Abstract: A filter media for physically separating agglomerations of abrasive particles from a chemical-mechanical polishing (CMP) process slurry stream. The media is provided as being formed of at least one fabric sheet having a first and second surface defining a first thickness dimension of the sheet therebetween, with the fabric being woven of polymeric monofilament fibers. In service, the slurry stream is supplied to the first side of the filter media, and is passed through the media to the second side thereof such that at least a substantial portion of the agglomerations of abrasive particles are retained on the first side of the media.

Abstract: A pair of filter cloths including a feed passage connector for a plate-type filter press is disclosed herein. The filter cloths include first and second tubular members each having opposed first and second free ends and through bores extending continuously from the first free end to the second free end of each of the first and second members. The first free end of the first member is connected to the first filter cloth with the respective cylindrical bore in coaxial alignment with the first feed opening and the second free end of the second member is connected to the second filter cloth. A third tubular member is provided having opposed third and fourth free ends and a radially outer surface and a central bore defining a feed passage. The radially outer surface of the third member is snugly received coaxially within the through bores of the first and second members to sealingly interconnect the first member to the second member.

Abstract: An auxiliary filter assembly is for use in a skimmer of residential swimming pools. The assembly comprises an adaptor collar and a cleanable filter basket. The adaptor collar is substantially flat and is for placement on a rim of a below water surface opening within the skimmer. The cleanable filter basket is made of a water porous material. The filter basket has an open top with a substantially rigid stabilizing ring permanently positioned in an edge defining the open top. The ring is dimensioned to rest on the adaptor collar. Swimming water debris is trapped in the filter basket as pool water is pulled through the filter basket on its way to a primary filter apparatus. The filter basket is easily separated from the adaptor collar, cleaned as needed and replaced.

Abstract: A portable liquid-solid separator tank having a bed with a drain, surrounding sides and a dividing wall. A grate overlays the interior of the vessel, bed, and sides, and forms the dividing wall. A filter overlays the grate, extending up the sides and covering the top and the dividing wall. The separator, which may be vacuum loadable, is filled with a sludge which is then separated from the liquid it contains by gravity and hydrostatic pressure which force the liquid through the filter. Liquid is drained out of the bottom of the vessel and the solids are transported within the vessel. The solids are removed through a gate that may be provided in the tank, or by using a hydraulic lift system in much the same manner as a garbage truck empties a municipal dumpster. The filter is removed with the solids and usually discarded.

Abstract: A screening screen assembly for a vibratory screening machine including an apertured plate having side edge portions with first apertured bands extending between the side edge portions and second unapertured bands alternating with the first bands, the second bands having a wider width than the borders between the apertures in the first band, and an undulating screening screen having ridges and troughs between the ridges extending crosswise to the first and second plate bands and being secured thereto.

Abstract: A screen for a vibratory shaker having a frame with multiple openings. Screen modules or plugs are disposed in each opening. Further disclosed is a mounting apparatus for securing the screen plugs in the openings and a support strip for supporting part of a screen having at least one upturned finger projecting above the top surface of the support body configured for contacting and supporting at least a part of a raised portion of the frame. A plug or module disposed in an opening of a positioning member of a screen assembly for a vibratory separator receives fluid with material therein for separation therefrom. Additionally disclosed is a method for making a plate mesh combination.

Abstract: Well screen assembly for use in horizontal wells and other situations where tensile, torsion and bending forces can damage well screens which are welded to their end supports provides a floating mounting which eliminates welding of the screen segments. A pair of complementary inner and outer slip rings are provided at one end of the well screen assembly with the inner ring being in sealed relationship with a screen segment and the outer ring being integrally affixed to an outer protective cover member and an axial support member such as a pipe base member or a tubular end fitting. The inner ring is free to slide and rotate relative to the outer ring.

Abstract: A filter is provided which combines a woven wire mesh over a supporting body. The supporting body is typically a metal perforated tube which provides fluid communication between the well bore and the production equipment string. The woven wire mesh acts as a filter to prevent the influx of sand particles, provides openings oriented at various angles relative to its surface, so that some area is available for fluid entry even when particulate matter is lodged on the surface above an opening, provides interior channels that allow fluid to travel from one location on the mesh surface to another location over an opening into the supporting body, and does not provide "straight-through" openings, thus forcing the fluid to make multiple turns to pass through the mesh, thereby dissipating the fluid's energy and increases the mesh's erosion resistance. When particulate matter accumulates on the mesh's surface, the resulting particle cake remains porous, heightening the filter's resistance to plugging.

Abstract: A filtration system for storm drain collection boxes includes a helical coil frame, open at both ends, which coil frame is attached at an exit end to a vertical exit side wall of the collection box with the exit end aligned with a collection box outlet opening. The opposite, inlet end of the coil frame is suspended from a ceiling of the collection box, and a filter fabric "sock", which is also open at both ends, is positioned surrounding the coil frame. The inlet end of the coil frame is positioned at a level below the ceiling of the collection box. The filter sock normally filters out silt, sediment and solid materials from storm water run-off before the water enters the storm drainage system but the open inlet end of the coil frame and sock acts as an overflow during flooding conditions to permit storm water to bypass the filtration provided by the filter sock while still filtering out solid materials via a wide mesh screen.

Abstract: The invention resides in apparatus and methods for isolating and collecting cells from donor tissue for later use in medical procedures. The apparatus includes a sealed enclosure, at least one screening material inside the enclosure, an inlet port configured to conduct a fluid through the screening material, and an outlet port for receiving the fluid from the screening material and conducting the fluid out of the enclosure. A material to be screened is placed inside or conducted into the enclosure. Screened material is entrained in the fluid. The fluid carries bits of the material through the screening material and out of the enclosure for later separation from the fluid. Preferred embodiments include a series of screening materials of decreasing pore size, usually in the range from ten to one thousand micrometers in diameter.

Abstract: A screen basket for filtering an aqueous fiber suspension includes a cylindrical foraminous filter element, anchoring collars surrounding and fixed to opposite ends of the filter element, at least two support rings surrounding the filter element, and support rods for adjusting the support rings between axially contracted positions disengaged from the anchoring collars, and axially expanded positions engaging the anchoring collars and axially tensioning the filter element. In a first embodiment, the anchoring collars are relatively flexible. This allows the anchoring collars to be deformed for insertion of the cylindrical foraminous filter element within the support rings. Alternatively, the upper and lower support rings are divided into segments that are easily disassembled and reassembled to facilitate removal of a defective cylindrical foraminous filter element and installation of a new filter element.

Abstract: A method is provided for fixedly joining a cloth, a cloth-like fabric or a synthetic mesh to a rigid or semi-rigid hub to form a seal, which secures the cloth, the cloth-like fabric or the synthetic mesh to the hub by enclosing the edge of the material between the neck of the hub and a ring, and causing the fusing of the hub and ring through induction heating of a bonding agent The assembly is advantageously used as a filter screen in a filter press.

Abstract: A screening screen assembly for a vibratory screening machine including an apertured plate, and a subassembly of an undulating support screen and fine screening screen and finer screening screen bonded to each other by a fused plastic grid and bonded to the apertured plate. A method of fabricating a screening screen assembly for a vibratory screening machine including the steps of providing a support screen, superimposing a plastic grid onto the support screen, superimposing a finer screening screen onto the fine screening screen, applying heat and pressure to the superimposed screens to fuse the plastic grid and thereby form a flat bonded laminate subassembly by causing the fused plastic grid to permeate the fine screen and the finer screen and the support screen, forming the bonded laminate subassembly into an undulating shape, providing an apertured plate, and bonding the undulating bonded subassembly to the apertured plate.

Abstract: A bone particle collecting unit (30) has first (32) and second (34) interfitting housing members capturing a cylindrical screen basket assembly (64). Bone particle containing effluent from a surgical site is received through a port (40) in the first housing member (32) into the screen basket assembly (64). Suction is applied from a port (56) in the second housing member (34) to remove liquid which passes through the screen basket assembly. The screen basket assembly (64) includes a disc (66) which frictionally receives one end of a cylindrical screen (70) with the other end o the screen received about a rib (42) formed in the first housing member (32). Disc (66) of the screen basket assembly is received on guide ribs (58) to seat the assembly in the second housing member (34).

Abstract: A screen assembly for a vibratory screening machine including a frame in the nature of a plate having spaced apertures therein, spaced frame members on opposite sides of the apertures, a screen formed in an undulating shape having substantially parallel ridges with downwardly sloping sides, troughs formed between the downwardly sloping sides for conducting material which is being screened, undersides on the troughs, bonds for securing the undersides of the troughs to the spaced frame members which are located on opposite sides of the apertures, and channels at the sides of the plate for securing the frame to a vibratory screening machine.

Abstract: A solid-liquid separating filter media (4) for sewage, waste water, etc. comprising a mono- or multi-layered filter screen (3) in which a number of filaments (1) are closely aligned in parallel and crosswise bonded to hoops (2) at predetermined points thereof to form integral blind-like structure.

Abstract: A progressive gap sand control screen comprising a plurality of parallel ribs spaced around an axis and a screen wire wrapped around the plurality of ribs having turns which extend along the length of the plurality of ribs such that adjacent turns have gaps therebetween, the gaps forming a gap profile in which the gaps near the upper end of the sand control screen are narrower than the gaps near the lower end of the sand control screen, the width of the gaps near the upper end of the sand control screen being less than the diameter of the particles which cause erosion, the gap profile includes a variable gap section near the upper end of the sand control screen and a constant gap section below the variable gap section, the variable gap section having a linear profile, a step type profile, or a nonlinear profile.

Abstract: A self supporting filter plate assembly having two opposed screen sections with inwardly shaped deformations which engage each other to maintain a planar surface of the screen sections at a predetermined spacing. The screen sections releasably engage each other. Inwardly directed retaining pins of an exterior frame removably support the screen sections in place within the frame. Each of the screen sections include edges which are bent at 90.degree. with respect to a central planar portion of each screen. The edge portions of the two screen sections interengage with each other by a projection in an inner surface of an edge portion of one screen section engaging with a recess extending from an outer surface of an edge portion of the other screen section. In addition, spaced openings in the edge portions, on opposed side edges of both screen sections, interengage with the inwardly directed retaining pins extending from an inner surface of opposed sides of the frame.

Abstract: A filter for filtering oil flowing through a fluid flow passage extending through the inside and outside of a plug forming part of a relief valve of a vane pump. The filter comprises a roll-shaped sheet formed of steel sheet spring and taking a generally cylindrical form. The roll-shaped sheet has overlapping first and second end sections, which are opposite to each other in a peripheral direction of the roll-shaped sheet. The roll-shaped sheet is located in the fluid flow passage and fitted on an outer peripheral surface of the cylindrical member. The roll-shaped sheet is formed with many through-holes having the size to allow the fluid to pass through the through-holes but trap particles for removal.

Abstract: The present invention is directed to a continuous, portable dredging system that employs a series of screens and gravity separation devices with flocculation to remove sediments from the dredged slurry. The system produces a treated water stream having low solids content and a recovered solids product having a low water content.

Abstract: A hollow fiber membrane module comprising (a) hollow fibers, (b) a fastening member for fixing the ends of the hollow fibers while leaving them open, and (c) a structural member for enclosing and supporting the fastening member, the hollow fiber membrane module being useful in the filtration of water by suction from the surface to the inside of the hollow fibers with intermittent or continuous cleaning of the membrane surfaces of the hollow fibers, characterized in that the hollow fibers comprise a textile fabric containing hollow fibers as the weft and the cross-section of the fastening member perpendicular to the hollow fibers is shaped like an elongated rectangle. In this module, the hollow fibers rarely cohere together into a mass, and the membrane surfaces of the hollow fibers can be efficiently cleaned concurrently with the filtration, so that the loss of the filtering function is minimized.

Abstract: A method for the removal of solid contaminants which utilizes two rotating mesh screen containers designed to pass the food therethrough while trapping the solid contaminant. The rotation of the first cylindrically-shaped mesh screen causes the food to pass through because of the centrifugal force leaving behind a portion of the solid contaminants. The second mesh or membrane-like placed around the first screen but rotated in the opposite direction is also utilized to trap solid contaminants which are large enough to be trapped by the mesh screen when it is not oriented so as to pass through the screens along its length. Different spacings in mesh and different rotation velocities are utilized to change contaminant screen characteristics.

Abstract: A strainer formed by a body member defining an inlet passage for receiving the fluid and an outlet passage for discharging the fluid. A chamber is connected to the outlet passage and an internal passage connects the inlet passage to the chamber. A separator is disposed in the chamber for separating particles from the fluid as the fluid passes through the chamber. The fluid is thus routed into the inlet passage, and through the inlet passage to the chamber where the particles are separated. The fluid is then passed to the discharge passage for discharging the fluid to a conduit.

Abstract: The invention resides in apparatus and methods for isolating and collecting cells from donor tissue for later use in medical procedures. The apparatus includes a sealed enclosure, at least one screening material inside the enclosure, an inlet port configured to conduct a fluid through the screening material, and an outlet port for receiving the fluid from the screening material and conducting the fluid out of the enclosure. A material to be screened is placed inside or conducted into the enclosure. Screened material is entrained in the fluid. The fluid carries bits of the material through the screening material and out of the enclosure for later separation from the fluid. Preferred embodiments include a series of screening materials of decreasing pore size, usually in the range from ten to one thousand micrometers in diameter.

Abstract: A screening screen assembly for a vibratory screening machine including an apertured plate or frame, and a bonded subassembly of an undulating support screen and fine screening screen and finer screening screen bonded to each other by a fused plastic grid and bonded to the apertured plate or frame. A method of fabricating a screening screen assembly for a vibratory screening machine including the steps of providing a support screen, superimposing a plastic grid onto the support screen, superimposing a finer screening screen onto the fine screening screen, applying heat and pressure to the superimposed screens to fuse the plastic grid and thereby form a flat bonded laminate subassembly by causing the fused plastic grid to permeate the fine screen and the finer screen and the support screen, forming the bonded laminate subassembly into an undulating shape, providing an apertured plate or frame, and bonding the undulating bonded subassembly to the apertured plate or frame.

Abstract: In order to greatly shorten the filter exchange time required for detachably winding a filter (20) on the opening portions (2) formed in the outer circumferential surface of a filtration drum (1), projecting or recessed annular mounting portions (6) are respectively formed near edge portions of the outer circumferential surface of the filtration drum, to have portions (7) which prevent the wound filter from moving toward the center in the thrust direction of a main shaft (4) of the filtration drum and which maintain the filter liquid-tight, and the filter (20) is firmly fixed with fastening means (22).

Abstract: A selectively removable gravitational and vacuum sludge filtration apparatus and method that provides for retrofit into a container and separation of the sludge solids from the sludge liquids therein. A pair of spaced vertically oriented filter assemblies each define a filtrate cavity therein and are connected by separator plates. The filter assemblies permit the flow of sludge liquids into the filtrate cavity, but not sludge solids. A separator divides each filtrate cavity into two cavity sections, a first filtrate cavity and a second filtrate cavity. Filtrate drains into first and second filtrate cavities by either vacuum or gravitational drainage, depending on the level of sludge within the container. Vacuum drainage occur in first or second filtrate cavity if either cavity is situated below the level of the sludge within the container. A first and second filtrate evacuation means provide for the evacuation of filtrate from the first and second filtrate cavities by the use of a vacuum pump.

Abstract: A wringer bowl assembly is fabricated from a base plate, a top plate, and a plurality of side faces extending therebetween. The side faces extend through a single plane eliminating all need to work the side faces to create a bowl. Each of the side faces includes a an output hole which is where a fluid mixture is separated into its fluid and solid components. Screens extend across the output holes to prevent the solid component of the fluid mixture from passing therethrough. Face plates cover the side faces protecting the side faces from wear due to the movement of the solid component along the sides of the wringer bowl assembly. Each of the face plates includes at least one blade which aids the movement of the fluid mixture from the base plate to the output holes to be separated.

Abstract: Screen assemblies having a plurality of supports assembled with peripheral screen frames with screen cloth extending fully over the assemblies. The supports are assembled with each other and with the screen frame using dovetail mechanisms. Each support includes a cell structure having walls defining open cells. The walls have an elongate cross section to provide thickness to the structure. A thin support grid is integrally formed with the walls with the top of the support grid and the top of the walls lying in the same plane. The top of the surrounding frame also lies in this plane. The walls and the frame each have energy directors for ultrasonic bonding to the screen cloth laid over the assembly. The lower edge of the walls and of the screen frame also lie within a plane and have energy directors for receipt of a larger mesh closure screen to retain self-cleaning sliders or elements within the cells. The cells have no straight edges in plan.

Abstract: A filter is provided which combines a woven wire mesh over a supporting body. The supporting body is typically a metal perforated tube which provides fluid communication between the well bore and the production equipment string. The woven wire mesh acts as a filter to prevent the influx of sand particles, provides openings oriented at various angles relative to its surface, so that some area is available for fluid entry even when particulate matter is lodged on the surface above an opening, provides interior channels that allow fluid to travel from one location on the mesh surface to another location over an opening into the supporting body, and does not provide "straight-through" openings, thus forcing the fluid to make multiple turns to pass through the mesh, thereby dissipating the fluid's energy and increases the mesh's erosion resistance. When particulate matter accumulates on the mesh's surface, the resulting particle cake remains porous, heightening the filter's resistance to plugging.

Abstract: A filter for a liquid spraying device such as an airless paint sprayer. The filter separates unwanted foreign material and clumps from a liquid before the liquid is pumped into a liquid spraying device. The filter is removably mounted on a hose of a liquid spraying device to filter the liquid as it is extracted into the hose. The filter has a frusto-conical surface member having a hollow cavity, a top surface, and an open base terminating at an annular wall around the perimeter of the base. A plurality of holes surround the surface of the frusto-conical surface member wherein the holes are formed at an angle of about 90.degree. to a plane spanning the base. Removably attached to the annular wall is a circular disk having a planar surface terminating at a ring such that the ring projects about perpendicularly from the planar surface. The circular disk has a coupling projecting about perpendicularly around a center point of the planar surface.

Abstract: The present invention provides a blood filter comprising a housing having a top portion, a base portion and a sidewall portion and a blood inlet. A filter element is disposed within the housing and divides the housing into an inlet chamber in flow communication with the blood inlet and an outlet chamber. The filter element comprises a portion of non-woven filter material and a portion of screen filter material and both the non-woven filter material portion and the screen filter material portion are in contact with the inlet chamber and the outlet chamber. The housing also comprises a blood outlet in flow communication with the outlet chamber.

Abstract: A liquid filtering apparatus includes a hollow cylindrical accommodation member having external screw threads at respective ends. Connecting members are disposed at respective ones of those ends, and each connecting member possesses a passage to enable liquid to flow through the accommodation member. Each connecting member is adapted to be connected to a water pipe and is retained on the accommodation member by a respective lid member which is threaded onto a respective end of the accommodation member. A filter disposed inside of the accommodation member is in the form of a cylindrical perforated net and a panel extending across one end of the net to resist radial crushing of the net when the filter is removed and is being cleaned.

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 support structure for thin screenplates utilized for fine screens in Fibresaving applications for pulp fiber suspensions or the like wherein a support structure having a screen support in minimum screen contact positioned by a support reinforcement and positioning device, assembled to form an integral structure which reduces the stresses and deflections in the thin screenplates occurring in operation.

Abstract: Filter apparatus for filtering contaminants from a fluid, such as machine tool coolant, are disclosed. One filter apparatus includes a filter drum unit having a generally cylindrical open perforated support sheet with a cylindrical screen element mounted thereabout. Circumference varying mechanisms, such as turnbuckles, are connected relative to the support plate to vary the circumference of the support plate and the tautness of the screen element. A disc filter assembly having a mandrel and fluidly attached annular disc filter elements is also described. Each annular disc filter element has an inner structure with concentric ribs forming concentric grooves therebetween which are connected to radially extending grooves. A screen element is supported by the ribs so that the microscreen will not tear while allowing filtering of fluid into the grooves which are in fluid communication with the mandrel.

Abstract: A filter ring for use around the circumferential fuel and timing fluid inlets of a diesel engine fuel injector or similar fluid conducting body. In a first preferred embodiment, the filter ring includes first and second semi-annular, band-shaped filter portions, an integrally formed hinge for pivotally interconnecting the filter portions, and a snap latch mechanism for releasably connecting the opposite ends of the filter portions. In a second preferred embodiment, the filter ring includes a pair of substantially identical snap latch mechanisms for detachably interconnecting the filter portions. The snap latch mechanism is formed from a bead or projection that extends substantially along the entire height of the end of one of the filter portions, and a complimentarily shaped groove on the end of the other filter portion.

Abstract: Undesired contact with dental debris is minimized by a disposable dental trap which is provided with a removable top cover and a pivotable handle. The useful capacity of the trap is increased with a corrugated filter which increases the available filter surface area and thereby reduces the frequency of trap replacement.

Abstract: A screen for use with a vibrating screening machine to filter undesired particles from a liquid uses a filter cloth having a substantially rectangular mesh suitable for separating the undesired particles from the liquid bonded in laminar relationship to a back-up having a substantially coarser mesh. The substantially rectangular mesh is formed by a lengthwise array of parallel individual wires woven with a transverse widthwise array of parallel groups of at least three wires. The individual wires are distorted from rectangular proximate the ends of the rectangles by bows in the individual wires at their area of intersection with each of the parallel groups of wires. This configuration provides improved throughput and life characteristics over known screens. A plastic grid of mesh substantially greater than the back-up mesh may be fused to the bonded lamination of the filter cloth and the back-up.

Abstract: A filter ring is provided that is particularly adapted for use around the circumferential fuel and timing fluid inlets of a diesel engine fuel injector. The filter ring includes first and second semi-annular, band-shaped filter portions, an integrally formed hinge means for pivotally interconnecting the filter portions, and a snap latch mechanism for detachably connecting the opposite ends of the filter portions. The snap latch mechanism is formed from a bead that extends substantially along the entire length of one of the filter portion ends, and a complementarily-shaped groove on the end of the other filter portion. The thickness of the bead and groove is less than the thickness of the opposite ends of the band-shaped filter portions so that the inner diameter of the resulting filter ring seats securely around a complementarily-shaped annular recess in the fuel injector.

Abstract: A papermaking screen of the invention is formed of first and second annular supporting members having a plurality of first and second recesses, and space holding members fixed to the first and second annular supporting members to establish a predetermined distance therebetween. In the invention, one or more elongated member groups having a plurality of elongated members are disposed between the first and second annular supporting members. The elongated members are disposed in the recesses and arranged parallel to each other to form a space between two elongated members situated adjacent to each other. Also, one or more intermediate supporting members may be situated between the first and second annular supporting members. The elongated member group may be situated between the first and second annular supporting members, between the intermediate supporting members, and between the intermediate supporting member and the first or second annular supporting member.

Abstract: A composite structure comprises a porous filter medium, a substrate provided with at least one drainage pathway, and a support and drainage medium sandwiched between the porous filter medium and the substrate. The porous filter medium, the support and drainage medium, and the substrate are bonded free of any adhesive.

Abstract: In a device for dissolving water-soluble, powdery polymers which has a pipe with an inlet to introduce the polymer solution containing gel components and an outlet to discharge the polymer solution, the gel content in the polymer solution is reduced without reducing the viscosity of the polymer solution by means of the fact that the pipe is formed of a plurality of pipe sections which are provided with filters and can be connected with one another.

Abstract: In order to create a rotating drum filter with a filter medium that is extremely fine-meshed and nonetheless has a long service life, whereby the filter medium need not be completely replaced given localized damage thereto, it is inventively proposed that the filter medium be formed of a composite element body with at least two metallic layers, namely with an extremely finely porous, outer metal layer or, respectively, stainless steel fabric that is firmly applied onto at least one metallic supporting grid layer or, respectively, onto a stainless steel fabric layer that is coarse-meshed compared thereto.

Abstract: A traveling water and fish screen device is provided for separating debris from channels of flowing of water. The device includes a carriage that is placed in the water flow and a screen mounted in the carriage which utilizes a continuous band of specially constructed rigid grate panels pivotally attached to and separated by support members in the form of cross bars between each panel. Special hinges are used which provide an extremely small gap between each panel and the adjacent cross bars, which gap is maintained as the as the band rotates around upper and lower cylinders in the carriage. Flaps are provided on the outward, upstream edges of the carriage to prevent debris from coming into contact with the cylinders, support chains or sprockets of the device. The rigid grate panels each have a first set of parallel cross members, and a second set of parallel cross members that are perpendicular to the first set.

Abstract: A device for filtering fluids which is cleanable and re-usable is described. The device includes a cylindrical canister, a cylindrical lid and a filter cartridge. The device is adapted to be disposed in a fluid flow circuit, filtering particulate from the fluid circulating therein. The filter cartridge is quickly removed, cleaned and reused. The fluid enters and exits the device from the top end through fluid inlets and an outlet extending through the lid perpendicular to the lids upper planar surface, thereby reducing the amount of space required to mount the device. The fluid inlets include sloping fins that direct fluids in the filtering chamber in a spiraling action, thereby increasing the effectiveness of the filter.

Abstract: A screening screen assembly for a vibratory screening machine including an apertured plate, and a bonded subassembly of an undulating support screen and fine screening screen and finer screening screen bonded to each other by a fused plastic grid and bonded to the apertured plate. A method of fabricating a screening screen assembly for a vibratory screening machine including the steps of providing a support screen, superimposing a plastic grid onto the support screen, superimposing a finer screening screen onto the fine screening screen, applying heat and pressure to the superimposed screens to fuse the plastic grid and thereby form a flat bonded laminate subassembly by causing the fused plastic grid to permeate the fine screen and the finer screen and the support screen, forming the bonded laminate subassembly into an undulating shape, providing an apertured plate, and bonding the undulating bonded subassembly to the apertured plate.

Abstract: To provide a filter for highly viscous fluid permitting a foreign matter in a supporting layer to be easily removed and its final layer to be directly washed, a method for efficiently producing a refined polymer by using said filter and a method for producing moldings by molding said refined polymer.

Abstract: A fuel intake device (20) for a fuel system (10) having a fuel tank (14) for containing a supply of fuel (16) and an internal fuel feed line (18) which is disposed internally of the fuel tank (14) and which extends into a sump region (26) thereof. The fuel intake device (20) is characterized by a filter assembly (40) which envelopes an end portion (18.sub.E) of the internal fuel feed line (18) and which includes a lower fuel filtering portion (42) and an upper fuel bypass portion (44). The lower fuel filtering portion (42) has a plurality of fine apertures (42.sub.O) therein for facilitating a primary flow (P.sub.F) of fuel (16) therethrough and for filtering debris from the supply of fuel (16) in a normal operating mode. The upper fuel bypass portion (44) has a plurality of coarse apertures (44.sub.O) for facilitating a secondary flow (S.sub.F) of fuel therethrough in a bypass operating mode. Furthermore, the filter assembly (40) is situated about the end portion (18.sub.E) such that the inlet orifice (18.

Abstract: A reinforced net apparatus, defined by a recovery net portion and a rear bag portion, the recovery net portion including a lower body panel portion of reinforced heavy duty netting, interconnected to left and right side panels of netting, and a top body panel portion of lightweight netting, together forming a forward debris-receiving opening. The recovery net portion would be interconnected at its rear wall to a bag portion, comprising netting, for receiving the debris collected in the recovery portion, the bag portion closed off at its rearmost end, and including elephant ears for recovering the bag portion when it is filled with debris. There is further included a lead chain member across the forward floor portion of the net and a trash chain to contact the debris and help move it into the net while the net is being pulled along the bottom of the body of water by a vessel.