Abstract: Disclosed herein are improvements to a water filtration system on a water intake line that prevent the infestation of Zebra Mussels in the water system. The water filtration system filters any water entering the water intake line through a filter having a largest pore size that is small enough to prevent the passage of an eggs or veliger of Zebra Mussels. To prevent accumulation of Zebra Mussels on the filters and the filtration unit, copper screens surround the filters and the water intake to the filtration system. The filters are also provided with threaded ends to facilitate easy and reliable removal and replacement of the filters when needed.

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: The system consists of a buffer reservoir, which is filled by gravity through a recuperation line which connects domestic appliances producing grey water, like the bathtub, the shower, the washing machine, etc. A multiple concentric elements is integrated in the reservoir and a pump draws the water from the center element of the filter for forwarding to a toilet reservoir, when the latter needs to be filled. The water filter allows the successive retention of finer and finer particles, throws them through a porous top of the filter by using the hydraulic pressure inside the filter to decompose and recirculate debris in and out of the filter while reducing at the same time the accumulation of waste in the reservoir and the frequency of cleanings.

Abstract: A porous coalescing filter element of conical configuration is diposed within a substantially cylindrical filter housing such tha the area between the element and the wall increases in the direction of the primary phase flow to keep the annular velocity substantially constant or decreasing in the direction of primary fluid flow. The element may be manufactured with a round end and tapered walls terminating to a pointed apex, but is more preferably manufactured and secured within the filter housing using flat end caps on both ends. The filter element may be vacuumed formed, or manufactured from media in a flat sheet form, which may be pleated if desired.

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 portable, manually-operated water filtration pump for purifying water. The pump includes an inexpensive, disposable filter cartridge which can be easily changed when the filter elements are no longer effective. The pump uses a lever to actuate a double-acting piston. The lever is collapsible to one side of the pump for compact storage. The filter cartridge is a tubular cylinder having an inner bore forming the pump cylinder. A cylindrical mechanical filter is concentric with and adjacent to the inner bore to filter out particulates larger than 0.3 microns. A fluidized granular activated charcoal filter surrounds the mechanical filter to absorb chlorine and chlorine-related compounds such as herbicides and pesticides. The pump pumps into a bottle adaptor which will fit most standard water containers. A prefilter is provided to screen out large particulates from the pump to enhance the life of the filter elements.

Abstract: A discharge purification system for dry cleaning facilities is disclosed. The system comprises a series of concentric tanks providing settling and filtration treatment for water containing dry cleaning solvents. The device also provides for recycling solvent back to the dry cleaning facility.

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: A device for taking up fluids likely to foam, especially emulsions, with a suction system having a suction pipe through which the fluid is taken up at one end, the suction pipe having an aperture at the end thereof, and a first container attached at the one end of the suction pipe, the container of which opens upwards in the operative position of the device which is so arranged that, in the operative position, only the fluid inside the container may be taken up by the suction pipe, the container having at least one aperture in its wall that lies, in the operative position, partly beneath the fluid surface, and with a float for positioning an edge of the container, in the operative position, above the fluid surface, in which there is a second external container surrounding the first container which also opens upwards in the operative position of the device and is so arranged that, in the operative position, only the fluid inside the outer container flows into the inner container and which has in its wall at le

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 present invention relates to an oil filter (1) for internal combustion engines, which is preferably used in secondary oil circuit in addition to a conventional oil filter. The oil filter comprises a filter housing (2a, 2b, 3o, 3u) in which a filter element (5) that consists of a roll of absorbant paper that is wound about a rod (4) is installed. In order to simplify production and inventory management, the present invention proposes that the oil filter be configured as a set of elements that comprises the body sections (2a, 2b) and caps (3o, 3u) and a rod (4) with the rolled filter element (5). The volume of the oil filter can be matched to a particular application by connecting a plurality of body sections (2a, 2b) with an appropriate number of rods (4).

Abstract: The disclosure describes a filter device which comprises at least an outer and an inner hollow filter element, each having first and second ends. A first end cap is sealed to the first end of the inner filter element. A second end cap is sealed to the second ends of the outer and inner filter elements wherein the inner filter element is disposed inside and spaced from the outer filter element. The inner filter element can be tapered and can be shorter than the outer filter element. The filter device may further comprise additional filter elements.

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 rotary self-cleaning strainer comprises a circular cylindrical walled pipe on which a circular cylindrical filter screen assembly is journaled for rotation. The pipe has an intake that is surrounded by the filter screen assembly and a discharge that is connected to a pump. When the strainer is placed in a body of water that is to be pumped, water is drawn through the screen that forms the sidewall of the filter screen assembly and enters the intake of the pipe. The filtered water is conducted through the PVC pipe and to the pump. Two sets of nozzles disposed within the filter screen assembly are supplied with return water through a supply line tapped into the pump outlet. The water is forcefully emitted against the screen to both rotate the screen assembly and dislodge adhering debris from the exterior of the screen. Each set of nozzles is 180 degrees from the other so that each acts upon a limited zone of the screen.

Abstract: A liquid filter comprising a casing having a feed pipe, at least a drain pipe and at least a flushing pipe respectively fastened at different level positions, at least a circular filter and at least a rotary wire brush device. Feeding liquid which is pumped through the feed pipe along the inner wall into the casing is induced by the drain pipe and stirred by the wire brush device to rotate inside the casing permitting the mid-stream of the rotating liquid to penetrate through the circular filter. The filter has a smooth, elastic, convex outer surface which prevents fibrous or other debris from attaching thereto, form mid-stream osmosis filtration effect under straining rotation fluid at constant flowing pressure.

Abstract: A filter system containing, in series, a first filter media having a chemically active filter media, a physically active filter media, or mixtures thereof and a second filter media having an inactive filter media can effectively rejuvenate used lubricating oils. In a preferred embodiment, the chemically or physically active filter media will be within a cannister that is separate from a container having both active and inactive filter media.

Abstract: Process and apparatus for the separation of mixtures of substances by means of centrifugal forces, particularly for the filtration and/or sedimentation of solids from suspensions, wherein the material mixture is rotated in a cake-forming chamber until a cake of solid particles is formed. The resulting cake may thereafter be washed with a wash liquid, centrifuged and discharged from the cake-forming chamber. Discharge from the cake-forming chamber results in rearrangement of the solid particles of the cake. The cake of the rearranged particles is transferred to at least one further processing chamber and dried by centrifugation before being discharged from the apparatus.

Abstract: Microaggregate blood filter adapted to pre-filter aggregates larger than 150 microns without interfering with the on-going and continuous filtration of aggregates between 40 and 150 microns. Filter comprises a flexible housing having inlet and outlet ports and an interior nest of two generally cylindrical concentric outer and inner filter screens with a space between the screens. Blood to be filtered enters the housing from the top and is pre-filtered for aggregates larger than 150 microns by the inner screen. The inner screen defines a relatively large interior volume which allows filtered aggregates to collect by sedimentation at its lower portions in a manner that permits on-going, continuous, and unobstructed filtration of the blood through its upper portion for subsequent and final filtration through the outer 40 micron filter. A preferred filter has a transparent housing and built in drip chamber and can be primed without inverting the filter.

Abstract: In an integral filter (F) for separating fluid components which filter can be enclosed in a surrounding housing (1,2) with fluid connections (A1 l to A3, 10) the permeable tube jacket of which filter consists of several tubular filter elements (K1, K2) with different filter qualities whose cross sections are stepped in such a manner that a smaller filter element is surrounded by a larger filter element, optionally with formation of an intermediary space (Z1), and in which the two tube ends are enclosed by closure and connection adapters (15, 20, 21, 22, 27, 31) and can be adapted to fluid chambers (13, 14) of the housing, sections of the total filter (F) can be selectively tested for integrity, supplied with and emptied of fluid and filling substances via an intermediary space (Z1) between two filter elements (K1, K2) which intermediary space can be separately controlled and loaded from the outside.

Abstract: A process for removing by coalescence condensation water from large quantities of lubricating oil of a steam driven turbine a significant portion of which water is in the form of an oil/water emulsion. The process is capable of reducing the free and emulsified water content of lubricating oil having a viscosity rating of 150 ssu at 100.degree. F. from 5000 ppm to 25 ppm in a single pass through the unit at a flow rate of 100 gallons per minute with most of the water in the oil as received by the equipment being in emulsion.

Abstract: An apparatus for removing foreign matter from a solution of paint or the like. The apparatus includes a vacuous vessel for receiving the paint solution which has been strained; a straining assembly which has a main body mounted in fluid communication with the vacuous vessel; and a plurality of removable filter elements positioned internally of the main body and operable selectively to remove foreign matter from the solution of paint which is passed therethrough.

Abstract: A process and device for the selective separation of pathological and/or toxic species from blood, plasma or serum wherein a plasma or serum fraction is passed through a container containing one or more filter candles of decreasing means pore diameter and which may contain a sterilizable spacing disc between the filter candles. In accordance with the invention, macromolecular pathological and/or toxic species with molecular weight exclusion limits between about 20,000 and 3,000,000 D may be selectively separated from a fraction of plasma or serum.

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 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: An apparatus for removing debris and other foreign matter from a solution of paint and the like, the apparatus having a vacuous vessel for receiving the paint solution which has been strained; a straining assembly which has a main body mounted in fluid-flow communication with the vacuous vessel; and a plurality of removable filter elements are positioned internally of the main body and which are adapted, selectively, to remove any debris or other foregin matter from the solution of paint which is passed therethrough.

Abstract: The filtering column is of the type comprising a perforated hollow metal tubular body (11) around which is disposed a stack (20) of metal rings (27) having deformations forming spacing elements and defining therebetween filtering interstices. The rings (27) have an inside diameter exceeding the outside diameter of the tubular body (11) so as to define between the inner periphery of each ring and the outer periphery of the tubular body a limited radial clearance (26) which does not exceed the elastic limit of each individual ring. The rings (27) constitute a stack (20) retained axially on the hollow body (11) in an undetachable manner with an axial clearance exceeding the aforementioned radial clearance.

Abstract: A renewable, multi-layered filter apparatus (20) is disclosed. The filter apparatus (20) includes a housing (22) having a fluid inlet (24) for ingress of a contaminated fluid flow and a fluid outlet (26) for egress of a filtered fluid flow. A filter element (28) is supported intermediate of the fluid inlet (24) and the fluid outlet (26). The filter element (28) includes a nested, pleated filter media (30) having multiple filter media layers (30a,b,c) which are independently removable from the filter element (28) so as to enable renewal of the filter function by simply removing one of the filter layers (30a,b,c).

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 compact water purifier is described in which three filters are contained within a single container. The first filter in the sequence is a pre-filter designed to remove large particles from the flow stream, the second an activated carbon filter for the adsorption of toxic chemicals, and the third a ceramic microscreen, preferably containing silver or other bacteriostatic agent. The three filters are assembled within a cylindrical container which is sealed to the filter assembly at each end so that a substantially uniform inward flow pattern and stable flow rate are established, and so that the relative volumes of the carbon and ceramic materials are appropriate for their functions, and so that each filter medium is assured to retain its proper position within the prescribed filtering sequence.

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 juice extraction apparatus comprising a generally vertically extending structure having side walls defining a generally vertically extending enclosed space, a vertical passage extending through said space, at least a portion of said passage being defined by a screen so juice from crushed fruit located in said passage may drain therethrough, means to duct extracted juice from within said space, and means to regulate the flow of the crushed fruit through said passage.

Abstract: A filter device for use in a pipeline flow system used in particular, but not essentially in milking installations comprises a filter housing (4,5) containing a plurality of filter elements (1a,1b,1c etc) of decreasing size in the flow direction for successively filtering and particles of decreasing size. Each filter element comprises a first filter mesh (1) and a second and coarser filter mesh (2) serving a support mesh positioned on the downstream side of each filter element. The support meshes are all coarser than the coarsest filter mesh. Such an arrangement is readily dismantable for cleaning, is resistant to the usual pressures in pipeline flow systems so that filter meshes as fine as 50.mu. do not rupture and permits a high liquid throughput especially when woven plastics filament meshes are employed.

Abstract: An air cleaner which includes a support (23) having a first concave conical surface (26) and compression means (50) extending along the axis of said surface away from the apex of said surface; an hollow inner filter (37) including a first end cap (41) with a rim (43) defining a first convex conical surface having the same apex angle as said first concave surface, and a second end cap (42) for axial engagement by said compression means; and a hollow, outer filter (32) including an end cap (57) with a resilient lip (61) extending inwardly to be sealingly received between said conical surfaces when said compression means engages said second end cap. The second end cap of the inner filter may have a second convex conical surface (47), and the outer filter may have a second end cap with a resilient lip extending to be sealingly engaged by the second convex conical surface.

Abstract: A pressurized screening device has two pairs of concentric cylindrical screenplates, one pair mounted coaxially above the other in a common housing. Each pair of screenplates has a separate rotary impeller mechanism, the impellers being mirror images of each other. The pair of screenplates share a common central feed chamber, common accepts chamber, and a common drive for the two rotary impellers. Each pair of screenplates is provided with a separate rejects collection chamber, one located at the base of the housing and the other located near the top of the housing. This arrangement permits both high capacity operation as well as efficient removal of heavy and light impurities from a feed stream.

Abstract: A diffusion washer and/or thickener assembly is provided that is greatly simplified. A number of withdrawal screens and fluid introducing structures are provided supported by spider arms which comprise conduits for introduction of liquid into and withdrawal of liquid from an elongated upright hollow vessel in which the assembly is disposed. The conduit means, with attached screen structures, is reciprocated up and down by a single linear actuator located preferably above the vessel and within the cross-sectional area thereof so that the wall of the vessel need not be penetrated by the conduits. The screens and fluid introducing structures remain stationary with respect to each other during reciprocation. A number of wiper blades, which may be operated by a single linear actuator, are provided at the top of the vessel for moving upwardly flowing pulp into withdrawal conduits surrounding the vessel periphery.

Abstract: A water filter, in particular for aquarium water, comprises a filter chamber having a water inlet and a water outlet and being filled with exchangable filter material, as well as a boost pump arranged downstream of the water outlet. The filter chamber is defined by an annular space between two concentric tubes of different diameters, the outer tube having as water inlet a perforation arranged spaced around its entire circumference and its entire length and the inner tube likewise being provided with a perforation around its entire circumference and its entire length. At one end of the inner tube, a water outlet line is connected, while the other end of the inner tube is closed. With this structure, the entire filter material employed may be completely utilized, and also, the exchanging of the filter material is simpler.

Abstract: A filter assembly comprises a plurality of filter elements telescopically mounted relative to each other and in a housing defining an inlet and an outlet thereon. Each filter element comprises a tubular screen having a plurality of longitudinally extending ribs secured in circumferentially spaced relationship therearound. First and second filter elements of each radially adjacent pair of filter elements have the ribs thereof aligned in abutting relationship to space the screens of the filter elements radially from each other to define a flow passage therebetween. The screen of the outermost filter element is cylindrical, the screen of the next radially adjacent filter element is frustoconically shaped and et sequence to closely compact the filter elements together. An end cap is secured on one end of the filter assembly to retain it in place in the housing.

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: Method of and apparatus for separation of solids from a liquid employs an elastic sheet filter which has pores of diameter larger than an average diameter of the solid and smaller than the maximum diameter thereof. The liquid is filtered under pressure by a filtered residue layer developed on the sheet filter. Then liquid is rapidly introduced to the sheet filter portion from the reverse direction to liquid flow occured during the filtration of the liquid so that the sheet filter and filtered residue layer pressed during the filtration is rapidly pressed in the reverse direction, whereby the filtered residue layer is flaked out in the liquid and separated therefrom.

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 filtration assembly useful in a household water-chilling system and having a filter with concentric cylindrical activated-charcoal elements supported between inner and outer porous plastic tubes. The filter is contained in a housing having a cover with radiused inlet and outlet ports. A coupling or adapter block having captive O-rings seals mates with the cover ports to conduct water through the filter. The block and cover are self aligning, and are positioned so no vertical clearance space is required to separate the filtration assembly from the block when the filter is serviced.