Abstract: A filter apparatus for use with a fluid bed processor includes a movable filter bundle that can be selectively moved within a fluid bed chamber. The movable filter bundle includes one or more filters attached to corresponding filter mounts on a support structure. The movable filter bundle may also include an index rod that rotationally secures the movable filter bundle when in a first position. A support assembly can be used to connect the movable filter bundle to the fluid bed chamber. In the first position air is filtered through the filters in the process operation of the filter apparatus. In a second position individual filters on the movable filter bundle can be easily inspected, serviced, and/or replaced.

Abstract: A mounting collar is for supporting a vacuum cleaner filter bag in a mounted condition over a vacuum cleaner fill tube. The fill tube has a cylindrical outer surface. A panel of the mounting collar is configured to be attached to the filter bag. The panel has a first inner edge defining a first opening for receiving the fill tube. An elastomeric diaphragm of the collar extends across the first opening. The diaphragm has a second inner edge defining a second opening. The second inner edge is configured to be elastically stretched circumferentially about the fill tube and to be in contact with the cylindrical outer surface about the entire circumference of the cylindrical outer surface when the first opening receives the fill tube. A lobe of the diaphragm is defined by the second inner edge and a baseline. The baseline extends from a first point on the second inner edge to a second point on the second inner edge and is located entirely on the diaphragm.

Abstract: An improved bag docking assembly for aligning a vacuum bag for engagement with a dirty air outlet nozzle on a vacuum cleaner, and for retaining the vacuum bag in the position of engagement. The assembly incorporates an anchor member and a mounting member. The anchor member serves to attach the bag docking assembly to the vacuum cleaner. The anchor member can be a substantially flat piece of plastic having a central opening for closely receiving the dirty air outlet nozzle on the vacuum cleaner. The central opening can have a shoulder for engaging a rim or similar protrusion formed about the perimeter of the dirty air outlet nozzle. Additionally, protrusions are located on the anchor member that align with voids in the vacuum bag collar to ensure that correct alignment of the vacuum bag has been achieved.

Abstract: A mounting collar is for supporting a vacuum cleaner filter bag in a mounted condition over a vacuum cleaner fill tube. The fill tube has a cylindrical outer surface. A panel of the mounting collar is configured to be attached to the filter bag. The panel has a first inner edge defining a first opening for receiving the fill tube. An elastomeric diaphragm of the collar extends across the first opening. The diaphragm has a second inner edge defining a second opening. The second inner edge is configured to be elastically stretched circumferentially about the fill tube and to be in contact with the cylindrical outer surface about the entire circumference of the cylindrical outer surface when the first opening receives the fill tube. A lobe of the diaphragm is defined by the second inner edge and a baseline. The baseline extends from a first point on the second inner edge to a second point on the second inner edge and is located entirely on the diaphragm.

Abstract: An apparatus for mounting a vacuum cleaner filter bag on a vacuum cleaner fill tube comprises a filter bag panel. The panel is configured to be grasped by a hand to mount the bag on the fill tube. The panel has an inner edge defining an opening for receiving the fill tube when the bag is mounted on the fill tube. The panel further has an outer edge. A first recessed section of the outer edge is sized and shaped to receive a single finger of the hand when the hand grasps the panel. The first recessed section has a first innermost location. A second recessed section of the outer edge is sized and shaped to receive the thumb of the hand when the hand grasps the panel. The second recessed section has a second innermost location. The innermost locations are spaced apart from each other along an imaginary straight line extending across the opening.

Abstract: An apparatus for mounting a vacuum cleaner filter bag on a vacuum cleaner fill tube includes a filter bag panel. The panel is configured to be grasped by a hand to mount the bag on the fill tube. The panel has an inner edge defining an opening for receiving the fill tube when the bag is mounted on the fill tube. The panel further has an outer edge. A first recessed section of the outer edge is sized and shaped to receive a single finger of the hand when the hand grasps the panel. The first recessed section has a first innermost location. A second recessed section of the outer edge is sized and shaped to receive the thumb of the hand when the hand grasps the panel. The second recessed section has a second innermost location. The innermost locations are spaced apart from each other along an imaginary straight line extending across the opening.

Abstract: A leaf receptacle lid attaches to a hand-held portable lawn blower/vacuum having an inlet for drawing air and leaves into the blower/vacuum and having a hose outlet for discharging the air and leaves. The lid contains a vertical chute and an overhanging horizontal lip. The chute is adapted to hold a flexible leaf receptacle and the overhanging lip is adapted to rest upon a support. The lid also contains a hinged door having an opening connected to the frame. The lid further contains a porous conduit having an inlet adapted to removably connect to the hose outlet of the blower/vacuum and having an outlet that communicates with the opening in the door.

Abstract: A bag for vacuum sealing from which air is sucked up by a suction nozzle which is connected to a suction pipe or a suction horse of a vacuum cleaner. This bag has a small bag for air suction, and the suction nozzle is inserted in this small bag. The small bag is made of two resin films and is opened and closed by a zipper composed of a protrusion and a groove. The suction nozzle has a rear connecting portion with a check valve inside and a front portion with a suction hole, and the rear portion is to be connected to a vacuum cleaner. The rear connecting portion stands upward. The front portion is spatular and has a suction hole which opens downward. The outer circumference of the front portion where the suction hole is provided is almost equal to the inner circumference of the portion of the small bag where the suction nozzle is inserted.

Abstract: A dust bag for vacuum cleaners including a bag shaped member of an air permeable material, adjacent to an inlet opening attachable by an adhering layer to a plate shaped member to facilitate mounting of the dust bag in an intended vacuum cleaner. The adhering layer is protected before use by a removable protective film. The adhering layer includes a number of parts joined with the bag shaped member surrounding an inlet opening, adjacently located and having an increasing distance in relation to each other from the inlet opening, each having an individual protective part of the removable protective film, preferably divided in separate segments by tear off indicates facilitating removal of individual parts of the protective film to adapt the area of resulting adhering layer to utilized plate shaped member, as well as adaption of the inlet opening by tearing off such segments together with underlying bag material.

Abstract: A fitting for a vacuum cleaner is disclosed. The fitting includes a retainer having first and second grooves within which a fitting is adapted to slide. The fitting includes a plate from which a cylinder extends and terminates in a radially inwardly directed deflector. Depending upon the orientation of the fitting within the retainer, the incoming fluid stream is directed in an upward or downward direction to thereby facilitate usage of the fitting with or without a vacuum bag, while at the same time minimizing the potential for splashing and expulsion of liquid drawn into the vacuum cleaner.

Abstract: The improvements apply to a textile bag element which is permeable to air but not to dust, with a mouth in which the fixed portion of the vacuum-cleaner can be coupled by means of an adhesive connection, characterized by the arrangement of an element in the form of a flexible and adaptable flat disk fixed permanently in the mouth of the bag and having a hook-and-loop fastening element on its outer face, a second element also being provided in the form of a flat disk which is of similar shape to the first, is provided with a complementary hook-and-loop fastening element on its opposite face, and can be fitted removably on the disk fixed in the bag, the second element having, on its outer face, an adhesive region to which a protective disk is applied.

Abstract: Contoured exhaust ducts for transmitting a particulate-laden airstream from a conduit into a vacuum cleaner bag of an upright vacuum cleaner are disclosed. In one embodiment, the airstream is turned by a transitional section of the exhaust duct by about 90 degrees. The interior of the exhaust duct is smoothly contoured through such transition for avoiding the generation of excessive noise and turbulence. The contoured surface of the transitional section prevents heavy objects entrained in the airstream from rebounding back in a direction against the airflow. The cross-sectional area of the exhaust duct may be maintained constant despite a change in cross-sectional shape from the inlet to the outlet thereof.

Abstract: A holding plate for the filter bag of a vacuum cleaner has a plug-in opening for attaching a pipe socket of the vacuum cleaner. A seal for sealing the holding plate against the pipe socket of the vacuum cleaner projects into the plug-in opening. In order to lock the holding plate on the pipe socket of the vacuum cleaner, at least one projection pressing the seal against the pipe socket of the vacuum cleaner and projecting into the plug-in opening is provided on the holding plate. In this way, the holding plate is retained on the pipe socket of the vacuum cleaner in a clamped seat.

Abstract: An output duct extension for attachment to an upright vacuum cleaner output sleeve or collar. The output duct extension is constructed to be insertable into the paper fill tube of a disposable paper filler bag. The output duct extension is of a longitudinal length such that when it is inserted into the fill tube and the paper filler bag is contained in a fabric fuller bag of the vacuum cleaner the upper end of the output duct extension is positioned at the approximate top end of the fill tube.

Abstract: An improved vacuum cleaner bag with a mechanism for allowing the user to visually align the coupling opening of the vacuum cleaner bag with the discharge tube of a vacuum cleaner. The vacuum cleaner bag also includes a discharge tube receiving structure positioned opposite the coupling opening for receiving the tube end of the discharge tube when the collar surrounding the coupling opening is being positively seated around a base end of the discharge tube.

Abstract: An apparatus and method for transporting a flow of air and particulates through a vacuum cleaner. The apparatus can include a manifold with two inlet ports that collect two separate streams of the flow, combine the streams, and direct the combined flow toward a filter element through a single outlet port. The flow can expand within the manifold between the inlet ports and the outlet ports to decelerate the flow. The manifold can also include a storage receptacle for storing a belt used to drive a roller brush of the vacuum cleaner.

Abstract: A device for connecting a dust bag, the device having a mounting flange (1) and a ring (21) capable of being fixed, matching, one to a vacuum cleaner frame or to a removable vacuum cleaner support or to a linerboard, and the other to the dust bag via one of their two faces, the flange (1) and ring (21) being provided with additional matching elements for being mutually maintained by their free face, and with at least a visual mark (4,24) to facilitate their connection. The invention is characterized in that the diameter of the device is twice as much as the length of the assembled device, when the ring (21) and the flange (1) are arranged one on the other. Advantageously, the flange (1) and the ring (32) have a non-planar surface at their free face, resulting from the difference in height of the two parts, for guiding one of the parts onto the other when they are being connected.

Abstract: A fitting for a vacuum cleaner is disclosed. The fitting includes a retainer having first and second grooves within which a fitting is adapted to slide. The fitting includes a plate from which a cylinder extends and terminates in a radially inwardly directed deflector. Depending upon the orientation of the fitting within the retainer, the incoming fluid stream is directed in an upward or downward direction to thereby facilitate usage of the fitting with or without a vacuum bag, while at the same time minimizing the potential for splashing and expulsion of liquid drawn into the vacuum cleaner.

Abstract: A vacuum cleaner filter bag retainer includes slots on each side which receive a cardboard plate attached to a filter bag. The plate is slid into the slots of the filter bag retainer such that openings in the plate and bag match with an opening in the filter bag retainer. The retainer is attached to a tank through an opening in the tank, and an inlet fitting extends from outside the tank, through the retainer, and into the bag. The inlet fitting, therefore, prevents the bag from sliding out of the slots in the retainer. A swivel fitting loosely traps the inlet fitting adjacent the filter bag retainer through threads on the swivel fitting and the retainer. The inlet fitting also holds a hose to the inlet fitting.

Abstract: A dust container for vacuum cleaners includes a bag and a front plate. The bag is made of a material that, essentially, is permeable only to air. The front plate encloses a suction opening in the bag. The front plate is of a shape that is independent of the vacuum cleaner model in which the dust container is to be used. A mechanism for attaching a mounting plate to the front plate is also provided for the purpose of fitting the dust container in the vacuum cleaner. The mechanism for attaching the mounting plate to the front plate is designed specifically for the vacuum cleaner in which the dust container is to be used.

Abstract: A vacuum cleaner filter bag exposes bacteria in incoming dirty air to bactericide throughout the useful life of the bag. Fingers provided on the interior walls of the bag are impregnated with bactericide. Air flow in the bag during vacuum cleaner operation causes the fingers to stand out from the wall, intercepting particles in the dirty airstream and exposing bacteria on those particles to the bactericide. The fingers stand out from the wall, and thus kill bacteria, substantially throughout the useful life of the bag, even after a cake of dust and dirt has formed on the inner walls of the bag.

Abstract: For use with vacuum cleaner bags of the type having a substantially rigid collar surrounding the bag opening, and with vacuum cleaners of the type having a dirty air outlet nozzle, a vacuum bag docking assembly is shown and described. The assembly incorporates an anchor member having a central opening for closely receiving the dirty air outlet nozzle. The assembly also incorporates a mounting member which engages the collar on the vacuum bag to secure the bag to the bag mounting member. The bag mounting member is pivotally connected to the anchor member, and moves between a loading position in which the bag can be inserted or removed from the mounting member, and a working position in which the bag opening engages the dirty air outlet nozzle.

Abstract: A vacuum cleaner erroneous closing apparatus is provided to prevent a dust cover from being closed when a dust collector is not mounted, thereby refraining a motor from being damaged by the dust collected when a vacuum cleaner is operated without the dust collector, the apparatus comprising an erroneous closing prevention unit hinged at a designated position at the low main body for enabling the dust cover to be closed when the dust collector board is inserted onto dust collector fitting part of the low main body and for stopping the closure of the dust cover when the dust collector is not mounted, and a compression spring fixed at designated positions of the low main body and of the erroneous closing prevention unit to apply turning effect toward a direction which prohibits the dust cover from being closed.

Abstract: A pool cleaner operating with a pool cleaning system which is not equipped with a booster pump. The apparatus may comprise a frame having a forward end and a rearward end with a water inlet mounted on the frame and receiving a supply of water having a volume per unit time. The inlet may comprise a supply mast having a number of openings for supplying water to the various components of the cleaner. The frame is carried on a plurality of transport wheels mounted on the frame. The apparatus further includes a vacuum system including a collection bag positioned on a suction mast having water injection ports positioned such that at least one opening in the water injection port injects water into the collection bag to create suction and draw debris into the bag. A drive system is provided to move the apparatus around the pool. The drive system includes a turbine having a plurality of vanes rotating and mounted in a turbine housing.

Abstract: The invention pertains to a filter bag (8) for a vacuum cleaner (1), with a retainer plate (16) made of a cardboard-paper material that can be attached to a dust bag (37), for example by gluing, and that has a sealable opening (19) for a suction tube (vacuum connector (18)) of a vacuum cleaner (1), where the opening (19) can be closed off with a separate closure piece (V) which can be moved from an open position to a closure position, being slid between two tiers (38, 40). For greater ease of handling the invention proposes that the closure piece (V) be practically fully enclosed in an outer contour of the retainer plate (16) in the open position and in the closure position and that the closure piece (V) lie exposed in a recess (57) of the uppermost tier (38) separate from the opening (19), the longitudinal extension of the recess (57) conforming to the closure piece (V).

Abstract: An obturation device for the disposable bag (1) of a vacuum cleaner, the bag (1) having a rigid area (1a) in the vicinity of a closable filling inlet, in order to fix the bag (1) to a frame part (13) of the vacuum cleaner, as well as a flap (5) for closing the bag (1) , the flap being displaceable by rotation between an open position and a closed position of the filling inlet in the extension plane of the rigid area (1a). The closing flap (5) is mounted in the rigid area (1a) which is provided with a profiled perforation (4a) whose shape and contour form a guiding structure (4) within which the closing flap (5) can move. Application to disposable bags for vacuum cleaners.

Abstract: Disclosed is a dust collector that is essentially modular in structure, thereby making it easy to transport, position and assemble by the user himself or herself. This dust collector includes one or more filter modules, a fan module operatively connectable to one end of the filter module(s), an end plate for closing the opposite end of the filter module(s), and optionally a silencer module intercalatable between the fan module and the filter module(s) to reduce the noise of the fan. In use, the dust collector can be easily upgraded whenever required by merely changing the motor, fan wheel and inlet of the fan module and/or adding one or more filter module in order to increase the filtering surface area.

Abstract: A disposable vacuum cleaner dust bag includes a porous sheet defining a dust collection chamber having an inlet, and a substantially rigid collar secured to the sheet around said inlet. The collar provides a generally circular opening and has at least a pair of peripherally spaced radially pivotable further portions disposed about the opening and extending radially inwardly further than the remainder of the collar when the pivotable portions and the collar remainder are in the same plane. An elastic diaphragm on the collar provides a generally circular opening smaller than the opening in the collar. The collar is adapted to mount on a connector having a generally cylindrical outlet having an end through which the air is delivered by a vacuum cleaner and which provides peripherally spaced outwardly extending projections. The collar is adapted to be installed, maintained in an installed position, and removed with the pivotable portions aligned with the projections.

Abstract: Portable vacuum and air filtration units including a plurality of separately transportable modules are disclosed. Some units include a mechanism for locking the modules together during use, an air inlet located in one of the modules, a debris screen and a mechanism for receiving debris stopped by the screen located in one of the modules, an electrostatic filter located in one of the modules, a bag filter assembly located in one of the modules, a HEPA filter assembly located in one of the modules, and a mechanism for drawing a substantial volume of air through the inlet, screen, electrostatic filter, bag filter assembly and HEPA filter assembly. Other units include a pliable, tubular mesh for filtering debris.

Abstract: An effluent metering system includes an adapter connectable between the air outlet port on a vacuum cleaning appliance and a supplemental effluent metering device. The adapter preferably has a tubular shell which defines an inlet for receiving a flow of air discharged from the air outlet port. The adapter also has a pair of outlets. A first fluid passage in the shell connects the inlet with a first one of the outlets for exhausting air into a filter. A second fluid passage in the shell connects the inlet with a second one of the outlets for exhausting air into the supplemental metering device.

Abstract: Filter unit assembly located at an operator-designated position is provided for enabling fluid flow through a removable mesh filter and ready disconnectibility from a vacuum line with the avoidance of liquid spillage from the filter unit assembly. The filter unit has a chamber which is open at one end and closed at its other end except for an outlet conduit displaced from the longitudinal axis of the chamber, first and second outwardly extending grip means which are displaced from each other about the longitudinal axis of the chamber, first and second supports for permitting the unit to rest in different stable positions, and a cap member for which engages and closes the front end of the chamber and has an axial inlet.

Abstract: A bag securing and tensioning system for a vacuum cleaner includes a duct for directing a flow of dirt-laden air from an inlet thereof to an outlet thereof, a porous outer bag and a connection member for releasably mounting the outer bag to the outlet end of the duct. The connection member includes a longitudinally extending slot located in a handle of the vacuum cleaner and a bag guide member including an extension slidably mounted in the slot. A bag clip is secured to the bag guide member. The bag clip holds an end of the porous outer bag.

Abstract: A pressure filter includes a filter tank into which a rigid outlet conduit extends, and a plurality of clusters of filter tubes are suspended in the pressure chamber within the tank from a multi-tube manifold which is connected to and hangs from the outlet conduit. In the disclosed embodiment a purality of outlet conduits and associated manifolds and filter tubes are disposed within a single filter tank.

Abstract: A novel vacuum cleaner bag is disclosed comprising a closed receptacle having an inlet orifice, the bag being formed from a sheet containing at least 65% flashspun polyolefin fibers. The vacuum cleaner bag is suitable for conventional vacuum cleaners and provides efficient removal of particulate matter, especially soil particles less than 10 microns in size.

Abstract: A bag mount assembly for a vacuum cleaner includes a vacuum cleaner housing including an air inlet and a mounting plate which is pivotably mounted to the housing in relation to the air inlet. The mounting plate includes a planar body and a channel extending from one edge of the body. The channel is adapted to selectively hold a reinforced collar of an associated vacuum cleaner bag. In this way, the vacuum cleaner bag can be selectively connected to the air inlet or be rotated away therefrom in order to facilitate the changing of the bag.

Abstract: A permanent mounting assembly for a vacuum cleaner filter bag includes a plastic collar stitched to the porous body of the vacuum cleaner bag around the inlet opening thereof. The bag is mounted on the exterior surface of a projection on the vacuum cleaner housing. The exterior surface of the projection is provided with an annular groove. An interior rib on the collar is positioned within the groove to mechanically lock the bag on the projection of the housing. A nonelastic tie strap is positioned around the rib to permanently secure the rib in place and to provide a permanent fluidtight connection between the collar and the projection on the housing. The collar is provided with a band which is folded back to conceal the stitching, providing an attractive, neat appearance.

Abstract: A dust control apparatus having a cover member lowerable into an opening of a container, the cover member having a radially expandable seal for sealing the opening, the cover member having a passage therethrough adapted to receive a conduit, the cover member being operable in telescoping relation to the conduit and the passage being sufficiently larger than the conduit for the passage of air between the cover member and conduit, the cover member being movable laterally relative to the conduit to enable the cover member to be lowered into a container which is not precisely aligned therewith, a filter sleeve having a lower end attached to the cover member and an upper end attached to the conduit, the filter sleeve being adapted to prevent the escape of dust from the space between the cover member and conduit, the filter sleeve being protected by the conduit from damage caused by materials flowing through the conduit, the apparatus including an optional fume collecting annulus locatable in surrounding relation t

Abstract: Air leakage passageways formed by an elongated sealing finger deflected through a sealable collar of a vacuum cleaner bag are substantially eliminated by the use of straddling tabs or an additonal elastic membrane across the collar opening which assure a total seal between the collar opening and the vacuum cleaner inlet fitting when the latter extends through the opening.

Abstract: The invention relates to a vacuum cleaner having a removable or pivoting cover on the housing of the vacuum cleaner to hold a filter bag. In the cover, there is a sliding, adjustable guide element which holds a filter bag reinforcement plate having a filler opening. When the guide element is adjusted by an activating element, the reinforcement plate is locked with the cover by appropriate elements, and is engaged with its filler opening over a corresponding filler tube on the housing, so that the cover can be locked in the housing by the reinforcement plate.

Abstract: A carrying case with upper and lower case sections connected by means of hinges opens to a point where the upper case section is held upright including a conopy projects upward and outward from the two case sections of the case when opened wherein an opening in the front of the canopy permits access to the chamber created within the canopy and the case sections including fixtures suited to handling and repairing mechanical components are attached to the interior surfaces of the case and an exhaust fan in mounted in series with a filter chamber to draw ambient air through the front opening, to continuously evacuate the contents of the chamber, and to exhaust the filtered air through the upper case section and further including a vacuum device in series with a filter is equipped with a hose for cleaning objects inside or outside the chamber and for exhausting the air through an opening in the upper case section.

Abstract: The invention relates to an electric vacuum cleaner and the corresponding filter bag (7) which can be removed from a chamber (6) after opening and separating a socket connection. In order to achieve easier, cleaner handling upon changing the filter bag, the chamber (6) is separable by disengagement in a region of the shaft, about which the chamber can pivot, (14) after swinging separation from the filter bag (7).

Abstract: In a suction cleaner comprising a housing (10) with a disposable filter bag (13) a movable tube piece (17) is provided which is adapted to enter the inlet opening (14a) of the filter bag. According to the invention, the tube piece (17) is provided with a control means actuatable by a pressure difference, preferably the difference between atmospheric pressure and the underpressure in the suction cleaner housing.

Abstract: The present invention relates to an arrangement of filter bags in electric vacuum cleaners in which the filter bag has a bottom plate which has an insertion opening for a fan-side air-blast socket and at least one side-edge indentation (28) and is arranged as a transverse wall in a filter-bag chamber (6) which is adjacent a motor-fan housing (5) and can be lifted off from it. A second side-edge indentation is disposed opposite first side-edge identation and housing-side profections extend into both indentations and protrude beyond the lower side of the bottom plate.

Abstract: A mounting collar for a vacuum cleaner bag comprising three or more panels defined from a unitary blank and adhesively bonded in overlying relation to each other. The panels incorporate central aligned openings therethrough which, either in and of themselves or with an adhesively secured elastomeric sheet, provide for a sealing to the exhaust tube of a vacuum cleaner. The blank and the individual panels formed therefrom are from a low caliper stock paperboard material within the range of 15-30 points (0.015 inch to 0.030 inch). The intermediate panel or panels of the overlying panels are peripherally smaller than the outer panels and have the openings therein peripherally larger than the aligned openings in the outer panel.

Abstract: A vacuum cleaner comprising a fan assembly which via a chamber encloses a dust container and communicates with an inlet sleeve for dust laden air. The inlet sleeve is via a hose connected to the nozzle of the vacuum cleaner. The walls of the chamber are provided with guides for a stiff collar which is part of the dust container. The guides extend mainly perpendicular to the axial direction of the inlet sleeve. The vacuum cleaner also includes a flexible inflatable means which is placed about the inlet sleeve. When starting the fan the flexible means is inflated by means of the pressure difference between atmosphere and the chamber thereby preventing dust laden air from flowing outside the dust container.

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: In a vacuum cleaner having a disposable dust bag of the kind comprising an attachment plate of cardboard or the like, and a cover adapted to be opened for the replacement of the dust bag, a blocking device is provided which is adapted to prevent closing of the cover when the dust bag is missing. The blocking device includes a slide actuated by a spring to be moved to a first position in which the closing of the cover is prevented, and a toggle-joint mechanism adapted to be actuated by the attachment plate to move the slide to a second position for permitting closing of the cover.

Abstract: The invention is directed to a safety filter for an outlying filter cartridge of a hand-guided vacuum cleaner. The filter cartridge includes a rigid air-permeable jacket and accommodates a paper filter bag which is seated in the jacket. The safety filter is a bag corresponding to the form of the jacket and is made of electrostatically-charged non-woven fabric. The safety filter is mounted between the jacket and the paper filter bag.

Abstract: A filtering apparatus for separating particulates from a hot gas stream using hollow, tubular filter elements has a housing with a laterally extending support plate for the filter elements separating the housing into upper and lower sections. The tops of the filter elements are biased against the support plate and the bottoms thereof restrained from lateral movement by restraining rings. Blowback and purge gas systems provide for cleaning of the filter elements and maintenance of the blowback system clear of the solids or condensation products that might form during the separation. The apparatus is especially useful in filtering solids from a hot, corrosive gaseous stream, such as a zirconium tetrachloride process gas stream, where the gas stream contains gaseous constituents that are subject to condensation or solids formation during separation of the particulates and prior to discharge from the filtering apparatus.

Abstract: A latch device for a filter bag supporting tray comprising a plurality of latch bolts operatively interrelated to move together so that blockage of any latch bolt will result in prevention of any other bolt from entering its latch recess, and only secure fully latched constraint of the tray is possible.