 57 extending through it.

[0087] exist Figure 4 In the middle, the protrusion 56 engages with the rubber part 180 and communicates with the air flow channel 44. This allows air and unfiltered fuel to flow through it and exit the housing 22 through the air outlet 34. The opening channel 57 in the protrusion 56 allows air and unfiltered fuel to flow through it.

[0088] exist Figure 5 Unfiltered fuel continues to flow / eject through passage 57 in protrusion 56 and exit housing 22. Filtered fuel enters riser 36, flows around valve ball 54 and around protrusion 56, and enters clean fuel passage 46, from where it flows through clean outlet 32 ​​and toward engine.

[0089] B. Example filter system, Figure 6

[0090] See now Figure 6 The diagram schematically illustrates a system 60 constructed according to the principles of the present invention. System 60 includes a housing 62 having a removable cover 64. Housing 62 includes sidewalls 66 surrounding and defining an interior space 68. End walls 70 close the bottom of housing 62 and are opposite to the removable cover 64.

[0091] An unfiltered liquid inlet passes through the side wall 66 of housing 62 and allows unfiltered liquids (e.g., unfiltered fuel) to flow into the interior space 68 of housing 62. A filtered liquid outlet 74 is located near end wall 70 and allows filtered liquids to exit system 60, thereby flowing to downstream equipment, such as an engine. An air outlet 76 is also located near end wall 70, through which air 78 in filter housing 62 returns to the fuel tank.

[0092] The riser 80 is fixed to the end wall 70 and extends upward toward the cover 64 of the outer casing 62 into the space 68. The riser 80 is largely consistent with the preceding description. Figure 1 The riser 36 has the same construction. Thus, the riser 80 includes a generally cylindrical body with sidewalls 82, divided into an airflow passage 84 and a clean fuel flow passage 86. The airflow passage 84 communicates with the air outlet 76, allowing air 78 entering the riser 80 to flow from the riser 80 into the air outlet 76, exit the system 60, and be guided back to the fuel tank. The clean fuel passage 86 communicates with the clean fuel outlet 74, allowing clean fuel entering the riser 80 to flow from the riser 80 into the clean fuel outlet 74 and towards the engine.

[0093] Inside the space 68 of the housing 62, at the base of the riser 80, is the unfiltered fuel outlet 88. Figure 6 In the diagram, unfiltered fuel outlet 88 is schematically covered with an X to indicate that... Figure 6 In the view, it is sealed and closed. During use, the unfiltered fuel outlet 88 allows unfiltered fuel in the space 68 of housing 62 to flow through riser 80 and exit housing 62 through air outlet 76 back to the fuel tank. When the filter element is removed from housing 62 during servicing, the unfiltered fuel outlet 88 is either unsealed or open. Example available filter elements are further described below.

[0094] Riser 80 may include valve assemblies, such as those described above. Figure 1-5 The valve assembly 50. When the filter element is installed in the housing 62, the airflow discharge passage 90 opens to allow air 78 trapped between the cover 64 and the remaining contents in the space 68 of the housing 62 to exit through the discharge passage, flow through the air outlet 76, and return to the fuel tank.

[0095] Located in space 68 and on riser 80 is filter element 92. Filter element 92 generally includes filter media 94, which works to remove particulates and debris from fuel flowing into system 60 through unfiltered inlet 72. After flowing through media 94, the filtered fuel then flows through filtered port 96 in riser 80, thereby entering clean fuel passage 86 and exiting through filtered liquid outlet 74 for engine use.

[0096] The filter element 92 includes a small vent hole 98 at its upper part, which allows air 78 to flow into the exhaust passage 90 and into the airflow passage 84 to exit the system 60 through the air outlet 76. The vent hole 98 also allows a small amount of unfiltered fuel to pass through and flow back to the fuel tank via the exhaust passage 90 and the airflow passage 84 and then through the air outlet 76.

[0097] When the filter element 92 is placed on the riser 80, it seals and closes the unfiltered fuel outlet 88 in the riser 80. When the filter element 92 is removed from the housing 62, the unfiltered fuel outlet is opened after the cover 64 is removed, allowing any fuel discharge in the space 68 of the housing 62 to flow through the unfiltered fuel outlet 88 and back to the fuel tank via the air outlet 76.

[0098] C. Example filter element, Figure 7-14

[0099] See now Figure 7-10 It shows that it can be used Figure 6 Two embodiments of the filter element 92 in system 60. Figure 7-10 The filter element 92 shown includes filter element 100. Figure 7 and 8 ) and filter element 101 ( Figure 9 and 10 Filter elements 100 and 101 are structurally identical, differing only in length. That is, appropriate filter elements 100 and 101 will be selected and matched into system 60 according to its dimensions. The descriptions of filter elements 100 and 101 are identical, including the same reference numerals, generally referring to both filter elements 100 and 101, which are indicated by reference numeral 92.

[0100] The filter element 92 includes a first filter media configuration 104. The first filter media configuration 104 can be many different types of filter media, but is generally preferred to be a pleated media 105. The pleated media 105 forms a tubular extension having a first end 106 and an opposing second end 107. The tubular configuration can be generally cylindrical, defining an internal space 108 with an opening.

[0101] The filter element 92 also includes a first end plate 110 connected to the first end 106 and a second end plate 112 connected to the second end 107.

[0102] The first end plate 110 can be Figure 8 and 10 As seen in the perspective view, the first end plate 110 has a generally circular shape, wherein the axial surface 114 is surrounded by an annular peripheral edge 116. Extending from the axial surface 114 are a plurality of hook-shaped protrusions 118. In some embodiments, the hook-shaped protrusions 118 may be configured to interact with the cover 64.

[0103] At the center of the axial surface 114 of the first end plate 110 is a generally closed surface 120, which defines a small air vent 122. The diameter of the vent 122 is no greater than 1 cm and is generally less than 10% of the overall diameter of the first end plate 110. The vent 122 allows air 78 contained between the cover 64 and the housing 62 to be discharged from the system 60 by flowing through the vent passage 90, the airflow passage 84, and then through the air outlet 76.

[0104] The second end plate 112 can be Figure 8 and 10 As seen in the perspective view, the second end plate 112 is generally circular, with the axial portion 124 surrounded by an annular circumferential edge 126.

[0105] The axial portion 124 of the second end plate 112 surrounds the opening 128. An inner axially extending edge 130 surrounds the opening 128. Figure 7 and Figure 9 In the cross-sectional view, it can be seen how the first part 131 included in the inner edge 130 extends into the internal space 108 and how the second part 132 included in the inner edge 130 extends axially away from the rest of the filter element 92.

[0106] The filter element 92 includes a gasket 134. The gasket 134 is located at the second end 107 of the first filter media configuration 104. Generally, the gasket 134 is used to seal the unfiltered outlet 88 on the closed riser 80. When the filter element 92 is removed from the riser 80, the gasket 134 is removed from the position covering the unfiltered fuel outlet 88, allowing any unfiltered fuel within the housing 62 to flow through it, into the airflow passage 84, and out through the air outlet 76.

[0107] The gasket 134 can be attached to the filter element 92 in many different configurations. In the example shown, the gasket 134 is supported by a gasket support 136, which is defined by a second portion 132 of the inner edge 130 of the second end plate 112. The gasket support 136 extends axially away from the remainder of the filter element 92. The gasket 134 is located within a groove 138 of the gasket support 136. In the example shown, the gasket 134 is arranged radially inward between and abuts against the second portion 132 of the second end plate 112 and the outer wall 82 of the riser 80.

[0108] The filter element 92 also includes a liner 140. The liner 140 extends between a first end 106 and a second end 107 and lines the interior space 108 of the first filter media configuration 104. The liner 140 includes a porous portion 142 through which liquid is allowed to flow toward an interior 143; and a non-porous portion 144 through which liquid is not allowed to flow.

[0109] The filter element 92 also includes an inner plate 146. The inner plate 146 is spaced from each of the first end plate 110 and the second end plate 112. The inner plate 146 extends along a plane perpendicular to the central longitudinal axis of the liner 140, which passes through the first end plate 110 and the second end plate 112. In this embodiment, the inner plate 146 is generally parallel to the first end plate 110 and the second end plate 112.

[0110] In this embodiment, the inner plate 146 is closer to the first end plate 110 than to the second end plate 112. The inner cavity 148 is defined between the first end plate 110 and the inner plate 146, wherein a non-perforated portion 144 of the liner 140 forms a surrounding wall of the cavity 148. The non-perforated portion 144 extends between the first end plate 110 and the inner plate 146.

[0111] The inner plate 146 defines an opening 150 extending through it. The opening 150 is in fluid communication with the inner cavity 148. The inner cavity 148 is configured to contain air therein.

[0112] According to the principles of the present invention, the filter element 92 includes a tubular core 152. The tubular core 152 is movably oriented within the liner 140.

[0113] The tubular core 152 is movably oriented between the second end plate 112 and the inner plate 146 along the longitudinal axis. Thus, the core 152 is a free-floating core that moves along the longitudinal axis of the core 152.

[0114] The tubular core 152 has a first end 154 and an opposing second end 156. The sidewall 158 extends between the first end 154 and the second end 156.

[0115] In many example embodiments, the tubular core 152 includes a pin or protrusion 160. The protrusion 160 may be formed as a single piece with the rest of the core 152. In other embodiments, it may be a separate piece. The protrusion 160 defines an open flow channel 162 through which it passes. Although many embodiments are possible, in the example shown, the protrusion 160 extends from a first end 154 and into the internal space 164 of the core 152. The first end 154 of the core 152 is generally solid and non-porous, except for the fluid channel 162 defined by the protrusion 160. The second end 156 of the core 152 is an open end.

[0116] As will be explained in further detail below, the core 152 is free-floating and movable between a first position and a sealed position, wherein in the first position, the core 152 can move along the longitudinal axis of the core 152; in the sealed position, the core is removably sealed to the liner 140. When the core 152 is in the sealed position, the fluid passage 162 through the protrusion 160 provides an airflow passage from the inner cavity 148 to the outside of the filter element 92 through the holes 150 of the inner plate 146.

[0117] The tubular core 152 includes a seal 166. When the core 152 is in the sealed position, the seal 166 is used to form a releasable seal with the liner 140.

[0118] In the illustrated example embodiment, seal 166 is an outwardly radially oriented seal 167. The outwardly radial seal 167 may be disposed adjacent to a first end 154 of the core 152 and abut against a sidewall 158 of the core 152. As in Figure 7 and Figure 9 As can be seen, the outward radial seal 167 surrounds the first end 154 of the core 152.

[0119] In many embodiments, the tubular core 152 includes a second filter media configuration 170. The second filter media configuration 170 can be of different types of filter media, but when used in system 60 for a fuel filter, it is convenient for the second filter media configuration 170 to include a hydrophobic medium. The hydrophobic medium repels and prevents water from penetrating. Thus, it facilitates the formation of water droplets so that they coalesce and drip to the bottom of the filter element 92 by gravity.

[0120] In many embodiments, the sidewall 158 of the core 152 has a tapered shape with the second end 156 larger than the first end 154; however, in other configurations, the core 152 may be a straight cylinder rather than a tapered shape. When the filter element 92 is mounted on the riser 80, a fuel bypass 172 is formed between the second end 156 of the core 152 and the riser 80 during filtration operations. Figure 13 The sidewall 158, from the first end 154 to the second end 156, may have a draft angle between 0.25 and 3 degrees to define the tapered sidewall 158.

[0121] The tapered tubular core 152 offers several advantages. For example, the shape helps align the riser 80 with the core 152 when the filter element 92 is installed into the housing 62. The core 152 is narrower at its first end 154 to help ensure that the protrusion 160 can self-center within the riser 80 and engage properly. Self-centering in the riser 80 facilitates proper alignment of the seal 166 of the core 152 with the corresponding sealing surface when the seal 166 engages along the inner wall of the liner 140.

[0122] At the second end 156 of core 152 is a radially extending outer flange 174. The outer flange 174 has an inner radial clearance to riser 80 and an outer radial clearance to liner 140. These two clearances result in no significant contact at the second end 156 of core 152, restricting its degrees of freedom when fully installed. Instead, the point of contact for installation engages with riser 80 at the first end 154 of core 152 via seal 166 and protrusion 160. This allows core 152 greater residual freedom to self-align in the assembly and accommodate misalignment or assembly tolerances required by housing 62 and riser 80.

[0123] The fluid passage 162 in the protrusion 160 allows air to escape from the housing 62 through a simple cover 64. Trapped air can prevent the use of the filter element 92, causing it to reach the end of its service life prematurely.

[0124] During filtration, air 78 is drawn back to the fuel tank so that it can be removed from system 60. Once ready, unfiltered fuel from outside the first filter media configuration 104 follows the same path as air 78, flowing through the discharge port 122, into the inner cavity 148, through the fluid passage 162 in the protrusion 160, into the airflow passage 84, and then out through the air outlet 76. This unfiltered fuel is continuously discharged back to the fuel tank through the fluid path in the protrusion 160. A radial seal formed on the core 152 by outwardly oriented seals 167 prevents the continuously discharged unfiltered fuel from flowing through the clean fuel filter passage 86 and into the engine.

[0125] The free end or tip of the protrusion 160 is made of a hard material, such as hard plastic. This protrusion 160 is inserted into the rubber part 180 inside the riser 80. Figure 2-5 Radial sealing is achieved. The sealing engagement with riser 80 and protrusion 160, as well as the proper dimensionaling of fluid passage 162 through protrusion 160, helps control the return of fuel to the fuel tank and prevents it from blocking the engine.

[0126] As mentioned above, bypass 172 is formed. Figure 13This has several advantages. For example, a common problem is that using a hydrophobic medium / filter as the final separation mechanism to remove water droplets from fuel may depend on several factors, one of which is the face velocity of the fuel flow on the filter. Filter effectiveness may also depend on the pressure differential across the filter. Reducing the pressure differential increases the water separation effectiveness of the filter. By using bypass 172, the face velocity to the second filter media configuration 170 is reduced, and the pressure differential across the second filter media configuration 170 is also reduced. The observed advantages of reducing the face velocity and pressure differential outweigh any effect of allowing a limited amount of fuel to bypass the second filter media configuration 170. Bypass 172 helps control the distribution of coalesced water droplet size discharged from filter element 92.

[0127] See now Figure 11-14 . Figure 11 and Figure 14 The filter element 92 is shown, with the tubular element 152 in a first position, ready for installation or placement on the riser 80. (See diagram below.) Figure 11 and Figure 14 As can be seen, the seal 166 is positioned away from the sealing surface 178 along the inner wall of the liner 140, which is adjacent to the inner plate 146.

[0128] Figure 12 The first step of placing the filter element 92 onto the riser 80 is shown. The filter element 92 is placed onto the riser 80 and within the internal space 68, which is the filter element space within the housing 62. For clarity, Figure 12 and Figure 13 The outer shell 62 is omitted.

[0129] As the filter element 92 descends onto the riser 80, the final protrusion 160 engages with the rubber component 180 inside the riser 80. Figure 2-5 This will subsequently cause the tubular core 152 to move axially in the liner 140 from the direction of the second end plate 112 toward the inner plate 146.

[0130] Ultimately, the seal 166 on the tubular core 152 contacts the sealing surface 178 of the liner 140, while the first end 154 of the tubular core 152 may abut or engage the inner plate 146. A seal is then formed between the seal 166 and the sealing surface 178 of the liner, and the tubular core 152 is removably secured in the sealed position. Figure 13 ).

[0131] When core 152 is located Figure 13In the sealed position, the fluid passage 162 of the protrusion 160 is aligned with the opening 150 in the inner plate 146. The protrusion 160 engages with the airflow passage 84 in the riser 80 to provide airflow passage for air 78 and air in the inner cavity 148 of the filter element 92 to the outside of the filter element 92 (e.g., to the fuel tank).

[0132] By comparison Figure 12 and Figure 13 It can be seen that part of the method of installing filter element 92 includes forming a seal between the gasket 134 on filter element 92 and riser 80.

[0133] When the filter element is installed on riser 80, such as Figure 13 As shown, the protrusion 160 engages the valve assembly 50 and causes the valve ball 54 to... Figure 2 Move the position to Figure 5 This opens a clean fuel flow passage 86 in the riser 80 and establishes an airflow path between the fluid passage 162 in the protrusion 160 and the airflow passage 84 in the riser 80.

[0134] Methods of filtering fuel may include using a filter element 92 mounted on riser 80 in filter housing 62, and a tubular core 152 that allows some fuel to bypass between the second end 156 of core 152 and riser 80.

[0135] D. Example filter element, Figure 15-18 ; and the system, Figure 19 &20

[0136] See now Figure 15-18 Two other embodiments of filter element 202 are shown. Filter element 202 can be used in similar... Figure 6 The system 302 shown is different, though not identical. For example, system 302, in which filter element 202 is used, includes a housing 362 having a housing body 364 having sidewalls 366 and endwalls 368 defining a filter element space 370 to accommodate filter element 202 therein. A riser 372 extends from the endwall 368 into the filter element space 370. Filter element 202 can be mounted on the riser.

[0137] Figure 15 and Figure 16 The filter element shown is indicated by reference numeral 200, while Figure 17 and Figure 18The filter element shown is indicated by reference numeral 201. Filter elements 200 and 201 are structurally identical, differing only in length and width. That is, depending on the size of the system in which filter elements 200 and 201 are used, a suitable filter element 200 or 201 will be selected to fit within the system. The description of filter elements 200 and 201 is identical and will include the same reference numerals. The general reference numerals for filter elements 200 and 201 will be indicated by reference numeral 202.

[0138] The filter element 202 includes a first filter media configuration 204. The first filter media configuration 204 can be many different types of filter media, but is generally a pleated media 205. The pleated media 205 forms a tubular extension having a first end 206 and an opposing second end 207. The tubular configuration can be generally cylindrical, defining an open internal space 208.

[0139] The filter element 202 defines a central longitudinal axis 209. The central axis 209 is centered within the filter element 202 and within the first filter media configuration 204. As will be further explained below, in the example embodiment, the riser 372 to which the filter element 202 is fitted will be off-axis. That is, the central longitudinal axis 374 of the riser 372 will not be collinear with axis 209. Figure 19 ).

[0140] The filter element 202 also includes a first end plate 210 connected to the first end 206 and a second end plate 212 connected to the second end 207.

[0141] The first end plate 210 is in Figure 16 and Figure 18 As can be seen in the perspective view, the first end plate 210 has a generally circular shape and a recessed portion 214 in the center. Generally, the first end plate 210 is a closed surface, but at the center of the recessed portion 214 is a small hole structure 216, including one or more through holes and a burp valve device 218. The burp valve device 218 includes an umbrella-shaped burp valve 219 and a shield 220. Figure 15 and 17 ).

[0142] The perforation 216 and the reflux valve device 218 allow air contained between the cover (e.g., cover 64) and the housing 62 to be discharged from the system by flowing through the reflux valve device 218.

[0143] The second end plate 212 is generally circular and has an axial portion 224. The axial portion 224 surrounds the opening 226. The axial portion 224 defines a radial recess 228 for receiving a seal 230.

[0144] In this example embodiment, the radial recess 228 extends outward, such that the seal 230 forms a radially outwardly extending seal. In other embodiments, the radial recess 228 and the seal 230 may extend radially inward.

[0145] The filter element 202 also includes a liner 240. The liner 240 extends between the first end 206 and the second end 207 and lines the interior space 208 of the first filter media structure 204. Generally, the liner 240 is porous to allow liquid flowing through the first media structure 204 to flow toward the interior 242.

[0146] See Figure 15 and Figure 17 The liner 240 includes a first portion 244 having a first inner diameter. The first portion 244 engages against and is adjacent to the second end plate 212.

[0147] The liner 240 also includes a second portion 246 having a second inner diameter. The second inner diameter is smaller than the first inner diameter of the first portion 244. The second portion 246 is axially spaced from the second end plate 212 such that the first portion 244 is axially located between the second portion 246 and the second end plate 212.

[0148] A similar structure can be seen at the opposite ends of the filter element 202, including a third portion 248 adjacent to the first end plate 210. The diameter of the third portion 248 is larger than the diameter of the second portion 246. The second portion 246 extends along most of the length of the filter element 202 and is axially spaced from each of the first end plate 210 and the second end plate 212 by the corresponding third portion 248 and the first portion 244.

[0149] According to the principles of the present invention, the filter element 202 includes a tubular core 252. The tubular core 252 is movably oriented within the liner 240. The tubular core 252 can move longitudinally within the liner 240. Thus, the core 252 is a free-floating core.

[0150] The tubular core 252 has a first end 254 and an opposing second end 256. A sidewall 258 extends between the first end 254 and the second end 256.

[0151] The tubular core 252 includes a second filter media configuration 260. The second filter media configuration 260 can be of different types of filter media, but it is generally convenient to include a hydrophobic medium. The hydrophobic medium repels and prevents water penetration. In this way, it helps to form water droplets so that they coalesce and drip to the bottom of the filter element 202 by gravity.

[0152] The tubular core 252 includes an outwardly radially oriented flange 262 adjacent to a second end 256 of the core 252. Although shown herein as a flange 262, it should be understood that the flange 262 may be segmented such that they are separate feet.

[0153] Flange 262 has an outer diameter smaller than the first inner diameter of the first portion 244 of the liner 240. The outer diameter of flange 262 is also larger than the second inner diameter of the second portion 246 of the liner 240. A tubular core 252 is disposed within the liner 240 such that flange 262 is located between the second end plate 212 and the second portion 246 of the liner 240. In this embodiment, the second end plate 212 has an internal axially extending wall 213 that extends into the interior of the filter element 202 and is located within the first portion 244 of the liner 240. The outer diameter of the axial extension 213 is smaller than the outer diameter of flange 262.

[0154] from Figure 15-17 As can be seen, the flange is movable within the first portion 244 of the liner 240, but is confined between and engages with the axial extension 213 of the second end plate 212 and the second portion 246 of the liner 240, moving axially. Specifically, the second portion 246 of the liner 240 has an axial surface 264 facing and toward the second end plate 212. The axial surface 264 forms the upper limit portion of the movement of the core 252.

[0155] The sidewall 258 of the core 252 has a tapered shape at the second end 256, which is larger than the first end 254. Due to the shape of the tubular core 252, when the filter element 202 is installed on the riser 372, during filtration operations, a shape similar to [missing information] is formed between the second end 256 of the core 252 and the riser 372. Figure 13 The fuel bypass 380 shown by reference numeral 172 in the attached figure ( Figure 20 The draft angle of the sidewall 258 from the first end 254 to the second end 256 is between 0.25 and 3° to define the tapered shape of the sidewall 258.

[0156] The bypass 380 formed between the sidewall 258 and the riser 372 has several advantages. These advantages are combined above. Figure 13 The embodiments were discussed and are applicable to Figure 15-17 The filter element 202 shown is shown.

[0157] The filter element 202 also includes a perforated outer winding layer 270. The outer winding layer 270 covers the first filter media structure 204 and extends from the first end plate 210 to the second end plate 212. (As shown in...) Figure 16 and Figure 18As can be seen, the outer winding layer 270 includes a solid, non-porous portion 272 extending from the first end plate 210 for a distance at least 25% of the length of the filter element 202. The length is typically less than 50% of the length of the filter element 202 and can be between 30% and 40% of the length of the filter element 202. The outer winding layer 270 also includes a perforated portion 274 extending from the solid, non-porous portion 272 to the second end plate 212.

[0158] As described above, in a system using filter element 202, riser 372 has a central longitudinal axis 374 that is not aligned with or collinear with the longitudinal axis 209 of filter element 202. When filter element 202 is installed in system 302, it is positioned on riser 372 and within filter element space 370 of housing 362, so that the tubular core 252 on riser 372 is moved into an off-axis position, not collinear with the central longitudinal axis 209 of filter element 202. See also Figure 20 This moves the flange 262 from its position abutting the axial extension 213 of the second end plate 212 into the axial surface 264 of the second portion 246 of the liner 240. That is, the radially oriented flange 262 engages with the liner 240 on the axial surface 264. This also ensures that the core 252 does not engage with or interfere with the hiccup valve assembly 218. The core 252 can float freely to accommodate the asymmetry of the housing 362 and the riser 372. No special timing is required for installation.

[0159] E. Figure 21 and Figure 22 Implementation examples

[0160] Figure 21 and Figure 22 It shows that it can be used Figure 6 and Figure 19 Replaceable embodiments of filters and cores in the system. Figure 21 and Figure 22 In this design, a tubular core 352 is used, similar to core 252, but without the radially oriented flange 262. This allows core 352 to pass through the second end plates 112, 212 of filter elements 92, 202. It can be understood that core 352 and filter elements 92, 202 are completely independent and separable components.

[0161] Figure 21 The kit 400 and the steps of a method for providing a filter assembly are shown. In step 1, the kit 400 is provided having a core 352 and filter elements 92, 202. In an alternative method, the core 352 and filter elements 92, 202 are provided separately. The core 352 may be constructed as described above for core 252, but without flange 262. It has a medium, such as a hydrophobic medium 460.

[0162] In step 2, the core 352 is positioned or oriented on the risers 80, 372 of the housing 402. The person installing the core 352 can independently align these components manually and visually.

[0163] In step 3, filter elements 92 and 202 are positioned or oriented on top of the core and on the risers 80 and 372 of the housing 402. This allows the installer to independently align the filter elements 92 and 202 manually and visually.

[0164] In step 4, before the system is ready, the housing 402 is closed by installing and securing the maintenance cover 406.

[0165] The above represents an example principle. Many implementations can be obtained by using these principles.

Claims

1. A filter element, comprising: (a) A first filter medium configuration that defines an internal space and has a first end and a second end; (b) A first end plate, the first end plate being connected to a first end; (c) A second end plate, the second end plate being connected to the second end; (d) Liner, the liner extending between the first end and the second end and lining the internal space of the first filter medium structure; (e) Inner plate, spaced apart from each of the first and second end plates, extending along a plane perpendicular to the central longitudinal axis of the liner; (i) The inner plate has an opening; (ii) The liner is non-porous between the first end plate and the inner plate and defines an inner cavity, which is configured to contain air; (f) A tubular core, the tubular core being in a liner and including opposing first and second ends, wherein a sidewall of a second filter medium extends between the opposing first and second ends. Both the first and second ends of the tubular core are located within the liner; When the filter element is installed on the riser, a fuel bypass is formed between the second end of the tubular element and the riser.

2. The filter element according to claim 1, wherein the second filter medium is constructed to include a hydrophobic medium.

3. The filter element according to claim 1, wherein the sidewall of the tubular core is tapered, and the second end is larger in diameter than the first end.

4. The filter element according to claim 3, wherein the sidewall of the tubular core has a draft angle between 0.25 and 3 degrees.

5. The filter element of claim 1, wherein the tubular core has a protrusion formed as a single piece with the core; the protrusion defines a fluid passage therethrough.

6. The filter element of claim 1, wherein the tubular core is movably oriented in the liner and the tubular core is free to float from a first position in which the tubular core can move along the longitudinal axis of the tubular core; and a sealing position in which the tubular core is sealed to the liner.

7. The filter element of claim 6, wherein the tubular core includes a seal that forms a seal with the liner.

8. The filter element according to claim 7, wherein the seal is an outwardly radially oriented seal.

9. The filter element according to claim 1 further includes a gasket located at the second end of the first filter medium structure.

10. The filter element of claim 9, wherein the second end plate has a washer support extending axially away from the rest of the filter element, and the washer is disposed in a groove of the washer support.

11. The filter element of claim 9, wherein the gasket is oriented radially inward.

12. The filter element according to claim 1, wherein the first end plate has an air vent.

13. The filter element of claim 1, wherein the liner includes a first portion having a first inner diameter adjacent to a second end plate, and a second portion having a second inner diameter smaller than the first inner diameter; the second portion is axially spaced from the second end plate, and therebetween the first portion.

14. The filter element of claim 13, wherein the tubular core includes a radially oriented flange adjacent to a second end of the core; the flange having an outer diameter: (i) smaller than a first inner diameter of a first portion of the liner; and (ii) larger than a second inner diameter of a second portion of the liner; and wherein the tubular core is axially and radially movable within the liner and is restricted in movement by the flange engaging against a second end plate or a second portion of the liner.

15. The filter element of claim 1, wherein the second end plate includes a radial seal.

16. The filter element of claim 15, wherein the radial seal is oriented outward.

17. The filter element according to claim 1, further comprising a perforated outer winding layer covering the first filter medium and extending from the first end plate to the second end plate.

18. The filter element of claim 17, wherein the porous outer winding layer comprises: (a) A solid, non-porous portion extending from the first end plate at a distance equal to at least 25% of the length of the filter element; and (b) The perforated portion extends from the non-perforated portion to the second end plate.

19. The filter element of claim 1, wherein the first end plate includes a valve device configured to release trapped air from the inner cavity.

20. The filter element of claim 1, wherein the tubular core and the rest of the filter element are independently separable.

21. A combination of a filter housing and a filter element as claimed in any one of claims 3 and 6-20, comprising: (a) A filter housing having a housing body having side walls and end walls defining a filter element space, a riser extending from the end walls along a longitudinal axis into the filter element space, the riser including an airflow passage, and at least one opening in the riser communicating with the filter element space; and (b) A filter element is configured to be placed in the filter element space; The engagement of the protrusion with at least one opening in the riser provides an airflow channel to the outside of the filter element.

22. A filter element, comprising: (a) A first filter medium configuration that defines an internal space and has a first end and a second end; (b) First end plate, connected to the first end; (c) Second end plate, connected to the second end; (d) Liner, extending between the first end and the second end and lining the internal space of the first filter medium structure; (e) Inner plate, spaced apart from each of the first and second end plates, extending along a plane perpendicular to the central longitudinal axis of the liner; (i) The inner plate has an opening; (ii) The liner is perforated between the first end plate and the inner plate and defines an inner cavity, which is configured to contain air; (f) A tubular core, movably oriented within the liner, and having a protrusion; (i) The core is movably oriented along the longitudinal axis between the second end plate and the inner plate; (ii) The protrusion defines the fluid passage through which it passes; (iii) The core is free-floating and movable from a first position, wherein the core can move along the longitudinal axis of the core in the first position, and a sealing position, wherein the core is sealed to the liner in the sealing position; and The tubular core includes a first end and a second end opposite to each other, both of which are located within the liner; In the sealed position, the fluid passage through the protrusion provides an airflow channel from the inner cavity to the outside of the filter element.

23. The filter element of claim 22, wherein the tubular element comprises a second filter media configuration.

24. The filter element of claim 23, wherein the second filter medium is configured to include a hydrophobic medium.

25. The filter element of claim 22, wherein the tubular core includes a seal that forms a seal with the liner.

26. The filter element of claim 25, wherein the seal is an outwardly radially oriented seal.

27. The filter element of claim 22, wherein the tubular element has opposing first and second ends; (a) The first end of the core has a protrusion that extends from the first end and into the interior of the core; (b) The second end of the core is an open end.

28. The filter element of claim 27, wherein the seal is an outwardly radially oriented seal surrounding a first end of the element.

29. The filter element of claim 27, wherein the tubular element includes a sidewall extending between a first end and a second end of the element; the sidewall has a tapered shape at the second end of the element, which is greater than that at the first end of the element.

30. The filter element of claim 29, wherein when the filter element is mounted on a riser, a fuel bypass is formed between the second end of the element and the riser.

31. The filter element according to claim 22 further includes a gasket located at the second end of the first filter medium structure.

32. The filter element of claim 31, wherein the second end plate has a gasket support extending axially away from the rest of the filter element, and the gasket is disposed in a groove of the gasket support.

33. The filter element of claim 31, wherein the gasket is oriented radially inward.

34. The filter element of claim 22, wherein the first end plate has an air vent.

35. The filter element according to claim 22, wherein the protrusion and the core are formed as a single piece.

36. A combination of a filter housing and a filter element as claimed in any one of claims 22-35, comprising: (a) A filter housing having a housing body having side walls and end walls defining a filter element space, a riser extending from the end walls along a longitudinal axis into the filter element space, the riser including an airflow passage, and at least one opening in the riser communicating with the filter element space; (b) A filter element is configured to be placed in the filter element space; The engagement of the protrusion with at least one opening in the riser provides an airflow channel to the outside of the filter element.

37. A method for installing a filter element into a filter assembly, the method comprising: (a) A filter housing is provided having a housing body having side walls and end walls defining a filter cartridge space, a riser extending from the end walls along a longitudinal axis into the filter cartridge space, the riser including an airflow passage, and at least one opening in the riser communicating with the filter cartridge space; (b) Providing a filter element as described in any one of claims 1 or 22; (c) Place the filter element on the riser and in the filter element space, and move the element from the first position to the sealed position; and (d) Align the fluid passage through the protrusion with the hole in the inner plate and engage the protrusion with at least one opening in the riser to provide an airflow passage from the inner cavity of the filter element to the outside of the filter element.

38. The method of claim 37 further comprises forming a seal between the gasket on the filter element and the riser.

39. A method for filtering fuel, comprising: (a) A filter element as described in any one of claims 1-20 and 22-35 is provided, mounted on a riser in a filter housing; and (b) Allow some fuel to bypass the tubular core between the second end of the core and the riser.

40. A method for installing a filter element into a filter assembly, the method comprising: (a) A filter housing is provided, the filter housing having a housing body having side walls and end walls defining a filter cartridge space, and a riser extending from the end walls into the filter cartridge space; (b) providing a filter element as claimed in any one of claims 1-20; the filter element having a central longitudinal axis; and (c) The filter element is placed on the riser and in the filter element space. The tubular core is moved to an off-axis position on the riser, not collinear with the central longitudinal axis of the filter element.

41. The method of claim 40, wherein: (a) The tubular core includes a radial flange adjacent to the second end of the core; and (b) The steps for setting up the filter element include moving the tubular element until the radial flange engages against the liner.

42. The method of claim 40, wherein the step of setting the filter element on the riser includes: (a) First, a tubular core is installed on the riser; and (b) Second, independent of the tubular core, the filter element is set on the tubular core and on the riser.

43. A filtering kit comprising: (a) Filter cartridge, including: (i) A first filter medium is constructed to define an internal space and has a first end and a second end; (ii) First end plate, connected to the first end; (iii) Second end plate, connected to the second end; and (iv) A liner extending between the first and second ends and lining the internal space of the first filter media structure; and (v) Inner plate, spaced apart from each of the first and second end plates, extending along a plane perpendicular to the central longitudinal axis of the liner; A) The inner panel has openings; B) The liner is non-porous between the first end plate and the inner plate and defines an inner cavity configured to accommodate air; and (b) A tubular core, the size of which is adapted to be inserted into the liner of a movable filter cartridge, and comprising opposing first and second ends, wherein a sidewall of a second filter media structure extends therebetween. The tubular core is configured to form a fuel bypass between the second end of the tubular core and the riser when the filter element is installed on the riser.

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