Abstract: A receptacle (14) open in its upper part into which opens a conduit (13), is inserted between a device (11) for fast extraction and the stripping zone (18). The receptacle (14) consists at its base of at least one diffuser (15) fed in fluidization gas and to which the solid particles are put in a dense fluidized bed state (17), whose density ranges between 300 and 800 kg.m−3, then escape by overflow from the receptacle (14) toward the stripping zone (18) located below.

Abstract: An air filter for vehicles which includes a main body defining a chamber, a discharge outlet communicating with said chamber for discharging clean air therefrom, a disc-type baffle positioned to divide the chamber and the discharge outlet into two filtering zones, supporting and positioning plates spring-mounted to opposite sides of the disc-type baffle, said supporting and positioning plates having a smaller dimension than the chamber, an air inlet which branches into separate guide tubes which communicate with the two filtering zones of the chamber and filter elements mounted on each of said supporting and partitioning plates and spaced apart from the walls of the chamber within the filtering zones, said filter means defining an open center core for receiving air from said guide tubes.

Abstract: An induction assembly (100) for a high efficiency air filter includes a primary intake plenum (102), a primary throat aperture (106), a secondary intake plenum (112), a momentum transfer section (114), a static regain section (116), and a discharge opening (122). The primary intake plenum (102) directs primary air at high pressure to the primary throat aperture (106), which constricts the flow of the primary air and consequently increases the primary air velocity. The primary throat aperture (106) directs the high velocity primary air into the momentum transfer section (114), thus creating a negative pressure region by the Bernoulli principle and drawing a substantially equal quantity of the secondary air into the momentum transfer section (114). After the primary and secondary gasses mix in the momentum transfer section (114), the gas mixture continues on into the static regain section (116).

Abstract: An air pollution control apparatus for capturing airborne pollutants present in a relatively confined environment. The apparatus includes a portable airborne-pollutant capturing device movable to a site of pollutant origin and having at least one airborne-pollutant collector member which can be non-limitedly exemplified as a collection hood positionable at the site of pollution for pollutant collection or a painting tray upon which items can be placed and painted and beneath which resultant pollutant can be collected. A vacuum system is present within the capturing device and is in communication with the one or more collector members to draw airborne pollutants into the capturing device through the pollutant collector member. Actual capture of pollutants is accomplished by a filter system within the capturing device. The filter system can include one filter or more than one identical or different filters chosen for enhanced filtration capabilities in relation to pollutants present.

Abstract: A multiple well header system includes an upright header, a plurality of inlet pipes and an outlet pipe. The header has a substantially vertical orientation relative to the ground. The inlet pipes are for interconnection with separate gas wells to allow for passage of methane coal gas and water vapor entrained with the gas therethrough. Each inlet pipe is mounted to a continuous sidewall of the header through an inlet opening of the header. Each inlet pipe is in communication with an interior chamber of the header. The water vapor enters the interior chamber of the header through the inlet pipes and separates from the gas and falls to and condenses above and within a water collection area of the header. The gas enters the interior chamber of the header through the inlet pipes and rises to an upper end of the header. The inlet pipes are arranged in series vertically and in a plurality of horizontal pairs on the header. The outlet pipe is for interconnection with an external location.

Abstract: In a centrifugal separator for separating a liquid from a compressed gas, a baffle is provided to separate the centrifugal chamber into an upper sub-chamber and a lower sub-chamber but does not contact the walls of the chamber thereby being insufficient to prevent downward flow of separated liquid along the interior wall of the two sub-chambers, and insufficient to prevent flow of compressed gas from one sub-chamber to the other sub-chamber, the baffle nevertheless being sufficient to prevent turbulent gas flow in the lower sub-chamber when collected liquid is drained therefrom.

Abstract: A cyclone type dust collector having a raw air intake aperture, an air separating chamber including a cylinder of upper part and a reversed circular cone of lower part, inner and outer clean air exhaust ducts, the bottom of the air exhaust ducts being closed, the bottom of the reversed circular cone being opened, the exhaust ducts coaxially disposed passing through the air separating chamber, and the surface of the exhaust ducts being provided with many small holes or mesh, small balls or the like being filled between the outer and inner clean air exhaust ducts.

Abstract: A pressure vessel venting, dust collecting, and noise silencing system for continuous venting of dry process air during the filling and depressurization of pressure vessels configured to contain, for example, barite or the like, by filtering of vented air through a filter media, with the air discharge being controlled by a pressure sensor actuating a depressurizing regulator valve, located between the vessel and the filter. The present system contemplated a filter which may be cleaned by reverse pulse pressurization or backwash, thereby providing low maintenance filtration while preventing particle emissions into the atmosphere. The present system utilizes a high capacity, stacked filtration medium, which provides a greater filtration, with a surface contact area far in excess of the present systems on the market, which primarily rely upon bag house filtration.

Abstract: A dust collection/control system is disclosed utilized in a floor polishing machine (10) in the most preferred form. A polishing member (16) for maintaining a floor surface as it is moved along the floor is located and rotated within a housing or shield (186) including a circular, planar portion (92) terminating at its periphery in a downwardly extending flange (94) including a flexible skirt (95) which engages the floor. The rotation of the polishing member (16) within the housing (186) passively generates an air current contained within the housing (186).

Abstract: An exhaust filter for insertion into an exhaust port of a liquid bath vacuum cleaner has an elongated, tubular inlet secured to a lower housing, which lower housing is secured within an upper housing. The upper end of the tubular inlet extends into the upper housing and is provided with a flat top portion and a series of openings between angled vanes so as to direct air flow entering the tubular inlet evenly around the circumference of the angle vanes and through a HEPA filter sealingly secured between the lower and upper housings. Air flows through the HEPA air filter and out slotted openings in opposed ends of the exhaust filter. The flow of air at one end passes by a rotary blade having an indicator element thereon, which indicates the condition of the HEPA filter, and when the exhaust filter must be replaced.

Abstract: A gas filtering device for a light gas tank includes a tank, a control valve, a filter, a position block and a position bolt. The control valve is combined with a center hole of the tank body and has a passageway communicating with a hollow interior of the tank, with the filter positioned under the lower end of the passageway. Thus fuel gas is filtered become pure with water and miscellaneous matters removed by the filter when it flows out, so fuel gas may burn completely, with heat energy elevated in burning.

Abstract: An exhaust system for a semiconductor etcher that utilizes corrosive gas. Specifically, the present invention exhausts residual corrosive gas from the exit load lock compartment of a semiconductor etcher. For instance, at the completion of the etching process of semiconductor wafers, the exit load lock compartment of an etcher contains the etched wafers along with residual corrosive gas. When the exit load lock compartment pressure returns to about 1 atmosphere, the residual corrosive gas begins to escape. Within an embodiment of the present invention, an exhaust box is adjacently located to the exit load lock compartment to exhaust the residual corrosive gas from it. The exhaust box is a specifically shaped hollow box that has an intake slot and an exhaust aperture. Two edges that partly form the intake slot are parallel to the outer side edge of the exit load lock compartment when its door is open. The intake slot length matches the outer side edge length of the exit load lock compartment.

Abstract: Smoky gas in conduit or closed space is disinfected by a box body, a blower which is arranged within said box body, an input openings and two output opening which can be switched alternately, a feedback pipe connected to the input opening, a vaporization device and a water collection tank connected to above two output opening, respectively, wherein the vaporization device is extended outside the box body with a circulation pipe and the water collection tank extended outside the box body with a gas outlet pipe; during its operation, feedback pipe and circulation pipe are connected to distal end of conduit or closed space, the disinfecting gas generated by vaporization device is sent to conduit or closed space with the help of blower; after finishing disinfecting work, the gas in feedback pipe is filtered by water collection tank and the purified gas is discharged to atmosphere.

Abstract: A system which reduces the transmission of noxious fumes into the surrounding air during the application of a heated liquid roofing product on a roof. A mobile tanker or kettle contains a supply of the heated liquid. The air space within the tanker or vessel above the liquid product communicates with a mobile filtration unit by a first duct. A rooftop carrier for the liquid product has a fume collection hood which communicates with the filtration unit by a second duct. A blower in the filtration unit creates negative pressure which draws the noxious fumes from the tanker or vessel and carrier through the ducts and into and through the filtration unit. The filtration unit has a series of airtight chambers mounted on a mobile truck bed, each containing a different type of filtering medium to remove various components of the noxious fumes as the fumes move through the filtration unit.

Abstract: The present invention provides a fabric filter apparatus and a method of feeding dusty gas to the dusty gas section of a fabric filter apparatus. The housing (11) of the fabric filter apparatus includes at least one substantially vertically extending duct (13) the lower end of which is in fluid communication with the dusty gas inlet (31). The duct diverts a portion of the dusty gas entering the fabric filter apparatus and delivers it to a corner of the housing (11) at a position intermediate the level of the porting plate (40) and the bottom of the circular filter bag array (50).

Abstract: An air cleaner used regardless of a change in condition caused due to the presence/absence of an air valve, and thus it reduces the number of parts used, lowers the cost, and eliminates the requirement of changing the layout of peripheral parts of the air cleaner. One of an upper case and a lower case of the air cleaner has an intake port through which air is drawn into an internal space of the one case, and an integral partition wall is disposed near the intake port so as to isolate a portion of the internal space to form an extra space. The partition wall has a first surface facing the intake port and having a first opening formed therein, and a second surface facing the extra space and intersecting the first surface at an axis of intersection. The second surface has a second opening spaced from the axis of intersection by the same distance as the first opening is spaced from the axis of intersection.

Abstract: A moisture and contaminant separator for compressed air includes: an outer cylinder having an upper mist accumulator and a lower water collector; and an inner cylinder secured in a central portion of the outer cylinder having an impinging condenser formed in the inner cylinder provided with a plurality of leftward and rightward oriented air passages in the impinging condenser to allow the crossing impact, impinging, mixing, settling and condensation of water mist or contaminant particles laden in the compressed air stream into the separator to be dropped and collected in the lower water collector of the outer cylinder; upon the primary removal of water and contaminants from the compressed air stream, the mist still carried on the air stream will be accumulated on the inside wall of the upper mist accumulator and then drained into the lower collector for further removal of the mist and contaminants laden in the air; and the demisted dry air will be delivered outwardly through an upper port.

Abstract: An apparatus for the separation of ash from a flue gas stream has a hopper defining a flow chamber for the flue gas stream. The hopper has an upper portion and a lower portion. The upper portion defines a horizontal flue gas inlet opening and a vertical flue gas outlet opening. The lower portion defines a hopper collector opposite the inlet opening. A plurality of generally triangular planar block-off plates are oriented horizontally across the flue gas inlet opening and define a plurality of triangular initial flue path openings therebetween. A plurality of triangular flow plates are mounted to the block-off plates adjacent the flow path openings. The flow plates extend vertically downward toward the hopper collector whereby the flow plates define second flow path openings therebetween in fluid connection with the flue gas outlet opening.

Abstract: A method for performing a function or an operation involving a material, in particular, a non-gaseous material such as a biological material subjected to a scientific investigation, under a gaseous atmosphere in a closed chamber comprising performing the operation in a housing comprising i) first chamber walls defining a first chamber containing a gaseous atmosphere and ii) second chamber walls defining a second chamber substantially enclosing the first chamber, the second chamber containing a gaseous atmosphere between the first and second chamber walls, the operation being performed in the first chamber while a) the partial pressure of the selected gas species or the total gas pressure in the atmosphere of the second chamber is lower than the partial pressure of the selected species of the total gas pressure, respectively, of the gaseous atmosphere in an adjacent outer third chamber or space. The invention also relates to a housing for performing the operation mentioned above.

Abstract: An apparatus for primary air/oil separation for an oil-flooded air compressor, the apparatus includes a tank having a sidewall, a bottom end and a top end. The sidewall and ends define a tank separation chamber. The apparatus further includes a flow conduit for flowing an air/oil mixture from the compressor into the tank separation chamber. A primary separator element is located in the chamber and provides primary separation of the air/oil mixture. The primary separator element is flow connected to the flow conduit and includes a body with at least two discharge ends and an arcuate elbow flow connected to each of the at least two discharge ends. Each elbow has an outer peripheral portion and an inner peripheral portion. As the air/oil mixture is forced through the separator element, the oil is drawn to the outer peripheral portion and the compressed air is located in the inner peripheral portion. In this way, primary separation of the oil and the air is achieved.

Abstract: An air precleaner and method for centrifugally ejecting heavier-than-air particulate debris from an air stream utilizes a circular separator chamber formed with a toroidal dome for smooth airflow transition of the vortex airflow moving through the separator chamber in a cyclonic pattern upwardly from an inlet in a base of the precleaner past a debris ejection duct where it is folded over by the toroidal dome for whirlpooling down to an outlet in the base radially inwardly of and through the upwardly moving vortex airflow. The area for the airflow in the separator chamber progressively decreases linearly to increase the speed of the airflow in the chamber. A particle accelerator assembly includes a plurality of appendages that arc back from a central hub in a swept-back attitude relative to a direction of the vortex airflow.

Abstract: In an aircraft, a pressure swing adsorption system (23) is used both for removing carbon dioxide and water vapour from recycled cabin air and for producing in an emergency oxygen from pressurized engine bleed air.

Abstract: A forced recirculation of a part of the untreated flue gas is established along the inside wall of a dry scrubber by providing a counterflowing gas flow along the length of a dry scrubber housing wall to prevent deposition of wet particulate material on the inside walls caused by recirculation of particulates and flue gas thereon.

Abstract: A forced recirculation of a part of the untreated flue gas is established along the inside wall of a dry scrubber by providing a counterflowing gas flow along the length of a dry scrubber housing wall to prevent deposition of wet particulate material on the inside walls caused by recirculation of particulates and flue gas thereon.

Abstract: Apparatus for filtering solid particles suspended in a gas includes a housing divided by a plate into an upper clean gas chamber and a lower polluted gas chamber. Depending filter elements are secured to apertures in the plate. Polluted gas flows to a distributor, in the lower chamber below the filter elements, to which is coupled a plurality of vertically disposed pipes extending upwardly past the filter elements to outlets disposed in the vicinity of the plate. The upward discharge from these outlets is then deflected downwardly past the filter elements.

Abstract: A system for cleaning the environment of a machine includes the use of a vacuum device connected to tubular frame members which enclose the machine. The tubular frame members serve as air ducts for heat, dirt and ozone management.

Abstract: This invention relates to a flue gas treatment apparatus for treating flue gas in which a contaminant in the form of fine solid particles and a gaseous air pollutant are mixed. In the flue gas treatment apparatus, a gas suction portion (29a) for drawing flue gas therethrough is formed in a funnel (27), jet nozzles (30a,30b,30c) for jetting out compressed gas along an inner peripheral wall of the funnel 27 are provided adjacent the gas suction port (29a), and a discharge port (27a) is formed in a lower part of the funnel (27).

Abstract: An automatically controlled water spray air purification system is incorporated in a heating, ventilating and air conditioning unit serving a conditioned interior building space. The purification system is operative to receive a portion of the return air that would normally be flowed through the unit, mix the received return air with a quantity of outside ventilation air, purify the return air/outside air mixture using water sprayed from a sump portion of the purification system, and flow the purified air into the unit for mixture therein with the balance of the return air being flowed therethrough to the conditioned space. Damper structures on the unit and its associated air purification system permit selective variance of the percentage of the unit discharge air that has traversed the purification system.

Abstract: An air intake protection device includes a deflector for directing polluted inlet air in a cyclonic motion as it enters a pollution chamber forcing heavier pollutant particles toward the inside wall of the pollution chamber, causing them to fall into a debris collection chamber. Lighter pollutant particles are engaged by a non-planar filter and a second, final filter. Clean, filtered air is thereby forced through a clean air chamber to an air outlet which communicates the clean, filtered air from the device housing.

Abstract: A dust-separation cyclone is disclosed which includes a volute-shaped separation chamber constructed so that the path of dust containing gas circulating therein describes substantially one single loop, and the gas flow is separated into two separate sub-streams. The separation chamber is constructed so as to include two lobes, with each lobe providing an airflow path for a different one of the sub-streams to an outlet passageway. The flow path within the lobes is substantially symmetrical about a pre-defined plane and the lobes are shaped so as to unite the sub-streams after substantially a single loop of flow along the path. The united sub-streams are then provided to the outlet passageway.

Abstract: An engine air intake system comprises a primary inlet tube or snorkel with an opening that provides air to the air cleaner, and a secondary inlet opening located downstream from the primary inlet opening. The primary inlet tube also has a low point, with a drain to eliminate any of the water. If the primary inlet tube becomes partially or completely blocked with water, the secondary inlet tube will provide the necessary air to the engine until the water is eliminated through the drain.

Abstract: A pavement grinder for grinding and grooving pavement surfaces has a grinding carriage with a rotating arbor supporting a number of radial blades. The arbor is directly coupled to shafts of hydraulic motors with an adaptor between the arbor shaft and the motor shaft. Debris from grinding is removed by a removal system using suction. Suction bars extend behind and to the sides of the arbor and a shroud is positioned in front of the arbor. The debris is suctioned to a separation tank which directs the debris downward away from the vacuum force. Gravity and the downward momentum of the debris is greater than the vacuum force, so the debris is separated from the air flow. The debris is directed to the bottom of the tank and enters a slurry which is pumped for disposal.

Abstract: This low-profile filtration module has a blower partially occupying an equalization chamber above a standard filter unit. A diffuser plate is interposed between the filter and the equalization chamber, and has a plurality of openings elongated in a direction perpendicular to the planes of the filter pleats. The density of the openings is increased at the portions of the equalization chamber where the space for lateral air flow is decreased by the presence of the blower.

Abstract: A disposable filter for heating and ventilating registers wherein a supporting framework includes apertures with removable cover portions which permit selective air flow, means for securing the framework to the register or adjacent structural members and re-closable means for admitting a filter element to an interior cavity. In alternative configurations, differing filter media or replacement media may be mounted to the framework. A separately attached border trim may also be included for oversize registers. Also considered is a finish cover including means for retaining the filter to the cover and the cover to the ductwork port.

Abstract: A multistage vortex reactor for contacting a gas stream with a gas, a fluid or other stream, comprising a housing having end walls and a peripheral side wall defining an elongated generally cylindrical vortex chamber having an inlet end and an outlet end, a first inlet in the inlet end of the vortex chamber for introducing a first gas stream in a swirling motion into the vortex chamber, a second inlet for introducing a second gas stream adjacent the inlet end of the vortex chamber for flowing around at least a part of the vortex chamber for separating the first stream from said chamber walls, a supply duct divides a gas stream into at least a first gas stream and a second gas stream and introduces the first gas stream into the first inlet in the vortex chamber and the second gas stream into the second inlet, an injector for introducing a liquid into the first gas stream in the vortex chamber, and an outlet for continuously removing gas from the vortex chamber.

Abstract: There is disclosed an air cleaner of an engine for a vehicle. The air cleaner shaped by fitting upper and lower cases together includes an air intake unit inclined downwards so that a cylindrical part, provided at the top end of the air intake unit, for joining an air valve is disposed in a relatively lower position than the air intake unit. During a process of airtightly fitting the upper and lower cases, this arrangement restrains an engine overall height to a low value and prevents fluctuations in sectional area of the air intake unit which are due to reconstruction of the air intake unit to eliminate the difficulty caused particularly in a portion for joining the air valve to the air intake unit.

Abstract: This invention is a filter assembly to be installed in passenger motor vehicles for the protection of the occupants from pollution originating from either exterior the vehicle and/or interior the vehicle. The assembly is preferably installed in the plenum of the vent which is connected to the cowl plenum chamber of the vehicle's heating-cooling system. The assembly is also preferably equipped with a sensor switch that notifies the drive whenever the filter becomes dirty and must be replaced. The assembly includes a hot fluid heater, such as a hot water heater, which protects the filter from freezing and keeps the filter dry. The assembly prevents pollutants, which are emitted from the exhaust fumes of motor vehicles, as well as odors, hydrocarbons, smoke, soot, dust and allergens-pollen from polluting the motor vehicle interior. By installing the filter assembly in motor vehicles, we can be assured of breathing purer air.

Abstract: A crankcase filter assembly for filtering air in a crankcase ventilation system. The crankcase filter assembly (71) includes a crankcase filter housing disposed in an air cleaner assembly. The crankcase filter housing defines an opening in fluid communication with the air cleaner assembly and includes a first air inlet or drain hole spaced from opening and an air outlet in fluid communication with an engine crankcase. A filter cartridge supports first and second filters within the crankcase filter housing in respective first and second filter positions establishing a filter spacing therebetween. The filter cartridge interconnects the first and second filters for allowing their insertion and removable from the crankcase filter housing as a single unitary cartridge structure while maintaining the filter spacing between the first and second filters.

Abstract: Apparatus for a home workshop to collect wood dust from a plurality of work stations and deposit the dust in a container. There are suction hoses, one to each work station. At their outlet ends, the hoses are connected to a single control means operable to selectively connect one hose at a time to the container.

Abstract: An air cleaner assembly for a motor vehicle includes a housing which carries a substantially flat valve cover plate which defines a pair of openings. A valve is slidable relative to the valve cover plate through a linkage operated from the vehicle operator's compartment to cover one or the other of the openings in the valve cover plate. During normal operation of the vehicle, combustion air is communicated to the air cleaner housing through the normal air induction system. However, when heavy snow blocks communication through the normal air induction system, the vehicle operator operates the linkage to move the valve to a position opening the other opening into the air cleaner, so that underhood air may be used for combustion as long as the normal air induction system is blocked by snow.

Abstract: A manifold receives gas streams from a plurality of gas purifiers arranged in parallel. The manifold comprises a plurality of pipe portions wiht a successively increasing diameter forming a main channel in the manifold. A first pipe portion projects into a second pipe portion, whereby, in the gap between the pipe portions a connection channel is formed which is substantially parallel to the main channel. The second pipe portion projects into a third pipe portion, thus forming a gap between the pipe portions and so on. Outlet tube portion from cyclones are connected to the connection channels.

Abstract: A method of removing airborne contaminant material from a work area by isolating the work area from the surrounding environment, providing at least one entrance into the isolated work area, and creating a negative pressure within the isolated work area by exhausting the air therefrom. Make-up air is introduced into the isolated work area by ducting the air directly to the vicinity where the contaminant material is being removed in order to entrap airborne contaminant material created when the contaminate material is being removed. The air being exhausted from the isolated work area is filtered to remove the contaminant material therefrom. A manifold and ducting assembly are also provided to regulate and direct the flow of make-up air to the vicinity where the contaminatn material is being removed.

Abstract: Two flat filter elements are disposed in a casing in such a manner that they are inclined to each other and arranged symmetrical with respect to a middle portion of the casing. With this, two dust side chambers are defined in the casing at the lower sides of the filter elements, to which members air inlet openings formed in side walls of the casing are exposed respectively. A cover is disposed on the casing to define at the upper sides of the two filter elements a common clean side chamber to which an air outlet opening formed in the cover is exposed. The cover is formed with two substantially identical air flow passages which independently extend from the respective filter elements to the air outlet opening of the cover.

Abstract: In a vehicle in which an air cleaner is disposed above an engine and connected with the engine through an intake pipe, an air intake passage for guiding air into the air cleaner is provided on the upper surface of a front fender covering a front wheel of the vehicle, so that particulates such as dust or the like entrained in running air is separated from the running air to admit the air free of the particulates into the air cleaner.

Abstract: An engine induction air filter element and a positive crankcase ventilation breather element are combined into a single discardable cartridge which is received within an air cleaner housing in a vehicle induction air system. The induction air filter media is comprised of an array of pleats, the tips of which respectfully define the upstream and downstream planes of the filter. A sealant material circumscribes the perimeter of the downstream plane of the induction air filter, and the sealant material on one end thereof includes a projecting portion which supports the breather air filtering media on the one side of the induction air filtering media, with a gap therebetween which receives a partition which is a part of the air cleaner housing. The partition includes a flow restricting aperture, which is closed by the transverse surface of one of the end pleats of the induction air filtering media.

Abstract: A Y-shaped air diverter box is utilized to permit the replacement of a malfunctioning air filtration unit which is being utilized in a contaminated work site ara. The Y-shaped air box is utilized in such a manner so as to permit the purging and cleaning of the air conduit which normally connects the air filtration unit to an air exhaust as well as providing a means for cleaning the exhaust side of the new air filtration unit which is being placed into service.

Abstract: A cartridge air filter for use with an internal combustion engine and method of making the air filter. The air filter comprises a fuel spitback shield having means for collecting spitback fuel from a carburetor and means for substantially containing collected fuel spitback with the collecting means for re-injection into the engine.

Abstract: An airflow controller for use in an air filter for an internal combustion engine. The airflow controller comprises a frame and means for movably mounting the frame in the air filter for relatively lateral movement therein. The airflow controller frame comprises a plate that can restrict airflow into a carburetor to choke an engine and a spitback shield having an air intake volute and a venturi cone.

Abstract: An air cleaner includes closure means comprised of a partition wall integrally formed on one side of a filter member, which closure means will selectively shut either a first air-intake port for sucking outside air into a filtration room or a second air-intake port to suck air into the filtration room through an engine room. One of these first and second air-intake ports is selectively closed by a partition wall by turning the positioning of the filter member.

Abstract: The invention is concerned with pneumatic apparatus for removing fibres, dust and threads from industrial processes, particularly in the textile industry. In an arrangement in which there is a plurality of collecting heads each associated with a part of a machine from which dust, fibres or threads are likely to be emitted, each of these collectors leads into a common duct which in turn leads to a suction fan and filter.The suction pressure (or any other physical characteristic of the air in the duct which relates to the suction pressure) is detected, and a signal from this detector is compared with a signal corresponding to a desired suction pressure and the output signal from the comparator used to control the speed of the driving motor for the suction fan.