Abstract: A sieve filter for fluid lines, especially for hydraulic pressure lines (2) in internal combustion engines which is formed of a hollow cylindrical main body (3) with a fluid inlet (4) and a fluid outlet (5), and of a fine mesh filter element (6) for through flow by fluid which has a bypass function when the filter element (6) is stopped up or filtering highly viscous fluid. The sieve filter (1) is biased by a spring element (7), and is insertable together with the spring element (7), between two axially spaced opposing surfaces (8, 9) inside the pressure line (2) such that its fluid inlet (4) and the spring element (7) are prestressed against the opposing surfaces (8, 9), whereby the main body (3) of the sieve filter (1) closes a bypass fluid channel passing the filter element (6) which is clearable through an axial displacement of the main body (3) against the force of the spring element (7) resulting from the rise of fluid pressure on the filter element.

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 liquid circuit for filtering a liquid, comprising a liquid storage vessel (10), a liquid pump (17), a consumer or user device (14), a filter element (23) and a controller (24). A heated liquid can be supplied at least partly to the filter element (23). The liquid circuit may be used in liquid systems in which a liquid, such as water, oil or fuel, is filtered and at least part of the liquid is returned to the storage vessel (10). The liquid is pumped in the liquid circuit from the storage vessel (10) by the pump (17) through lines (11, 13, 15, 16), filtered by filter element (23) and supplied to the consumer device (14). Excess liquid not required by the consumer device (14) is returned through liquid return line (15) to the controller (24) which directs the liquid either to the filter element (23) or the storage vessel (10), depending on the liquid temperature.

Abstract: An engine block on an engine with angled oil outlets adapted to engage a reusable fluid filter, consisting of: a pre-cast filter-connecting segment; the pre-cast filter-connecting segment having a filtered oil inlet in fluid communication with the engine and also including a number of angled oil outlets in fluid communication with the engine. The angled oil outlets are arranged circularly about a central axis of the pre-cast filter-connecting segment, and extend downwardly from the engine block at a first angle and outwardly at a tangent to a cylindrical reference surface parallel to the central axis.

Abstract: The invention relates to a system for delivering elastomeric media, the system consisting of a gear pump (1) and a screw-type extruder (10) which, viewed in the delivery direction (6) of the pumping medium, is arranged in front of the gear pump (1) and which consists of a screw (11) and of a screw casing (12).

Abstract: A die lube recovery and recycling system includes a weir tank, a filtration assembly, and a holding tank. The weir tank receives used, dirty die lube and filters large particles therefrom. Preliminarily filtered die lube is pumped through the filtration assembly and reconditioned die lube is delivered to the holding tank. A level of reconditioned die lube in the holding tank is monitored and, the die lube is replenished with fresh die lube from a fresh die lube source when the level falls below a predetermined level. A die lube pressure booster is used to withdraw die lube from the holding tank, pressurize the withdrawn die lube, and spray the pressurized die lube on a die in a casting machine.

Abstract: In a collection container for bulk material with a conveying pump (204) or a suction tube arranged off center, with a container wall (202), and a substantially level container bottom, at least one removing arm (210) is adapted for movement in the vicinity of the container bottom. The removing arm (210) is arranged on a traction means and guided in the region of the container wall (202).

Abstract: A filter unit in a fluid circuit associated with a machine tool that uses machining fluid is maintained by counting the number of times the machine tool is operated and automatically servicing the filter unit, as by backflushing, after the machine tool has been used a preset number of times. A filter unit control unit counts the number of uses of the machine tool and moves valve units in the filter unit from an operational configuration to a backwash configuration and controls the timing and operation of the filter unit maintenance cycle.

Abstract: A filter device for separating water and other impurities from liquid fuel including a housing body (11), inside which a first filter element (12) is disposed; a collector vessel (17) which is disposed underneath the filter element (12); a pump (25) which is used to remove water present in the collector vessel (17), and a detector (23) which is used to determine whether water has accumulated in the collector vessel (17).

Abstract: A vacuum assist system and process for handling cutting fluid and chips collected from a series of machine tools includes a closed header pipe extending below a series of sumps associated with the machine tools, the sumps draining into the header pipe. The header pipe has a down leg extending vertically down to a filter tank which is opened periodically to drain the header pipe, developing a vacuum which assists the flow of liquid down the header pipe so as to insure a sufficient flow velocity in the header pipe to carry the collected chips out of the header pipe and into the filter tank with the cutting fluid.

Abstract: A filter, especially a filter for lubricating oil of an internal combustion engine, including an inlet for the raw liquid and an outlet for the clean liquid. A filter insert (12) is arranged inside the filter, as well as a valve, such as a pressure relief valve (23). Parts of the valve are provided with coatings, for example hydrophobic coatings of polytetrafluoroethylene or silicone. The filter can also contain a heating element (34) in the vicinity of the valve.

Abstract: A filter arrangement for use with a vessel that receives fluid includes a body engageable with the vessel. The body has an inlet port, an outlet port, a body cavity, a first fluid path disposed between the inlet port and body cavity, and a second fluid path disposed between the body cavity and the outlet port. A filter is disposed at least partially in the body cavity, and includes a filter cavity and filter media for filtering the fluid. A valve is associated with the body for allowing the fluid to flow into and out of the vessel. When the fluid flows into the vessel, the fluid flows through the filter cavity and along the first fluid path without flowing through the filter media. When the fluid flows out of the vessel, the fluid flows along the first fluid path, through the filter media and along the second fluid path.

Abstract: Device for separating two non-mixable liquids with different specific gravities such as oil and water, which device contains a first separation tank (2) with an overflow (11, 12) for each of the liquids to be separated, a coalescence filter (3) whose inlet (14) is connected via a pipe (13) to the overflow (12) of the first separation tank (2) for the liquid with the highest specific gravity and a second separation tank (4) which is connected to the outlet (19) of the coalescence filter (3), characterized in that the overflow (12) onto which the coalescence filter (3) is connected is situated higher than the inlet (14) of the coalescence filter (3) with a difference in height H1 which is such that the liquid mass in the pipe between the first separation tank (2) and the coalescence filter (3) provides for the necessary pressure to bridge the pressure drop in the coalescence filter (3) and the counterpressure of the liquid in the second separation tank (4).

Abstract: A filtration system includes a magnetic drum for removing ferrous shavings and a dual canister filter unit equipped with replaceable filter bags. This palletized system may be plugged into most machine tools to filter the shavings-laden coolant to remove the metal shavings, tramp oil, sludge and dirt from liquid coolant to extend its useful life and minimize or eliminate down time.

Abstract: A liquid contaminant separation system that includes a liquid surface skimmer having an interior with a wall perimeter sealed by a vertically sliding float. The float has a tubular body with slots in the tube wall, and a vortex cavity in an upper section thereof. The structure of the float provides for flow of liquid from a supply reservoir through the slots in the float wall, over a top edge of the float into the vortex cavity, and then down into the collection reservoir of the float. The float level is determined by the level of liquid in the collection reservoir. Vertical slots in the wall of the collection reservoir extend above the level of liquid in the supply reservoir. The float body must be sufficiently iong so that lower ends of the slots are blocked by the float body. This ensures that liquid from the supply reservoir will flow into the float only at the top edge of the float, thereby enabling the system to effectively separate the desired liquid from the contaminating liquid.

Abstract: A replaceable fluid filter cartridge for a filter assembly which includes a housing and a centerpost is designed to include a generally cylindrical filter element having a sidewall which defines a hollow interior and an endplate bonded to one end of the filter element. The housing includes a pair of electrical contacts that are provided at a precise location within a base portion of the housing. A data component, which may be a sensor, data chip, resistor or electrical connection strip, is assembled to an exposed surface of the endplate and is arranged with a pair of spaced-apart electrically-conductive strips. The strips are adapted to make electrical contact with the housing contacts. An electrical contact is made between the data component and the housing contacts such that when the data component is energized, the data component is able to provide filtration data information to a remote station.

Abstract: A mechanical oil filtration and oil flow re-direction system for a hydraulically actuated valve lifter. Pressurized oil is directed to the lifter through a series of controlled clearance passages prior to gaining access to the internal cavity of the lifter. Once inside the lifter, the oil is deflected off of an insert that directs the oil towards the upper end of the lifter and the push rod seat. The oil flow is then directed downwards into an oil deflector supply hole and into the internal cavity of the lifter and the chamber containing the lifter check ball and seat. In use, the system restricts particulates from the lifter, and re-directs particulates that do access the lifter to pre-determined locations within the lifter to minimize operational impairment of the lifter from particulate contamination.

Abstract: A fluid recovery system for an automatic transmission unit of a vehicle, provided with a tank containing a fluid, a hydraulic circuit receiving this fluid from the tank, an electrovalve unit supplied by the hydraulic circuit and adapted to control actuator units in order to actuate the opening and closing of a clutch and to perform the selection and engagement/disengagement of the gears of a gear change, the system comprising at least one collection zone adapted to recover the fluid escaping from the actuator units and at least one duct connecting the collection zone to the tank so that the fluid recovered in the collection zone can be returned to the tank.

Abstract: A frame-like nozzle for liquid coolant disposed above a machining tool is connected to a vertical main shaft. The nozzle is coaxial with the main shaft and directed downward. The nozzle has an inner peripheral wall, an inner flange formed in or close to the inner peripheral wall, an upper framework having a ceiling serving as a guide surface, and a lower framework. The liquid coolant flows upwardly out from the inside channel in a planar radial manner. The upper framework has an outer peripheral wall serving as an outside guide surface for downwardly bending the liquid and cooperating with the flange to define an outside channel. A flow agitating recess is formed in the wall surface. The lower framework includes a level difference, and forms a floor by which the coolant reaching the lower end of the outer peripheral wall is guided radially inward through the difference. Coolant is allowed to flow downward. The inner edge of the floor defines a circulatory waterfall opening.

Abstract: A contaminant flushing machine for removing contaminants from a container, such as an engine transmission or transmission cooler which includes hoses for coupling to the transmission cooler and a pump for circulating fluid through the hoses and the transmission cooler and a fluid filter having a reduced tendency towards causing vaporization of the fluid. Also included in the contaminant flushing machine is an automatic aeration system for injecting air into the circulating fluid at predetermined intervals. Additionally, a reverse flow piping circuit is included to permit automatic and electric manipulation of the flow direction of fluid through said transmission cooler while at the same time not altering the direction of flow of fluid through the filter and the pump.

Abstract: A device for regenerating the cooling emulsion (3) stagnating in the tanks (2) of the machine tools, characterized in that the proliferation of anaerobic bacteria responsible for the evil-smelling deterioration of said emulsion (3) is suppressed by the use of a plurality of oxygenation pipes (1) submersed in the cooling liquid and capable of producing air microbubbles that ensure a sufficient and uniform oxygenation of the emulsion and avoid the formation of the typical, continuous lubricating oil layer above the coolant (3). Said oxygenating microbubbles causes also a continuous displacement of the cooling emulsion (3) that reduce the risk of dissociation of the emulsion itself. Pipes (1) submersed in coolant (3) in tank (2) have holes (5) allowing internal pressurized air to escape regularly and to oxygenate cooling liquid (3).

Abstract: A rotomolded hydraulic reservoir includes a plastic container body defining a container cavity for receiving hydraulic fluid and forming a filter cavity in fluid communication with the container cavity. An insert, such as an aluminum bushing, is molded in the container body adjacent the filter cavity and a removable filter element positioned with the filter cavity and coupled to the insert.

Abstract: An automatic oil filter replacement assembly for a locomotive including a plurality of oil filters mounted within a cartridge. The filters are mounted within the chamber. An indexing plate, mounted to the cartridge, has a single portal for alignment within a selected chamber and filter. The operating system of the locomotive is adapted so an operator may remotely rotate the indexing plate a given distance after certain set parameters have been reached, so a clean filter, or filters, replace exhausted filters.

Abstract: An apparatus for removing floating and subsurface contaminants from a machine tool coolant bath is disclosed. The apparatus comprises a floating skimmer for collecting floating contaminants from the surface of the bath connected to an oil trap having an imperforate shell with a fluid tight column extending below the interface. A return conduit and a positive displacement pump are in series with the skimmer and oil trap. A submersible pump is disposed in the bath near the bottom for collection of water and water density contaminants and is connected to a remote filter assembly having a housing and a removable filter element. The filter assembly and the oil trap are both accessible without affecting the operation of the machine.

Abstract: A lapping compound holding tank (60) positionable at least partially below the lapping chamber of a lapping machine. The cylindrical tank is rotatable about its axis and includes a fixed mixer and scraping assembly (80) positioned in the tank. The mixer and scraping assembly provides strong small-scale turbulence or even scraping action very close to the bottom (64) of the tank. The tank configuration enables efficient use of floor space since the tank occupies much of the same area as the lapping chamber of the machine. There are fewer potential accumulation surfaces between the lapping chamber drain and the tank. Cost and complexity of the tank is reduced. The present invention also includes an in-line compound filtration system (120) comprising an inlet section (122), a funnel portion (128) having a tubular portion (130) and an outlet (132), and a removable magnetic unit (134) having a cylindrical magnet (136).

Abstract: A sump pan for a device such as a transmission or engine lubricating system includes an upper chamber and a lower chamber which are separated by a partition. The partition has an opening therethrough in which a filter media is positioned for filtering dirty fluid in the upper chamber so that clean fluid collects in the lower chamber. A suction tube extends through the partition for pulling the clean fluid for recirculation through the device utilizing the fluid such as a transmission or an engine. A bypass valve is also disposed in the partition so that if the fluid becomes too viscous to pass through the filter media, or the filter media becomes clogged, the bypass valve will open so that the fluid can still circulate.

Abstract: The invention provides a filtration apparatus for filtering and regenerating a machining fluid. The filtration apparatus includes a dirty tank for receiving the machining fluid and a clean tank fluidly connected to the dirty tank. A filter is provided between the dirty and the clean tanks for filtering the machining fluid which flows from the dirty tank into the clean tank. A conveyer mechanism is provided in the dirty tank for conveying the sediment of particles separated from the machining fluid in the dirty tank. A filter cleaning device are provided for cleaning the filter. The filter cleaning device includes a nozzle bar which is provided in the clean tank for rotation within a plane parallel to the filter means. The nozzle bar directs the machining fluid in the clean tank onto the filter means to blow the particles off the filter means into the dirty tank.

Abstract: Sludge accumulations can be quickly removed from a vat containing liquid resin, by a manual mechanism that includes a porous platform adapted to rest on the vat bottom wall. Lifter arms extend upwardly from the platform to mount lifter handles at the vat upper edges. The handles can be pulled upwardly to lift the porous platform out of the vat. Sludge is retained on the platform, while liquid resin drains into the vat.

Abstract: Apparatus for maintaining the condition of cutting fluids in a machine tool sump and for the removal of tramp oil from the cutting fluid has a pump to draw cutting fluid from the machine tool sump and transfer the fluid to an auxiliary tank where the fluid outlet is directed to drive a turbine wheel for rotation of a shaft and simultaneously aerate the cutting fluid. Drums on the shaft are partially submerged so as to be wetted by the tramp oil content. Wiper blades bear against the drum surfaces to strip the tramp oil from the drums as they rotate. A collecting trough is positioned below the wiper contact line to receive the tramp oil as it is stripped from the drum and drain it off to a waste container. In this manner, the cutting fluid is in constant circulation, even when the machine tool is idle.

Abstract: Apparatus for maintaining the condition of cutting fluids in a machine tool sump and for the removal of tramp oil from the cutting fluid has a pump to draw cutting fluid from the machine tool sump and transfer the fluid to an auxiliary tank where the fluid outlet is directed to drive a turbine wheel for rotation of a shaft and simultaneously aerate the cutting fluid. Drums on the shaft are partially submerged so as to be wetted by the tramp oil content. Wiper blades bear against the drum surfaces to strip the tramp oil from the drums as they rotate. A collecting trough is positioned below the wiper contact line to receive the tramp oil as it is stripped from the drum and drain it off to a waste container. In this manner, the cutting fluid is in constant circulation, even when the machine tool is idle.

Abstract: A coolant liquid feeding method comprises feeding a coolant liquid, with air bubbles caused to form continuously therein, for cutting or grinding operation to a region under machining, expediting the splashing of air bubbles in all directions when the air bubbles impinge on the region under machining and burst, and also expediting the entry of accelerated splashed liquid particles into a cutter/workpiece pressure contact plane, thereby improving the cooling and lubrication of the region under machining, whereby the air bubbles in the coolant liquid which has failed to reach the region under machining or which, though reaching there, has left there for the recovery channel are allowed to adhere to suspended foreign matters in the liquid, thereby expediting the surfacing of the foreign matters.

Abstract: Apparatus for improving the efficiency of filtering fluid of a hydraulic system, including a venturi adapted for connection to a first fluid carrying conduit of the hydraulic system for receiving a flow of the fluid therefrom, the venturi having a restricted passage extending therethrough and an orifice communicating therewith, a diverter conduit connected in communication with the orifice and with a second fluid carrying conduit of the hydraulic system, the diverter conduit containing a restricted orifice therein, and the venturi having an outlet connected in fluid communication with a filter, wherein the flow of the fluid through the restricted passage of the venturi will generate a reduced pressure condition in the diverter conduit to divert at least some of the fluid in the second fluid carrying conduit of the hydraulic system into the diverter conduit so as to pass into the venturi and flow onto the filter, the reduced pressure condition being weak or strong in correspondence to the fluid flow through th

Abstract: An installation apparatus for a powered roller drive unit (11) to propel and convey objects, is provided wherein the roller drive unit is fixed to the floor (13) of an installation channel (12) of the apparatus. The installation apparatus includes a trough (14) attached to the floor (13), preferably in the region of and beneath the roller drive unit (11) for draining water.

Abstract: An apparatus and method for separating a first liquid phase from second liquid phase and entrained air and solids. More particularly, the apparatus removes tramp oil, metal shavings and other solids from coolant used in metal-working machines. The apparatus can also be used to remove air and solids from a single liquid phase. The apparatus is compact and simple to use. It overcomes many of the disadvantages of prior art devices, including their tendency to become plugged with oily material.

Abstract: A system for reusing water soluble slurry waste fluid wherein separated available abrasive grains and extracted water soluble coolant are reused. This system is capable of reducing a disposal cost due to a reduction of a load to a waste water disposal plant by effectively reusing water soluble slurry waste fluid, and making a contribution to a reduction of a total slicing cost by reusing abrasive grains and water soluble coolant.

Abstract: A circulation system is capable of dual functions of providing an electrode discharge machine with water or oil to serve as a finishing fluid for the process of drilling fine holes in a work piece of an aluminiumn, steel, or tungsten steel material. The circulation system comprises an oil-water separating tank, a water filtration tank, an oil filtration tank, a water purifying device, and a control computer. The water purifying device is connected in parallel with a discharge conduit from the water filtration tank for recirculating flow to the oil-water separating tank.

Abstract: An apparatus 46 for receiving metalworking fluid from a sump 12 of a machine 10 is disclosed. Various construction details are developed which provide for the collection of fluid and increasing the concentration of tramp oil in the collected fluid. In one embodiment of the invention, the apparatus includes a colllection chamber 48 having an interior 54 which is in flow communication through an opening 58 in a wall 56 of the chamber with the top most layer of the metalworking fluid.

Abstract: An apparatus 18 for processing metalworking fluid disposed in a sump 12 beneath a machine 10 is disclosed. Various construction details of the apparatus are developed and provide for removal of tramp oil from the working medium fluid and the aeration of the metalworking fluid to retard the formation of anaerobic bacteria. In one detailed embodiment, the apparatus includes a circulation system 42 having a by-pass flowpath 82f for supplying pressurized metalworking fluid to a fluid distribution system 14 and thence to the sump.

Abstract: A method for processing metalworking fluid disposed in a sump 12 is disclosed and includes the step of collecting metalworking fluid having a greater concentration of tramp oil than the concentration in the sump and flowing a portion of this oil, without passing the oil through a separator, to increase circulation in the sump. Various steps of the method are developed which increase the level of tramp oil removed from the sump and provide for the introduction of oxygen into the working medium of fluid. In one particular embodiment of the method, the step of flowing the return fluid under pressure to the sump, includes forming jets of fluid which extend vertically into the air to aerate the metalworking fluid and block the proliferation of anaerobic bacteria.

Abstract: An under counter dish washing machine has an upper spray assembly with a spray base recessed at the top of the wash compartment. An enclosed control housing is provided around the recess to house various controls in order to make use of what is otherwise wasted space. The sump of the machine is covered by a screen having an opening in which a pump filter moves up and down to open and close the drain opening. The filter has a perforated body so that all water draining to the sump must pass through either the screen openings or the perforations of the pump filter. The supply hose which delivers water to the machine is relieved from constant water pressure by a solenoid valve which closes except during a fill cycle of the machine.

Abstract: A collection container with transport pump (4) for conveying liquids containing production residues, for instance chips, coolant and lubricant. The collection container (1) is developed as a cylindrical pot with a substantially flat container floor (5). A rake which travels over the container floor (5) conducts the chips which have deposited on the container floor to the transport pump (4). The collection container thus has a slight structural height and assures optimal removal of the chips by means of the transport pump.

Abstract: An apparatus for on-site engine oil reconditioning comprises an apparatus configured and arranged for changing oil by removing spent oil from, and introducing reconditioned oil into an internal combustion engine. A mechanism, in fluid communication with the oil changing apparatus, removes finite particles from the spent oil to produce particle-free oil. A mechanism, in fluid communication with the finite particle removing mechanism, refines the particle-free oil to remove water, fuel, and/or glycols to produce re-refined oil. A mechanism, in fluid communication with the refining mechanism, adjusts the composition of the re-refined oil to meet a predetermined specification to produce the reconditioned oil.

Abstract: An apparatus for filtering and cooling liquid, with four filtration chambers are connected by a series of passageways. The apparatus is mounted on a cart so that it may be rolled into position under a machine quickly and easily. Once the apparatus is in position, the machine is drained of its debris-laden oil which flows directly into the first chamber and through the first wire mesh filter. The liquid is then forced either by gravity or by pressure through the remaining chambers and their respective filters which have progressively smaller pore sizes. The tortuous movement of the liquid around the weirs helps to cool the liquid while the filters remove foreign particles from the liquid. Once the liquid reaches the fourth chamber, a pump is used to pump the cleansed liquid back into the machine so that it may be reused. The inlet to the pump may be fitted with an optional fifth filter element.

Abstract: A coolant reclamation device for use in conjunction with a conveyor of a first width wherein the conveyor receives solid contaminants and coolant from a machine tool operation. The conveyor transports the solid contaminants and coolant to the coolant reclamation device. The coolant reclamation device includes an elongate body which defines a chamber and contains an elongate opening which provides direct access to the chamber. The device also includes an elongate screen located over the opening. The coolant reclamation device is positioned relative to the conveyor so that the solid contaminants and coolant discharged from the conveyor impinge the screen whereby the solid contaminants remain on the surface of the screen and the coolant passes through the screen into the chamber. The elongate body contains a return port through which the chamber is in fluid communication with the coolant reservoir via a conduit.

Abstract: A fluid filter (10) includes a housing (14), a mounting head (16), a filter element (34), and a pressure sensor (54) mounted to the housing (14) and having a high pressure port (58) communicating with the high pressure side (36) of the filter element (34) and having a low pressure port (60) communicating with the low pressure side (38) of the filter element (34) to sense the pressure drop across the filter element.

Abstract: A filtration apparatus, used for obtaining cutting oils cleaned by using filtration apparatus so as to reuse the separated cutting oil in machining operations, includes an oil tank for storing filtered cutting oil, a storage tank for temporarily storing the filtration target cutting oil, a rotatably driven filtration drum, rotatably supported in the storage tank and having a side-surface in order to let a filtered oil to flow into the liquid tank, a dynamic seal member provided between the filtration drum and side wall of the storage tank, an injecting means for washing filters and dip-up plates for continuously conveying cutting downward from a charge port to discharge port.

Abstract: An improved power steering pump integrates into a single assembly the pump (10), the reservoir (20) and a filtration system. The reservoir (20) includes upper and lower chambers (26, 24) and a primary filter (40) therebetween. The filtration system may also include a secondary filter (42) for providing filtration of fluid added through a filler device (31). The reservoir (20) may also include a bypass chamber (30) and a fluid bypass (66) with a bypass valve (68) for permitting fluid to bypass the primary filter (40) in the event the fluid exceeds a predetermined viscosity.

Abstract: A working fluid containing dispersed abrasive grains is used in abrasive machining, and a used working fluid contaminated with cutting chips or swarf produced during the abrasive machining is processed by first filter device, so that the abrasive grains in the used working fluid is recovered in the form of a suspension to provide a reclaimed working fluid in which the amount of the cutting chips is reduced. The used working fluid is reclaimed by the device, and the useful abrasive grains included in the used working fluid can be efficiently utilized without being discarded, whereby the abrasive grains in the working fluid is effectively utilized and the working cost is reduced. The device employs a so-called cross flow filtration system, wherein filtration films have mesh openings which are sufficiently smaller than an average grain size of the abrasive grains.

Abstract: A centrifugal soil separator for a dishwasher having a rotating centrifuge connected for rotation with a centrifugal impeller, the centrifugal impeller providing a majority of recirculating wash water for the dishwasher while the centrifuge accepts a second portion of flow and spins that portion of flow for soil separation and to achieve a pumping action to move that quantity of water to the wash water delivery system with the quantity of water moved by the centrifugal impeller. By a coordinated stopping, reversing and starting action of the centrifuge, soil collected therein can be disposed to a soil sizing and drain apparatus for flushing and draining the centrifuge.

Abstract: A filter flushing arrangement is provided and includes a first filtering device, a second filtering device, and a valve arrangement connected to the first and second filtering devices. The valve arrangement is operative to change the direction of fluid flow through the first filtering device upon a filter element therein becoming clogged to flush the particles to the second filtering device which collects the particles on a filtering element therein and subsequently allows the foreign particles to freely settle to a collection basin. Some form of vibration and/or a burst of fluid from a fluid accumulating mechanism may be used to free the particles therefrom and allow them to settle to the collection basin. The collection basin is capable of collecting the particles over a long period of operation of the fluid system.