Abstract: A fluid filter which comprises a canister having an open end and a closed end, the canister sealing to an adapter body to prevent leakage between the canister and the adapter body, the adapter body having a plurality of angled fluid inlet ports extending through the adapter assembly body into the cavity formed by the canister and the adapter body assembly, a threaded fluid outlet port extending through the adapter body, a threaded ring adapter for adapting the outlet port to a variety of filter receptacles, a multistage wire mesh filter element having a weave which is designed to prevent fluid contaminants from passing through the filter element while inhibiting the contaminant particles from becoming lodged in the filter mesh, the fluid inlet ports in the adapter body being formed at an angle to create a tornado type turbine fluid motion within the canister to suspend contaminants which are blocked from passage through the screen in the fluid and allow such contaminants to settle in the canister out of the f

Abstract: A screening device for pulp production includes a cylindrical container for continuous flow-through of a fiber suspension and further includes an inlet to the container and an outlet for the fiber suspension, a moveable support member mounted in the container and which supports hollow screening members for vertical movement; a tubular enclosure open at opposite ends is mounted on the supporting member which enclosure has a moveable piston mounted therein, a hydraulic cylinder being connected to the piston to move the piston in a portion of the enclosure with the hydraulic drive mounted outside of said container with transmission members connected to said supporting member which will therefore absorb the reaction forces generated in moving the piston.

Abstract: The liquid purification system of the present invention has a double-tank structure comprising an inner tank and an outer tank that are in communication with one another so that either one of the microfiltration means and the adsorption means may be accommodated is in the inner tank, and the microfiltration means or the adsorption means that is not accommodated in the inner tank may be accommodated in the outer tank, with the disinfection system being provided on the liquid line connecting the inner and the outer tanks. Since the liquid purification system of the present invention has such an arrangement, the system is quite compact in size to facilitate an easy installation and maintenance at low cost while the system satisfies various performances required for the system used for the purification by filtration, disinfection and adsorption of pool water; drinking water and beverages; industrial water; waste water; rain water and water from river, lake or sea; and the like.

Abstract: A liquid filter includes an openable filter housing. The liquid filter has an unfiltered-liquid inlet and a clean-liquid outlet. A first filter element is arranged in the filter housing. The first filter element has an essentially hollow-cylindrical design, with the liquid flow travelling through it from the outside to the inside. An additional hollow-cylindrical filter element is arranged inside of the first filter element, wherein the liquid flow is also from the outside to the inside through the additional filter element. A separating wall is disposed between the two filter elements. The entire filter has a compact construction with a large effective filter area.

Abstract: An interior wedge wire drum screen is mounted wholly within an exterior drum screen of narrower wedge wire spacing, and both are mounted to a frame and caused to rotate about a common central axis. One end of the outer drum is open and the other is closed by a disc-shaped drum head. The inner drum has an open end which is spaced inward of the open end of the outer drum. The waste water is presented to the surface of the inner drum screen by a waste water infeed which employs a vertical column. The column extends upwardly of an inlet and has a gradually increasing cross-section for reducing the flow of velocity of the waste water. A horizontal trough extends along the axis defined by the drums and communicates between the top of the column and a tray. The edges of the tray terminate in weirs which are parallel to the sides of the inner drum. Water flows in a smooth sheet over a weir to impact the sides of the inner screen with low velocity.

Abstract: A filter for an in-tank pump of an automobile fuel tank includes a flat bag-shaped filter body, a connector body and a suction nozzle. The filter body has a closed front end and a rear end wall and includes a mesh member and a filter frame having a plurality of longitudinal and lateral ribs formed on the upper and lower portions thereof. The connector body includes a cylindrical attachment for attaching the filter body to a suction port of an in-tank pump and an end plate joined to an outer surface of the rear end wall of the filter body. The suction nozzle is attached to the end plate of the connector body so that it communicates with the cylindrical attachment and thrusts into the filter body. The suction nozzle is made of a deformable material and formed into a mesh cylinder having a closed forward end disposed within the filter body at a position of the closed front end of the filter body.

Abstract: A filter for a refrigeration unit having a heat exchange fluid supply conduit. The filter is a substantially cylindrical filter screen having a radial flange disposed at each end. One or more filters are disposed along the entire length of the fluid supply conduit to maximize the surface area of the filter screen. Each radial flange has a gasket disposed thereon for providing a seal that prevents the fluid from circumventing the filter screen of the one or more filters. As fluid passes through the conduit, it flows radially through the filter along the entire length of the conduit thereby reducing the adverse effect on fluid pressure in the conduit and passes through the screen, into a volume defined exterior to the filter, thereby minimizing the pressure drop experienced along the fluid supply conduit.

Abstract: A filtration apparatus specifically intended for removing particulate contaminants from commercial laundry waste water has at least one porous mesh-like filter bag coupled between an inlet manifold for receiving waste water containing particulate contaminants and an outlet manifold for discharging the particulate contaminants separated from the waste water. The filter bag is agitated by a paddle, so as to prevent the mesh-like material of the filter bag from being clogged. Also disclosed is a method for filtering waste water containing particulate contaminants.

Abstract: A filter assembly for an internal combustion engine includes inner and outer coaxial filter elements disposed in a spin-on canister which is detachably secured to a mounting adaptor. Oil from the crankcase is filtered by the outer filter element and a substantial volume of the filtered oil flows to the primary lubricating circuit of the engine. A small percentage of the filtered oil is subjected to further filtration by the inner filter element and is returned directly to the crankcase. A single gasket including a sealing ring and a concentrically disposed tubular fitting attached to the sealing ring by support legs is positioned to prevent commingling of the oil from the crankcase with oil filtered by the outer filter element and to prevent the oil filtered by the outer filter element from commingling with oil filtered by the inner filter element. In addition, the inner filter element is provided with a warm-up orifice to insure oil flow regardless of the condition of the inner and outer filter elements.

Abstract: The present invention is related to a water filter and particularly to a water filter with a rotary filter tube, comprising a water filter cylinder and a plurality of filter leaf thimbles so that there is a maximum filter course in a certain filter space for water filtering. It is very convenient to replace the filter leaves (thimbles) outside the water inlet pipe (port).

Abstract: An oil filter for use in heavy duty internal combustion engines is disclosed herein. The oil filter includes an exterior tube with perforations, an interior tube with perforations, a spring located inside the interior tube, a lower and an upper end cap attached to first and second ends of the exterior and interior perforated tubes, respectively, and two pleated layers of filter media concentrically located between the interior and exterior perforated tubes without any stabilizing means located between the layers of filter media. The two layers of filter media are formed of a substantial portion of pulp of fibers that contain lignin to reduce softening and swelling of the filter media upon contact with water.

Abstract: The invention is an improvement in a known cylindrical, annular fluid filter cartridge of the type having a lower end cap supporting spaced, concentric filter elements. The spaced elements define an effluent path therebetween. In known cartridges of the foregoing type, the inner and outer perimeters of the end cap (or either of them) have a significant circumferential "Perimeter of engagement" which seats into a pocket with friction fit. As a result, significant force is required to remove a cartridge, especially a large cartridge, from the housing. The improvement comprises a channel (either a tube-like riser or a manifold) and a discharge port for receiving effluent, e.g., filtered water, from the effluent path. The discharge port (with its relatively small perimeter of engagement) is configured and arranged for attachment to and detachment from an outlet vent located near the bottom of the cartridge housing.

Abstract: The device is the dual functional filter of the slurry, scraping of the filtered cake, compression the scraped cake and discharging the compressed cake, continuously. The device is composed of both the filter part and the cake compression part. While the filter part is positioned upward holding the filtrate room, the slurry chamber and the filter medium in between, the lower cake compression part contains the screw blade attached to the shaft stationed from the top of the filter part to the end of the cake compression part. The filter cake piled on the filter medium during the filtration of the slurry fed under pressure, is scraped by the scraping blades attached to the shaft or, if necessary, peeled off by the pressure flashings of the back wash liquid through the cake on the filter medium. Precipitated cakes from the above is compressed in the compression part by the screw.

Abstract: Disclosed is a filter press comprising a substantially cylindrical vessel, a plurality of filter elements disposed in the vessel parallel to one another, and a rotor having a rotor shaft rotatably mounted in the vessel and a plurality of rotor elements fixedly connected to the rotor shaft and extending each between two adjacent filter elements, the surface of the rotor elements being adapted to be forced towards the filter elements for mechanically compressing filter cakes accumulated thereon, wherein the axis of the vessel is disposed in an upright position, the filter elements and rotor elements being formed as cylindrical wall members disposed in concentric relationship to one another with the rotor elements extending into the spaces between adjacent filter elements and being secured to a mounting structure connected to the rotor shaft, while the filter elements are supported on a carrier grid in the vessel.

Abstract: The liquid filter assembly including a filter housing with an inlet below a prescribed external liquid level and having a generally cylindrical filter unit inside it with reusable filter elements which effectively operate at low pressure drops and permitting bypass liquid to recirculate within the filtered section without passing through the filter element and providing a filter support frame having the filter element supported thereon to provide a changeable filter assembly unit sealingly mounted within the housing.

Abstract: A reactor for recovering metals such as copper, tin and lead from concentrated, acidic aqueous solutions includes a reaction vessel retaining a bed of scrap aluminum in a packed bed above the bottom of the vessel; a plenum below the packed bed of scrap aluminum, and a filter situated within the plenum, including a first perforated pipe enclosing a coaxial second perforated pipe, through which liquid can be filtered and withdrawn for recirculation into the reactor above the packed bed of scrap aluminum. Metal recovery is effected by reduction of metal ions in solution and precipitation onto the scrap aluminum. Multiple reactor systems including equipment required for pH adjustment of the wastewater also may be used.

Abstract: In a fuel filtering device for a fuel pump (6) which is arranged in a liquid fuel tank (1) of vehicles and feeds the liquid fuel to an engine, there is provided a screen (17, 23) which is for filtering the liquid fuel (2) and is constituted as a bag with a bottom part thereof disposed in contact with or close to an inside wall of the bottom of the fuel tank and covers a suction opening (16) of a suction tube (15) and at least a part of the suction tube (15), the screen (17, 23) being constructed with a dense web which forms a substantially air-tight liquid film by soaking the liquid fuel (2) which makes contact with at least the bottom part of the screen (17, 23) when the screen is partially immersed in the liquid fuel (2).

Abstract: A filter assembly for an internal combustion engine includes inner and outer coaxial filter elements disposed in a spin-on canister which is detachably secured to a mounting adaptor. Oil from the crankcase is filtered by the outer filter element and a substantial volume of the filtered oil flows to the primary lubricating circuit of the engine. A small percentage of the filtered oil is subjected to further filtration by the inner filter element and is returned directly to the crankcase. A tubular fitting extends between end caps on the two coaxial filter elements to establish communication between the inner filter and the mounting adaptor, to separate the two flow circuits, and to maintain a fixed axial spacing between the two filter elements.

Abstract: Backflushing with internally mounted pistons and cylinders is provided in a pulp treating vertical vessel such as a paper pulp thickener, diffuser, or displacement bleacher. First and second sets of screens are mounted on a supporting arm/conduit within the vertical vessel, the first screens mounted directly to the arms and the second screens mounted on top of the first screens. A first cylinder is connected at one open end to the conduit and at the other open end is exposed to the pulp within the vessel. A second cylinder is mounted so that it is concentric with the first cylinder and both ends are in operative communication with the liquid conduit. A piston is mounted within each cylinder by a common vertically extending piston rod which connects them. The pistons and cylinders have different effective diameters.

Abstract: A fluid filtering device includes a housing having an interior chamber with an open top and an inlet and outlet open to the chamber. An annular seat is secured to the housing within the chamber in a position spaced downwardly from the open top so that the seat protrudes inwardly into the chamber. A filter element is removably insertable into the chamber through its open top and to a filtering postion in which the filter element is positioned between the housing inlet and outlet. The filter element includes an outwardly flanged portion which abuts against the seat when the filter element is in its filtering position. A cover is detachably secured over the open top of a housing and a spring member is secured at one end to the filter element to extend upwardly to abut against the cover and secure the filter element in position against any loss of seal with respect to the housing during operation of the filtering device.

Abstract: A disposable oil filter unit with triple filtration characterized by comprising, within a closed cup-shaped container (1), two filter cartridges (3) and (2) which filter radially from the outside towards the center and are disposed in parallel with regard to the traversing oil flow, and of which the first filter cartridge (3), which is of finer porosity, is surrounded by a third concentric cartridge (33) disposed in series with filter cartridge and having a coarser porosity than the second cartridge.

Abstract: A cell culture apparatus includes a sealed container in which a plurality of porous tubular members are positioned. The tubular members are arranged concentrically. A removable sampling bar is inserted into the innermost tubular member in the container so that the sampling bar is positioned in proximity with the inner surface of the innermost tubular member.

Abstract: A completely sealed fuel filter comprises an open mesh support and a closed tubular perforate body covering the support of a material having openings there throughout its surface sufficiently small in the micron range so as to pass fuel therethrough, but not aqueous solutions present in fuel and contaminants. The body has an outlet. A connector surrounds the outlet and is secured to the body adapted for coupling the filter to the inlet of a fuel pump. An outlet patch of a material with openings in the micron range as the body spans and covers the outlet and is peripherally secured to the body to thereby completely seal the filter.

Abstract: A filter without moving parts comprises a filter body adapted to be fitted in the flow direction into a conduit conveying a fluid to be filtered. A filter screen has a frustoconical outer filter wall with at least part of its larger diameter end inside the filter body. A collection space inside the filter body surrounds the filter screen. At least one offtake conduit is connected to this collection space. An inner filter wall of the filter screen extends at least partly into the outer filter wall from its smaller diameter end. A back wall intersects the inner filter wall and a further collection space is delimited by the inner filter wall and this back wall at the end of this inner filter wall farthest removed from the smaller diameter end of the outer filter wall. A further, separate offtake conduit is connected to the further collection space and passes substantially radially through the inner filter wall and the outer filter wall of the filter screen.

Abstract: A filter comprises a screen having a substantially conical inner wall disposed axially at its center. There is a collection space at the larger diameter end of this inner wall. A frustoconical outer wall surrounds the inner wall and has its smaller diameter end connected to the collection space. At least one offtake conduit is connected to the collection space.

Abstract: A filter device for a cardiotomy reservoir comprises multiple layers of concentric, tubular elements with a central passage for supply of blood, purified by passage through the device. A first, inner element for defoaming the blood comprises a porous sponge material within a second element comprising a depth filter medium for filtering the blood. The depth filter is surrounded by a third element of porous sponge material spacing apart the depth filter and the outer, fourth element, a fine-filter screen for removing substantially all remaining, undesirable particulate matter in the blood.

Abstract: A water filter has an elongated base with an inlet opening near one end thereof to which is secured an adaptor ring for attachment to a water faucet. A first outlet opening on the base dispenses unfiltered water and there is a channel defined within the base that leads toward the other end, with an externally-operable valve being included for selecting between unfiltered flow to that outlet and flow down the channel. Located near the other end of the base is a mounting on which sits a water filter cartridge that communicates with the channel, and the cartridge delivers filtered water to a second outlet. A number of features include a color indicator to exhibit degree of cartridge usage, a reversible adaptor ring to accommodate different faucets and there are different aerator structures. Of particular note is the replaceable cartridge which includes a deflector for obtaining better usage of the main filtering material, an exteriorally-mounted first filter and an internally-mounted second filter.

Abstract: A refillable filter-drier assembly for use in a refrigerant line. The assembly includes a shell or casing which houses a replaceable core having a central bore and which may be a filter, drier or strainer element or any combination thereof. Refrigerant enters the shell adjacent one end and occupies the space surrounding the core. The liquid passes inwardly through the core into the central bore and exits the casing from the end opposite from which it enters. The core is supported in spaced relationship with respect to the casing interior by an annular cage on the outlet end of the core and by an end closure cage on its opposite end. Both the annular cage and the end closure cage have resilient fingers which grip the core adjacent its opposite ends. Both the annular cage and the end closure cage also have pluralities of laterally extending lugs which support the core in its spaced relationship within the casing.

Abstract: A coolant filter assembly is described particularly adapted for filtering particulate matter from coolant fluid used with corrective lens grinding and edging machines. The device has a bowl-shaped housing which has an opened upper end and a lower end having a fluid outlet duct. A primary filter screen is attached across the opened end of the housing and is preferably made from stainless steel wire mesh. The central portion of the primary filter screen is covered by a coolant distribution dish which radially distributes discharged contaminated coolant fluid around the periphery of the primary filter screen. After passing through the primary filter screen, coolant material flows through a pair of concentrically arranged cylindrical particulate filters and thereafter is discharged through the outlet duct into a coolant tank. The device is easily used with existing coolant handling systems and features removable filter elements for cleaning or replacement.

Abstract: The present invention is an engine oil cleaner comprising the oil cleaner body, a corrugated porous paper board (or non-corrugated porous paper board), a polar plate, a filter cartridge, an electric conduction spring plate, several insulating rubber items and a high voltage electrostatic generator, wherein its feature lies in that the high voltage electrostatic generator is used to produce a electrostatic field between the casing body of the engine oil cleaner body and the polar plate and in this electrostatic field fully fills up the engine oil cleaner body, thus making the very small metal particles inducted and hereby possess electric charges which then are absorbed on the surface of the corrugated porous paper board, and the filter cartridge is used to filter out the smaller metal particles twice and also to eliminate the moisture and the catalysts such as the extraneous matters in the engine oil, thus preventing the engine oil from becoming deteriorated as well as extending the life of the engine oil so

Abstract: A blood defoamer for use in surgical procedures is disclosed comprising a porous defoaming element, a non-porous end piece in contact with a surface of the defoaming element, and a layer of fabric affixed to the end piece adjacent to said surface. Bypass of blood flow around the layer of fabric, which is situated downstream of the defoaming element, and accumulation of bubbles in the defoamed blood reservoir are prevented by bonding a suitably configured retaining ring to the end piece with a portion of the layer of fabric held in a fluid-tight seal between the end piece and the retaining ring.

Abstract: A method and apparatus for maintaining animal cells in vitro in a substantially arrested state of proliferation with continuous secretion of cell product is disclosed. The cells are retained within a reactor vessel chamber in a semi-rigid matrix having interstices for passage of fluid nutrient medium. Fresh nutrient medium is supplied by perfusion into the matrix through relatively low porosity tubes which are suspended in the reactor chamber and which substantially traverse the matrix; expended medium and cell product is withdrawn through relatively high porosity tubes which also are suspended in the reactor chamber and which substantially traverse the matrix; and oxygenated gaseous medium is supplied by perfusion into the matrix through a selectively-permeable membrane disposed in the reactor chamber.

Abstract: A filter, especially suitable for liquids which are difficult to filter and comprising a closed cylindrical filter container (1) having an inlet (5) for the liquid to be filtered and an outlet (7) for the filtrate and enclosing a filter unit (3) comprising one or more filter elements (13-15) which are mounted substantially concentrically inside the filter container (1). At one end, preferably the bottom end in case of vertically standing containers, the filter container has a bottom cover (2) which can be opened, and the filter element or elements (13-15) are mounted so that they can be extracted from and be retracted to the filter container (1) through said cover (2). The filter unit may comprise several filter elements (13-15) formed as separate units and mounted concentrically inside each other. The filter elements are designed so that an inner filter element over a collar (16-18) carries and is sealed against the adjacent outer filter element.

Abstract: The invention relates to a dehydrating centrifugal sieve of small overall dimensions, small weight and big yield. The sieve is appropriated for dehydration, de-sludging, enrichment and classification of mineral grains.The sieve according to the invention has in a common housing (1) several conical sieve elements (2), (12), (13) disposed successively under each other and at the same time inside each other. Between particular sieve elements there are funnels (4) terminated at the bottom with a circumferential gutter (5). The circumferential gutter (5) is connected by pipe passages (6) situated in an offtake (7) of granular concentrate through a flow-off surface (9) with an offtake (10) of clarified liquid.

Abstract: A microfiltration device for the filtration of coagula and microaggregates from blood and blood components. The device contains a filter chamber with attaching nozzle, a filter cone containing truncoconical filter elements arranged in cascade with diminishing pore size and diminishing surface area, a drip chamber and a tailpiece. The filter chamber and filter cones have different tapers and are at a specific distance apart, the taper of the filter cone from inlet to outlet being greater than the taper of the filter chamber. The filter cone has up to four filter elements, and a spacer which extends into the filter element of smallest pore size and surface area and supports same. Each of the filter elements has at least two opposed ribs running from the base to the apex of the truncated cone. The spacer is constructed such that it serves simultaneously for the support of the ribs and for the support of the filter fabric of the smallest filter element. The device has a capacity of less than 100 ml.

Abstract: A cartridge-type oil-filtering assembly comprises two coaxially nested tubular filter elements of star-shaped cross-section consisting of undulating sheet material of fine and super-fine porosity, respectively, each filter element defining an annular array of generally triangular compartments. Respective compartments of the fine and the super-fine filter element communicate with each other through the pores of the super-fine filter element as well as through individual bypasses of relatively reduced cross-section; these bypasses may be formed by channels extending within annular face plates of the cartridge or by apertures in the undulation peaks of the super-fine filter element.

Abstract: A container for air filters adapted to selectively house one or the other of at least two different primary filter elements having different diameters and different lengths, the container having a cylindrical body closed at one end by a fixed cap and closed at its opposite end by a removable cap, an air inlet in the container body and a centrally disposed air outlet in the fixed cap, the fixed cap being provided with a plurality of concentric annular sealing surfaces surrounding the air outlet, each such surface forming a seat for a different size primary filter element, centering means being provided to center each different primary filter element in the container, together with adjustable means for securing each different primary filter element in the container with its end in sealing contact with the corresponding sealing surface, provision being made for a secondary filter element.

Abstract: A filter element utilizes a perforate inner filter tube sock tightly fitted within an outer perforate support tube sock, the two socks being sealably mounted at their open ends to a tube sheet with the support tube held in tension by the pressure differential across the filter tube during operation of the associated filter.

Abstract: An assembly for treating pulp and the like in a vessel by directing an axial flow of bleaching or washing liquid or the like through the pulp, and immediately thereafter removing the spent liquid from the pulp by a straining assembly. The straining assembly includes a plurality of concentric ring-like screens having radially spaced perforated or slotted side plates, a plurality of concentric ring-like headers corresponding in number to the screens and connected to the screens in end-to-end fluid communicating relationship, and a plurality of radially extending axially reciprocal arms. Liquid passing through the screens flows through the headers and through the arms out of the vessel under the influence of pressure differential.

Abstract: A reverse osmosis cell is provided which includes a pressure vessel having pressurized fluid inlet means, concentrate fluid outlet means, and permeate fluid outlet means. A hollow, open-ended, rigid, porous, tubular member is disposed within the pressure vessel in spaced relationship to the inner surface thereof, with the spaced relationship defining an outer conduit which is in communication with the concentrate outlet. The tubular member comprises a wall delimited by inner and outer surfaces and oppositely disposed first and second wall ends, with each of the inner and outer surfaces being coated with a semi-permeable membrane, and with the inner surface defining an inner conduit. The tubular wall is provided with axially disposed wall conduit means terminating in first and second port means in the first and second wall ends, respectively.

Abstract: Apparatus for augmenting or facilitating flushing of impurities collected by a porous ferromagnetic matrix. The matrix is contained in a canister, through which an aqueous clay slurry is flowed as an applied field magnetizes the matrix to enable attraction of the discoloring magnetics. The periodic flushing of the matrix is rendered of increased efficacy, by applying auxiliary mechanical forces to dislodge the magnetics; or other disclosed means and methods may be used to facilitate the flushing operation.

Abstract: An electric oil refining apparatus for motor vehicle internal combustion engines designed to remove liquid and solid contaminants from oil which is then recycled. The oil exits from a single small orifice into a vaporization chamber where, due to sudden change of temperature and pressure, the liquid contaminants separate from the oil. The stream of oil is then deflected against a heated concave cup which vaporizes liquid contaminants, and allows oil to flow over the floor of the vaporization chamber and back to the internal combustion engine of the motor vehicle for reuse. A filter is provided at the input to the orifice, thereby avoiding clogging of the orifice.

Abstract: An improved air cleaner having a filter specially adapted for ready insertion and removal without tools, and for improvement of the seal against direct air flow between the inlet and outlet of the cleaner.

Abstract: An apparatus for thickening pulp at the bottom of a diffusion washing tower. Two sets of concentric screens are provided, each screen set comprising a plurality of radially spaced screens, the screens of one of the screen sets being radially offset from the screens of other screen sets. A plurality of hollow mounting arms each commonly mount the screen sets and are in operative fluid communication with at least some of the screens of the screen sets. Screened liquid is withdrawn from the hollow mounting arms, and the hollow mounting arms and screen sets are axially reciprocated during the screening operation. Control of the homogeneity of the pulp is effected by preventing fluid communication between the interior of screens of the different screen sets, and two separate withdrawal devices are provided, one for withdrawing liquid only from one of the screen sets, and one for withdrawing liquid only from the other of the screen sets.

Abstract: A filter for polymer melts and solutions comprises a casing having an inlet opening and an outlet opening. The casing accommodates a hollow mandrel supporting filter elements which are axially unmovable due to the provision of clamping flanges. Each element consists of a spacer plate located between filtering baffles, a sleeve having through radial passages communicating the inner space of the filter element with the inner space of the mandrel, the sleeve being mounted between the filtering baffles on the periphery of the mandrel, and a seal located between the filtering baffles on the periphery of the spacer plate. In addition, the casing accommodates auxiliary seals provided between the filter elements on the periphery of the mandrel and a spacer device arranged between the filter elements. The spacer device comprises auxiliary spacer plates each corresponding to the filtering surface of the filtering baffle. The filter is also provided with a washing device.

Abstract: A filter for blood comprising a pair of members together forming a housing with an inlet and an outlet, an aperture diaphragm between said members across the interior of said housing and dividing said housing into a filter chamber and a drip chamber respectively communicating with said inlet and outlet, means forming a hermetic and sterile seal between said members, and a plurality of filter elements serially disposed within said housing so that blood being filtered therethrough must pass in sequence through said inlet, through all of said filter elements, through the aperture of said diaphragm and then through said outlet. Preferably at least four woven nylon screens are employed as the filter elements in a nylon housing, the filter elements in the direction of flow successively having screen sizes of about 200 .mu., 50 .mu., 20 .mu. and 10 .mu..

Abstract: A filter bag pressure vessel having a filter bag that affords significantly more filter area than the conventional filter bag per equal unit area of volume displacement. The arrangement incorporates a center feed that permits a positive 360.degree. sealing of the inlet and filter bag between two parallel surfaces with a single sealing means that eliminates close tolerances and other requirements that were utilized in the prior art constructions. In addition, the filter bag and supporting structure can be adapted to fit within existing pressure vessels.

Abstract: Filtration apparatus comprising in a housing an annular filtration chamber which is supplied with a suspension under pressure. The chamber is bounded between an external and an internal surface both of them in a form of a body of revolution, at least one of them being formed as a filtering surface and in the case connected to a filtrate discharge collector. At least one of the surfaces is capable of rotating. The chamber is connected at one end to a suspension inlet and on its other end to a product outlet. The surfaces bounding the filtration chamber are arranged eccentrically relatively to one another whereby a sufficient passage for the product is left free between the surfaces even in the narrowest figure of the eccentrical profil of the filtering chamber.

Abstract: An assembly comprising a non-woven tube having fixed on its inner side a membrane for membrane filtration, and a tearing element provided in the non-woven tube. The tearing element consists preferably of a longitudinal welding joint obtained by ultrasonic welding.

Abstract: An improved method for treating liquids by disinfection and clarification which includes a means to mix and maintain consistency of the flow in a generally uniform composition prior to and during treatment. The mixture being connected to a section of conduit arranged in a pattern in a target area of a microwave generator so that all matter in the flow is exposed and excited by the electro-magnetic energy for a predetermined period of time and a control means to regulate flow of the mixture so as to allow flow only when mixture is treated, to a prescribed level. The method includes an automatic means to sense degree of treatment and to increase or decrease flow, as required, to maintain uniformity of treatment. Disposable filter means is provided when removal of undesirable contaminents is required.