Abstract: A pre-filter for an oxygen concentrator having enhanced filtering area. The pre-filter is positioned so that air entering the concentrator's air compressor is filtered to removed particulate contaminants. The pre-filter has an impermeable housing consisting of four walls in a rectangular configuration. There is, within the housing, a first filter pledget of porous filter material and second filter pledget of porous filter material with an air space in-between the pledgets. Each pledget has an exposed filtering surface and a material thickness of porous filter material. The opening of a conduit tube that is in fluid communication with the air compressor is positioned in the air space between the filter pledgets. Air entering the conduit tube passes through one of the exposed filtering surfaces and one material thickness of porous filter material.

Abstract: Either atmospheric pressure or superatmospheric pressure high temperature gases, as from a gasifier or other circulating fluidized bed reactor, are filtered using monolithic ceramic filter elements mounted in an advantageous manner within a vessel. At least one generally upright hollow chamber element is mounted by a tube plate within the vessel, and has at least one gas impervious side wall having a column of openings in it, an open end, and a closed end. Monolithic ceramic filter elements are mounted in the openings. A number of chamber elements are typically provided, e.g. mounted in a circular pattern, and/or mounted to extend downwardly from a top tube plate and upwardly from a bottom tube plate. Backflushing of the filter elements dislodges separated particles, which fall down to the bottom of the vessel and are removed through a central discharge opening.

Abstract: An air cleaning apparatus includes an air passage chamber having a suction port, from which air is sucked, and a discharge port from which the air sucked from the suction port is discharged, an air blower, provided in the air passage chamber, for sucking the air from the suction port into the air passage chamber and discharging the sucked air from the discharge port, and a particle removing mechanism for removing particles contained in the air sucked from the suction port, the entire body of the particle removing mechanism being formed of a material which generates little impurity gas detrimental to processing in a processing space.

Abstract: A diesel particle virtual impactor sampler provides for a total flow through a virtual impactor after the flow passes through a classifier that removes particles substantially larger than the cutoff point of the virtual impactor. The virtual impactor has two outlets, one for minor flow and one for major flow. In a preferred embodiment, filters are used for separately filtering the major and minor flows and collecting the particles carried thereby so that a determination of the concentration of particles above and below the cutoff point can be obtained. Alternately, the major and minor flows and the particles can be passed through particle analyzer instruments for a direct particle measurement of each of the flows.

Abstract: An air filtration system for use in capturing fugitive dust in industrial sweeping operations includes a hopper having internal structure for causing change in the direction of flow of suction air which enters the hopper along with debris collected during an industrial sweeping operation. A plurality of filters is disposed within the hopper for filtering the suction air, each one of the plurality of filters having filter media therein which can be repeatedly purged for cleaning and continuous reuse thereof. Structure is included for providing repeated purging blasts of air to the plurality of filters, and structure is associated with each one of the plurality of filters for causing the purging blasts of air to clean substantially the entire filter media of each one of the filters.

Abstract: A textile machine suction device for dust and other pneumatically conveyable waste includes a separator chamber, a negative pressure line discharging waste into the separator chamber, a first filter screen in the separator chamber for separating the waste from an air stream and for collecting the waste, a second filter screen disposed in the separator chamber, and a negative pressure source acting upon the first and the second filter screens. The two filter screens are disposed adjacent one another in a constellation causing an increasing outflow of air through the second filter screen with increasing soiling and impermeability of the first filter screen to the air stream. The negative pressure line forms a rotating air stream in the separator chamber approximately parallel to the first filter screen for forcing the waste and in particular yarn waste into a motion stripping soiling from the first filter screen.

Abstract: An air filtration system with a safety after-filter that prevents contaminated air being exhausted by using a backup filter and with a mechanism to detect tears or leaks in the primary filters. The safety after-filter assembly attaches to the exhaust of an air filtration system and collects dirt particles which get by the primary filters. Detection of rips, tears, or leaks in the primary filters is accomplished by monitoring the air pressure difference across the safety after-filter and is measured by a differential pressure gauge. If a primary filter develops a tear or leak, the safety after-filter quickly becomes clogged with dirt and the pressure difference across the safety after-filter increases. If the safety after-filter itself develops a tear or leak, the pressure difference across the safety after-filter decreases. Either condition causes alarms to be triggered and the system is powered down, thus preventing contaminated air being exhausted.

Abstract: An air filtration system that reduces positive and/or negative resistance by eliminating duct work to and from the to-be-filtered room. The air filtering system forms a common wall with the to-be-filtered room permitting dirty air to move easily and quickly through to the cleaning process. Through the use of vertical baffles and reverse pulsed jets, debris is easily and efficiently collected in drawers or trays. Because of the modular design of the invention, it is easily placed on a trailer and transported to a locale which is to be cleaned within a flexible room (i.e. bridges, building exteriors, airplanes, etc.).

Abstract: Disclosed is a parallel filtering circuit comprising at least two filters of a depth layer filtering type connected in parallel to each other in conduits showing different fluid resistances respectively, whereby, even when both the filters are clogged with particles of contaminants, the total flow rate may not decrease sharply, so that a preventive measure can be immediately taken before a fatal situation occurs. An orifice may be connected at its inlet to the outlet of the conduit having a smaller fluid resistance and at its outlet to the outlet of the conduit having a having fluid resistance.

Abstract: A supplied air respirator system is described for use in an enclosed work area wherein an asbestos abatement action is being conducted. A conventional air filtration unit is provided and which has its discharge side in communication with a clean air box. Positioned within the clean air box is a HEPA filter intake box having a HEPA filter contained therein with the discharge side thereof being connected to one or more air pumps. The discharge side of each of the air pumps is connected to an air cooler or heat exchanger coil unit, filter system and hose reel assembly. The heat exchanger coil unit cools the compressed air with the filter systems positioned downstream thereof being utilized to remove any excess condensation from the cooled air.

Abstract: An oil separator operates to remove oil entrained in a refrigerant being circulated in a refrigeration system, especially a system using a screw-type compressor. The oil separator generally comprises a vessel having a chamber therein and a perforated plate on which oil coalescing elements are mounted divides the chamber into a lower primary oil separator section and an upper secondary oil separator section. A mixture inlet pipe extends through a side of the tank into the lower section for admitting a pressurized mixture of refrigerant and oil. A refrigerant gas outlet port is provided in the upper section for expelling refrigerant from which the oil has been separated. An oil outlet port is provided in the lower section for expelling oil collected in an oil sump at the bottom of the lower section.

Abstract: A hopper gas distribution system (10) is provided for dispersing particulate laden gas in an equal flow rate around or into a plurality of filter bags (16) maintained in a bag house above a hopper housing (12). Particulate laden gas enters the hopper housing (12) through an inlet conduit (18) and is directed in an upward vertical direction (24) by a plurality of turning vane members (30) mounted within the hopper housing (12) in a longitudinally displaced as well as vertically displaced manner, each with respect to the other. Below the turning vane members (30) and the inlet conduit (20) is mounted a plurality of blocking vane members (42) secured to opposing transverse sidewalls (32 and 34) of hopper housing (12). The blocking vane members (42) create a false bottom floor which further impedes particulate laden gas from passing down into a lower section of the hopper housing (12).

Abstract: The present invention relates to an apparatus for filtering solid matter from a gas. It particularly relates to improvements in bag house type filters for use in cleaning gas streams. There is provided a gas filter apparatus consisting of, in combination, a chamber having a top, base, and side walls, a conveyor tube for passing the solid laden gas into the chamber and centrally of a partition wall dividing the chamber into upper and lower compartments, gas and solid matter exit ports on the conveyor tube, in the lower compartment only, for use in distributing the gas and solid matter from the conveyor tube and directing at least a portion of the solid matter toward the base by gravity. The partition includes a number of openings communicating the upper and lower compartments, and filter tubes are provided in the lower compartment covering the openings.

Abstract: A flour recycling system includes a compressed air and vacuum head placed over a bakery product conveyor line. Flour is removed from the product units and is conveyed through a vacuum hose to the inlet of a remotely located dual stage separator in which the flour with entrained dough particles is subjected to a two-stage vacuum induced centrifugal separating process. Cleansed flour is drawn by vacuum through two fine mesh sifter screens into two reclaimed flour tanks each containing a vortex eliminator and each having an air release bag. Reclaimed flour is delivered to storage receptacles beneath the tanks through elongated flexible chutes which can be tied off and closed at desired elevations. The tanks, their air release bags and flexible chutes can be individually vacuum cleaned without shutting down the system merely by stopping the operation of one blower while continuing to operate the other blower of the dual blower system, one for each tank.

Abstract: A Coanda-type airmover 16 is mounted vertically on a hollow base 10 to draw air through the base from filtering means comprising a pre-filter 26 and an absolute (HEPA) filter 28. The airmover discharges the filtered air upwards. The two filters are stacked on the base for air to be drawn downwards through them from an inlet duct 30 leading horizontally from a contaminated-air inlet 32 of the device. An air tight cover 34 can be secured to cover the inlet 32 of the duct when the equipment is not in use, enabling contaminated filters to be left in place during transportation. The portable device may be used for withdrawing and cleaning fibre-laden air from a working space where asbestos stripping is taking place.

Abstract: A vacuum cleaner including a dust chamber, a vacuum chamber and a source for producing low pressure in the vacuum chamber, wherein the dust chamber and the vacuum chamber are partitioned by a first filter unit, and wherein the vacuum chamber is provided with a secondary filter unit in which at least one filter element is suspended from the ceiling of the vacuum chamber radially thereof. A rotary shaft is provided at the center of the radially arranged filter elements, the rotary shaft radially supporting vibrating vanes, each of which is designed to vibrate each filter element of the secondary filter unit on its inner peripheral portion, thereby causing the dust entrained therein to fall off by vibration. The rotary shaft is additionally provided with a single vibrating arm horizontally extended so as to vibrate each filter element of the secondary filter unit on its bottom portion.

Abstract: An apparatus especially suitable for filtering out a particulate material from a carrier fluid such as flue gases is disclosed herein. This assembly utilizes a main vessel defining an interior compartment and having an inlet and separate outlet. A number of filter assemblies are disposed within the vessel compartment and supported therein in spaced relationship with one another and with the vessel itself by means of a single tubular member which also serves as a discharge pipe between the filter assemblies and the vessel's outlet.

Abstract: An air filter unit has a housing including a plurality of separate filter element chambers disposed side by side and each including openings to an elongated air inlet chamber. Each of the filter element chambers includes a porous media filter element for receiving a portion of a material laden air flow stream entering the housing in such a way that the lower velocity portions of the flow stream are diverted into the respective filter element chambers and forced to flow in a vortical manner to provide inertial separation of material prior to flow of air through the filter elements. The inlet air flow is directed against a wall of the inlet chamber at the end opposite the inlet end of the inlet chamber so that higher velocity portions of the inlet air flow stream impinge the wall to separate particulate material entrained with the higher velocity portion of the flowstream.

Abstract: A vacuum cleaner and refuse and debris collection and disposal device and system utilizing a vacuum cleaning unit, with intake for both wet and dry materials, utilizing a motor-driven blower to create a vacuum in a sealed vacuum chamber and a separate internal debris collection container which is removable without disturbing the sealing properties of the vacuum chamber. The container is alternatively emptyable or disposable, thereby providing minimal interruption in the operation of the vacuum cleaner unit, no relocation of the unit when dumping is necessary and the use of replaceable, or disposable internal collection containers subject to wear and tear without disturbing the sealing properties of the vacuum chamber.

Abstract: An improved low pressure filtration apparatus for the collection and removal of particulate matter form an air stream which includes particulate matter wherein the apparatus includes sequentially, an intake hose for the introduction of the air stream including said particulate matter into the apparatus, a first enclosed collection chamber having an intake apparatus for connection to said intake hose and a removably secured outlet apparatus for removal of a portion of said particulate matter collected in said first collection chamber and an exit apparatus from the first collection chamber for the air stream and a portion of the particulate matter, a second enclosed collection chamber having an intake apparatus for introducing the air stream and a portion of the particulate matter from the first collection chamber, an exit apparatus for the air stream and a portion of the particulate matter from the second enclosed collection chamber, a plurality of vertically disposed filter bags disposed between the intake an

Abstract: Particle-laden gas passes downwardly through an inlet duct into inlets of several wedge-shaped deceleration chambers formed by vertical plates radiating from a central region below the bottom of the inlet duct. The inner ends of the plates and the inlet of the chambers are vertically below the bottom of the inlet duct. In each chamber the gas first proceeds towards a particle exit at the bottom of the chamber, then reverses direction and passes upwardly into filter units above wider parts of the chamber, depositing some heavy particles near the particle exit. To purge the chambers and filter units, a suction device is connected to an outlet duct and one or more inlets to the chambers are closed off from the inlet duct simultaneously with the particle exit(s) of the same chamber(s) being connected to the outlet duct.

Abstract: In an apparatus for separating suspended particles, such as ash, from stack gas, consisting of a coarse separator, a take-up container for particles removed from suspension in the coarse separator, a fines separator for the partially-cleaned gas output of the coarse separator, and a stack for the cleaned gas output of the fines separator, a new arrangement is disclosed for maintaining the temperature of the dirty stack gas within the apparatus above its dew point so as to prevent the deposition of soot (sooting-up), such arrangement being the construction of the apparatus in such a way that the coarse separator, the fines separator and the outlet stack form an integral structural unit which sits upon the take-up container, which is supported by feet set upon a foundation. In such arrangement, the heat of the hot, suspended ashes deposited in the take-up container is transferred to the take-up container, and thence, to the elements of the integral structural unit.

Abstract: A self cleaning industrial dust filter includes a housing divided by a tube sheet into an upper clean air chamber and a lower dirty air chamber. Pleated fiber cartridge type filters are supported in the lower chamber from the tube sheet and the interior of the filters communicate with the clean air chamber through openings in the tube sheet, one for each filter. The lower chamber is formed as a plurality of panel venturis which converge downwardly from the lower end of the filters to a narrow throat. A clean air outlet connects with the upper chamber and a dirty air inlet with the lower. Downwardly directed jet nozzles are positioned in each venturi to induce reverse flow through the associated filters, remove accumulated particulates and conduct them to a take out at the base of the lower chamber.

Abstract: Effluent with entrained particles is drawn through a filter module (A) by an exhaust blower (B). The filter module includes an inertial separator (C) for providing an inertial separation of particles from the effluent air and a plurality of filter cartridges (D) which allow air to pass therethrough but not particles. A plenum E interconnects the filter cartridges with the exhaust blower to channel the filtered air from the filter module to the exhaust blower. A flow controller (F) controls the flow rate of air through each of the filter cartridges maintaining it substantially constant. The flow controller includes a flow rate sensor for sensing the flow rate through each filter cartridge and a butterfly damper blade for selectively restricting the plenum to maintain the flow rate substantially constant. A filter cartridge cleaner (G) is selectively actuated when the flow controller is unable to maintain a preselected minimum flow rate.

Abstract: This invention relates to a device at a dust filter for cleaning a gas flow from dust. The dust filter consists of an electrostatic precipitator or fabric filter (bag filter) and comprises a filter chamber (10) with gas inlet (12) and gas outlet (13). At the gas inlet a precollector (30) in the form of a louvre collector (31) is located for separating coarse dust, i.e. dust with a diameter exceeding 50-75 microns. In the order to obtain good collection at the louvre collector (31), the collected dust is evacuated by means of a partial gas flow, which is passed to a dust hopper (34) and a dust discharge unit (35). According to the invention, the dust discharge unit (35) comprises a cyclone collector (36), the inlet portion (37) of which is integrated with the dust hopper (34), and the outlet portion of which or central pipe (38) is formed with a passageway (39), the mouth (40) of which is located in the filter chamber downstream the louvre collector.

Abstract: Apparatus for filtering air laden with dust or other particulate matter including: a filtering area, an air velocity dissipation zone above the filtering area, a lower tube sheet mounted above the dissipation zone and forming a partial boundary therewith, an air plenum mounted above the lower tube sheet, the air plenum including an air inlet for receiving dust laden air, an upper tube sheet forming an upper boundary of the air plenum, the lower tube sheet including a plurality of holes, the upper tube sheet including a plurality of holes vertically aligned with the holes in the lower tube sheet, a plurality of clean air outlet tubes having upper end, main body and lower end portions, the upper end portions being mounted within the holes in the upper tube sheet, the main body portions extending through the holes in the lower tube sheet, the lower end portions extending beneath the lower tube sheet and ending in a horizontal plane at the interface between the dissipation zone and the filtering area, a plurality

Abstract: An air filter assembly (10) is disclosed which includes a dirty air chamber (22) having an air inlet (20) and a plurality of clean air outlets (34). In fluid communication with each air outlet (34) in the dirty air chamber (22) is a pleated media filter element (32) positioned so as to be suspended in a cantilever manner at an acute angle with respect to a horizontal plane. A distribution space (33) for reducing entering air velocities is created by the inclined uppermost filter elements (32) and the horizontal plane of the top surface panel (16). The lowermost portion (25) of the dirty air chamber (22) provides a collection area for particulate matter removed from the filter elements. The lowermost portion (25) includes a sloping surface (24) constructed of a material which flexes in response to pressure increases within the chamber (22).

Abstract: Commercial pleated paper filter elements are applied at full rated gas flow capacity in applications requiring removal of large quantities of particulate matter from large volumes of flowing air or other gas by combining the elements as second stage filters with a primary stage cyclonic separator and operating both under vacuum conditions. Compact construction is provided by disposing the filter elements in the center of a vortex of the cyclonic separator and by providing a storage manifold within the cyclonic separator for compressed gas for pulsed back flow cleaning of the filter elements.

Abstract: An air cleaning method and apparatus is disclosed in several embodiments. In one set of embodiments, there is described an air cleaning method and apparatus in which air to be cleaned is drawn toward and through a filter in a particular direction. Periodically, reverse pulses of air are directed through the filter in a direction opposite to normal flow to interrupt the flow of air and to dislodge collected particles from the uncleaned air side of the filter and to enable migration of the particles toward the downstream lower end of the filter.In accordance with other embodiments of the present invention, there is described the addition of inertial precleaner devices located proximate the unfiltered side of each filter for inertially separating heavy particulate matter from the uncleaned air prior to filtration.

Abstract: A vortical-type separator for removing from the gas stream suspended particulates present in the gas stream has an internally generated scavenging gas flow and a pulse jet system for cleaning scavenging gas filter elements. The separator has two or more conduits that are coaxially positioned with an annular clearance at their ends. A gas swirl device creates a swirling motion, causing heavier particulates to be discharged out the annular clearance or ejection port into a scavenging gas plenum. A flow path is created between the scavenging gas plenum and the outlet of the separator, with the pressure differential between the outlet and the ejection port causing scavenging gas to flow to the outlet. A frame is mounted in the flow path over which a bag filter is secured. The dust-laden scavenging gas flows through the bag filter and out the outlet. A nozzle is positioned at the mouth of the bag filter for periodically discharging a pulse of clean gas into the bag filter reverse to the flow of the scavenging gas.

Abstract: A heavy duty automotive air cleaner for use in environments having high contaminant concentrations includes a housing carrying a vane-type centrifugal separator and a removable filter cartridge. The removable filter cartridge includes a pleated paper filtering medium and a fibrous, depth-type filtering medium. A pair of flow paths are defined through the housing between the inlet and outlet thereof. One of the flow paths extends through the depth-type media and the pleated paper medium, and the other flow path extends through the centrifugal vane-type separator and the pleated paper medium. The depth-type fibrous medium is placed upstream from the pleated paper medium, and is adapted to remove relatively fine particles from the incoming air stream as the heavier particles are centrifuged outwardly by the vane-type separator.

Abstract: Apparatus and method operating at relatively low pressure drop and low initial velocity for removing pollutants down to sub-micron sizes from gas streams comprising a nozzle means accelerating the gas flow and impinging the pollutants upon a plate for removal of a major portion of pollutants and then passing the gas stream through fabric filters for removal of substantially all of the remaining particulate pollutants.

Abstract: A cell filter apparatus of the bag or stocking type having a housing is disclosed. A gas deflector and boundary wall between a raw gas duct and a dust chamber upstream from the filter cells form a tapering duct having an outlet passage for coarse dust particles at its narrow end. Either the deflector or the boundary wall is pivoted so that the size of the outlet passage can vary so as to remove coarse dust from the outlet passage. A gas blast for cleaning the filter cells in a direction to move the pivoted element so that the outlet passage is varied and cleaned.

Abstract: An industrial loader vehicle, handling both wet and dry materials, has a single engine driving the vehicle to a pick-up site, powering all of the components to load the vehicle at the site, driving the vehicle to an unloading site and dumping the materials as desired at the unloading site. A powerful blower develops a high velocity air stream through a pick-up inlet conduit and a collector chamber tiltable on the vehicle for easy dumping of the collected material. A swingable and tiltable boom mounted on top of the collector presents the conduit for easy access to material located around and above the vehicle. The high velocity air stream sweeps the material through the conduit into the top of the collector chamber where it drops to the bottom of the chamber. The blower and surrounding environment are protected from materials entrained in the air stream by bag filters and cyclone separators mounted on the front end of the collector to tilt therewith.

Abstract: The present invention relates to a filter apparatus for the purifying of gases, having at least one filter space which has at least one upper inlet and one lower inlet for a filter medium containing solid particles which passes through said space, the gas to be purified flowing through said space in countercurrent to the filter medium. In this filter apparatus, at least one removing device which moves relative to the filter space, for instance a scraper, is provided at the outlet for the filter medium, said device moving through a cone of the filter medium which forms at the outlet so as to remove, in each case, at least a part of the filter medium from the cone.

Abstract: A self-cleaning air cleaner having a housing with a first partition dividing the interior of the housing into a first generally vertically elongated chamber and a second generally horizontally elongated chamber. The partition lies in an oblique plane at an angle with respect to the elongation axes of the first and second chambers and has an opening which provides fluid communication between the first and second chambers. A fan or blower is provided within the housing for drawing air through the housing from a dust-laden air inlet to a clean air outlet. A filter is mounted within the housing and disposed to filter the air passing through the opening in the partition. A reverse pulse air valve is disposed within the housing to direct a pulse of cleaning air into the filter to dislodge the dust collected thereon. An electrical control circuit is provided for actuating the reverse pulse air valve which is connected to a suitable source of compressed air.

Abstract: There is disclosed a wet-dry vacuum sweeper including a waste receptacle mounting a separator for receipt of air and entrained solids from a sweeper head for separation of the larger solids by centrifugal separation and passage of the exhaust flow directly to atmosphere or, at the selection of the operator, through a filtration system including upstanding tubular filters for further filtration of smaller particles from the flow stream.

Abstract: A separator is disclosed for removing from a gas stream suspended particulates such as liquid droplets and finely divided solids. A housing chamber encloses a tube that contains a gas swirl device for imparting a swirling motion to the gas stream entering the inlet of the tube. A separator conduit is axially aligned with the tube and has its upstream end coaxially located in the downstream end of the tube, defining an annular ejection port. Suspended particulates and scavenging gas are discharged into the chamber through the annular ejection port. The downstream end of the separation conduit is in communication with the outlet of the housing. A passage is provided for returning the scavenging gas to the main gas stream at the outlet of the housing. A separation device is located in the passage to cleanse the scavenging gas of suspended particulates prior to recombination with the main gas stream.

Abstract: An apparatus for the separation of particles from a gas of the type which has filter elements disposed around a drum located in the center of a housing with a shutter mechanism. The improvement of the present invention also relates to an apparatus which allows separation and emptying of filter elements by the shutter mechanism and particle separation without venting of particles to the atmosphere. The apparatus is particularly useful for instance, for asphalt mixing plants, stone quarry or foundry dust separation and collection.

Abstract: An improved multistage particle separator apparatus including a cyclone separator, a linear separator, a pair of vertical channels carrying exit airstreams from said linear separator, and a pair of air filter chambers on each side of said linear separator. A portable multistage separator including integral means for collecting the separated particulate material and for supporting the separator during movement.

Abstract: The dust collecting efficiency of a gravel bed filter system in which a plurality of filter modules receive dirty gas from and dischage backflush gas and collected dust into a plenum chamber is enhanced by continuously drawing gas from a downstream end of the plenum chamber, passing the withdrawn gas through a cyclone separator, and returning the gas to the upstream end of the plenum chamber.

Abstract: A vertically oriented, sheet metal enclosure includes a frusto-pyramidal lower section forming a hopper for separated particulate matter from an air stream which enters a middle section from a downwardly and inwardly inclined inlet duct fixed to one side of that section at the upper end, causing impingement of the airborne particles against the side of the hopper to effect a swirling action to the air stream. An array of laterally spaced, inclined baffle plates at the upper end of the middle section separates the middle section from an upper section which carries tensioned tubular filter bags. An enclosure cover defines an outlet opening feeding to a cover mounted blower.

Abstract: An air filter for use on a truck or similar system includes a cylindrical side wall which is an integral part of or adapted to be mounted on a tank, such as the fuel tank of the truck as the principal means of support. The housing includes a front wall with a removable closure for permitting access to the interior to facilitate removal or replacement of the filter element without having to remove the inlet or outlet air conduits.

Abstract: An apparatus especially suitable for filtering out a particulate material from a carrier fluid such as flue gases is disclosed herein. This assembly utilizes a main vessel defining an interior compartment and having an inlet and separate outlet. A number of filter assemblies are disposed within the vessel compartment and supported therein in spaced relationship with one another and with the vessel itself by means of a single tubular member which also serves as a discharge pipe between the filter assemblies and the vessel's outlet.