Abstract: A filter canister assembly for receiving waste from a dental cuspidor includes a canister of generally conventional configuration, with an open upper end fitted with a canister closure, the canister containing a closed disposable filter basket. A hand grip on the closed filter allows a dental technician to hold and dispose of the filter basket without contacting waste material contained within the filter.

Abstract: A remote fuel filter kit that maintains the prime on a fuel system while changing the engine fuel filter or when the engine is off. A filter adapter is installed on the engine in place of the original fuel filter. The adapter directs the fuel from the engine to a remote filter attached to a remote filter head, and from the remote filter back to the engine. The remote filter head can be mounted in any assessable location and will accept the original fuel filter. The remote filter head has at least one check valve located in the passage from the engine to the remote filter head. The check valve prevents air from being admitted into the fuel system when the fuel filter is changed or during engine-off situations. Fuel hoses, mounting brackets and installation hardware complete the remote fuel filter kit.

Abstract: A locating and keying system for a filter system assembly employs protrusions having a selected location and shape, such as a spherical sector cap, a pie wedge, a square or a bead, which longitudinally protrude from the end receiving surface of the base. Corresponding dimples in the opposing surface of the cartridge are dimensioned for receiving the protrusion for locking the cartridge at a fixed angular position of the base.

Abstract: A fluid filter which comprises a canister having an open end and a closed end, the canister sealing to an adapter body to prevent leakage between the canister and the adapter body, the adapter body having a plurality of angled fluid inlet ports extending through the adapter assembly body into the cavity formed by the canister and the adapter body assembly, a threaded fluid outlet port extending through the adapter body, a threaded ring adapter for adapting the outlet port to a variety of filter receptacles, a multistage wire mesh filter element having a weave which is designed to prevent fluid contaminants from passing through the filter element while inhibiting the contaminant particles from becoming lodged in the filter mesh, the fluid inlet ports in the adapter body being formed at an angle to create a tornado type turbine fluid motion within the canister to suspend contaminants which are blocked from passage through the screen in the fluid and allow such contaminants to settle in the canister out of the f

Abstract: A spin-on water-separating fuel filter has a built-in central drain tube for providing a sump port at the connection end of the spin-on filter located near the fuel inlet and fuel outlet ports. Water removed from the fuel is collected in a sump at the base of the filter. The drain tube, supported in the bore of the filter element, has a sump end projecting into the sump, and an outlet end adjacent to and aligned with a central threaded opening at the connection end of the filter. The outlet end of the drain tube, self-centered near the threaded opening, has a captured gasket which forms the sump port. When the filter is installed on the mounting head, the outlet end of the drain tube is coupled to a short stub tube projecting from the center of the central threaded neck to form a sealed passage for evacuating water from the sump.

Abstract: A fuel filter having improved communication with a contaminant container employs a body with a fuel inlet and fuel outlet having a housing connected at its upper end to the body, the housing having a bottom opening therethrough. A filter element is retained within the housing, the filter element having a bottom end. An interior passageway is provided in the filter element in communication with the body fuel outlet, the exterior of the filter element being in communication with the body fuel inlet. A support plate is positioned within the lower end portion of the housing on which the filter bottom end rests. A contaminant container is supported to the housing bottom. The support plate has a spiral fluid passageway providing communication between the interior of the housing and the contaminant container, the passageway permitting liquid contaminant, such as water, to flow from the interior of the housing into the contaminant container.

Abstract: A filter assembly having a replaceable coalescing filter in which contaminants are separated from fuel, oil, or the like. The filter assembly has an outer housing that may be constructed from a cylindrical metal container and a top metal plate. A filter element is attached in a cantilever manner to the metal plate, by chemical bonding and/or mechanical locking, solely by way of an support member. The filter element is thus suspended from the plate leaving a clearance space between the bottom filter cap and the bottom of the filter container. No elements are disposed in the clearance space, thus maximizing the efficiency of the filter. The support member may be made of rubber or similar material suitable for sealing the inner and outer fuel chambers and for chemically bonding to the metal housing. The upper end cap of the filter element also may be chemically bonded to the element support.

Abstract: A filter assembly has a housing accommodating a filter element. One end cap of the filter element has a generally annular body with support fins projecting from one surface. A peripheral flange extends from the edge of the body and is spaced from the outer ends of the fins to allow differential expansion of the flange without undue stress. The flange carries two opposed sets of pegs for supporting respective sealing rings to allow the flange to seal between parts of the housing.

Abstract: The invention relates to a liquid filtration device, comprising a substantially cylindrical housing one end of which is closed and the other end of which is connected to a head provided with an inlet and an outlet, a filtration element being provided within said housing. According to the invention the housing is formed by a tube section of the desired diameter and cut at the desired length, said tube section being closed, at its end opposite from the head of the filtration device, by a bottom piece inserted therein with a sliding fit, the outer circumferential face of said bottom piece being sealed to the corresponding part of the inner circumferential wall of the tube section by means of at least one O-ring engaged in a corresponding groove, while the bottom piece end opposite from the head of the filtration device bears on a snap ring Provided within an inner circumferential groove of the tube section.

Abstract: A fuel filter cartridge is formed from a pair of shell sections which are joined along a roll seam to form a retaining shoulder. The sections have generally cylindrical walls which are symmetric about a central axis. One of the sections has a diameter greater than the other section. Angularly spaced arcuate protrusions or keys protrude radially from the cylindrical wall of the cartridge.

Abstract: A reusable fluid filter assembly includes a cylindrical housing, a top plate assembly, a top plate attachment member, and a replaceable coreless filter element. The housing has means for sealingly engaging the housing to the top plate, and a hollow central core having an open first end and being connected to the closed end of the housing at the second end. The central core has a plurality of fluid outlet perforations. The top plate has a rim, fluid inlet means and fluid outlet means extending through the top plate. The top plate attachment member has a tubular shape, and a fluid outlet port extending through it. The coreless filter element having annular end caps on first and second open ends is disposed in the housing. The fluid inlet means of the top plate are in fluid communication with a fluid inlet chamber defined by the filter element and housing. The central core extends into the first open end of the filter and the hollow cylindrical chamber of the filter element.

Abstract: An adapter which enables a person to use different, selected, sizes of inexpensive, readily available, oil or air filters to act as air filters to provide greater air filtration for hydraulic systems. The adapter includes a body having an axial central opening therethrough; an enlarged, cylindrical, central section having first and second opposed surfaces; a first end section extending from the first surface of the central section and having an enlarged, externally, threaded portion; a smaller, externally, threaded portion extending from the enlarged externally threaded portion; a reduced cylindrical section attached to the second surface of the enlarged, cylindrical, section of the body; and a male bayonet locking member fixed to the free end of the reduced cylindrical section of the body for engagement with a female receptacle member attached to a fluid reservoir.

Abstract: Embodiments of a fluid filtering assembly are shown and described, each embodiment including a valve head that routes fluid to and from a filter cartridge and that includes a valve system that automatically opens and closes when the filter cartridge is inserted and removed, respectively. The valve system preferably includes a generally-cylindrical piston with a hollow interior space, which receives a stem member. The stem member has a bottom-end seat or sealing member and has a central body shape that allows fluid to flow up through the piston interior space, either through or up around the stem member. Upon removal of the filter cartridge, the piston is biased to move down into an "off" position, to close both the inlet and outlet fluid passages. In this "off" position, the piston exterior surface blocks off radial fluid inlets and the piston interior surface seals with the stem bottom end seat to prevent fluid backflow out of the piston interior space.

Abstract: A filter system utilizing a coalescing-type filter element with an end cap which snap locks into a filter system. One embodiment includes elongated snap lock arms. Another embodiment includes shortened arms. A third embodiment includes a snap lock ring. The snap lock arms and the snap lock ring may include an extrusion for mating with a depression in the intake of the filter system. Alternatively, the snap lock arms and snap lock ring may include a depression for mating with an extrusion on the intake of the filter system. Further, the filter system may be arranged such that the end cap snap locks into an outlet of the filter system.

Abstract: A filter element has an internal coil spring which is magnetized to remove magnetizable particles from a stream of lubricating oil prior to the oil passing through an annular filter media. The annular filter media is part of a cylindrical filter element which includes an end cap that closes one end of the filter element and an internal sleeve which defines a hollow core. The filter element is disposed within a filter container having a cylindrical wall and a round end wall. The filter container is closed at one end by an end plate overlain by a cover plate. Lubricating oil to be filtered enters the container and accumulates in an annular space between the filter element and in an end space between the end cap of the filter element and the closed end of the housing prior to passing through the filter media.

Abstract: A water filter assembly mounted to an inner surface of a refrigerator and accessible from within a refrigeration compartment of the refrigerator. The filter assembly includes a first housing part, a second housing part, and a replaceable filter cartridge. The first and second housing parts cooperate to define a fluid-tight chamber for receipt of the filter cartridge. The first housing part includes an inlet port through which unfiltered water may be introduced into the chamber and an outlet port through which filtered water may exit the chamber. The second housing part surrounds a portion of the first housing part and provides a volume sufficient to hold the filter cartridge and any water within the chamber when the second housing part is released from the first housing part to replace the filter cartridge, and thereby prevents or minimizes spillage of water from the filter assembly during filter cartridge replacement.

Abstract: A water filter assembly mounted to an inner surface of a refrigerator and accessible from within a refrigeration compartment of the refrigerator. The filter assembly includes a first housing part, a second housing part, and a replaceable filter cartridge. The first and second housing parts cooperate to define a fluid-tight chamber for receipt of the filter cartridge. The first housing part includes an inlet port through which unfiltered water may be introduced into the chamber and an outlet port through which filtered water may exit the chamber. The second housing part surrounds a portion of the first housing part and provides a volume sufficient to hold the filter cartridge and any water within the chamber when the second housing part is released from the first housing part to replace the filter cartridge, and thereby prevents or minimizes spillage of water from the filter assembly during filter cartridge replacement.

Abstract: A sea water strainer for use with marine craft includes a reservoir forming member disposed intermediate two ends portions. The end portions are formed with inlet and outlet fluid channels which are selectively accessible and blockable to direct the flow through the strainer. Further, an arrangement for mounting the strainer is provided with inclined bores through which bolts may pass with their operational interface directed angularly upwardly for easy access by conventional tools.

Abstract: A fuel filter comprises of a adapter and a filter element within a can. The adapter provides a series of valves which are opened and closed by the attachment and detachment of the filter, thereby preventing spillage from the fuel pump when the filter is removed for replacement.

Abstract: A reusable fluid filter assembly is provided, comprising, a cylindrical housing having external threads adjacent its open end; a top plate assembly having internal threads and indexing means for preventing rotation of the top plate with respect to a filter mounting base after the filter is positioned; a top plate attachment member having a fluid exit port extending through it and internal threads for threading onto corresponding external threads on the filter mounting base; and a replaceable filter element. A sealing ring in an annular channel adjacent the external threads of the housing seals the filter assembly when the housing is threaded into the top plate. The top plate attachment member secures the top plate assembly to the filter mounting base and also seals against the open end of the filter element.

Abstract: Spent solutions from photographic processors are fed into a conduit (18) to which subsequently are added precipitating agents from a first source (22) and flocculating agents from a second source (28); so that, well grown or ripened clumps of flocculated solids are formed along the conduit before being emptied into a gravity collecting vessel and shipping container (38) from which clarified liquids are displaced by a mass (50) of accumulated flocculated solids, typically through a filter (58, 142, 150, 158, 162, 166, 220) for removal of any unsettled fines. Many of the clumps of flocculated solids become enlarged enough to individually extend across and substantially fill a cross-sectional area of the conduit. As a result, the enlarged clumps substantially block passage of and strain from the solution remaining fine particles which then adhere to the clumps.

Abstract: A reusable fluid filter assembly is provided, comprising, a cylindrical housing having external threads adjacent its open end; a top plate assembly having internal threads; a hollow central core having a plurality of fluid outlet perforations extending through it, and internal threads for threading onto corresponding external threads on a filter mounting base; and a replaceable coreless filter element. A sealing ring in an annular channel adjacent the external threads of the housing seals the filter assembly when the housing is threaded into the top plate. The hollow central core secures the top plate assembly to the filter mounting base and also seals against the open end of the coreless filter element.

Abstract: A one-piece plastic injection molded filter housing having first and second open ends, the first end being threaded to receive a separate water collection bowl, and the second end including an external annular recess. An injection molded end plate member includes a circumferential annular flange with an interior annular rib formed thereon, and an inward annular projection with an external thread formed thereon. Opposing, one-piece plastic upper and lower end caps include spaced flanges to receive the respective ends of a filter media therebetween. The upper end cap also includes an upper annular projection that has an internal thread. A hollow plastic molded center tube is used inside a cylindrical paper media. The upper end cap is screwed into the end plate member via the corresponding threads. The rib has an inner diameter less than the outer diameter of the second end of the housing.

Abstract: The present invention includes a liquid filtering filter head configured to receive a filter cartridge closure member, where the closure member has at least one seal member. The filter head has a generally cylindrical, inverted cup-like structure defining a chamber configured to receive the closure member and two openings in fluid communication with the chamber. Furthermore, the filter head features a guide for guiding a seal member as the closure member is inserted into the chamber, so that the seal member is prevented from becoming caught in the openings.

Abstract: The invention relates to a filter system, in which a filter case 3 and a filter cover 4 can be inserted or removed in easy and quick manner. On a cylindrical engaging portion of the filter case 3 with the filter cover 4, a plurality of projections 25 and a plurality of engaging recesses 26 engageable with each other are provided, and a vertical channel 26a extending in axial direction of the filter case 3 and a transverse channel 26b extending in circumferential direction are arranged.

Abstract: A fuel filter assembly (10) includes a filter head (12) having a fuel inlet (18) and a fuel outlet (20). A filter element (14) is attached to said filter head. A collection bowl (16) is attached to the filter element. The filter element includes an outer wall (36) with upper and lower turned in edge portions (62, 72). Upper and lower ring shaped members (64, 74) are in abutting contact with said turned in edge portions and are positioned intermediate of said edge portions and end caps (46, 48) of an annular filter medium (38). The end caps include central openings (54) surrounded by circular resilient gaskets (58). The filter element (14) is attachable by either of its ring shaped members to the filter head and collection bowl.

Abstract: A fuel filter comprises a head (10, 96) having an inlet (14, 100) and an outlet (16,102). The head has a pumping portion (18, 104) which includes a vertically extending stepped bore (46, 120) having movable bodies (86, 88; 132, 140) therein. The fluid area between the bodies (54, 126) is connected to a variable volume area (77, 160). The head is connected to an element (98, 266) by a nipple portion (186) which has a valve element (196) therein. An actuating projection (222, 272) is engagable with said valve element to open flow through said nipple portion when the correct element is attached thereto. The failure of the nipple portion to sufficiently extend in the element, which occurs when an improper element is attached, prevents flow through the nipple portion and renders the filter inoperable. The actuating projection is further supported on a central portion (220, 276) which prevents connection to a nipple portion that extends too far into the element.

Abstract: A fuel filter having improved communication with a contaminant container employs a body with a fuel inlet and fuel outlet having a housing connected at its upper end to the body, the housing having a bottom opening therethrough. A filter element is retained within the housing, the filter element having a bottom end. An interior passageway is provided in the filter element in communication with the body fuel outlet, the exterior of the filter element being in communication with the body fuel inlet. A support plate is positioned within the lower end portion of the housing on which the filter bottom end rests. A contaminant container is supported to the housing bottom. The support plate has a spiral fluid passageway providing communication between the interior of the housing and the contaminant container, the passageway permitting liquid contaminant, such as water, to flow from the interior of the housing into the contaminant container.

Abstract: A fuel filter assembly (10) for filtering diesel fuel includes a filter head (12), a spin-on replaceable element (13) and a collection bowl (15) removable from the element. The element includes a casing (52) with a turned-in edge portion at a lower end. An adaptor ring (69) is supported on said edge portion inside the element and includes an annular threaded portion (71). The collection bowl has an outer peripheral wall (74) with an annular threaded portion engaging the threaded portion of the adaptor ring. The outer peripheral wall of the bowl has an annular shoulder abutting the turned-in edge portion of said casing to clamp said casing between the adaptor ring and the bowl, when the bowl is attached to the element. The adaptor ring has a plurality of spaced ribs (70) with projections that extend upward and radially outward to maintain the filter medium (55) spaced from an inner wall surface of the casing. A resilient member (68) holds the filter medium between a top plate (62) and the adaptor ring.

Abstract: A filter assembly has a housing for supporting a filter element, a first quick connect sealing valve operatively connected to an inlet passageway in the housing, and a second quick connect sealing valve operatively connected to an outlet passageway in the housing.

Abstract: A disposable device for filtration and collection of blood during a surgical operation, which device comprises a housing with a cup-shaped portion, in which a wall section is forming a ledge in the reservoir inside the housing. A first self-supporting filtration element for venuous blood is upstanding from the ledge, and a second filtration element for cardiotomy blood is suspended from the cover, the two elements being arranged side by side in a parallel relationship. The filter elements have an elongate, oval cross-section.

Abstract: A filter canister assembly for receiving waste from a dental cuspidor includes a canister of generally conventional configuration, with an open upper end, fitted with a canister closure which engages with the upper end of the canister and which is secured to a disposable filter configured to fit within the canister. Embodiments are described wherein the canister closure is disposable and is permanently attached to the disposable filter; wherein the canister closure is snapped together with the filter; and wherein the filter itself has an annular ledge which seats with different sizes of canister, with the closure snapped into the upper end of the filter.

Abstract: A fluid filter which comprises a canister having an open end and a closed end, the canister sealing to an adapter body to prevent leakage between the canister and the adapter body, the adapter body having a plurality of angled fluid inlet ports extending through the adapter assembly body into the cavity formed by the canister and the adapter body assembly, a threaded fluid outlet port extending through the adapter body, a threaded ring adapter for adapting the outlet port to a variety of filter receptacles, a multistage wire mesh filter element having a weave which is designed to prevent fluid contaminants from passing through the filter element while inhibiting the contaminant particles from becoming lodged in the filter mesh, the fluid inlet ports in the adapter body being formed at an angle to create a tornado type turbine fluid motion within the canister to suspend contaminants which are blocked from passage through the screen in the fluid and allow such contaminants to settle in the canister out of the f

Abstract: A filter device has a housing with connections for a fluid and can be secured to a filter pot. The filter has a filter element secured by a holder. A closure prevents the undesired leakage of fluid. The closure has two sealing plates with at least partly bound openings in mutually staggered array in two different planes. The openings can be mutually moved under the effect of a power store for closing or opening the openings. As the filter pot is moved further away from the housing, the closure gradually seals at least one of the connections and/or the filter pot off from the environment. The filter device has a universally usable closure which can be economically produced, requires little space inside the device and operates reliable.

Abstract: An all-plastic filter assembly for filtering fluids includes a generally cylindrical injection molded plastic outer shell which has a closed base and an open opposite end and which defines a hollow interior which receives a modular filler cartridge. The outer shell is injection molded with a generally cylindrical mounting stem which is integral with the closed base and extends part way toward the open end of the outer shell. The filter cartridge includes a generally cylindrical filter element and a molded endplate and centertube member bonded to the filter element. The centertube portion of the molded member is received by the mounting stem as part of the positioning and mounting of the filter cartridge into the outer shell.

Abstract: Spent solution from photographic processors are fed into a conduit (18) to which subsequently are added precipitating agents from a first source (22) and flocculating agents from a second source (28); so that, well grown or ripened clumps of flocculated solids are formed along the conduit before being emptied into a gravity collecting vessel and shipping container (38) from which clarified liquids are displaced by a mass (50) of accumulated flocculated solids, typically through a filter (58, 142, 150, 158, 162, 166, 220) for removal of any unsettled fines.

Abstract: A modular oil filter is used in an engine with a spin-on type oil inlet port. An adapter is screwed onto the inlet port, and secured thereon by a lock nut. A backflow valve may optionally be secured between the lock nut and the adapter to cover the oil entrance(s) in the adapter. A replaceable oil filter element is coaxially located against a seal shoulder of the lock nut. A housing or canister surrounds the filtration element and releasably secures to the adapter. The filter element may have outwardly extending tabs, an inner or outer diameter releasably connected to a spring coil, or other means to releasably secure the filter element within the canister prior to being placed on the adapter/lock nut.

Abstract: A fuel filter assembly (10) for filtering diesel fuel includes a filter head (12), a spin-on replaceable element (13) and a collection bowl (15) removable from the element. The element includes a casing (52 ) with a turned-in edge portion at a lower end. An adaptor ring (69) is supported on said edge portion inside the element and includes an annular threaded portion (71). The collection bowl has an outer peripheral wall (74) with an annular threaded portion engaging the threaded portion of the adaptor ring. The outer peripheral wall of the bowl has an annular shoulder abutting the turned-in edge portion of said casing to damp said casing between the adaptor ring and the bowl, when the bowl is attached to the element. The adaptor ring has a plurality of spaced ribs (70) with projections that extend upward and radially outward to maintain the filter medium (55) spaced from an inner wall surface of the casing. A resilient member (68) holds the filter medium between a top plate (62) and the adaptor ring.

Abstract: The separator includes an all sheet metal shell having a bottom to which is secured a metal adaptor plate enabling a drain valve and a water detector to be attached to the bottom of the shell.

Abstract: An arc-shaped flange 32 is provided protrusively on the peripheral surface at the top end of a filter 30, and guide ribs 33 extending downward are formed on the lower surface at both sides of the flange 32, so that the ribs 33 are slid in a cutout 12 formed in an annular rib 11 to guide the filter 30, and the cutout 12 is covered by the flange 32 when the filter 30 is put into a tank body 10.

Abstract: A fuel filter system for conditioning fuel flowing from fuel supply means to an internal combustion engine, comprising a fuel filter head having a contaminant outlet port, and fuel inlet and fuel outlet ports respectively adapted for connection to the fuel supply means and to the internal combustion engine. The fuel filter system further includes a fuel filter cartridge having a filter element, with the fuel filter cartridge having an upper portion releaseably secured to a lower portion of the fuel filter head, defining fuel inlet and fuel outlet chambers which direct fuel from the fuel inlet port and fuel inlet chamber through the filter element to the fuel outlet chamber and fuel outlet port of the fuel filter head. A liquid bleed tube extends between the fuel filter head and the fuel filter cartridge, and a fluid flow conduit connects the bleed tube in fluid flow communication with the contaminant outlet port.

Abstract: The filter includes an end plate stamped and drawn from sheet metal and formed with four upright walls generally defining a square and having inlet openings therein. Relatively deep gussets are located between the walls for strengthening purposes. Located outwardly of the walls and gussets is a flat peripheral portion of relatively small area and defining a flat surface to which a sheet metal retaining ring is welded. The ring is seamed to the canister of the filter by a hem which hooks beneath a short radially extending lip of the canister.

Abstract: A water filter including a packing ring to seal up the gap between the casing and the top cover, which packing ring having downward projecting strips fitted into respective notches on the casing to stop the packing ring against rotary motion relative to the casing, two water sealing devices respectively mounted on a water outlet pipe on the top cover and a stub tube on the casing and having respective flanges forced to engage two opposite ends of the filter element and to prevent unfiltered water from entering the longitudinal center through hole of the filter element.

Abstract: A reusable liquid filtering system and a disposable liquid filter used in the liquid filtering system are provided for use with an internal combustion engine or pump. The liquid filter includes first and second end members and a liquid bypass valve is connected to and projects outwardly from the first end member whereby excessive oil pressure will result in opening of the bypass valve so that an emergency oil flow bypass is thereby provided. The disposable liquid filter is removably positioned within a container of the reusable liquid filtering system. A base is removably connected to the engine or pump and to an open end of the container for allowing removal and replacement of the liquid filter and for allowing neat and spill-free drainage of oil from the container when the base and the container have been removed from the engine or pump and when the base has been removed from the container.

Abstract: A filter unit for a modular filter assembly comprises a head (1), said head having a feed chamber (2) and a discharge chamber (3), and a casing (6) surrounding a filter element (4). Fluid flow from the feed chamber to the discharge chamber of said filter unit passes through said filter element. The head (1) is provided with a first inlet opening (21) and a first outlet opening (22) which communicate with said feed chamber (2), and the head (1) is provided with a second inlet opening (31) and a second outlet opening (32) which communicate with said discharge chamber (3).

Abstract: A new and improved engine coolant filter for removing particulate matter such as scale and rust from an internal combustion engine cooling system, the engine coolant filter comprising a filter element wherethrough coolant fluid may be circulated, the filter element including a housing having an input aperture and an output aperture, the housing also having filter medium disposed between the input aperture and the output aperture wherethrough coolant fluid may flow, and a manifold installed in series with a pressurized coolant line, the manifold having an input port and an output port, the manifold being removedly connected to the filter element such that coolant fluid flowing into the input port is circulated through the filter medium then out the output port, the manifold also having an automatic clogged-filter bypass valve whereby an unacceptable pressure differential across the ports caused by clogged filter medium shunts the coolant fluid around the clogged filter medium, the manifold further having a vis

Abstract: A fuel filter assembly (10) includes a filter head (12) having a fuel inlet (18) and a fuel outlet (20). A filter element (14) is attached to said filter head. A collection bowl (16) is attached to the filter element. The filter element includes an outer wall (36) with upper and lower turned in edge portions (62, 72). Upper and lower ring shaped members (64, 74) are in abutting contact with said turned in edge portions and are positioned intermediate of said edge portions and end caps (46, 48) of an annular filter medium (38). The end caps include central openings (54) surrounded by circular resilient gaskets (58). The filter element (14) is attachable by either of its ring shaped members to the filter head and collection bowl.

Abstract: In a Fuel Filter arrangement for an internal combustion engine comprising a prefilter and a main filter mounted to the engine by a filter holder, the filter holder has a recess receiving the prefilter, which forms a plug-in unit removably inserted in the recess and position-locked therein.

Abstract: A filter unit comprises a housing containing a filter element. The housing includes an inlet for fluid and an inlet passage which passes fluid to the filter element. An outlet passage conveys filtered fluid from the element to an outlet to the housing. The inlet passage includes a valve which can close the inlet passage. When this happens, a by-pass valve opens and connects the inlet to the housing direct to the housing outlet. An anti-backflow valve is provided in the outlet passage to prevent fluid passing back down the outlet passage to the filter element. The filter element can then be changed. A re-pressurization valve is provided to pass fluid to the element while the inlet passage is still closed and a vent port vents air from the element during this re-pressurization. Once re-pressurization is complete, the vent port and the re-pressurization valve are closed and the inlet valve opened so that filtration recommences.

Abstract: A manifold mounted liquid filtration system including a disposable filter cartridge having first and second radial flow filtration stages containing filtration media of uniform porosity. A first stage includes a pair of annular, concentrically mounted, fibrous sediment and cast carbonaceous filter media. A second stage includes an annular cast carbonaceous filter media. Porous stage separators sequentially direct liquid flow into cavity spaces between the sidewalls of each stage and a liquid impermeable housing where the flow is radially re-directed inward to a center outlet bore. The first stage filters suspended sediments, lead and other heavy metals. The second stage removes suspended bacteria, parasites volatile organic contaminants, herbicides, pesticides, industrial and agricultural contaminants, and the like. Various cartridge constructions having alternative O'ring sealed end caps and internal arrangements of stage separators are disclosed.