Abstract: A backpack dust collector includes a housing and a filter. The housing includes a suction port, a dust collecting chamber connected to the suction port and accommodating a dust collecting bag, a motor chamber connected to the dust collecting chamber and accommodating a fan and a motor, and an exhaust port through which air from the motor chamber is discharged. The filter is disposed on a side of the dust collecting chamber so as to face the dust collecting chamber.

Abstract: A surface cleaning apparatus comprises an air treatment member having an air treatment chamber. A moveable member is positioned in the air treatment chamber. A driving assembly is drivingly connected to the moveable member wherein the driving assembly is reconfigurable between a stored position and an operable position in which the driving assembly is operable to longitudinally translate the moveable member through at least a portion of the chamber.

Abstract: A stackable, portable air filtration unit utilizing a molded plastic central housing, injection-molded plastic inlet and outlet covers and accommodating a high-efficiency particulate air (“HEPA”) filter or other high efficiency particulate filter, a secondary filter and a pre-filter. The unit is versatile and flexible in that different motorized impellers can be used alternatively, depending on the desired specifications.

Abstract: A filter for use in a washing appliance is disclosed. The filter includes an inlet, an outlet, a filter chamber and a mesh strainer placed between the inlet and outlet. The mesh strainer strains water or liquid flowing into the filter as the water flows into the inlet and out of the outlet. The mesh strainer filters out particulate matter from the flow through the filter. The liquid flowing into the filter flows across the mesh to clean the filter and dislodge at least some of the particulate matter trapped in the mesh. The filter chamber includes at least one baffle within it. The baffle divides the filter chamber into an upper portion and lower portion. The particulate matter washed off collects in the lower portion of the filter chamber due to rotational flows created in the filter due to the filter chamber boundaries and the baffles.

Abstract: A system includes a resonant frequency modeler for determining a resonant frequency of a node on a collecting plate that collects particles from a gas flow; and a wave generating device that applies a wave having an applied frequency substantially equal to the resonant frequency to the node of the collecting plate to remove particles from the collecting plate. An electrostatic precipitator (ESP) including the system and related method are also provided.

Abstract: In one aspect, the present invention provides a filter cleaning mechanism comprising: a filter material (37) for filtering out dust and dirt particles from air passing therethrough; a frame (32, 34, 35, 38, 39) for supporting said filter material (37); devices (31, 296; 25a, 25b, 25c, 25d) for mechanically agitating said filter material to dislodge dust and dirt particles therefrom; wherein the devices for mechanically agitating said filter material comprises elements (31, 296; 25a, 25b, 25c, 25d) for deforming said frame within its elastic limit and elements (31, 296; 25a, 25b, 25c, 25d) for rapidly releasing said frame from said deformation to cause said frame to relax to an undeformed state.

Abstract: A cyclonic chamber for use in air filtration devices. The chamber includes an apex opposite a base with sidewalls extending therebetween. The cyclonic chamber is preferably parabolic in cross-section or tubular with a hemi-spherical cap. The base contains an outflow passage and a conical filter extending therefrom. An inflow passage is provided proximate the apex. The inflow and outflow passages are parallel but not aligned. The chamber interior is smooth. The smooth interior and offset relationship of the inflow and outflow passages causes air to take a cyclonic path between the inflow passage and the filter. Debris in the airstream is pushed outward—away from the filter—by centripetal force. Eddies form proximate the base. Debris escapes the airstream there, where it either remains or, depending upon the chamber's orientation relative to gravity, falls back into the airflow where it is again directed away from the filter.

Abstract: A system for removing matter from a filtering device is disclosed. The system may have an impact wave generating device. The system may further have a vacuum source to draw matter away from the filtering device.

Abstract: A collapsible filtration tank for a dust collector includes an outer frame, an engaging base and a filter. The outer frame is formed cylindrical, having plural meshes formed in its circumferential wall. The engaging base is formed annular, installed around the opening of the outer frame. The filter is inserted in a chamber of the outer frame and restrictively blocked by the blocking edge of the engaging base. Thus, the filter can be independently replaced with a new one instead of shifting the whole filtration tank.

Abstract: A dust collector includes a shell, an exit tube, an inner tube, a suction device, a first dust container, a bypass tube and a first dust bag. The shell defines a first receiving room therein. The exit tube defines an exit passage therein. The inner tube defines a connection passage which has a first opening and a second opening. The first opening communicates the first receiving room, and the second opening communicates the exit passage. The suction device provides the exit passage with a negative pressure. The first dust container defines a second receiving room therein. A mesh is disposed on a bottom surface of the first dust container to divide the second receiving room into a first chamber and a second chamber. The bypass tube defines a bypass passage therein, and it communicates the connection passage with the second chamber. The first dust bag is disposed in the first chamber.

Abstract: A filter assembly comprising a housing having an air inlet and an air outlet and a filter chamber disposed between the inlet and the outlet, the housing having an air flow path there through. A filter element having a first surface area maybe located within the filter chamber and oriented such that the first surface area is angled with respect to the air flow path. The filter element may comprise a filter media adapted to remove contaminants from the air. A drain may be associated with the housing and adapted to remove contaminants filtered out of the air.

Abstract: In one aspect, the present invention provides a filter cleaning mechanism comprising: a filter material (37) for filtering out dust and dirt particles from air passing therethrough; a frame (32, 34, 35, 38, 39) for supporting said filter material (37); devices (31, 296; 25a, 25b, 25c, 25d) for mechanically agitating said filter material to dislodge dust and dirt particles therefrom; wherein the devices for mechanically agitating said filter material comprises elements (31, 296; 25a, 25b, 25c, 25d) for deforming said frame within its elastic limit and elements (31, 296; 25a, 25b, 25c, 25d) for rapidly releasing said frame from said deformation to cause said frame to relax to an undeformed state.

Abstract: A portable dust collection system for a wood shop or other dust producing environment is employed with a sander, power saw, router or other dust-producing tool such as a woodworking tool. A movable platform has a vertical intake pipe supporting a head portion formed with a shroud. A centrifugal impeller drives the intake air stream plus any entrained particles into one or more cyclonic separators, which deposit the dust in a respective drum supported on the platform beneath the cyclone. The air inlet from the tool enters the vertical pipe at a point partway up the pipe, so that large particles drop to the bottom end of the pipe, where a clean-out door is provided. The exhaust or discharge air from the cyclonic separator(s) passes out through a filter cartridge to the ambient. A deflector plate prevents the dust from eddying back into the separator.

Abstract: According to the present invention, a bagless vacuum cleaner includes a dust chamber, a primary filter and a second filter. The dust chamber includes an entrance and an exit. The primary filter is disposed in the dust chamber between the entrance and the exit and the second filter is disposed between the entrance and the primary filter. The second filter removes at least some contaminants from the air passing through the entrance. A user can selectively replace the second filter with a new second filter.

Abstract: A bagless vacuum cleaner (10) includes a nozzle assembly (16) having a suction nozzle for picking up dirt and debris from a surface to be cleaned and a canister assembly (18) including a cavity (32). A dust collection assembly (12) is received and held in that cavity (32). The dust collection assembly (12) includes a filtering subassembly (100) and a dust container (102). The dust container (102) has an open top (104), a bottom wall (106), a first cylindrical sidewall (108), an inlet (110), and a downwardly directed outlet (112) extending through the bottom wall. An airstream conduit is provided for conveying a vacuum airstream between the suction nozzle and the inlet. A filter (124, 138) is carried on the filtering subassembly (100). A sweeper (200) rotates relative to the filtering subassembly (100) to clean dirt and debris from at least a portion of the filter (138).

Abstract: A dust and dirt separation assembly for use in a vacuum cleaner having a housing having a dirt collection chamber, a dirty air inlet, a clean air outlet, and an airflow path existing therebetween, a first separation means for separating articles of dirt from dirty air entering the housing, a filter element for separating smaller particles of dust from the dirty air, a selectively manually operable mechanical actuation mechanism including a snap-acting resilient element that changes from a first stable condition to a second condition when a sufficient force is applied, and an impact member actuable by the mechanical actuation mechanism to strike the filter element thereby dislodging dust particles therefrom to be collected in the dirt collection chamber.

Abstract: A filter for filtering dust-containing air including a filter insert (2) and a cleaning device (3) having a contact element (6) mechanically contacting the filter insert along an end edge (4a/4b) of a folded dust filter element (5) forming part of the filter insert.

Abstract: In an electric vacuum cleaner, in a suction air passage provided between a nozzle unit having a nozzle and an electric blower for producing a suction air flow, a separator for separating dust from the suction air flow is arranged. In the separator, a dust collection chamber for collecting the separated dust is provided. The separator is fitted with an exhaust tube having an outlet, fitted with a filter, formed in the peripheral surface thereof so that the suction air flow is exhausted out of the separator through the exhaust tube to the downstream side of the suction air passage. The separator is fitted with a cleaning member having a brush for cleaning the filter. When the cleaning member is moved with the brush keeping contact with the filter, the dust that has settled on the filter is raked off. The cleaning member is moved through manual operation, with a motor, or by the suction air flow.

Abstract: A dirt collecting system for a vacuum cleaner includes a dirt cup formed with a coarse particle separation chamber and a fine particle separation chamber separated by an apertured wall. Coarse dirt particles directed into the coarse particle separation chamber are prevented from entering the fine particle separation chamber by the apertured wall. The apertured wall is removable from the dirt cup and is cleaned upon removal by a cleaning element. A fine particle filter is located in the fine particle separation chamber for filtering fine particles. The fine particle filter is cleaned by rotating a knob located in the dirt cup lid so that the pleats of the fine particle filter is brushed past a wiper element.

Abstract: A method of using vacuum-cleaner filters includes mounting a cylindrical-shaped filter cartridge coaxially on a rotatable spindle. Then air is drawn radially through a filter material wall of the filter cartridge. Periodically, the cartridge filter on the spindle is spun to dislodge any debris entrapped in the filter material by centrifugal force. Air flow is selectively drawn or pushed radially through a filter material wall of the filter cartridge. A clutch disposed between a motor and the spindle is used to periodically spin the cartridge filter on the spindle to dislodge any debris entrapped in the filter material by centrifugal force. Preferably, a motor that can be run in either a forward direction or a reverse direction is used.

Abstract: A dust-collecting device for a vacuum cleaner comprising a dust-collecting case which is fitted into a suction path extending from a suction nozzle to a motor fan and from which accumulated dust can be discharged by opening a bottom lid of the dust-collecting case, and a cylindrical filter fitted into the dust-collecting case. The filter is arranged to be rotatable, a spiral rib is formed at an outer periphery of the filter, and the device is equipped with a rotating means for rotating the filter. Dust which cannot be discharge by its own weight since it is in a compressed state can be pushed out through the spiral rib formed on the outer periphery of the filter by rotating the filter, so that dust accumulated within the dust-collecting case in a compressed state can be easily discharged.

Abstract: A filter cleaning system for a vacuum that includes a housing that is open across its top end and is arranged to be covered by a removable lid whereon is mounted a vacuum source. The housing includes a hose port for connection to a vacuum hose, and the housing can be mounted on wheels, casters, or the like. A double filter system, that includes separate primary and secondary filters, is arranged within the housing, with the secondary filter mounted across the vacuum source inlet, and with the primary filter, that is a bag connected to the lid undersurface, for containing the secondary filter and a filter support. The filter support is a rigid fame connected at a fight angle to an end to a straight rod that extends through the lid to be manipulated by an operator to move the filter support so as to engage surfaces of both the primary and secondary filters, to vibrate and shake collected particles therefrom.

Abstract: An apparatus and method for filtering a fluid containing contaminants is provided whereby the apparatus includes an inlet for drawing fluid from a fluid source, a housing having attached thereto the inlet, a contaminant outlet, a clean outlet, a filtering assembly and a mechanism for agitating the filtering assembly. The filtering assembly has an upper or upstream end connected to the inlet and a lower or downstream end connected to the contaminant outlet. The filtering assembly is disposed within the housing and is connected to the contaminant outlet whereby fluid is introduced to the filter assembly at an upper end of the filtering assembly by the fluid inlet and whereby fluid is passed through the filtering assembly to provide clean, filtered fluid which is discharged via the clean outlet, and debris and other contaminants contained in the fluid are separated from the fluid and retained by the filtering assembly.

Abstract: A method which provides purification of waste gases by adding particles of reagent and/or absorbent, which react with the pollutants in the waste gases, to the gases, and by introducing the gases into a wetting reactor for activating the reagent or absorbent contained in the gases. Gases are conveyed to at least two levels in the reactor through inlets so that a first portion of the gases is introduced into a wetting zone and a second portion of the gases below the wetting zone. A high density of particles is maintained in the wetting zone by recycling to the wetting zone particles separated from the gas above the wetting zone.

Abstract: A vacuum consisting of a canister housing that is open across its top end and is arranged to be covered by a removable lid, which lid mounts a vacuum source. The canister housing includes a hose port for connection to a hose that mounts a nozzle on the end thereof, which hose and nozzle are preferable formed of a fireproof or flame retardant materials that will not be damaged by a passage of warm, hot and even burning coals therethrough. Which canister housing can be mounted on wheels, casters, or the like. A double filter system of the present invention is arranged within the canister housing, attached to the lid undersurface, to extend across the vacuum source inlet, which filter system consists of an inner or secondary filter for closely fitting across the vacuum source inlet, and is primarily a dust filter, with an outer or primary filter mounted to the lid, over the inner or secondary filter, with an open box frame arranged therebetween.

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 filter for use in a dry powder spray booth that includes a frame containing a quantity of pleated filter sheet material. The ends and sides of the pleated sheet are secured in the frame by a sealant. The material forming the pleated sheet is a fiber paper having a smooth and rough side and is treated with a flame retardant coating. The surface area of the pleated sheet is varied between five and ten times the interior area of the frame. The smooth side of the fiber paper faces upstream with respect to the air flow and the filter is positioned at an acute angle to the vertical with the top inclined upstream. The frame is provided with a manual vibrator and an expanded wire mesh on the downstream side.

Abstract: The specification discloses a wheeled commercial carpet vacuum cleaner having wide area coverage, an integral one piece molded polymer housing enclosing a debris hopper with a plurality of inverted filter tubes therabove and enclosed by a filter housing in engagement with the hopper. The open bottom filter tubes are normally retained up in extended condition by springs therein which are compressible under the action of a manually operable depressor plate, plunger and linkage via an external handle, to act as a shaker distorting the tubes to dislodge dirt from the filter inner walls and allow it to fall into the debris hopper. One or more vacuum motors and suction fans are operable connected to the filter housing. A vacuum conduit extends between the area adjacnet a carpet-engaging power brush and the debris hopper. The suction fans pull dirt-laden air from the brush area through the tube and into the hopper, and from there up through the filter tubes.

Abstract: A bag separator having a bag housing containing a moveable bag head supporting a plurality of depending filter bags includes a bag shaker which may be readily provided for either manual or power operation. Parts of the shaker mechanism are common to both the manually operated bag shaker and the power driven bag shaker so that a manually operated bag shaker may be easily retrofitted for power operation.

Abstract: A batch-action apparatus for filtering a fluid medium comprises a hermetically sealed housing (1) communicating with systems (9, 10 and 11) for feeding the fluid medium, discharging the clean medium, and evacuating filter cake.The housing (1) accommodates a flexible filter hose (2) one end (4) of which is turned inside out and attached to the housing (1), whereas the other end (7) thereof is connected to a hoisting mechanism (3) acting to move the hose (2) relative to the fixed end (4) of this hose. The end (4) of the hose (2) turned inside out forms an annular cavity (8) to which the fluid medium is fed and which varies in volume under the action of filter cake build-up or in response to the movement executed by the hoisting mechanism (3).

Abstract: An ash vacuum adapter for connection to a vacuum source to pull warm to even hot and burning ashes and small coals through a fire retardant hose, the ashes and coals deposited in a canister housing that is supported on rollers or casters. The vacuum source is connected to the canister housing to pull a vacuum through a flexing filter that is arranged in the canister housing, which flexible filter is formed from a cylindrical sleeve manufactured from a fireproof or flame retardant material that is closed across a bottom end by a metal base. The vacuum source is directed through the cylindrical sleeve that includes a dew-rod fitted therethrough that has one end connected to the metal base, the other dew-rod end extending beyond the canister housing lid for manual movement.

Abstract: An apparatus for cleaning air filters by a combination of vibration, air pressure, and suction. A support member includes a first inclined wall sloped more steeply than a second inclined wall, providing generally V-shaped supporting surfaces which cause the filter being cleaned to rotate as it is vibrated. The vibration of the filter also loosens trapped impurities therefrom, and this vibration is enhanced by resiliently suspending the support member from a housing. The loosened impurities fall down the slopes of the inclined walls and are removed by suction provided in a channel extending lengthwise along the bottom of the support member. An exhaust blower is connected to a port in the suction channel to apply suction to the filler and to remove loosened impurities. The exhaust blower is also connected to an inner suction tube, which applies suction to an inner periphery of the air filter.

Abstract: The apparatus comprises a hermetically sealed hollow housing (1) accommodating in the interior thereof a flexible filtering member (2) in the form of a hose, the ends of which are turned inside out and attached to the periphery of the inside surface of the housing (1). Cavities (3,4) formed between the hose (2) and housing (1) communicate with a discharge device (8) for discharging the fluid medium being cleaned.Provided in the interior of the housing between the fixed ends of the hose (2) is a partition wall (9) having a slot-shaped opening (10) for the passage of this hose and dividing the interior of the housing (1) into two chambers (12, 13). Each such chamber (12, 13) is connected to the feeding device (17, 21) for feeding the fluid medium being cleaned and to the evacuation device for evacuating filter cake.

Abstract: A body of a vacuum cleaner comprising three subassemblies, i.e., a front subassembly, a central subassembly, and a rear subassembly. The front subassembly stores the matter drawn through a suction port formed in a suitable position. The central subassembly can be connected and disconnected with the front subassembly and has an evacuating device therein. The rear subassembly is connected to the central subassembly by coupling members and acts to cover the back side of the evacuating device incorporated in the central subassembly.

Abstract: The shaking mechanism for the filter bags in the dust removal section of an abrasive blast cabinet includes a shaker rod from which the filter bags are suspended. The shaker rod is mounted for both axial movement along and rotational movement about its longitudinal axis and is axially reciprocated in response to rotating an operating handle located at the front of the cabinet in opposite directions. During axial movement of the shaker rod, a laterally extending follower member rides along oppositely inclined cam surfaces on laterally spaced ramps, causing a simultaneous rotation of the shaker rod and thereby imparting both lateral and longitudinal shaking movement on the filter bags to improve the shaking action for dislodging particulate material collected on a surface of the filter bags.

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

Abstract: A dust-collector of the bag filter type to filter and trap dust and other solid material entrained in flue gases uses a plurality of bags suspended in an array to cooperate with a shaking mechanism. Each bag has an open bottom end and is suspended resiliently taut and in communication with an inlet gas-duct at the bottom; the top of each bag is closed and is exposed to a suction line for venting filtered gases. Periodically, rinsing air is fed into the bags from the suction line to dislodge solid particles and dust deposited on the inner walls of the bags; simultaneously, the bags are given a jolting tipping movement by a gang-operated mechanism which may be manual.

Abstract: A vacuum cleaner having a rotor which is mounted to turn at the inside of a filter bag of the device, and which acts when turned to contact the bag and displace accumulated dust from its outer surface. The rotor may be actuable from the outside of the cleaner when a cover of the cleaner is in closed active condition. The rotor desirably includes one or more resiliently flexible arms which are deflectable to a reduced diameter condition by the bag when the bag is constricted inwardly against and about the rotor by the flow of suction air when the device is in use.

Abstract: A portable filter bag house assembly includes a collapsible main frame, a plenum chamber attached to the main frame, and a sub-frame carried by the main frame for shaking movement, the sub-frame supporting filter bags to extend toward the plenum chamber for communication therewith.