Abstract: The invention relates to a vacuum cleaner filter bag, including an inlet opening (3), a filter bag material which has an inner layer of nonwoven material (10) at least in the region of the inlet opening, and a holding plate (2) which is arranged on the outside of the filter bag in the region of the inlet opening, can be attached to a vacuum cleaner holding means for securing the vacuum cleaner filter bag and on which a closure device (4) for closing the inlet opening is provided, wherein the nonwoven material, in the region of the inlet opening, has a surface (20) which is provided in such a manner that the formation of a filter cake on said surface is avoided.

Abstract: A vacuum cleaner filter bag with an inlet opening and a deflection device arranged in the area of the inlet opening, which is configured in such a way that an air stream flowing through the inlet opening can be deflected.

Abstract: A mobile debris collection machine which has an improved filter system includes a chassis, wheels for supporting the chassis, an operator controlled debris pickup on the chassis and a debris container on the chassis. There is a vacuum system for carrying debris from the pickup to the container, with the vacuum system including a vacuum fan located above the debris container for creating an air stream that moves dust and debris from the pickup toward the container. A filter system for removing dust and debris from the airstream includes a first filter stage formed of a rotating perforated member, a second filter stage that is located downstream of the vacuum fan and includes a mesh filter bag, and a third filter stage, located downstream from the second filter stage and including a pleated panel filter.

Abstract: A vacuum cleaner having a dirt collecting system including a latch to seal a positively pressurized dirt cup. The latch also serves to secure the dirt cup to the cleaner housing when in the closed position. The dirt cup is formed with a first dirt collecting chamber and a second dirt collecting chamber separated by an apertured wall. An inlet opening is formed in the dirt cup and communicates with the first dirt collecting chamber for inputting a stream of dirt laden air into the first dirt collecting chamber. An exhaust opening is formed in the second dirt collecting chamber for allowing the filtered air stream to exit the dirt cup. The aperture wall includes a pre-filter for filtering coarse particles from a stream of dirt laden and depositing the coarse particles in the first dirt collecting chamber. A filter member is positioned within the second dirt collecting chamber and communicates with the exhaust port.

Abstract: A cyclonic dirt cup assembly for a vacuum cleaner has a generally conical truncated cone positioned within a dirt cup of the vacuum cleaner. The dirt cup has a wall formed with an air inlet opening for receiving a stream of dirt-laden air within the dirt cup. The cone is pivotally connected to a frame member which is removably mounted within the dirt cup. A baffle extends outwardly from a wall of the cone and is positioned adjacent the air inlet opening of the dirt cup for directing the stream of dirt-laden air in a cyclonic manner. The baffle includes a top wall, a side wall and a bottom wall. The baffle walls, the wall of the dirt cup and a wall of the cone form an air directing compartment which receives the dirt-laden air input through the inlet opening.

Abstract: My invention comprises a two element filter bag which includes a cylindrical outer element, a generally tubular inner element, a joining means, a securing means, and a diverting means. Cylindrical outer element is hollow, constructed of suitable filter media, and has first and second open ends. Tubular inner element is also hollow, constructed of suitable filter media, and has one closed end and one open end. Tubular inner element is positioned within cylindrical outer element so that the first open end of the outer element is generally coplanar with the closed end of the inner element, and the second open end of the outer element is generally coplanar with the open end of the inner element. Joining means joins the second open end of the outer element to the open end of the inner element. Supporting means is positioned within the inner element through open inner element end and provides support to inner element.

Abstract: A vacuum producing apparatus includes a bag separator having a cylindrical housing containing a plurality of filter bags supported by and extending between upper and lower bag heads. A radially disposed inlet conduit projects through the wall of the separator below the lower gab head to direct incoming air toward an expendable target plate releasably retained in depending relation to the lower bag head. A multi-stage blower connected to the separator evacuates air from it and has a mounting base which comprises a silencer and defines an exhaust passageway communicating with the interior of the blower casing for discharging air from and below the casing.

Abstract: A dust collector including a plurality of filter units and an arrangement for periodically providing reverse flow through a single filter unit to remove dust therefrom while maintaining normal flow of air through the remaining units. The filter units are connected to a plurality of ducts, and a centrifugal fan is provided for effecting reverse flow of air through the ducts sequentially to remove collected dust from the filter units. A transverse duct extends transversely of and contiguous to the first-mentioned ducts. A plurality of openings are provided for selective communication between the transverse duct and the first-mentioned ducts.

Abstract: A filter system wherein a cylindrical shell having open ends and a gas-impervious wall with means for supporting a filter tube coaxially within the shell to form an annular chamber therebetween has means for securing the filter tube to the other open end, such that gases from the enclosure must pass through the filter tube into the annular chamber and then out of the cylindrical shell. A jet pulse means is provided to provide a jet pulse of fluid to the annular chamber to flex the filter tube inwardly to dislodge solids collected on the interior surface of the filter tube.

Abstract: A connector for connecting a filter bag to the suction inlet of a vacuum cleaner. The filter bag connector includes a dirt interceptor extending across the air flow path from the suction inlet to intercept high speed dirt particles at the center and upper center portion of the air flow path, absorb kinetic energy therefrom, and deliver the intercepted dirt particles into the substantially unimpeded lower and side portions of the air flow path for delivery with the slower moving dirt particles therein freely into the filter bag. Resultingly, abrasion of the filter bag is effectively minimized for providing extended useful life of the filter bag. In the illustrated embodiment, the dirt interceptor includes an upper flat portion and a lower flat portion extending at different angles to the perpendicular to the flow path. In the illustrated embodiment, the dirt interceptor tapers across its width and in thickness toward the distal end thereof.

Abstract: Apparatus for filtering air laden with dust or other particulate matter including: a filtering area, an air velocity dissipation zone above the filtering area, a lower tube sheet mounted above the dissipation zone and forming a partial boundary therewith, an air plenum mounted above the lower tube sheet, the air plenum including an air inlet for receiving dust laden air, an upper tube sheet forming an upper boundary of the air plenum, the lower tube sheet including a plurality of holes, the upper tube sheet including a plurality of holes vertically aligned with the holes in the lower tube sheet, a plurality of clean air outlet tubes having upper end, main body and lower end portions, the upper end portions being mounted within the holes in the upper tube sheet, the main body portions extending through the holes in the lower tube sheet, the lower end portions extending beneath the lower tube sheet and ending in a horizontal plane at the interface between the dissipation zone and the filtering area, a plurality

Abstract: Powder collectors for the automatic collection and recycling of powders such as in a powder coating booth are disclosed. The collectors utilize a rollaway collection assembly having one or more cartridge filters therein so as to allow the quick change of vector assemblies on the coating booth for color change convenience. The cartridges themselves may also be readily changed as they preferably are not rigidly mounted to the collection assembly but instead merely sole positioned therein as to become functional upon turning on the air flow for the collection system. Continuous operation is provided by periodic blow-down of the cartridges with a fluidized bed providing automatic recycling (or disposal in the case of dust collection systems) of the collected powder. Various embodiments are disclosed including one embodiment utilizing envelope filters with an automatic blow-down provision.

Abstract: Apparatus and method operating at relatively low pressure drop and low initial velocity for removing pollutants down to sub-micron sizes from gas streams comprising a nozzle means accelerating the gas flow and impinging the pollutants upon a plate for removal of a major portion of pollutants and then passing the gas stream through fabric filters for removal of substantially all of the remaining particulate pollutants.

Abstract: A cell filter apparatus of the bag or stocking type having a housing is disclosed. A gas deflector and boundary wall between a raw gas duct and a dust chamber upstream from the filter cells form a tapering duct having an outlet passage for coarse dust particles at its narrow end. Either the deflector or the boundary wall is pivoted so that the size of the outlet passage can vary so as to remove coarse dust from the outlet passage. A gas blast for cleaning the filter cells in a direction to move the pivoted element so that the outlet passage is varied and cleaned.

Abstract: The open end of a dust bag in an upright tank type vacuum cleaner is detachably fastened to a frame fitting within and against the upper face of a ledge in the tank. A deflector skirt spaced from the tank wall is fitted against the lower face of the ledge and the frame and skirt are held against the ledge from opposite sides by spring catches mounted on the inside surface of the deflector skirt and engaging the frame. Those catches are accessible from the bottom of the deflector skirt when the dump bucket forming the bottom portion of the tank is removed.

Abstract: A vertically oriented, sheet metal enclosure includes a frusto-pyramidal lower section forming a hopper for separated particulate matter from an air stream which enters a middle section from a downwardly and inwardly inclined inlet duct fixed to one side of that section at the upper end, causing impingement of the airborne particles against the side of the hopper to effect a swirling action to the air stream. An array of laterally spaced, inclined baffle plates at the upper end of the middle section separates the middle section from an upper section which carries tensioned tubular filter bags. An enclosure cover defines an outlet opening feeding to a cover mounted blower.