Abstract: Industrial filter for separating solid particles from a streaming gaseous medium the filter having a filter insert formed from a single band of knitted fabric. The filter insert is provided with a smooth permeable layer of amorphous synthetic polymeric material at least on its inlet inside. Longitudinal and transverse packing sleeves of the filter insert are secured to marginal surfaces of a partition wall by means of a pressure sealing frame. Single filter pockets are inserted in the openings of the partition wall and in place between single filter pockets the filter insert sliding rests upon internal surfaces of the partition wall. During operation a certain amount of separated dust is forced into the gaps between the internal surfaces of partition walls and parts of the filter insert surfaces supported by those internal surfaces. Whereby the accumulated dust layer automatically compensates for the stretching of the needled fabric.

Abstract: A built-in vacuum system which has improved vacuum drawing capability, an improved filtering system, and an improved vacuum hook-up arrangement. The built-in vacuum apparatus comprises in combination: (a) a container having therein at least one vacuum inlet port and one vacuum outlet port; (b) means for drawing a vacuum upon the vacuum inlet port, and exhausting drawn air through the vacuum outlet port; and (c) a particle filtering medium which is so disposed within the container that none of the effective filtering surface of the filtering medium contacts the container when a vacuum is drawn upon the system by the vacuum drawing means. The apparatus includes removable air-tight vacuum inlet post fittings and detachable attachments for installing one or more vacuum drawing means in the apparatus.

Abstract: A dust collector including two tubes which communicate through an interconnecting conduit. A first tube operates as a cyclone which separates a great fraction of dust or solid components from the incoming air and collects the same in a bag at the bottom of the tube. The second tube includes a filter unit composed of a coarser filter as well as a surrounding fine filter, the filter unit receiving the pre-purified air from the cyclone tube through the interconnecting conduit and separating the remaining dust particles therefrom.

Abstract: A filter module comprises a frame bridged by a plurality of spaced-apart arch members, on which is supported a one-piece filter element comprising a plurality of pockets which each enshroud an arch member, and which connect into a mouth portion circumscribing the frame and held in position by a drawstring. The filter module is easily erected, and a seal between the inlet and outlet sides of filter equipment employing the module is easily provided.

Abstract: A pocket filter cartridge for removing solid particulates from a dirty gas stream including a plurality of sheath-like filter bags suspended from a common header assembly in side-by-side relation. Each of the filter bags includes a plurality of alternating rows of filamentary stays or span stitching spaced across the width of the bag and extending generally parallel to one another along its length so that upon inflation of the bag by the dirty gas stream during use, the stays shape the bag into a plurality of adjacent tube-like sections opening into one another within the bag. The stays in each row are sized to be of a different length than the stays in the rows adjacent to it to alternately vary the thickness of the bag at the juncture of the tube-like sections formed in the bag.

Abstract: A dust collecting apparatus with quick release filter support system comprising an enclosure, a bulkhead structure mounted to the interior walls of said enclosure, and defining upper and lower portions of said enclosure, means for the intake and exhaust of air from the surrounding environment in a single direction, a filter cloth assembly comprising a filter cloth affixed to and supported by a frame assembly inserted into said enclosure, and quick release clamping means used to bring said frame assembly into an air tight sealing arrangement with said bulkhead.

Abstract: A pocket filter cartridge having a plurality of side-by-side filter assemblies secured to a common mounting frame adapted to be secured across a dirty gas stream in a gas duct. Each of the filter assemblies includes a sheath-like filter bag suspended from an apertured header plate which is secured to the mounting frame in an overlapping fashion with its adjacent mounting plates to form a common header for all of the filters in the cartridge.

Abstract: A vacuum cleaner has an elongated porous outer bag for holding a filter bag over an air outlet. A hanger within the outer bag is positioned to suspend the outer bag from the vacuum cleaner, as well as to hold a pocket within the outer bag, so that spare filter bags may be held within the porous outer bag.

Abstract: A compressible dust container for a vacuum cleaner, which is compressed by means of a device that causes a change in pressure between the outside and inside of the dust container, as well as agitating the container. The dust container is then able to be filled to substantial capacity without a false reading on the dust indicator of the vacuum cleaner.

Abstract: There is disclosed a vacuum cleaner bag assembly for an upright vacuum cleaner comprising a flexible, air-permeable, outer bag having an upper end adapted to be attached to a handle of a vacuum cleaner. The other end of the outer bag has an open mouth attached to an open mouth of a dirt-collecting box. The dirt-collecting box has a suction inlet opening and also a suction outlet opening which comprises its open mouth. A tube closes the open mouth of the box and is in fluid communication with the box and extends toward the top of the outer bag. A disposable inner bag is provided within the outer bag and has an inlet opening in fluid communication with the tube. A vacuum cleaner provided with the bag assembly may be operated as a vacuum cleaner with a disposable bag with all of the foregoing elements in place, or as an air-permeable outer bag filter vacuum when the tube and disposable bag are removed.

Abstract: A filter element utilizes a perforate inner filter tube sock tightly fitted within an outer perforate support tube sock, the two socks being sealably mounted at their open ends to a tube sheet with the support tube held in tension by the pressure differential across the filter tube during operation of the associated filter.

Abstract: A vacuum cleaner filter bag assembly is provided for protecting against atmospheric contamination upon removal of the filter bag from a vacuum cleaner. The filter bag assembly includes a primary filter bag, an airtight shield, a secondary filter bag and a tertiary filter. The shield and secondary filter bag are connected so as to define a sealed enclosure within which the primary filter bag is disposed. The primary filter bag has an inlet opening but is otherwise sealed closed. An inlet opening formed in the shield is aligned with the inlet opening of the primary filter bag so that the suction hose of the vacuum cleaner directs air with entrained particulates directly into the primary filter bag. The air which passes through the primary filter bag is next passed through the secondary filter bag.

Abstract: An exchangeable filter element is disclosed. The filter element is especially adapted for nuclear installations for the purification of gas streams which contain toxic or radioactive matter. A method is also disclosed for the exchange and disposal of contaminated filter elements, which filter elements are reducible in volume for packing into waste containers.

Abstract: The present invention refers to the mounting of filter bags and the like of the kind comprising the mounting of such filter bags in a frame which holds them by means of a holding ring and which applies pressure against the outer walls of the frame, securing the lip of the bags between the body of the frame and the holding ring.

Abstract: A plurality of separate V-shaped wire mesh members are arranged and connected in side-by-side relationship to provide a plurality of V-shaped cells across an air stream. A W-shaped retainer or connector formed of perforated sheet metal has outer, downstream facing trackways which receive side edges of the wire mesh members, and a central, upstream facing trackway which receives and retains the free edges of V-shaped filter media bags which are inserted into the V-shaped cells overlying the wire mesh. A stabilizer bar extends across and attaches to the exposed adjoining edges of the V-cells to support the cells in proper relation and retain the filter media in place.

Abstract: A wet/dry vacuum apparatus is disclosed including a collection tank and a suction head. The suction head includes a base defining a tank inlet aperture, a blower intake aperture, a blower exhaust aperture, an atmospheric, intake-discharge aperture and an integrally molded valve housing. A blower is secured to the base in line with the intake aperture and includes an exhaust outlet connected to the exhaust aperture. The valve housing is opposite the blower and defines a tank opening communicating with the collection tank. A planar valve element is rotatably mounted within the housing and selectively permits communication of the blower intake with the tank for collection of debris and liquid or connection of the blower exhaust outlet with the tank to pressurize the tank and force the contents thereof out through the tank inlet.

Abstract: A lawn mower bag captures clippings and debris from the output of a lawn mower and may be carried at its rear. The bag includes an inlet adapted to be connected to the output of a rotary lawn mower and a large outlet opening for emptying of its contents. The portion of the bag forming the outlet opening is closed by and carried on the lawn mower through a plurality of hook-like fasteners arranged about the periphery of the outlet opening. The bag is easily fastened to and unfastened from the lawn mower and its contents can be emptied easily and controllably.

Abstract: A filter element having a bag of filter medium surrounded by an elastic net hose with a corrugated wall interposed therebetween.

Abstract: The air muffler is primarily designed to be carried by a snug fitting hood respirator adapted to fit over the head of a person and to dispense breathable air into the hood in a minimum quantity of at least four cubic feet per minute, with a controlled noise level not to exceed 80 decibels, and with varying air pressure of from 11 to 25 pounds per square inch. The muffler utilizes a non-absorbent porous resilient fibrous filter media within a tubular casing provided with a series of ports, with the casing located entirely within a bag made from a non-absorbent porous fibrous material. An air pocket is provided between the portion of the casing provided with the ports and the bag. The air is directed from the source through the casing where it is restricted as it passes through the non-absorbent porous filter media prior to escaping through the ports in the casing into the air pocket where the air is muffled and is finally discharged into the hood through the porous fibrous bag.

Abstract: A filter bag construction for filtering dirt, dust and other materials from the exhaust air flow of an upright vacuum cleaner, wherein an elongated, non-disposable outer fabric bag having a longitudinally extending delivery tube therein provides one stage of filtration and a disposable, inner paper filter bag provides a second stage of filtration. The filter bag construction may be used without the inner, paper filter bag when maximum filtration efficiency is not required or with the inner, paper filter bag when high filtration efficiency and/or the convenience of a disposable filter element is desired. When operating as a single stage filter, the upper end of a flow channeling conduit in the lower end of the outer bag is positioned in the lower end of the delivery tube and, when operating as a two-stage filter, the upper end of the conduit is shifted to another position in the outer bag so that unfiltered air from the cleaner is initially channeled into the inner filter bag.

Abstract: A vacuum cleaner dust bag that is constructed to substantially increase the filtering action of the bag and therefore is particularly adaptable for use in vacuum cleaners utilized in hospitals, nursing homes, and other health care facilities. The filter dust bag is constituted of two concentric sections or compartments with the space of one of the compartments having a dry filter mat material that effectively traps all dust and dirt particles down to minute particles of about 0.3 microns. The tube on the filter dust bag which connects to the discharge outlet of the vacuum cleaner is constructed of an air-impervious material, while the outer and inner layers of the filter are fabricated of air-pervious material of different elasticity.

Abstract: A device for recirculating warm, moist air from a clothes dryer exhaust into a room is attached to the standard vent pipe of the dryer. The device comprises a length of corrugated, sheet aluminum tubing having a substantially right-angled bend. One end of the tubing is placed on the dryer vent pipe. The opposite end of the tubing beyond the bend extends parallel to the side of the dryer and slips into a double ply, nylon mesh, filter bag. The bag is releasably secured to the end of the tubing with a resilient band which seats within an annular recess formed at the end of the tubing. The tubing has an approximately elliptical profile beyond the right-angled bend so that the dryer can be located close to an upstanding wall for best floor space utilization. The nylon mesh prevents sticking by lint and other materials exhausted by the dryer for easy emptying.

Abstract: A filter bag assembly for a vacuum cleaner is disclosed. The assembly includes an elongated, relatively rigid, hollow tube coupled at one end to the exhaust of a vacuum cleaner. The tube runs upwardly along the handle of the vacuum cleaner and is attached at its other end to a porous filter bag. The filter bag runs downwardly along the rigid tube and has an open end closed by a nonporous dirt-collecting bag. The tube, the porous bag, and the nonporous bag are encased in an envelope so that the nonporous bag is held in a collapsed or stored condition at the end of the filter bag during normal use of the cleaner. To empty the filter bag of its collected dirt, the envelope is opened to expose the nonporous bag and to permit the dirt in the filter bag to drop downwardly into the nonporous bag. The vacuum cleaner may be turned on and off a number of times to distend the bag and dislodge dirt from the filter bag during the emptying operation.

Abstract: A vacuum cleaner filter bag is made of a porous sheet of material which permits penetration and flow therethrough of air. The bag is generally horseshoe-shaped and has a comparably shaped internal cavity. The bag has two tubular leg portions and a tubular connecting portion between the leg portions. An air inlet opening is provided on the connecting portion for admitting a stream of air under pressure into the cavity and an opening, which permits removal of accumulated debris but which is closed during use of the bag, is also provided on the connecting portion. The air flow between the air inlet opening on the vacuum cleaner housing and the inlet opening of an exhaust motor situated within the vacuum cleaner housing generally tends to primarily penetrate or flow through a wall portion of the bag disposed between the respective inlet air openings.

Abstract: The improved dust bag is designed for use with an upright vacuum cleaner and is made of air impervious material. The lower end of the dust bag is connected with the base of the upright vacuum cleaner adjacent to the air discharge outlet of the vacuum cleaner. A first, relatively large opening is formed in the dust bag and defines the flow path through which air may flow out of the dust bag. An inner wall divides the interior of the dust bag into first and second compartments and includes a second opening which is aligned with and coincides, in size and shape, with the first opening and which permits air to flow from the second compartment to the first compartment. A filter is disposed in the first compartment adjacent to the first opening and is utilized to filter the air as it flows out of the dust bag through the first opening.

Abstract: A vacuum cleaning system includes a stationary built-in power unit, a portable vacuum unit, and a flexible hose connecting the power unit and vacuum unit. Dirt and other particulate matter sucked into the system is trapped within a collection chamber of the vacuum unit and air within the collection chamber is evacuated therefrom to pass through the hose and the motor of the power unit.