Abstract: Fabric drop-down diffusers are disclosed. An example drop-down diffuser includes a hoop to be supported adjacent an end of an air duct, and a first fabric sheet to hang downward from the hoop. The first fabric sheet to define a first wall of an air chamber adjacent the hoop on a side of the hoop opposite the air duct. The first fabric sheet to completely surround the air chamber along a circumferential path corresponding to the hoop. The hoop to be transverse to the air duct and positioned so that air delivered by the air duct is to pass through the hoop and into the air chamber. The drop-down diffuser also includes a second fabric sheet to be coupled to the first fabric sheet. The second fabric sheet to define a second wall of the air chamber.

Abstract: A filter element for exchangeable installation into a filter housing has an annular filter medium with an annular seal secured directly or indirectly onto the first axial end. The annular seal having a positioning and sealing section and concentric annular sealing rings between which a sealing groove is formed. A radially outer side of the radially outer annular ring having a key locking system formed by a plurality of circumferentially spaced apart radial projections, spaced apart by radial indentations, adapted to positively engage cooperative configured geometries or key locking features of a filter housing when in an installed state, thereby locking a rotational orientation and position of the filter element.

Abstract: According to the present disclosure, features, components and techniques useable for providing air cleaner arrangements are provided. Many of the features relate to an axial seal arrangement provided on a filter cartridge. A typical filter cartridge, for use with these features, is a filter cartridge having opposite flow ends. Example media arrangements that fit this characterization are described. Seal arrangements provided with an axial housing sealing engagement surface are shown. A seal arrangement is provided. Also, air cleaner assemblies having advantageous features therein are provided. Further, air cleaner housings are described, with selected, preferred features for engagement with filter cartridges.

Abstract: A filter system (100) having a housing (110), a fluid inlet (102) formed in a housing wall (112), a fluid outlet (108) formed in a housing wall (120), a primary filter element (50) and a secondary filter element (10). The secondary filter element (10) is arranged on a stand pipe (150) rigidly connected to one of the housing walls (120). The secondary filter element (10) includes a filter medium (16) forming a body (36) having at least one longitudinal seam (18) along a longitudinal axis (L) and an end cap (20) at its top region (12). The secondary filter element (10) and the stand pipe (150) are mutually connected by connection elements (22, 156). The secondary filter element (10) and the stand pipe (150) are configured with mutual self-positioning elements (30, 180) to arrange the secondary filter element (10) in a defined rotational position with respect to one or more struts (170).

Abstract: A filter assembly comprises a housing defining an internal volume. The housing defines an outlet. A housing ledge extends radially inwards from a rim of the outlet. An outlet conduit comprises an outlet elbow, and an outlet tube extending axially from the outlet elbow towards the housing. The outlet tube is positioned within the housing. A rib extends radially from an outer surface of the outlet tube proximate to the outlet elbow. The rib engages the housing ledge so as to couple the outlet conduit to the housing. A filter element is also positioned within the housing.

Abstract: The present invention relates to a cage for a tubular, extended surface filter bag that increases the internal volume of the bag and provides reduced resistance to the gas flow path through the cage. The cage includes a plurality of vertical cage wires that extend longitudinally, and has at least one horizontal cage support shaped to support the vertical cage wires in a tubular formation. The cage supports are in the form of pressed metal straps having a wide body extending between two thin edges.

Abstract: A gas turbine air intake system uses a filter element having a seal member with radial projections and radial recesses. The seal member forms a seal with components on the tube sheet of the system and at the end opposite of the tube sheet. At the end opposite of the tube sheet, there can be an assembly cover, or alternatively, an additional filter cartridge.

Abstract: A filter system (100) having a housing (110), a fluid inlet (102) formed in a housing wall (112), a fluid outlet (108) formed in a housing wall (120), a primary filter element (50) and a secondary filter element (10). The secondary filter element (10) is arranged on a stand pipe (150) which is rigidly connected to one of the housing walls (120). The secondary filter element (10) comprises a filter medium (16) forming a body (36) having at least one longitudinal seam (18) along a longitudinal axis (L). The filter body (36) has a first edge (13) at one region (12) which is curved in an initial unwound state of the filter medium (16) and straight in a final wound state of the filter medium (16) forming the filter body (36) and a second edge (15) at the opposite region (14) of the filter body (36) with respect to the longitudinal axis (L) which is straight in an initial unwound state of the filter medium (16) and curved in a final wound state of the filter medium (16) forming the filter body (36).

Abstract: A filter assembly comprises a filter element and a housing. The filter element comprises a filter media, and an alignment feature positioned on at least a portion of an outer surface of the filter media. The alignment feature comprises an alignment channel. The housing defines a housing internal volume. At least a portion of the filter element is positioned within the housing internal volume. The housing comprises an alignment protrusion extending axially from a housing inner surface towards the filter element so as to mate with the alignment channel. The alignment feature comprises a ring member positioned circumferentially around the filter media at a filter media first end proximate to the housing, and a filter baffle extending from the ring member. The filter baffle is circumferentially positioned on at least a portion of the outer surface of the filter media and defines the alignment channel.

Abstract: An air cleaner assembly includes a filter housing extending axially along a longitudinal axis and a cover. The filter housing includes at least one sidewall (e.g., an annular sidewall) extending between a first housing end and a second housing end and a retainer formed proximate at least one of the first housing end and the second housing end. The cover is removably coupled to at least one of the first housing end and the second housing. The cover includes a handle assembly having a latch configured to releasably engage the retainer at the fiber housing. The filter element includes filter media and is axially insertable into the filter housing when the cover is removed from the filter housing.

Abstract: Air cleaner assemblies, related methods, components therefor, and features thereof are described. In depicted examples, the air cleaner assemblies and components optionally use advantageous housing seal features. In some examples, a filter cartridge for an air cleaner includes a media pack extending along a longitudinal axis between opposite inlet and outlet flow ends and defining an outer perimeter with opposite straight sides and a first curved end. The filter cartridge can include a seal arrangement circumscribing the media pack outer perimeter, wherein a portion of the seal arrangement extends beyond a first plane defined by the media pack outlet flow end and a portion of the seal arrangement is disposed between the first plane and a second plane defined by the media pack inlet flow end, wherein the seal arrangement is aligned along a third plane disposed at an oblique angle to the first and second planes.

Abstract: A round filter element has a filter medium body flowed through by a fluid to be purified in radial direction relative to a longitudinal axis of the filter medium body. The filter medium body radially encloses an inwardly positioned flow space. An end disk is arranged at an end face of the filter medium body. The end disk has a shaped body axially delimiting the inwardly positioned flow space. The end disk has a sealing disk arranged externally at the shaped body, wherein the sealing disk covers the shaped body and the end face of the filter medium body. The shaped body has a receiving depression that is flow-tight relative to the inwardly positioned flow space. The sealing disk has a receiving opening aligned with the receiving depression of the shaped body. The receiving depression and the receiving opening can receive a support element of a filter housing.

Abstract: A filter element is provided. The filter element includes a filter media pack including an outer surface. The outer surface extending between a first flow face and a second flow face. The filter element also includes a polymeric coating applied to the outer surface of the filter media pack, wherein the polymeric coating is not a molded structure. In embodiments, the polymeric coating covers at least 25% of a span between the first flow face and the second flow face and has an average thickness of between 0.005 and 0.100 in. In other embodiments, the polymeric coating has a surface roughness of at least 50 ?in to provide an outer gripping surface. A method and system for applying the polymeric coating to the filter element are also provided.

Abstract: An apparatus and methods are provided for an air cleaner to be mounted onto an air inlet of an internal combustion engine. The air cleaner comprises an air filter that includes a filter medium disposed between a curved base and a cover. The curved base provides an interface between the air filter and the air inlet, and comprises a shape that provides clearance between the curved base and an electric choke installed onto a carburetor comprising the air inlet. The cover secures the air filter and the curved base to the air inlet such that an airstream is drawn through the filter medium and is conducted into the air inlet. A raised portion of the cover is configured to cooperate with the curved base to ensure a desired volume of the airstream is available to the air inlet at substantially all engine speeds.

Abstract: A coalescence separator for separating liquid droplets from a gas flow is provided with a multilayer structure of a coalescence filter medium as a finest stage of the coalescence separator. The multilayer structure of the coalescence filter medium is arranged between a gas inlet and a gas outlet and surrounds a cavity. A product of an air permeability of the coalescence filter medium and a grammage of the coalescence filter medium amounts to at least 16 g/m*s and maximally 100 g/m*s. The coalescence filter medium is a glass fiber paper. The coalescence separator is used, for example, as a main oil separator in screw compressors.

Abstract: This disclosure reports embodiments of a fluid filter for ESD mitigation having a conductive polymer sleeve. Embodiments of this filter may include a conductive sleeve and tie bands to mitigate electrostatic discharge.

Abstract: The invention relates to an integrated separator (1) for separating coarse and fine particles in a cement making process, said integrated separator (1) comprising a static separator (2) and dynamic separator (3), said dynamic separator (3) being arranged in an uppermost position relative to said static separator (2) and said static separator (2) comprising an outer housing (11); a de-agglomeration cone (5) and a first inverted frustum cone (6), said de-agglomeration cone [5] arranged adjacent to said first inverted frustum cone (6) by holding rods (18), said holding rods (18) are connected to said inverted first frustum of cone (6).

Abstract: A dehumidifying element includes: a layered body in which a plurality of sheets supporting an adsorbent that dehumidifies air are stacked on one another, with gaps provided between adjacent ones of the plurality of sheets, the gaps allowing air to pass therethrough; a casing that holds the layered body; and a cushioning member provided between the casing and the layered body in a stacking direction in which the plurality of sheets are stacked on one another, the cushioning member being configured to expand and contract.

Abstract: An air filter includes a filter media, an end cap, a urethane outlet air seal, and a screen assembly. The end cap is secured to a first end of the filter media. The urethane outlet air seal is secured to a second, opposite end of the filter media. The screen assembly is secured to a central portion of the filter media between the first and second ends.

Abstract: An air filtration unit is provided with a replaceable media cartridge to reduce the time, material, and labour costs required to maintain the filtration system. A housing portion includes a mounting flange, a supporting frame, and a collar for receiving a replaceable media cartridge. The replaceable media cartridge slides into the frame. At least one cap ensures that air flows through the cartridge and may provide a handle for easy removal and replacement of the cartridge.

Abstract: A particle separator assembly includes an airbox providing an outer tapered portion tapering from a first section having a first cross sectional area to a first opening having a second cross sectional area less than the first cross sectional area. The example assembly includes a flow diverter providing an inner tapered portion that tapers to a second opening. The example assembly includes an air filter housed by the airbox, the air filter is spaced from the second opening in a first direction, and the first opening is spaced from the second opening in a second direction opposite the first direction.

Abstract: A fastening system including a first sintered powder metal fastening component and a second metal fastening component. The first sintered powder metal fastening component has a first porous surface and a one-part adhesive in the first porous surface. The second metal fastening component has a second surface. The second surface is configured to frictionally engage with the first porous surface.

Abstract: An apparatus and methods are provided for an air filter precleaner for an open air filter box. The air filter precleaner includes a filter medium between a base and a grating that are fastened over an opening into an interior of the air filter box. The filter medium comprises a sheet of filter material having a shape and a size suitable for being supported between the base and the grating. The base is a rigid member that supports the filter medium in a sheet configuration, such that the airstream passes through the filter medium before entering the air filter box. The grating is a rigid member comprising a screen portion surrounded by a frame that is configured to be fastened onto the air filter box. The screen portion comprises a shaped lattice that allows the airstream to pass through the filter medium before entering the air filter box.

Abstract: An internal combustion engine includes an engine block, an air-fuel mixing device, and an air filter assembly. The air filter assembly includes a housing, a filter element, and a gap between the filter element and the housing. The housing includes a base and a cover which define an interior volume. The housing includes an outlet passage fluidly coupling a filtered air outlet to a final air outlet. The filter element divides the interior volume into a filtered volume and an unfiltered volume. The gap is configured to direct air in a first airflow pass before being filtered by the filter element. The filter element is configured to direct filtered air in a second airflow pass in a substantially opposite direction from the first airflow pass. The outlet passage is configured to direct filtered air into a third airflow pass in a substantially same direction as the first airflow pass.

Abstract: Filter cartridges including tubular filter media having ovate cross-sections and filter systems using the ovate tubular filter cartridges are described herein. The inner perimeters of the ovate cross-sections of one or more of the filter cartridges may be asymmetric, i.e., the inner perimeters of the cross-sections of the tubular filter media in the filter cartridges may have no lines about which they are symmetric. The inner perimeters of the ovate cross-sections of the tubular filter media in one or more of the filter cartridges may have only one line of symmetry.

Abstract: A particulate filtration device is suggested, comprising an inlet for an inflow of a gas stream which is particle-laden, an outlet for an outflow of the gas stream having a significantly reduced particulate load, a main filter section, which is arranged within a flow path of the gas stream between the inlet and the outlet and which comprises a filtration medium, and a prefilter chamber, which is arranged upstream of the main filter section and which comprises an inertial filter element, having several perforations, wherein the perforations of the inertial filter element are arranged within the flow path of the gas stream in such a way that when the flow path of the gas stream is passing through the perforations, an inertial separation of the particulates from the mean flow path of the gas stream is achieved.

Abstract: The gas separation membrane element contains a gas separation membrane, and a sealing portion for preventing mixture of a source gas and a specific gas permeated through a gas separation membrane. The gas separation membrane has a first porous layer including a porous membrane, and a hydrophilic resin composition layer disposed on the first porous layer. The sealing portion is a region in which a cured material of a sealant penetrates in at least the first porous layer in the gas separation membrane, and a thermal expansion coefficient A of the sealing portion and a thermal expansion coefficient B of a material forming the first porous layer satisfy a relation (I): 0.35?A/B?1.0??(I).

Abstract: A gas turbine air intake system uses a filter element having a seal member with radial projections and radial recesses. The seal member forms a seal with components on the tube sheet of the system and at the end opposite of the tube sheet. At the end opposite of the tube sheet, there can be an assembly cover, or alternatively, an additional filter cartridge.

Abstract: A reusable activated carbon filter is disclosed. It comprises: an outer mesh hollow cylinder, having a plurality of meshes formed thereon; an inner mesh hollow cylinder, having a plurality of meshes formed thereon, located inside the outer mesh hollow cylinder; two fixing rings, each having a plurality of long curved openings and a plurality of fixing holes, and fixing the outer mesh hollow cylinder and the inner mesh hollow cylinder at the same end; two flexible padding rings, each having a plurality of fixing protrusions, and detachably padding the long curved openings of one of the fixing rings with one fixing protrusion plugged in one corresponding fixing hole; a top connector, removably connected to one fixing ring, having a connecting opening for connecting to an inline fan; and a bottom cover, connected to the other fixing ring. Activated carbon granules are filled between the two mesh hollow cylinders.

Abstract: A dehumidifying element includes a plurality of sheets that have moisture adsorption and desorption properties and that are stacked on top of each another. At least some of the sheets each have an irregular shape. The sheets each contain a hygroscopic agent having properties of a re-moistening-type glue that exhibits adherence when adsorbing moisture and that solidifies when being dried. The sheets are bonded to each other by the hygroscopic agent.

Abstract: An air filtering system includes a main system and a filtering module. The main system includes a main body having an air inlet, an air flow cover having an air outlet, and a primary filtering core replaceably disposed in the main body, wherein the air flow cover is detachably coupled at the main body to form a basic air filtering mode for filtering air from the air inlet to the air outlet through the primary filtering core. The filtering module is detachably coupled between the main body and the air flow cover to form an advanced air filtering mode, wherein the filtering module includes a secondary filtering core arranged for filtering the air after passing through the primary filtering core and before existing the air outlet.

Abstract: A filter arrangement may include a filter element and a gasket element. The gasket element may include a substantially circular flow-through opening and a locking collar. The locking collar may be arranged along a circumference of the flow-through opening with respect to a circumferential direction. The locking collar may form a hollow cylindrical installation space. The filter element may include a filter element body and a substantially hollow-cylindrical counter locking collar. The counter locking collar may include an open axial side and a covered axial side which may be spaced apart from each other with respect to an axial axis. The covered axial side of the counter locking collar may be covered by said filter element body. The counter locking collar may be at least partially inserted into the hollow cylindrical installation space of the locking collar.

Abstract: An air cleaner assembly is described and shown which includes a housing having an air flow inlet, an air flow outlet and a housing body and access cover. A serviceable filter cartridge is positioned within the housing. A projection/receiver arrangement providing for engagement between the cartridge and the housing is provided. The projection/receiver arrangement can be configured in a manner that inhibits undesired motion of the cartridge, once installed. An example projection/receiver arrangement is provided, which includes a serpentine receiving groove on the access cover and a serpentine projection on the filter cartridge. Example filter cartridge features are described.

Abstract: An external brace for a filter element is described. The brace is configured to wrap around an exterior of a filter element having a filter media pack. The brace helps to support the filter media pack during filtering operations by preventing outward flexing of the filter media pack caused by fluid flowing through the filter media. In some arrangements, the brace interfaces with a filtration system housing to provide additional support to the filter element.

Abstract: A gas trap assembly including a base connector housing including an inflow port and an outflow port, a reservoir fluidly connecting the inflow port to the outflow port, and a grooved porous media located within the reservoir. The grooved porous media including a plurality of grooves and composed of a material having a plurality of pores of a selected size. The grooved porous media fluidly divides the reservoir into two portions in such a way that a working fluid flowing from the inflow port to the outflow port must flow through the plurality of grooves and the plurality of pores of the grooved porous media. The plurality of grooves and the plurality of pores are configured to prevent gas from passing through the grooved porous media.

Abstract: Various example embodiments relate to a filtration system. The filtration system comprises a housing having a first housing end and a second housing end. The housing defines a central compartment therein. The housing comprises a first alignment portion disposed on the first housing end. The filtration system further comprises a filter element positioned within the central compartment of the housing. The filter element has a first filter end and a second filter end. The filter element comprises filter media and a second alignment portion disposed on the first filter end. The second alignment portion is complementary to the first alignment portion. The installation of the filter element within the housing causes the first alignment surface and the second alignment surface to align to provide for engagement of a radial seal between the filter element and the housing.

Abstract: A reusable air filter and methods are provided for filtering air being conducted to an air intake of an internal combustion engine. The reusable air filter comprises a filter medium configured to pass an airstream and entrap particulates flowing within the airstream. The filter medium is comprised of cotton gauze disposed in a sinusoidal arrangement that provides a filtration surface area that is larger than a perimeter area of the filter medium. An end cap and base may be configured to retain the filter medium therebetween. The base provides an interface between the air filter and an air inlet of the engine. The filter medium may be disposed in a flat, panel shape that is bordered by a supportive tray. Support rods may be embedded within the tray to prevent bowing of the tray due to air pressure when coupled with an air box of the engine.

Abstract: A filter element has an upstream and downstream side. A filter media assembly of the filter element has an upstream side and a downstream side and has a first filter media layer and a second filter media layer that is adjacent to the first media layer. A substantial portion of the first layer and second layer are uncoupled, and at least one of the first media layer and second media layer comprises binder fiber. The second media layer has a mean flow pore size equal to or smaller than the first media layer. A support layer system is adjacent to the downstream side of the filter media assembly, and a first wire mesh layer is adjacent to the support layer system. At least the first media layer, second media layer, support layer system, and first wire mesh cooperatively define pleats at a pleat packing density of greater than 125%.

Abstract: Filter media having generally tetrahedral shaped flow channels is described. The filter media is generally formed by a flat filter sheet and a formed sheet. The formed sheet may be formed by a curves and/or pleats in the sheet. The curves and/or pleats form the tetrahedron channels. Embossments, such as dimples, are provided on the crests formed by the curves and/or pleats. The embossments help to maintain spacing between adjacent layers of the filter media, thereby increasing dust holding capacity and decreasing pressure drop over similarly configured filter media not having the embossments.

Abstract: A coalescence filter including an inlet for supplying the gas to a filter element present in the coalescing filter, which filter element includes a coalescence medium for coalescing at least one disperse liquid phase during a displacement of a gas through the coalescence medium in a flow direction. The filter element downstream of the coalescence medium includes a drainage medium for draining the at least one coalesced disperse phase leaving the coalescence medium. The filter element contains a barrier layer positioned downstream of the coalescence medium, where the coalescence medium and the barrier layer are held at a distance from each other by one or more spacers to provide a drainage zone in the drainage layer of a drainage medium between a surface of the coalescence medium facing the barrier layer and the barrier layer for draining the coalesced disperse phase in a drainage direction.

Abstract: An internal combustion engine includes an engine block including a cylinder, a horizontally oriented crankshaft, an air-fuel mixing device configured to provide an air-fuel mixture to the cylinder, and an air filter assembly configured to provide filtered air to the air-fuel mixing device. The air filter assembly includes a housing comprising a first housing end portion and a second housing end portion and defining an interior volume, a filter element positioned within the interior volume dividing the interior volume into a filtered volume and an unfiltered volume, a gap between the filter element and the housing configured to allow air to flow between the filter element and the housing, an air intake, and a filtered air outlet.

Abstract: A two-stage separator system having a housing extending between a first end and a second end. The housing defines a housing inlet, a separator outlet towards the second end, and a filtration outlet on the first end. A filter assembly has a first sheet of filter media coupled to a second sheet of filter media mutually defining a plurality of flutes extending in an axial direction. The filter assembly defines an inlet flow face and an outlet flow face. The filter assembly is disposed in the housing and coupled to the housing about the filtration outlet such that the outlet flow face is in fluid communication with the filtration outlet. The inlet flow face of the filter assembly has an axial flow face length.

Abstract: A filter cartridge and filter assembly using the filter cartridge is provided. The filter cartridge having a contoured end member to angularly orient and/or axially orient the filter cartridge, and particularly a seal thereof, relative to a filter housing. The filter housing is reconfigurable to allow it to be used in different locations having different spatial configurations.

Abstract: A filter element has a filter medium body and sealing material strips extending at least partially circumferentially in a circumferential direction of the filter medium body at an inflow side of the filter medium body and at least at one additional side of the filter medium body. A first one of the sealing material strips carries at least one holding tab. The at least one holding tab projects past the first sealing material strip. The at least one holding tab is embodied at least partially of a material of the first sealing material strip. A filter device with such a filter element arranged in a filter housing is provided.

Abstract: An air cleaner assembly is disclosed, along with related methods. In one aspect, the air cleaner assembly has a housing including a housing body and a removable cover that together define an interior volume for holding a filter cartridge. The housing body can include a first plurality of lugs, wherein each of the first plurality of lugs has a first engagement surface disposed at a first angle that is oblique to a rotational plane of the cover. A second plurality of lugs can be provided on the cover, wherein each of the second plurality of lugs has a second engagement surface disposed at the first angle. A lock mechanism can also be provided that is disposed on the cover, wherein the lock mechanism includes a lock member axially movable between a locked position and an unlocked position to selectively secure the cover to the housing body.

Abstract: An inlet debris filter disposed within a manifold assembly and operable to filter refrigerant that flows through the manifold assembly. In some embodiments, the manifold assembly may be disposed within an air conditioning servicing system. In some embodiments, the inlet debris filter may be removable and serviceable.

Abstract: A component of an exhaust system, in particular of an exhaust system of an internal combustion engine, has a double-walled pipe which encloses at least one air gap. The double-walled pipe includes at least two layers positioned radially over each other and attached to each other at a plurality of fixing points distributed over a periphery. At least one of the layers is a structured layer and has a wave structure with a plurality of wave crests and wave troughs distributed along the periphery. For manufacturing the component, at least one sheet metal strip is provided, which is structured in sections to give it a wave form. A brazing material is applied at the intended fixing points. The sheet metal strip is then wound up to form the double-walled pipe. The latter is calibrated, and the layers are connected at the fixing points by induction brazing.

Abstract: A cartridge comprising layers of adsorbent sheet is described. The cartridge includes an indicator that characterizes the consumption state of the adsorbent within the cartridge. The indicator is applied in a way such that discrete areas of indicator are visible. These discontinuous areas of indicator may be applied to the outside surface of the cartridge. Alternatively, the discontinuous areas may be formed by cutting windows in the outermost layer of the cartridge and either coating indicator on the layer beneath the window, placing an indicator layer between the window and the layer beneath it or filling the window with an indicating plug of material so that the indicator is visible from the outside of the cartridge. The indicator layer and indicator plug embodiments allow the use of any indicator with any adsorbent.

Abstract: Liquid filter assemblies, features, components and methods are described. In general, a liquid filter cartridge is provided which includes features that help ensure that when the assembly is serviced, the cartridge positioned within the assembly is a proper one, in proper sealing orientation, for appropriate use. Features that can be used to provide for this include: a seal on the filter cartridge that defines a seal pattern non-orthogonal to a plane perpendicular to a central axis of the filter cartridge; and, a member of a projection/receiver arrangement on the filter cartridge which is orientated to engage a portion of a liquid filter assembly, for example a liquid flow collar, to allow sealing when the cartridge is a properly positioned cartridge and a properly configured cartridge. Assembly features are described. Also, a flexible radial projection arrangement providing snap-fit interaction between a cartridge and housing is provided. Methods of assembly and use as described.

Abstract: A gluing method of a filter cartridge includes: preparing a filter core and a filter frame; disposing them in a lower mold with the filter frame under the filter core; filling glue on top of the lower mold, extending the glue to a gluing segment of the filter frame and an outer surface of the filter core; pressing down an upper mold toward the lower mold to cut the glue into an inner glue segment and an outer glue segment. The inner glue segment is pressed in between the filter frame and the filter core, coated around the gluing segment to increase adhering area. Pressure from the upper mold enhances the adhering effect. The cutting removes surplus glue and the glue is formed into a desired shape, thus the method is quick, accurate and consistent.