Abstract: A disposable dust bag for vacuum cleaners includes a mounting collar removably mounted on a vacuum cleaner connector through which dirt-laden air is delivered to the dust bag. The connector has a generally cylindrical outlet end and peripherally spaced projections extending from the outer surface thereof. The collar provides an opening sized to closely fit the outlet through the majority of its peripheral extent and which provides peripherally spaced enlarged portions adapted to clear the projections on the connector when the bag is installed and removed. The collar also provides an elastomeric diaphragm that tightly fits around the projections and forms a lip seal with the connector to prevent leakage of dirt-laden air back along the connector. An adaptor which fits on and grips the connector permits use of disposable bags with mounting structures not directly couplable with the connector.

Abstract: A disposable dust bag for vacuum cleaners and the like is disclosed which includes a mounting collar adapted to be removably mounted on a vacuum cleaner connector through which dirt-laden air is delivered to the dust bag. The connector has a generally cylindrical outlet end and peripherally spaced projections extending from the outer surface thereof. The collar provides an opening sized to closely fit the outlet through the majority of its peripheral extent and which provides peripherally spaced enlarged portions adapted to clear the projections on the connector when the bag is installed and removed. The collar also provides an inwardly extending elastomeric diaphragm having a centrally located opening substantially smaller than the outlet of the connector. During installation and removal of the bag on the connector, the enlarged portions of the collar opening are aligned with the projections on the connector and the collar is pressed over the connector until it is positioned behind the projections.

Abstract: A filter cartridge having a tubular, self-supporting, tunable, asymmetric, fluoropolymer alloy filter membrane is provided. Within a sealed cartridge assembly, the tubular filter membrane is connected at opposite ends to inlet and outlet tubes which pass through opposite ends of the cartridge assembly. A guide attached to the end of the inlet tube within the sealed cartridge assembly plugs the end of the inlet tube within the sealed cartridge assembly and provides a filter medium passage from the inside of the inlet tube to the outside of the tubular filter membrane. The outlet tube provides a filter medium passage from the inside of the tubular filter membrane. The input and output tubes are slideably disposed in the ends of the cartridge assembly such that the axial length and therefore the porosity of tubular filter membrane can be adjusted over a range.

Abstract: A disposable dust bag for vacuum cleaners and the like is disclosed which includes a mounting collar adapted to be removably mounted on a vacuum cleaner connector through which dirt-laden air is delivered to the dust bag. The connector has a generally cylindrical outlet end and peripherally spaced projections extending from the outer surface thereof. The collar provides an opening sized to closely fit the outlet through the majority of its peripheral extent and which provides peripherally spaced enlarged portions adapted to clear the projections on the connector when the bag is installed and removed. The collar also provides an inwardly extending elastomeric diaphragm having a centrally located opening substantially smaller than the outlet of the connector. During installation and removal of the bag on the connector, the enlarged portions of the collar opening are aligned with the projections on the connector and the collar is pressed over the connector until it is positioned behind the projections.

Abstract: A hand vacuum cleaner is provided comprising a lightweight motor housing containing a revolving brush. A bag assembly is selectively separable from the housing and is sealable to the housing with an elastomeric retaining ring including a sealing and retaining bead for reception in a recessed slot area of a housing bag attachment collar. A fan is mounted to the motor on a motor shaft locking surface including a wall portion tapering towards the fan. The shaft is in locking cooperation with a mating fan bore locking surface including a wall portion tapered for close reception of the motor shaft locking surface. A shaft extension is threadedly received on the motor shaft and is urged into engagement against the fan by resistance of a revolving brush operated by a belt received on the shaft extension which continually tightens the shaft extension to the motor shaft and fixes the fan to the motor shaft.

Abstract: A vacuum cleaner bag which comprises a bag for receiving and retrieving dirt and debris picked up by a vacuum cleaner. The bag fabric at the open end of the bag is firmly attached to a semi-elastic circular band having a raised male internal rib. The band is adapted to slip over a corresponding circular male flange of the vacuum cleaner. The flange is provided with a female recess corresponding to the raised rib, so that the rib can engage and fit into the recess, preventing the bag from being blown off when the cleaner is in use. An attached tab fastened to the band assists the user in engaging and disengaging the bag from the cleaner.

Abstract: The present invention provides a vacuum cleaner comprising a body housing an electric powered blower, a dust case being connected to and free to be detached from the body, a lid having an intake and being fitted to the dust case, which lid is free to be opened and closed, a bag-shaped filter being freely fitted to and removable from the inner surface of the lid and communicating with the intake, and a dust dumping aperture provided in the dust case and accessible by pivoting away a filter housing unit, the dust dumping aperture being used to remove the bag-shaped filter from the dust case.

Abstract: An air filter bag is disclosed for use in vacuum cleaners. The filter bag includes a plastic collar having an annular rim for retaining the collar on a flanged inlet air duct and for establishing an air seal with the duct. The collar also includes an annular sealing lip spaced radially inward of the rim which engages a peripheral surface of the air duct thereby providing a dual sealing arrangement. In order to facilitate removal of the filter bag from the duct, the collar is provided with a tab portion integrally attached to the rim.

Abstract: A multiple filter bag assembly wherein top access is had for removal and replacement of the filter bags through openings in the cell plate subdividing the filter housing into an upper clean gas plenum chamber and a lower baghouse, wherein use is made of tapered filter bags and a cage for easing the passage of the filter bags through the openings in the cell plate during installation and removal.

Abstract: A split spring steel ring having a channel-shape cross-sectional configuration is sewn into the bottom cuff of a filter bag. The split ring is placed into the opening in the thimble plate of a plenum chamber by lapping the ring at the split and pushing inward until the diameter is reduced for insertion into the opening. The ring is then allowed to expand until the ends abutt at the split. The ring is maintained in its expanded condition in interlocking engagement with the opening by a thimble extension which extends through the ring below the thimble plate of the plenum chamber.

Abstract: A reverse blow-back dust collector utilizes a simplified top removal support arrangement for suspending bag, cage and nozzle assemblies from a tube sheet having plain mounting openings therein. The top removal support includes a collar spot welded to the cage and disposed in force fit engagement with a top fold region of the bag which contains an expansion clamping ring assembly having spaced beads which interlock the bag in sealed relation in its corresponding tube sheet opening. The support also includes a flange which overlies and seats on the upper bead for transmitting cage loads thru the support to the top side of the tube sheet. Ease of assembly and removal affords improved installation and servicing operations.

Abstract: A filter arrangement including a venturi element carried within a tubular filter by a flexible attachment ring at one end of the filter removably securing the filter in the aperture of an apertured plate member in a gas filtration system. The outermost diameter of the venturi element is slightly less than the diameter of the aperture to accommodate withdrawal of the venturi element from either side of the plate attendant to installation and removal of the filter arrangement.

Abstract: A bag filter assembly adapted to permit rapid removal, replacement and repair of the individual filter bags in the assembly. The filter bags are frictionally held in an operational position by a combination of interlocking parts that are securely held by spring biased detents. The spring biased detents of the several parts are designed to permit assembly and disassembly of the bag filter by a series of direct push-pull movements.

Abstract: A bag filter having a self-sealing cuff at the upper open end thereof, a bottom support at the closed end to tension the bag and prevent flapping and a plurality of spaced anticollapse rings each of which encircles an annular outer surface of the bag to which it is attached between the ends of the bag to prevent bag collapse.

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: A filter device of the bag type in which the bags extend from openings through a cell plate and in which the invention is addressed to means for releasably mounting the filter bag to the cell plate with access from the clean side of the filter bags and includes a relatively rigid ring member secured to the open end of the filter bag and a cup member fixed to the cell plate for receiving the ring supporting end portion of the bag in gripping relation therein.

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: An improved tubular filter bag of two piece construction, one piece being coated with a flexible and abrasive resistant coating, the coated piece being in communication with a flow-through inlet for absorbing the impact of the bag during cleaning. Also disposed at approximately the maximum impact point of the filter bag is a support member to restrict flexing of the bag during cleaning.

Abstract: A filter press having a number of filter plates, each of which includes a center hole, with a filter cloth hanging over each filter plate. The filter cloths include a corresponding center hole, and a flexible coupling member having a tubular stem with a flanged base, wherein the flanged base is positioned around the hole on one side of the cloth. The tubular stems are inserted within a coupling cylinder which is positioned within the hole of the filter plate. A method is described for hanging the filter cloths onto the filter plate by inserting one of the stems into one end of the coupling cylinder, and then inserting the cylinder into the hole in the filter plate. A tool is then used to reverse the stem of the coupling member of another filter cloth, and then the same tool is removed permitting the restoration of the stem while positioning it within the other end of the coupling cylinder.

Abstract: An improved arrangement for releasably connecting an end of a tubular gas filter bag to an aperture in an apertured plenum chamber plate member including a mounting member mounted in the aperture in the plate member for releasable engagement with the end of the bag. The mounting member includes an inwardly extending ledge located between an outwardly extending flange which engages the end of the bag and an inwardly extending seat which rests upon the periphery of the aperture. The ledge enables easy mounting of the bag end, which contains an expansible slip ring, over the flange.

Abstract: A filter bag which, when installed, exhibits an improved seal between the thimble and the bag is provided by (1) encasing the ring member in fabric, (2) by incorporating a fabric sleeve concentric with the cuff of the bag or (3) by incorporating two ring members in the bag cuff.