Abstract: A blood collection reservoir and filter device includes a generally cylindrical housing and an internal filter medium with the filter medium being retained in spaced relationship from the side wall of the housing so that blood can pass through the filter in a non-traumatized manner and flow smoothly onto a dispersion plate for cascading delivery to the internal surface of the side wall of the housing where it can flow in a non-traumatic manner to an outlet in the bottom wall of the housing. The filter medium includes a defoaming filter layer and a particulate filter layer so that blood removed from a surgical wound can be defoamed and filtered within the device. The filter is elevated within the housing to provide a relatively large temporary storage area where blood can be retained in non-contact with the filter.

Abstract: A unit for the dehydration of sludges, particularly for purification plants including a support structure (10) supporting a vibration causing device (24), at least a collection reservoir (11) of sludges positioned above the support structure (10) and having at least one discharge outlet (12) on the bottom, at least a bag-shaped filtering container (14) having an opening engageable to the discharge outlet (12), feeding means (25) to feed the sludges into the collection reservoir (11), collecting means (23) to collect the filtered liquids from the filtering container (14), and at least a control unit (34) to control at least the feeding means (25).

Abstract: Sieve for paper pulp strainer and classifier of the kind formed by the juxtaposition of elements of U-shaped cross section comprising a perforated flat bottom (2) and two sidewalls (3) characterized in that the elements (1) of U-shaped cross section are disposed so as to form a notable cylindrical revolving wall, provided with slots or holes, whether or not associated with grooves and bars (obstacles).

Abstract: A tubular or cylindrical filter structure consists of a plurality of ring-shaped elements disposed in stacked relation by connecting rods and supporting a filtering media. The filtering media is disposed inside or outside the ring-shaped elements, depending on the direction of fluid flow therethrough. The ring-shaped elements protect the filtering media from tensile or compressive forces generated by the fluid flow, and at the same time present an open structure.

Abstract: A mobile purification apparatus for purifying oil contaminated with grit, metal particles, water and the like. The apparatus includes a strainer with a filter cartridge for removal of large contaminant particle and a filter apparatus. The filter apparatus including a heater and an upper filter element section with a plurality of filter media layers therein. The filter media layers are supported by a screen and compressed by a biasing spring. A lever is provided for off-loading compression on the filter media layers so a top of the filter apparatus can be removed to allow for cleaning and replacement of the filter media layers.

Abstract: A oil strainer device for an automatic transmission has an oil strainer with an oil suction, an oil supplying port, and an oil strainer, an opening portion formed in the transmission case, and a cover mounted on an opening portion for holding the strainer. The strainer has a meshed filter and a filter supporting plate with ribs forming lattice and is arc-shaped in cross section.

Abstract: A combined cardiotomy and venous return reservoir which combines defoamed and filtered cardiotomy blood with venous blood in a common chamber and then passes the combined blood fractions through a second defoaming element to achieve positive mixing of the blood fractions before they exit the device.

Abstract: The disclosure describes a filter assembly comprising a housing, a cover, a barrier flange, a flow tube, and a filter unit. The housing has an opening and the cover is detachably and sealingly mounted to the housing at one end of the opening. The barrier flange is detachably and sealingly mounted to the housing within the opening and has upstream and downstream sides and an aperture extending therebetween. The housing further has at least one port which communicates with the opening between the cover and the barrier flange. The flow tube has first and second ends. It is joined at the first to the cover and extends through the aperture and the barrier flange and is joined to the barrier flange. The flow tube also includes at least one orifice between the barrier flange and the cover.

Abstract: A drain pipe filter which includes a wire cage, first and second circular rims and a plurality of oil absorbing elongated fibers. The filter is placed within a drain pipe and functions to absorb oily contaminants exiting a storm drain. The first and second circular rims which are formed of a flexible material are molded integrally with the wire cage providing a water tight seal and flexibility within the environment of the drain pipe. The oil absorbing elongated fibers are adhered to the wire cage in a plurality of locations and are also adhered to an inner conical wire which is integrally formed with the second rim.

Abstract: A filter element comprising a hydrophilic organic polymeric microporous filter membrane having a preformed substantially non-porous sealing area and a filter housing having, preferably, a hydrophobic thermoplastic sealing surface in thermoplastic sealing relationship with the sealing area. Preferably, the filter membrane is a pleated cylindrical membrane and the housing includes endcaps thereto. The preferred membrane is nylon. The preferred pleated cylindrical membrane is produced from an elongated porous filtration area longitudinally bordered by substantially non-porous sealing areas. Such a membrane may be produced by a specific casting method or collapsing the pores along the longitudinal borders of the filtration area. The filter element is particularly useful for the filtration of aqueous liquids, particularly parenteral or body liquids.

Abstract: A filter element containing a hydrophilic nylon microporous filter membrane having a preformed substantially non-porous sealing area of non-porous tape heat sealed to the membrane and a filter housing having preferably a hydrophobic thermoplastic sealing surface in thermoplastic sealing relationship with the sealing area. Preferably, the filter membrane is a pleated cylindrical membrane and the housing includes endcaps thereto. The preferred pleated cylindrical membrane is produced from an elongated porous filtration area longitudinally bordered by the substantially non-porous sealing areas. Such a membrane may be produced by applying a heat sealable non-porous tape along the longitudinal borders of the filtration area. The filter element is particularly useful for the filtration of aqueous liquids, particularly parenteral or body liquids.

Abstract: A filter cartridge having an improved end cap and tube support design is taught. Briefly stated, an outer cage has circumferentially disposed thereround a plurality of truncated triangular shaped saw tooth-like projections each of which as a rounded nub or projection at the outermost truncated end. An inner cage similarly has a plurality of alternating projections coextensive therewith, with the thickness of the furthermost portion of the projection being tapered towards the bottom where the projection meets the end of the inner cage. The inner cage is disposed within the outer cage and placed between end caps having circumferential regions adapted to receive the projections disposed at the end of the outer and inner cage respectively. A filtration medium is disposed between the inner and outer cage.

Abstract: Disposable filter element, adapted for use in a high-pressure filter housing, has a plurality of layers of flexible filtering material, some layers being formed with openings through which a portion of the fluid can flow without being filtered, and at least one downstream layer of the filtering material being free from such openings. When all of the layers of filtering material have the same pore size, the total area of the openings in each layer is larger than that of the openings of any downstream layer. Each opening-containing layer of the filtering material removes part of the contaminant in the fluid. Interposed between adjacent opening-containing filtering layers is a layer of flexible transport material, and there is a layer of flexible prefiltering material positioned upstream of said filtering layers.

Abstract: A filtered waterbed filling system is provided which prevents or substantially reduces bacteria and algae growth in stagnant, heated water contained in a waterbed. The filling system may be a one-piece filling probe, or a universal hose coupling assembly may be provided which is mateable with either a separate filtered filling probe for filling the waterbed, or a separate drain probe for emptying water from the waterbed. The filtered filling probe employs a filter material formed in a cylinder shape and which extends a length of the probe and which is embedded in an outer supporting matrix. A pore size of the filter material prevents passage of at least some bacteria or other contaminants so as to aid in the prevention of bacteria and algae growth within the water mattress and/or to aid in reducing deterioration of the water mattress and/or inserts associated with the mattress. With the system disclosed, the use of a chemical solution to control bacteria growth is substantially reduced or eliminated.

Abstract: A tubular filter element for liquid filters comprises a perforated support pipe. Disposed around the inside of the support pipe is a tubular filter layer which comprises a folded sheet of filter material. Within each end of the filter element a spring washer is disposed for biasing the end of the tubular filter layer outwardly against the inside of the support pipe. In this pre-biased state, the ends of the filter element are joined to disks by means of a hardenable casting material.

Abstract: A fuel filter for installation within a fuel tank comprises a main filter element for removing foreign matter and an auxiliary filter element consisting of a metal net covering the main filter element. The metal auxiliary filter element protects the main filter element against any spattering or molten metal that may occur during assembly of the fuel tank by means of a welding process of the like.

Abstract: The disclosure described a pressurized fluid container comprising a fluid vessel, a sheath arrangement which may be fitted around the fluid vessel, and a mechanism for tightening the sheath around the fluid vessel. The disclosure also describes a filter assembly comprising a filter cartridge and sheath arrangement for supporting the filter cartridge against the pressure of a fluid flowing through the filter cartridge. The filter cartridge comprises an impervious shell, two end caps, and a porous filter unit. The shell has first and second ends, and the first and second end caps are respectively mounted at or near the first and second ends of the shell. At least one of the end caps may be slid along the shell and engages the shell to form a seal. The porous filter unit is positioned within the shell and has a first surface and a second surface.

Abstract: A filter element constructed of stainless steel. The element includes a pair of filter media concentrically disposed to receive parallel flow of the filtrant. The element is adapted for disassembly to remove the filter media. The various component parts of the filter element may thereafter be easily cleaned and the filter media replaced. The filter media after being removed may also be cleaned and reused if desired. The component parts include appropriate guard assemblies to protect the filter media during handling and use.

Abstract: The present invention provides a filter apparatus having a filter vessel into which liquid to be filtered is inlet near the bottom of the vessel. The liquid rises in the vessel and is forced through a filter screen running the height of the vessel. After flowing through the filter screen, the filtered liquid enters an annular enclosure outside the filter screen. The filtered liquid rises in the enclosure to the height of a discharge outlet near the top of the enclosure wall. This assures the even depositing of solids filtered from the liquid along the entire height of the filter screen.

Abstract: A pressure filter apparatus with media mounting assemblies is provided. The pressure filter tank is generally cylindrical with a cylindrical inner wall having a filter screen therein. A filter media is mounted on the inner wall with seal assemblies above and below the filter screen. Each seal assembly includes a spacer rod and bar continuously welded to the inner wall of the filter and a resilient ring mounted thereon. Each upper and lower edge of the media is sewn to the resilient ring to form a seal therewith.

Abstract: The present invention provides a liquid filtering apparatus wherein solids suspended in the liquid are accummlated to form a cake on the filter media as the liquid passes through the media. Upon the buildup of such solids, pressurization upon the liquid forces remaining liquid through the media. Such pressurization is inactivated upon excessive cake buildup, and a conduit helically wound about the outside of the filter media is expanded by air pressure. The conduit is attached at various points about its length so that it forms chord lines between such connection points. Such expansion and chording of the conduit breaks the cake from the media.

Abstract: A composite is provided which has improved transverse structural integrity and flexibility and suitable for use in high temperature and high stress environments. The composite has randomly oriented high temperature resistant inorganic fibers interlocked together into a shape sustaining paper with a transverse thickness of from about 0.005 to 0.5 inch. A transverse strength providing high temperature resistant, flexible fabric, made of inorganic fibers is disposed upon at least one of the surfaces of said paper. An organic adhesive is disposed between the paper and the fabric and flexibly bonds the paper to the fabric to form a composite. The composite is sufficiently flexible that it may be folded or pleated without breaking and is capable of being used at high temperatures and at high transverse stresses without rupturing.

Abstract: A filter device for an in-tank type fuel pump for a vehicle, which comprises a pump holder coupled to a lower end portion of an in-tank type fuel pump having an inlet, and a filter housing coupled to the lower end of the pump holder and having at least one filter window which is closed by a filter element for filtering fuel taken in by the pump, and a suction pipe provided between the bottom of the pump holder and filter housing, extending into the filter housing and having a lower open end in the neighborhood of the suction pipe being substantially parallel to the bottom of the fuel tank.

Abstract: A fuel tank filter connected to and submerged in the tank at the end of the supply line that is particularly effective for outside fuel tanks including an inlet tube extending towards the bottom of the tank having a plurality of inlet holes proximate to the end of the tube, a fibrous filter surrounding the inlet tube, a cup surrounding the fibrous filter and the inlet tube preventing flow except over the top edge of the cup at the height of at least three inches from the bottom of the filter and a fine wire mesh covering the fibrous filter.

Abstract: A filter device for use in a fuel tank, has a filter body having an upper wall and a lower wall, a guide portion extending through the filter body and having an intake hole at a lower portion of the guide portion near the bottom wall of the filter body, a suction pipe having a lower portion which is inserted into the guide portion, and spring means provided between the suction pipe and the filter body for biasing the filter body toward the bottom wall of the tank body.

Abstract: A sewage sludge filtering system adapted for use with a polymer mixer for mixing a liquid polymer with sludge to produce an output mixture comprising coagulated sludge particles and water which comprises an elongated mesh hammock, a support arrangement for supporting the hammock in a generally horizontal orientation, and a piping system for communicating the output mixture to the interior of the hammock whereby the coagulated sludge particles are retained in the hammock and gradually dried as water escapes through the mesh of the hammock. An elongated filtrate tray is disposed under the mesh hammock for collecting filtrate and returning it to a sewage treatment facility.

Abstract: A molten metals filter apparatus having a hollow frusto-conical strainer, including an inlet port and a plurality of slot apertures having a uniform width for selectively restraining particulant impurities in molten metals.

Abstract: Screen cage for pressure sorters, with which, in order to increase the stability of the screen cage wall and the sum total of the inside screen cage apertures, the screen cage wall has a regular pattern of cylindrical recesses on its outlet side and grooves extending parallel to each other on its inflow side, the grooves and the recesses together forming screen aperture slots.

Abstract: This invention comprehends a new and unique means for preventing the crowns (forward projections of the pleats) of a backflushable filter element from splitting due to the cyclic action that is experienced during cleaning and backflushing. In one embodiment, a plurality of spacers, preferably wedge shape, is positioned between the outwardly projecting pleats of the filter media thereby preventing the splitting thereof. A plurality of spacers may also be placed between the inwardly projecting pleats to provide additional support during the cleaning and backflushing cycle. In another embodiment a ring is placed adjacent the inwardly directed pleats and the inner end cap lip; this also prevents splitting of the crowns when the filter element is subjected to the cyclic action of cleaning and backflushing.

Abstract: A filtration and extraction apparatus comprises a housing, a plurality of cages disposed in a passage of said housing, compressible filtration and extraction mechanisms which are disposable in each cage and mechanisms for simultaneously positioning said cages within the passage and compressing at least a portion of the filtration and extraction mechanisms so as to prevent the channeling of fluid around said filtration and extraction mechanisms.

Abstract: A differential pressure valve is proposed for a fuel injection system of an internal combustion engine. The differential pressure valve includes a diaphragm embodied as the movable valve element, which separates two chambers from one another. A fuel supply line discharges into one chamber and a valve seat carrier provided with a valve opening protrudes into this chamber. This chamber also houses a filter element and a valve spring is disposed coaxially with the valve seat carrier between upper and lower spring plates. The filter element is disposed such that a subsequent change in the tension of the valve spring is also possible. To this end, the filter element can engage the upper spring plate on one side in a sealing manner and on the other side can be supported in a sealing manner in a groove of the wall of the chamber (FIG. 1). In order to assure the free mobility of the filter element, it is provided with an elastically deformable area. As shown in FIG.

Abstract: A backwashable filter comprises a generally cylindrical housing with an inlet and an outlet, a cylindrical filter basket located within the housing between the inlet and the outlet, and a backwashing arm bearing against the inside face of the filter basket and arranged to rotate about the axis of the filter basket. The filter basket is formed by an inner and outer perforated cage with a filter medium interposed between them. The outer surface of the inner cage is configured to provide channelling between the inner cage and the filter medium to allow liquid to be filtered to contact substantially all of the inner surface of the filter medium. Direct flow of liquid to be filtered from the inside of the inner cage into the backwashing arm along the channelling is prevented by arranging the channelling axially or by arranging the channelling in the circumferential direction and then providing a wide shoe on the backwashing arm.

Abstract: A backwashable filter includes a generally cylindrical housing, an inlet opening into the housing and an outlet opening from the housing, a cylindrical filter basket within the housing and arranged between the inlet and the outlet openings, and a backwashing arm bearing against the inside of the filter basket and being rotatable around the inside face of the filter basket. The filter basket comprises a perforated core a filter medium wrapped around the perforated core and a perforated flexible outer clamping band wrapped around the outside of the filter medium with tensioning means to apply tension to the clamping band to clamp the filter medium tightly against the perforated core. This clamping band constrains the filter medium and so prevents it flexing with rotation of the backwashing arm and this enhances its life.

Abstract: An improved filter element for fluid circulating system having unpressurized reservoirs and primarily adapted for removing algae and other fine contaminants from swimming pool water comprising pleated filtration medium arranged in a cylindrical configuration having an open central area, a cap bonded to one end of the filtration medium to close the open central area, an adapter bonded to the opposite end of the filtration medium for connection to a flow source to direct the flow of water into the open central area for passage through the filtration medium in a direction from inside to outside and an outer support member disposed on the exterior of the filtration medium and closed at one end and secured at the other end to the adaptor to restrain the filtration medium.

Abstract: A plurality of separate V-shaped wire mesh members are arranged and connected in side-by-side relationship to provide a plurality of V-shaped cells across an air stream. A W-shaped retainer or connector formed of perforated sheet metal has outer, downstream facing trackways which receive side edges of the wire mesh members, and a central, upstream facing trackway which receives and retains the free edges of V-shaped filter media bags which are inserted into the V-shaped cells overlying the wire mesh. A stabilizer bar extends across and attaches to the exposed adjoining edges of the V-cells to support the cells in proper relation and retain the filter media in place.

Abstract: A coffee filter for coffee pots comprising a container, and a filtering element is disclosed. The container comprises a bottom surface having a plurality of openings and a lateral surface extending from the bottom surface around the periphery of the bottom surface. A plurality of axial ribs are connected to the inside of the lateral surface. The axial ribs are spaced equidistantly about the inside of the lateral surface. Each of these ribs has an inclined edge surface such that the surface defined by the inclined edges of the axial ribs is in the shape of an inverted truncated cone. The bottom edges of the axial ribs terminate in a supporting ramp which is a radial projection extending from the inclined edge of each axial rib. The filtering element is supported, and rests upon, the supporting ramp.

Abstract: Apparatus to separate a mixture of liquids of different specific gravities, e.g. oil and water, said apparatus having in a closed vessel a separation space with means for controlling the discharge of lighter liquid therefrom and a multiple filter provided beneath said separation space and consisting of a series of filtering cloths separated from one another by intermediate chambers, the upper wall of each intermediate chamber being provided with passages opening into the lower region of the separation space and controllable by valve means.The invention relates to an apparatus for the separation of a mixture of liquids of different specific gravities, e.g.

Abstract: A filter unit for filtering lint from liquid washing machine effluent. The unit comprises a semi-rigid frame, preferably molded in plastic and consisting of a horizontal top rim, vertically depending frame elements, horizontally disposed bottom frame elements or portions thereof, and a mounting bracket which seats on one wall of a wash tub. A filter screen is mounted within the frame. The screen is a plastic mesh and forms closed sides and a bottom with an open mouth. A removable cap seats over the mouth and a washing machine drain hose extends through an aperture of predetermined size and shape into the screen within the frame.

Abstract: A cell for coalescing oil droplets dispersed in a water emulsion including a perforated core into which the emulsion is injected, a layer of emulsion breaking fibrous material wound about the core through which the emulsion passes, and a helical wire wrapping on the outside of said fibrous material. The wire wrapping is of selected tension and spacing.