Abstract: The present invention provides a cyclonic air cleaning device having a self cleaning, replaceable cartridge filter. The device essentially includes a barrel having a vortex tube concentrically positioned therein and a cylindrical, pleated filter cartridge concentrically positioned within the vortex tube, and a cone portion removably attached to and extending downwardly from the bottom of the barrel. The cone funnels debris to a collection receptacle securely attached to the bottom thereof. The filter is held in place by an upper plate fixedly secured to the vortex tube, a lower plate, and a T-bar extending centrally through the two plates and filter. A wing nut engages the bottom end of the T-bar in abutting relation to the bottom plate to hold the filter in place.

Abstract: The air filtering apparatus has a perimeter mounting frame for placement within a grid opening of a ceiling structure. Within the mounting frame is a filter cartridge having upper and lower surfaces. Each such surface has a perimeter border area. An upper assembly is removably fastened to the perimeter mounting frame and includes a plenum perimeter wall having a lower edge for pressing downwardly to form a seal impervious to air along the perimeter border area on the upper surface of the filter cartridge. A lower assembly is removably fastened to the perimeter mounting frame for pressing upwardly against at least a portion of the perimeter border area on the lower surface of the filter cartridge. Either the upper assembly or the lower assembly may be removed to permit filter cartridge replacement either from above or below the perimeter mounting frame without removing the perimeter mounting frame from the grid opening of the ceiling structure.

Abstract: An Analytical Glove Box System has a sealed instrumentation enclosure, a ve box having an injection port coupled to the instrumentation and an air lock through which sample vials can be passed from outside into the glove box. A pump is provided for withdrawing gas from the glove box enclosure through a filter system so that the glove box is maintained at a negative pressure with respect to ambient. Toxic chemical samples can thus be safely handled by an operator and analyzed with sophisticated instrumentation without the risk of contamination. All effluent from the glove box is filtered before release to ambient, leakage from the glove box is further eliminated due to the negative pressure differential maintained, and the instruments are isolated from the potentially contaminated environment of the glove box. The system further provides the ability to conduct highly toxic chemical analysis in field locations since it is portable (including air transportable) and is easily decontaminated.

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: A clean air facility including a structure made of horizontal and vertical pipes secured together at their ends. The pipe structure includes horizontal pipes upon which blowers are secured. A clean pan is secured above the blowers and includes holes in a bottom of the pan through which air is drawn to the inlet of the blower. A cover on the pan includes slots along one edge through which air is drawn by the blowers. The outlet of the blowers are connected by ducts to an air feed covering secured to a HEPA filter through which air is blown by the blowers. The clean air facility is enclosed by vinyl panels on the sides, back, top and front. Each of the blowers, the pan, the side panels and the front panel are secured in place by VELCRO.RTM. fastener connections.

Abstract: A portable air cleaner designed to remove fine particles and unwanted gases from a room to provide for a healthier and cleaner environment. The portable air cleaner includes a high air volume circulating design and operates quietly and efficiently. The portable air cleaner is designed to minimize the unsettling of particles which have settled out on the floor about the base of the air cleaner so as not to aggravate the particle concentration within the room environment. The portable air cleaner includes a particle filter designed to have ultra high efficiencies with respect to particle removal. Disposed coterminous to the particle filter to remove unwanted gases from the filter air to provide for improved cleaner and healthier environment.

Abstract: A modular filtration system for cleaning HVAC ductwork includes first and second modular assemblies containing a plurality of filters. The modules can be easily transported into a site and connected to one another and to the ductwork. The system includes a plurality of wheels and external assembly protruding from the housing to assist in wheeling the housing up and down stairs.

Abstract: A smoke processor including a housing having a recess, an exhaust fan arranged with the housing, a filter mounted within the housing and located above the exhaust fan, a smoke processing container fitted in the recess of the housing, a flexible pipe connecting the smoke processing container with the filter, a cigarette lighter mounted in the smoke processing container, a linking rod having an upper end pivotally connected with the smoke processing container, a rotating disc rotatably connected with a lower end of the linking rod, and a fixed disc engaged with the rotating disc and mounted within the housing, whereby the smoke exhaled by the smoker can be effectively purified thus preventing air pollution,

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: A method is disclosed for cleaning HVAC ductwork, including the steps of transporting first and second modular filter assemblies to a site, connecting them in sealed fluid communication with one another and to the ductwork, drawing fluid through the filtration system from the HVAC ductwork, exhausting filtered fluid from the filtration system and tilting the housing so that any stairs present at the site bear against a bearing surface of an external conveyance assembly as the modules are transported up and down stairs.

Abstract: Disclosed is a dust collector that is essentially modular in structure, thereby making it easy to transport, position and assemble by the user himself or herself. This dust collector includes one or more filter modules, a fan module operatively connectable to one end of the filter module(s), an end plate for closing the opposite end of the filter module(s), and optionally a silencer module intercalatable between the fan module and the filter module(s) to reduce the noise of the fan. In use, the dust collector can be easily upgraded whenever required by merely changing the motor, fan wheel and inlet of the fan module and/or adding one or more filter module in order to increase the filtering surface area.

Abstract: A device for separating foreign material from air. A main frame includes a chamber having one or more inlet tubes, an air outlet, and a foreign material outlet. An air pump forces the air including the foreign material into the chamber via the inlet tubes. Guides extend between the inlet tubes and the foreign material outlet. The air outlet is positioned between the inlet tubes and the foreign material outlet and causes the air within the guides to change direction exiting the chamber while the foreign material continues to the foreign material outlet. A collector receives the foreign material.

Abstract: A method of converting a dehumidifier (10) having a base portion (16), a center portion (18), an upper portion (20), a desiccant container (62), and receptacle container (36), to an air purifier (12). The method includes removal of the desiccant container (62) and replacing it with an air filter cartridge (94). The invention is also directed to the air purifier (12) and air filter cartridge (94) for converting from a dehumidifier (10) via the air filter cartridge (94).

Abstract: An air filtering apparatus and filter mounting device for sealing a filter within an air filtering apparatus, utilizes at least one cam surface to force a filter to compress a gasket to provide an effective seal between the air filter and its associated air outlet.

Abstract: The air filtering fixture is for suspension from the ceiling of a room to filter out unwanted tobacco smoke. The fixture has a housing formed of peripheral walls defining a generally vertical air path. The housing has an upper compartment portion and a lower flared hood portion. An air filter assembly is located within the upper compartment and a lighting assembly is situated within the hood portion below the filter assembly. At least one fan assembly is located above the filter assembly in the upper compartment. The fixture intakes air through a bottom opening in the flared hood portion and propels the air as an air stream upwardly out of a top opening in the upper compartment and toward the ceiling. A toroidal air movement about the housing is facilitated which induces unfiltered air laterally external to the housing to move downwardly from above the housing and enter the bottom opening to be filtered. An access opening in the housing permits easy filter replacement.

Abstract: A method and apparatus for increasing the yield of an air-drying process with the aid of a dehumidifier 2 and a condenser/heat-exchanger 3 involves delivering wet regenerating air exiting the dehumidifier to one side of the condenser/heat-exchanger so as to deliver energy to the process air entering the other side. Condensation deriving from the regenerating air is collected and carried away, and the heated, dried process air 21 is delivered to the dehumidifier in which moisture is extracted from the air and the air further dried. The departing wet regenerating air may, after its delivery process, be led to the room, atmosphere or the flow of process air.

Abstract: A portable and compact room air purifier having an internal filter element through which air is drawn by a centrifugal fan and wherein the air is discharged generally uniformly and radially by passing between at least one generally arcuate scroll and a surrounding deflector. The purifier is automatically deactivated in the event of destruction or removal of the filter housing.

Abstract: A modular air cleaning system having at least one filter module having a closed plenum box provided with male and female air flow porting structure, one of which porting structure provides an air inlet and the other of which provides an air outlet, each of the porting structures is in substantially cylindrical form and projects outwardly from the box and each has a section of substantially the same diameter lying adjacent the box, a shoulder on each of the sections peripherally circumscribing the same at a short distance outwardly from the box and adapted to engage end portions of a flexible hose for preventing its withdrawal from the sections, the male porting structure having a reduced diameter segment lying outwardly of the adjacent section and adapted to telescope within the female porting structure of another plenum box, and an annular seal within the female porting structure adapted to engage the segment and form a substantially gas-tight seal thereagainst.

Abstract: A mist collector cartridge for collecting airborne liquids, and more particularly, a filter media having vertically oriented interconnected pleats treated with a low surface energy material to facilitate agglomeration and drainage of liquid which accumulates on the inner and outer surface of the filter media.

Abstract: An improved fume exhauster includes a housing forming therein a receiving space in which a suction and filtration unit is disposed. Fastened to the lower portion of the receiving space of the housing is a bottom plate having a fume sucking hole and a plurality of air exit holes arranged at a predetermined interval along left, right and front edges thereof. The fume is sucked in through the fume sucking hole of the bottom plate and is subsequently filtered by a filtration member. The filtered fume (clean air) is caused to pass through the air exit holes to form an air curtain under the fume exhauster. The air curtain acts to prevent the dissipation of the fume so as to reinforce the sucking and exhausting effect of the fume exhauster.

Abstract: A cleaning device for a clean room has at least two filter-fan units each comprising a filter and a fan. Connecting elements connect the filter-fan units to one another to form a self-supporting construction unit. Each filter-fan unit comprises a housing having profiled elements for engaging the connecting elements in the form of bars or angled pieces. The connecting elements can be T-shaped or cross-shaped. The construction units can be supported on supports on the floor or suspended from the ceiling.

Abstract: A filter for washing and retaining exhaust gases in motor vehicles includes one or more chambers formed by either a single chamber with a plurality of sections formed by partitions therein or by separate chambers. Each chamber is provided with an exhaust gas inlet pipe for exhaust gases that have already been partially filtered in a previous chamber or section, or, in the case of a first chamber or section, exhaust gases coming directly from the engine of the motor vehicle. The gases are injected into a filtering liquid by diffusing pipes in the chambers. The exhaust gases are filtered by the filtering liquid as they flow through the liquid, passing afterwards to a subsequent chamber or section, or to the atmosphere through an exhaust outlet.

Abstract: A ceiling mounted air purifier that provides a high velocity, multi-directional air exhaust pattern that distributes filtered air to all areas of a room which includes a plurality of filters and centrifugal fans. The centrifugal fans are substantially surrounded by baffles which form generally equally spaced exhaust outlets.

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: A fail-safe air handling and safety system is described. The system is for use by workers during removal of hazardous substances, such as asbestos, lead, and toxic chemicals, from within a structure. The structure has a containment area with air exhaust openings for maintaining the containment area at negative pressure with respect to ambient. A decontamination unit sealingly connects to a doorway in the containment area and provides for an air locked entryway for the workers. For convenience of on-site erection, the decontamination unit is modular with the modules sealingly connected in a series with each module connected the one to the other. Unique air inlet diffusers provide inflowing makeup air, and the devices are interlocked so that, upon loss of negative pressure in the containment area, a standby air filter becomes operational.

Abstract: An air filtering apparatus includes a fan body having an air intake and an air outlet. There is a fan within the body which draws air into the intake and forces it out of the outlet. There is at least one air filter between the intake and the outlet. A plenum chamber is connected to the fan body about the air outlet. The plenum chamber is a flexible bag of a sheet-like material which is inflated by air forced out of the outlet of the fan body. At least a portion of the plenum chamber is an air diffuser for air exiting the apparatus. The diffuser is more permeable than the filter.

Abstract: The improved carpet cleaning machine, intended for use with "dry" carpet cleaning systems using dampened granules or particles, can be used in either of two modes. One involves carpet "brushing" for dirt removal by urging particles into the carpet and along the fibers. The other involves later vacuuming for particle removal. To facilitate the latter, one embodiment of the machine has first and second particle-removing media such as a concentrically-mounted cyclone separator and conical screen filter, respectively. The separator has air flowing through it downwardly along a vortical path and then upward, such air flow often carrying along a few particles. Such high-velocity particles impinge on the outer surface of the screen filter and many particles adhering to such filter are dislodged. The filter is said to thereby be "purged" or cleaned. There may also be a third medium and even a fourth medium to remove very fine particles before the air is expelled back into the room.

Abstract: A device for filtering air comprising a filter housing having an air inlet for directing flow of air drawn into the housing from atmosphere and an air outlet for directing flow of air exhausted from the housing to atmosphere, the air drawn into the housing carrying air contaminants therewith. A plurality of cylindrical filter stacks having substantially parallel longitudinal axes are disposed in the housing. The filter stacks have outer cylindrical filter walls and inner passages extending therethrough along the longitudinal axes. The filter stacks are capable of filtering the air drawn into the housing by trapping the air contaminants in the filter walls when air is drawn through the filter walls into the inner passages.

Abstract: An improved machine convertible for brush-aided cleaning or vacuuming includes a pair of powered brushes counter-revolving for stroking solvent-dampened carpet cleaning particles through the carpet and along carpet fibers during initial cleaning. A separately-powered pod is detachable from the machine during brush-aided carpet cleaning and attached to a machine-mounted vacuum nozzle for carpet vacuuming to pick up the dirt-laden particles. The pod has first and second media selected to remove particles of differing sizes from air flowing through the pod. During initial carpet cleaning when vacuum is not needed, the pod may be detached and used in another area for hand-vacuuming carpeted stairs and other "small-area" places.

Abstract: An air cleaner assembly for capturing and filtering fumes is provided which comprises a housing having an inlet and an outlet, a pair of filter cartridges supported therein and a blower. A channel and baffle assembly direct the flow of air drawn into the housing in a vortical pattern around the filter cartridges to separate heavier particles in the air and to efficiently draw the air through the filter cartridges. The separated particles collect in a pair of dust trays that are provided with flow directional lips to prevent the vortical air flow from disturbing the deposited particles. A backflushing assembly cleans the filter cartridges of the particles that are collected thereon by pulsing the particles away with a blast of air directed through the entire length of the filter cartridges.

Abstract: An air handling and filtering system is provided for with conventional textile machines. The apparatus includes a common vacuum system for drawing first and second independent airstreams through the textile machines. A filtering system operates with the vacuum system to filter the useful white waste fiber material from all of the first airstreams. Individual filtering devices are provided for each textile machine and are housed in end-housing units disposed as one end of the textile machine. The individual filtering devices filter generally waste fiber material from the second airstreams drawn through the textile machines. The individual filtering devices can be isolated from the common vacuum system so that the individual waste fiber filters can be cleaned without stopping or otherwise affecting the critical first airstream so as not to detrimentally affect yarn formation at the spinning stations of the textile machines.

Abstract: A generally flat air filtering device for an optical disk drive is disclosed. As air is sucked into the disk drive via an inlet of a filter, a filter mat included in the filter removes dust and other impurities from the air. The purified air comes out of the outlet of a tube and then enters and cools an optical disk unit. The filter mat has a generally V-shaped section and, therefore, has a filtering area great enough to enhance efficient dust collection as well as the service life of the filter. To isolate the purified air from surrounding dust-containing air, an endless projection or rail is provided on the tube to bite into the filter mat which is flexible.

Abstract: A fume extractor comprises a housing and a predetermined number of suction devices. The housing has a bottom board provided with fume sucking ports. Each of the suction devices comprises a motor provided with a rotating shaft upon which a wind impeller is mounted in such a manner that the wind impeller is corresponding in location to the fume sucking ports of the housing. Each of the suction devices is further provided with a filtration member having a top segment and a bottom segment which are fastened respectively to a top board and a bottom board of the housing. The filtration member has an inner wall that is located at a distance from the wind impeller. The housing is further provided with a plurality of exhausting holes.

Abstract: A clean air apparatus includes a housing having an opening through which a carrier housing semiconductor wafers is supplied into the housing and an I/O port for supporting the carrier and a furnace for treating the wafer, provided in the upper portion of the housing. The carriers are at the same time supported by a first carrier stage provided in the upper portion of the housing and supported by a second carrier stage provided in the lower portion of the housing. The carrier or carriers are selectively moved between the I/O port and the first stage, between the I/O port and the second stage, and between the first stage and the second stage. A clean air is applied to the wafers in the carriers supported by the I/O port, the first stage and the second stage.

Abstract: A disposable canister containing a HEPA filtration mechanism is used in conjunction with a removably mounted vacuum motor assembly. The vacuum motor assembly draws particulate-laden air, including harmful airborne contaminants, into an inlet opening of the canister by a disposable vacuum hose. The inlet opening is made of a magnetically attracting material. The particulate-laden air is then filtered through the HEPA filtration mechanism prior to exiting from the canister as non-contaminated air. Upon termination of the vacuum force on the inlet, a hinged magnetic flap seals the inlet to the canister. The immediate and complete sealing of the inlet by the magnetically biased flap assures against escape of harmful contaminants from the canister.

Abstract: A self-contained, portable air purification device is designed to continuously cleanse airborne particulates which include infectious respiratory organisms such as tuberculosis bacilla. Contaminated air is drawn into the device about 360.degree. from the breathing or working zone to capture the airborne infectious respiratory organisms. The airborne microbial particulates are extracted by a high efficiency particulate air filter capable of eliminating 99.97% of all airborne particles that are 0.3 microns in size or larger. The filter is permanently sealed within a filter cube that is disposable in its entirety for replacement purposes. The filter cube is releasably secured within the device to provide a leak-free air tight seal eliminating any potential air bypass. Clean filtered air is discharged at the bottom of the device in a 360.degree.

Abstract: A portable vacuum and air filtration unit, comprising: a plurality of separately transportable modules and a means for locking the modules together during use, an air inlet located in one of the modules, a debris screen and a means for receiving debris stopped by the screen located in one of the modules, an electrostatic filter located in one of the modules of some embodiments of the invention, a bag filter assembly located in one of the modules, a HEPA filter assembly located in one of the modules, and a means for drawing a substantial volume of air through the inlet, screen, electrostatic filter, bag filter assembly and HEPA filter assembly.

Abstract: A separator assembly includes a tubular bag separator having a cylindrical casing and supported in an axially vertical position by an upright stanchion mounted on an associated support base. The separator is used in combination with a disposable drum positioned under the separator. A manually operable jack elevates the separator and maintain it in a raised position above the height of an associated drum to facilitate drum removal and replacement. The stanchion is releasably retained in vertical position and foldable to a horizontally disposed position to facilitate transporting and storing the separator assembly.

Abstract: A combined indoor fountain-air cleaner. The fountain-air cleaner comprises a lower base part including a base and a water reservoir, which is equipped with a water circulation pump and a nozzle head, a middle part for providing an inner space wherein the fountain is playing and the air is allowed to be circulated so as to cause the impurities floating in the air to be moisturized, an upper cap part covering the middle part and provided with a plurality of air inlet holes, a suction fan assembly for causing the indoor air to be sucked into and to be circulated in the fountain-air cleaner, a baffle board for causing the sucked air to be freely dispersed and to be guided to the inner space of the middle part, a plurality of impurity absorption plates which are adapted for absorbing the impurities in the air and are radially mounted on a lower inner surface of the middle part, and an insert assembly for filtering off the impurities and permitting the water to be silently recovered by the reservoir.

Abstract: A grease extractor includes a centrifugal fan for forcibly flowing grease laden air in order to remove grease therefrom in cooperation with a trap member. The grease extractor comprises a vessel with an inlet for introduction of the grease laden air and an outlet for discharging clear air. The fan, which has a rotation axis and has a circumferential fan surface, is disposed between the inlet and the outlet to be rotated about a rotation axis so as to generate a forced flow of the air for introducing the grease laden air inwardly and flowing it radially outwardly through the circumferential fan surface. The fan includes impellers which deflects the grease laden air to separate the grease therefrom and coagulate it into corresponding grease particles. Flow converting members are provided on the circumferential fan surface for converting the radial air flow into an axial flow directed outwardly substantially along the rotation axis.

Abstract: A vacuum cleaner has wet and dry modes. In dry mode, air containing dust is passed through a multi-stage filter including adjacent subchambers containing a liquid for removing microscopic dust from the incoming air. The liquid is prevented from being exhausted from the vacuum cleaner with the exhausted air and is returned to the subchambers. In wet mode, a float and float guide cause a difference in pressure when the vacuum cleaner is filled with liquid. The pressure difference is sensed to actuate an electric circuit breaker to prevent overflow.

Abstract: A vacuum cleaner treats cleaning air by forcing the air through a liquid bath so as to remove suspended particulates within the air. The cleaner comprises a pan member adapted to contain the fluid bath, a cleaning air inlet, an upper casing supported from and secured to the pan member, and a motor mounted on the upper casing having a cooling air inlet and cooling air exhaust separate from that of the cleaning air. A main baffle shrouds the cleaning air inlet for the containment of the over splash created by induced fluid turbulence created in the liquid bath by the incoming cleaning air. At least two fluid collector rings are mounted between the cleaning air inlet and cleaning air outlet to provide a circuitous path for the cleaning air after it has traveled through the fluid bath to collect liquid particles and moisture in the cleaning air and redirect it back into the liquid bath.

Abstract: This invention relates to a combined decorative flower pot and air filter and in particular to one including a flexible trunk having a plurality of branches with perforations for receiving twigs, a base, a motor arranged in the base and having an outlet and an inlet, an air filter mounted on the outlet of the motor, a net mounted on a bottom of the flexible trunk and disposed on the base, a tubular member arranged within said flexible trunk and extending upwardly out of the flexible trunk and downwardly to connect with the inlet of the motor, a plurality of canes twisted on the branches and extending down into holes near the outlet of the motor, and a fragrant agent fitted on an outer side of the air filter.

Abstract: A semiconductor processing apparatus comprises a main body having an air passage, a plurality of filter units connected in series with the air passage in the main body, each filter unit having an air intake port, an air otlet port and an air blower, the air intake port of each filter unit communicating with the air outlet ports of the filter units disposed upstream side of the air passage, and a mechanism for arranging articles to be processed close to the air outlet port of each filter unit such that air is supplied to the articles to be processed after the air has passed through the corresponding filter units.

Abstract: A dust collector of the type wherein a main body of the dust collector includes one or more filter elements 11 which are permeable to air but not to airborne particles above a predetermined size, a live air zone 13 below the filter elements 11 and a main air inlet port 14; a vacuum being generated on that side of the filter elements 11 opposite the live zone 13 which thereby induces a pressure differential across the filter elements 11 whereby air and entrained particulate matter is drawn through the main air inlet port 14 into the live air zone 13 within the main body 17; the dust collector further including particulate matter guiding means 18 (in one particular form being in the form of a tubular shell) for changing the direction of movement of the entrained particulate matter in the main hopper immediately after it enters the main body from the main air inlet port 14; the particulate matter guiding means comprising a duct member 18, having at least one change in cross-sectional area therein from a smaller

Abstract: A vacuum filter vessel having a base and a source of vacuum. There is an inlet for dust laden air and a mainly imperforate container to receive dust. The inlet and the source of vacuum communicate with each other by a passageway extending around the container to communicate the top of the container and the vacuum source. There is a perforate filter member at the top of the mainly imperforate container to filter dust from the dust laden air.

Abstract: A device for removing the excess sprayed material in a spraying operation (e.g., the spraying of wet lacquer or the like) includes a spraying booth, a suction booth and an aspirator. A partition provided with openings separates the spraying booth and the suction booth. The openings are defined as tapering nozzles so that the air and sprayed particles are passed through the nozzles at a high rate of speed. This construction minimizes the deposition of particles on the partition. Once in the suction chamber, the air flow is slowed so that the particles will dry. The aspirator is located in an upper region of the suction booth so that the particles are drawn upward. A filter is positioned in front of the aspirator to collect the dried particles. The particles thereby form filter cakes which are easily removed from the filter.

Abstract: A modular, low-profile ceiling air filtration unit is disclosed having a diffuser plate with an unperforated zone along one edge, the remainder of the plate being perforated. A blower in the unit plenum directs air toward the end of the plenum having the unperforated zone. Turbulent air impinging on the housing end wall is prevented from passing through to a filter by the unperforated zone of the diffuser plate.

Abstract: A container providing environmental protection to electronic equipment includes a four sided frame, a front cover, and a rear cover. An exhaust fan is mounted on the rear cover and an air filter is mounted on said front cover to allow air to flow through the container. A viewing port is mounted on the front cover. A first door covers the viewing port. An access port on the front cover for allowing manual access to the electronic equipment. A set of elastic flaps is mounted on the cover covering the access port. A second door covers the access port.

Abstract: An oxygen enriching module provided with a bundle of many hollow oxygen enriching fibers, each having an air through-passageway enclosed by an oxygen selective permeable membrane wall, a container cell in the shape of a hollow open-ended casing for sealingly encasing the hollow oxygen enriching fibers, an axial air blowing device or air blowing fan integrally connected to at least one end of the container cell to cause an axial flow of the atmospheric air parallel with the axes of the bundle of many hollow oxygen enriching fibers and passing through the air passageways of the bundle of the many hollow oxygen enriching fibers, to thereby obtain an oxygen enriched air from the atmospheric air due to permeation of a part of the atmospheric air through the oxygen selective permeable membrane walls of the hollow oxygen enriching fibers into the chamber of the container cell.