Abstract: A backwash valve controls or switch the direction of water flowing through a filter so as to filter foreign materials from water and/or automatically discharge foreigh materials previously filtered by the filter. The backwash valve comprises a body hollow in its inner space and a direction control unit movably mounted inside the body in such a manner as to be in close contact with the inner wall of the body. The backwash valve control or switch the flow of water which is automatically of manually introduced/discharged. Also, a backwash filtering device using the backwash valve can easily discharge foreign materials accumulated in the filter without replacing the filter with new one through operation of the backwash valve.

Abstract: A filter cartridge (20) for removing particulates from a particulate laden fluid stream moving one direction through the filter cartridge. The filter cartridge (20) is periodically subject to cleaning fluid moving in an opposite direction to the fluid stream. The filter cartridge (20) comprises filtration media (24) formed into a tubular configuration and having a plurality of circumferentially spaced apart pleats (26). A retention device (82) to limit radial movement of the filtration media (24) when subjected to the periodical cleaning fluid and to maintain the pleats (26) in the filtration media circumferentially spaced apart. A method of making a filter cartridge (20) for removing particulates from a fluid stream moving one direction through the filter cartridge and that is periodically subject to cleaning fluid moving in an opposite direction to the fluid stream.

Abstract: The-FALL THRU SAND TRAP employs a screen, open top and bottom to allow sand and debris to fall away from the filter. A transparent holding pipe, sight glass, holding pipe, and a method to back flush.

Abstract: A screen unit for removing solid particles from a viscous mass, for example molten plastic. The screen unit includes a housing provided with a supply channel and a discharge channel for the viscous mass, a screen element in the housing between the supply channel and discharge channel, a backflush channel for discharging during backflushing solid particles screened by the screen element and connected to an outflow channel by a shutoff valve, and a pressure element which can be operated to flush back the viscous mass through the screen element at a pressure higher than the pressure in the supply channel. The shutter element is placed along the screen element, and the shutter element is caused to move with respect to the screen element such that during the screening phase the screen element is gradually more exposed for screening and during the backflushing phase the screen element is gradually less exposed to the backflushing action.

Abstract: A system for limiting the size of particulate matter entering a septic tank pump contains a strainer that has a straining screen through which the pump draws liquid from the septic tank. A nozzle receives some of the effluent being pumped by the pump and is aimed toward the screen for directing effluent toward the screen to dislodge particulate matter from an area of the screen while the pump draws liquid through the screen. The screen and nozzle are arranged for relative movement so that the area of the screen being acted on by the effluent from the nozzle changes as the pump operates. Various embodiments are disclosed.

Abstract: A drilling water filter (1) with a self-cleaning system including a filter container (2), a cover (3) and a filter element (6) that can be inserted in the flow arm between an inlet (4) and an outlet (5) for separation of solid material from the fluid. The cover (3) has a displaceable carrying handle (7) for transporting the drilling water filter. The carrying handle (7) is connected with at least one self-cleaning means, in a controlled manner.

Abstract: A self-cleaning, back-washable filter apparatus and method for use with a pumping apparatus which is lowered into a well casing. The filter apparatus includes a filter basket having a manifold with several tubes extending therefrom. A filter sock encases at least a portion of the filter basket to block sand or other solid particles from entry into the pump intake. Pressurized gas or fluid is directed to the manifold and then through perforations or jets distributed along the length of the tubes. Bursts of the pressurized gas are directed from the perforations or jets to the interior of the filter apparatus and then sprayed from the perforations or jets in an outwardly direction against interior surfaces of the filter sock. Air or fluid bursts from the perforations impinge upon the interior surfaces of the filter sock and dislodge or expel entrapped particulate material.

Abstract: The present invention relates to stationary cloth media filtration systems and devices, as well as processes and devices for uniform flow distribution and improved cloth media filter backwashing.

Abstract: A self cleaning filter includes a body (15), inlet (1), outlet (14), flush inlet (12) and waste outlet (2). Elements (7) provide filtration while compressed but are cleaned decompressed. Feed from inlet port (3), impacts and swirls from an impeller (5) on moveable plunger (6) for preliminary centrifugal separation. During filtration plunger (6) is positioned to open the inlet port (3), the filtrate port (11) and compress filtration elements (7). The swirling feed permeates the filtration elements (7) and passes filtrate port (11), filtrate valve (21), filtrate plenum (16), and exits the filtrate outlet (14). Plunger (6) is moved and cleaning is provided by supplication of pressurized cleaning media to the back flush receiver plenum (13) via the back flush media inlet (12). This pressure motivates plunger(6) to close inlet port (3), filtrate port (14) and decompress filtration elements (7).

Abstract: A filter is provided within a case. A to-be-filtered fluid flowing into the case is passed through a peripheral wall of the filter. Thereby, foreign matter included in the to-be-filtered fluid is captured by filtration. A cleaning member is provided within the case. The cleaning member pressurizes the to-be-filtered fluid by a pressure fluid, and causes the pressurized to-be-filtered fluid to pass through the peripheral wall of the filter in a direction reverse to a direction in which the to-be-filtered fluid is filtered. When foreign matter captured in the filter is to be removed and cleaned, the to-be-filtered fluid remaining in the case is pressurized by the cleaning member and caused to flow in a direction reverse to a direction in which the to-be-filtered fluid is filtered. Thereby, foreign matter captured by the peripheral wall of the filter is removed.

Abstract: A filter unit for filtering particulates and other foreign matter from a water supply, comprising a filtering chamber. At least a portion of an exterior of the filtering chamber being provided with filtering chamber in use. The mesh being sized to filter particulates and other foreign matter from the water. The filter unit further comprising an outlet through which filtered water exits the filter unit, and a rotatable member located within the filtering chamber, the rotatable member having at least one outlet spaced from an internal face of a mesh. The axis of rotation of the rotatable member being such that the at least one outlet traverses at least a substantial portion of the internal face of a mesh.

Abstract: The filter has a framework with an inlet end, a solids outlet end and an outlet for a separated product between the ends. A fabric filter extends in the framework from end to end and is supported by movable rings, resilient members and dampers enabling axial extension and contraction of the filter. The resilient members, rings and dampers form a unit removable from the framework. A propeller turbine extends through the filter and is supported at opposite ends, and a drive is coupled with the turbine at the one end of the framework. A quick assembly/disassembly mechanism with a rail extends along the framework and is engageable with its cap for removing same and affording access to the unit enabling withdrawal of the unit from said framework and reinsertion of a filter unit composed of a filter and respective movable rings, resilient members and dampers.

Abstract: A filtering system (10) is provided for filtering working fluid from a machine (12) and includes a cleanable filter (16) and a centrifuge (82) where filter capacity is too low for a permanent filter yet flow rate is too high for a centrifuge. The system transfers the contaminant storage function from the cleanable filter to the centrifuge. A simple effective centrifuge is provided.

Abstract: A method and device for dewatering most liquid/solid solutions and slurries is described. A dewatering device having a dewatering pump in fluid communication with a filter rack with vertically arrayed filter elements that is carried by a container. To begin the dewatering process, the filter rack is lowered to the bottom of the container and the liquid/solid slurry is introduced. Next, the dewatering pump draws the liquid from the slurry into the filter rack and then to the pump. When dewatering efficiency decreases, the dewatering operation is momentarily stopped and the filter elements of the filter rack are backpulsed with air and raised to dislodge the filter cakes that have formed. The filter rack is then relowered and the dewatering operation continues. These steps of dewatering, backpulsing, raising the filter rack, and lowering filter rack are continued until the container is full of dewatered solids.

Abstract: The filter device contains a stack of filter rings (2), preferably consisting of plastic. Each filter ring (2) contains a number of cams (3) which are distributed evenly over the face, and diametrically opposed recesses. When the cams (3) and the recesses of adjacent filter rings (2) lie flush on top each other, a gap (7) is formed between them. The gap openings of the filter element (8), which consists of several filter rings (2) layered on top of each other, can be cleaned efficiently by means of a back-flow device comprising nozzle bodies (70). The characteristics of the filter can be altered by selecting a filter gap with different filter rings and different filter stack heights.

Abstract: A fine filter assembly for a dishwasher includes a filter body having a soil accumulation trough. The soil accumulation trough defines a substantially helical flow path between a fine filter inlet and an outlet. A natural flow path is therefore provided to efficiently clean fine the filter assembly with downwardly directed fluid jets generated by a lower spray arm assembly. Soil is directed to a fine filter drain tube with relative ease, thereby facilitating use of more efficient use of a drain pump inlet as a soil collection chamber during wash cycles.

Abstract: A fluid filtering system for filtering dirt and other debris from fluids being conveyed in a pipeline for snow making apparatus and other devices. An upright pipe segment is connected to a horizontal pipe segment through a pipe elbow or angle for conveying fluid such as water and/or air under pressure from the horizontal pipe segment through the pipe angle and upwardly through the upright pipe segment. A filter is provided in the upright pipe segment adjacent its lower end and an external drain is disposed in the pipe angle directly under the filter to automatically flush and clean the filter when the drain is opened.

Abstract: A filtration apparatus includes a laundry waste sump, a primary 50 micron static screen filter, a 9,000 gallon equalization tank, at least one secondary media/carbon filter, a sludge holding tank with a pump to return excess water to the equalization tank, a backwash pump, an air blower, and a clear well tank water source for backwash. An exemplary embodiment of the invention also includes a surge tank between the primary and secondary filters and a surge tank between the secondary filter and the clear well tank.

Abstract: A self-cleaning assembly comprising an enclosed casing 1 with a movable piston 31 and filters 32,33 therein. The preferred assembly has a casing 1 with a dirty water inlet 5, a first outlet 6 for clean filtered water and a second outlet 7 for the removal of sludge from the casing. The filter assembly is constructed and arranged to provide, in its normal operating mode, a liquid flow path through the filter 32,33 in a first direction between the dirty water inlet 5 and the clean water outlet 6 and, in a cleaning mode, to provide a liquid flow path in a second direction between the dirty water inlet 5 and the sludge outlet 7. In the cleaning mode, the movable member 31 compresses the filters 32,33 during the liquid flow in the second direction and contaminant is released therefrom for removal from the filter assembly via the second outlet 7. In an alternative embodiment, the sludge outlet 7 is omitted and sludge is removed from the casing via the outlet 6.

Abstract: A device for reducing the liquid content of a liquid and solid slurry. In the device, a dual-walled vertical tube sits atop a perforated endplate. The wall of the tube is non-porous at the upper end and porous at the bottom end. A liquid and solid slurry enters at the top of the tube filling the tube. Some of the liquid in the slurry exits the tube by radial outflow through the porous segment of the tube wall. The reduced liquid slurry exits through the perforated endplate.

Abstract: A self-cleaning water filter, coupled to a water flow having particulates therein, that includes a pair of canisters, each having a cylindrical wedge wire water filter screen. An elongated brush running the length of the screen is disposed between two confining walls also running the length of the screen to form a chamber. A elongated partition, including two sets of apertures, is used, along with the elongated brush, to divide the chamber into two particulate dislodge chambers and a drain subchamber. A drain is in fluid communication with the drain subchamber. During cleaning, the drain is opened and the screen is rotated against the brush for liberating the particulate contaminants and a limited amount of the water flow into the two dislodge subchambers. The particulate contaminants and the limited amount of water then pass through the apertures at a high velocity and into the drain a subchamber which exits through the drain.

Abstract: An apparatus for enhanced cleaning of a filter unit, said apparatus being comprised of a closed reaction chamber body (25) adapted to receive and store in a reaction chamber (35) back-flush fluid, preferably filtrate, further adapted with access porting to chemically treat (30) and monitor (34) and to thermally (32) treat and monitor (33) said stored fluid and further adapted to receive (28) and vent (29) compressed gas into the gravitationally oriented upper section of the reaction chamber (35). Said reaction chamber (35) being further provided therein with conveyance tubing (8) so configured to facilitate hydraulic communication between the gravitationally oriented lower section of the reaction chamber (35) and a back-flush fluid inlet port of the filter unit being served. The conveyance tubes (8) and the reaction chamber (35) being co-oriented in a substantially vertical direction.

Abstract: A self-cleaning water filter, coupled to a water flow having particulates therein, that includes a pair of canisters, each having a cylindrical wedge wire water filter screen. An elongated brush running the length of the screen is disposed between two confining walls also running the length of the screen to form a chamber. A elongated partition, including two sets of apertures, is used, along with the elongated brush, to divide the chamber into two particulate dislodge chambers and a drain subchamber. A drain is in fluid communication with the drain subchamber. During cleaning, the drain is opened and the screen is rotated against the brush for liberating the particulate contaminants and a limited amount of the water flow into the two dislodge subchambers. The particulate contaminants and the limited amount of water then pass through the apertures at a high velocity and into the drain subchamber which exits through the drain.

Abstract: The invention is in a method of analyzing the water of an industrial water system wherein an analytical device is used to measure some parameter capable of being measured in the water of said industrial water system, the improvement involving using a water movement device that is capable of moving a sample of water into the sample chamber of said analytical device and is also capable of moving the same sample of water back out of said analytical device in a manner such that the filters present in the piping of said industrial water system are back flushed out every time the water movement device moves a sample of water in and out of said analytical device. Optionally an air sparge is used to enhance the cleaning of the filters.

Abstract: A filter element with a cylindrical structure having a filter medium 11 mounted to a support element 10. The filter medium 11 is fastened to the support element 10 in such a way that no relative movement between these components is possible. This creates a heavy-duty assembly between filter medium and support element and increases filter life. It is thus possible for the filter to withstand a pulsating load, e.g., caused by backwashing of the filter medium, without risk of destroying the sensitive filter medium due to vibrations or any relative movement between the support element and the filter medium. This assembly may be produced by mounting the filter medium under tension to the support element and by fixing it with a reinforcement strip 12. The use of valves with switching times of less than 0.4 seconds makes it possible to achieve extremely short backwash pulses to clean the filter without risk of failure of the filter medium.

Abstract: The invention relates to a method and apparatus for filtering a liquid. The filtering is conducted using one or several filter elements in the filter housing, the operation being based on the alternation of filtering stages and air flushing stages. According to the invention, upon transferring from the flushing stage to the filtering stage, the filter housing is filled with liquid so that the liquid pushes the flushing air in the housing from the upper end of the housing into a separate air container so that air is compressed to a higher pressure in the container. During the filtering stage, air remains in the container, and after the filtering stage, air compressed in the container is allowed to push liquid out of the filter housing with its pressure. Further, the connection between the air container and the filter housing can be arranged so that air compressed in the container participates in the backflushing of the filter elements.

Abstract: A back flushable filter comprising a body (15), a raw feed inlet (1), a filtrate product outlet (14), a back flush media inlet (12) and a back flush waste outlet (2). A a filtration element (7) is used which provides filtration when in a compressed, sealed state and can be back flushed clean when released in a loosened state. During filtration, raw feed water passes through an inlet port (3), impacts upon and exits radially with swirl from a centrifugal impact impeller (5) mounted in conjunction with the upstream side of the filter element sealing plunger (6). The swirling raw feed water passes adjacent to and then into and through the filtration element (7). The filtrate then exits the internal filtrate sector of the filtration element (7) via the filtrate port (11) past the open filtrate valve (21), into the filtrate plenum (16) and is discharged via the filtrate outlet (14).

Abstract: A filter device has a filter housing, which is intended to contain a liquid to be filtered and in which at least one filter rod is arranged. The filter rod is composed of annular washers, which are arranged in a stack on a core formed with openings and which are so closely packed that particles in the liquid adhere to the periphery of the washers when the liquid is caused, from the outside, to pass between the washers into the core for filtration. The filter device has a gas supply member, which is intended to inject a gas flow into the liquid in the filter housing.

Abstract: A fine filter assembly for a dishwasher includes a filter body, a filter screen coupled to the body; and a pressure relief tube. The pressure relief tube includes a substantially vertical portion having an open top for regulating pressure conditions in the filter body, thereby forming a standpipe that regulates pressure in the filter body. A column of fluid in the relief tube balances the operating pressure in the fine filter assembly. Pressure may be regulated in the fine filter assembly up to a maximum pressure determined by the height of the vertical portion of the tube.

Abstract: A self-cleaning, back-washable filter apparatus and method for use with a pumping apparatus which is lowered into a well casing. The filter apparatus includes a filter basket having a manifold with several tubes extending therefrom. A filter sock encases at least a portion of the filter basket to block sand or other solid particles from entry into the pump intake. Pressurized gas or fluid is directed to the manifold and then through perforations or jets distributed along the length of the tubes. Bursts of the pressurized gas are directed from the perforations or jets to the interior of the filter apparatus and then sprayed from the perforations or jets in an outwardly direction against interior surfaces of the filter sock. Air or fluid bursts from the perforations impinge upon the interior surfaces of the filter sock and dislodge or expel entrapped particulate material.

Abstract: A self-cleaning, back-washable filter apparatus and method for use with a pumping apparatus which is lowered into a well casing. The filter apparatus includes a filter basket having a manifold with several tubes extending therefrom. A filter sock encases at least a portion of the filter basket to block sand or other solid particles from entry into the pump intake. Pressurized gas or fluid is directed to the manifold and then through perforations or jets distributed along the length of the tubes. Bursts of the pressurized gas are directed from the perforations or jets to the interior of the filter apparatus and then sprayed from the perforations or jets in an outwardly direction against interior surfaces of the filter sock. Air or fluid bursts from the perforations impinge upon the interior surfaces of the filter sock and dislodge or expel entrapped particulate material.

Abstract: The invention relates to a filtering apparatus, the operation of which is based on alternating filtering and flushing stages. The apparatus comprises one or several filter elements placed into a filter housing supported by a casing, the filter housing being provided with an inlet assembly for the liquid flow to be filtered, an outlet assembly for the filtered liquid flow, and a channel for flushing the filter elements with air. Further, the filter housing is arranged to be prefilled with liquid before the next filtering stage is initiated after the flushing. According to the invention, a filling channel is directed into the filter housing through the casing, the channel being provided with a valve, which closes the channel at the same time as the filter housing is opened, for example, for changing the filter elements. Closing may be automatic.

Abstract: This invention comprises a method and an apparatus for separating solids from fluids in fluids containing high total suspended solids and where the solids are of a broad particle size including ultra fine particles. A fluid volume is passed through a filter element thereby separating the solids from the liquid. The solids deposited on and in the filter element are cleaned from the filter element by a continuous backwashing process using pressurized filtered fluid in excess of the fluid pressure of the fluid on the intake side of the filter. The rate at which backwashing occurs and the pressure of the pressurized filtered fluid used in backwashing is increased when the pressure differential between the intake and outlet volumes increases.

Abstract: This invention relates to a backflushing filter, particularly for filtering lubricating oil. Filter candles 22 which are open at both ends 24, 34 are disposed around a rotary shaft 1 in the filter housing 11, 12, the interior space of which filter candles can be acted upon in filtration operation by a sludge which flows into the backflushing filter 10. A cleaning device is moved in conjunction by means of the rotary shaft 1, and comprises an upper flushing cock 27 and a lower flushing cock, which communicate with an outflow valve via the rotary shaft 1, for cleaning the filter candles 22′ during a backflushing operation. The upper flushing cock 27 is offset by an angle in the direction of rotation in relation to the lower flushing cock 37.

Abstract: A backflushable filtering apparatus for fuel or luboil filter of a motor includes inlet and outlet flow channels, parallel filtering elements open from their ends, in which infiltration occurs from through their jackets, and washing organs at different ends of the filtering elements, the organs connecting alternately to different ends of the filtering elements to provide discharge channels for the backflushing of elements generated by the pressure of the filtered flow. Each of the filtering elements is divided in two by a solid partition or constriction between its ends so that the connected washing organ generates backflushing only to a part of the element length at a time. The parts of the filtering element are functionally independent, and the one part may be backflushed at the same time as the filtering goes on in the other part.

Abstract: The invention relates to an arrangement for filtering plastic melts. Dirty filter elements (4, 4) can be liberated from collected dirt particles by means of backwashing. The melt (8) used for backwashing is deviated from the main melt flow and can optionally and additionally be impinged upon by conveying elements. Backwash is periodically initiated according to the time and/or the degree of soiling of the filter element to be cleaned. The aim of the invention is to improve the inventive arrangement in such a way that cleaning is optimal according to the degree of soiling of the filter element to be cleaned respectively. A control device (7) is provided which detects the melt volume and/or the flow rate of the backwashing melt during a backwashing procedure.

Abstract: A filter element assembly used to filter liquid-state process stream. The assembly includes first and second tubes. A ring is seated in one of the tubes. One or more filter elements extend from the ring into one of the tubes. The ring has a lip that extends beyond the outside of the tubes. Opposed open ends of the tube abut opposed surfaces of the ring lip. A seal surrounds the open ends of the tube and the ring lip. A clamp surrounds the seal. Liquid that flows between the ends of the tubes and the ring lip forces the seal against the clamp and the outer tubes to prevent the liquid from flowing beyond the seal.

Abstract: A self-cleaning prefilter system generally includes a system inlet 11, a sediment filter 13 having a selectively openable drain port 18, a chemical injector 21, a pressure accumulator 28 having a upper chamber 31 in open fluid communication with the filter outlet 16, and a system outlet 12. A controller 33 in communication with a plurality of valves (V1, V2, V3) initiates a backwashing mode such that upon opening of the drain valve V3, fluid within the upper chamber 31 of the pressure accumulator is driven back towards the sediment filter to backwash the filter screen thereof. Contemporaneously, chemicals within the chemical injector 21 are driven along with the backwash flow via capillary 24.

Abstract: A diffuser rod for use in a filter stalk having deflector disks rigidly mounted thereon to deflect liquid radially during the backwash process is disclosed. A backwashable filter element containing a diffuser plate that is located within the filter member at the end where the backwash fluid enters the filter member and a number of filter stalks with each filter stalk including a diffuser rod is disclosed. Finally, a method of backwashing a filter member that includes the step of introducing a diffuser rod and a diffuser plate to the filter assembly is disclosed.

Abstract: A fluid filter comprising a housing defining a fluid inlet and a fluid outlet, a filter element defining an upstream surface communicating with the fluid inlet and a downstream cylindrical surface communicating with the fluid outlet, the filter element comprising a stack of filter disks defining a hollow volume interiorly thereof and a longitudinal axis, and backflushing means for removing filtered out sediment from the filter element comprising an axially displaceable backflushing nozzle assembly disposed within the hollow volume comprising a rotating head coupled to the fluid inlet and having fluid outlet means, arranged to provide a generally radially directed pressurized jet and rotational motion of the rotating head.

Abstract: A filter backflushing system including an accumulator containing a pressurized bladder which propels a supply of backwash fluid contained within the accumulator in a reverse direction through a filter element. While the backwash fluid is pumped within the accumulator, an inert gas inside the bladder is compressed against the inside walls of the accumulator. Upon reaching a pressure of approximately 300-600 psi, the filtered fluid is released from the accumulator and the full energy of the compressed gas is released as well. This release produces a high pressure rapid burst of backwash fluid which effectively removes clogging contaminants from a filter element.

Abstract: In a method and apparatus for cleaning filters in which raw gas with particles suspended therein is conducted from a raw gas space to a clean gas space and through which intermittently a back-flushing gas is conducted from the clean gas space to the raw gas space, a flow dynamic control element is disposed in the clean gas space which blocks the outflow of gas from the clean gas space when a back-flushing gas is admitted to the clean gas space under a pressure, which exceeds the filter operating pressure so as to prevent excessive back-flushing gas losses during back-flushing. The flow dynamic control element is switched between an open and a blocking state by the pressure changes in the clean gas space without including any movable parts.

Abstract: The invention relates to a device for cleaning the filter surface of a filter element, through which the liquid to be filtered flows, during a filtration operation using a pressurised cleaning fluid. According to an improvement of the invention, a distribution device is provided which delivers an essentially even pressure distribution of the cleaning fluid over the entire area of the filter surface to be cleaned.

Abstract: A filter cartridge (20) and method for making a filter cartridge (20) for removing particulates from a particulate laden fluid stream moving one direction through the filter cartridge. The filter cartridge (20) is periodically subject to cleaning fluid moving in an opposite direction to the fluid stream. The filter cartridge (20) comprises filtration media (24) formed into a tubular configuration and having a plurality of circumferentially spaced apart pleats (26). A retention device (82) to limit radial movement of the filtration media (24) when subjected to the periodical cleaning fluid and to maintain the pleats (26) in the filtration media circumferentially spaced apart when exposed up to 130 degrees Celsius. Preferably, the extrudate (144) is thermoplastic, polyester, elastomeric material and at least one additive may be present. Multiple layers of the extrudate (144) may be fused together.

Abstract: A diffuser rod for use in a filter stalk having deflector disks rigidly mounted thereon to deflect liquid radially during the backwash process is disclosed. A backwashable filter element containing a diffuser plate that is located within the filter member at the end where the backwash fluid enters the filter member and a number of filter stalks with each filter stalk including a diffuser rod is disclosed. Finally, a method of backwashing a filter member that includes the step of introducing a diffuser rod and a diffuser plate to the filter assembly is disclosed.

Abstract: The aim of the invention is to improve the backwashing action of a backwashable filter for liquids comprising the following: a filter body which is located in a housing and which separates an incoming flow chamber from an outgoing flow chamber and a backwashing channel which lies adjacent to the filter body, is situated in the outgoing flow chamber and has a backwashing opening that faces towards the filter body, said backwashing channel also communicating with a source of a cleaning medium and said cleaning medium being subjected to pressure in the backwashing channel, and the filter body and the backwashing channel being moveable in relation to each other. To this end, the filter body has links on a side facing towards the backwashing channel which are set apart from each other in the direction of motion.

Abstract: A food waste disposal system having a separator for separating food waste solids from liquids. The separator includes a housing having a screw conveyor surrounded by a screen. The solids are introduced into the screen and conveyed by the screw conveyor toward the opposite end. The solids are compacted by the conveyor against a spring loaded member that adjustably blocks passage of the waste to an exit chute.

Abstract: A filter backflushing system including an accumulator containing a pressurized bladder which propels a supply of backwash fluid contained within the accumulator in a reverse direction through a filter element. While the backwash fluid is pumped within the accumulator, an inert gas inside the bladder is compressed against the inside walls of the accumulator. Upon reaching a pressure of approximately 300-600 psi, the filtered fluid is released from the accumulator and the full energy of the compressed gas is released as well. This release produces a high pressure rapid burst of backwash fluid which effectively removes clogging contaminants from a filter element.

Abstract: The present invention relates to a filtering device for preventing passing and blocking of unwanted particles in a suspension, which filtering device comprises an inlet and an outlet and a defined space between the inlet and the outlet, wherein the device comprises a filter means arranged in the outlet, that the filter means is arranged with openings, that the size of the openings permit particles of a size smaller than the openings to pass through, and at least one nozzle connected to a pressurised liquid source, capable of delivering a liquid jet, and arranged adjacent said outlet, wherein the said at least one nozzle is arranged such and directed such that particles that engage said filter means are removed therefrom by the liquid jet.

Abstract: A fine filter assembly for a dishwasher includes a filter body having an inlet and an outlet located substantially adjacent to one another, and an extended flow path joins the inlet and the outlet so that essentially an entire length of the filter body is used for filtration. The flow path is sloped from the inlet to the outlet and extends substantially 360 radial degrees around a circular outer perimeter of the filter body. Therefore, wash fluid naturally flows from the fine filter inlet to the fine filter outlet all the way around the filter body, and substantially the entire filter body is flushed when the fine filter is drained and a main pump assembly is energized.