Abstract: A first filter basket (20) sits down into a catch basin (10) and has an upper flange (24) that rests on a shoulder (14) provided in the catch basin (10) for supporting a grate (16). The filter basket (20) has expanded metal side and bottom walls which are adapted to pass liquid and catch particulate material larger in size than the wall openings. A geo-textile liner (42) is optionally positioned inside of the filter basket (20). The liner (42) is supported on a lower rim flange (26). Posts (40) on the rim flange (26) extend upwardly through openings (66) in marginal portions of the liner (42). A smaller second filter basket (72) is optionally supported inside the larger first filter basket (20). An absorbent pillow (90) may be positioned between the bottoms of the two filter baskets (20, 72) to catch and absorb oils and greases that are in the liquid that enters the catch basin (10).

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: An apparatus, system, and method are disclosed for multistage water separation. A first separation layer separates water droplets from a fuel flow by repelling the first water droplets. A coalescing layer may coalesce fine water droplets in the fuel flow. In one embodiment, a centrifugal separator directs the fuel flow tangentially to a filter wall and the centrifugal force of the fuel flow directed tangentially along the filter wall biases water droplets from the fuel flow. A second separation layer separates second water droplets from the fuel flow.

Abstract: Apparatus for filtering out and collecting debris at a storm drain includes upper and lower assemblies, each including a frame member and a filter member. Water passing through or alongside the filter member of the upper assembly is directed into the filter member of the lower assembly.

Abstract: Filtering package for infusion products including a thin cylindrical structure (1) at whose ends are firmly attached filtering diaphragms (2;2?) that make the resulting body of package (3), containing the infusion product, underformable.

Abstract: A filter assembly having a proximal end portion and a distal end portion is described. The filter assembly may include a feed inlet located at the proximal end portion and a first filter element in fluid communication with the feed inlet, the first filter element extending between the proximal end portion and the distal end portion of the filter assembly. Additionally, the filter assembly may include a second filter element in fluid communication with the first filter element, the second filter element extending between the distal end portion and the proximal end portion of the filter assembly. The filter assembly may also include a flow deflector located at the distal end portion of the filter assembly, the flow deflector being configured to deflect a flowable mixture exiting the first filter element toward the second filter element.

Abstract: An improved oil conditioning filter, for use with an internal combustion engine, includes a mechanically active filter element and a chemically active filter element containing a beneficial additive therein. The beneficial additive is provided to extend the useful life of lubricating oil in an internal combustion engine. The beneficial additive may include an antioxidant, an anti-wear agent, and/or a basic salt. In a preferred embodiment of the invention, the chemically active conditioning agent is provided in a plurality of particles disposed within the oil filter housing. The particles may be bonded together to form an integral porous filter element having spaces defined between the particles thereof. The particles are made either by a hot extrusion process or by a solvent process.

Abstract: A combination filter includes a filter housing having first and second inlet ports and first and second outlet ports. A first filter bowl is coupled to the housing. The first filter bowl inner surface defines a first cavity that is in fluid communication with the first inlet port and the first outlet port. A second filter bowl is coupled to the housing and is at least partially disposed within the first cavity of the first filter bowl. The second filter bowl defines a second cavity that is in fluid communication with the second inlet port and the second outlet port. A first filter is disposed within the first filter bowl for filtering fluid that flows between the first inlet port and the first outlet port, and a second filter is disposed within the second filter bowl for filtering fluid that flows between the second inlet and outlet ports.

Abstract: A Pool Sweep Filter Adapter provides connection between the inlet to a swimming pool leaf catcher basket and the pool vacuum hose, said hose is also attached to a pool vacuum head with an attached long tubular handle to move the head around the pool surfaces manually, or said hose is connected to an existing automatic pool sweep mechanism, for collection of leaves, hair and dirt into an existing said leaf catcher basket; in contrast to present methods that require the removal of the leaf catcher basket during vacuum cleaning of the pool that allows the leaves and debris to go directly to the pool pump and then to the pool main filter, said Pool Sweep Filter Adapter includes an option for a fine mesh filter bag to collect smaller leaf particles and dirt.

Abstract: A system to restrict and remove debris and pollutants from runoff water received from surrounding areas. A receptacle receives the runoff water, and a grate detains the heavier part of its solids burden. A first screen within the receptacle detains solids of lesser size. Water passed by the first screen encounters a tubular second screen in the receptacle which passes water that was additionally screened by it and sends it to a downstream system. A weir at a sensitive level in the receptacle can by-pass the second screen. The second screen is preferably rotatable.

Abstract: A two-stage, retrofit filter is adapted for use with an electrical discharge machine (EDM) includes nested inner and outer filtering elements that may be placed as a unit in the same tank and over the apertured standpipe used for a one-stage filter, such that the fluid to be filtered now flows through each of the multiple filter elements. The retrofit EDM filter may be configured for flow in either direction, though the usual arrangement is one whereby the fluid being filtered flows up through the bottom of the tank, out the apertured standpipe, and into the inner filter element. Preferably, the filter elements are cylindrical, pleated elements composed of a technical grade filter paper. In the preferred embodiment, a pressure-operated release valve is provided in conjunction with the inner filter, such that when a predetermined pressure is reached due to the entrapment of contaminants by the inner filter, the valve opens to allow the fluid to be filtered to flow through the outer filter.

Abstract: Disclosed is a fluid treatment element, such as a filter element, operable in a dead end mode or a crossflow mode. In certain embodiments, the fluid treatment element includes a multilayer composite formed into axially extending pleats. In certain other embodiments, adjoining pleats are in a laid-over state and pressed against each other over a substantial portion of their height. The fluid treatment element can be compact yet have a large surface area available for fluid treatment. Also disclosed are a fluid treatment element and a method, particularly an all fluoropolymer fluid treatment element and a method, for diffusively transferring material from one fluid stream to another fluid stream, for example, for transferring ozone into water. Further disclosed are a device and method for crossflow cleaning of fluid treatment elements.

Abstract: A fluid treatment element is adapted for cross flow filtration which includes a fluid treatment pack having first and second lengthwise ends, a fluid treatment layer that may be pleated, a first mesh layer disposed on a first side of the fluid treatment layer and a second mesh layer disposed on the second side of the treatment layer, the element defining a flow path for a process fluid to be treated passing in a lengthwise direction of the fluid treatment element inside the first mesh layer and a flow path for permeate passing through the second mesh layer. The first mesh layer may open onto the first lengthwise end with the second mesh layer including sealant at the first lengthwise end such that fluid can flow through the first lengthwise end into the first mesh layer but not into the second mesh layer. The element may include a core having a blind region in which fluid cannot pass therethrough and at least one regions where fluid can pass through the core.

Abstract: A concentric arrangement of bag-type filter sleeves 11, 12 of a filter insert are removably supported within a concentric arrangement of screens 60, 61 of an annularly-shaped basket 10a. The screens respectively support the filter sleeves against radial flow during filtration. A filter cartridge 37 is carried interiorly of the innermost filter sleeve and is configured to filter the liquid that has first been filtered in the filter insert and before the liquid can exit the filter vessel 30.

Abstract: A filtering system for swimming pools includes a cylindrical filter housing in which a filter bag is supported in a perforated liner. A skimmer housing is mounted on the cylindrical housing and skims water off of the surface of the pool, which communicates to the inlet chamber through a perforated skimmer basket which catches debris floating on the surface of the pool water. The main drain of the pool is connected directly to the inlet chamber. An outlet of the cylindrical housing communicates directly with the inlet port of a pump that returns filtered water to the pool.

Abstract: A filter coalescer cartridge for treating jet fuels comprising spaced apart filter/coalescer layers to effectively remove particulate contaminants and water from the transient fuel being treated.

Abstract: An oil separator includes a casing 1 and a rotor 2, said rotor being arranged rotatably within said casing and having a flow chamber 3 through which oil-laden air 4 can pass, with porous material being arranged in the flow chamber 3. At least one unit of porous material is arranged in the flow chamber 3 which includes outer layers of a porous metal 6 and an interlaid layer 7 comprising fibre material.

Abstract: A filtering system for filtering effluent in a septic tank including an outer secondary filter secured within a pipe fitting, wherein the outer secondary filter includes a central opening passing therethrough; an inner primary filter, wherein the inner primary filter is slidingly engaged within the central opening in the outer secondary filter; and a filtering connection element, secured between the outer secondary filter and an inner surface of the pipe fitting, wherein the filtering connection element filters effluent passing upward through the filter pipe fitting and wherein upon removal of the inner primary filter, the outer secondary filter filters the effluent entering the pipe fitting before discharge. Either or both of the outer secondary filter or the inner primary filter may be formed with a biocide to retard the growth of biological material on their surfaces.

Abstract: Systems and methods for controlling the presence and growth of microorganisms and biofilms in water lines is provided. The systems include, for example, a valved, multi-port control manifold for accepting inlet water to be treated and a filter for (1) reducing particulate physical matter, (2) further reducing particulate matter while also reducing the content of absorbable organics, and (3) physically removing microorganisms. The system further includes a mixing reservoir or chamber with specialized means for injecting active agents such as biocides for additional control of planktonic and sessile microbes. An optional pressurized storage vessel for retaining and delivering filtered and treated water is also disclosed. The methods include, for example, the step of introducing an aqueous cleaner derived from natural citrus botanicals into a water system.

Abstract: A suction strainer includes a hollow internal core tube and an external filtering surface built around the internal core tube. A plurality of openings are defined through the side wall of the internal core tube core. In some cases the openings through the side wall are constructed and arranged such that there is somewhat less open area near the downstream end than the upstream end of the internal core tube, and the amount of open area tapers between the upstream end and the downstream end. As a result, when liquid is drawn into the internal core tube through the plurality of openings, a substantially uniform inflow distribution may be defined along substantially the entire length of the internal core tube. The internal core tube functions as a rigid structural support for the external filtering surface, enabling the apparatus to withstand post-LOCA hydrodynamic forces.

Abstract: A filtering apparatus of T-shaped configuration includes a vertically extending filter element receiving tube and a horizontally extending outlet conduit portion. A removable tubular filtering element having a flexible seal surrounding the outer surface of the filter element at a lower end is engagable with an inner surface of the filter element receiving tube. A stationary filter element is disposed at a juncture of the outlet conduit with a central opening in the vertically extending filter element receiving tube wherein the flexible seal of the filter engages with and cleans the particulates from the stationary filter element upon insertion and removal of the tubular filtering element from the filter element receiving portion.

Abstract: A waste water filter comprises a shield comprising a vertical peripheral wall defining a shield interior. The shield further includes an inlet for the entry of unfiltered wastewater into the shield interior. A shield filter element is disposed within the shield interior. The shield filter element includes at least one filter surface having filter surface openings for the passage of relatively clear water while restricting the passage of solids larger than the openings. The shield filter element, when disposed within the shield, separates the shield interior into first and second interior locations. Unfiltered or partially filtered waste water in the first interior location is separated from filtered waste water in the second location by the shield filter element. The shield filter element is removable from the shield. Unfiltered or partially filtered waste water entering the shield interior after shield filter element removal will enter the first and second interior locations within the shield.

Abstract: A filter for removing solids from a liquid comprising a filter housing with an inlet and an outlet, a first filtration element nested within the filter housing and having a first plurality of openings, a second filtration element nested within the first filtration element and having a second plurality of openings for filtering grease and non-particulate substances, where the second filtration element has a shorter height with an upper end thereof being located below at least one opening of the first filtration element thereby allowing bypassing of the second filtration element. Alternatively, the filter may also include a third filtration element nested within the second filtration element and having a third plurality of openings where the second filtration element has a shorter height than the third filtration element, an upper end of the second filtration element being located below at least one opening of the third filtration element thereby allowing bypass of the second filtration element.

Abstract: A fryer system has a tub and a filter screen assembly located in the tub to filter cooking fluid. A filter pan or crumb catcher having a perforated surface is positioned above the tub to receive cooking fluid from a cooking vat of the fryer system. A pan is positioned between the filter pan or crumb catcher and the tub to receive cooking fluid and direct it to the tub, with the pan extending beyond outer edges of the filter screen assembly to substantially prevent the flow of cooking fluid from the filter pan or crumb catcher directly onto the filter screen assembly.

Abstract: A filtering system for filtering effluent in a septic tank including an outer secondary filter secured within a pipe fitting, wherein the outer secondary filter includes a central opening passing therethrough; an inner primary filter, wherein the inner primary filter is slidingly engaged within the central opening in the outer secondary filter; and a filtering connection element, secured between the outer secondary filter and an inner surface of the pipe fitting, wherein the filtering connection element filters effluent passing upward through the filter pipe fitting and wherein upon removal of the inner primary filter, the outer secondary filter filters the effluent entering the pipe fitting before discharge. Either or both of the outer secondary filter or the inner primary filter may be formed with a biocide to retard the growth of biological material on their surfaces.

Abstract: A customized pump, filtration, oxygenation and/or debubbler apparatus includes a first pump module, a filtration module, an oxygenation module, a debubbler module and/or a second pump module. Each module is formed of stackable support members with filtration, oxygenation and/or degassing membranes interposed therebetween.

Abstract: A modular insert for curb-inlet storm drains creates a composite collection system for trash and for oil or other hydrocarbons and related chemicals. A hopper contains a multitude of irregular, macroscopic fragments of a hydrophobic, compliant, oil-absorbent, copolymer material having high surface area. Preferably, the material is formed with a binder in a novel extrusion process. The fragments absorb and retain permanently a high quantity of oil and other chemicals passing through the hopper, while permitting a high water flow-through rate. The fragments are held in place by a removable bottom plate, which allows replacement of the filtering fragments, and an internal basket. Trash and debris are collected in the internal basket. The hopper is configured to be suspended in a storm drain adjacent to a curb inlet on a bracket and can be installed or serviced through a conventional manhole entry. The hopper has a side cutout that permit lateral overflow from one of the modular units to an adjacent one.

Abstract: A filtering system for filtering effluent in a septic tank including an outer secondary filter secured within a pipe fitting, wherein the outer secondary filter includes a central opening passing therethrough; an inner primary filter, wherein the inner primary filter is slidingly engaged within the central opening in the outer secondary filter; and a filtering connection element, secured between the outer secondary filter and an inner surface of the pipe fitting, wherein the filtering connection element filters effluent passing upward through the filter pipe fitting and wherein upon removal of the inner primary filter, the outer secondary filter filters the effluent entering the pipe fitting before discharge. Either or both of the outer secondary filter or the inner primary filter may be formed with a biocide to retard the growth of biological material on their surfaces.

Abstract: A modular insert for curb-inlet storm drains creates a composite collection system for trash and for oil or other hydrocarbons and related chemicals. A hopper contains a multitude of irregular, macroscopic fragments of a hydrophobic, compliant, oil-absorbent, copolymer material having high surface area. Preferably, the material is formed with a binder in a novel extrusion process. The fragments absorb and retain permanently a high quantity of oil and other chemicals passing through the hopper, while permitting a high water flow-through rate. The fragments are held in place by a removable bottom plate, which allows replacement of the filtering fragments, and an internal basket. Trash and debris are collected in the internal basket. The hopper is configured to be suspended in a storm drain adjacent to a curb inlet on a bracket and can be installed or serviced through a conventional manhole entry. The hopper has a side cutout that permit lateral overflow from one of the modular units to an adjacent one.

Abstract: A wastewater skimmings dewatering unit that includes a drip bucket having a bucket compartment having an open top defined by a threaded lip and a bottom through which a number of drain opening are provided; a locking ring with the center opening and an internally threaded inner edge that is companionately threaded to engage the threaded lip of the drip bucket; a dewatering sack constructed from nylon mesh screening having a top edge that is sized to fit over the threaded lip of the drip bucket such that a sack bottom is suspended above the bottom and held in place by screwing the locking ring onto the threaded lip of the drip bucket.

Abstract: A method and apparatus for collection and containment of hydrocarbons that may be spilled or leaked by equipment utilizing an internal combustion engine, transmission or fuel tank prevents pollution of the environment. Hydrocarbons accumulated in a spill collection apparatus are directed to a spill containment device where they are absorbed and solidified into a rubber-like mass. Solidification of hydrocarbons and retaining them within a hydrocarbon impermeable housing prevents them from contaminating the surface below the equipment and facilitates their handling for disposal.

Abstract: A storm drain filter is sized to cover the opening of a storm drain. It includes a top debris tray removably positioned within a bottom media tray. Each tray includes a peripheral trough surrounding a central overflow opening. The top tray is shorter in height than the bottom tray, so that a filter media receiving chamber is defined between the top tray and the bottom tray. Filter media is positioned in the filter media receiving chamber. A handle is attached across the central overflow opening of the top tray. In a first embodiment, the bottom surfaces of the top and bottom trays are perforated. In a second embodiment, the inner walls of the top and bottom trays are perforated. In either embodiment, water flowing into the filter is distributed around the top trough, passed through the perforated surface of the top tray, the filter media, the perforated surface of the bottom tray, and into the storm drain. Hydrocarbons and other contaminants are filtered by the filter media.

Abstract: A novel filter assembly for a drainage system stormwater curb and gutter-type catch basin is provided with spaced-apart frame elements that are joined to and carry a singular mesh fabric filter element, the mesh fabric filter element advantageously additionally functioning to hingedly interconnect the filter assembly frame elements into a unitary structure.

Abstract: A filtration apparatus for brewing coffee, tea or the like therein and allowing a user to directly drink the brewed liquid from the same filtration apparatus. The apparatus comprises a vessel, such as a container or cup, and a double filter assembly installed within the vessel. The double filter assembly comprises a lower filter, an upper filter, and an alignment rod connecting the lower and upper filters together for facilitating the installation of the double filter assembly into the container. The lower and upper filters engage the interior periphery surface of the container for preventing the contents, such as ground coffee beans or tea leaves, in the container from being consumed by the user but allowing the brewed liquid to pass therethrough.

Abstract: A water purifier using common advantages of natural and forced types operated without an external electric power source, resulting in high efficiency of water purification.

Abstract: A method and apparatus for removal of contaminants from fluid columns utilizes a solidifying polymer-based filtration media to extract pollutants, such as organic compounds and metals. Dissolved, emulsified or suspended contaminants are absorbed and solidified into an easily retrievable mass and retained within a replaceable filter container. Solidified contaminants may not leach when exposed to pressure limits currently used to determine landfill acceptability, may be incinerated as fuel for their BTU content or used as a component in the production of asphalt, roofing material or other tar-like compounds. Treated fluid columns exit the process containing acceptable levels of contaminants to permit free release into the environment.

Abstract: The present invention relates to a permanent espresso filter insert for insertion into an espresso machine, the insert comprising a substantially flat filter disc which is penetrated by a plurality of filter openings substantially in the flow direction of the medium to be filtered, with a perforated disc being designed and arranged downstream of the filter disc in flow direction in such a manner that the medium to be filtered is swirled and deflected to an increased extent. With the permanent espresso filter insert of the invention, it is possible to improve the formation of the head or cream also in espresso machines having low working pressures.

Abstract: A panel filter for filtering waste media comprises at least two stacked filtering medium sheets. Each sheet is shaped to have two substantially identically-shaped portions integrally interconnected along an intermediate portion thereof. The stack of filtering medium sheets is folded over upon itself along the intermediate portions of the filtering medium sheets to create an inner central cavity of said stack and mating marginal edges that are secured and sealed together to form an outlet opening at a point along the marginal edges. A filtration conduit is received in the outlet opening of the panel filter and communicates with the inner central cavity of the panel filter.

Abstract: The invention relates to an apparatus for removing solid components from a fluid in a trough (1) having a transport device (3) in the form of a transport trough (4) and a rotationally driven transport helix (6), the transport device (3) having at one end a solids outlet (9) and at the opposite end a sieving surface (15) at least in portions of the surface, in which the solid components are able to be sieved out of the fluid and are able to be transported to the solids outlet (9) via the transport helix (6) in the axial direction of the transport device (3).

Abstract: A combined cardiotomy and venous return reservoir which combines defoamed and filtered cardiotomy blood with venous blood in a common chamber and then passes the combined blood fractions through a second defoaming element to achieve positive mixing of the blood fractions before they exit the device.

Abstract: The brine purifying system employs a multistage filtering apparatus comprising a plurality of the same filter units piled up one over another to form a plurality of cascaded filtering stages. When the filter layers of the filter units are clogged with unsoluble matters, the operation of the multistage filtering apparatus is interrupted, then a solvent for the unsoluble matters is circulated through the multistage filtering apparatus to remove the unsoluble matters arrested by the filter layers by dissolving the same therein. Then, a washing liquid is circulated through the multistage filtering apparatus to wash the multistage filtering apparatus completely. The solvent and the washing liquid used for regenerating and washing the multistage filtering apparatus are recovered and are used for dissolving salt to prepare saturated brine. The unsoluble matters thus removed from the filter layers are removed by being precipitated in a precipitating tank.

Abstract: By this method, the fluid to be filtered is led through a filter bed formed of particulate filter particles, such as sand, which filter bed is retained in an upstanding annular space. The fluid is introduced to the interior part 15 of the annular space and is led transversely to the movement the filter bed, through it and away. The filter bed is provided on the inner wall of annular space with a microfilter, such as sieve grid 16, with a mesh size of 10 to 200 microns, whereby the heavy and flocculated dirt particles settling upon the microfilter are led down and away and are drawn off together with the particulate filter particles 32. To avoid stoppages of the microfilter, it is flowingly hydraulically cleaned from the inner space. Additionally, by introduction of water in the take-off space 11 there is produced a vortex bed, whereby at this space the withdrawal of the particulate filter medium is effected with a mammoth pump 17 known per se.

Abstract: A filter-purifier cartridge arranged so that a self contained tubular purifying element is inserted within the hollow core of a tubular filter; the inlet and outlet passages of the purifying element arranged to permit axial flow through the hollow core containing the purifying medium of said element, in combination with radial flow through the tubular filter.

Abstract: A filter-purifier cartridge arranged so that a self contained tubular purifying element is inserted within the hollow core of a tubular filter; the inlet and outlet passages of the purifying element arranged to permit axial flow through the hollow core containing the purifying medium of said element, in combination with radial flow through the tubular filter.

Abstract: A filter assembly is disclosed for use in coffee makers in which a pair of filters are supported on carrier means with the filters held firmly in place by securing means. The filters may be reused and reassembled on the carrier means with handle means associated with each filter so as to obtain the necessary grip on a filter to overcome the frictional engagement between the filter and the securing means.

Abstract: Method of carrying out filtration using semi-permeable membranes in apparatus of the type having a plurality of frustoconical sections defining an annular type space between the various sections, each section having a membrane thereon, the steps comprising passing a solution to be treated along the spaces between the various sections in converging and/or diverging flow paths.