Abstract: An engine intake system including a supercharger of a type wherein the intake air drawn from the intake air inlet port is compressed by the pressure of the exhaust gas before it is discharged through the intake air outlet port. A coarse air cleaner is provided in the intake pipe leading to the intake air inlet port and a fine air cleaner is provided in the intake passage communicating with the intake air outlet port, so that the pressure drop at the intake air inlet port can be minimized.

Abstract: A room air treatment system includes a housing or cabinet defining a filter chamber and a blower chamber. A blower, disposed within the blower chamber, is connected to the filter chamber by a duct. Positioned within the filter chamber is a HEPA filter and activated carbon or charcoal filter assembly. The housing defines an air inlet covered by a prefilter and an air outlet within which a louver assembly is disposed. A pivotal bail or generally U-shaped rod engages a generally rectangular filter retaining frame to sealingly retain the filter stack within the filter chamber. A control system is included for controlling operation of the blower motor.

Abstract: An oil separator, for use in the compressor discharge of a refrigeration system, has a turbine wheel on which refrigerant vapor impacts positioned within a vessel so that the oil is slung outwardly and impinges on the side walls of the vessel and the oil-free vapor is deflected 180.degree. to flow upwardly through the turbine wheel for discharge from the vessel.

Abstract: The invention is a combination trash can and vacuum cleaner attachment, comprising a rectangular container having a grocery bag contained therein, a top piece fitting over the rectangular container and having a plurality of airholes and a filter within, and a vacuum holes for attaching the device to a vacuum cleaner.

Abstract: A plurality of air blowers spaced with each other are disposed along a side wall of a clean tunnel, thereby outer air is supplied into a tunnel zone by way of a filter. A clean air produced within the tunnel zone is circulated by disposing air outlets and a suction port in a zone of each blower. Thus, a constant clean air flow can be circulated without raising the temperature of the clean air within the clean tunnel.

Abstract: An air distribution system for a vehicle cab is disclosed herein. Fresh air is drawn into the system, filtered and transferred to the interior of the vehicle cab. The system uses a blower for transferring air into the cab with all fresh air passing first through a fresh air filter. The fresh air filter has air flow from a hollow interior out through air permeable sides. This air flow traps particulates within the interior of the filter which is then easily removed from an air filter chamber without emptying dirt into the chamber or on the operator. Furthermore during operation, accumulated dust and dirt is kept within the filter and does not drop off on or around the cab. This system may be used for simple ventilation or may be combined with other air conditioning and air recirculation means thereby providing a total vehicle ventilation system.

Abstract: A device for generating a vacuum comprises a liquid-ring vacuum pump driven by an electric motor and operating with a working fluid. A mixture of compressed air and working fluid from the pump flows to a preseparator which separates a major portion of the working fluid from the gaseous mixture. The separated working fluid is fed from a reservoir in the preseparator via a liquid cooling coil back to the liquid-ring vacuum pump, while the gas still loaded with a residue of the working fluid is fed to a fine separator by means of a gas cooler, working fluid separated in the fine separator being returned to the pump via a return line. The preseparator and the fine separator are physically spaced from one another. The gas cooler and the liquid cooling coil are also physically spaced from one another and are located in the path of the cooling air stream for the electric motor.

Abstract: Apparatus and method for removing obnoxious fumes and particulate laden air from a work area above a table or desk for the treatment of human nails. The removed air is filtered in a unit removed from the table or desk to remove particulate 3 microns and larger in size and the fume laden air is diffused into the environment at a location remote from the work area and in a concentration sufficiently low to avoid discomfort to those present in the area.

Abstract: An oil separator for separating oil from exhausted gas containing refrigerant gas and fine particles of oil incorporated in the refrigerant gas including grooved plates each formed with a multiplicity of grooves on opposite surfaces to allow the exhausted gas to flow in a direction substantially at right angles to the grooves, whereby the fine particles of oil can be trapped by the grooved plates. The oil separator can achieve increased oil separation efficiency.

Abstract: The disclosure describes an electrical purification system for purifying a gas and which comprises a housing having an inlet and an outlet and defining a gas flow path between the inlet and the outlet, an electric blower means mounted to the housing for effecting a flow of gas along the gas flow path, and a self-contained filtering means operatively associated with the housing to communicate with the flow of gas. The blower means includes a stator and a rotor magnetically coupled to each other and further includes a blade means connected to the rotor and disposed within the housing in the gas flow path for forcing the gas along the gas flow path.

Abstract: A device intended to remove pollutants from the gases surrounding an arc welding operation comprising principally a blower adapted to draw the gases away from the welding operation. The gases are drawn into an inlet located near the work area through a hose having coils adapted to absorb heat from the gases. A filter using both magnetic and mechanical means is used to filter the pollutants from the gases before discharging into the ambient atmosphere.

Abstract: A clean room is disclosed which has a capability of being divided into separate work areas of predetermined size, and with the separate work areas being effectively isolated from each other to prevent cross contamination. The clean room comprises a filter bank composed of a supporting latticework and a plurality of filters, with the latticework being supported by tie rods which extend through the latticework. A plurality of wall panels are supported below the latticework, and are attached directy to the tie rods so that the weight of the wall panels is not borne directly by the tie rods and by the latticework. Also, the latticework and wall panels are effectively isolated from external vibrations, by means of a flexible sealing strip between the periphery of the latticework and the bounding side walls of the clean room, and by the fact that the wall panels are free of any connection with the floor of the clean room.

Abstract: Dust recovery apparatus is disclosed which recovers air-entrained dust in a high state of purity. The apparatus comprises a housing capable of sustaining at least slight positive pressure and suitable for accommodating powder processing machinery, an air supply system for passing air at a predetermined rate and at a slight positive pressure to the housing, a collector which collects dust entrained in air leaving the housing and an air-flow rate sensor which detects air-flow rate in the apparatus and activates valves for stopping air passing to the collector when the air-flow rate falls outside a predetermined range.

Abstract: A vacuum cleaner bag support in which a compression spring is itself supported in the interior of the upper terminus of an outer bag and carries a bag top support which resiliently maintains the bag elevated against lateral expansion thereof. An ornamental bag top member may be carried on the upper terminus of the outer bag and attached to the bag top support for movement therewith.

Abstract: Compact centrifugal fan and filter assemblies for use in providing laminar flow clean air to a work space environment such as those within clean rooms and clean air work stations or cabinets wherein the fan and filter element are mounted in a close physical relationship with respect to one another and within a common plenum chamber and wherein the fan creates an airflow which is initially generally parallel with respect to the filter element and which is thereafter channeled by baffle members so as to provide uniform air pressure and airflow across the filter element while reducing vibration and increasing the air flow rate from the fan and filter assemblies to such clean air environments.

Abstract: A hood is provided for use over pizza ovens in pizza preparation and delivery vehicles. The hood comprises two intake air fans and one inline exhaust fan. The intake air fans are each disposed adjacent a side wall of the vehicle and direct air from the sides toward the center of the hood. The exhaust fan is disposed adjacent a back wall of the vehicle between the two intake air fans. The exhaust fan exhausts the air from which the vehicle. A back draft damper is disposed downstream the exhaust fan. Hinged louvers on the back draft damper can be adjusted with a threaded rod to balance the air flow within the system. Vents adjacent the intake air fans have fixed louvers shaped to impede water droplet flow from entering the vehicle.

Abstract: A scent dispensing arrangement is disclosed for use in an upright vacuum cleaner having a flexible air pervious bag extending along a pivoting handle thereof and an air flow generating means which produces an air flow which is exhausted to atmosphere via the bag. A cap member is connected to a top end portion of the flexible bag and interconnected with the pivoting handle for supporting the bag at its uppermost extension along the handle. A scent dispenser is provided which includes a drawer slidably mounted in the cap member for retaining the scented material. The drawer is provided with apertures for providing a path for air flow to atmosphere with sliding movement thereof either opening or closing the path to control dispensing of the scented material.

Abstract: A modularized biohazardous fume hood in which a single unit retains a blower, and exhaust transition, and mount for the blower in a single package. The exhaust transition rides atop a non-metallic exhaust HEPA filter and therefore the non-metallic filter serves as a spacer as well as a sound and vibration deadener from the motor of the blower. Similarly, the base of the motor rests atop a second filter through which the recirculating air is driven downwardly over a diffuser and onto a work tray. The entire blower and exhaust transition rests atop the non-metallic HEPA filter, and therefore further sound and vibration deadening and space saving is achieved.

Abstract: A fluid propelling and filtering apparatus with removable filter cartridge comprising a bottom wall, an annular top wall, and filter media disposed between and secured to the walls for securing the bottom wall to the top wall in parallel, spaced relation and for communicating fluid in through the annular top wall and out through the outer surface of the filter material. The filter cartridge is removably attached to an electric motor for imparting rotational movement to the filter cartridge. The filter cartridge and the motor are enclosed within a housing.

Abstract: A sterile air trolley introduces sterile air into a zone adjacent all outermost boundaries of an upper part of a casing which extends laterally outboard of all sides of a lower part of a casing. The sterile air so introduced is without or free of any contaminated ambient air being entrained by the air so being emitted from the trolley and so introduced into the zone.

Abstract: This invention describes apparatus for pressurization and filtration of contaminated air for a vehicle or mobile dwelling capable of containing several persons, especially if the contamination is of nuclear, biological and chemical origin. The apparatus comprises an air loop extending between a contaminated air intake and a processed air outlet, comprising two cyclone precleaners, a filter and an air circulation blower. The apparatus also comprises a dust loop extending between the dust outlets of the prefilters and a dust outlet and comprising a dust discharge blower. In this apparatus, the blowers are coupled to an identical driving device, and the intake of the first blower is situated close to the air outlets of the cyclone precleaners.

Abstract: A floor care appliance having a filter bag with an inlet chamber accessed by an inlet aperture, and a quiescent storage chamber connected to the inlet chamber by an opening adjacent the top thereof. The filter bag is formed of filter sheet material as an elongate tubular member having the opposite ends folded and sealed to define an air impermeable seal. An inlet aperture extends into the interior of the tubular member adjacent one end thereof and the tubular member is folded upon itself spaced from the other end thereof with confronting portions of the tubular member being sealed together and including an opening adjacent the fold between the confronting portions to maintain an open air path from the inlet aperture to the other end of the filter bag.

Abstract: A dirt box for an upright vacuum cleaner comprises an elliptical upper side wall portion below a top wall, a bowl-shaped bottom wall, an inlet neck opening into the chamber in the lengthwise direction and below one end of the upper side wall portion, and aimed to establish a swirling action. An outlet port for the dirt box is off-center toward the end from which the inlet extends. The bowl-bottomed dirt box is tilted and emptied through the inlet neck.

Abstract: A filter casing for an air conditioning system includes exterior walls (1, 2, 2', 3 and 4) together with a front cover which comprises a plurality of doors (34, 35, 36, 37 and 38). The walls (1, 2, 2', 3 and 4) and doors (34, 35, 36, 37 and 38) form the casing which is divided into two compartments by parallel partitions (9, 9'). Air is drawn through an intake opening (39), through a channel (10) and sequentially passed through a temperature control apparatus (14), a filter (15) and a fan (16). The air is then transmitted through a fan outlet duct (20) to a channel (22). A plurality of absorption filter elements (23) receive the air from channel (22) and serve to remove contaminating agents. After the air is passed through the filter elements (23), it is directed into passageways (40 and 41) which are open to a rear space (42). From the rear space (42) the filtered air is exhausted from the casing through an outlet (30).

Abstract: An air cleaner assembly is provided for supercharged engines including a supercharger compressor, comprising a vortex air cleaner upstream of the supercharger compressor, and a rotatable barrier filter cartridge that is self-cleaning downstream of the supercharger compressor.

Abstract: An apparatus for both improving the heat distribution throughout a room from a portable kerosene heater and for collecting undesirable emissions resulting from the burning of the kerosene, includes a base adapted to be mounted on the top of the heater, the base supporting a vertically extending shaft on which is mounted a heat-driven fan formed of either paper or metal, and a disposable disk mounted a spaced distance above the fan on the same shaft, the disk serving as a collector for the undesirable emissions. When the device is placed on an operating kerosene heater, the rising hot air and gases from the heater cause the fan to rotate, which in turn causes emissions from the burning fuel to move upwardly in a more or less cylindrical path. As the products of combustion move upwardly, certain emissions therein such as soot, oily vapors, etc. deposit or condense onto the surface of the spinner and disposable disk.

Abstract: A suction cleaner having a motor fan unit and a casing having a dirt bag receiving compartment closed by a bag carrier in the form of a door and having a bag mount therein in the form of an air conduit extending from the motor fan unit. A dirt collecting bag can be disposed on each of the bag carrier and the bag mount. The bag carrier and the bag mount are relatively movable towards one another to automatically cause a latching assembly to secure a bag on the bag mount, with an opening of the bag in sealing engagement with the air conduit. The bag mount is movable between a bag unloading position away from said casing, and an operative position in which the bag is carried by the bag mount away from the bag carrier.

Abstract: A method and apparatus (1) for control of airborne particulates in enclosed spaces, wherein air is made to flow in parallel airstreams (F), with velocities of the streams selectively graded across the work space (W), so that the integrity of the air flow pattern is better preserved while encountering obstructing objects (6) that lie in its path; and so that any particle introduced into a stream remains entrained and airborne over a longer distance along the clean-to-dirty axis (X). The velocity gradient is achieved by a filtering device (1) comprising a plurality of pleats (25) each pleat having a different surface area.

Abstract: An imperforate duct has fluid-inlet and fluid-outlet openings at opposite ends thereof, between which is located a rotor that performs both a ventilating function and a filtering function by way of imperforate, rough surfaces which are adapted to retain solid and liquid particles contained in air or other gas that is being filtered, the rotor being followed by a gas-treating filter through which the fluid passes before emerging from the hood. An aerodynamic block against backflow is located between the inlet opening and the rotor, but not in contact with the rotor.

Abstract: A dust collector for a vacuum cleaner having a blower has an outer wall with an air-impermeable main portion bounding an inner chamber and a limited air-permeable portion, a filter accommodated in the chamber and connectable with the blower, and an additional filtering member associated with the air-permeable portion of the outer wall. The additional filtering member may be composed of an electrostatically chargeable filtering material and may be formed as a separate member or as a part of the wall of the dust collector.

Abstract: A cowl-like scrubber (20) for removing dust generated by a longwall shearer has a housing (21) adapted to be mounted on the shearer near a cutter drum. An air inlet (23) is provided in the housing to allow the dust-laden air to enter the scrubber (20). Downstream from the inlet area is an arrangement of jet spray nozzles (30) which impart high velocity, small diameter water droplets. The water droplets entrain the dust particles in the dust-laden air and move the resulting dust-laden mist to a mist eliminator (40) downstream from the jet spray nozzles where the dust-laden mist is then removed from the air.

Abstract: A respirable particle sampling instrument passes air with a fan through a passage having first a pre-filter thereacross to collect non-respirable airborne particles and then a main filter to collect respirable particles, the pre-filter being formed by a random fibrous network having interstices of such size and distribution as to capture a major proportion of the non-respirable particles within a prescribed range of velocity for which particle capture is predominantly by inertial impaction. The pre-filter suitably comprises porous foamed plastics material, preferably in a structure of contiguous layers having successively changing pore sizes and distribution, preferably of a polyester, and preferably having an oil coating. The pre-filter will normally have a penetration function approximating the so-called Johannesburg curve.

Abstract: A filter assembly for clean air installations includes a block of high efficiency particulate air (HEPA) filter material adhesively bonded and sealed within an imperforate rigid thin-walled side frame which extends axially beyond the inlet surface of the filter block and thus provides an integral plenum chamber volume as part of a self-contained filter subassembly. The side frame has peripheral cover and supporting flanges at its inlet and outlet ends and can thus be conveniently assembled with and removed from a reusable cover member and cover gasket for the plenum chamber and a reusable perforated outlet grill and one or more peripheral outlet sealing gaskets, all of which constitute parts of a complete filter assembly which can be readily supported by a standard or special ceiling or wall grid or frame assembly.

Abstract: An upright vacuum cleaner having a motor housing, a handle pivotally attached to the housing, and a flexible dirt-receiving bag extending between the housing and the handle is disclosed. A top cover assembly is provided for supporting the top of the bag, and includes a rectangular cup-shaped cover having top, side, and end faces enveloping a portion of the top of the bag. An attaching assembly is provided for attaching the cover to the handle and to the top of the bag within the cover. The attaching assembly includes a wire hanger extending through the top face of the cover and then extending from a location adjacent one end of the cover toward the other end of the cover. The attaching assembly further includes a clamping web fixed to the underside of the top face. Downwardly and inwardly extending ends of the web enter pleats at the sides of the bag to removably hold the bag in place within the cover.

Abstract: A filtration module having a receptacle for a filter element accessible through the outlet opening of the module has light means disposed outwardly from the receptacle with respect to the direction of air flow. The module is also preferably provided with sprinkler means including a spray head disposed outwardly from the module outlet opening.

Abstract: A gas-liquid separator, especially for use with a submersible well pump, having a substantially conical-shaped mesh member in the path of flow of gas-laden liquid. The majority of the liquid flows through the mesh; gas bubbles are trapped by the mesh and are swept by the flow of the liquid to a location where they are removed with a relatively small amount of bleed liquid from the separator Any particulate foreign matter in the gas-laden liquid, is trapped by the mesh and is swept along with the gas bubbles to the gas removal location.

Abstract: A laminar flow clean air enclosure has at least two spaced apart side walls and a planar filter extending between the side walls to define a work area. A transition duct couples air between the outlet of a blower and an entrance region near one end of the filter inlet to expand air leaving the blower outlet without introducing turbulence. A plenum chamber in communication with the entrance region and substantially the entire cross-sectional area of the filter inlet is formed so as to provide air at constant velocity to substantially the entire cross section of the filter inlet. As a result, the velocity of the air leaving the blower outlet is gradually reduced without turbulence to the desired exit velocity for the air leaving the filter. A perforated screen having a planar central region and an angled peripheral region covers the filter outlet.

Abstract: A hand vacuum cleaner includes a housing having an inlet and an outlet, and a front and a rear part connectable with each other so as to constitute the housing. The housing has a front face and a rear face spaced from the inlet in the flow direction of incoming contaminated air entering the housing. A dust filter is located in the housing at the rear face thereof. A blower is located in the housing for aspirating the contaminated air into the housing through the inlet and into the dust filter and for urging the filtered air therefrom in a second direction towards the outlet. An intermediate plate is provided in the interior of the housing, which has a first formation constituting a first passage for the incoming contaminated air, a second formation constituting a second passage for guiding the filtered air from the dust filter towards the outlet and a third formation for fixing thereon the blower.

Abstract: A method and apparatus for stripping entrained organic vapor and solid particulate matter from a pyrolytic off-gas stream is disclosed. The off-gas is introduced at the top of a conical chamber having a variable speed "squirrel cage" rotor at its top. The wet, dirty, off-gas is drawn into the rotor from below and impinged upon the chamber walls which causes part of the organic vapor to condense and flow to the chamber bottom, thereby cleaning the chamber walls. A portion of the impinged gas is recirculated through the rotor while the remainder exits at the chamber bottom. The ratio of recycled gas to through gas is controlled by the speed of the rotor. Heating and cooling coils on the chamber walls are operable to control the rate of condensation.

Abstract: The disclosed apparatus dispenses volatized air freshener compound into the room air forcibly moving the air through a prefilter and a high efficiency filter utilizing a fan disposed in the space therebetween. A container of volatile air freshener liquid or gel is positioned in a location such that the air drawn through the prefilter will pass across the top of the container. The container is provided with a lid mounted for movement to open and close the container, the lid being connected to and operable by a control such as a timing mechanism to adjustably regulate the amount of volatized air freshener compound which is permitted to escape into the air passing through the air filter, or the container can be kept totally closed and thus inoperative.

Abstract: An air purifier which includes an air intake with electrically charged plates for ionizing particles of smoke, dust, and impurities entrained in the air, a fan or other air-moving device to move the polluted air through the intake and over the ionizing plates and to discharge the air against a collector which is spaced from the charged plates and is electrically grounded and upon which the ionized pollutants will deposit, and an air outlet through which the purified air can be discharged, leaving the pollutants behind on the collector element.

Abstract: An arrangement for separating paint residuals and solvents from the exhaust air of a paint spray chamber comprises a device for blowing a stream of supply air through the spray chamber to take along exhaust air containing paint and solvent particles, a filtering conveyor located below the chamber for intercepting from the exhaust air paint particles and discharging continuously the same, and a second conveyor arranged below the filtering conveyor and adapted for receiving and discharging a layer of adsorptive material that intercepts solvent particles remaining in the filtered exhaust air.

Abstract: There is provided a filter wherein the filtering means has a non-woven needled textile filter fabric with an overall bulk density of at least 6 pounds per cubic foot and bulk density gradient such that the bulk density at the face surface of the fabric is greater than the bulk density at the back surface of the fabric. In conjunction with that bulk density gradient is a filtering gradient such that the fineness of filtration at the back face surface is greater than the fineness of filtration at the surface. The filter may be in any convenient form, such as the bag of an air conveyor filter or a vacuum cleaner filter.

Abstract: An air cleaner especially for use on small single cylinder internal combustion engines has a substantially annular air filter element of the dry paper type, removably mounted in a housing to divide the same into inner and outer compartments, the latter having an outlet for cleaned air that is connectable with the air intake port of the engine carburetor. An inlet passage for air to be cleaned which leads to the inner compartment, is so constructed that air flowing therethrough must undergo an abrupt change in direction in order to reach the inner compartment, and has an outlet so located that solid contaminants entrained in the air flowing to the inner compartment, by virtue of the tendency thereof to continue moving in the direction they were, leave the inlet passage through that outlet and hence are separated from the air before it enters the inner compartment.

Abstract: A novel, automatic, pneumatically operated bypass valve is provided in an r duct connecting a fan powered gas-particulate filter unit and an air conditioner unit. The bypass valve contains a bellows, which is automatically inflated by pressurized air transmitted thereto from the filter unit through a separate conduit, thereby closing the bypass valve when the filter unit fan is in operation. When the filter unit fan is turned off, the pressure in the filter unit falls to ambient, which automatically deflates the bellows and opens the bypass valve to provide a fresh air path to the air conditioner unit.

Abstract: A concealed ventilating system for votive stands constantly draws decor damaging candle emissions into the interior of the stand and through a filter box contained therein. Substantially clean air is exhausted at the bottom of the stand gently and silently. The system does not detract from the traditional appearance and functioning of votive stands on which it is installed.

Abstract: A room air purifier for quietly removing irritating or harmful impurities from the air circulating within the room. The purifier removes from room air, particles down to 0.3 microns in size with 99.9% efficiency. The air purifier comprises a somewhat elongated upright housing having an easily-removable back, a two-speed blower that is preferably AC operated and disposed at the bottom of the housing, a pair of vertically disposed ultraviolet lamps and associated means for powering the lamps including push button switch means, and preferably three separate filters including a pre-filter disposed at the inlet of the blower, a highly efficient main filter element vertically stacked over the blower and lamps and a charcoal filter disposed over the main filter element.

Abstract: An air filtering installation for an internal combustion engine equipped with a supercharger and a supercharger inter-cooler, in which the air filtering installation includes a centrifugal dust separator and a dry air filter with interchangeable filter insert; the centrifugal dust separator is thereby arranged on the suction side of the supercharger and the dry air filter is arranged downstream of the supercharger inter-cooler.

Abstract: A filter box contains within a rotatably mounted filter, structured as a drum, a fiber preseparator cooperating with such filter. The fiber preseparator has a ventilator at its inlet and operatively flow communicates with a fiber separator. This fiber separator contains a movable plunger or equivalent structure, by means of which the separated fibers are compacted and ejected into a collecting container. The air flowing through the filter effluxes through an opening in the filter box into the machine room or area containing the textile machines with which the filter box is used. The air responsible for transport of the fibers from the preseparator into the fiber separator, following separation from the fibers, is returned back to the suction side of the ventilator and again into the preseparator. A suction tube cooperates with the inner side or wall of the rotating filter drum. This suction tube likewise flow communicates with the suction side of the ventilator by means of a dust separator.

Abstract: A pumping apparatus, more especially for fluid materials containing entrained gas pockets, comprises a single entry centrifugal impeller pump and means for maintaining a reduced pressure on the side of the impeller opposite said single entry to the pump. The pump impeller may have gas evacuation passages extending through the impeller disc from orifices located on the low pressure side of the impeller blades. The pumping apparatus preferably includes a liquid chamber communicating with the pump casing on said opposite side of the impeller, means controlled by the liquid level in said chamber for connecting the latter either with a vacuum source or with atmosphere, and means responsive to atmospheric pressure within said chamber for discharging liquid therefrom to the inlet side of the centrifugal pump.