Abstract: This disclosure generally relates to perforated filter media and coalescing filter elements utilizing perforated filter media. One example coalescing filter element is structured to separate a dispersed phase from a continuous phase of a mixture. The filter media includes a first coalescing layer. The first coalescing layer includes a first filter media. The first filter media has a plurality of pores and a first perforation. Each of the plurality of pores is smaller than the first perforation. The first perforation is formed in the first filter media and extends through the first filter media. The plurality of pores are structured to capture a portion of the dispersed phase. The first perforation is structured to facilitate the transmission of coalesced drops of the dispersed phase through the first coalescing layer such that the coalesced drops of the dispersed phase are separated from the portion of the dispersed phase captured in the first coalescing layer.

Abstract: A device for treating fluid, in particular a filter device, has first and second tubular elements (12), (14) forming an element assembly (10). One element (14) is accommodated in the other element (12) forming a flow chamber (33) between the two elements (12, 14), with a first element (12) arranged in the direction of the inflow side (29) of a fluid to be treated and a second element (14) arranged in the direction of the outflow side (31) of the treated fluid in the element assembly (10). During the fluid treatment, the flow is routed through both elements (12, 14) in succession from the direction of the inflow side (29) towards the outflow side (31). In a joint viewing direction (P), the first element (12) facing the inflow side (29) at least partially has a uniform or non-uniform contour and the second element (14) facing the outflow side (31) at least partially has a non-uniform or uniform contour.

Abstract: A replacement filter element having a removable pin attached to the filter element is described. The removable pin is attached to the filter element via a first interference fit. When the replacement filter element is installed into a filtration system having a drain valve with an internal draft, the removable pin seals onto the drain valve and forms a second interference fit between the drain valve and the pin. The pin seals an opening in the drain valve. The second interference fit is stronger than the first interference. Accordingly, when the replacement filter element is removed from the filter housing (e.g., during a service event of the replacement filter element), the pin detaches from the replacement filter element and remains positioned within the drain valve thereby preventing fluid from leaking from the housing when the filter element is removed. The pin permanently plugs the drain valve once installed.

Abstract: Solutions for efficiently filtering air for a machine are disclosed. In one embodiment, a filter element for a filter assembly of a rotary machine is provided. The filter element includes: a first set of pleats, each pleat including a first tip radius and a first spacing; and a second set of pleats, each pleat including a second tip radius and a second spacing, wherein the first and second set of pleats are positioned upon a continuous filter media.

Abstract: A fuel filter of an internal combustion engine including a filter housing having a lowermost housing base and a topmost removable housing lid. The filter housing has one raw fuel inlet and one pure fuel outlet. A replaceable annular filter insert mounts there in the filter housing, fuel flowing through it from outside towards inside. The filter subdivides an interior space of the filter housing into a raw zone and a pure zone. A supporting body is arranged in the interior of the annular filter insert, a first flow channel and a second flow channel extending therethrough. The first flow channel connects at one end to the pure zone and at the other end to the pure fuel outlet. The second flow channel connects at one end to the raw zone via a vent throttle or a vent valve and at the other end to a reservoir return in the filter housing.

Abstract: A spiral wound membrane element and a method for cleaning a spiral wound membrane sheet are provided. The spiral wound membrane element comprising a perforated central tube; one or more membrane sleeves, each sleeve comprising two membrane sheets enclosed at two edges around a feed spacer sheet and wrapped around the central tube; a permeate carrier sheet attached to the central tube at a first edge opposite a second edge; and a seal on third and fourth edges of the permeate carrier sheet. The method comprises introducing two solution with different solute concentration to two sides of the spiral wound membrane sheet; establishing a concentration gradient between the first and second sides; communicating a first solvent from the first side to the second side to remove a foulant located on the second side of the membrane sheet and collecting a waste stream that contains the foulant.

Abstract: A reverse osmosis element is provided. The reverse osmosis element includes a plurality of permeate tubes arranged to form a core frame. The reverse osmosis element further includes a plurality of leaves wound over the core frame. Each leaf of the plurality of leaves is coupled to one permeate tube of the plurality of permeate tubes. A retentate channel is defined by the plurality of permeate tubes of the core frame, and sealed by the plurality of leaves wound over the core frame. The reverse osmosis element includes first and a second end caps coupled to the plurality of permeate tubes. At least one of the first and the second end caps includes a retentate discharge port, and at least one of the first and second end caps includes one or more permeate discharge ports.

Abstract: Particular aspects of the inventive technology may, in embodiments, relate to a fluid filter apparatus that includes a filtered fluid conduit that has a length that is at least three times a characteristic diameter; and a plurality of holes, wherein at least one of said holes has a first shape and engages an end cap during fluid filter operation, and wherein at least one other of said holes has said first shape and passes filtered fluid from outside of said filtered fluid conduit to a conduit interior during fluid filter operation.

Abstract: A dual stage filter includes an outer filter with a first media and an inner filter with a second media. A barrier is between the first media and the second media. The barrier directs fluid flow between the first and second media. The barrier creates a flow path between the first and second media, such that a working fluid, which is desired to pass through the first and second media, is directed by the barrier and flows through the second media, and such that another fluid, which is not desired to pass through the second media, is directed by the barrier and separates from the working fluid. Using the barrier, the dual stage filter can employ either or both upward flow and downward flow to achieve efficient fluid separation, for example fuel water separation in an engine fuel filter.

Abstract: The present invention provides a coolant demineralizer for a fuel cell vehicle, which removes ions, released from a pipe, from coolant of a fuel cell stack. In preferred embodiments, the present invention provides a coolant demineralizer suitably configured to reduce the occurrence of differential pressure due to an ion resin layer such that coolant can smoothly flow through a filter member, thereby increasing the effect of filtering ions and improving the efficiency of use of ion resin.

Abstract: The invention relates to a filtering device, comprising a tubular filter element and a carrier part, with the filter element fastened thereon. The carrier part can be inserted between an unfiltered fluid pipe and a filtered fluid pipe. The pipes can be assembled into a continuous flow pipe, wherein the filter element protrudes into the pipe interior.

Abstract: Multiple water purifier modules are stacked in a rack having manifolds for each of the various water filtration functions: feed, concentrate, and filtrate. Each module connects to the rack by a quick connect for each of the filtration tubes. The quick connects are of the self-sealing type. A handle on the end of the module away from the rack has a lever for causing the quick connects to release the module from the rack while the system remains in operation. The, module can then be totally removed from the rack for testing, service, or replacement while the overall system remains in operation. Each module contains complete filtration media. The water is passed into the feed tubes under pressure where it passes into an elongated cavity filled with elongated hollow fibers. Filtrate, such as purer water, passes through the walls of the hollow fibers to an outlet, while concentrate, which is fluid with a high percent of impurities, flows from the cavity into concentrate tubes to another outlet for disposal.

Abstract: The present invention relates to a spiral wound reverse osmosis membrane element which is formed by winding at least one set of water purification membrane module around a central treated water pipe, and each set of the water purification membrane module is formed by laminating a mesh-like treated water flow guiding member, a reverse osmosis membrane and a mesh-like feed water flow guiding member; the reverse osmosis membrane is folded at a folded side to form a feed water flow channel therein along its inner surface; a treated water flow channel is formed between outer surfaces of adjacent reverse osmosis membranes; the mesh-like feed water flow guiding member is disposed inside the feed water flow channel; the mesh-like treated water flow guiding channel is disposed inside the treated water flow channel; the treated water flow channel is opened only at a treated water outlet which opens towards the central treated water tube, and the treated water flow channel is closed and sealed at remaining three sides;

Abstract: A fluid treatment filtering cartridge having a permeable filtering element and a permeable high-pressure resistant woven tubular fabric external cover formed by a radial weaving loom process that does not use adhesives, thermal bonding or ultrasonic welding techniques is disclosed. The external high-pressure resistant woven cover is secured to end caps of the filter cartridge by adhesives, thermal bonding or ultrasonic welding and surrounds the filter media to form the exterior surface of the filter cartridge and provide both circumferential and longitudinal strength to the filter cartridge in order for it to withstand internal pressures exceeding 250 psi.

Abstract: A filter device, especially a line filter forming part of hydraulic installations, includes a filter housing (1) that can be removed from a filter head and is used to receive a filter element (5) that separates a non-filtered side (13) from a filtered side (11) in a position in the filter housing for the operation of the filter. The filter device is provided with a display device (19, 21) signaling the absence or presence of the filter element (5) in the filter housing (1) in the operating position.

Abstract: Particular aspects of the inventive technology may, in embodiments, relate to a fluid filter apparatus that includes a filtered fluid conduit that has a length that is at least three times a characteristic diameter; and a plurality of holes, wherein at least one of said holes has a first shape and engages an end cap during fluid filter operation, and wherein at least one other of said holes has said first shape and passes filtered fluid from outside of said filtered fluid conduit to a conduit interior during fluid filter operation.

Abstract: A liquid rebalancer for improving the taste of liquids using a sinusoidal helical coil made of three-strand copper wire.

Abstract: A filter cartridge in a filter-in-filter design with an inner filter and an outer filter. A mechanism, for example crush ribs, connects an upper end plate of the outer filter and an upper end plate of the inner filter to prevent relative axial and radial movement therebetween when assembled. Relative axial or radial motion can create a rattling noise which is sometimes perceived as a low quality filter. The crush ribs are, for example, formed on an interior surface of the upper end plate of the outer filter, and the ribs engage an outer perimeter of the upper end plate of the inner filter. One or more of the ribs crush when the inner filter is installed into the outer filter to ensure tight axial and radial engagement between the filters.

Abstract: A filter cartridge for use in filtering fluids, for example fuel, lubrication, hydraulic and other liquids, as well as air. The filter cartridge is a filter-in-filter design with an inner filter and an outer filter. The inner filter and the outer filter, for example the bottom end plates thereof, are connected to each other via a snap fit connection mechanism. During manufacture, the inner filter can be inserted into the outer filter, with the snap fit connection mechanism retaining the inner filter in the outer filter.

Abstract: A filter cartridge configured as a filter-in-filter design with an inner filter and an outer filter. The filter cartridge has features, for example an overhanging lip, to engage with a lid of a filter housing in which the cartridge is installed such that the lid is connected to the cartridge. As a result, the cartridge can be connected to the lid to facilitate installation and removal of the cartridge. Alternatively, the same features that allow connection with the lid permit a user to manually grasp the cartridge during installation and removal so that the cartridge can be used without a lid having attachment features. The filter cartridge is also designed to enable use of a longer inner filter within the outer filter. A longer inner filter increases the amount of filter media available for filtering the fluid.

Abstract: The present invention provides novel concentric filter elements that have advantages over traditional concentrically arranged filters as well as filters comprising a single cylindrical filter element.

Abstract: A filter element for filtering fluids has at least one filter unit (12, 14, 16) that is disposed concentrically around the axis of the element. The unit is supported on at least one supporting element (24, 26, 30) in the direction of the flow of the fluid. At least part of the supporting elements (24, 26) is provided, at least on the side facing the filter unit (12, 14, 16), with channels (28) for guiding the fluid. Longitudinal ribs (50) delimit the channels (28), and extend along the supporting element (24, 26) in the form of spiral tracks. The two free ends of each channel (28) emerge at opposite ends of the corresponding supporting element (24, 26). The channels (28) extend continuously along the supporting element, are devoid of multiple deviations in the fluid flow and only partially surround the corresponding supporting element (24, 28) to form a torsional guide for the fluid flow.

Abstract: An encapsulated filter cartridge is disclosed, which includes a filter assembly including a carbon block filter element and a microporous filter element. The filter cartridge has a permanently sealed sump defining an interior chamber configured to accommodate the filter assembly, the sump having an inlet for permitting unfiltered fluid to enter the interior chamber for communicating with the radially outer surface of the filter assembly and an outlet for permitting filtered fluid to exit the interior chamber from the axial portion of the filter assembly. The microporous filter element of the filter assembly may include a hollow fiber subassembly housed within the axial cavity of the carbon block element, said fiber subassembly including a plurality of hollow microporous fibers, or a pleated filter element surrounding the radially outer surface of the carbon block element.

Abstract: A system for removing material from a flowing liquid, where the system includes one or more cartridges, where each cartridge has an outer permeable wall and an inner permeable wall that form a media region between the walls, where a media is disposed within at least part of the media region to remove at least a portion of the material from the flowing liquid, the cartridge also having an inner cartridge lumen in communication with the inner permeable wall, and a cartridge outlet in communication with the inner cartridge lumen; a cartridge chamber having a treatment region that houses the one or more cartridges, where the cartridge chamber also includes a chamber inlet to accept the flowing liquid, and a chamber outlet to discharge treated liquid; and an actuatable valve positioned outside the one or more cartridges, where the valve controls a flow rate of the flowing liquid within the treatment region by actuating in response to a change in a level of the liquid in the treatment region.

Abstract: The multiple-tube filter proposed consists of at least one perforated filter element (15) whose outside surface has grooves (2) in a spiral round it, the surface between the grooves (2) preferably curving outwards in a circular arc.

Abstract: The drain element for collecting hydrocarbons comprises a screen (TM) surrounding a suction cylinder (CA) extending in a longitudinal direction (AL). The screen is made up of rods (TT, TC) which extend along said longitudinal direction (AL) and which are regularly spaced apart around the suction cylinder. At least one of said rods is hollow in order to form a collector rod (TC), said collector rod (TC) having a lateral orifice and communicating with the inside of the suction cylinder via one of its ends.

Abstract: The invention concerns the designing and production of filtering assemblies used for filtering liquids circulating in engines or hydraulic equipment. The invention is characterised in that a cylindrical element designed to support a filtering cartridge in a filtering assembly for liquid circulating in an engine or a hydraulic equipment, said cartridge including a filtering medium delimited by two plates, comprises at least two longitudinal ribs (32) wherefrom extend a series of sloping fins (33).

Abstract: A filter cartridge for filtering impurities and the like from a swimming pool or other body of water is provided. The filter cartridge is positioned in a receptacle for receiving water and for recirculating it back to the pool. The filter cartridge includes a core communicating with the recirculating system and having a plurality of openings therein communicating with a supporting frame located around the core and affixed thereto. The frame has a multiplicity of openings therein and a plurality of undulations extending therealong. A flexible sleeve is located around the frame and is of sufficient size to assume the contour of the frame when water is supplied from the exterior of the sleeve to the interior of the core, thereby providing a maximum filtering surface. The sleeve has elastic bands around both ends for drawing the ends together around the core beyond the ends of the frame. The sleeve can be easily removed for cleaning or replacement.

Abstract: A filter for filtering liquids, especially fuel, which includes a concentric housing, an unfiltered liquid inlet, and filtered fluid outlet, and a backflow member. A concentric filter element, with a dirt collecting chamber in the lowermost part thereof, is disposed in the housing, which is closed with a cover. The housing also contains a riser pipe having a return bore hole in the uppermost part thereof, as well as a return pipe. An intermediate pipe, which is sealingly closed by the cover, is disposed above the riser pipe, and the filter element is removably attached to the intermediate pipe.

Abstract: A self-cleaning water filter, coupled to a water flow having particulates therein, that includes a pair of canisters, each having a cylindrical wedge wire water filter screen. An elongated brush running the length of the screen is disposed between two confining walls also running the length of the screen to form a chamber. A elongated partition, including two sets of apertures, is used, along with the elongated brush, to divide the chamber into two particulate dislodge chambers and a drain subchamber. A drain is in fluid communication with the drain subchamber. During cleaning, the drain is opened and the screen is rotated against the brush for liberating the particulate contaminants and a limited amount of the water flow into the two dislodge subchambers. The particulate contaminants and the limited amount of water then pass through the apertures at a high velocity and into the drain a subchamber which exits through the drain.

Abstract: An encapsulated filter cartridge is disclosed, which includes a filter assembly including a carbon block filter element and a microporous filter element. The filter cartridge has a permanently sealed sump defining an interior chamber configured to accommodate the filter assembly, the sump having an inlet for permitting unfiltered fluid to enter the interior chamber for communicating with the radially outer surface of the filter assembly and an outlet for permitting filtered fluid to exit the interior chamber from the axial portion of the filter assembly. The microporous filter element of the filter assembly may include a hollow fiber subassembly housed within the axial cavity of the carbon block element, said fiber subassembly including a plurality of hollow microporous fibers, or a pleated filter element surrounding the radially outer surface of the carbon block element.

Abstract: There can be obtained an ecological filtration apparatus providing a sufficient function of precise filtration while contributing to saving resources and minimizing refuse. The filtration apparatus includes a housing having an inlet and an outlet, an outer cylinder fixed to the housing, and a cartridge filter formed mainly of a cylindrical filter, an inner cylinder and end caps. The cartridge filter is detachably attached to the housing, housed in the outer cylinder, blocking a channel extending from the inlet to the outlet.

Abstract: A fluid filter includes a cylindrical pleated filter media disposed around a central perforated support core or self-supporting. An outer support sleeve comprising a extruded nylon, diamond-shaped mesh is stretched across the pleated media, and elastically conforms to the pleat peaks to structurally retain the pleats of the pleat peaks in fixed relation to one another. A bead of adhesive is then applied over the sleeve to fix the sleeve to the pleat peaks. End caps are disposed at opposite ends of the fluid filter.

Abstract: A self-cleaning fuel oil strainer, coupled to a continuous fuel flow, that includes a pair of canisters, each having a cylindrical wedge wire fuel oil filter screen. An elongated brush running the length of the screen is disposed between two confining walls also running the length of the screen to form a chamber. A elongated partition, including two sets of apertures, is used, along with the elongated brush, to divide the chamber into two particulate dislodge chambers and a drain subchamber. A drain is in fluid communication with the drain subchamber. During cleaning, the drain is opened and the screen is rotated against the brush for liberating the particulate contaminants and a limited amount of fuel oil into the two dislodge subchambers. The particulate contaminants and the limited amount of fuel oil then pass through the apertures at a high velocity and into the drain subchamber which exits through the drain.

Abstract: A filtering device includes a container having an inlet for introducing liquid to be treated, an annular multi-layered prepacked screen assembly provided in the container and having an outlet for treated liquid. The screen assembly includes three or more cylindrical screens having different diameters and being coexially disposed in the container with their axes extending vertically in the container. An annulus is formed between the respective cylindrical screens. Two or more different filter materials performing different filtering functions are filled one in each of the annuluses between the cylindrical screens.

Abstract: A filter (110) is provided with a fixture (70) having a first set of axially extending inner pillars (72, 74, 76, 78) defining a first cylinder (80) along inner bend lines (34) of inner pleat tips (32) of an annular pleated filter element (22), a second set of axially extending outer pillars (82, 84, 86, 88) defining a second cylinder (90) extending along outer bend lines (38) of outer pleat tips (36) of the filter element (22), inner and outer circumferential rings (92 and 94) extending around the respective first and second sets of pillars and circumferentially spacing and supporting such pillars, and a plurality of radial spokes (100, 102, 104, 106) at an axial end (98) of the fixture (70), each spoke extending radially between a respective inner and outer pillar and radially spacing and supporting respective inner and outer pillars in radially spaced concentric relation defining a reception annulus (108).

Abstract: A filter for filtering liquids, especially fuel, which includes a concentric housing, an unfiltered liquid inlet, and filtered fluid outlet, and a backflow member. A concentric filter element, with a dirt collecting chamber in the lowermost part thereof, is disposed in the housing, which is closed with a cover. The housing also contains a riser pipe having a return bore hole in the uppermost part thereof, as well as a return pipe. An intermediate pipe, which is sealingly closed by the cover, is disposed above the riser pipe, and the filter element is removably attached to the intermediate pipe.

Abstract: Two perforated metal sleeves are secured in radially spaced coaxial relation one within the other between a pair of rigid end caps that are releasably secured to opposite ends of a plurality of rods which support the caps removably and sealingly over opposite ends, respectively, of the sleeves. An annular filter cartridge is releasably secured in the radial space between the sleeves with resilient annular end caps on opposite ends of the cartridge disposed in releasable, sealing engagement with the rigid end caps. Fluid that is to be filtered is delivered to the radial space separating two annular filter elements in the filter cartridge. When one or the other of the end caps is removed from the support rods the cartridge can be removed from between the sleeves and replaced without having to destroy the sleeves or the rigid end caps.

Abstract: Apparatus in fluid communication with a water leg portion of a hydrocarbon-contaminated water, e.g., a water leg portion of an offshore drilling or production platform sump tank for conveying water, separated from oil, into contact with organophilic media canisters such that the hydrocarbons and other organic materials commingled with the sump tank water will be adsorbed onto the organophilic media and detected by the embedded probe in selected canisters. The canisters are provided in a plurality of stacks and are in fluid communication with a header disposed at the bottom of the vessel housing the various stacks of canisters. Solids that do not pass through the canisters are accumulated at the bottom of the vessel and easily drained through a drain port. The water will pass through the media and will be conveyed back to the ocean water without contamination.

Abstract: A water filter is packaged in a way that permits longer dwell time and greater volume in a dwell passage of the water filter. In one embodiment the water filter includes an influent passage where a biocide is imparted to the water, a dwell passage where the water remains in contact with the biocide for at least a predetermined duration, and an effluent passage where the biocide is removed from the water. The water filter includes a replaceable cartridge mounted in a pressure vessel. By arranging the dwell passage to include a pan shaped portion in the bottom of the vessel and an axial portion along the extremity of the cartridge, greater volume, greater mixing, and more effective disinfecting result. Another embodiment includes a series of baffles on the exterior surface of the cartridge that create further turbulence for mixing the biocide with the water.

Abstract: A combination filter element comprising a bundle of hollow microporous fibers housed within an extruded carbon block, wherein the carbon block is fabricated to balance particle retention capacity against absorption capacity to provide a composite filter with desirable pressure drop, filter life, and particulate and chemical contamination reduction, and a filtration device, in which combination filter element may be employed, having a base portion including a sump which has an inlet and an outlet and a base which has a reception port for receiving the filter element.

Abstract: A multiple tube filter made of at least one perforated filter element (15), wherein the outside of the filter element (15) has spirally circulating grooves (2), and the surface between grooves (2) is preferably arched outward in the form of a segment of a circle.

Abstract: A filter/sanitizer has a filter housing, provided with a fluid inlet and a fluid outlet, a filter cartridge with a hollow interior, located within the filter housing, and a sanitizer cartridge, with a hollow core, positioned within the hollow interior of the filter cartridge. In a preferred embodiment, the sanitizer cartridge is constructed with an outer fluid-permeable member and an inner fluid-permeable member, the outer and inner members substantially enveloping a space therebetween, with the space containing a sanitizing media bed. In operation, as fluid enters the filter housing through the fluid inlet, substantially the full flow of fluid passes through the filter cartridge, through the sanitizer cartridge and around the sanitizing media contained within the bed, into the hollow core of the sanitizer cartridge, and out of the filter housing through the fluid outlet.

Abstract: A filter for subterranean environments includes an inner support member, a filter body containing a filter medium disposed around the inner support member, and at least one end connector connected to a lengthwise end of the filter body and sealed against the inner support member without being welded to the inner support member. The end connector may be restrained from movement relative to the inner support member in a lengthwise direction of the inner support member, without being welded to the inner support member, to resist axial forces acting on the filter during installation or operation in a well. Alternatively, the end connector may be capable of movement with respect to the inner support member in a lengthwise direction of the inner support member to enable the filter to undergo thermal expansion without damage to the filter body or other portions of the filter.

Abstract: A filter assembly has a filter support means which axially receives a coreless filter element which is constructed of recyclable materials.

Abstract: A filter comprises a filter cartridge located within a housing. Fuel flows through a filter medium of the cartridge, in use, from an outer chamber to an inner chamber. From the inner chamber, the fuel flows over and around a sedimentation baffle located within a sedimentation chamber. Fuel exits the sedimentation chamber through an outlet passage, an air collection chamber being arranged to collect air from the flow of fuel. Air exits the air collection chamber via openings.

Abstract: A water filter is packaged in a way that permits longer dwell time and greater volume in a dwell passage of the water filter. In one embodiment the water filter includes an influent passage where a biocide is imparted to the water, a dwell passage where the water remains in contact with the biocide for at least a predetermined duration, and an effluent passage where the biocide is removed from the water. The water filter includes a replaceable cartridge mounted in a pressure vessel. By arranging the dwell passage to include a pan-shaped portion in the bottom of the vessel and an axial portion along the extremity of the cartridge, greater volume, greater mixing, and more effective disinfecting result. Another embodiment includes a series of baffles on the exterior surface of the cartridge that create further turbulence for mixing the biocide with the water.

Abstract: A filter assembly including a filter housing having a standpipe extending upwardly therethrough, in which is located a spring-biased flow element, and about which is received a replaceable filter element. A screw threaded cover is removably attached to the housing. The filter element includes an upper endcap, a center tube, a lower endcap and cylindrical filter media around the center tube. The lower endcap includes a central opening which receives upwardly therethrough the standpipe in sealed relation. A separate actuator with a projection formed to extend therefrom is located in the center tube, either fixedly or movably, below the upper endcap. When the filter element is placed over the standpipe, and the cover attached to the housing, the projection on the actuator pushes down against the spring-biased flow element, putting cavities formed in the flow element and openings formed in the standpipe in fluid communication.

Abstract: A method of manufacturing a fluid filter comprising: (a) providing a cone having a tip end and an open end and made of a filter material; (b) providing a support element having a plurality of concentric annular members mounted on a base and having outermost and innermost concentric annular members; (c) aligning the central axes of the cone and the support element with the tip end of the cone closest to the support element; and (d) inserting a portion of the cone into a circular area between two concentric annular members by placing a forming sleeve inside the cone and inserting the forming sleeve between the two concentric annular members, the concentric annular members being generally cylindrical and having an interior and an exterior.

Abstract: Flow inverter arrangements are provided for utilization in spin-on, liquid filter cartridges, such as lubricating oil filter cartridges and the like, wherein the filter cartridge structure normally used for "inside-out" flow is reversed to accommodate "outside-in" flow. Each embodiment of the invention utilizes a cylindrical wall disposed within the hollow core of a filter media, in spaced relation thereto, so as to define an annular space which is aligned with the input ports in the end plate of the housing. A filter media has a first end cap within an opening aligned with the central core so that liquid which is passed from the annular space and through the filter media can pass through the opening in the end cap and to the central port which is aligned with the hollow core of the filter media, but isolated from the filter media by the interior wall.