Filtration arrangements for liquids and methods of use.

Description

1 / 88 Filtration arrangements for liquids and methods of use. Related requests.

[0001] This application is being filed on April 12, 2024, as a PCT International Patent Application and claims the benefit and priority of a Patent Application. United States Provisional Patent No. 63 / 459,464, filed April 14, 2023, and Provisional Patent Application of United States Number 63 / 459,480, filed April 14, 2023, the entirety of which is incorporated by reference herein. FIELD OF TECHNIQUE

[0002] This disclosure relates generally to liquid filters and methods. Exemplary embodiments described include basin and cartridge assemblies and tank filter assemblies, for use, for example, in hydraulic or oil systems. BACKGROUND

[0003] Liquid filters are used in a variety of applications, including, for example, hydraulic systems, fuel systems and engine lubrication systems.

[0004] In general, liquid filters that house downstream components are a cause for concern. In particular, it is a concern to avoid cavitation of pumps and other equipment downstream of liquid filters. Conditions such as cold starts, flow spikes, or occluded elements can result in damaged downstream components. Petition 870250087534, dated 09 / 26 / 2025, page 220 / 514 2 / 88

[0005] Continuous improvements are desired. SUMMARY

[0006] In one aspect, a filter assembly is provided comprising: (a) a filter element with filter media; (b) a removable, positionable end arrangement on the filter element; (c) a first contiguity member and a second contiguity member with contiguity capability when the assembly is in a first condition and prevented from contiguity when the assembly is in a second condition; and (d) a transition arrangement to allow the assembly to transition between the first and second conditions.

[0007] In exemplary modalities:

[0008] - the first contiguous member includes a radially flexible member.

[0009] - the first contiguous member includes an axially rigid member.

[0010] - the transition arrangement is mechanically associated with the filter element.

[0011] - the first contiguous member includes a spiral spring and / or flat spring and / or clock spring.

[0012] - the first contiguous member is a flat spring shaped to form a partial closure.

[0013] - the transition arrangement includes a ramp in the filter element.

[0014] - the filter element has a first end and a second opposite end, and the ramp arrangement projects radially from the first end. Petition 870250087534, dated 09 / 26 / 2025, page 221 / 514 3 / 88

[0015] - the ramp arrangement is configured to radially adjust the flexible member radially when forced against the ramp arrangement in a direction from the first end to the second end.

[0016] - the first condition includes the radially flexible member with a first outermost dimension, and the second condition includes the radially flexible member with a second outermost dimension where the first outermost dimension is smaller than the second outermost dimension.

[0017] - the first condition includes the radially flexible member with a first outermost dimension, and the second condition includes the radially flexible member with a second outermost dimension where the first outermost dimension is larger than the second outermost dimension.

[0018] - the first contiguous member is connected to the end arrangement.

[0019] - the end arrangement is one of a filter head or a cover.

[0020] - the transition arrangement radially adjusts the first contiguous member to avoid the first contiguous member meeting the second contiguous member.

[0021] -The second contiguous member is part of a housing arrangement sized to receive the filter element.

[0022] - the housing arrangement includes a filter arrangement with an open interior, the open interior constructed and arranged to receive the filter element. Petition 870250087534, dated 09 / 26 / 2025, p. 222 / 514 4 / 88

[0023] - the filter arrangement has a first end cap, with the first end cap including the second contiguous member.

[0024] - the housing arrangement includes a filter basin that has an open interior, the open interior constructed and arranged to receive the filter element.

[0025] - the first contiguous member is connected to the end arrangement.

[0026] In one aspect, a filter assembly is provided comprising: (a) an end arrangement; (b) a first contiguous member in the filter assembly that is radially movable; and (c) a filter cartridge comprising: (i) a bundle of tubular means defining an open interior of means, the bundle of tubular means having a first end and an opposite second end; (ii) a central longitudinal geometric axis centered on the bundle of tubular means and passing through the first end and the second end; and (iii) a displacement member dimensioned and positioned to engage against the first contiguous member to move the first contiguous member radially when the filter cartridge is connected to the end arrangement.

[0027] In exemplary modalities:

[0028] - the displacement member includes a ramp arrangement.

[0029] - the displacement member includes a dynamic joint that pivots against the first contiguous member. Petition 870250087534, dated 09 / 26 / 2025, page 223 / 514 5 / 88

[0030] - the ramp arrangement includes a ramp surface angled at a non-zero angle and not perpendicular to the longitudinal geometric axis.

[0031] - The surface of the ramp is angled between 5 and 80 degrees.

[0032] - The surface of the ramp is angled between 15 and 70 degrees.

[0033] - The surface of the ramp has an angle of approximately 20 to 30 degrees.

[0034] - the filter cartridge has a first end cap fixed to the first end of the tubular media package and the ramp surface is an integral part of the first end cap.

[0035] - The first end cap has an external radial surface that defines the ramp surface.

[0036] - the ramp surface has a free attack end and a trailing end;

[0037] - the main free end projects axially away from a remaining part of the filter cartridge and towards the filter head; and the rear end along an outer periphery of the first end cap.

[0038] - the end arrangement comprises a filter head and a cover arrangement, the filter head having: (a) a wall surrounding an open interior and fluid channels; and (b) a first attachment arrangement along the wall, the wall having first and second opposite ends, each of the first and second Petition 870250087534, dated 09 / 26 / 2025, page 224 / 514 6 / 88 open ends.

[0039] - the cover arrangement is designed to be positioned removablely inside the filter head, including the cover arrangement: (i) a central hub that encircles a fluid conduit communicating with the fluid channels of the filter head; (ii) a second fastener arrangement constructed and arranged for removable connection with the first fastener arrangement; wherein, when the cover arrangement is positioned over the first cartridge, the displacement member moves the first contiguous member radially to allow the second fastener arrangement of the cover arrangement to connect to the first fastener arrangement of the filter head.

[0040] - the end arrangement includes a filter head, the filter head having: (a) a wall surrounding an open interior and fluid channels; and (b) a first arrangement of fasteners along the wall, the wall having first and second opposite ends, the second end being open and sized to connect to a filter basin.

[0041] - the end arrangement additionally includes a filter bowl with an open interior, the open interior constructed and arranged to receive the filter element, the filter bowl with a second fastening arrangement connecting in a removable manner to the first fastening arrangement.

[0042] - the filter cartridge includes a sealing member positioned to form a seal with the arrangement of Petition 870250087534, dated 09 / 26 / 2025, page 225 / 514 7 / 88 end; and the first end cap has an external axial surface holding the sealing member.

[0043] - The first end cap is an open end cap.

[0044] - the filter cartridge additionally includes a second end cap attached to the second end of the tubular media package.

[0045] - The second end cap is a closed end cap.

[0046] - The second lid is an open-end lid.

[0047] - the tubular media package is an inner tubular media package; and the filter cartridge additionally includes an outer tubular media package spaced radially and encircling the inner tubular media package.

[0048] - the inner tubular media package consists of pleated media; and the outer tubular media package comprises pleated media.

[0049] - the outer tubular means package has a first end and a second opposite end; and the first end cap is fixed to the first end of the outer tubular means package.

[0050] - the inner tubular media bundle has a greater axial length than the outer tubular media bundle; and the first end of the inner tubular media bundle is closer to the cover arrangement than the first end of the outer media bundle. Petition 870250087534, dated 09 / 26 / 2025, page 226 / 514 8 / 88 external tubular.

[0051] - the filter cartridge additionally includes an outer coating enclosing the outer tubular media package; the outer coating extending between the first end cap and a second opposite cap.

[0052] - the first contiguous member is attached to the end arrangement.

[0053] - the first contiguity member circumscribes a central cube in the end arrangement.

[0054] - the first contiguity member comprises an axially rigid and radially flexible spring that moves radially in response to the force against the spring by the displacement member.

[0055] - the first contiguity member comprises a flat spring that moves radially when engaged against the ramp surface and when free from contact with the ramp surface.

[0056] - the end arrangement includes a cover arrangement with a plurality of posts projecting from the central hub; and the spring is mounted in a sliding manner on the plurality of posts.

[0057] - the end arrangement includes a filter head with a surrounding wall with a plurality of posts projecting from the surrounding wall into the filter head; and the spring is slidably mounted on the plurality of posts.

[0058] - the cover arrangement includes: (a) a closed cover member with an external radial surface Petition 870250087534, dated 09 / 26 / 2025, page 227 / 514 9 / 88 which defines the second fastening arrangement; (b) an axially spaced sealing ring from the cover member, the sealing ring holding a radially oriented sealing member positioned to form a seal with the filter head; (c) the sealing ring with a first axial surface and a second opposite axial surface, the first axial surface being oriented towards the cover member; and (d) the central hub extending from the second axial surface.

[0059] - the central hub has an outer diameter of 50 to 80% of the outer diameter of the sealing ring.

[0060] - the radially oriented sealing member of the sealing ring is directed outwards.

[0061] - the first fastener arrangement and the second fastener arrangement are threaded.

[0062] - the first contiguity member is radially movable between an innermost position and an outermost position, the innermost position having a dimension D1 and the outermost position having a dimension D2; and the ratio of D1:D2 is between 0.74 and 0.98.

[0063] In one aspect, a filter cartridge is provided comprising: (a) a tubular media bundle defining an open media interior, the tubular media bundle having a first end and an opposite second end; a central longitudinal geometric axis centered within the tubular media bundle and passing through the first end and second end; and a displacement arrangement attached to the media bundle, the displacement arrangement including at least one engagement projection with Petition 870250087534, dated 09 / 26 / 2025, page 228 / 514 10 / 88 a leading edge and a trailing edge.

[0064] In exemplary modalities:

[0065] - the leading edge is closer to the central longitudinal geometric axis than to the trailing edge.

[0066] - the trailing edge is closer to the central longitudinal geometric axis than to the leading edge.

[0067] - the displacement arrangement comprises a plurality of engagement projections.

[0068] - the tubular media package is cylindrical.

[0069] - A straight line extending between the leading edge and the trailing edge for at least one or a plurality of engagement projections is angled at a non-zero angle and not perpendicular to the longitudinal geometric axis.

[0070] - The straight line extending between the leading edge and the trailing edge is angled between 5 to 80 degrees, or 15 to 70 degrees, or 20 to 30 degrees.

[0071] - at least one or a plurality of hitch projections is straight.

[0072] - at least one or a plurality of hitch projections is not straight.

[0073] - there is only one engagement projection forming a radially continuous surface.

[0074] - the radially continuous surface of the engagement projection encircles the media package.

[0075] - at least one or plurality of engagement projections comprise a ramp.

[0076] - The ramp is angled between any of 5 Petition 870250087534, dated 09 / 26 / 2025, page 229 / 514 11 / 88 at 80 degrees, or 15 at 70 degrees, or 20 at 30 degrees.

[0077] - The ramp is angled between any of 100 to 175 degrees, or 105 to 165 degrees, or 150 to 160 degrees.

[0078] - the filter cartridge has a first end cap fixed to the first end of the tubular media package, and at least one or plurality of engagement projections are an integral part of the first end cap.

[0079] - the first end cap has an external radial surface that defines at least one or multiple engagement projections.

[0080] - the filter cartridge includes a sealing member positioned to form a seal with a cover arrangement; and the first end cap has an external axial surface holding the sealing member.

[0081] - The first end cap is an open end cap.

[0082] - the filter cartridge additionally includes a second end cap attached to the second end of the tubular media package.

[0083] - the filter cartridge additionally includes an outer coating around the tubular media package, the outer coating extending between the first end cap and a second opposite cap.

[0084] - the displacement arrangement extends to a distal end with a stepped cross-sectional profile defining at least one radially facing surface and at least one downward facing surface. Petition 870250087534, dated 09 / 26 / 2025, page 230 / 514 12 / 88 axially.

[0085] - at least one surface facing the radiation is a radial surface facing outwards.

[0086] - at least one radially facing surface is an inwardly facing radial surface.

[0087] - the stepped cross-section profile includes a single step.

[0088] - the stepped cross-sectional profile includes a plurality of steps.

[0089] - the distal end additionally includes an axial extension inserted radially from the stepped cross-sectional profile.

[0090] In one aspect, a method of maintaining a filter assembly, the filter assembly including an end arrangement and a filter cartridge; the method comprising: (a) moving the end arrangement with a first contiguous member against a displacement member to radially displace the first contiguous member; and (b) tightly engaging the end arrangement with the filter cartridge.

[0091] Examples of methods include:

[0092] - moving the first contiguity member against the displacement member includes moving the first contiguity member against a ramp arrangement.

[0093] - moving the first contiguity member against the displacement member includes moving the first contiguity member against an embedded hinge.

[0094] - the filter cartridge has a first Petition 870250087534, dated 09 / 26 / 2025, p. 231 / 514 13 / 88 end cap; and wherein moving the first contiguous member against the displacement member includes moving the first contiguous member against the displacement member that is an integral part of the first end cap.

[0095] - moving the first contiguous member radially includes moving the first contiguous member radially outward.

[0096] - moving the first contiguous member radially includes moving the first contiguous member radially inward.

[0097] - Radially moving the first contiguous member includes radially moving an axially rigid and radially flexible spring.

[0098] - Moving the end arrangement includes moving a cover arrangement holding the first contiguous member.

[0099] - Moving the end arrangement includes moving a filter head holding the first contiguous member.

[00100] In one aspect, a filter assembly is provided comprising: (a) a filter cartridge with filter media and a first end cap containing an axially arranged sealing member; (b) an end arrangement dimensioned to engage against the filter cartridge and form a seal with the sealing member; and (c) an anti-rotation arrangement constructed and arranged to prevent the filter cartridge and the end cap arrangement from rotating together. Petition 870250087534, dated 09 / 26 / 2025, page 232 / 514 14 / 88 in relation to the other.

[00101] In exemplary modalities:

[00102] - the end arrangement comprises a cover.

[00103] - the cover is received in a removable form within the filter head.

[00104] - the end arrangement comprises a filter head.

[00105] - the anti-rotation arrangement includes a projection and receiver arrangement.

[00106] - the projection and arrangement of the receiver are positioned to provide less than full radial support to the sealing member.

[00107] - the sealing member is supported along at least some locations along an inner or outer radial side, or both inner and outer, of the sealing member.

[00108] - the anti-rotation arrangement includes a first set in the filter cartridge and a second set in the end arrangement.

[00109] - the first set of the anti-rotation device includes: (a) an outer ring of projections and receivers that encircles the sealing member; (b) each of the projections of the outer circular crown defines a closing zone; (c) each of the receivers in the outer ring defines an open area; and (d) a ratio between the open area and the closed area is 0.2-1.

[00110] - the second set of the anti-rotation device includes: (a) a first ring of projection cubes Petition 870250087534, dated 09 / 26 / 2025, page 233 / 514 15 / 88 and receivers; (b) each of the projections of the first central ring defines a closed area; (c) each of the receivers in the first cube ring defines an open area; and (d) the ratio between the open area of ​​the first cube ring and the closed area of ​​the first cube ring is 1-1.3.

[00111] - the first set of the anti-rotation arrangement in the filter cartridge includes an inner ring of projections and receivers radially inside the sealing member, so that the sealing member is positioned between the outer ring and the inner ring.

[00112] - the second set of the anti-rotation arrangement in the end arrangement includes a second hub ring with projections and receivers radially inward to the first hub ring; wherein, when the end arrangement is engaged against the filter cartridge, the sealing member is between the first hub ring and the second hub ring.

[00113] - the filter cartridge includes a cartridge thread; and the end arrangement includes an end arrangement thread positioned to rotatably engage the cartridge thread.

[00114] - the first set and the second set of anti-rotation arrangements are positioned to engage before the cartridge thread and the end arrangement threads engage.

[00115] - the filter media includes a cylindrical extension of pleated media surrounding an open filter interior and extending between the first end cap and a second end cap; and the first end cap has a Petition 870250087534, dated 09 / 26 / 2025, page 234 / 514 16 / 88 opening in communication with the interior of the open filter.

[00116] In one aspect, a filter assembly is provided comprising: (a) an end arrangement comprising: (i) a cube with a surrounding wall circumscribing an opening; (ii) the surrounding wall with an axial terminal surface; (iii) an outer ring of cubes with circumferentially spaced projections; and (b) a filter cartridge with filter media and an end cap arrangement holding a sealing member; the end cap arrangement nested with the outer ring of the cube to rotationally secure the filter cartridge and the end arrangement.

[00117] In exemplary modalities:

[00118] - the filter cartridge end cap arrangement includes an outer ring projection arrangement nested with the outer ring hub of circumferentially spaced projections, the filter cartridge outer ring projection arrangement being positioned to radially support the sealing member.

[00119] - the cube additionally includes an inner ring of the cube with circumferentially spaced projections, the inner ring of the cube being radially spaced and surrounded by the outer ring of the cube.

[00120] - the filter cartridge end cap arrangement includes an inner ring projection arrangement, the inner ring projection arrangement being radially inward and spaced from the outer ring projection arrangement; wherein the sealing member is between the arrangement Petition 870250087534, dated 09 / 26 / 2025, page 235 / 514 17 / 88 projection of the outer ring and the projection arrangement of the inner ring.

[00121] - the outer ring projection arrangement on the filter cartridge comprises a plurality of circumferentially spaced outer gears; and the inner ring projection arrangement on the filter cartridge comprises a plurality of circumferentially spaced inner gears; the outer gears are dimensioned to nest between the outer ring projections of the hub; and the inner gears are dimensioned to nest between the inner ring projections of the hub.

[00122] - the number of projections on the outer ring of the hub is different from the number of spaced outer gears on the filter cartridge.

[00123] - the number of projections on the outer ring of the hub is less than the number of spaced outer gears on the filter cartridge.

[00124] - the number of projections on the inner ring of the hub is different from the number of spaced internal gears in the filter cartridge.

[00125] - the number of projections on the inner ring of the hub is less than the number of internal gears spaced in the filter cartridge.

[00126] - the number of projections on the outer ring of the hub is equal to the number of external gears spaced on the filter cartridge; and the number of projections on the inner ring of the hub is equal to the number of internal gears spaced on the filter cartridge. Petition 870250087534, dated 09 / 26 / 2025, page 236 / 514 18 / 88

[00127] - the number of projections on the outer ring of the cube is equal to the number of projections on the inner ring of the cube.

[00128] - the number of projections on the outer ring of the cube is different from the number of projections on the inner ring of the cube.

[00129] - the number of externally spaced gears in the filter cartridge is equal to the number of internally spaced gears in the filter cartridge.

[00130] - the number of externally spaced gears in the filter cartridge is different from the number of internally spaced gears in the filter cartridge.

[00131] - the filter media includes a cylindrical extension of pleated media encircling an open filter interior and extending between a first end cap and a second cap; and the end cap arrangement is a single-piece integral part of the first end cap.

[00132] - the first end cap has an opening in communication with the interior of the open filter; the end cap arrangement is in an axial portion of the first end cap and circumscribes the opening; and the opening in the hub is in communication with the opening of the first end cap and the interior of the open filter.

[00133] - a housing that holds the filter cartridge in a removable manner, the housing having a threaded section of the housing; and the end arrangement with a threaded section of the end arrangement positioned to be connected to the threaded section of the bearing. Petition 870250087534, dated 09 / 26 / 2025, page 237 / 514 19 / 88

[00134] - there is a distance D1 between the beginning of the threaded section of the housing and the end tips of the threaded projection arrangement; there is a distance D2 between the beginning of the threaded section of the end arrangement and the end tips of the projections; and the distance D1 is greater than the distance D2.

[00135] In another aspect, a filter cartridge is provided comprising: (a) a tubular media bundle defining an open media interior, the tubular media bundle having a first end and an opposite second end; (b) a central longitudinal geometric axis centered on the tubular media bundle and passing through the first end and the second end; (c) an end device attached to the first end of the tubular media bundle; (d) a sealing member attached to an axial portion of the end arrangement within a plane orthogonal to the central longitudinal geometric axis; and (e) an anti-rotation arrangement to minimize bunching of the sealing element when the filter cartridge is attached to one of the filter caps or filter head.

[00136] In the examples:

[00137] - the anti-rotation arrangement is attached to or integral with the end arrangement.

[00138] - the anti-rotation arrangement is located in the axial portion of the end arrangement adjacent to the sealing member.

[00139] - the anti-rotation arrangement includes a plurality of projections located between the sealing member and an outer periphery of the end arrangement. Petition 870250087534, dated 09 / 26 / 2025, page 238 / 514 20 / 88

[00140] - The plurality of projections is separated by receptors arranged in an outer ring that encircles the sealing member.

[00141] - each of the projections in the outer ring of projections defines a closed area; each of the receptors in the outer ring of receptors defines an open area; and the ratio of the open area to the closed area is 0.2-1.0.

[00142] - the end arrangement further includes an internal series of circumferentially spaced projections separated by receivers arranged in an inner ring; the inner ring being radially inward and spaced from the outer ring; and the sealing member being between the outer ring and the inner ring.

[00143] - each of the projections in the inner ring of projections defines a closed area; each of the receptors in the inner ring of receptors defines an open area; and the ratio of the open area of ​​the inner ring to the closed area of ​​the inner ring is 0.2-1.0.

[00144] - the end arrangement comprises a first end cap fixed to the first end of the means package; the first cap has a first axial surface oriented away from the means package and a second axial surface oriented towards the means package; and the outer ring, the inner ring and the sealing member are on the first axial surface.

[00145] - The first end cap has an open opening communicating with the interior of the open media. Petition 870250087534, dated 09 / 26 / 2025, page 239 / 514 21 / 88

[00146] - the inner ring is radially spaced and encircles the open aperture.

[00147] - the outer ring is along an outer edge of the first end cap.

[00148] - the number of projections on the outer ring of spaced projections is equal to the number of projections on the inner ring.

[00149] - the number of projections in the outer ring of spaced projections is different from the number of projections in the inner ring.

[00150] - each of the projections of the outer ring has the same shape as each of the projections of the inner ring.

[00151] - each of the projections of the outer ring has a different shape from each of the projections of the inner ring.

[00152] - each of the projections of the outer ring has a triangular shape.

[00153] - each of the projections of the inner ring has a triangular shape.

[00154] In another aspect, a method is provided for connecting a filter assembly to a filter end arrangement; the filter end arrangement is one of a filter head or filter cap; the filter assembly, including a filter cartridge mounted in a removable housing; the filter cartridge with a plurality of cartridge projections and receivers positioned to engage the filter end arrangement; the filter end arrangement with a plurality of projections of the arrangement of Petition 870250087534, dated 09 / 26 / 2025, page 240 / 514 22 / 88 ends and receivers positioned to engage the filter cartridge; the method comprising: positioning the cartridge projections to be received at least partially within the end arrangement receivers, allowing the filter cartridge to move axially towards the end arrangement; after the filter cartridge moves axially towards the end arrangement, engaging a thread in the housing with a thread in the end arrangement; and rotating the housing relative to the end arrangement to connect the filter assembly to the filter end arrangement.

[00155] In an exemplary method, (a) the filter cartridge includes an axially mounted sealing member adjacent to the cartridge projections and receivers; and (b) the filter assembly connection step to the filter end arrangement includes radial support of the sealing member between the cartridge projections and the end arrangement projections.

[00156] In one example, a filter cartridge may include: a tubular media bundle defining an open media interior, the tubular media bundle having a first end and an opposite second end; a central longitudinal geometric axis centered within the tubular media bundle and passing through the first end and second end; an end cap attached to the first end of the tubular media bundle; a sealing member attached to an axial portion of the end cap; and a first plurality of projections extending into a Petition 870250087534, dated 09 / 26 / 2025, page 241 / 514 23 / 88 axial direction from the end cap, the first plurality of projections being provided in a circumferential arrangement and located close to a radial side of the sealing member.

[00157] In some examples, the first plurality of projections circumscribes the sealing member.

[00158] In some examples, the first plurality of projections is enclosed by the sealing member.

[00159] In some examples, the first plurality of projections extends axially beyond the sealing member.

[00160] In some examples, each of the projections of the first plurality of projections has a similar geometry.

[00161] In some examples, the first plurality of projections includes one or more projections that are different from one or more other projections.

[00162] In some examples, the first plurality of projections has a triangular shape, a trapezoidal shape, a rectangular shape with flat, rounded or pointed ends, and a curved shape.

[00163] In some examples, the first plurality of projections has a symmetrical shape.

[00164] In some examples, the first plurality of projections has an asymmetrical shape.

[00165] In some examples, the first plurality of projections is separated by a first plurality of receiver gaps.

[00166] In some examples, each of the gaps in Petition 870250087534, dated 09 / 26 / 2025, p. 242 / 514 24 / 88 receiver of the first plurality of receiver gaps has similar geometry.

[00167] In some examples, the first receptor gap plurality includes one or more receptor gaps that are different from one or more other receptor gaps.

[00168] In some examples, each of the projections of the first plurality of projections has a similar geometry, where each of the receiver gaps of the first plurality of receiver gaps has a similar geometry.

[00169] In some examples, the circumferential arrangement includes a second plurality of circumferentially arranged projections.

[00170] In some examples, the first plurality of projections encircles the sealing member and the sealing member encircles the second plurality of projections.

[00171] In some examples, the peaks of the first plurality of projections are radially aligned with the peaks of the second plurality of projections.

[00172] In some examples, the peaks of the first plurality of projections are radially misaligned with the peaks of the second plurality of projections.

[00173] In some examples, the projections of the first plurality of projections have a geometry similar to the geometry of the projections of the second plurality of projections.

[00174] In some examples, the projections of the first plurality of projections have a different geometry from the geometry of the projections of the second plurality of projections. Petition 870250087534, dated 09 / 26 / 2025, p. 243 / 514 25 / 88

[00175] An example of a method of connecting a filter assembly to a filter end arrangement, wherein the filter end arrangement is one of a filter head or filter cap; wherein the filter assembly includes a filter cartridge mounted in a removable manner in a housing; the filter cartridge having an axially mounted sealing member; the filter end arrangement having a plurality of end arrangement projections positioned to engage the filter cartridge may include the steps of positioning the filter cartridge so that the sealing member is at least partially received within the end arrangement projections, allowing the filter cartridge to move axially towards the end arrangement; after the filter cartridge moves axially towards the end arrangement, engaging a thread in the housing with a thread in the end arrangement;and rotating the housing relative to the end arrangement to connect the filter assembly to the filter end arrangement, such that the end arrangement projections radially support one side of the filter cartridge sealing member. In some examples, the arrangement includes a plurality of end arrangement receivers and the filter cartridge includes a plurality of filter cartridge projections, wherein the filter cartridge positioning step includes positioning the filter cartridge so that the plurality of filter cartridge projections are received by the end arrangement receivers. Petition 870250087534, dated 09 / 26 / 2025, page 244 / 514 26 / 88

[00176] A variety of examples of desirable product features or methods are presented in part in the following description, and in part will be apparent from the description, or can be learned by practicing various aspects of this disclosure. Aspects of the disclosure may relate to individual features as well as combinations of features. It should be understood that both the preceding general description and the following detailed description are merely explanatory and are not restrictive of the claimed invention. BRIEF DESCRIPTION OF THE DRAWINGS

[00177] Figure 1 is a cross-sectional view of a filter assembly according to an embodiment of the present disclosure, including a filter cartridge operably mounted within a filter basin and connected to a filter head, the cross-section being taken along line AA of Figure 2.

[00178] Figure 1A is an enlarged cross-sectional view of a portion of the filter cartridge shown in Figure 1.

[00179] Figure 2 is a top, plan view of the filter assembly in Figure 1.

[00180] Figure 3 is a cross-sectional view of the filter assembly of Figure 1, but without the filter cartridge mounted inside it.

[00181] Figure 4 is an enlarged view of a section of the filter assembly in Figure 3.

[00182] Figure 5 is a perspective view of a Petition 870250087534, dated 09 / 26 / 2025, page 245 / 514 27 / 88 embodiment of a liquid filter assembly, constructed in accordance with the principles of this disclosure.

[00183] Figure 6 is a cross-sectional view of the assembly in Figure 5.

[00184] Figure 7 is a perspective view of a filter cartridge used in the assembly of Figure 6.

[00185] Figure 8 is a cross-sectional view of the filter cartridge of Figure 7.

[00186] Figure 9 is an enlarged portion of the filter cartridge from Figure 8.

[00187] Figure 9A is a perspective and cross-sectional view of an alternative embodiment of the filter cartridge with the ramp surface as a separate piece from the rest of the cartridge end cap.

[00188] Figure 10 is an enlarged perspective view of an upper part of the filter cartridge of Figure 7.

[00189] Figure 11 is an enlarged perspective view of a portion of Figure 10.

[00190] Figure 12 is a schematic diagram of the filter assembly in Figure 5.

[00191] Figure 13 is a perspective view of a housing for the liquid filter assembly of Figure 5.

[00192] Figure 14 is a cross-sectional view of the housing shown in Figure 13.

[00193] Figure 14A is an enlarged view of a portion of Figure 14.

[00194] Figure 15 is a perspective view. Petition 870250087534, dated 09 / 26 / 2025, page 246 / 514 28 / 88 top of a cover used in the filter assembly of the Figure 1.

[00195] Figure 16 is a cross-sectional view of the roof shown in Figure 15.

[00196] Figure 17 is a cross-sectional view of a stage of the cover of Figure 15 being oriented towards the filter cartridge of Figure 7.

[00197] Figure 18 is an enlarged perspective view of part of the cover in Figure 15.

[00198] Figure 19 is an enlarged perspective view of a portion of Figure 18.

[00199] Figure 20 is a schematic cross-sectional view of an alternative embodiment of the coupling between the filter cover and the filter element.

[00200] Figure 21 is a schematic cross-sectional view of the arrangement shown in Figure 20 at another stage of engagement.

[00201] Figure 22 is a schematic cross-sectional view of a part of the filter assembly of Figure 5, but without the filter element installed with it.

[00202] Figure 23 is a top, planar cross-sectional view of the assembly shown in Figure 22.

[00203] Figure 24 is a schematic cross-sectional view of the filter assembly of Figure 22, with the filter element positioned in an operable manner during an assembly step.

[00204] Figure 25 is a schematic cross-sectional view of the filter assembly of Figure 24, during another Petition 870250087534, dated 09 / 26 / 2025, page 247 / 514 29 / 88 assembly stage.

[00205] Figure 26 is a top, planar cross-sectional view of the filter assembly in Figure 25.

[00206] Figure 27 is a schematic cross-sectional view of the filter assembly of Figures 25 and 26, showing the complete assembly.

[00207] Figure 28 is a top, planar cross-sectional view of the filter assembly in Figure 27.

[00208] Figure 29 is a schematic cross-sectional view of an alternative embodiment of a filter assembly during an assembly step.

[00209] Figure 30 is a top cross-sectional view of the filter assembly in Figure 29.

[00210] Figure 31 is a schematic cross-sectional view of the embodiment of Figure 29, during another assembly stage.

[00211] Figure 32 is a top cross-sectional view of the filter assembly of Figure 31.

[00212] Figure 33 is a schematic cross-sectional view of the embodiment of Figure 29 showing the filter assembly without an operable filter element installed.

[00213] Figure 34 is a perspective view of another embodiment of a filter assembly according to the present disclosure, including an operably mounted (fully assembled) filter cartridge within a filter basin and connected to a filter head.

[00214] Figure 35 is a front elevation view. Petition 870250087534, dated 09 / 26 / 2025, page 248 / 514 30 / 88 of a part of the filter assembly in Figure 34, during a step connecting the filter cartridge and the basin to the filter head.

[00215] Figure 36 is a perspective view of part of the filter assembly in Figure 35.

[00216] Figure 37 is a perspective view of the fully assembled filter assembly portion of Figure 36.

[00217] Figure 38 is a perspective view of the filter cartridge used in the filter assembly of Figures 34-17.

[00218] Figure 39 is a perspective view of the filter head used in the filter assembly of Figures 34-17.

[00219] Figure 40 is a perspective view of another embodiment of a filter assembly according to the present disclosure, including a tank with a filter head and removable cover, a filter cartridge (not visible) being operably mounted inside the tank and connected to the filter head and cover.

[00220] Figure 41 is a cross-sectional perspective view of the filter assembly of Figure 40, showing the filter cartridge operationally mounted inside the tank and connected to the filter head and cover.

[00221] Figure 42 is an enlarged view of a portion of the filter assembly in Figure 41.

[00222] Figure 43 is a perspective view of portions of the filter cartridge and filter cover of Figure 40 during an assembly step. Petition 870250087534, dated 09 / 26 / 2025, page 249 / 514 31 / 88

[00223] Figure 44 is a schematic representation of one embodiment of the filter assembly during a step of connecting the assembly to a filter head or cover.

[00224] Figure 45 is a schematic representation of another embodiment of the filter assembly during a step of connecting the assembly to a filter head or cover; and

[00225] Figure 46 is a schematic representation of another embodiment of the filter assembly during a step of connecting the assembly to a filter head or cover.

[00226] Figures 47 to 50 show a partial view of an alternatively configured offset arrangement and extensions usable with any of the filter sets disclosed in this document.

[00227] Figures 51 and 52 are planar diagrams illustrating geometric aspects of the projection-receptor arrangements for the filter sets revealed in this document.

[00228] Figures 53 and 54 are plan view diagrams illustrating other geometric aspects of the projection receiver arrangements for the filter sets disclosed in this document.

[00229] Figures 55 to 66 are planar diagrams of projection receiver arrangements usable for any of the filter sets disclosed in this document. DETAILED DESCRIPTION Overview of example filter sets, Figures 1 and 5. Petition 870250087534, dated 09 / 26 / 2025, p. 250 / 514 32 / 88

[00230] Two different liquid filter arrangements or sets 20 are shown in Figures 3 and 5. Although these sets 20 are constructed differently and used in different filtration systems (as will be explained later), common reference numerals are used for common parts.

[00231] The liquid filter assembly 20 includes, in an operationally positioned manner, a repairable (i.e., removable and replaceable) filter element or cartridge 34 (Figures 1 and 6-10). The filter element or cartridge 34 has a first end 82 and a second opposite end. 84.

[00232] An end arrangement 21 is removable and positionable over the filter element 34. As used herein, the end arrangement 21 may include a filter head 24 or a top cover 28. In assembly 20 of Figure 5, the filter head 24 includes the cover 28, which is positioned removablely over it; whereas in assembly 20 of Figure 1, the filter head 24 does not have a removable head. For a typical liquid filter assembly, the filter head 24 will be a cast member, for example, made of cast aluminum or other material. In assembly 20 of Figure 5, the cover 28 is attached to the filter head 24 with a threaded connection 48, to close a service opening, with a sealing member 50.

[00233] Assembly 20 may additionally include a housing 22 with a side wall 30. In use, the side wall 30 extends (hangs down) from the filter head. Petition 870250087534, dated 09 / 26 / 2025, pp. 251 / 514 33 / 88 24. In general, housing 22 defines an internal volume 32 (Figures 4 and 14), in which selected internal components, as defined, are contained and certain filtering and flow operations occur.

[00234] In this document, top, above and below refer to set 20, when oriented for normal use, that is, when oriented as shown in Figures 3 and 5. The terms, by themselves, are not intended to be limiting or to have an additional definition.

[00235] The typical filter cartridge 34 additionally includes, as described below, an end cap arrangement 36 on the first end 82, which may be incorporated as a top or first cap 38, providing a preferential assembly and seal of the repairable filter cartridge 34 to the filter head 24 within the liquid filter assembly 20. The second end 84 of the filter cartridge 34 includes a second end cap 39.

[00236] In general, the repairable filter cartridge 34 includes the first end cap (upper end in use) 38. The first end cap 38, for the specific embodiment represented, is mounted on one end (the upper end in use) of the filter cartridge 34. The first end cap 38 includes an end cap portion 52 which, for example, may be a molded member attached (i.e., encapsulated) to the filter cartridge 34. The end cap portion 52 includes a central opening 54 for the passage of liquid to be directed to or from the Petition 870250087534, dated 09 / 26 / 2025, page 252 / 514 34 / 88 end arrangement 21.

[00237] End cap 38 can be molded from a variety of moldable plastic materials, for example, a polyamide (PA). For example, a glass-filled polyamide (15-30% glass-filled by weight) is usable. It can also be formed as a metal part.

[00238] Filter cartridge 34 includes filter medium 56, sometimes referred to herein as media pack 56. Medium 56 may be pleated medium 58 contained in a pleated mesh or similar structure, with pleats extending between the first opposite end cap 38 and the second end cap 39.

[00239] The bundle of means 56, as shown in the exemplary embodiments, is generally tubular and encloses an open volume. The tubular bundle of means 56 is described as cylindrical in shape. A central longitudinal geometric axis 90 is centered within the bundle of means 56 and passes through the first end 82 of element 34 and the second end 84 of element 34.

[00240] Typical operation of assembly 20 in Figure 1 is generally as follows: The filter head 24 includes a fluid inlet channel 40, which receives dirty fluid (e.g., oil) from an upstream source. The fluid to be filtered flows into the filter head 24 and then into an unfiltered liquid volume 23, which is the volume between the side wall 30 and the filter medium 56. From there, the fluid passes through the filter medium 56 (referred to here as the filter flow), which removes dirt and debris from the fluid. The fluid enters a Petition 870250087534, dated 09 / 26 / 2025, page 253 / 514 35 / 88 volume of filtered liquid 25, which is inside the inner media package 56. From then on, the filtered liquid flows through the opening 54 in the first end cap 38 and to the filter head 24. The same exits the filter head 24 through an outlet channel 27. The preceding describes a direct flow operation (from outside to inside). In some cases, the assembly 20 can also operate in a reverse flow operation, in which the flow is from inside to outside.

[00241] Typical operation of assembly 20 of Figure 5 is generally as follows. The filter head 24 usually includes a body 26 which has fluid channels 40, 42. The fluid channel 40 can normally be an inlet arrangement 40 or an inlet. The fluid channel 42 can be a bypass channel. The liquid to be filtered is directed to the inlet arrangement 40. The unfiltered liquid then flows into an unfiltered liquid volume 44, inside the filter cartridge 34. In general, the volume 44 is an unfiltered liquid volume, since the liquid received into it will usually be received directly from a circulation circuit, will not be filtered and will require filtration. In normal operation, from the unfiltered liquid volume 44, the liquid is passed through the filter cartridge 34 to a filtered volume 46 around the filter cartridge 34 (a filtration flow).From the filtered volume 46, the liquid can pass from the filter cartridge 34 to the tank in which the cartridge 34 is seated. Although alternatives are possible, it should be noted that the assembly in Figure 5 does not include a central vertical tube projecting from the cartridge 34. Petition 870250087534, dated 09 / 26 / 2025, page 254 / 514 36 / 88

[00242] The second end cap 39 in Figure 1 is closed. In general, the second end cap 39 can be closed or open. In Figure 6, a sealing member 59 is against an external radial surface of the second end cap 39 and forms an outwardly directed radial seal with the side wall 30 of the housing 22.

[00243] In some assemblies, it may be desirable to provide the filter cartridge 34 with an external downstream coating 60 (Figure 6) such as a porous metal or plastic liner. For the direct flow assembly of Figure 1, the downstream coating 29 is an internal coating 29 that encloses the volume of filtered liquid 25 within the media pack 56.

[00244] In Figure 1, the filter element 34 includes a sealing member 31. The sealing member 31 is radially directed to form a seal with a part of the filter head 24. In the example shown, the sealing member 31 is held by a sealing support projection 33 that extends axially from the first end cap 38 in a direction away from the filter media package 56 and towards the filter head 24. The sealing member 31 forms a seal between the unfiltered liquid volume 23 and the filtered liquid volume 25. The sealing member 31 is radially positioned between a radial position of the upstream and downstream ends of the pleated media 58.

[00245] In Figure 7, the filter element 34 includes a sealing member 92 attached to an axial portion 94 of the end cap arrangement 36 within a plane orthogonal to Petition 870250087534, dated 09 / 26 / 2025, page 255 / 514 37 / 88 central longitudinal geometric axis 90. In the example embodiment shown, the sealing member 92 is oriented in the axial portion 94 of the first end cap 38. As shown in Figure 9, the axial portion 94 supporting the sealing member 92 is arranged orthogonally to the longitudinal geometric axis of the filter cartridge. However, the axial portion 94 may have a frusto-conical shape that is angled towards or away from the longitudinal geometric axis, so that the axial portion is arranged at an oblique angle to the longitudinal geometric axis.

[00246] In some embodiments, and as shown in Figures 7, 10 and 11, there may be an optional anti-rotation arrangement 98. The anti-rotation arrangement 98 is provided to minimize or prevent the sealing member 92 from bunching up when the filter element 34 is attached to a filter cover 28. The anti-rotation arrangement 98 is described further below. OVERVIEW OF THE INSTALLATION METHOD, FIGURE 12

[00247] Figure 12 is a schematic diagram that provides an overview of a method for installing filter cartridge 34 in housing 22, for each of the assemblies in Figure 1 and Figure 5.

[00248] The set 20 includes a first contiguity member 62 and a second contiguity member 63. The first contiguity member 62 and the second contiguity member 63 have contiguity capability on their respective engagement surfaces / regions 62a, 63a (Figures 3, 4, 16, 22) when the set 20 is in a first condition and prevented from contiguity when the set 20 is Petition 870250087534, dated 09 / 26 / 2025, p. 256 / 514 38 / 88 in a second condition.

[00249] Set 20 additionally includes a transition arrangement 64. The transition arrangement 64 allows the transition of set 20 between the first condition and the second condition.

[00250] In general, the first condition prevents the end arrangement 21 from fully connecting to a remaining part of the assembly 20, such as the filter head 24 or the housing 22. The second condition allows full connection between the end arrangement 21 and the remaining portion of the assembly. By full connection, it is understood that, if there is a threaded coupling, a sufficient number of threads are fastened to ensure that all sealing members are in place to form seals at the intended locations.

[00251] Although many embodiments are possible, the first contiguous member 62 includes a radially flexible member 66. In Figure 12, the radially flexible member is shown in ghost lines as moving radially along arrow 68. In preferred implementations, the first contiguous member 62 is axially rigid. By axially rigid, it is understood that, along a direction perpendicular to a plane containing the direction of radial flexibility, the first contiguous member 62 is rigid and does not move under normal compressive or tensile force. By normal compressive or tensile force, it is understood that forces are not so extreme as to damage or break the first contiguous member 62.

[00252] The first condition includes the member Petition 870250087534, dated 09 / 26 / 2025, page 257 / 514 39 / 88 radially flexible 66 with a first outermost dimension, and the second condition includes the radially flexible 66 member with a second outermost dimension. In some examples, the first outermost dimension is smaller than the second outermost dimension. In other examples, the first outermost dimension is larger than the second outermost dimension.

[00253] In some implementations, the radially flexible member 66 includes a radially flexible and axially rigid spring 70. There may be many embodiments, including a spiral spring, or a flat spring, or a clock spring, or a flat spring bent to form only a partial (incomplete) loop or a tension coil.

[00254] In some exemplary embodiments, at rest (not under force), the radially flexible and axially rigid spring 70 is in its first smaller external dimension. In other embodiments, the radially flexible and axially rigid spring 70, at rest (not under force), is in its second larger external dimension.

[00255] The radially flexible member 66 is an integral part of the assembly 20. In the exemplary embodiments shown, the radially flexible member 66 is connected to the end arrangement 21, which may include the filter head 24 or the cover 28. It is foreseen that the radially flexible member 66 may also be connected to other parts of the assembly 20.

[00256] The transition arrangement 64 is mechanically associated with the filter element 34. For example, the arrangement of Petition 870250087534, dated 09 / 26 / 2025, page 258 / 514 40 / 88 transition 64 includes an offset arrangement or member 72 attached to the media package 56. In some embodiments, the transition arrangement 64 may also be a separate part independent of the filter element 34.

[00257] An example of an embodiment of the displacement arrangement 72 is shown in Figures 1A and 9. The displacement arrangement 72 includes an engagement projection 74 with a leading edge 76 and a trailing edge 78. In the example in Figure 1A, the trailing edge 78 is closer to the central longitudinal geometric axis 90 (Figure 1) than the leading edge 76. In the example in Figure 9, the leading edge 76 is closer to the central longitudinal geometric axis 90 than the trailing edge 78.

[00258] The engagement projection 74 can be a radially continuous surface or a radially discontinuous surface. In the example shown in Figure 1A, the engagement projection 74 is radially continuous. The engagement projection 74 can also include at least one gap and, in some cases, a plurality of gaps. In the example in Figure 9, the engagement projection 74 is continuous and uninterrupted along the circumference.

[00259] The engagement projection 74 can be straight or of other shapes (curved, irregular, etc.). In the example in Figure 9, the engagement projection 74 is shown as straight and forms a ramp 80 (or ramp arrangement 80) on the filter element 34. The ramp 80 projects radially from the first end 82 of the filter element 34. In the example in Figure 1, the engagement projection 74 is straight and forms a ramp arrangement. Petition 870250087534, dated 09 / 26 / 2025, page 259 / 514 41 / 88 straight 80 on filter element 34. In some examples, the engagement projection 74 is not straight and forms a curved ramp arrangement 80 on filter element 34. In Figure 1, the ramp arrangement 80 projects radially from the first end 82 of the filter element, and the leading edge 76 projects above or over an end surface of the first end cap 38.

[00260] In Figure 1, the radially flexible member 66 slides against the ramp arrangement 80 to move the radially flexible member 66 to a radially inward position. When the radially flexible member 66 is a spring 70 and arranged as shown in Figure 1, the spring 70 moves radially inward when engaged against the ramp arrangement 80, and the spring 70 returns to its rest position to retract radially outward (Figure 4) when free from contact with the ramp arrangement 80.

[00261] In Figures 6 and 17, the radially flexible member 66 slides against the ramp 80 to move the radially flexible member 66 to a radially outward position. When the radially flexible member 66 is a spring 70 and arranged as shown in Figures 6 and 17, the spring 70 moves radially outward when engaged against the ramp 80, and the spring 70 returns to its rest position to retract radially inward when free from contact with the ramp 80.

[00262] Ramp 80 has an angled ramp surface 86 as measured along a surface between endpoints at a non-zero angle and not Petition 870250087534, dated 09 / 26 / 2025, page 260 / 514 42 / 88 perpendicular 88 (Figures 1A and Figure 9) with respect to the longitudinal geometric axis 90 and with respect to a line 90a parallel to the longitudinal geometric axis 90. In Figure 1A, the ramp surface 86 is angled not less than 5 degrees to ensure that the spring 70 is radially displaced inwards sufficiently to ensure that the filter head 24 can move to engage with the housing 22. The ramp surface 86 is angled not more than 80 degrees to ensure that the spring 70 is radially displaced. Typically, the ramp surface 86 is angled at an angle 88 between 5 and 80 degrees. In many cases, the angle 88 will be from 15 to 75 degrees. Preferably, the angle 88 is between 30 and 40 degrees.

[00263] In Figure 9, the surface of the ramp 86 is angled at an angle 88 of at least 5 degrees, to ensure that the spring 70 is radially displaced sufficiently to ensure that the cover 28 can move to engage with the housing 22. The surface of the ramp 86 is angled at an angle 88 not exceeding 80 degrees to ensure that the spring 70 is radially displaced. In preferred arrangements, the surface of the ramp 86 is angled at an angle 88 between 5 and 80 degrees; preferably about 15 to 70 degrees, and normally about 20 to 30 degrees.

[00264] In preferred arrangements, the ramp surface 86 is an integral part of the first end cap arrangement 36. As shown in Figures 1 and 9, the ramp surface 86 is part of the first end cap 38. Therefore, if the first end cap 38 is molded, the ramp surface 86 can be Petition 870250087534, dated 09 / 26 / 2025, p. 261 / 514 43 / 88 a molded piece with the remainder of the first end cap 38. In Figure 9A, the ramp surface 86 is a separate piece 86a from the remainder of an end cap 38a. This separate piece 86a can be fitted or fitted over the end cap 38a.

[00265] Figures 1 and 5 show the filter assembly 20 with the filter element 34 correctly positioned within the housing 22 and with the end arrangement 21 mounted and connected (threaded) to the remaining part of the assembly. Figures 17 and 25-28 show the assembly steps of the cover 28 onto the filter element 34. In Figures 17 and 25-28, the radially flexible and axially rigid spring 70 engages against the ramp surface 86 and is radially displaced outward from the smaller dimension to the larger dimension. This radial displacement of the radially flexible and axially rigid spring 70 allows the cover 28 to move axially toward the element 34 and deeper into the filter head 24 (Figures 6 and 27), which allows the threaded connection 48 between the head 24 and the cover 28 to engage. In Figure 1, the radially flexible and axially rigid spring 70 engages against the surface of the ramp 86 and is radially displaced inward from the larger dimension to the smaller dimension.This radial displacement of the radially flexible and axially rigid spring 70 allows the filter head 24 to move axially towards the bearing 22, which allows the threaded connection 48 between the head 24 and the bearing 22 to engage.

[00266] If filter element 34 did not include the appropriately shaped ramp surface 86, or if an element Petition 870250087534, dated 09 / 26 / 2025, page 262 / 514 If 44 / 88 were absent from assembly 20, the radially flexible and axially rigid spring 70 would not move radially, and the radially flexible and axially rigid spring 70 would be contiguous with the second contiguous member 63. This contiguity would prevent the end arrangement 21 from moving deeper and entering the threaded connection 48.

[00267] For example, in Figures 3 and 4, the radially flexible and axially rigid spring 70 is contiguous with an inwardly projecting shelf or protrusion 35 that extends radially into the side wall 30 of the housing 22, preventing the filter head 24 from moving further into the housing 22 and blocking the threaded engagement 48 between the filter head 24 and the housing 22. This is explained in more detail below, in connection with the description of Figures 1-4.

[00268] In the example shown in Figures 13, 14, 14A and 22, the radially flexible and axially rigid spring 70 confines with an extension 141 that extends axially from an end construction 151 in the housing 22, preventing the filter head 24 from moving further into the housing 22 and blocking the threaded engagement 48 between the filter head 24 and the housing 22. This is explained in more detail below, in connection with the description of the filter assembly in the tank of Figures 5, 6 and 15-17. EXEMPLARY BOWL-CARTRIDGE ARRANGEMENT, FIGURES 1-4

[00269] Assembly 20 in Figures 1-4 is a bowl and cartridge 300 arrangement. In the bowl and cartridge 300 arrangement, Petition 870250087534, dated 09 / 26 / 2025, page 263 / 514 45 / 88 The filter cartridge (or filter element) 34 is removable and replaceable within housing 22. Housing 22 is a bowl 302 that can be selectively connected and detached from the filter head 24. In this example, bowl 302 has threads. 304 (Figure 3) along an outer surface of the side wall 30 and adjacent to an open mouth 306 (Figure 1). The threads 304 then connect by threading to the threads 308 (Figure 3) on the filter head 24.

[00270] Although the example shown is a 300 basin and cartridge arrangement, alternatively, it could also be a threaded assembly, in which the element is permanently part of and not removable from the housing. Instead, the housing and element combination is a unit that is rotated by threads in the filter head. For maintenance, the entire housing and element are discarded and repositioned in the filter head.

[00271] Referring again to Figures 1 to 3, at one end 318 of basin 302 opposite the mouth 306, basin 302 has an open opening 320. The open opening 320 may accommodate a drain valve or other structure.

[00272] The filter head 24 has an outer wall 102 surrounding an open interior 104. Along an inner surface 310 of the wall 102 are the threads 308 of the filter head 24. The filter head 24 has a basin receiving opening 312 defined by the wall 102, which is sized to receive the basin 302 for threaded connection.

[00273] Basin 302 contains a sealing member 314 to form a releasable seal with the filter head 24. In this example, the sealing member 314 is directed Petition 870250087534, dated 09 / 26 / 2025, page 264 / 514 46 / 88 radially outward, away from the longitudinal geometric axis 90. The sealing member 314 is adjacent to a terminal end of the side wall 30 of the housing 22.

[00274] Below the threads 304 in the basin 302 is a radial projection stop flange 316. The flange 316 provides a stop surface or adjacent surface to receive a filter head end 24. The threads 304 are located axially between the stop flange 316 and the sealing member 314.

[00275] The filter head 24 includes an inner wall 322 (Figure 3). The sealing member 31 of the filter element 34 forms a releasable seal with the wall 322. In the example shown, the sealing member 31 is radially outward to form the seal along a radially inner surface of the wall 322. In other embodiments, the sealing member 31 may be radially inward against an outer part of the wall 322.

[00276] Along the inner surface of the side wall 30 of the basin 302 and adjacent to the mouth 306 is the shelf or projection extending inward 35. The projection 35 comprises the second contiguous member 63 and provides an engagement / surface region 63a to receive the first contiguous member 62. In the example shown in Figure 4, the projection 35 is part of the inner wall 322 of the basin 302, and is recessed inward from a remaining portion of the inner wall 322 in the region extending from a terminal end 328 of the basin 302 to a spaced point 330 (Figure 3). Petition 870250087534, dated 09 / 26 / 2025, page 265 / 514 47 / 88 from terminal end 328. Point 330 is typically a distance less than 10% of a total side wall length 30 from terminal end 328.

[00277] The first contiguous member 62, shown as a radially flexible and axially rigid spring 70, is represented in Figures 1-4 as connected to the filter head 24. In this example, the radially flexible and axially rigid spring 70 has openings that accommodate two or more posts 122 (Figure 4) projecting radially into the wall 102 of the filter head 24. Thus, the radially flexible and axially rigid spring 70 is mounted in a sliding manner on the plurality of posts 122. The posts are shown as including a head to aid in retaining the spring 70, but may also be supplied without heads in some arrangements and configurations. The radially flexible and axially rigid spring 70 is circumscribed by the wall 102, and the spring itself is radially spaced and circumscribes the inner wall 322 of the filter head 24.The radially flexible and axially rigid spring 70 has an engagement region / surface 62a, which is the terminal end of the spring 70, and engages or is contiguous with the protrusion 35 (Figures 3 and 4) on the engagement surface 63A, when there is an attempt to connect the filter head 24 and the basin 302, but there is no filter element – ​​or an unsuitable filter element – ​​installed in the basin 302. This engagement of the spring 70 with the protrusion 35 prevents the threads 308 on the filter head 24 from connecting with the threads 304 on the filter basin 302.

[00278] When the appropriate filter element 34 Petition 870250087534, dated 09 / 26 / 2025, page 266 / 514 48 / 88 is inside the filter basin 302, the displacement member 72 (Figure 1A) engages the radially flexible and axially rigid spring 70 to move the radially flexible and axially rigid spring 70 radially inward. This allows the filter head 24 to move into the threaded engagement and connection with the threads 304 and the filter basin 302 and form the seal between the sealing member 31 and the inner wall 322; and form the seal between the sealing member 314 (Figure 1) and the filter head 24. EXEMPLARY TANK FILTER ASSEMBLY; FIGURES 5, 6, 15-17

[00279] Assembly 20 in Figures 5 and 6 is a 400 tank filter arrangement. 400 tank filter arrangements are typically used in hydraulic systems and are submerged within a hydraulic oil tank to keep the oil clean and free of debris. In many typical arrangements, the 400 tank filter arrangement is used to filter the fluid before it exits the tank to enter a pump inlet line.

[00280] Referring now to Figures 5, 6 and 2227, the filter arrangement in tank 400 includes the filter head 24. The filter head 24 has a wall 102 surrounding the open interior 104 and fluid channels (e.g., 40, 42). The filter head 24 has a first fastening arrangement 106 along the wall 102. The first fastening arrangement 106 is shown as threads 108 that are part of the threaded connection 48. The wall 102 has first and second opposite ends 111, 112, each Petition 870250087534, dated 09 / 26 / 2025, page 267 / 514 49 / 88 of the first and second ends 111, 112 being opened.

[00281] The filter head 24 includes a flange 154 contained within a plane generally orthogonal to the longitudinal geometric axis 90. The flange 154 has holes 156 (e.g., Figure 23), which receive screws to allow the filter head 24 to be attached to a fluid tank.

[00282] Figures 15 and 16 show an exemplary embodiment of the cover 28. The cover 28 is designed to be removablely positioned within the interior 104 of the filter head 24. The cover 28 includes a central hub 114 that encircles a fluid conduit 116 communicating with the fluid channels 40, 42 of the filter head 24. A second fastening arrangement 118 is constructed and arranged for removable connection with the first fastening arrangement 106. The second fastening arrangement 118 includes threads 120 for coupling with threads 108.

[00283] The first contiguity member 62, shown as a radially flexible and axially rigid spring 70, is depicted in this document as attached to cover 28. In this example, the radially flexible and axially rigid spring 70 has openings that accommodate two or more posts 122 projecting radially from the hub 114. Thus, the radially flexible and axially rigid spring 70 is mounted in a sliding manner on the plurality of posts 122. The radially flexible and axially rigid spring 70 circumscribes the central hub 114 and moves radially in response to the force against the radially flexible and axially rigid spring 70 by the displacement member 72. Petition 870250087534, dated 09 / 26 / 2025, page 268 / 514 50 / 88

[00284] Referring now to Figure 16, the cover 28 includes a closed cover member 126 with an outer radial surface 128 defining the second fastener arrangement 118. A sealing ring 130 is axially spaced from the cover member 126. The sealing ring 130 contains a radially oriented sealing member 132 and is positioned to form a seal with the filter head 24.

[00285] The sealing ring 130 has a first axial surface 134 and a second opposite axial surface 136. The first axial surface 134 faces the cover member 126. The central hub 114 extends from the second axial surface 136.

[00286] In the example shown, the central hub 114 has an outer diameter of 50 to 80% of the outer diameter of the sealing ring 130. As shown, the radially oriented sealing member 132 of the sealing ring 130 is directed outwards.

[00287] In exemplary embodiments, the first contiguity member 62 (for example, the radially flexible and axially rigid spring 70 in one example) is radially movable between an innermost and an outermost position; the innermost position has a dimension (when round, a diameter) D1. The outermost position has a dimension (when round, a diameter) D2. A ratio of D1:D2 is between 0.74 and 0.98. An example of where D1 and D2 are measured is shown in Figures 30 and 32. In Figure 30, D1 is the dimension that passes through the geometric center point and is tangent to the innermost region of the radially flexible and axially rigid spring. Petition 870250087534, dated 09 / 26 / 2025, page 269 / 514 51 / 88 rigid 70. In Figure 32, D2 is the dimension that passes through the geometric center point and is tangent to the outermost region of the radially flexible and axially rigid spring 70.

[00288] An exemplary embodiment of the side wall 30 of the housing 22 is shown in Figures 13 and 14. The side wall 30 has an open mouth 140 and an opposite closed end 142. The open mouth 140 receives the filter element 34 within it.

[00289] The side wall 30 is represented as tubular, specifically cylindrical, and extends between the mouth 140 and the closed end 142. The side wall includes a first section 144, perforated, which functions as a filter 146. Extending between the first section 144 and the closed end 142 is a second section 148. The second section 148 has a smaller diameter than the first section 144. The second section 148 is less than 50% the length of the first section 144.

[00290] The first section 144 is shown holding an optional second stage of filter medium 150. The filter medium 150 may be a pleated medium or other types of medium. The second stage of filter medium 150 is radially spaced from the media bundle 56 of element 34. In the example arrangement shown, the second stage of filter medium 150 encircles the media bundle 56 and has a total length between 50 and 90% of the media bundle 56. Many alternatives are possible.

[00291] At one end of side wall 30 is an end construction 151. Filter medium 150 is attached to end construction 151. The construction of Petition 870250087534, dated 09 / 26 / 2025, page 270 / 514 52 / 88 end 151 includes an axially projecting external sealing retainer ring 153, extending along an outer perimeter of the end construction 151 and circumscribing the mouth 140. The sealing retainer ring 153 contains a sealing member 152 around the outer surface circumscribing the mouth 140. In the example shown, the sealing member 152 is radially outward directed. The sealing member 152 forms a seal with the filter head 24 (see Figure 6).

[00292] The end construction 151 further includes one or more extensions 141 projecting axially from it, away from the filter medium 150 and along an inner perimeter of the end construction 151 and an inner diameter of the filter medium 150. The extensions 141 are shorter in length than the retaining seal ring 153. The retaining seal ring 153 encircles the extensions 141 and is radially spaced from them to provide a receiving cavity 155 (Figure 14A) between them. The end construction 151 has an engagement surface 157 at a closed end of the receiving cavity 155. The engagement surface 157 is along an outer surface of the end construction 151 on an opposite side of the filter medium 150.The engagement surface 157 provides a surface for the radially flexible and axially rigid spring 70 to engage when the assembly is in the second condition – that is, in the embodiment of Figure 5, after the spring 70 has flexed radially outward to allow the end arrangement 21 (like the cover 28) to move into. Petition 870250087534, dated 09 / 26 / 2025, page 271 / 514 53 / 88 down to place sealing members 132 and 50 in their intended positions to form seals with the filter head 24; and to allow threaded connection between the cover 28 and the filter head 24.

[00293] The extensions 141 may include at least one and, in the embodiment shown, include a plurality of circumferentially spaced extensions 141.

[00294] Each of the extensions 141 includes a terminal end 158, which is the free end of the extensions 141 spaced from the engagement surface 157 and the filter medium 150. The terminal ends 158 are located to form the second contiguous member 63 to engage against the first contiguous member 62, when the assembly is in the first condition. The first condition prevents the end arrangement 21 (in this case, the cover 28) from fully connecting to a remaining part of the assembly 20 (in this case, the filter head 24).

[00295] As shown in Figure 22, when there is no filter cartridge 34 installed in housing 22, there is no transition arrangement 64 to allow the transition of assembly 20 to the second condition. That is, there is no displacement arrangement 72 (Figure 9) to radially flex the radially flexible and axially rigid spring 70, in this example, from a first (smaller) outer dimension to a second (larger) outer dimension. Thus, one end of the radially flexible and axially rigid spring 70 is contiguous (engages) with the ends of terminal 158 of extensions 141. The contiguity is shown by arrows 159 Petition 870250087534, dated 09 / 26 / 2025, page 272 / 514 54 / 88 in Figure 22. When the radially flexible and axially rigid spring 70 is contiguous with the ends of the extension terminals 158, the cover 28 is prevented from moving downwards on the filter head 24; preventing threaded engagement between the threads 120 on the cover 28 and the threads 108 on the filter head 24, leaving a gap 147a between them. The sealing members 50 and 132 are prevented from forming seals with the filter head 24. Figure 23 is a top view, showing the radially flexible and axially rigid spring 70 in its first outermost (smaller) dimension.

[00296] Figures 24 and 25 show the assembly steps of the filter assembly 20. The filter cartridge 34 is correctly installed in the housing 22 with the sealing member 150 forming a seal with the filter head 24. In Figure 24, the cover 28 is initially being lowered into position on the filter head 24. There is an engagement between the spring 70 and the trailing edge 78 of the displacement arrangement 72, which begins to move the spring radially outward (see arrow 161). The space between the cover 28 and the head 24 is shown in the gap 147b, which is too large for the threaded engagement. In Figures 25 and 26, the spring 70 has flexed radially outward as the cover 28 with the spring 70 has continued to move deeper into the filter head 24, making the gap 147b smaller, but still too large for the threaded engagement. The spring 70 is moving into the receiving compartment 155 (Figure 14A) toward the engagement surface 157.

[00297] Figures 27 and 28 show the complete assembly. The cover 28 and the filter head 24 are Petition 870250087534, dated 09 / 26 / 2025, page 273 / 514 55 / 88 connected to each other, and the seals at 50 and 132 are in place between the cover 28 and the filter head 24. The radially flexible and axially rigid spring 70 is inside the receiving compartment 155 and can be engaged against (or just beside) the engagement surface 157. Figure 28 shows the radially flexible and axially rigid spring 70 in its second (larger) outermost dimension. ALTERNATIVE MODE, FIGURES 20-21

[00298] Figures 20 and 21 show an alternative embodiment of the filter assembly 20. In this embodiment, the displacement member 72 includes an incorporated hinge 160. The incorporated hinge 160 is attached to the end cap arrangement 36. For example, the incorporated hinge 160 may be an integrally molded part of the first end cap 38 along the outer radial circumference.

[00299] The incorporated hinge 160 includes the first and second legs 162, 164, generally oriented perpendicular to each other. A hinge pivot point 166 is at the intersection of 162, 164.

[00300] In Figure 20, the first leg 162 is oriented vertically to be generally parallel to the longitudinal geometric axis 90, while the second leg 164 is oriented horizontally.

[00301] When the cover 28 is being oriented over the filter element 34, the first contiguity member 62 (e.g., radially flexible and axially rigid spring 70) passes over the first leg 162 (vertically oriented leg 162) to circumscribe the first Petition 870250087534, dated 09 / 26 / 2025, page 274 / 514 56 / 88 leg 162. A terminal end 168 of the first contiguous member 62 (e.g., radially flexible and axially rigid spring 70) is contiguous or engages with the second leg 164 (horizontally oriented leg 164).

[00302] In Figure 21, when the first contiguous member 62 (e.g., spring 70) makes contact with the second horizontally oriented leg 164, the first vertically oriented leg 162 rotates about a pivot point 166 radially outward, pushing the first contiguous member 62 (e.g., spring 70) radially outward. The further down the second leg 164 is pushed, the further the first leg 162 pushes the first contiguous member 62 (e.g., spring 70) outward. This radial displacement of the spring 70 allows the cover 28 to move axially toward the element 34 and deeper into the filter head 24 (Figure 6), which then allows the threaded connection 48 between the head 24 and the cover 28 to be engaged. ALTERNATIVE MODE, FIGURES 29-33

[00303] Figures 29-33 show an alternative embodiment. Although similar to assembly 20 of Figures 22-28, the first contiguous member 62 in this embodiment is radially flexible and axially rigid flat spring 71. The flat spring 71 is shaped to form a partial housing and therefore includes a gap 73 between the terminal ends 71a and 71b (see Figures 30 and 32).

[00304] The flat spring 71, in the embodiment shown, is a non-circular flexible band of 71'. In the example shown, the flexible band 71' has a plurality of straight segments. Petition 870250087534, dated 09 / 26 / 2025, page 275 / 514 57 / 88 intersecting with adjacent segments 75 at vertices 77, forming an open polygon shape with a gap 73. Although many variations are possible, in the non-limiting example shown, the open polygon shape is an octagon, with eight segments 75 and a gap 73 between endpoints 71a, 71b.

[00305] When assembly 20 moves between the first and second condition, the flat spring 71 bends radially outward from the first outermost dimension (Figures 30 and 33) to the second (larger) outermost dimension (Figure 32). This radial bending increases the distance between ends 71a and 71b, to increase the clearance 73.

[00306] Figures 29 and 30 depict the beginning of the pre-flexion of the engagement between the flat spring 71 and the displacement arrangement 72. The filter cartridge 34 is correctly installed in the housing 22 with the sealing member 150 forming a seal with the filter head 24. In Figure 29, the cover 28 is initially being lowered into position on the filter head 24. There is an engagement between the flat spring 71 and the displacement arrangement 72, which begins to move the flat spring 71 radially outward. The space between the cover 28 and the head 24 is shown in the gap 147b, which is too large for the threaded engagement.

[00307] Figures 31 and 32 show the complete assembly. The cover 28 and the filter head 24 are connected to each other, and the seals at 50 and 132 are in place between the cover 28 and the filter head 24. The radially flexible and axially rigid flat spring 71 is inside the receiving cavity 155 (Figure 14A) and can be engaged. Petition 870250087534, dated 09 / 26 / 2025, page 276 / 514 58 / 88 against (or just beside) the engagement surface 157. Figure 32 shows the radially flexible and axially rigid flat spring 71 in its second (larger) outermost dimension.

[00308] As shown in Figure 33, when there is no filter cartridge 34 installed in housing 22, there is no transition arrangement 64 to allow the transition of assembly 20 to the second condition. That is, there is no displacement arrangement 72 (Figure 9) to radially flex the radially flexible and axially rigid flat spring 71, in this example, from a first (smaller) outermost dimension to a second (larger) outermost dimension. Thus, one end of the flat spring 71 confines (engages against) the terminal ends 158 of the extensions 141. When the flat spring 71 is contiguous with the terminal ends 158 of the extensions, the cover 28 is prevented from moving downwards on the filter head 24; preventing threaded engagement between the threads 120 on the cover 28 and the threads 108 on the filter head 24, leaving a space 147a between them. Sealing members 50 and 132 are prevented from forming seals with the filter head 24. EXAMPLE OF ANTI-ROTATION ARRANGEMENT 98, FIGURES 10, 16, 18, 19

[00309] As mentioned above, assembly 20 may include an optional anti-rotation arrangement 98. The anti-rotation arrangement 98 minimizes or prevents the sealing member 92 from bunching up or extruding when the filter cartridge 34 is attached to the filter cover 28.

[00310] The 98 antirotation arrangement includes a portion Petition 870250087534, dated 09 / 26 / 2025, page 277 / 514 59 / 88 of the filter element 200 which is fixed or integral with the end cap arrangement 36. Typically, and as shown, the anti-rotation arrangement 98, which is portion 200 in the filter element 34, is an integrally molded portion of the first end cap 38.

[00311] As shown in Figure 10, portion 200 of the anti-rotation arrangement 98 is located on the axial portion 94 of the end cap arrangement 36 adjacent to the sealing member 92. Preferably, the anti-rotation arrangement 98 is located in a position to provide at least some lateral support to the sealing member 92.

[00312] In many preferred embodiments, the filter element portion 200 of the anti-rotation arrangement 98 is located between the sealing member 92 and an outer periphery 170 or edge of the end cap arrangement 36.

[00313] In the example shown, the filter element portion 200 of the anti-rotation arrangement 98 is along the outer periphery 170 of the first end cap 38. The filter element portion 200 of the anti-rotation arrangement 98 may include a plurality of projections 204. The projections 204 may be separated by receivers 206. The projections 204 and the receivers 206 form an outer ring 208 that circumscribes the sealing member 92. When positioned here, the projections 204 are positioned to provide at least some lateral support to the sealing member 92, especially when the filter element 34 has filter flow from inside the filter medium 56 to outside the filter medium 56. If the filter flow were reversed (i.e., from outside to Petition 870250087534, dated 09 / 26 / 2025, page 278 / 514 60 / 88 inside), the projections 204 would be provided in a ring inside the sealing member 92.

[00314] Although many modalities are possible, each of the projections 204 of the outer ring 208 defines a closed area, while each of the receivers 206 of the outer ring 208 defines an open area. The ratio of the open area to the closed area is 0.2-1.0

[00315] Referring now to Figures 16, 18 and 19, part of the antirotation arrangement 98 may include a filter cover portion 210. The filter cover portion 210 includes a first cube ring 211 of projections 212 and receivers 214. Each of the projections 212 of the first cube ring 211 defines a closed area, while each of the receivers 214 of the first cube ring 211 defines an open area. A ratio between the open area of ​​the first cube ring 211 and the closed area of ​​the first cube ring 211 is 1-1.3.

[00316] In many examples, the 206 / 214 receivers in the 200 element portion and the 210 cover portion are positioned and sized to receive the 204 / 212 projections in the 200 element portion and the 210 cover portion. However, the fit does not need to be exact, and the 206, 214 receivers may have a larger size, shape, and area compared to the 204, 212 projections. Together, the 204, 212 projections and the 206, 214 receivers define a projection and receiver arrangement.

[00317] In exemplary modalities, projections 204, 212 are circumferentially spaced with receptors 206, 214 between them. In some cases, the projections Petition 870250087534, dated 09 / 26 / 2025, page 279 / 514 61 / 88 204, 212 alternate uniformly with receptors 206, 214.

[00318] In preferred embodiments, the filter element portion 200 additionally includes an inner ring 216 with projections 217 and receivers 218 radially inward to the sealing member 92, such that the sealing member 92 is positioned between the outer ring 208 and the inner ring 216. The inner ring 216 and the outer ring 208 are oriented on the axial surface 94 of the first end cap 38 oriented away from the media package 56. Each of the projections 217 of the inner ring 216 defines a closed area, and each of the receivers 218 of the inner ring 216 defines an open area. The ratio between the open area of ​​the inner ring 216 and the closed area of ​​the inner ring 216 is 0.2 to 1.0.

[00319] The inner ring 216 encircles the open opening 54 in the first end cap 38, in this example. The inner ring 216 is normally spaced radially from the open opening 54.

[00320] Similarly, the cover portion 210 includes a second hub ring 220 of projections 221 and receivers 222 radially inward to the first hub ring 211. When the cover 28 is engaged against the filter cartridge 34, the sealing member 92 is between the first hub ring 211 and the second hub ring 220. Each of the projections 221 of the second hub ring 220 defines a closed area, and each of the receivers 222 of the second hub ring 220 defines an open area. The ratio between the open area and the closed area of ​​the second hub ring 220 is 1-1.3.

[00321] The numbers of the projections 204, 212, 217, 221 Petition 870250087534, dated 09 / 26 / 2025, pp. 280 / 514 62 / 88 can be the same, different, or some can have the same number while others are different. For example, the number of the outer ring 208 of the projections 204 can be the same as or different from the number of projections 217 of the inner ring 216. Similarly, the number of the first cube ring 211 of the projections 212 can be the same as or different from the number of the second cube ring 220 of the projections 221. The number of projections 204 can be the same as the number of projections 212.

[00322] The amplitude (height) of projections 204, 212, 217, 221 may be equal to each other, different from each other, or some may be equal while others are different. For example, projections 204 and 217 may be equal or different. Projections 212 and 221 may be equal or different.

[00323] The perimeter shapes of projections 204, 212, 217, 221 may be the same as each other, different from each other, or some may be the same while others are different. For example, projections 204, 212, 217, 221 may be gears 230, 232, 234, 236 with a rectangular or generally triangular shape. The shape of receivers 206, 214, 218, 222 may be the same as or different from projections 204, 212, 217, 221, including generally rectangular or triangular shapes. Furthermore, projections 204, 212, 217, 221 and receivers 206, 214, 218, 222 may be wavy, including a sine wave, for example.

[00324] In use, the end cap arrangement 36 of element portion 200 nests with the first ring of hub 211 to rotationally secure the filter cartridge 34 Petition 870250087534, dated 09 / 26 / 2025, pp. 281 / 514 63 / 88 and coverage 28. EXAMPLE OF ANTI-ROTATION ARRANGEMENT 98, FIGURES 34-39

[00325] Figures 34-39 depict another embodiment of a filter assembly 420. The filter assembly 420 includes, in an operable manner, a filter element or cartridge 434 that can be repaired (i.e., removable and replaceable). The filter element or cartridge 434 has a first end 482 and a second opposite end 484.

[00326] An end arrangement 421 is removablely positionable on the filter element 434. In the assembly 420, the end arrangement 421 is a filter head 424. Typically, the filter head 424 will be a cast member, for example, made of cast aluminum or other material.

[00327] The assembly 420 additionally includes a basin / housing 422 with a side wall 430. In use, the side wall 430 extends (hangs down) from the filter head 424. In general, the basin 422 defines an internal volume 432 in which the selected internal components, as defined, are contained and certain filtration and flow operations occur. The basin 422 has an open mouth 427 through which the filter cartridge 434 can be inserted and removed. The open mouth 427 is also the portion of the basin 422 that connects in a releasable manner to the filter head 424. The filter assembly 420 may also be referred to as a basin and cartridge assembly 420.

[00328] The typical filter cartridge 434 additionally includes, as described below, an end cap arrangement 436 at the first end 482, which may be Petition 870250087534, dated 09 / 26 / 2025, page 282 / 514 64 / 88 incorporated as a top cap or first cap 438, which provides a preferred assembly and seal of the repairable filter cartridge 434 to the filter head 424. The second end 484 of the filter cartridge 434 includes a second cap 439.

[00329] The first end cap 438 includes a central opening 454 for the passage of liquid to be directed to or from the filter head 424.

[00330] The 438 end cap can be molded from a variety of moldable plastic materials, for example, a polyamide (PA). For example, a glass-filled polyamide (15-30% glass-filled by weight) is usable. It can also be formed as a metal part.

[00331] Filter cartridge 434 includes filter media 456, sometimes referred to herein as media pack 456. Media 456 may be pleated media 458 contained in a pleated mesh or similar structure, with pleats extending between the first opposite cap 438 and the second end cap 439.

[00332] The media package 456, as shown in the exemplary embodiments, is generally tubular and encloses an open volume. The tubular media package 456 is described as being cylindrical in shape. A central longitudinal geometric axis 490 is centered within the media package 456 and passes through the first end 482 of the cartridge 434 and the second end 484 of the cartridge 434.

[00333] Typical operation of assembly 420 in Figure 34 is generally as follows: Filter head 424 receives fluid Petition 870250087534, dated 09 / 26 / 2025, page 283 / 514 65 / 88 dirty (e.g., oil) from an upstream source. The fluid to be filtered flows to the filter head 424 and then to an unfiltered liquid volume 423, which is the volume between the side wall 430 and the filter medium 456. From there, the fluid passes through the filter medium 456 (referred to herein as the filter flow), which removes dirt and debris from the fluid. The fluid enters a filtered liquid volume 425, which is inside the inner media package 456. From there, the filtered liquid flows through the opening 454 in the first end cap 438 and to the filter head 424. The same exits the filter head 424 for use in the system. The foregoing describes a direct flow operation (from outside to inside). In some cases, the assembly 420 may also operate in a reverse flow operation, in which the flow is from inside to outside.

[00334] The second end cap 439 in Figure 34 is closed. In general, the second end cap 439 can be either closed or open. The assembly 420 in Figure 34 has a valve assembly 426 in the basin 422 opposite the open mouth 427. The valve assembly 426 can be used to drain the water collected from the bottom of the basin 422.

[00335] The filter cartridge 434 includes a sealing member 492 attached to an axial portion 494 of the end cap arrangement 436 within a plane orthogonal to the central longitudinal geometric axis 490. In the example embodiment shown, the sealing member 492 is oriented in the axial portion 494 of the first end cap 438. The sealing member 492 forms a seal between the volume of unfiltered liquid Petition 870250087534, dated 09 / 26 / 2025, pp. 284 / 514 66 / 88 423 and the volume of filtered liquid 425. The sealing member 492 is positioned radially between a radial position of the upstream and downstream ends of the pleated medium 458.

[00336] Assembly 420 includes anti-rotation arrangement 98, provided to minimize or prevent the sealing member 492 from bunching up when the filter cartridge 434 is attached to the filter head 424. The anti-rotation arrangement 98 is similar to the arrangement described previously.

[00337] The anti-rotation arrangement 98 includes a filter element portion 500 (Figures 35 and 38) that is attached or integral to the end cap arrangement 436. Typically, and as shown, the portion 500 of the anti-rotation arrangement 98 in the filter element 434 is an integrally molded part of the first end cap 438.

[00338] As shown in Figure 35, portion 500 of the anti-rotation arrangement 98 is located on the axial portion 94 of the end cap arrangement 436 and adjacent to the sealing member 492. Preferably, the anti-rotation arrangement 98 is located in a position to provide at least some radial support to the axial portion 494. Note that the sealing member 492 is not shown in Figures 35 to 38 for clarity and that the sealing member 492 would be present in an actual installation, as illustrated in Figure 34. In preferred implementations, the sealing member 492 is supported along at least some locations along an inner or outer radial side, or both inner and outer, of the sealing member 492.

[00339] In many preferred implementations, the Petition 870250087534, dated 09 / 26 / 2025, pages 285 / 514 67 / 88 portion of filter element 500 of anti-rotation arrangement 98 is located between sealing member 492 and an outer periphery 570 or edge of end cap arrangement 436.

[00340] In the example shown, the filter element portion 500 of the anti-rotation arrangement 98 is along the outer periphery 570 of the first end cap 438. The filter element portion 500 of the anti-rotation arrangement 98 may include a plurality of projections 504. The projections 504 may be separated by receivers 506. The projections 504 and the receivers 506 form an outer ring 508 that circumscribes the sealing member 492. When positioned here, the projections 504 are positioned to provide at least some radial support to the sealing member 492, especially when the filter element 434 has filter flow from inside the filter medium 456 to outside the filter medium 456. If the filter flow were reversed (i.e., from outside to inside), the projections 504 would be provided in a ring within the sealing member 492.

[00341] Although many modalities are possible, each of the 504 projections of the outer ring 508 defines a closed area, while each of the 506 receptors of the outer ring 508 defines an open area. A ratio between the open area and the closed area of ​​the outer ring 508 is 0.2-1.0

[00342] Part of the antirotation arrangement 98 may include a portion of the filter head 510 (Figure 39). The filter head portion 510 includes a first cube ring 511 of projections 512 and receivers 514. Each of the projections 512 of the first cube ring 511 defines a closed area, Petition 870250087534, dated 09 / 26 / 2025, page 286 / 514 68 / 88, while each of the 514 receivers of the first 511 cube ring defines an open area. The ratio between the open area of ​​the first 511 cube ring and the closed area of ​​the first 511 cube ring is 1-1.3.

[00343] In many examples, the projections associated with element portion 500 are received by the receptors in head portion 510, while the projections associated with head portion 510 are received by the receptors in element portion 500. For example, and as illustrated, receptors 506 / 514 in element portion 500 and in head portion 510 are positioned and sized to receive projections 504 / 512 in element portion 500 and in head portion 510. However, the fit does not need to be exact, and receptors 506, 514 may have a larger size, shape, and area when compared to projections 504, 512, for example, as illustrated later in Figures 55-66. Together, projections 504, 512 and receptors 506, 514 define a projection and receptor arrangement.

[00344] In exemplary embodiments, projections 504, 512 are circumferentially spaced with receptors 506, 514 between them. In some cases, projections 504, 512 alternate uniformly with receptors 506, 514, as described later in relation to Figure 51.

[00345] In preferred embodiments, the filter element portion 500 additionally includes an inner ring 516 with projections 517 and receivers 518 radially into the sealing member 492, such that the sealing member 492 Petition 870250087534, dated 09 / 26 / 2025, page 287 / 514 69 / 88 is positioned between the outer ring 508 and the inner ring 516. The inner ring 516 and the outer ring 508 are oriented on the axial surface 94 of the first end cap 438 oriented away from the media package 56. Each of the projections 517 of the inner ring 516 defines a closed area, and each of the receivers 518 of the inner ring 516 defines an open area. The ratio between the open area of ​​the inner ring 516 and the closed area of ​​the inner ring 516 is 0.2-1.0.

[00346] The inner ring 516 encircles the open opening 454 in the first end cap 438, in this example. The inner ring 516 is normally spaced radially from the open opening 454.

[00347] Similarly, the head portion 510 includes a second hub ring 520 with projections 521 and receivers 522 radially inward to the first hub ring 511. When the filter head 424 is engaged against the filter cartridge 434, the sealing member 492 is between the first hub ring 511 and the second hub ring 520. Each of the projections 521 of the second hub ring 520 defines a closed area, and each of the receivers 522 of the second hub ring 520 defines an open area. The ratio between the open area and the closed area of ​​the second hub ring 520 is 11.3.

[00348] The number of projections 504, 512, 517, 521 may be the same, different, or some may have the same number while others are different. For example, the number of projections 504 of the outer ring 508 may be the same as or different from the number of projections 517 of the inner ring 516. Petition 870250087534, dated 09 / 26 / 2025, pp. 288 / 514 70 / 88 Similarly, the ring number of the outer cube 511 of the projections 512 may be the same as or different from the ring number of the inner cube 520 of the projections 521. The number of the projections 504 may be the same as the number of the projections 512.

[00349] The amplitude (height) of the projections 504, 512, Projections 517 and 521 can be the same, different, or some can have the same height while others are different. For example, projections 504 and 517 can be the same or different. Projections 512 and 521 can be the same or different.

[00350] The perimeter shapes of projections 504, 512, 517, 521 may be the same as each other, different from each other, or some may have the same shape while others are different. For example, projections 504, 512, 517, 521 may be teeth or gears with a variety of shapes, generally including triangular, rectangular, wavy (including sine wave, etc.). The shapes of receivers 506, 514, 518, 522 may be the same as or different from projections 504, 512, 517, 521.

[00351] In use, the end cap arrangement 436 of the element portion 500 nests with the outer hub ring 511 to rotationally secure the filter cartridge 434 and the filter head 424. TANK FILTER ASSEMBLY, FIGURES 40-43

[00352] Another embodiment is illustrated in Figures 4043 as a filter assembly in tank 600, including a tank 602 with filter head 604 and removable lid 606. A filter cartridge 610 can be seen in Figure 41 assembled from Petition 870250087534, dated 09 / 26 / 2025, p. 289 / 514 71 / 88 operational form within tank 602 and connected to filter head 604 and cover 606. The filter assembly in tank 600 is similar to assembly 20 in Figure 5 and a description of the features is not repeated here, but is incorporated for reference.

[00353] The filter assembly 600 includes the axially mounted sealing member 92 (Figures 42, 43) and includes an anti-rotation arrangement 98, provided to minimize or prevent the sealing member 92 from bunching up when the filter cartridge 610 is attached to the filter head 604. The anti-rotation arrangement 98 is similar to the arrangements described previously. Thus, the anti-rotation arrangement 98 includes, in the filter cartridge 610: alternating projections 204 and receivers 206 forming the outer ring 208; and inner ring 216 of projections 217 and receivers 218 radially into the sealing member 92 so that the sealing member 92 lies radially between the outer ring 208 and the inner ring 216. In the filter cover 606, the anti-rotation arrangement 98 includes: first hub ring 211 of alternating projections 212 and receivers 214; and second hub ring 220 (Figures 18, 19) of projections 221 and receivers 222 (Figures 18, 19).

[00354] In Figure 43, each of the projections 204, 212, 216, 221 and the receivers 206, 212, 214, 218 are represented as generally triangular in shape. Other shapes are possible. Note that in Figure 43, certain components, such as the spring, are not shown for illustrative purposes. EXAMPLE OF A METHOD FOR CONNECTING A SET OF Petition 870250087534, dated 09 / 26 / 2025, pp. 290 / 514 72 / 88 FILTER

[00355] The above components can be used in a method of connecting a filter assembly to a filter end arrangement. The filter end arrangement can be a filter head or filter cap. The filter assembly includes a filter cartridge mounted removablely in a housing and has a plurality of cartridge projections and receivers positioned to engage the filter end arrangement. The filter end arrangement has a plurality of end arrangement projections and receivers positioned to engage the filter cartridge. The method includes positioning the cartridge projections to be at least partially received within the end arrangement receivers, allowing the filter cartridge to move axially toward the end arrangement.After the filter cartridge moves axially toward the end arrangement, a thread in the housing engages with a thread in the end arrangement. The method further includes rotating the housing relative to the end arrangement to connect the filter assembly to the filter end arrangement.

[00356] In another exemplary method, the filter assembly includes a filter cartridge mounted removablely in a housing and has a sealing member configured for attachment to a filter end arrangement with a plurality of end arrangement projections positioned to radially support the filter cartridge sealing member. The method includes positioning the member Petition 870250087534, dated 09 / 26 / 2025, pp. 291 / 514 73 / 88 cartridge sealing to be at least partially received by the end arrangement projections, allowing the filter cartridge to move axially toward the end arrangement. After the filter cartridge moves axially toward the end arrangement, a thread in the housing is engaged with a thread in the end arrangement. The method additionally includes rotating the housing relative to the end arrangement to connect the filter assembly to the filter end arrangement.

[00357] This method is useful for ensuring that the projections / receivers on the filter cartridge engage the receivers / projections on the filter head or cover before the corresponding threads engage. Such an arrangement will minimize the likelihood of the projections on the filter cartridge and the head or cover becoming entangled and jammed.

[00358] Examples of preferred arrangements are schematically represented in Figures 44-46. In these representations, the filter head or cover is shown in 702, with threads or threaded section 704, and a plurality of projections 706 with free-end tips 708. The cartridge is shown in 710, oriented removable in a housing or basin 712. The housing or basin 712 has threads or threaded section 714. The cartridge 710 has a plurality of projections 716 with free-end tips 718.

[00359] Dimension D1 is the distance measured from the starting point of the threaded section 714 in the housing / basin 712 to the free-end tips 718 of the cartridge projections 716. Dimension D2 is the distance measured from the starting point of the section Petition 870250087534, dated 09 / 26 / 2025, pp. 292 / 514 74 / 88 threaded 704 from the filter head / cover 702 to the free end tips 708 of the projections 706.

[00360] In order to reduce or minimize the possibility of end-to-end jamming or jamming of opposite ends 708, 718 during installation, the projections can be arranged so that the ends 708, 718 are moved axially over each other before engagement or contact of the threads 704, 718. Such an arrangement can be achieved by making D1 unequal to D2, so that an axial overlap distance D3 results between the ends 708, 718 when the ends of the threads 704, 718 are confined but not yet engaged. For example, in Figure 44, a configuration is shown in which the projections 716 on the cartridge 710 are embedded in the basin / housing 712, wherein D1 is about 2.23 cm (0.88 in) and is smaller than D2, which is about 2.36 cm (0.93 in). In another example, in Figure 45, a configuration is shown in which the projections 706 are embedded in the filter head / cover 702, wherein D1 is about 2.31 cm (0.91 in) and is larger than D2, which is about 0.78 in.In another example, Figure 46 shows a configuration in which projections 706, 716 are positioned within a threaded region of the filter head / cap 702, where D1 is about 0.78 cm (0.31 in.), and is larger than D2, which is about 0.66 cm (0.26 in.). With the above arrangements, the resulting overlap distance D3, which is the difference between D1 and D2, varies from 0.12 cm (0.05 in.) to 0.33 cm (0.13 in.). However, other overlap distances are possible. ALTERNATIVE DISPLACEMENT ARRANGEMENT AND MEMBERS OF Petition 870250087534, dated 09 / 26 / 2025, pp. 293 / 514 75 / 88 EXTENSION OF FIGURES 47-50

[00361] With reference to Figures 47-50, an arrangement is presented using an alternatively configured offset arrangement 72 and extension members 141. The features of the arrangements in Figures 47-50 are shown primarily in relation to the filter set embodiment illustrated in Figures 34-46, but are not so limited and can also be used with the other embodiments disclosed in this document.

[00362] As shown in Figures 47-50, and as illustrated in other embodiments disclosed herein, the end construction 151 includes a plurality of spaced, axially extensible extension members 141 that are contiguous with the displacement arrangement 72. In some characterizations, the extension members 141 may be collectively referred to as forming a castellated, crenellated, and / or crenellated shape. When the filter element 34 associated with the displacement 72 and the housing 22 associated with the extension members 141 are fully assembled together, open spaces or passages are formed between the end of the displacement arrangement 72 and the adjacent extension members 141. With such an arrangement, diversion flow and drainage flow from the housing are permitted through these open spaces.However, in contrast to other embodiments disclosed previously, the extension members 141 are provided with a terminal end 158 that includes a step feature instead of the flat configuration shown previously. This step feature interacts. Petition 870250087534, dated 09 / 26 / 2025, pp. 294 / 514 76 / 88 cooperatively with a similarly shaped step feature located at a terminal end 81 of the offset arrangement 72. As more easily visualized in Figure 49, the terminal end 158 is provided with axially facing surfaces 158a, 158c and radially inward facing surfaces 158b, 158d forming a first stepped profile, while the terminal end 81 is provided with axially facing surfaces 81a, 81c, 81e and radially outward facing surfaces 81b, 81d forming a second stepped profile cooperatively. With such an arrangement, the first and second stepped profiles can fit or couple in such a way that surfaces 81a / 158a and 81c / 158c and 81b, 158b are contiguous to form a secure radial and axial connection.Furthermore, surface 81d, which is shown as being provided with a slight taper, has the capability to act as a guide feature in the initial installation, providing an oblique surface that can interact with the corner formed by surfaces 158c, 158d to center or locate the filter element 34 in relation to the housing 22, so that the first and the stepped profiles can be readily engaged in a junction 83. Note that the stepped profiles can be alternated between component parts, so that the terminal end 81 is provided with radially inward-facing surfaces facing radially outward faces provided on the terminal end 158.

[00363] In one aspect, the first and second profiles Petition 870250087534, dated 09 / 26 / 2025, pp. 295 / 514 The staggered 77 / 88, through their engagement together, ensure that the filter element 34 is precisely located or centered in relation to the housing 22. This feature, therefore, advantageously ensures that the ramp surface 86 of the displacement arrangement 72 is fully aligned with a ramp surface 141a of the extension members around the entire outer circumference of the displacement arrangement 72. As the spring 70 initially slides along the ramp surface 86 and then transitions to sliding along the ramp surface 141a during installation, it is beneficial to avoid a condition where any part of the end-end surface 158a is exposed or radially outward from the displacement arrangement 72. Otherwise, this exposed part could undesirably act as a catch or contiguity surface against the axial end of the spring 70, even if the filter element 34 has been correctly installed in the housing 22.Note that ramp surface 141a can be inserted radially from ramp surface 86 to avoid such a potential condition, instead of being perfectly aligned with ramp surface 86. It is also noted that the angles of ramp surfaces 86 and 141a can be equal or different. While the first and second stepped profiles include two axial surfaces and one radial surface to essentially form a single step arrangement, additional axial and radial surfaces can be provided to result in a multi-step profile. Furthermore, it is also possible that only some of the extension members 141 are endowed with a stepped profile. Petition 870250087534, dated 09 / 26 / 2025, pp. 296 / 514 78 / 88 while others are provided with a flat end surface or another axial surface at a relatively lower height. For example, an arrangement may be provided in which some extension members have the profile shown in Figure 49 while others are provided only with axial surface 158c, or an even lower surface, defining the terminal end of the extension members. Projection and geometry of receiver arrangement and other examples from Figures 51-66

[00364] As discussed above, the filter cartridge projections 204, 217, 504, 517, 716; filter cartridge receivers 206, 218, 506, 518; filter head or cover projections 212, 221, 512, 521, 706; and filter head or cover receivers 214, 222, 514, 522 may be provided with a variety of shapes and arrangements beyond those already revealed in Figures 1-46. Figures 47 to 58 illustrate only some of these possible variations in which the filter cartridge projections P1, filter cartridge receivers R1, filter head or cover projections P2, and filter head or cover receivers R2 are schematically presented and usable with any of the projections and receivers shown and described herein. For illustrative purposes, these figures are presented as partial, planar diagrams of the projections and receptors.

[00365] Although many examples are described and revealed here, it is observed that some arrangements and configurations may be more preferable or include certain advantages, at least for certain Petition 870250087534, dated 09 / 26 / 2025, pp. 297 / 514 79 / 88 installations. For example, configurations that include projections with sharp edges can minimize surface contact and beneficially reduce projection-to-projection bonding during installation. Additionally, projection and receiver sidewalls with relatively steep sidewalls can induce near-vertical compression, while sidewalls with relatively shallower sidewalls can help facilitate alignment between the two opposing pieces. In some configurations, symmetrical projections and receivers with an open-to-closed area ratio close to 1 are advantageous for assisting in mesh generation and reducing projection bonding during installation. For a given projection receiver design, these aspects can be balanced to achieve a system with optimal performance.

[00366] As previously indicated, the projections and receivers of the filter cartridge and filter head or cover can define closed and open areas, respectively. Figure 51 schematically presents these characteristics as A-P1 and A-R1 for the filter cartridge F and as A-P2 and A-R2 for the filter head or cover H. A sealing support surface S1 is also schematically illustrated for the filter cartridge F. In some of the examples described above, the ratio between the open area of ​​the filter cartridge receiver and the closed area of ​​the filter cartridge projection, which can be characterized as A-R1 to A-P1, is 0.4 to 1.6. However, Petition 870250087534, dated 09 / 26 / 2025, pp. 298 / 514 80 / 88 other ranges are possible. For example, the ratio of AR1 to A-P1 for the inner and / or outer ring could be, for example, a ratio of 0.2 to 1.8; a ratio of 0.7 to 1.8; a ratio of 0.8 to 1.0; a ratio of 1 to 1.8; a ratio of 1 to 1; a ratio greater than 1; or a ratio less than 1. In some of the examples described above, the ratio between the filter head or the open area of ​​the cap receiver and the filter head or the closed projection area of ​​the cap, which can be characterized as being A-R2 to A-P2, is 0.48 to 1.5. However, other ranges are possible. For example, the ratio of A-R2 to A-P2 for the inner and / or outer ring could be, for example, a ratio of 1 to 1.3; a ratio of 0.2 to 1.7; a ratio of 0.97 to 0.98; a ratio of 1 to 1; a ratio greater than 1; or a ratio less than 1.In some configurations, symmetrical projections and receivers with a ratio close to 1.0 are advantageous to assist in mesh generation and reduce the connection between projections P1 and P2 during installations.

[00367] With reference to Figure 52, a diagram is presented illustrating the portions of the sealing surface S1 and / or the seal supported thereon that are supported or unsupported in a radial direction by the projections P1 of one or both of the outer ring OU and the inner ring IR. As shown in Figure 52, the sealing support surface S1 is radially supported by each of the projections P1 over a length L1 and is unsupported by each of the projections P1 over a length L2, wherein the sum of the lengths L1, Petition 870250087534, dated 09 / 26 / 2025, pp. 299 / 514 81 / 88 L2 is equal to the length between a common point between adjacent projections P1. Figure 52 also shows an angle a1 representing the angle between the side walls of the illustrated projections P1 and a plane orthogonal to the longitudinal geometric axis of the filter cartridge. In some examples, L1 and L2 are generally equal to each other. In some examples, L1 is greater than L2. In some examples, L2 is greater than L1. The ratio between the unsupported length L2 and the supported length L1 on the filter element may be between about 0.05 and 1.5 in some examples, between about 0.1 and 1.3 in some examples, and / or between about 0.2 and 0.9 in some examples. The ratio between the unsupported length L2 and the supported length L1 on the cap or head side may be between about 0.1 and 1.4 in some examples, between about 0.2 and 1.2 in some examples, and / or between about 0.4 and 0.8 in some examples. In some examples, angle a1 is between 30 degrees and 75 degrees.In some examples, angle a1 is approximately 60 degrees. In some examples, angle a1 is approximately 45 degrees.

[00368] Referring to Figures 53 and 54, a schematic view of the top plane of examples of projection and receiver arrangements in a filter cartridge showing an outer ring OR with projections P1 and receivers R1, an inner ring IR with projections P1 and receivers R1, and a sealing support surface S1 disposed between them. With this view, it can be seen that the supported length L1 corresponds to a radial angle a2, the unsupported length L2 corresponds to a radial angle a3, and the total length L3 corresponds to Petition 870250087534, dated 09 / 26 / 2025, pp. 300 / 514 82 / 88 a radial angle a4. As with L1 and L2, in some examples a2 and a3 are equal, in some examples a2 is greater than a3, and in some examples a3 is greater than a2. The ratio between the unsupported length angle a3 and the supported length angle a2 on the filter element and the cap or head can be between about 0.25 and 1.75 in some examples, between about 0.5 and 1.5 in some examples, and / or about 1 in some examples. In the example shown in Figure 53, the peaks of the P1 projections associated with the inner and outer rings IR, OR are radially aligned with each other, while in Figure 54, the peaks of the projections of the inner ring OR are offset by an angle a5 from the peaks of the P1 projections of the outer ring OR. In one example, the angle a5 varies from 0 to 30 degrees. In some examples, a5 is equal to half the angle a4 so that the peaks of the inner ring IR projections are radially aligned with the troughs of the outer ring OR receptors R1.In other words, the peaks of the inner ring IR P1 projections are radially aligned halfway between the adjacent peaks of the outer ring OR P1 projections.

[00369] With reference to Figures 55 to 66, additional example configurations for the projections and receivers are illustrated. In Figure 55, an example is given in which the number of projections and receivers P1, R1 of the filter cartridge F does not coincide with the number of projections and receivers P2, R2 for the filter head or cap H. In the specific example shown, the number of projections and receivers P1, R1 is less than the number of projections and receivers P2, R2, but the reverse is also possible. Petition 870250087534, dated 09 / 26 / 2025, pp. 301 / 514 83 / 88

[00370] With reference to Figure 56, an example is given in which the P1 projections and R2 receivers have a different shape compared to the P2 projections and R1 receivers. In the example shown, the P1 projections and R2 receivers have a triangular shape, while the P2 projections and R1 receivers have a trapezoidal shape. The reverse configuration is also possible, as are many other combinations.

[00371] With reference to Figures 57 to 60, further examples of possible shapes for the projections and receivers are provided. Figure 57 shows an example where projections P1, P2 and receivers R1, R2 have a trapezoidal shape. Figure 58 shows an example where projections P1, P2 and receivers R1, R2 have a curved, wavy, or sinusoidal shape. Figure 59 shows an example where projections P1, P2 and receivers R1, R2 have a rectangular shape. Figure 60 shows an example where projections P1, P2 and receivers R1, R2 have a rectangular shape with pointed ends. Rounded ends can also be provided. Other configurations and shapes are possible.

[00372] With reference to Figure 61, a configuration is shown in which the projections P1, P2 and the receivers R1, R2 are asymmetrically shaped. In the example shown, the projections and receivers have a sawtooth shape. Other configurations and shapes are possible.

[00373] With reference to Figure 62, a configuration is shown in which the adjacent projections P1, P2 and the Petition 870250087534, dated 09 / 26 / 2025, pp. 302 / 514 84 / 88 receivers R1, R2 are different from each other. In the example shown, the projections and receivers have three triangles of different sizes and shapes that have different circumferential widths and different axial lengths or depths. More or less different shapes and / or sizes can be provided and can be provided in a repetitive pattern or in no specific pattern to result in a rotational symmetry that ranges from single-fold rotational symmetry to as many orders of symmetry as desired.

[00374] With reference to Figures 63 and 64, configurations are shown in which the sealing support surface S1 is provided at an oblique angle to the longitudinal geometric axis of the filter cartridge F. Figure 63 shows a configuration in which the projections and receivers remain arranged along a plane orthogonal to the longitudinal geometric axis of the filter cartridge, while Figure 64 shows a configuration in which the projections and receivers are also oriented at an oblique angle to the longitudinal geometric axis. With such an arrangement, the sealing surface of the filter head would be angled or similarly arranged so that a proper seal is formed with the obliquely oriented sealing member supported by the sealing surface S1.

[00375] With the configurations shown in Figures 62 to 65, it may be that the filter cartridge F can only be received by the cover or head H in a limited number of rotational positions or even only in a single rotational position. In these cases, the filter cartridge F and / or the Petition 870250087534, dated 09 / 26 / 2025, pp. 303 / 514 The 85 / 88 cover or the H-head may be provided with rotational alignment features, including those of the type known in the art. For example, alignment features of the type shown and described in U.S. Patent 11,839,842, entitled Liquid Filter Assemblies; Features; Components; and Methods, and issued December 12, 2023, may be incorporated into the filter assemblies disclosed herein. U.S. Patent No. 11,839,842 is incorporated herein by reference in its entirety.

[00376] Referring to Figure 65, another example is provided where at least part of the seal bearing surface is provided at an oblique angle to the longitudinal geometric axis of the filter cartridge. In this example, the seal bearing surface S1 is provided with an axially deviated wavy or sinusoidal shape. Consequently, a seal mounted on the seal bearing surface S1 would also have a similar shape. The opposite surface on the filter head against which the sealing member forms a seal would also have a similar shape. Note that the engagement between projections P1, P2 ensures that the filter cartridge F can only be installed in one of several predefined angular orientations, so that the wavy sealing member always aligns with the wavy sealing surface on the filter head to form a proper seal.In the example shown, the peaks of the sealing support surface S1 are aligned with the receivers R1, but they can be arranged to align with them. Petition 870250087534, dated 09 / 26 / 2025, pp. 304 / 514 86 / 88 peaks of the P1 projections. In the example shown, the fence support surface S1 has a number of peaks that is equal to the number of P1 projections, but it may have more or fewer peaks. In the example shown, the fence support surface has a uniform wavy profile, but it may also have an irregular or asymmetrical profile.

[00377] Referring to Figure 66, an example is provided illustrating that the projections of the filter element F can have different sizes and shapes relative to the receivers. In one aspect, the projections of the filter element P1 have a maximum width W1 and maximum height H1 to define a first area A1, while the receivers R2 of the cap or head H have a width W2 and height H1 to define an area A2. In the example shown, the height H1 is less than the height H2, while the width W1 is less than the width W2 and the area A1 is less than the area A2. In some examples, the heights H1 and H2 are generally equal, while the width W1 is less than the width W2, resulting in an area A1 smaller than the area A2. In some examples, the widths W1 and W2 are generally equal, while the height H1 is less than the height H2, resulting in an area A1 smaller than the area A2. As illustrated in Figure 66, the projections P1 can have a similar or different shape from the receivers.For example, the left side of Figure 66 shows triangular projections P1 and R1, while the right side of Figure 66 shows rounded P1 projections and triangular R1 receptors. Many other possible combinations of receptors of different shapes R1 and P1 projections are possible, provided the area... Petition 870250087534, dated 09 / 26 / 2025, pp. 305 / 514 87 / 88 The area A1 of the projections P1 remains smaller than the area A2 of the receivers R1, provided that the perimeter or boundary edges of the receivers R1 are able to circumscribe the perimeter or boundary edges of the projections P1. In some examples, the ratio of A1 to A2 is between 0 and 1, between 0.25 and 0.75, and about 0.5. In another aspect, the sealing material SM can be characterized as having an unsupported area A3 defined as the area of ​​the sealing material SM not covered or adjacent to the projections P1. In some examples, a ratio between the area A3 and the total radial surface area of ​​the sealing member SM, on the side of the projections P1, may be between 0 and 1, between 0.25 and 0.75, and about 0.5.When the ratio is 1, all support for the SM sealing material is provided by the P2 projections associated with the cap or head H, as such a configuration would exist in which the P1 projections are not provided or do not overlap the SM sealing material. Although configurations in which the P1 projections have a smaller area than the corresponding R2 receivers, or in which the P1 projections are not provided or are provided in a location where they do not support the sealing member, result in less radial support for the SM sealing material in an installed condition, such arrangements may still be satisfactory for certain installation and operating conditions. Furthermore, an advantage of providing P1 projections that have a smaller area than the corresponding R2 receivers is that the initial alignment between the filter element and the cap or head is less precise. Petition 870250087534, dated 09 / 26 / 2025, pp. 306 / 514 88 / 88 may be necessary.

[00378] The above represents exemplary principles. Many modalities can be created using these principles. Petition 870250087534, dated 09 / 26 / 2025, pp. 307 / 514

Claims

1 / 18 CLAIMS 1. Filter assembly characterized in that it comprises: (a) a filter element having a filter medium; (b) a removable and positionable end arrangement on the filter element; (c) a first contiguity member and a second contiguity member capable of contiguity when the assembly is in a first condition and prevented from contiguity when the assembly is in a second condition; and (d) a transition device that allows the filter assembly to transition between the first and second conditions.

2. Filter assembly according to claim 1, characterized in that the first contiguous member includes a radially flexible member.

3. Filter assembly according to claim 2, characterized in that the first contiguous member includes an axially rigid member.

4. Filter assembly, according to any one of claims 2-3, characterized in that the transition arrangement is mechanically associated with the filter element.

5. Filter assembly according to claim 3, characterized in that the first contiguous member includes a spiral spring and / or a flat spring and / or a clock spring. Petition 870250087534, dated 09 / 26 / 2025, p. 308 / 514 2 / 18 6. Filter assembly according to claim 5, characterized in that the first contiguous member is a flat spring molded to form a partial housing.

7. Filter assembly, according to any one of claims 4-6, characterized in that the transition arrangement includes a ramp in the filter element.

8. Filter assembly according to claim 7, characterized in that the filter element has a first end and a second opposite end, and the ramp arrangement projects radially from the first end.

9. Filter assembly according to claim 8, characterized in that the ramp arrangement is configured to radially adjust the radially flexible member when forced against the ramp arrangement in a direction from the first end to the second end.

10. Filter assembly, according to any one of claims 2-9, characterized in that the first condition includes the radially flexible member with a first outermost dimension, and the second condition includes the radially flexible member with a second outermost dimension, wherein the first outermost dimension is smaller than the second outermost dimension.

11. Filter assembly, according to any one of claims 2-9, characterized in that the first condition includes the radially flexible member with a first outermost dimension, and the second condition includes the radially flexible member with a second outermost dimension, wherein the first outermost dimension is larger than the second outermost dimension.

12. Filter assembly, according to any one of claims 1-8, characterized in that the first contiguous member is connected to the end arrangement.

13. Filter assembly, according to any one of claims 1-12, characterized in that the end arrangement is of a filter head or a cover.

14. Filter assembly, according to any one of claims 1-13, characterized in that the transition arrangement radially adjusts the first contiguous member to avoid contiguity of the first contiguous member with the second contiguous member.

15. Filter assembly according to claim 14, characterized in that the second contiguous member is part of a housing arrangement dimensioned to receive the filter element.

16. Filter assembly according to claim 15, characterized in that the housing arrangement includes a filter arrangement with an open interior, the open interior constructed and arranged to receive the filter element.

17. Filter assembly according to claim 16, characterized in that the filter arrangement has a first end cap, wherein Petition 870250087534, dated 09 / 26 / 2025, page 310 / 514 4 / 18 first end cap includes the second contiguous member.

18. Filter assembly according to claim 15, characterized in that the housing arrangement includes a filter basin with an open interior, the open interior being constructed and arranged to receive the filter element.

19. Filter assembly according to claim 10, characterized in that the first contiguous member is connected to the end arrangement.

20. Filter assembly characterized in that it comprises: (a) an end arrangement; (b) a first contiguous member in the radially movable filter assembly; and (c) a filter cartridge comprising: (i) a bundle of tubular media defining an open support interior, the bundle of tubular media having a first end and an opposite second end; (ii) a central longitudinal geometric axis centered on the bundle of tubular media and passing through the first end and the second end; and (iii) a displacement member dimensioned and positioned to engage against the first contiguous member to move the first contiguous member radially when the filter cartridge is connected to the end arrangement. Petition 870250087534, dated 09 / 26 / 2025, p. 311 / 514 5 / 18 21. Filter assembly according to claim 20, characterized in that the displacement member includes a ramp arrangement.

22. Filter assembly according to claim 20, characterized in that the displacement member includes an incorporated hinge that rotates against the first contiguous member.

23. Filter assembly according to claim 21, characterized in that the ramp arrangement includes a ramp surface with a non-zero angle and not perpendicular to the longitudinal geometric axis.

24. Filter assembly according to claim 23, characterized in that the surface of the ramp is angled between 5 and 80 degrees.

25. Filter assembly according to claim 23, characterized in that the surface of the ramp is angled between 15 and 70 degrees.

26. Filter assembly according to claim 23, characterized in that the surface of the ramp is angled approximately 20 to 30 degrees.

27. Filter assembly according to any one of claims 23-26, characterized in that: (a) the filter cartridge has a first end cap fixed to the first end of the tubular media package; and (b) the ramp surface is an integral part of the first end cap. Petition 870250087534, dated 09 / 26 / 2025, p. 312 / 514 6 / 18 28. Filter assembly, according to claim 27, characterized in that the first end cap has an external radial surface that defines the ramp surface.

29. Filter assembly according to claim 27, characterized in that the ramp surface has a free leading end and a trailing end; (a) the free leading end projecting axially away from a remaining part of the filter cartridge; and (b) the trailing end being along an outer periphery of the first end cap.

30. Filter assembly according to any one of claims 20-29, characterized in that the end arrangement includes a filter head and a cover arrangement, the filter head having: (a) a wall surrounding an open interior and fluid channels; and (b) a first attachment arrangement along the wall, the wall having first and second opposite ends, each of the first and second ends being open.

31. Filter assembly according to claim 30, characterized in that the end cover arrangement is dimensioned to be positioned removablely inside the filter head, the cover arrangement including: Petition 870250087534, dated 09 / 26 / 2025, page 313 / 514 7 / 18 (i) a central bowl that encloses a fluid conduit communicating with the fluid channels of the filter head; (ii) a second fastening arrangement constructed and arranged for removable connection with the first fastening arrangement; wherein, when the cover arrangement is positioned over the filter cartridge, the displacement member moves the first contiguous member radially to allow the second fastening arrangement of the cover arrangement to connect to the first fastening arrangement of the filter head.

32. Filter assembly, according to any one of claims 20-29, characterized in that the end arrangement includes a filter head, wherein the filter head has: (a) a wall surrounding an open interior and fluid channels; and (b) a first attachment arrangement along the wall, the wall having first and second opposite ends, the second end being open and dimensioned to connect to a filter basin.

33. Filter assembly, according to claim 32, characterized in that it additionally includes a filter basin with an open interior, the open interior constructed and arranged to receive the filter element, the filter basin with a second arrangement of removable fasteners connecting to the first arrangement of fasteners.

34. Filter assembly, according to any one of claims 20-29, characterized in that: (a) the filter cartridge includes a sealing member positioned so as to form a seal with the end arrangement; and (b) the first end cap has an external axial surface holding the sealing member.

35. Filter assembly, according to any one of claims 27-30 and 34, characterized in that the first end cap is an open end cap.

36. Filter assembly, according to any one of claims 27-30, 34 and 35, characterized in that the filter cartridge additionally includes a second end cap fixed to the second end of the tubular media package.

37. Filter assembly according to claim 36, characterized in that the second end cap is a closed end cap.

38. Filter assembly according to claim 36, characterized in that the second end cap is an open end cap.

39. Filter assembly, according to any one of claims 35-38, characterized in that: (a) the tubular media package is an inner tubular media package; and (b) the filter cartridge additionally includes an outer tubular media package radially spaced and encircling the inner tubular media package.

40. Filter assembly according to claim 39, characterized in that: (a) the inner tubular media bundle is composed of pleated media; and (b) the outer tubular media bundle is composed of pleated media.

41. Filter assembly according to any one of claims 39 and 40, characterized in that: (a) the outer tubular media bundle has a first end and an opposite second end; and (b) the first end cap is attached to the first end of the outer tubular media bundle.

42. Filter assembly according to claim 41, characterized in that: (a) the inner tubular media bundle has a greater axial length than the outer tubular media bundle; and (b) the first end of the inner tubular media bundle is closer to the cover arrangement than the first end of the outer tubular media bundle.

43. Filter assembly, according to any one of claims 40-42, characterized in that the filter cartridge additionally includes an outer coating around the outer tubular media package, the outer coating extending between the first end cap and the second end cap.

44. Filter assembly, according to any one of claims 20-43, characterized in that the first contiguous member is fixed to the end arrangement.

45. Filter assembly according to claim 44, characterized in that the first contiguous member circumscribes a central cube in the end arrangement.

46. ​​Filter assembly according to claim 45, characterized in that the first contiguous member comprises an axially rigid and radially flexible spring that moves radially in response to the force against the spring by the displacement member.

47. Filter assembly, according to claim 46, characterized in that the first contiguous member comprises a flat spring that moves radially when engaged against the ramp surface and when free from contact with the ramp surface.

48. Filter assembly according to any one of claims 46 and 47, characterized in that: (a) the end arrangement includes a cover arrangement with a plurality of posts projecting from the central hub; and (b) the spring is slidably mounted on the plurality of posts.

49. Filter assembly according to any one of claims 46 and 47, characterized in that: Petition 870250087534, dated 09 / 26 / 2025, p. 317 / 514 11 / 18 (a) the end arrangement includes a filter head with a surrounding wall with a plurality of posts projecting from the surrounding wall into the filter head; and (b) the spring is slidingly mounted on the plurality of posts.

50. Filter assembly according to claim 33, characterized in that the cover arrangement includes: (a) a closed cover element with an outer radial surface defining the second fastening device; (b) a sealing ring spaced axially from the cover member, the sealing ring holding a radially oriented sealing member positioned to form a seal with the filter head; (i) the sealing ring having a first axial surface and a second opposite axial surface, the first axial surface being oriented towards the cover member; and (c) the central hub extending from the second axial surface.

51. Filter assembly, according to claim 50, characterized in that the central hub has an outer diameter of 50 to 80% of the outer diameter of the sealing ring.

52. Filter assembly, according to any one of claims 50 and 51, characterized in that the radially oriented sealing member of the sealing ring is directed outwards.

53. Filter assembly, according to either of claims 32 and 33, characterized in that the first fastener arrangement and the second fastener arrangement are threaded.

54. Filter assembly, according to any one of claims 20-53, characterized in that: (a) the first contiguous member is radially movable between an innermost position and an outermost position; the innermost position having a dimension D1 and the outermost position having a dimension D2; (b) the ratio of D1:D2 is between 0.74 and 0.

98.

55. Filter cartridge characterized in that it comprises: (a) a tubular media bundle defining an open media interior, the tubular media bundle having a first end and an opposite second end; (b) a central longitudinal geometric axis centered in the interior of the tubular media bundle and passing through the first end and the second end; and (c) a displacement device fixed to the media bundle, including at least one engagement projection with a leading edge and a trailing edge.

56. Filter cartridge, according to claim 55, characterized in that the leading edge is closer to the central longitudinal geometric axis than to the trailing edge. Petition 870250087534, dated 09 / 26 / 2025, pp. 319 / 514 13 / 18 57. Filter cartridge, according to claim 55, characterized in that the trailing edge is closer to the central longitudinal geometric axis than to the leading edge.

58. Filter cartridge, according to any one of claims 55-57, characterized in that the displacement arrangement comprises a plurality of engagement projections.

59. Filter cartridge, according to any one of claims 55-58, characterized in that the tubular media package is cylindrical.

60. Filter cartridge, according to any one of claims 55-59, characterized in that a straight line extending between the leading edge and the trailing edge for at least one or a plurality of engagement projections is angled at a non-zero angle and not perpendicular to the longitudinal geometric axis.

61. Filter cartridge, according to claim 60, characterized in that the straight line extending between the leading edge and the trailing edge is angled between 5 to 80 degrees; or 15 to 70 degrees; or 20 to 30 degrees.

62. Filter cartridge, according to any one of claims 55, 56 and 58-60, characterized in that at least one or a plurality of engagement projections is straight.

63. Filter cartridge, according to any one of claims 55 and 57-60, characterized in that Petition 870250087534, dated 09 / 26 / 2025, page 320 / 514 14 / 18 at least one or a plurality of engagement projections is not straight.

64. Filter cartridge, according to claim 63, characterized in that the straight line extending between the leading edge and the trailing edge is angled between 5 to 80 degrees; or 15 to 70 degrees; or 20 to 30 degrees.

65. Filter cartridge, according to any one of claims 55-64, characterized in that there is only one engagement projection forming a radially continuous surface.

66. Filter cartridge, according to claim 65, characterized in that the radially continuous surface of the engagement projection encircles the media package.

67. Filter cartridge, according to any one of claims 55-66, characterized in that at least one or a plurality of engagement projections comprises a ramp.

68. Filter cartridge, according to claim 67, characterized in that the ramp is angled between any one of 5 to 80 degrees; or 15 to 70 degrees; or 20 to 30 degrees.

69. Filter cartridge, according to claim 67, characterized in that the ramp is angled between any one of 100 to 175 degrees; or 105 to 165 degrees; or 150 to 160 degrees.

70. Filter cartridge, according to any one of claims 55-69, characterized in that: (a) the filter cartridge has a first end cap fixed to the first end of the tubular media package; and (b) at least one or a plurality of engagement projections are an integral part of the first end cap.

71. Filter cartridge, according to claim 70, characterized in that the first end cap has an external radial surface defining at least one or a plurality of engagement projections.

72. Filter cartridge, according to any one of claims 70 and 71, characterized in that: (a) the filter cartridge includes a sealing member positioned so as to form a seal with a cover arrangement; and (b) the first end cap has an external axial surface holding the sealing member.

73. Filter cartridge, according to any one of claims 70-72, characterized in that the first end cap is an open end cap.

74. Filter cartridge, according to any one of claims 70-73, characterized in that it additionally includes a second end cap fixed to the second end of the tubular media package.

75. Filter cartridge according to claim 74, characterized in that the filter cartridge additionally includes an outer coating around the tubular media package, the outer coating extending between the first end cap and the second end cap.

76. Filter cartridge, according to any one of claims 55-75, characterized in that the displacement arrangement extends to a distal end with a stepped cross-sectional profile defining at least one radially facing surface and at least one axially facing surface.

77. Filter cartridge, according to claim 76, characterized in that at least one surface facing the radiation is a radial surface facing outwards.

78. Filter cartridge according to claim 76, characterized in that at least one radially facing surface is an inwardly facing radial surface.

79. Filter cartridge, according to any one of claims 76 to 78, characterized in that the stepped cross-sectional profile includes a single step.

80. Filter cartridge, according to any one of claims 76 to 78, characterized in that the stepped cross-sectional profile includes a plurality of steps.

81. Filter cartridge, according to any one of claims 76 to 80, characterized in that the distal end additionally includes an axial extension inserted radially from the stepped cross-sectional profile. Petition 870250087534, dated 09 / 26 / 2025, page 323 / 514 17 / 18 82. Method for maintaining a filter assembly, wherein the filter assembly includes an end arrangement and a filter cartridge; wherein the method is characterized in that it comprises: (a) moving the end arrangement with a first contiguous member against a displacement member to radially move the first contiguous member; and (b) tightly engaging the end arrangement with the filter cartridge.

83. Method according to claim 82, characterized in that moving the first contiguous member against the displacement member includes moving the first contiguous member against a ramp arrangement.

84. Method according to claim 83, characterized in that moving the first contiguous member against the displacement member includes moving the first contiguous member against an incorporated hinge.

85. A method according to any one of claims 82-84, characterized in that the filter cartridge has a first end cap and in which moving the first contiguous member against the displacement member includes moving the first contiguous member against the displacement member that is an integral part of the first end cap.

86. Method, according to any one of claims 82-85, characterized in that moving Petition 870250087534, dated 09 / 26 / 2025, p. 324 / 514 18 / 18 radially the first contiguous member includes moving the first contiguous member radially outward.

87. A method according to any one of claims 82-85, characterized in that radially moving the first contiguous member includes radially moving the first contiguous member inward.

88. A method according to any one of claims 82-87, characterized in that radially moving the first contiguous member includes radially moving an axially rigid and radially flexible spring.

89. A method according to any one of claims 82-88, characterized in that moving the end arrangement includes moving a cover arrangement that retains the first contiguous member.

90. Method, according to any one of claims 82-88, characterized in that moving the end arrangement includes moving a filter head that retains the first contiguous member. Petition 870250087534, dated 09 / 26 / 2025, pp. 325 / 514

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