Abstract: A filter device inserts into a duct having flow passing from upstream to downstream. The filter device includes fluted filter media having flutes formed therein. The filter forms a seal between the outer edge of the filter and the downstream side of the duct. The filter media may be rolled or stacked in layers to match the shape of the duct.

Abstract: A fluid filter arrangement including layered filter media capable of successively filtering varying sized particulate matter from a treated fluid stream with each layer of the layered filter media having a substantially equal terminal pressure drop thereacross.

Abstract: A filter composite comprising a first layer of glass fibers having random orientation, the layer being porous to gas flow therethrough; a porous mat of sufficient stiffness as to support the glass fiber layer during use as a filter, the mat consisting of compacted glass fibers, and; an additional porous layer carried by the mat to block escape of glass fibers or particles from the filter composite during gas flow therethrough. The first layer fibers have diameters between about 0.000035 and 0.00015 inch.

Abstract: A paint arrestor for absorbing paint overspray comprises a series of layers of sheet material, each of the layers being slit and expanded to define an array of air spaces distributed in columns. The air spaces alternate in size from column to column and repeat in size in every other column. Means are provided for securing the layers in contiguous, overlying relationship with one another.

Abstract: Disclosed are novel composite fibrous structures which have utility as filters. These composite structures have at least two layers. The first layer is a nonwoven fibrous structure made from uniquely grooved fibers. The second layer is of a fibrous material that offers high filter efficiency.. The first layer has significantly lower pressure drop and higher dust holding capacity than the second layer.

Abstract: A filter composite comprising a first layer of glass fibers having random orientation, the layer being porous to gas flow therethrough; a porous mat of sufficient stiffness as to support the glass fiber layer during use as a filter, the mat consisting of compacted glass fibers, and; an additional porous layer carried by the mat to block escape of glass fibers or particles from the filter composite during gas flow therethrough.

Abstract: A double cylinder shaped multilayer structural member comprising ring shaped thin plate small diameter discs and large diameter discs respectively layered via spacers is disposed in the enclosure vessel of a trap device for a vapor phase reaction apparatus. Gas from the intake opening section of the enclosure vessel is introduced into the outer side space of the multilayer structural member of the enclosure vessel, passes through the spaces between the large diameter discs and also passes through the spaces between the small diameter discs, then exits via the inner side space of the multilayer structural member from the outlet opening section of enclosure vessel to the system exterior. As a result of this construction, in comparison to conventional devices, the collection efficiency of reactive components can be increased, the equipment life extended, and maintenance frequency reduced, thereby providing a trap device for a vapor phase reaction apparatus capable of improving productivity.

Abstract: A filter system for filtering the air intake of an internal combustion engine including a housing having a bottom half and a cover half, at least two filter inserts each consisting of pleated filter paper or filter batting, and a circumferential gasket. The two filter inserts are connected by a junction strip which simultaneously seals the raw air chamber from the clean air chamber between the two filter inserts.

Abstract: A filter cover for an air cleaner assembly of an internal combustion engine. The filtering cover is composed substantially of filtering material which filters air as the air is drawn through the filtering cover and into the air cleaner assembly. The filtering cover greatly increases the air filtering surface area of an air cleaner assembly resulting in improved performance and operation of the engine.

Abstract: A defoaming device for separating foam and bubbles from a liquid, such as blood, is disclosed. The device can be used in conjunction with a medical device, such as a membrane oxygenator, for separating air from blood while minimizing blood contact with the antifoam agent used in the device. In a first embodiment, the device includes a reservoir and a filtering material that does not contain any antifoaming agent. This filtering material is positioned in a lower portion of the reservoir to separate foam and bubbles from the liquid. An element containing an antifoaming agent is positioned in the reservoir above the maximum surface fluid level therein and receives the foam and bubbles that rise from the filtering material. Contact of the liquid with the antifoaming agent is substantially avoided. In a second embodiment, an element containing an antifoaming agent is positioned in the reservoir within the fluid therein.

Abstract: An exhaust gas cleaning device is constructed of a honeycomb core body. The honeycomb core body has been formed by superposing a planar band made of a metal sheet and a corrugated band made from another metal sheet one over the other in a contiguous relationship and then rolling the thus-superposed bands into a multi-layered spiral form. The honeycomb core body defines a number of network-patterned axial gas flow passages and is adapted to carry an exhaust gas cleaning catalyst. The honeycomb core body is divided into a central honeycomb core section of a smaller diameter and an outer honeycomb core section of a larger diameter. A separator is interposed between an outer peripheral wall of the central honeycomb core section and an inner peripheral wall of the outer honeycomb core section. The outer honeycomb core section may be divided further into plural honeycomb core sub-sections having different diameters and a additional separator may be interposed between each two adjacent core sub-sections.

Abstract: An exhaust gas cleaning device is constructed of a honeycomb core body. The honeycomb core body is formed by superposing a planar band made of a metal sheet and a corrugated band made from another metal sheet, one over the other in a contiguous relationship, and then rolling the thus-superposed planar band and corrugated band together into a multilayered spiral form, defines a number of network-patterned axial gas flow passages, and is further processed to carry an exhaust gas cleaning catalyst thereon. The honeycomb core body defines, along the central axis of rolling thereof, an open cylindrical hollow space of a diameter .phi..sub.2 satisfying the following formula: ##EQU1## wherein .phi..sub.1 is the outer diameter of the honeycomb core body, and.phi..sub.2 is the outer diameter of the cylindrical hollow space.In other aspects of the invention, reinforcing cylinders or ribs are disposed to strengthen the overall structure.

Abstract: A snap-on filter for chemical cartridges is presented which includes a filter element comprising a perforated fiberglass prefilter bonded to a felt filter. The filter element is contained within a filter housing which snaps onto the chemical cartridge of a standard gas mask. The fiberglass prefilter is perforated to provide a passage way for fumes into the interior of the filter as well as the filter surface. The perforations increase the overall surface area of the prefilter for filtration. This feature enhances the efficiency and overall life of the filter element.

Abstract: A cartridge-type liquid-gas separator having particular use for separating oil from air. The separator includes an outer casing containing an annular pleated first stage filter element and an annular second stage element located concentrically of the first stage element. The first stage filter element is composed of a coalescer section formed of unwoven fibrous material and a disloader section disposed downstream of the coalescer section and composed of multiple layers of fibrous material impregnated with a resin having low surface energy. The first stage element can also include a pair of screens, one located upstream of the coalescer section and a second located downstream of the disloader section. The second stage which is spaced downstream from the first stage is composed of a fibrous stripper layer followed by a screen.

Abstract: The present invention relates to a filter element suitable for the purification of gas, in which spaces are constituted with porous spacer between plural membrane filters. Particles or dusts captured in the filter element of the present invention are prevented from rescattering under the impulsive pressure at the initiation or termination of the filtration, so that the high precision of the filtration can be achieved.

Abstract: An adsorptive fiber sheet where a nonwoven fabric of synthetic fiber constituted only by synthetic fiber having a higher melting temperature is secured in a layered structure to at least one surface of a nonwoven fabric of adsorptive fiber which is produced in such a manner that synthetic fiber having a higher melting temperature, synthetic fiber having a lower melting temperature and adsorptive fiber are mixed with one another and contact points between the synthetic fiber having a lower melting temperature and other fibers are bound together by softening the synthetic fiber having a lower melting temperature. Both the synthetic fabrics are placed one above another in a layered structure by allowing synthetic fiber having a lower melting temperature to be softened to bind or by allowing fibers to be entangled with one another in such a manner that no separation takes place therebetween.

Abstract: The filter element of the present has a plurality of wavy portions which are so arranged that a plurality of wavy portions make a generally ring like structure. In order to reduce the pressure drop when the fluid flows through the filter element, the present filter element has a special shaped radial gaps. Namely, the width of a first radial gaps, which is formed within adjacent wavy portions and which connects with an inner space formed at the center of the generally ring like structure, increases from the outer end thereof to the inner end thereof. The width of a second radial gap, which is connected with outer atmosphere, decreases from the outer end thereof to the inner end thereof. Both axial ends of the wavy portions are covered with the adhesive sheet on which adhesive layer is cladded.

Abstract: A cylindrical radial flow type dust collector filter for filtering the fluid flowing in the radial direction thereof is disclosed. The filter is composed of a cylindrical first filter member having a zigzag-shaped cross section in the flowing direction of the fluid, a second filter member having flowing resistance smaller than that of the first filter member, which is arranged outside of the first filter member so as to cover the outer periphery thereof and a third filter member having flowing resistance substantially the same as that of the second filter member, which is arranged inside of the first filter member so as to cover the inner periphery thereof and to define an open passage for the fluid in the axially central portion thereof.

Abstract: A filter element adapted to be incorporated in filter devices such as air filter, oil filter and fuel filter is disclosed which includes a pair of end plates and a filter material folded so as to form a series of pleats and disposed between the end plates to define a hollow cylinder having outer and inner circumferences. The space between the circumferences is divided into at least six areas to contain the pleats with symmetrical pattern. Each of the areas includes a group of the inner ridges, through which the pleats are connected to each other, arranged substantially along the pleat in the adjacent area to thereby vary the length of the pleats connected through the inner ridges of the group.

Abstract: The exhaust gas particle filter has a parabola shaped recess in the core ensuring that the inlet flow of the exhaust gases is directed towards the central filter part. The latter has a lower degree of separation relative to the outer filter part--caused by increased filter porosity and smaller mass--so that the exhaust gases flow through the central filter part in the initial phase. Its larger filter porosity and the small mass cause the temperature reduction of the exhaust gas flowing through to remain small so that a downstream supercharger can respond rapidly. Since the separation of soot particles initially occurs primarily in the central filter part, rapid deposition occurs--despite its low degree of separation--so that the resistance during the operation following the acceleration phase becomes similar to that of the surrounding outer filter part. The latter then offers the capacity of separating soot particles over a longer period without regeneration.

Abstract: A fiber bed separator formed of a bed of staple fibers is provided. A discontinuity is created within the bed of fibers at a selected location to improve the drainage of liquids from the fiber bed.

Abstract: A carbon particulates cleaning device for use in a diesel engine of an automobile or the like comprises an exhaust gas main pipe, an exhaust gas branch pipe diverged from the exhaust main pipe, a carbon particulates catching member which is provided within at least one of the exhaust gas main pipe and the exhaust gas branch pipe, a valve means by which exhaust gas is selectively supplied into the exhaust gas main pipe or the exhaust gas branch pipe, a heating means which heats the carbon particulates catching member, a gas supplying means which supplies gas into the carbon particulates catching member when the carbon particulates catching member is heated and a control means which controls each operation of the valve means, the heating means and the gas supplying means.

Abstract: A dust collecting filter is provided with a zigzag shaped filter member having small meshes and comparatively large flowing resistance, which is disposed within a casing so that the zigzag shaped cross section thereof extends in the fluid flowing direction. Other filter members having comparatively small flowing resistance are charged within the spaces defined by the zigzag shaped filter member.

Abstract: The system is adapted to improve the efficiency and smooth operation of the automobile engine and reduce pollutants expelled from the engine. The normal carburetion function is supplemented by a vacuum induction technique to supply saturated (moisture laden) air to the carburetor where it is mixed with the existing gasoline vapor passing through the carburetor throat. The system is a feedback type using air pressure, preferably filtered by the vehicle air filter (cleaner), coupled to a fuel-water liquid tank where the air passes through the liquid to provide a liquid saturated air source that feeds back to the carburetor throat preferably just above the throttle plate.

Abstract: A granular bed filter device comprising two gas-permeable walls bounding an annular filter bed disposed in a housing. The walls extend downwardly in a taper together and are inclined upwardly toward the central axis of the filter bed. A nozzle tube projects from above into the housing and has nozzles which are directed against the inner wall of the filter bed. In order to regenerate the dust-laden filter bed, compressed air is blown intermittently through the nozzle tube while at the same time the nozzle tube is set in motion by a motor. The accumulations of dust contained in the filter bed are ejected in agglomerated form through the outer wall and fall down into the region of a discharging conveyor.

Abstract: A low velocity converging flow filter for removing at least part of the solids content from a solids-bearing fluid or fluid mixture comprising a generally conically shaped housing the larger diameter end of which forms an inlet for the fluid or fluid mixture and the smaller diameter end of which an exit therefor, a plurality of spaced, annular segments of progressively decreasing diameter being mounted in the housing in a manner complementary to the conical shape of the housing, each segment including a lip or flange at the downstream end thereof to deflect solids striking same into the main fluid stream passing through the filter while permitting fluid to pass around the lip or flange into the spacing between adjacent segments for removal from the filter. The segments may be porous to allow injection of fluid into the fluid stream to enhance dilution of solids in the stream in the region of the lip or flange.

Abstract: A filter for removing airborne grease has spaced front and rear walls each with a series of transverse louvers extending into the interior of the filter and opening downwardly. A filter media of expanded metal sheets is sandwiched between the front and rear walls.

Abstract: A fiber bed element and process for removing aerosols from gas streams wherein a bed of fibers is packed to a desired packing density between two foraminous screens. A substantial portion of the fibers in the bed are positioned in a generally parallel arrangement such that the element can be mounted in an operative position with such substantial portion of the fibers extending in a generally vertical direction to enhance drainage of collected aerosols from the element to thereby allow-operation at even high bed velocities with reduced re-entrainment of collected liquid and thereby increase the total collection efficiency of the element. In the process, the bed element is mounted such that the parallel fibers extend in a generally vertical direction and the gas to be treated is passed through the bed at a predetermined velocity.

Abstract: A two-stage air-oil separator is connected to the air exhaust system of a compressor. The first stage has a pleated extended area agglomerator formed of layers of glass fiber material. The second stage has radially spaced filter elements with high loft filter material layers held between vinyl-coated glass scrims. The layers in the various filter elements are wrapped with different tightness. Fluid inlets and outlets are provided.

Abstract: A dimensionally stable filter structure for high temperature applications and method of making it. The filter structure comprises at least one batt of relatively brittle fibers, known to possess outstanding degredation resistance at elevated temperatures, stitch-knitted with high temperature and corrosion resistant yarns.

Abstract: An inlet air cleaner assembly is provided for the air intake of gas turbine engines comprising, in combination, an array of vortex air cleaners removing coarse and heavy contaminant particles, but not light and well dispersed contaminant particles, and an array of sheets of filamentary woven or nonwoven material, arranged to receive partially cleaned air from the vortex air cleaner array, and remove light and well dispersed contaminant particles suspended therein.

Abstract: This invention provides vertically disposed fiber bed elements and separators containing the same wherein "bubble re-entrainment" of a collected liquid phase in a gas stream flowing through the fiber bed is substantially eliminated or reduced. "Bubble re-entrainment" refers to that re-entrainment of liquid which occurs at the bottom of the fiber bed where the cumulative drainage of the liquid is at its maximum. This is accomplished by providing at the bottom of the fiber bed a vertically disposed gas flow baffle means such as, e.g., a baffle plate, such that some portion of the fiber bed is disposed downstream of the baffle means and shielded by the lee side of said baffle means from the moving gas stream, said shielding being effective throughout the shielded portion of the fiber bed to reduce the bed velocity of any gas flowing therethrough to below a bubble re-entraining velocity.

Abstract: A self-supporting, self-gasketing, multi-stage, variable density glass fiber sleeve filter is disclosed and includes a reusable internal wire frame with a composite, low velocity fluid entry filter member on one side of the frame and a fluid egress member on the other side of the frame. The fluid entry filter member is made of two or more layers of medium to long filament puffed glass fiber that differ in thickness and density. The entry and egress members are stitched along longitudinal edge portions so as to form an open ended sleeve that can be slid on and off of the reusable frame. The sleeve is dimensioned such that when it is slid onto the frame both the entry and egress members are tensioned across the frame such that the entry member is outwardly curved with respect to the egress member.

Abstract: A filter element for aerosols and finely divided solid particles suspended in a gas, is formed by depositing a septum of microscopic and submicroscopic unsintered fibers of fibrillatable polytetrafluoroethylene (hereinafter referred to as PTFE) as a random network on a supporting screen. The filter so formed is especially effective to remove liquid and solid particles of micron and submicron size suspended in a gaseous medium to be filtered.A process is described for separating contaminant solid and liquid particles less than about 5 .mu. (micron) in diameter from the gas in which the particles are suspended, comprising introducing primary particles of fibrillatable PTFE less than about 1 .mu.

Abstract: A particle laden gas stream is cleaned by passing it through an all metal fabric including a base with pile fibers connected to the base. The flowing gas forces the pile fibers to lie down upon each other to form a depth filter media adapted to entrap fine particles. This depth filter media is cleaned to remove entrapped particles by passing air through the fabric in a direction counter to the direction the particle laden gas flows through the fabric. Consequently, the pile fibers tend to open and extend outwardly from the base, permitting entrapped particles to be carried by the air from the fabric. Apparatus including a tubular element made of an all metal pile fabric is also disclosed. The tubular element has associated with it one or more nozzles adapted to blow air through the fabric along an incremental portion of the tubular element. Consequently, a small portion of the fabric is cleaned while simultaneously the remainder of the fabric filters particles from the gas stream.