Abstract: A method of reducing if not eliminating the possibility of tearing or ripping of a mesh screen of a filter during the manufacturing process includes the step of intentionally deforming the mesh screen. With this technique, as the plastic material that forms the frame of the filter begins to expand or change shape, as a result of the heating and squeezing steps involved with the molding process, the deformed mesh screen will be able to accommodate the relative changes in shape without tearing or ripping of the mesh screen. With the invention, numerous shapes and configurations of tools may be used to provide the intentional deformation of the mesh screen during the manufacturing process as well as to provide for control over the amount and degree of mesh screen deformation. Also, the resulting filter will have a mesh screen that has improved retention capabilities which will enhance the performance of the filter.

Abstract: A screen for separating solids and liquids is formed from parallel strips of wedge wire or similar material into a substantially cylindrical two-sided enclosure in a generally C-shaped profile. Unfiltered liquid containing solids contacts the screen surface on both the convex and concave sides of the C-shaped enclosure. The unit may be placed in a vessel adapted to accommodate two such C-shaped devices in concentric relationship. The vessel may function similar to a candle filter, or a more conventional flow may be used.

Abstract: A mixing vessel contains a septum, dividing a first chamber from a second chamber. By relatively moving the septum with respect to the ends of the vessel, and flowing a fluid through the septum, the fluid is treated as it moves from the first chamber to the second chamber. The particular configuration of the septum allows for treatments such as mixing, reacting, heating, and cooling, as well as filtering of the fluid.

Abstract: A liquid/solids waste separator apparatus for use in separating animal waste or waste water into filtered liquid and collected solid particles. It has an elongated housing having a pair of support legs attached to the rear end of the housing for varying the inclination angle of the housing. Positioned downwardly from the top edge of the housing is an elongated mesh screen that extends substantially the length of the housing. A plurality of nozzles are laterally spaced from each other and connected to the top of a spray tube that extends transversely beneath the mesh screen. A separate slide pad supports each of the opposite ends of the spray tube and they travel along their respective tracks formed on the inner surface of the respective right and left side walls of the housing beneath the mesh screen. An electric motor drives a chain passing around a pair of longitudinally spaced sprocket gears in the housing.

Abstract: A collapsible container consists of three parts: a rigid top rim, a flexible center band a rigid base. This combination of sections allows the container to easily collapse to about one-third of its original height. The container is also quite stable when expanded and is self-supporting. In various embodiments of the invention, for example, the upper rim may be expandable, the base may include holes or mesh to serve as a colander or strainer, or the base may be configured as a tube to function as a funnel.

Abstract: A replacement filter for conventional throw-away spin-on oil filter cartridge on an internal combustion engine. The replacement filter uses a porous metallic filter element, preferably a woven stainless steel, pleated filter element, within a housing physically simulating the conventional throw-away spin-on oil filter cartridge. The housing is disassembleable, typically by unscrewing the top cap of the housing, for removal, cleaning and reuse of the filter element. This avoids the problems of cost and availability of replacement filters and of disposal of used filters. Various embodiments are disclosed.

Abstract: A filtration system for metalworking fluids has panel filter elements arranged in cells in which the filter frames and panels are approximately parallel to one another. The filter frames are disposed such that the filter surfaces are oriented at an acute angle with respect to the longitudinal axis of the drag-out tank within which they are installed. The filter elements are constructed by affixing a microscreen filter to a wire mesh support structure. The wire mesh structure provides as much support as the perforated plates of the prior art, while featuring significant gains in effective filter area when compared with perforated plate constructions.

Abstract: A sludge filter is comprised of a mesh filter media secured to a support net. The support net includes a front surface adjacent the filter media and a rear surface opposite the filter media, the rear surface having a plurality of outwardly extending nodes to define flow channels for horizontal and vertical fluid flow intermediate the net and a container surface. The sludge filter is attached directly to the walls or floor of a container. In a preferred embodiment a border of the sludge filter comprises one part of a two-part fastener system with a second part of the two-part fastener system attached to a container along the perimeter of the filter coverage area, so that the filter medium may be removably attached to the container.

Abstract: A process for ultrafiltration using a spiral wound membrane filter is disclosed where the pressure in the space between the filter element and the pressure vessel is higher than or equal to the pressure inside the filter element. Using these conditions the static force created by the pressure provides a high friction between different sheets in the spiral wound filter element, which efficient prevents unwinding or telescoping of the filter element. Using this configuration it is possible to perform the ultrafiltration using a higher differential pressure across the filter element than would otherwise have been possible which leads to a higher efficiency and a low energy consumption. Further an anti telescoping device (ATD) and a spiral wound filter element, which are particular suited for the disclosed process, are described.

Abstract: The present invention relates to filters used to remove debris from water being sucked into a piping system. It has particular application use in nuclear power plants, which, after a loss of coolant accident, must pump cooling water back into the reactor core from a collection sump. This water may contain various types of debris that must be removed before the water is sent back into the reactor cooling system. There are restrictions on the allowable pressure drop across the strainer and the space available for installing this equipment. The finned strainer of the present invention addresses these issues while maximizing the quantity of debris filtered from the water.

Abstract: A rotary drum filter has a plurality of longitudinally extending division grids mounted about the outer circumference of a drum. A plurality of corrugated sheets are provided, with the leading and trailing edges of each sheet mounted to circumferentially adjacent pairs of division grids to define filtrate compartments. An equivalent number of perforated filter plates are also provided. Each filter plate is attached to the top of a corrugated sheet and has a leading edge and a trailing edge that are set back from the leading edge and trailing edge of the corrugated sheet. A seal clip is positioned near the leading edge of each corrugated sheet. A seal member or seal members is/are held in place by the seal clip and is/are positioned at the face of the leading edge of each corrugated sheet or beneath and near the face or each corrugated sheet.

Abstract: A filter cloth whose underside comprises substantially parallel, additional yarns 8 that are thicker than the rest of the yarns of the cloth, substantially parallel channels 9 being formed between the yarns, wherein filtered liquid passed through the cloth is allowed to flow in the direction of the surface of a filtering element 10 between the filtering portion of the cloth and the surface of the element. The invention further relates to a filtering module manufactured from the filter cloth of the invention.

Abstract: Converting machines give rise to polluted air which must be removed with the aid of fans and filters. The invention aims at removal of the polluted air in such a way that the servicing interval is greatly extended by the use of a filter unit having a number of part-filters arranged one after the other and formed of pleated fiber mats, the various mats having different filtering properties.

Abstract: A strainer is provided to facilitate the washing of an item in a conventional sink. The strainer includes a flexible sheet having a plurality of apertures extending therethrough. Handles project from the outer periphery of the flexible sheet to move the flexible sheet between a first position wherein the sheet is generally planer and a second position wherein the sheet forms a bag. A plurality of spacers extends from and are spaced along a first face of the sheet to space the sheet from the surface of the sink.

Abstract: A system for removing particles from a slurry tank includes a filtering device and a controller. The filtering device collects and removes particles deposited within the slurry tank and the controller controls the placement and movement of the filtering device with respect to the slurry tank.

Abstract: A filter medium includes at least a first and a second layer. Both first and second layers have a layer volume VLq and a layer filtering surface SLq, where SLq is the accumulation of all mantle surfaces of the fibers present in this layer q. The first layer has a SL1/VL1-ratio of less than 32500 m2/m3, and the second layer has a SL2/VL2-ratio being more than 1.1×SL1/VL1.

Abstract: A composite filter material comprising a filter layer and a support layer bonded together. The filter layer is formed of a flexible, liquid-permeable non-woven fabric having a plurality of openings sized to permit liquids and silt particles to pass through the filter layer while preventing sand particles from passing through the filter layer. The support layer is formed of a flexible, liquid-permeable material having a grab tensile strength greater than that of the filter layer, the support layer having a plurality of openings such that the support material is at least as permeable to liquids as the filter fabric. In another embodiment, the composite filter material further comprises a drainage panel bonded to at least one of the filter layer or the support layer. The drainage panel has a laterally-extensive backing grid and a plurality of spaced-apart support members projecting from the backing grid whereby fluid may flow through the backing grid and between the support members.

Abstract: A fluid strainer device is disclosed. The device includes a housing which defines an open chamber, the chamber having both at least one fluid input port and at least one fluid outlet port. A plurality of spaced strainer baskets are disposed within the chamber. Each basket has a pair of spaced perforated side panels, a perforated rear panel, a perforated top panel and an open front portion in fluid communication with the chamber fluid input port. Finally, each strainer basket is aligned within the chamber for fluid flow from the chamber input port into the basket's open front portion and out through the perforations thereof to filter debris from the fluid while preventing substantial fluid pressure drop between the input and outlet ports substantially independent of debris buildup within the baskets.

Abstract: An in-line storm water drain system and a filter basket for a storm water drain system are provided in which the storm water drain system has a housing having an inlet and outlet thereinto and interior walls forming a plurality of chambers therein. The filter basket has a rigid frame and a plurality of screened sides and is attached to the interior walls. The filter basket has a pair of top screen filter doors and a pair of bottom screen filter doors to allow entry into the filter basket and on through to the bottom of the filter basket for cleaning the chambers. An inlet feed chute is attached to the filter basket open end and also has a screen bottom door and directs water from the housing inlet to and through the filter basket while collecting debris in the basket.

Abstract: A plate-shaped filter element made from several wire cloth layers and having at least one layer in the form of a filter cloth is designed to allow particles of a certain size can be filtered out from a filterable material, whereby, in particular, particles can be filtered out from a fluid, an emulsion or the like. The filter element according to the invention is configured such that at least the layer forming the filter cloth is provided with spaced-apart alternating crossovers at an angle to the warp and weft threads. The alternating crossovers extend in a zigzag whereby each straight section extends across a same number of warp threads. The alternating crossovers extend from the edges which are parallel to and spaced from the warp wires. The filter element according to the invention is particularly suitable for filtering of emulsions.

Abstract: The present invention provides for a design and method of manufacture for a mesh-type screen to be used in subsurface well completions to prevent the production of sand.

Abstract: An oil supply passage of a cylinder head increases design freedom of cylinder heads. The oil filter variously sets the oil supplying position through which oil enters into an oil filter. This improves fuel consumption by simplifying the oil supply passage of the cylinder head, reduces power loss of an oil pump, and decreases the size and weight of the cylinder head.

Abstract: A freestanding portable liquid filtration device (18) having an upper housing (24), a lower housing (32) and a base (36) which are secured together with an interference fit, with an enclosed lower portion of the upper housing (24) fitting within an open top of the lower housing (32) and an enclosed bottom of the lower housing (32) fitting within an upwardly facing opening of the base (36). A filtration element (26) having a first portion disposed with the upper housing (24) and a second portion from which fluid is discharged disposed within the lower housing (32), wherein liquid flows from the upper housing (24) through the filtration element (26) and into the lower housing (32). The upper and lower housings (24, 32) being formed of transparent materials, and the lower housing (32) including a light source (38) for illuminating at least a portion of the lower housing (32).

Abstract: A screen mounting basket for a vibratory separator for separating components of material introduced into the basket, the vibratory separator including a collection receptacle beneath the basket, the basket including two opposed spaced-apart side walls having first ends and second ends, the first ends spaced-apart by spaced-apart end walls connected to each of the side walls, a basket bottom between the two spaced-apart side walls, at least one screen assembly positioned vertically in the basket for interceptions material introduced into the basket and for screening said material, and the at least one screen assembly extending from one side wall of the basket to the other.

Abstract: A filter device, in particular, for high-pressure applications in a molten polymer filtration, has a screw-in piece (10), provided with a first threaded section (12) for fixing the filter device, and a second threaded section (14) for fixing a filter medium (16), in particular, in the form of a metal wool and with a perforated support tube (18) for the metal wool. The other free end of the filter device is provided with a volume displacer (24). The metal wool is surrounded by a support grid (20) and fixed by two fixing pieces (28, 30), held at a separation from each other by the support grid (20). One fixing piece (28) is fixed to the second threaded section (14) of the screw-in piece (10). The other fixing piece forms a handle (30) for the fixing formed.

Abstract: The present invention provides a gutter screen attachment and a ridged filter assembly for minimizing water film runoff and debris collection adjacent a screened gutter. The screen attachment comprises a superior breaker edge, an inferior breaker edge, and a screen-receiving region. The superior breaker edge extends upwardly opposite the inferior breaker edge and is designed to break the water tension of a water film formed upon the gutter screen. The ridged filter assembly comprises a filter support grid, a filter screen and a ridge-forming member sandwiched between the filter support grid and the filter screen. The filter screen is form fit to the underlying structures and the ridge-forming member thus forms a water tension straining ridge upon the filter screen. The superior breaker edge and the filter screen ridge function to allow water to permeate through the gutter screen.

Abstract: A vibratory apparatus for separating a liquid from a liquid-laden solid material. The apparatus includes an inclined trough having a base with a first end and a second elevated with respect to the first end. A deck is attached to the trough base, the deck defining support points positioned above the base spaced from one another by a distance sufficient to support the solid material above the deck, and passages located between the support points to allow liquid to flow to the deck. A vibratory drive is attached to the trough and oriented impart a conveying motion toward the trough second end. Solid material deposited onto the deck is advanced toward the second end by the conveying motion while the liquid flows along the trough base toward the first end under gravity.

Abstract: A containerless tissue sample collection trap featuring, in the preferred embodiment, a flexible filter and an applicator having a shaft terminating in a distal end with a channel therein receiving a portion of the flexible filter, the combination of the applicator and the flexible filter receivable in a suction tube and configured such that when the applicator is removed, the flexible filter forms a removable elongated tissue trap in the suction tube. Also disclosed is a method of trapping tissue wholly within a suction tube thereby eliminating the need for a specimen trap container and a method of making a containerless tissue specimen trap.

Abstract: A drain water filter assembly for filtering debris laden liquids. The filter assembly has an apertured filter holder constructed and arranged to be placed into a basin, tub or sink. A removable and disposable filter is provided for placement within and securement to the filter holder structure. The filter holder has an elevated bottom portion which permits debris to be filtered and the filtered drain water to be dispensed through the apertures in the elevated portions of the filter holder bottom.

Abstract: A sludge filter is comprised of a mesh filter media secured to a support net. The support net includes a front surface adjacent the filter media and a rear surface opposite the filter media, the rear surface having a plurality of outwardly extending nodes to define flow channels for horizontal and vertical fluid flow intermediate the net and a container surface. The sludge filter is attached directly to the walls or floor of a container. In a preferred embodiment a border of the sludge filter comprises one part of a two-part fastener system with a second part of the two-part fastener system attached to a container along the perimeter of the filter coverage area, so that the filter medium may be removably attached to the container.

Abstract: A filter assembly is provided that has a filtering screen and a skeletal structure, the skeletal structure being attached to the filtering screen. At least one of the filtering screen and the skeletal structure form a plurality of downward extending channels.

Abstract: A flat or cylindrical screen includes rods and rod-bearing supporting elements. The rods have protrusions in the side walls which are received into inversely shaped recesses in a supporting element. The screen is manufactured by bending the supporting elements open elastically and inserting the rods, whereupon the supporting elements spring back, encircle the rods positively and form a screen mat.

Abstract: A sieve separator and a method of slurry separation that uses two or more levels of filtration screens. In some embodiments, the filtration screens on different levels may be used to separate solids of various sizes at each level.

Abstract: A method of separating a liquid from a liquid-laden solid material includes providing a trough having a deck defining a support surface with passages extending through the support surface. The liquid-laden solid material is deposited onto the support surface so that the liquid-laden solid material is supported by the support surface. A vibratory force is applied to the deck to separate a substantial portion of the liquid from the liquid-laden solid material. The liquid separated from the liquid-laden solid material is directed under gravity force through the passages extending through the support surface. The solid material is conveyed along the support surface by the vibratory force to a solids discharge point.

Abstract: The invention relates to a filter cloth for a filter press and to a method for producing said filter cloth. The inventive filter cloth has a filtration section through which the filtrate reaches a filter element of the filter press, and an edging section which rests against the edge of the filter element. The filtration area is provided with a cloth that differs from that of the edging section. The filtration area is woven from monofil yarns while multifil yarns are woven into the edging section.

Abstract: A filter ring includes a first filter member including a first end portion and a second filter member including a second end portion. The filter ring also includes at least one snap latch mechanism for detachably engaging the first end portion with the second end portion such that the first and second filter members cooperate to define a generally annular shape having a central opening. The first end portion includes at least one key configured to be positioned within at least one keyway defined by the second end portion for inhibiting disengagement of the snap latch mechanism when the snap latch mechanism is detachably engaging the first end portion with the second end portion.

Abstract: A diagonally joined cylindrical fabric in the form of a cylindrical endless fabric is obtained by shifting ends of facing wefts of a non-endless fabric leftward or rightward and joining together the ends of the wefts to thereby form a joining portion inclined relative to an axis of a cylinder. The cylindrical fabric comprises a weave pattern in which warp passes over continuous two or more wefts, then passes under a less number of wefts, the joining portion at ends of the fabric formed into an endless cylindrical shape is inclined relative to the axis at 25° to 5°. The surface of the cylindrical fabric is formed with crimps that are longer in a face length direction than in a circumferential direction.

Abstract: A drain filter device includes a body formed from wire mesh having a plurality of side edge portions integral with each other and forming a substantially square shape. The body further has substantially planar top and bottom surfaces and includes a plurality of elongated support rods having opposed end portions extending along the plurality of side edge portions respectively. The device further includes a top section having a substantially cylindrical shape and connected to the body. The top section is adaptable to be positioned substantially centrally about drain and for filtering out particulate materials suspended in water entering the drain. Advantageously, the top section traps and maintains particulate materials about a perimeter of a drain and not directly above same.

Abstract: A liquid/solid separator system mounted on a mobile cart and connected to a process tank for reducing the rate at which fluids are consumed in manufacturing processes. The system may include automation and also may include a shear stepped screen including tilted wire wedge wires arranged at varying cant angles. The system may include a fine screen basket received in a settling box.

Abstract: A braided strainer for a draw line, and method of forming same. The strainer comprises a frame in the form of a pair of spaced planar plates, one being a solid end plate and the other having a control aperture. A plurality of spaced, parallel rods of similar length are positioned near the peripheries of the plates and secured and extending between the plates. A plurality of cylindrical walls of braided strands of strainer medium, are provided, the braided cylindrical walls having similarly spaced rod-receiving holes extending longitudinally in spaced fashion through the strands of strainer medium. These walls are contiguously stacked on the plates to extend between them. The plate having the central aperture permits flow of fluid drawn through the cylindrical walls during operation of the strainer. That plate has associated with it a connector to releasably secure the strainer to a mating connector on a free end of the draw line.

Abstract: A liquid/solids waste separator apparatus for use in separating animal waste or waste water into filtered liquid and collected solid waste particles. It has an elongated housing having a pair of support legs attached adjacent to the rear end of the housing for varying the inclination angle of the housing. Positioned downward from the top edge of the housing is an elongated mesh screen that extends substantially the length of the housing. A plurality of nozzles are laterally spaced from each other and connected to the top of a tube that extends transversely beneath the mesh screen. A carriage supports the opposite ends of the tube and it has wheels that ride along tracks supported on opposite lateral sides of the mesh screen. An electric motor drives a chain passing around a pair of sprocket gears in the housing. A drive peg extends laterally from the chain and it is captured by a guide member whose bottom end is connected to the carriage.

Abstract: A method is provided for fixedly joining a cloth, a cloth-like fabric or a synthetic mesh to a filter plate using a flanged cloth connector ring. The flanged cloth connector ring is attached to the filter cloth around the feed port of the cloth and inserted into a receiving channel in the filter plate. A locking ring or a distribution ring may be inserted into the channel adjacent to the connector ring to retain the connector ring and attached filter cloth in place. Filter cloths may be individually and independently attached to each side of a filter plate using a cloth connector ring.

Abstract: A method for removing matter from fluid contained within a tank. The method includes inserting a filter within the fluid, and circulating the fluid within the tank such that a portion of the fluid is passed through the filter such that matter contained within the fluid is retained by the filter.

Abstract: An industrial, e.g. power plant cooling, water extraction framed cartridge filter system is disclosed with a holed fabric type medium to filter debris from the power plant cooling water. The fabric type filter medium is comprised a one or more strength meshes of nylon or another strong fiber and an inner polypropylene or polyester medium with small holes. The size of the frame and the number and arrangement of the holes are arranged to supply a volume of filtered water consistent with the needs of the application at the typical pressures found therein. For a power plant, a system of many cartridges may be used to provide the total cooling/replacement water needs. Compressed air is introduced into the bottom interior of the cartridges and released via a valve at the top. The compressed air mechanically disturbs the filter medium to knock off any debris that may have attached to the filter medium surface and air escaping via the small holed in the filter may attach to and float small pieces of debris away.

Abstract: A screen assembly in which the screen (10) is in the form of an inverted semi-circular trough the foul flow (A) to be screened approaching the underside of the screen so that debris which is filtered falls away from the screen by gravity so minimising blockages and “blinding” of the screen. A helical sweeper (20) is provided to minimise adherence to the screen.

Abstract: An improved gutter shield device includes a first connecting plane of roll formed metal, a second filtering plane of roll formed metal and metallic or polymer cloth, and a third connecting plane of roll formed metal combined into an integral unit. An elongated strip of roll formed metal includes a rear vertical plane adapted to seat beneath shingles of a roof structure. The rear vertical plane is crimped by roll forming onto the second and rear longitudinal edge of a forward extending plane that combines a fine filtering membrane with an underlying skeletal support of expanded metal as an integral unit. The expanded metal and filtering membrane so joined contain two or more v-shaped downward extending longitudinal channels within the forward extending plane that transverse the length of the forward extending plane parallel to it's first edge.

Abstract: A pulp screen cylinder that includes screen media releasably engaged with a frame at spaced locations opposing movement of the media away from the frame during screening. A preferred frame includes a plurality of spaced engaging structures that releasably engage screen media. A preferred frame includes an arrangement of flow windows that are triangular or rhomboid. A preferred method includes producing a frame cylinder by centrifugal casting and machining flow windows using a jet cutting process. A preferred screen media has a plurality of spaced apart engaging structures that each releasably engages the frame at spaced apart locations. A preferred screen media is of wedgewire construction having engaging structure carried by a plurality of spaced wire retaining clips. A preferred clip has vee-shaped rounded slots and an arm thicker than an end wall. A preferred engaging structure includes a projection that has a lip or hook for releasable interlocking engagement.

Abstract: A filter (10) for use in a water heating vessel, such as an electric kettle, to filter sedimentary material in the water includes a scale collector (25), for example in the form of a compacted mesh block, carried on the filter. The block can be supported by a carrier member (27) permanently or detachably mounted on the filter frame, preferably towards an end of the filter closest to the bottom of the vessel.

Abstract: A layered filtering structure (10) comprises at least a first layer (12) and a second layer (13). Each layer comprises a web of metal fibers which has been sintered. The two layers (12, 13) are in contact with each other. The first layer, most close to the filter inlet side has a porosity below 55%, and the second layer, closer to the filter outlet side has a porosity which is at least 20% greater than the porosity of the first layer. The first layer is compacted in a separate manufacturing step. The layered filtering structure combines the advantage of a small filter rating with a low pressure drop.

Abstract: A method of plugging an area of damaged mesh in a sifting screen. The method is applicable to screens in which woven wire mesh is stretched, tensioned and secured over a supporting frame containing a plurality of windows and in which local damage to the mesh is in an area of the mesh which overlies one of the windows. The method has the steps of inserting into the window a device which is a close fit therein, and securing the device in the window so as to completely cover the area of damaged mesh. The device may be a former having stretched thereacross and secured thereto mesh similar to that stretched across the window in question, or simply a plate or block. The device may be secured in place by a force or interference fit, mechanical means, or adhesive, or the device may be resiliently deformable to allow it to be pushed past a projection in the window, so as to snap fit the device in place.