Abstract: An oil injected screw compressor has an oil separating mechanism integrated with a compressor and hence is made compact in size. A male rotor and a female rotor are received in a rotor casing. The shafts of these rotors are arranged substantially in a horizontal direction. An inner cylindrical wall is arranged under the rotor casing with its center axis arranged substantially in a vertical direction and an outer wall is arranged substantially in a concentric position with the inner wall. A lower casing is hermetically joined to the outer wall. Oil in the working gas which is injected in the compression process of the oil injected screw compressor is primarily separated from the working gas between the inner wall and the outer wall. The primarily separated working gas flows up inside the inner wall and is guided through a manifold into an oil separating element case where the oil is secondarily separated from the working gas.

Abstract: A device for cleaning a perforated radiator cage with at least one end face and peripheral side on an agricultural harvesting machine, wherein the device consists of an external brush which is associated with the radiator cage and which is in turn surrounded by a unitary air extractor proximate to the radiator cage.

Abstract: A method for cleaning air and an air cleaner utilizing it are disclosed, by which the air cleaner can be made smaller than the conventional air cleaners when the performances are the same. According to the method of the invention, a filter formed on peripheral portion of a disk is formed along the peripheral portion of the disk so as to surround inside area of the disk is rotated, which filter is bent into wave-shape such that irregularities of the wave are formed in radial direction of the disk, thereby discharging air existing on the inside area of the disk to outside of the disk through the filter.

Abstract: An oil separator includes a casing 1 and a rotor 2, said rotor being arranged rotatably within said casing and having a flow chamber 3 through which oil-laden air 4 can pass, with porous material being arranged in the flow chamber 3. At least one unit of porous material is arranged in the flow chamber 3 which includes outer layers of a porous metal 6 and an interlaid layer 7 comprising fibre material.

Abstract: An oil separator for use in the crankcase of an internal combustion engine. A rotatable shaft is located in the crankcase and a case lead-in is sealably fixed to the crankcase and concentric to the shaft. A flat filter disk has one face which abuts the case lead-in and an opposite face which is directly secured to the shaft, so that the filter disk rotates with the shaft. Crankcase gasses flow through the filter disk and the filtered gas flows out an opening defined by the case lead-in. The case lead-in may have a flange secured to a connecting piece which passes through a crankcase wall. A draining edge on the outer surface of the case-lead-in prevents oil from contacting the filter when the shaft is at rest.

Abstract: For cleaning of crankcase gas produced by an internal combustion engine, that is arranged for propelling a vehicle, use is made of a centrifugal separator having a centrifugal rotor that is mounted on the vehicle. The cleaning efficiency of the centrifugal separator is changed by changing the rotational speed of an electrical motor, that is connected to a source of current on the vehicle and arranged for driving said centrifugal rotor.

Abstract: For cleaning of crankcase gas produced by an internal combustion engine use is made of a centrifugal rotor, that is journalled in a frame through two axially separated bearings. The centrifugal rotor is caused to rotate by use of part of it also as a rotor of an electrical motor. The electrical motor has a stator, which is kept non-rotating and is charged with electric current for rotation of the centrifugal rotor, the centrifugal rotor being kept journalled during its rotation only in the two bearings.

Abstract: An air/oil separator (40) comprises a rotor (60) and a casing (62) surrounding the rotor (60). The casing (60) has an inlet (64) at a first axial position (A) for the supply of an air and oil mixture into the air/oil separator (40). The rotor (60) has an outlet (66) for discharging cleaned air from the air/oil separator (40). The rotor (60) carries a plurality of porous members (68, 70, 72). The porous members (68, 70, 72) have an inlet (74) at a second axial position (B) and an outlet (76) at a third axial position (C). The third axial position (C) is arranged axially between the first axial position (A) and the second axial position (B). A first passage (88) supplies the air and oil mixture from the inlet (64) in the casing (62) to the inlet (74) to the porous members (68, 70, 72). A second passage (94) supplies cleaned air from the porous members (68, 70, 72) to the outlet (66) in the rotor (60).

Abstract: A method for cleaning air and an air cleaner utilizing it are disclosed, by which the air cleaner can be made smaller than the conventional air cleaners when the performances are the same. According to the method of the invention, a filter formed on peripheral portion of a disk is formed along the peripheral portion of the disk so as to surround inside area of the disk is rotated, which filter is bent into wave-shape such that irregularities of the wave are formed in radial direction of the disk, thereby discharging air existing on the inside area of the disk to outside of the disk through the filter.

Abstract: An air filter suitable for use on an engine is provided. The air filter includes a hollow filter body into which is positioned a filter installation unit capable of turning within the filter body and constructed to receive a filtering filter. A main air flow opening is formed in one side of the filter body, and a sub air flow opening is formed in another side of the filter body. A dust pick-up part is formed in the filter body having a dust outlet. A ventilator is provided to direct filtered air against an interior surface of a turning filtering filter, and foreign matter accumulated on an exterior surface of the filtering filter is dislodged into the dust pick-up part before being forcibly expelled through the dust outlet.

Abstract: The invention relates to an oil separator, in particular for application in a crankcase breather for an internal combustion engine, with a filter disc (1), fitted to a driven shaft (2). Gases from the crankcase pas through the filter disc (1). Oil and soot particles adhering to the filter disc (1) are spun off the turning filter disc (1).

Abstract: This invention is directed to a continuously cleanable, high performance filtration apparatus and a method for using the apparatus. The apparatus is a radial inflow centrifugal filtration device, which includes a filter element located within a chamber and rotatably coupled to a filtered fluid outlet in a bulkhead that abuts the chamber. The filter element is generally tubular, its side-walls encircling and, thus, defining an interior plenum. The filter element side-walls incorporate a filter media, preferably a laminated microporous membrane filter media. The filter element is rotatably coupled at the filtered fluid outlet by a seal which can maintain a seal as filter element rotates. Additionally, the device can include a boundary layer momentum transfer device made up of a plurality of stacked annular disks having central openings, each disk separated from adjacent disks by a desired gap. The central openings define a cavity in which the filter element is mounted.

Abstract: A ceiling fan having a rotatable plate. A filtering media is disposed proximate the peripheral edge of plate and rotatable therewith. A number of curved fan blades are coupled with and extend from the plate, and are disposed annularly to define a central opening so that air is pulled toward the blades and through the filter media. In another embodiment, a ceiling fan has a circular plate with a number of fan blades attached to the plate and arranged in a ring shape. The circular plate has a number of spacers that are coupled with a lower ring. At least one section of filter media is located between the plate and the ring. Also, at least one door is coupled with the plate and is located at the peripheral edges of the plate and ring to cover at least a section of the filter media.

Abstract: A method and system for removing particles from a particulate laden gas stream through the use of centripetal and centrifugal forces. A rotating shaft and brushes create centrifugal force upon particulates within the gas, while a centripetal force created by a pressure differential, directs the gas radially inward. The centripetal force may be created and maintained by self-pumping means driven by a rotating shaft. Rinsing means are provided for periodically rinsing particles accumulated within the bristles.

Abstract: An air filtering device including a circular plate, plurality of fan blades fixedly attached to the circular plate, the fan blades extending downwardly from the lower surface of the circular plate; a filter frame having an air permeable cylindrical inner wall, having an upper wall, having a lower wall, and having an air permeable cylindrical outer wall, the air permeable cylindrical inner wall, the air permeable cylindrical outer wall, the upper wall and the lower wall defining a cylindrical filtering media containing space; air filtering media extending annularly around the air permeable cylindrical inner wall within the cylindrical filtering media containing space; and, filter frame attaching means attaching the filter frame so that it extends annularly around the outer edges of the fan blades.

Abstract: A ceiling fan having a rotatable plate. A filtering media is disposed proximate the peripheral edge of plate and rotatable therewith. A number of curved fan blades are coupled with and extend from the plate, and are disposed annularly to define a central opening so that air is pulled toward the blades and through the filtering media. In another embodiment, a ceiling fan has a circular plate with a number of fan blades attached to the plate and arranged in a ring shape. The circular plate has a number of spacers that are coupled with a lower ring. At least one section of filter media is located between the plate and the ring. Also, at least one door is coupled with the plate and is located at the peripheral edges of the plate and ring to cover at least a section of the filter media.

Abstract: Constantly high efficiency of a catalytic converter can only be ensured when the configuration is maintained relatively free of particulate matter. A screen is disposed on the inflow side of the catalytic converter, which continuously or discontinuously transports away the flue dust particles collected by the screen. The flue dust collected is transported by the lateral movement of the screen to one side of the catalytic converter where the collected dust is removed. Alternatively or additionally, a vacuum system may be employed to clean the screen.

Abstract: A vacuum cleaner capable of efficiently separating and eliminating dust and dirt is provided. The vacuum cleaner including a body having open and closed spaces divided by a partition, a suction brush connecting port formed on the upper side of the body and interconnected with the open space, an interconnecting hole formed on the partition for interconnecting the open and closed spaces, a motor mounted in the closed space of the body for generating a suction force, and a dirt collecting unit detachably mounted in the open space of the body for centrifugally separating dirt and dust contained in the air sucked in through the suction brush connecting port by the motor.

Abstract: There is provided an air delivery device and method of moving and filtering air. The air delivery device comprises a housing having an air inlet and an air outlet. Between the air inlet and the air outlet is located an air delivery fan having at least two rotating air moving elements, the rotating air moving elements intersects the flow of air between the air inlet and the air outlet and establishes a higher pressure zone at the air outlet relative to the air inlet. The air delivery fan further comprises at lest one filter element, having at least one upstream filter face and at least one downstream filter face, defining at least one primary flow channel, and rotating along the same axis of rotation as the air moving elements and preferably forming the air moving elements at least in part.

Abstract: A coalescing filter for separating oil from a blowby gas stream includes a coalescing filter element designed with a plurality of relatively small flow-through pores which have the potential for creating a high restriction when wetted due to the surface tension which results. In order to reduce the restriction level, the coalescing filter is attached to a rotating component, such as a gear, so that rotary motion is imparted to the coalescing filter and centrifugal force is generated across the plurality of flow-through pores. By generating centrifugal force, any oil which might otherwise remain in said pores so as to clog the pores is spun out so that the pores of the coalescing filter element remain in a "dry" condition such that any restriction to continued flow is substantially lower than the restriction level when the pores are wetted.

Abstract: There is provided an air delivery device and method of moving and filtering air. The air delivery device comprises a housing having an air inlet and an air outlet. Between the air inlet and the air outlet is located an air delivery fan having at least two rotating air moving elements, the rotating air moving elements intersects the flow of air between the air inlet and the air outlet and establishes a higher pressure zone at the air outlet relative to the air inlet. The air delivery fan further comprises at lest one filter element, having at least one upstream filter face and at least one downstream filter face, defining at least one primary flow channel, and rotating along the same axis of rotation as the air moving elements and preferably forming the air moving elements at least in part.

Abstract: A filtration system that rotates in conjunction with a blower wheel, and a method of attaching the same. The blower wheel typically has a plurality of fan blades arranged in a spaced relationship radially around a blower cavity to define a flow path extending radially outward from the blower cavity through the fan blades when the blower wheel is rotating. The filtration system includes a filter cartridge releasably attachable to the blower wheel in an engaged configuration. The filter cartridge includes a filter medium defining a generally center opening and a filter surface configured to be positioned generally adjacent to the fan blades and to extend across at least a portion of the flow path. In one embodiment, a plurality of flow passages extending through the filter medium.

Abstract: There is provided a moving sorbent filter within an air delivery device. The air delivery device has a housing having an air inlet and an air outlet, between the air inlet and the air outlet is located an air delivery fan having at least two rotating air moving means. The rotating air moving means intersect the flow of air between the air inlet and the air outlet and establish a higher pressure zone at the air outlet relative to the air inlet. The air delivery fan further comprising a moving porous sorbent filter formed of at least one sorbent filter element. The sorbent filter has at least one air passage allowing substantially unimpeded airflow into and through the sorbent filter.

Abstract: Gas is separated from fluent material, particularly a liquid or a cellulose fiber suspension having a consistency of about 8-18%, utilizing a closed separation apparatus having a spiral housing with a central axis, a fluent material inlet channel, a fluent material outlet, and a gas outlet. A pressure differential is maintained between the inlet channel and the spiral housing, and the pressure differential is converted to kinetic energy of the fluent material by causing the fluent material to flow through one or more spiral flow paths through the inlet channel toward the spiral housing. In the spiral housing a rotor is rotated to impart a strong centrifugal force to the fluent material to cause gas to separate and collect adjacent the central axis of the spiral housing, from which the gas is removed. The strong centrifugal force caused by the rotating rotor discharges the fluent material through the outlet. The spiral flow paths rotate with the rotor in the spiral housing.

Abstract: An air filtering device including a circular plate, plurality of fan blades fixedly attached to the circular plate, the fan blades extending downwardly from the lower surface of the circular plate; a filter frame having an air permeable cylindrical inner wall, having an upper wall, having a lower wall, and having an air permeable cylindrical outer wall, the air permeable cylindrical inner wall, the air permeable cylindrical outer wall, the upper wall and the lower wall defining a cylindrical filter media containing space; air filtering media extending annularly around the air permeable cylindrical inner wall within the cylindrical filter media containing space; and, a filter frame attaching mechanism attaching the filter frame so that it extends annularly around the outer edges of the fan blades.

Abstract: In a device for separating solid or liquid particles from a stream of gas, there is an aperture of a suction pipe which is substantially directed towards the axis of an impeller. The suction pipe is surrounded by a dust collecting container. To improve phase separation, especially in a vacuum cleaner in which the dust collecting container is fitted upstream of a dust bag, there is an axial aperture in the impeller and/or a straight aperture from the dust collecting container to the impeller. This generates an air vortex in the region of the opening of the suction pipe which carries the particles outwards where they are further transported into the dust collecting container by a secondary vortex induced therein.

Abstract: Apparatus for the purification of gas and vapor streams by the removal of solid, liquid or aeriform polluting substances; the apparatus including a stator formed as a tubular body having a cylindrical inner wall, which body is furnished with at least one inlet aperture for the admission of gas or vapor streams containing solid, liquid or gaseous impurities and with at least one discharge aperture, a coaxial rotor extending longitudinally and revolvably supported inside the tubular body in such a way as to define with the cylindrical wall at least one annular passage, and an inlet for the admission of liquid into the tubular body.

Abstract: An air filtering, fume collecting mechanism is disclosed in which the contaminated air is drawn by a fan through a filter element which spins transversely across the flow of air being drawn by the fan. The filter element may be a disc removeably mounted on the hub of the fan blade assembly or it may be shaped to function as the impeller itself.

Abstract: A moisture control unit is made up of a housing and a moisture absorption rotor is rotatably supported in the housing. A fan is provided in an exterior wall of the housing and it feeds air into the housing. A heater is contained within the housing adjacent the rotor to evaporate moisture therefrom and a heat exchanger is also provided in the housing. The heat exchanger has a first passageway through which a portion of the air from the fan flows to absorb moisture from the rotor and a second passageway through which moisture-laden air flows from the rotor, the first and second passageways being in heat exchange relationship with each other.

Abstract: Apparatus for removing a wide variety of differing solid and aerosol waste materials from effluent or exhaust streams produced by an industrial process. This invention may be especially useful as a pre- or post-conditioner of the effluent to prevent plugging in any number of available pollution control devices. More particularly, a rotating pack bed filter removes solid and aerosol waste materials, if present, from an effluent and simultaneously regenerates the filter media by (1) heating to thermally decompose the collected material trapped in the filter media into a residue and to drive off gaseous pollutants carried by the collected material and (2) cleaning to remove the residue from the media.

Abstract: A moisture control unit is made up of a body which is partitioned by a partition wall into a plurality of chambers. A dehumidifying opening is provided in a chamber and a humidifying opening is provided in a chamber. A moisture absorption rotor is rotatably provided in the chambers and a heater provided in one of the chambers adjacent to the moisture absorption rotor for evaporating water which is absorbed by the moisture absorption rotor. A part of the moisture absorption rotor which absorbs moisture from air is made heavy to thereby rotate downward from the weight of water while a part of the moisture absorption rotor which is heated by a heater and from which water is evaporated is made light to thereby rotate upward. As a result, the moisture control rotor can rotate by itself without needing a rotary driving source. The moisture control unit has a simplified structure, can be easily miniaturized and installed at a low cost without needing piping.

Abstract: An air filtering, fume collecting mechanism is disclosed in which the contaminated air is drawn by a fan through a filter element which spins transversely across the flow of air being drawn by the fan. The filter element may be a disc removeably mounted on the hub of the fan blade assembly or it may be shaped to function as the impeller itself.

Abstract: A rotary drum filter having a reduced amount of fluff in the enclosure during operation. The volume of the enclosure and the mass flow rate of fluff coming into the enclosure are taken into account when determining a proper speed for the rotary drum so that fluff build up on the filter medium is reduced. By properly balancing these three items, fluff may be removed from the filter enclosure at a rate which is equal to or greater than the rate at which the fluff enters the enclosure. The structure of the rotary drum enclosure provides a high velocity, smooth air flow at the bottom of the filter enclosure. The incoming air and fluff are distributed over the entire length of the floor, so that turbulence is created along the length of the floor. In addition, the floor is curved so that there are no joining positions along the floor where dust can accumulate, and so all fluff entering the enclosure is blown to the top of the enclosure.

Abstract: A self-cleaning filter apparatus for use in removing particulate matter from a transport fluid, such as air, which includes a housing having a pair of spaced pulleys over which an endless filter belt is positioned to present two generally straight filter reaches and two generally curved filter reaches. The endless filter belt includes a permeable substrate formed as an endless belt and a plurality of pleats of filter media extending outwardly from the surface of the substrate so that the transport fluid can pass inwardly therethrough an deposit the particulate material on the exterior surface of the pleats. A suction nozzle is positioned adjacent the outer surface of the endless filter at one of the curved reaches thereof for removing particulate matter deposited on the pleats as they pass along such curved reach.

Abstract: A screen dram for the dewatering and/or washing of cellulose pulp, comprises a first cylinder (2) made from non-stainless material, which is rotatable about its axis (5); a cylindrical screen plate (6) arranged coaxially on the outside of the first cylinder, but at a distance from it, and between the screen plate and the first cylinder an annular chamber (7) which can receive liquid which has passed through the screen plate, which chamber contains passages (26) which extend in the axial direction towards one or both ends of the drum for the withdrawal of the screen liquid. The chamber (7) is lined with stainless steel (8) in the form of one or more cylindrical plate sections (8a, 8b . . . 8n). These, by virtue of shrink joints, can be joined to and bear in seal-tight arrangement against the cylindrical casing of the first cylinder. Preferably, the stainless steel contains at least 5% molybdenum.

Abstract: Gas is separated from fluent material, particularly a liquid or a cellulose fiber suspension having a consistency of about 8-18%, utilizing a closed separation apparatus having a spiral housing with a central axis, a fluent material inlet channel, a fluent material outlet, and a gas outlet. A pressure differential is maintained between the inlet channel and the spiral housing, and the pressure differential is converted to kinetic energy of the fluent material by causing the fluent material to flow through one or more spiral flow paths through the inlet channel toward the spiral housing. In the spiral housing a rotor is rotated to impart a strong centrifugal force to the fluent material to cause gas to separate and collect adjacent the central axis of the spiral housing, from which the gas is removed. The strong centrifugal force caused by the rotating rotor discharges the fluent material through the outlet. The spiral flow paths may be stationary or may rotate with the rotor in the spiral housing.

Abstract: The present invention concerns a filter system for a helical scanner drum of the type having a drum cover provided with an air vent. The filter system includes a replaceable air filter element for entrapping airborne particles when air is drawn through the filter element and means for removably securing the filter element to the drum cover such that the filter element covers the air vent.

Abstract: Rotatable circular plates are stacked apart to form thin air layers therebetween. Rotation of the circular plates moves air over an air treatment material: catalyst or adsorbent. In one embodiment, the air treatment material is affixed to the surface of the circular plates. In another embodiment, the circular plates are formed from the air treatment material. The increased velocity of air relative to the circular plates causes separation of laminar flow, promotes boundary-layer turbulence near the plate surfaces, and promotes propagating stall in the air layers. These phenomena enhance the contact between the flowing air and the air treatment material.

Abstract: An engine air intake screen assembly having a rotating screen is provided. A blade is positioned directly under the screen to scrape accumulated debris off the inside surface of the rotating screen, and to also chop debris flowing through the screen. The screen covers an opening in a blower housing and rotates when the engine is running. In one form, a set screw allows the clearance distance between the blade and the inside surface of the rotating screen to be adjusted.

Abstract: A rotary filter cleaning arrangement (10) for air ducts (100) having a generally rectangular cross-sectional configuration; wherein, the arrangement includes a generally circular filter member (40) mounted for rotary movement on the output shaft (21) of a drive motor (20) suspended from a framework member (30) having a central aperture (32); wherein, the filter member (40) is suspended over the central aperture (32) and cleaned by a radially disposed vacuum arm member (50).

Abstract: An efficient, highly porous fabric filter medium capable of filtering air at temperatures up to about 500.degree. F. (260.degree. C.) has been provided. The filter medium is made from a polyimide fiber and is especially well suited for use in combination with a rotating drum filtering machine, thereby providing high temperature air filtration at a lower initial equipment and installation cost, and with subsequent lower operating and maintenance costs than have been previously possible.

Abstract: The invention is an air pollution abatement system which embodies four different phases. The phases are: the primary impinger section, which removes most of the contaminants by variable density rotational impingement combined with a degreasing solution; the turbo impinger section, which extracts the residual moisture and aerosols introduced within the primary impinger section; the deluge/saturator section, which scrubs the gas with water or chemicals and finally the dehydrator section which hydroextracts the moisture and introduces static electricity to trap any residual micron-sized particulates prior to exhaustion into the atmosphere. The system, while operating, is continuously self-cleaned and computer system managed.

Abstract: A locking structure of a wire rod for a filter element which comprises a support member of either a cylindrical, flat plate or inverted conical shape, a threaded groove helically formed on an outer or inner peripheral surface of the support member, along which groove a wire rod of a desired sectional form is wound, leaving a spiral continuous slit between windings, allowing flow of a fluid to be filtered or separated. Each end portion of the wire rod is bent so as to be merely pushed and firmly secured in a locking hole formed on the support member, without using a locking member such as an insert member or wedge.

Abstract: An apparatus for adsorptive filtering of contaminants from a gaseous stream is provided. The apparatus includes a frame member. The frame includes a base member which is rotatable about an axis. A plurality of walls are attached to the base member and extend axially therefrom to a top member for providing a plurality of circumferential segment areas. The walls include a radially inner side for defining an axially extending inner chamber and a radially outer side for defining an outer periphery. A plurality of adsorption elements, each having an axial first side and an axial second side, are axially spaced in each of said circumferential segment areas. A duct or the like radially directs contaminated air into at least an entire one of the segment areas.

Abstract: An air-cooled internal combustion engine having a rotating screen and a blower housing surrounding the screen. A ring is attached to the housing and positioned circumjacent the screen to define a precisely gauged radial clearance gap between the ring and the rotating screen. The ring provides a tortuous entry path for foreign matter entering through the air intake port between the ring and the screen. The ring includes a downwardly extending groove into which extends an upwardly turned lip of the rotating screen to form the tortuous path for foreign matter entering through the clearance gap between the inner periphery of the ring and the outer periphery of the main portion of the screen. Large debris and foreign matter entering through the tortuous path is chopped up into small pieces, which may then pass through the cooling fins.

Abstract: An improved demisting screen arrangement utilized in a rotary fluid management device (13) of a two-phase thermal management system (1) employs a multi-layered annular screen (34) held in a casing (52) to define a space (54) on the downstream side of the screen (34). The arrangement provides a lower pressure drop across the screen which results in wet vapor passing through the screen (34) at a lower velocity and in thereby preventing the vapor from passing through only a localized section near the inner diameter of the annular screen (34) in the region of the hub (56). This arrangement effectively increase the volume of the screen (34) through which the wet vapor is now caused to flow and, therefore, increases the amount of liquid phase separated from the vapor phase.

Abstract: An oil-air separator having feed blades secured for rotation with a hollow rotor mounted for rotation in a stator housing with the formation of an annular space therebetween. The stator housing has an inlet for an oil-air mixture and an outlet for oil which is separated from the mixture. The feed blades are adapted to suit the contour of the annular space and ensure good separation of the air from the oil while achieving a high outlet oil pressure. The air which is separated from the oil-air mixture flows through a porous layer on the hollow rotor into the hollow rotor for external discharge therefrom.

Abstract: Separation of particulate matter in the form of solids, liquid particles and mixtures thereof from a carrier medium comprising of air, vapor, gases, flue or mixtures thereof by means of a moving form having a moving surface with perforations or apertures which causes the particulate matter to be blocked, intercepted, impacted and deflected away resulting in clean air, vapor, gases etc. devoid of any particulate matter.

Abstract: Apparatus for treating particles while the particles are suspending in a circulating stream of air or other fluid. The apparatus causes particles to rotate around a vertical axis in confined circular paths of travel generally lying in a horizontal plane.

Abstract: Separation of vaporizing oil and smoke to clean polluted air. That is, by inducing the particles to directly impact the revolving filter drum, and some small particles to be intercepted in the meshes and some large particles to collect in the groove means, due to the rotation of blower blades. Clean air will go upwards through the revolving filter drum through a pressure effect. Automatic cleaning of the polluted revolving filter drum and groove means is achieved by rotation of an axial fan causing a centrifugal effect.