Abstract: A cylinder vacuum cleaner comprising a main body which is fluidly connected to a suction hose used to pull the main body forwards along a floor, and a front swivel castor for supporting the main body on the floor, the front castor comprising a frame mounted for rotation about a swivel axis and one or more wheels mounted on the frame, the hose being connected to the frame for co-rotation with the frame about the swivel axis, wherein the swivel axis is positively raked.

Abstract: A vacuum cleaner operable to separate debris from an air stream. The vacuum cleaner includes a first cyclonic separator and a second cyclonic separator having an inlet configured to receive the air stream from the first cyclonic separator. The inlet of the second cyclonic separator directs the air steam in an inlet flow direction from an upper end of the first housing toward a lower end of the first housing and along a longitudinal axis into the second cyclonic separator. The inlet of the second cyclonic separator has an inlet cross-sectional area for flow of the air stream measured normal to the longitudinal axis that decreases in the inlet flow direction.

Abstract: A vacuum cleaner has a cleaning powder distribution system and an actuator connected to the powder distribution system for selectively dispensing powder from the powder distribution system to soiled spots on a floor surface. In addition, a cleaning fluid distribution system is adapted to selectively distribute a liquid cleaning solution to the soiled spot. A propellant, in the form of an aerosol or compressed gas can be used to distribute the cleaning powder to the floor. A method of cleaning a spot on a surface comprises applying a selected volume of fluid cleaning solution to a selected area on the surface to be cleaned, applying a selected amount of cleaning powder to the selected area and extracting the applied cleaning solution and cleaning powder from the selected area on the surface to be cleaned.

Abstract: A vacuum cleaner comprises an improved dirt separator and collection module, which includes an exhaust grill comprising a plurality of vanes defining inlet passages for guiding working air through the module. At least one of the vanes can define an air exhaust conduit for exhausting working air from the module through the exhaust grill.

Abstract: An autonomous vacuum cleaner comprising a chassis, a traction part for supporting the vacuum cleaner on a surface, a driving part for driving the traction part and a control system configured to control the driving part to guide the vacuum cleaner across a surface to be cleaned. The vacuum cleaner further includes a cleaner head having a dirty air inlet facing the surface to be cleaned and a separating apparatus carried by the chassis and communicating with the cleaner head in order to separate debris from an airflow entering the separating apparatus via the dirty air inlet. The separating apparatus comprises a first upstream cyclone and a plurality of second cyclones arranged in parallel with one another and located downstream of the first cyclone.

Abstract: A robot cleaner having a configuration capable of improving an ability to collect dust, etc. is disclosed. The robot cleaner includes a suction hole to suction dust, a dust collector to receive the dust suctioned through the suction hole, and a rotating brush provided at a side of the suction hole. The robot cleaner is configured to sweep up and collect the dust into the dust collector by a drive force of the rotating brush.

Abstract: A suction cleaner comprising a source of suction, for creating a suction airflow and a separator upstream of the source of suction, for separating and retaining entrained matter from the suction airflow, wherein the separator is adapted for separation of wet material from the suction airflow, the cleaner has a reservoir for liquid and there is a liquid delivery device for delivering the liquid into the suction airflow which enters the separator.

Abstract: A cyclone separator for a suction cleaning appliance is provided, including a separating container for separating cleaning liquid drawn in by suction, with an inlet through which suction air and cleaning liquid can be drawn by suction into an interior of the separating container, thereby forming a cyclone, a suction extraction line extending into the interior and connectable to a suction unit, with an outlet through which suction air can be drawn out of the interior, and a partition wall shielding the outlet from cleaning liquid, a space being provided between an inner wall of the separating container and the partition wall. The cyclone separator can include at least one transfer element arranged between the partition wall and the inner wall for transferring cleaning liquid from the partition wall to the inner wall, the transfer element bridging the space except for a maximum remaining space of 2 millimeters.

Abstract: A vacuum cleaner has a removable cyclonic separator that includes a cyclone chamber; a dirt-collection chamber, open at one end; and an outlet duct from the cyclone chamber. An open end of the outlet duct is arranged for connection to a motor intake duct on the cleaner, the outlet duct and dirt collection chamber sharing a common wall section which divides the open end of the outlet duct from the open end of the dirt collection chamber. A cover closes off the open end of the dirt collection chamber and can be opened to allow access to the dirt collection chamber for emptying. When the cover is in the closed position, a cover sealing member forms an air seal between the cover and the common wall section. When the outlet duct is connected to the motor inlet duct, an outlet duct sealing member forms an air seal between the ducts.

Abstract: In a vacuum cleaner (1) particulate matter (32) accumulates on a counter-weighted flap (4). When the weight of the particulate matter (32) exceeds the effect of the counterweight (15) and the effect of any air-pressure differential across the flap (4), the flap opens and voids particulate matter (32) from within the vacuum cleaner (1).

Abstract: A sealing member for reducing or preventing loss of air from a multi-cyclone dust separating apparatus in a vacuum cleaner is provided. A sealing member comprises an inner sealing portion for maintaining sealing between a first cyclone unit and second cyclone units, an outer sealing portion for reducing or preventing the inflow of air to the cyclone dust separating apparatus from its exterior, and a cyclone receiving portion connected to the inner and outer sealing portions by a connecting member. The cyclone receiving portion includes holes in which at least portions of the second cyclone units are respectively received.

Abstract: In a platform-carried carpet-cleaning machine for facilitating transport of the machine, the platform including a machine-supporting base having upper surface extending between an open entry-end and a closed back-end, the upper surface having an entry portion sloping at no more than about 5° with respect to horizontal such that the machine can be driven on and off the platform with application of about the same amount of user force as during carpet-cleaning operations. Inner surfaces of first and second platform sidewalls both include protrusions frictionally engaging the machine side panels and configured to sandwich the machine therebetween to prevent lateral movement of the machine on the platform. A pair of wheels is mounted with respect to the base for rolling the machine on the platform across a floor, each wheel being secured to its corresponding sidewall by an axle which extends therethrough and is molded in place through the sidewalls to facilitate assembly of the platform.

Abstract: A vacuum cleaner with a cyclone module assembly comprises a cyclone separation chamber for separating dust and debris from air and a collection chamber for collecting dust and debris that is separated from the air in the cyclone separation chamber. The cyclone module assembly further includes at least one feature for directing contaminants downwardly, such as a helical step dividing the separation chamber from the collection chamber or a circumferential fin that extends from the inside wall of the collection chamber or.

Abstract: A hand-holdable vacuum cleaner comprising: a motor coupled to a fan for generating air flow; a battery pack housing at least one rechargeable cell for powering the motor; a body with a handle; a dirty air duct with a dirty air inlet; and a dirt separating means located in a path of the air flow generated by the fan, wherein the dirt separating means comprises: a hollow substantially cylindrical dirt container with a longitudinal central axis arranged transverse the body; and an air inlet port to the dirt container, wherein the air inlet port is in communication with the dirty air duct, wherein the dirt container is rotatingly connected to the body to pivot, with the battery pack, about the central axis between a folded position and an extended position diametrically opposed to the folded position.

Abstract: A dust collecting apparatus for a vacuum cleaner is provided. The dust collecting apparatus includes a centrifugal separating portion, a dust receptacle to collect dust which is separated by the centrifugal separating portion and a filter portion having a filter unit separating dust from an air current discharged from the centrifugal separating portion. The filtering portion further includes a dust removing unit to detach the filter dust caught in the filter unit, and a dust discharge member to move the filter dust to an upstream of the centrifugal separating portion.

Abstract: A surface cleaning apparatus comprises a filtration apparatus comprising at least one cyclone and at least one filter mounted in a filter housing. The filter housing has a lower portion, such as a bottom door, that is openable and the filter is visible, and a dirt collection area upstream of the filter is emptyable, when the lower portion is opened.

Abstract: A cylinder vacuum cleaner comprising a main body which is fluidly connected to a suction hose used to pull the main body forwards along a floor, and a rear swivel castor for supporting the main body on the floor, the rear castor having a negatively-raked swivel axis which is offset from a wheel axis of the castor to provide a positive castor trail.

Abstract: An autonomous vacuum cleaner comprising a main body comprising a dirty air inlet, a clean air outlet, an airflow path extending between the dirty air inlet and the clean air outlet, a separating apparatus arranged in the airflow path between the dirty air inlet and the clean air outlet, and an airflow generator for generating an airflow along the airflow path from the dirty air inlet to the clean air outlet. The airflow generator has a discharge portion which discharges airflow into a chamber formed in the main body, the chamber including an opening that is closable by a removable panel, wherein a power source is receivable within the chamber formed in the main body and is removable from the chamber through the opening.

Abstract: An autonomous vacuum cleaner comprising a main body having a dirty air inlet, a clean air outlet, an airflow path between the dirty air inlet and the clean air outlet and a primary separating apparatus arranged in the air flow path between the dirty air inlet and the clean air outlet. The primary separating apparatus comprises at least one cyclone, and the main body further includes a secondary separating apparatus in the airflow path downstream of the primary separating apparatus. The secondary separating apparatus comprises a container for holding dirt and debris which has an air inlet and a filter element, wherein the container is arranged in the air flow such that air flows into the container through the air inlet and out of the container through the filter element. The secondary separating apparatus is removable.

Abstract: A surface cleaning apparatus comprises an air flow passage extending from a dirty air inlet to a clean air outlet. A suction motor is positioned in the air flow path. At least one cyclone is positioned in the air flow passage. An associated dirt collection chamber is exterior to the cyclone. The cyclone and the suction motor are positioned side by side and have generally parallel longitudinal axes. The dirt collection chamber may surround part of the suction motor. Alternately, or in addition, a pre-motor filter having an enhanced surface area may be provided by configuring the pre-motor filter to extend outwardly of the pre-motor filter, such as by overlie part of the cyclone or the dirt collection chamber.

Abstract: A cyclone separation device (102, 202) and a cyclone vacuum cleaner (100, 200) mounted with the device. A first cyclone separation unit in the cyclone separation device (102, 202) comprises a dust bucket (10) and a mesh filter (7) with air holes (7a). Airflow enters the first cyclone separation unit to undergo first gas-solid separation. The airflow after the separation enters a second cyclone separation unit through the air holes (7a) of the mesh filter (7). A filter in the second cyclone separation unit comprises a plurality of cyclone barrels (31). An upper end and a lower end of the cyclone barrel (31) are open. A first air inlet (31a) and a second air inlet (31b) are disposed on a side wall of the cyclone barrel (31). The airflow (41a, 41b) after the gas-solid separation enters the first air inlet (31a) and the second air inlet (31b) through a first airflow passage and a second airflow passage respectively, is mixed in the cyclone barrel (31), and then undergoes second gas-solid separation.

Abstract: A cleaning appliance of the canister type includes a substantially spherical floor engaging rolling assembly comprising a fluid inlet for receiving a fluid flow and a device for acting on the fluid flow received through the inlet, and a steering mechanism for steering the cleaning appliance.

Abstract: The present invention relates to a separating apparatus for separating particles from a fluid flow. Particularly, but not exclusively, the invention relates to a vacuum cleaner having such a separating apparatus for removing dust particles from a dust laden airstream. The separating apparatus includes a first cyclonic cleaning stage including at least one cyclone, and an electrostatic filter located downstream of and in fluid communication with the at least one cyclone, wherein at least a portion of the electrostatic filter is located longitudinally through the separating apparatus, at least a portion of the first cyclonic cleaning stage being arranged around the electrostatic filter.

Abstract: An air flow sensing unit, which may sense an amount of air flowing or an pressure for air flown into the cleaning apparatus by a suction motor or an impeller and inform a user of a time for emptying a dirt collecting receptacle of dust or dirt and/or a time for cleaning or replacing a filter with a new one, and a cleaning apparatus having the same are provided. The unit may include an air flow pipe to fluidly communicate an air flow passage of a cleaning apparatus with the outside, and an indicator positioned in the air flow pipe to be lifted based on a change in amount of air flowing or air pressure generated by air movement in the air flow passage and to be lowered due to a weight thereof.

Abstract: Several embodiments of an upright surface cleaning apparatus are disclosed. The surface cleaning apparatus has a first cyclonic cleaning stage and comprises a surface cleaning head having a dirty fluid inlet. A fluid flow path extends from the dirty fluid inlet to a clean air outlet of the upright surface cleaning apparatus. A support member is mounted to the surface cleaning head. A mounting member mounted to the support member. At least one of a first cleaning stage of the upright surface cleaning apparatus and a suction motor is mounted directly or indirectly to the mounting member. A suction motor is provided in the fluid flow path.

Abstract: A multi-cyclone dust separator according to an embodiment of the present invention comprises at least three dust separation units for separating dust stepwise from relatively larger size. The dust separation units comprise a first dust separation unit primarily separating dust from external air drawn in; a second dust separation unit secondarily separating dust from the air primarily dust-separated by the first dust separation unit; and a third dust separation unit thirdly separating dust from the air secondarily dust-separated by the second dust separation unit. Here, the first to third dust separation units are multi-layered in a serial manner.

Abstract: A surface cleaning apparatus comprises an air flow path extending from a dirty air inlet to a clean air outlet. The surface cleaning apparatus may comprise a cyclone bin assembly comprising a cyclone chamber positioned in the air flow path. The surface cleaning apparatus may comprise a dirt collection chamber and a suction motor positioned in the air flow path. The cyclone chamber may have first and second opposed ends and a sidewall extending between the first and second opposed ends. The sidewall may have a first portion extending from the first opposed end towards the second opposed end and a second portion extending from the second opposed end towards the first opposed end. The first and second portions may meet at a juncture. The first opposed end and the first portion may be openable.

Abstract: The present invention relates to a visualization device for dust collection of a vacuum cleaner, the visualization device includes a collecting unit mounted on one side of a pathway on which the suction force of a vacuum cleaner for sucking dust is transmitted, and moves at least some of the sucked dust in one direction, a dust collecting unit of transparent material coupled with the collecting unit and exposes a state of dust received by the collecting unit to the outside, a discharge unit which guides air and dust, which has passed through the dust collecting unit, to be discharged into the pathway that transmits the suction force of the vacuum cleaner, a foreign material separation unit provided in the dust collecting unit to generate cyclonic flow, and a foreign material discharge unit inserted into the inside of the foreign material separation unit by the manipulation of a user from one side of the dust collecting unit and allows the inflow of air from the outside into the inside thereof to discharge dus

Abstract: A vacuum cleaner and vacuum cleaner system comprises a dirt separating and collecting system. The dirt separating and collecting system can include a filter module having a filter bag, wherein the inlet to the filter bag is helical and dirt entering the filter bag is visible to the user. Optionally, the filter bag filter module can be interchanged with a bagless filter module, which may include a conventional cyclone separator.

Abstract: A surface cleaning apparatus may comprise an air flow path extending from a dirty air inlet to a clean air outlet and a suction motor. The surface cleaning apparatus may comprise a cyclone chamber provided in the air flow path. The cyclone chamber may comprise a cyclone chamber first end and a cyclone chamber second opposed end, a cyclone air inlet, a cyclone air outlet provided at the cyclone chamber second opposed end and a cyclone chamber wall. An air exit conduit may be exterior to the cyclone chamber and may extend from the cyclone air outlet. At least one reinforcing rib may be positioned in abutting relationship with the air exit conduit and the cyclone chamber second opposed end.

Abstract: A surface cleaning apparatus comprises an air flow path extending from a dirty air inlet to a clean air outlet, an air treatment member and a suction motor. The surface cleaning apparatus comprises a main body comprising a front end and a rear end, first and second opposed sidewalls and a suction motor housing. At least one of the first and second opposed sidewalls may have a suction motor access opening.

Abstract: A surface cleaning apparatus comprises an air flow passage extending from a dirty air inlet to a clean air outlet and a suction motor. The surface cleaning apparatus may also comprise a cyclone chamber provided in the air flow passage. The cyclone chamber may comprise a cyclone air inlet, a cyclone air outlet and a dirt outlet. The surface cleaning apparatus may comprise a dirt collection chamber having a dirt inlet, a dirt collection chamber first end, an opposed dirt collection chamber second end and a longitudinally extending sidewall. Various design improvements are provided.

Abstract: A vacuum cleaner includes a cleaner body having a suction source for generating a suction force; a suction nozzle assembly to draw in a dust or dirt from a surface to be cleaned by using the suction force of the suction source; a cyclone unit to separate the dust or dirt drawn in through the suction nozzle assembly from an air; a dust bin detachably disposed to the cleaner body to collect the dust or dirt separated at the cyclone unit; and a shredder to shred a paper, the shredder being detachably communicated with an opening of the dust bin to collect the shredded paper into the dust bin.

Abstract: A cleaning appliance of the canister type includes a floor engaging rolling assembly including a fluid inlet for receiving a fluid flow and a device for acting on the fluid flow received through the inlet, and a steering mechanism including a chassis connected to and projecting from the rolling assembly, a plurality of floor engaging steering members connected to the chassis and a control mechanism for changing simultaneously the orientation of the steering members relative to the chassis.

Abstract: A surface cleaning apparatus comprises at least one cyclone and at least one dirt collection chamber. The dirt collection chamber has a removeably mounted door.

Abstract: A vacuum cleaner is provided that includes a cleaner body; a dust separating apparatus fixed to the cleaner body; a first dust receptacle detachably attached to the cleaner body on a bottom portion of the dust separating apparatus to collect large particle dust; a second dust receptacle detachably attached to the cleaner body on a bottom portion of the first dust receptacle to collect fine particle dust; and a locking device having a first position in which the dust separating apparatus is closely contacted to the first and second dust receptacles, and a second position in which the dust separating apparatus is spaced apart from the first and second dust receptacles at a predetermined interval. The second dust receptacle is detached from the first dust receptacle at the second position, and is detached from the cleaner body after the first dust receptacle is disengaged from the cleaner body.

Abstract: A vacuum cleaner with a cyclone module assembly comprises a cyclone separation chamber for separating dust and debris from air and a collection chamber for collecting dust and debris that is separated from the air in the cyclone separation chamber. The cyclone module assembly further includes at least one feature for directing contaminants downwardly, such as a circumferential fin that extends from the inside wall of the collection chamber or a helical step dividing the separation chamber from the collection chamber.

Abstract: A surface cleaning apparatus comprises cyclone downstream from the dirty air inlet and an openable pre-motor filter chamber. The pre-motor filter chamber is openable with the cyclone chamber and/or the dirt collection chamber associated with the cyclone chamber.

Abstract: A cyclone bin assembly comprises a dirt collection chamber in communication with a dirt outlet of a cyclone chamber. The dirt collection chamber comprises a first and second opposed ends and comprises a first and portions. The dirt outlet is positioned adjacent the second opposed end of the dirt collection chamber. The first and second portions may comprise discrete chambers that are separated from each other by a passage extending between the dirt outlet and a wall of the dirt collection chamber. The first and second portions may have first and second sides. The first side is positioned adjacent the passage and the second side is angularly spaced from the passage. The second portion has a divider wall that extends towards the second opposed end of the dirt collection chamber from the first opposed end of the dirt collection chamber. The divider wall may be spaced from the second side.

Abstract: A vacuum cleaner is disclosed. The present invention relates to a vacuum cleaner that is able to form dust and foreign substances collected in a dust collection device provided therein in a single mass shape to discharge it efficiently, not scattered in a dust collecting device. The vacuum cleaner includes a body, a dust separation device mounted in the body, a dust collection device independently provided from the dust separation device, connected to the dust collection device, a compression device provided in the dust collection device, to collect dust and foreign substances collected in a predetermined portion of the dust collection device and to compress the collected dust and foreign substances, and a liquid supply device provided in the dust separation device to supply liquid material to the dust separation device.

Abstract: A separating apparatus comprises a first cyclonic separating unit and a second cyclonic separating unit located fluidly downstream therefrom and including a plurality of second cyclones arranged fluidly in parallel about a first axis and grouped into at least a first and second set of second cyclones arranged about the first axis. Each cyclone in the first and second sets of second cyclones defines a longitudinal axis and includes a fluid inlet and a fluid outlet. The fluid inlets of the first set of second cyclones are spaced along the first axis from the fluid inlets of the second set of second cyclones, and each outlet of the cyclones in the first and second sets of second cyclones is in fluid communication with an outlet duct, wherein the outlet duct includes a first portion which extends between two of the cyclones of at least the first set of second cyclones.

Abstract: A vacuum cleaner comprising a cyclonic separating apparatus including a dirty air inlet, a main body connected to the cyclonic separating apparatus and a motor and fan unit for generating an airflow through the cyclonic separating apparatus from the dirty air inlet to a clean air outlet, wherein the cyclonic separating apparatus includes at least a first cyclonic cleaning stage and an elongate filter arranged fluidly downstream from the first cyclonic cleaning stage, the elongate filter being housed in a duct at least partially surrounded by the first cleaning stage, and wherein the filter comprises an inlet portion and a filter portion defining a generally tubular filter chamber, the inlet portion including one or more radially facing inlets to permit air to flow into the inlet portion in a radial direction from where the air flows from the inlet portion to the filter chamber in an axial direction.

Abstract: A cyclone separator useable in a surface cleaning apparatus comprises a cyclone casing defining a cyclone chamber and having first and second opposed ends and a sidewall extending between the first and second ends. A separated material collection chamber surrounds at least a portion of the cyclone chamber and is communication therewith via a separated material outlet. The separated material collection chamber is spaced at least about 0.5 inches from the cyclone chamber. In addition, the separated material collection chamber is spaced from the bottom of the cyclone by at least about 0.5 inches.

Abstract: An extractor cleaning machine including a base or foot moveable along a surface to be cleaned, and a handle pivotally coupled to the foot and moveable between an upright storage position and an inclined operating position. The cleaning machine also includes a recovery tank insertable into a space between the foot and the handle. The handle is positioned directly over at least a portion of the recovery tank when the handle is in the upright storage position, and the recovery tank is removable from the space while the handle is in the upright storage position.

Abstract: A cyclone separator for a vacuum cleaner. The separator has a cyclone chamber, an air entrance device having a flow passage arrangement therethrough for introducing an air stream into the cyclone chamber in a manner that causes the air stream to swirl in the cyclone chamber to remove dust from the air stream, and an air outlet for emitting the air stream from the cyclone chamber. The entrance device has a control member that is operable to alter the flow passage arrangement such that one or more properties of the air stream in the cyclone chamber are affected by the alteration. The flow passage arrangement has a first path and a second path, and the control member is operable to alter the flow passage arrangement by redirecting the air stream from the first path to the second path.

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 includes an electric air blower; a dust separator placed at an upstream side of the electric air blower and having a filtration filter for taking in dust-containing air sucked by the electric air blower and separating the dust from the air; and a dust accommodating section for accommodating the dust separated by the dust separator. The filtration filter includes a plurality of through-holes penetrating from an upstream surface at an upstream side to a downstream surface at the downstream side, and a central axis of the through-hole is inclined with respect to a normal line direction of a surface of the filtration filter.

Abstract: The present disclosure provides a home cleaning appliance including a housing having a nozzle, which includes a main suction opening. An airstream suction source is mounted to the housing and includes a suction airstream inlet and a suction airstream outlet. A cyclone main body is mounted to the housing and communicates with the nozzle main suction opening. The cyclone main body includes a first stage separator and a plurality of second stage separators. A dirt cup is connected to the cyclone main body for collecting dust particles separated by the first stage separator and the plurality of second stage separators. An air manifold is mounted to the first stage separator for fluidly connecting the first stage separator to the plurality of second stage separators.

Abstract: A vacuum cleaner having a dual locking structure is provided. The vacuum cleaner includes a brush assembly, a main body connected to the brush assembly, a dust bin arranged on the main body, a fastening unit to move the dust bin to a fastened or unfastened state, and a filter casing. The dust bin includes one or more first locking holes and the main body includes one or dust bin locking members to be engaged with the first locking holes so that the dust bin, in an unfastened state, is removably retained in the main body. The filter casing includes one or more filter casing locking portions and the main body includes one or more filter casing locking members to be engaged with the filter casing locking portions so that the filter casing in the unfastened state is removably retained in the main body.

Abstract: A cleaning appliance of the canister type includes separating apparatus for separating dirt from a dirt-bearing fluid flow, a floor engaging rolling assembly comprising a device for drawing the fluid flow through the separating apparatus, a chassis connected to the rolling assembly, a duct moveable relative to the chassis for conveying the fluid flow to the separating apparatus, a floor engaging steering member for steering the rolling assembly, and a control mechanism for moving the steering member relative to the rolling assembly in response to movement of the duct relative to the chassis.