Abstract: An airflow shaper for use in an air cleaner is provided according to an embodiment of the invention. The airflow shaper includes a body including a substantially central axis and a raised central region formed on the body. The raised central region transitions an impinging axial airflow into a substantially radial airflow or transitions an impinging radial airflow into a substantially axial airflow.

Abstract: A filter element that has at least two, planar, non-curved filtration panels. In a preferred embodiment, the filter element has three panels, providing a generally triangular filter element. The outlet aperture, from the filter element, generally follows the configuration of the filter. That is, a filter element having three filtration panels will have a generally three-sided outlet aperture. The outlet aperture preferably is not a true polygon, but rather, includes rounded or curved sides and/or corners. The filter element includes an outlet sealing configuration that may provide both axial and radial sealing to outlet ductwork.

Abstract: An air cleaner element includes an element body 19, which filters an air flow, and a guard member 20 secured to the element body 19. The air flow is introduced into the element body 19 through a first end surface 19a of the element body 19. The air flow is then filtered and sent out from a second end surface 19b. The guard member 20 has a leg portion 26, which is secured to an outer circumferential portion of the first end surface 19a of the element body 19. The guard member 20 projects toward the upstream side of the air flow and includes guard portions 27, which are connected together at the distal ends of the guard portions 27. The guard portions 27 function as a handle when the element body 19 is removed or installed and as a blockage portion that prevents large-sized foreign matter T from entering the element body 19.

Abstract: A device for filtering a gas flowing through a line, particularly for filtering the air flow in an intake line of an internal combustion engine, including a filter element which is insertable in a line section and surrounds a longitudinally extending interior cavity in the manner of a cover. In order to equalize the flow of gas, a choke element is furnished with at least one breakthrough in the interior cavity and divides the inner cavity into two sub-sections that are connected to one another via the at least one breakthrough.

Abstract: A cyclonic separating apparatus for separating solid material from a fluid includes a separating chamber, an inlet communicating with the separating chamber for carrying the fluid with the solid matter entrained therein to the separating chamber, and an outlet for carrying the fluid away from the separating chamber after the solid material has been separated therefrom. The outlet is formed by a conduit communicating with the interior of the separating chamber and having a longitudinal axis. A plurality of grooves are formed in an interior surface of the conduit outlet and extend in the same direction as the longitudinal axis. The presence of the grooves in the outlet has the effect of reducing noise generated by the apparatus when in use and also improves pressure recovery.

Abstract: There is provided cyclonic separating apparatus (100) comprising a chamber (112) for separating dirt and dust from an airflow, an inlet (110) to the chamber (112) and a shroud (200). The shroud (200) comprises a wall (200) having a multiplicity of through-holes (208) forming an outlet from the chamber (112), each through-hole (208) having a width and a height, wherein the through-holes (208) have substantially rectangular cross-sections with width to height ratios in the range of 1.5:1 to 1:1.5. The rectangular cross section of the through-holes (208) maximises the available through-hole (208) area in the shroud (200). This results in a low pressure drop across the shroud (200) and reduces the amount of material required for manufacture. Further, this ratio allows the cross-sectional area of the through-holes (208) to be dimensioned to prevent larger particles of dirt and dust from passing through the through-holes (208) in the shroud (200), whilst still providing the required structural integrity.

Abstract: A separating apparatus includes a shroud that has a wall having a multiplicity of through-holes. At least one baffle is provided on the inner surface of the wall of the shroud. The baffle directs the airflow entering the shroud towards the central region of the shroud, thereby reducing conflicting air currents. The baffle may also be used to assist correct assembly of the separating apparatus. The baffle may be arranged to locate with a member provided on another component of the separating apparatus, such as a cyclone assembly, in order to locate that assembly in a predetermined orientation.

Abstract: An air filter has an inner filtering body within an outer filtering body. The air filter is configured to fit inside a scoop and adjacent to the inlet opening of the scoop. By placing the air filter adjacent to the inlet opening of the scoop, the size of the air filter may be increased as compared to a traditional air filter which fits within the neck area of the scoop. As such, the surface area of the air filter may be increased to provide more air to an air intake system such as a carburetor, fuel injectors, throttle body, or the like, as compared the traditional air filter. The inner filtering body may be recessed inside or protrude from the outer filtering body. The inner filtering body may be coupled to the outer filtering body along the base of the air filter. The inner filtering body increases the surface area of the air filter so that more air may be provided to the air intake system of a vehicle.

Abstract: A cyclone separating apparatus and a vacuum cleaner having the same are provided. The cyclone separating apparatus includes a cyclone body including a cyclone chamber and a dust collecting chamber, a cover unit connected to an upper portion of the cyclone body, a door unit openably mounted to a bottom portion of the cyclone body, and at least one noise reducing rib formed in an air discharging pipe in the cyclone chamber.

Abstract: A cyclone dust collecting device, for use in a vacuum cleaner, includes a housing defining therein a cyclonic air flow chamber. A dust collection chamber is disposed under the cyclonic air flow chamber and a partition wall is disposed between the cyclonic air flow chamber and the dust collection chamber. An opening and at least one ventilation hole are provided in opposite sides of the partition wall, respectively, so that a part of air and dust vortically moving in the cyclonic air flow chamber are introduced into the dust collection chamber through the opening and the air in the dust collection chamber flows back into the cyclonic air flow chamber through the ventilation hole.

Abstract: An air filtration cartridge has annular filter media having a hollow interior and extending axially between first and second distally opposite end caps. The first end cap is an outlet end cap having flow straightening structure integrally formed therewith and spanning the hollow interior. The second end cap is a closed end cap having an interior face having quarter wave resonators formed by blind holes therein.

Abstract: An oil separator for use in a compressor for separating oil from refrigerant. The separator includes a discharge line having an inner surface, a structure in the discharge line forming an inlet and an outlet within the discharge line, wherein the inlet has a wider diameter than the outlet; and a design for preventing oil from exiting the outlet and means for directing the oil out of the discharge line. In one embodiment, the structure is a substantially circular wall, and wherein the design for preventing is the shape of the wall and relative orientation of the wall to the discharge line. In one embodiment, the relative orientation is such that the discharge line has a flow direction with a horizontal component of orientation and the wall has a vertical component of orientation relative the horizontal component.

Abstract: Disclosed is a vacuum cleaner which can remove sludge, bad smells and toxic gases and discharge the filtered air to the upper portion of the vacuum cleaner to prevent the filtered air from being sucked with non-filtered air into the cleaner again. The vacuum cleaner includes: a dust collector having a suction hole; a cleaner body sealably assembled on the upper portion of the dust collector; a handle hinged on the upper portion of the cleaner body; a filter assembly assembled inside the dust collector and having a disc filter located on the lower surface of the cleaner body, an activated carbon filtering part located under the disc filter and a cone type filtering part located under the activated carbon filtering part; and an air discharging unit assembled on the air discharging part of the cleaner body.

Abstract: The described embodiments of the present invention include a cyclonic filter having an inlet and outlet. The cyclonic filter includes a chamber in communication with the inlet, flow from the inlet being directed in a rotational flow about an axis within the chamber. The cyclonic filter also includes a first baffle element positioned in the chamber, the first baffle element having at least one inlet. The cyclonic filter further includes a second baffle element positioned within the first baffle element, the second baffle element having at least one outlet, the at least one outlet of the second baffle element being positioned relative to the at least one inlet of the first baffle element in a direction opposite to the rotational flow, the interior of the second baffle element being in communication with the outlet.

Abstract: A system for separating an entrained liquid component from a gas stream employing at least one vortex tube having a liquid outlet end and a wet gas inlet tangential to its sidewall and arranged so that wet gas rotates within the vortex tube to cause the liquid components to be forced against the interior wall surface by centrifugal action. An orifice plate closing the vortex tube first end has a concentric gas outlet opening therein. A vortex finder tube extends concentrically within the vortex tube providing an annular area between itself and the vortex tube internal wall. A gas deflector positioned within the annular area has a downwardly spiraled surface that diverts wet gas downwardly away from the wet gas inlet. In one embodiment, an outlet tube is affixed to the orifice plate central opening and is configured to divert outlet gas downwardly. In another embodiment, an energy absorbing housing surrounds the vortex tube liquid outlet end.

Abstract: To enlarge an opening area in an element retainer supporting a clean side of an element, to reduce resistance to air passage and thereby to enlarge intake air quantity. The interior of an air cleaner is surrounded by a case and a lid is partitioned by an element into a dirty side and a clean side. An opening portion on the side of the clean side of an element holder supporting the element is covered by an element retainer, and the element retainer is formed in the shape of a louver.

Abstract: A fluid flow regulator of a smoke evacuation system for use with laparoscopic and endoscopic surgery is disclosed. The fluid flow regulator is comprised of a flow regulating means and a conduit connecting means. The flow regulating means in one embodiment includes a diaphragm and one or more orifices of predetermined diameter to provide a significant obstruction to the flow of fluid through the evacuation system. When operatively coupled to the pressurized surgical site, the fluid flow regulator makes possible the continuous evacuation of surgical smoke while simultaneously maintaining the pneumoperitoneum in a distended position for the duration of the laparoscopic procedure. Also disclosed is a method of using the fluid flow regulator to continually evacuate surgical smoke in the course of laparoscopic and endoscopic surgical procedures without deflating the pneumoperitoneum, which hereto for has been used by prior art systems to evacuate surgical smoke.

Abstract: A system for separating an entrained immiscible liquid component from a gas stream employing a vessel having a wet gas inlet, a gas outlet and a liquid outlet. At least one vortex tube is supported within the vessel and has a liquid outlet end and a wet gas inlet tangential to its sidewall and arranged so that wet gas rotates within the vortex tube to cause the liquid components to be forced against the interior wall surface by centrifugal action. An orifice plate closes the vortex tube first end and has a concentric gas outlet opening therein. A vortex finder tube is affixed to the orifice plate in communication with the gas outlet opening and extends concentrically within the vortex tube, the vortex finder tube providing an annular area between itself and the vortex tube internal wall. A gas deflector positioned within the annular area, the gas deflector having a downwardly spiraled surface that diverts wet gas downwardly away from the wet gas inlet.

Abstract: An apparatus for delivering a gaseous product includes a horizontal container having inlet and outlet ports, an elongated hollow tube inside the container, a purifying medium inside the tube, inlet and outlet control means adapted to control delivery of the fluid to the inlet port and to control delivery of a gaseous product from the outlet port. The tube has a first opening, a second opening spaced apart from the first opening, and an internal axis between the first and second openings. The first opening is in fluid communication with the outlet port and the second opening is in fluid communication with a vapor space in the container. A portion of the internal axis adjacent the second opening is at an angle greater than zero degrees relative to the horizontal longitudinal axis of the container. Each of the inlet and outlet control means preferably are single ported valves.

Abstract: A vacuum cleaner having a reduced velocity chamber with a high velocity air inlet, an electric motor, a rotary blade driven by the motor to create a vacuum in the chamber, an outlet for exhausting air from the chamber, which air flows in a selected path from the air inlet, through the chamber and out the air exhaust outlet and a disposable porous sheet filter layer in the chamber for removing large solid particles from the air.

Abstract: An air filtering and freshening device comprising a filter element within the intake of the device housing, a motorized fan mounted within the device housing which draws contaminated air into the device, and forces air out of the device through an outlet having separate exhaust and scent discharge passages. The exhaust passage including a plurality of arcuate vanes radiating outwardly from the interior of the device, and being disposed across the exhaust passage to promote efficient operation by reducing the pressure drop through the passage and minimizing operational noise. The scent discharge passage includes a scent element producing a freshening scent. The scent element is removably positioned adjacent the scent discharge passage, which carries high velocity, high pressure filtered air from the motorized fan, picks up the concentrated freshening scent, and discharges in an effective and efficient manner, a continuous stream of freshening scent.

Abstract: A vacuum cleaner having a reduced velocity chamber with a high velocity air inlet, an electric motor, a rotary blade driven by the motor to create a vacuum in the chamber, an outlet for exhausting air from the chamber, which air flows in a selected path from the air inlet, through the chamber and out the air exhaust outlet and a disposable porous sheet filter layer in the chamber for removing large solid particles from the air.

Abstract: An evacuation system for a chamber (14) is provided, including a pump (12) for removing gases and contaminants from the chamber. The pump has an outlet (32) connected to an exhaust duct (34). A collector trap (42) for use in collecting contaminants evacuated from the chamber is positioned between the pump outlet (32) and the exhaust duct (34). The collector trap (42) comprises: (i) a gas/contaminant separator (46) having an inlet (56) for introducing gases and contaminants therein, the separator (46) functioning to physically separate the gases and contaminants; (ii) a contaminant collector (48) for collecting the separated contaminants, the collector (48) including an extractor coupling (70) for allowing extraction of the contaminants from the collector; and (iii) an outlet (72) for allowing the separated gases to exit the gas/contaminant separator (46) and into the exhaust duct (34).

Abstract: The present invention provides an air filtration device attachable to a motor. The device comprises a housing comprising an upper part and a lower part, wherein the upper and lower parts are parallel and spaced apart from each other and define a cavity therebetween, and wherein the lower part has a centrally positioned opening therein; an impeller positioned coaxially with the axis of the housing between the upper and lower parts thereof and attached to the motor; and a filter positioned between the upper and lower parts and positioned around a perimeter of the housing.

Abstract: The invention provides cyclonic separation apparatus containing a cyclone body having at least one fluid inlet and a fluid outlet, the fluid outlet being concentric with the longitudinal axis of the cyclone body. The cyclonic separation apparatus also contains a vortex finder projecting from an end surface of the cyclone body into the interior of the cyclonic separator, and a centerbody located partially within the vortex finder. The centerbody projects beyond the distal edge of the vortex finder so that the distance between the end surface of the cyclone body and the further end of the centerbody is at least twice the smallest diameter of the vortex finder, and the cross-sectional area of the centerbody is circular at any point along its length.

Abstract: A mobile debris collection machine with an improved filter system includes a chassis, wheels for supporting the chassis, a debris collection device on the chassis, a debris container on the chassis, and a vacuum system on the chassis for moving dust and debris from the debris collector to the container. The vacuum system includes a dust and debris inlet, a vacuum fan, a dust and debris conduit extending from the inlet to a deflector which directs dust and debris from the inlet toward an area adjacent the vacuum chamber which is positioned above the debris container. There is a first filter stage upstream of the vacuum fan and attached thereto for rotation with the fan. There are a plurality of second filter stages, each downstream of the vacuum fan with the air flow from the vacuum fan being generally equally divided between the plurality of second filter stages. There is an air outlet for each second filter stage and a diffuser mounted in connection with each air outlet.

Abstract: The invention relates to an air filter having a primary air region and a secondary air region separated by a barrier. The primary air region contains a filter element for filtering out particles in the primary air. The secondary air region is designed to receive crankcase emissions sent from an engine's crankcase. Crankcase emissions are a result of gas escaping past the piston rings and into the crankcase due to high pressures in the cylinder during compression and combustion. To aid in removing these gasses from the crankcase, a venturi is enclosed within the housing to increase the negative pressure within the housing and in the secondary air region. This increase in negative pressure draws crankcase emissions out of the crankcase and thus reduces oil and crankcase gas bleeding from the crankcase.

Abstract: An air filtering device for an engine includes two cone-shaped filtering members which are co-axially mounted with other and two collars are respectively engaged with two ends of the assembly of the two filtering members. Each filtering member has a spirally-shaped corrugated periphery. A manifold is connected between the filtering device and an engine, a tube connected to manifold and communicating with an interior of the manifold. A regulation member is received in the manifold and includes a ring with a plurality of blades engaged in the ring. Each blade is located inclinedly relative to the ring. Air flows in the filtering device from two ends and the periphery of the device and the filtered air flow becomes spiral flow entering the engine.

Abstract: A spark arrester includes a buffer plate against which exhaust gases discharged from the outlet end of a tail pipe strike directly. Upon impingement on the buffer plate, the exhaust gases become turbulent or agitated whereupon temperature distribution of the exhaust gases is made uniform. The buffer plate has a plurality of through-holes arranged to allow passage of the exhaust gases after the exhaust gases impinge against the buffer plate. After passing through the through-holes, the exhaust gases flow through a wire screen during which time sparks in the exhaust gases are caught by the wire screen. The exhaust gases are then guided downstream along a guide tube and finally released from an outlet end of the guide tube. A stream of exhaust gases discharged from the guide tube has only a limited length of high-temperature zone.

Abstract: In a mist recovering apparatus for recovering a mist contained in a gas, provided with a filter having pores of pore size increasing from a gas inlet side toward a gas outlet side, the gas containing the mist is passed from the gas inlet side of the filter, through the filter toward the gas outlet side of the filter. The mist is trapped by the filter and grows into droplets as the gas containing the mist flows through the filter, and the droplets drip down along the gas outlet surface of the filter and are collected under the filter.

Abstract: An air cleaner device is disposed beside an engine chamber. A connection pipe is connected to the engine chamber and the air cleaner device. The air cleaner device is adjacent to an accumulator. The air cleaner device has a lower box, an upper cover covering the lower box, four clamp devices disposed on four upper corners of the lower box, and a filter device disposed in the lower box. A connection pipe is connected to the upper cover. An air inlet pipe is connected to the lower box. An air activation block is disposed on the filter device. A large number of air passages are formed on the air activation block.

Abstract: A filtration installation including a time delay device which, at the time of a filter sleeve cleaning operation, establishes a cycle to exhaust filtered air towards the outside atmosphere instead of recycling it. The installation also includes a device for bypassing the filtered air that includes two shutters. One of the shutters controls a recycling of the filtered air and the other shutter controls the exhaustion of the filtered air to the outside atmosphere.

Abstract: This invention relates to a mask with an air filtering device and in particular to one including a helmet adapted to a head of a user, a visor pivotally connected with a lower side of the helmet and having a soft pad for preventing air entering therein from outside, a filtering chamber having a blower driven by a dc motor and a filtering plate mounted between the blower and a cover of the filtering chamber, a pipe connected at one end with an outlet of the blower and extending at the other to space around mouth and nose of the user, a curved air guider for converging cleaned air into the space around the mouth and nose of the user and a check valve mounted on the soft pad for exhausting air exhaled by the user.

Abstract: A laminarizer or arrangement for producing laminar flow, particularly for ceilings and walls of clean rooms or the link formed of filter modules. The laminarizer is suspended or held spaced from a cover supporting mechanical filters. The laminarizer is composed of rectangular frames with fabric sheets stretched onto the rectangular frames. The side members of the rectangular frames are hollow sections or angle sections of triangular cross-section. The fabric sheets rest against and are aligned by the surfaces of the side members facing the rooms are only as narrow and/or rounded-off alignment contacts for the fabric sheets, while the fastening of the fabric sheets is provided at the outer surfaces of the side members extending perpendicularly to the plane of the frame and/or on the rear surfaces of the side members extending in the plane of the frame.

Abstract: A catalytic converter has a monolith with a plurality of catalyst coated passages to which internal combustion engine exhaust gases are directed with a nonuniform velocity profile that is highest at the center. A flow distributor is mounted in the converter downstream of the monolith that restricts flow centrally through the monolith while allowing relatively free flow radially outward toward the periphery to thereby alter the velocity profile at the entrance to the monolith so as to effect substantially equal distribution of the gases between all the monolith passages without extracting heat from the gases prior to entering same and without adding substantial back pressure.

Abstract: A centrifugal separator for separating liquid and solid contaminants from flowing gas and for separating certain liquids from other liquids. The centrifugal separator finds novel application as a flow stabilization system wherein the separator vessel is coupled into a natural gas flowline upstream of flow measurement equipment to minimize fluctuations of flowing natural gas, which may contain solid and liquid contaminants. The separator vessel defines an internal fluidic column within which is developed rapid cyclonic gas flow activity for separation of any liquid and solid contaminants from the gas. The vessel also defines a sump for accumulating and/or draining contaminants separated from the flowing natural gas in the fluidic column. An outlet extends into the vessel positioning an outlet opening to receive only gas from the cyclonic circulation of natural gas.

Abstract: A cyclone is disclosed, which comprises a cylindrical shell, an inverted conical hopper depending from the cylindrical shell, a cylindrical dust exhaust duct leading from the lower end of the inverted conical hopper, a gas supply duct extending tangentially or circumferentially of the cylindrical shell for introducing dust-containing gas into the cyclone, and a gas exhaust duct penetrating the top wall of the cylindrical shell with the lower end of the gas exhaust duct positioned below the top wall, and in which the peripheral wall of the cylindrical shell has a projecting side wall portion inwardly projecting into the cyclone and terminating in the joint of the inner side wall of the gas exhaust supply duct and the peripheral wall of the cylindrical shell. The cylindrical gas exhaust duct has a protruding portion, which smoothly protrudes sidewise from its lower end and has a diameter equal to or greater than the diameter of the gas exhaust duct.

Abstract: A ring-shaped air cooler has an inlet at the top and an outlet at the bottom. A peripheral wall surrounds the outlet and projects upwardly forming a condensate trap. Air admitted at the inlet flows in two streams through each half of the ring. The streams impinge on and are deflected by surfaces of the wall, removing condensate therefrom.

Abstract: A compact, self-cleaning, cabinet, dust collector is provided. The collector housing is a single-piece, molded unit having recessed areas and a molded air inlet. Entering dust-laden air is directed into two flows in a passageway surrounding a suspended, flexible, pleated filter element. An inner wall of the passageway contains a precleaner upstream from the filter element. A collector ramp, at the bottom of the passageway, directs pre-cleaned matter to a removable hopper. A fan, supported above the open upper end of the filter element draws air through the collector. A fan motor is isolated from the housing interior in one of the recessed areas of the housing. To gain access to the filter element the fan is rotated upwardly and away from the filter element. To prevent the pleats of the element from collapsing, hot-melt spacers are provided on the pleat surfaces. The element is flex-cleaned by a rotatable mechanism located beneath and adjacent the bottom closed end of the element.

Abstract: A fluid/particle separator assembly includes an apertured rotary separator mounted substantially to close an inlet to a chamber through which a fluid is forced by a pump or impeller. The separator is rotated at such a speed that inclined faces bounding its apertures, and facing in the circumferential direction of motion, occlude direct flow through the separator; particles in the flow rebound from the separator to remain on its inlet side while the cleansed fluid passes through the rotor, is centrifuged outwardly and ducted by baffles in the chamber to an outlet. A method of separating particles from a flowing fluid by means of said rotary separator is also disclosed.

Abstract: A multi-stage centrifugal chamber filter for separating solids from a gas stream. The filter has a plurality of separate multistage filter elements, each having at least one flow channel to which a plurality of centrifugal chambers is connected. The cross-section of the flow channel decreases in the direction of flow from chamber to chamber in order to provide a constant velocity of flow. The inlet and the outlet of the or each flow channel are designed to be in opposite end walls of the filter elements. A plurality of filter elements are located in a filter housing between two parallel walls spaced apart in the housing. Passages are provided in the walls for opposing inlets and outlets of the filter elements. The filter housing has at least one purified-gas outlet between the walls. The inlets and outlets of the filter elements are connected outside the walls to a crude-gas inlet and a residual-gas outlet respectively.

Abstract: This invention relates to a dust control device enabling dust to be wetted with water mist.The device according to this invention has a water impeller 2 situated in a tunnel 11, 12 behind the fan impeller 1 when viewed upon in the air flow direction in the tunnel 11, 12.The water impeller 2 has a water passage 13 with a suitable hole 5 on the circumference, said hole being situated transversally relative to the water passage 13 and being inclined at an angle .alpha. to the radial axis of the water impeller 2 opposed to the rotation of the said water impeller 2.The described device is particularly useful in underground coal mines in places where coal is loaded from one conveyor onto another.

Abstract: An air circulating device for providing a constant movement of air within the occupant zone of rooms which do not contain openable windows to allow natural air circulation during hot days. The air circulating device is provided in two forms, each form preferably situated in the corner of the room, the first form comprising a vertical air chamber with a first air inlet positioned adjacent the floor of the room and two air outlets positioned so that air forced from the vertical air chamber will flow outward in divergent paths along each of the walls forming a corner of the room, the inlet pulling in air diagonally from within the occupant zone of the room, providing complete air circulation. The second form of the air circulating device comprising top and bottom air inlets and a pair of air outlets in which air is forced through the outlets in divergent paths diagonally into the occupant zone of the room, the top and bottom inlets and spaced outlets are spaced intermediate the floor and ceiling of the room.

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 workbench filtering station (10) includes a generally open interior in which a plurality of filter bags (50) are disposed to partially clean a gas stream. The gas stream is communicated to the bag filters (50) through an air intake (46). The air intake (46) is in the form of perforations in the side walls (44) of the filtering station (10). The station (10) includes HEPA-filters (60) which receive the partially-cleaned air from the bag filters (50). The HEPA-filters (60) clean the air to a clean-room environment. A fan (30) draws a constant volume of air through the filtering station (10) and exhausts the clean air into the room. In operation, a constant volume of air is drawn into the filtering station through the side intake panels. The air is communicated to a first filter station which is in the form of bag filters. The air is then passed through a HEPA-filter stage for further cleaning and exhausted to the room.

Abstract: A mixing chamber for mixing gases produced in a gas producer in combination with a dust cyclone, the mixing chamber comprising a housing having at least two inlets and a perforated hood structure covering one of the inlets. In use the gas delivered from the dust cyclone through the covered inlet is distributed into a plurality of small streams directed into the supply of gas through the second inlet thus enhancing the mixing of the gases.

Abstract: Cyclone separator for separating solid particles from particle laden gas having an outlet pipe assembly which includes a pair of co-axial outlet pipes spaced radially apart from each other to form an annular passage therebetween. The passage is connected through a so-called aspiration effect or jet pump effect type of suction device to ports located around the outlet pipe assembly. The outermost portion of a spiral upward flow of gas in the outlet pipe assembly which includes a substantial part of the particles contained in the upward gas flow in the outlet pipe assembly is drawn into the passage between the outlet pipes without disturbance of the upward flow and returned back and discharged through the ports around the outlet pipe assembly into a separating chamber to disturb the outer surface of the outlet pipe assembly thereby to prevent formation of a boundary layer on the outer surface of the outlet pipe assembly.

Abstract: A lead-splash condenser for condensing metal vapor from a hot gas stream, comprising a plurality of condensation chambers, spray generating means provided in each condensation chamber, an inlet for passage of a hot gas containing metal vapor to the first condensation chamber, an outlet for passage of the gas from the last condensation chamber, and a stack communicating with the outlet of the last condensation chamber, wherein the stack is provided with gas deflector means for deflecting the gas stream from the side wall of the stack facing the outlet of the last condensation chamber so as to obtain a more uniform gas distribution in the stack, and to thereby reduce the rate of droplet elutriation in the gas stream leaving the condenser.

Abstract: A cyclone-type particulate collector and concentrator is provided wherein the outlet tube is provided with a conical concentrator having its sidewalls formed of a plurality of tapered, spaced, nested, generally U-shaped and cross-section vaned members between which the gas entering the outlet tube must pass in flowing to the outlet end of the outlet tube. A portion of the sidewall of the outlet tube of the cyclone-type particulate collector is provided with a gate to act as a particulate skimmer which opens into the gas inlet volute for recirculation of the skimmed particles.

Abstract: Cyclone separator for separating solid particles from particle laden gas having an outlet pipe assembly which includes a pair of co-axial outlet pipes radially spaced apart from each other to form an annular passage therebetween. A plurality of accelerating air supplying nozzles are provided around the outer pipe of the outlet pipe assembly. A blower is provided to supply air under pressure to the annular passage and the nozzles. The air under pressure is discharged from the nozzles along the outer surface of the outlet pipe assembly in the same direction as that of a spiral downward flow of particle laden gas thereby accelerating the spiral downward flow and disturbing the outer surface of the outlet pipe assembly to prevent formation of a boundary layer.