A cleaner head for a vacuum cleaner includes a body that defines a suction chamber, the suction chamber having a suction inlet for engaging a surface to be cleaned, and an outlet for fluid connection to a suction generator of a vacuum cleaner. The cleaner head further includes first and second brush bars each configured to contact a surface engaged by the suction inlet, and a drive mechanism which has an actuator. The drive mechanism is configured to rotate the brush bars about respective axes. The drive mechanism is also configured to rotate the first brush bar independently of the second brush bar, and to rotate the second brush bar independently of the first brush bar.

A dusting device for a cleaning machine, being capable of detachably assembled to a bottom of the cleaning machine, includes at least a first rotary disc, a second rotary disc, an idler pulley, a driving rope unit, and dusting elements respectively attached to the first and second rotary discs. The driving rope unit is movably disposed on the first rotary disc, the idler pulley, and the second rotary disc. The first rotary disc is driven to rotate by a motor installed in the cleaning machine, and the idle pulley is driven to rotate by the driving rope unit and the first rotary disc, so as to further drive the second rotary disc to rotate in conjunction with the first rotary disc, whereby enabling the dusting elements to rotate to dust and clean a surface to be cleaned.

A brush vacuum cleaner having a floor brush set with a driven brush roller having an overload protection. The brush set has at least one electric motor for a suction fan and for the drive of the brush roller, which includes a torque detecting unit. A safety shutdown is accomplished via a switch arrangement above an overload torque threshold. A driven element of the torque detection unit is disposed in the drive train which, above the torque threshold, is coupled via a switchable coupling element to an eddy current disk made of electrically conductive material. The eddy current disk has at least one magnet pivotably positioned on a fixedly mounted movable support. An adjustment of the support is made by a magnetic field of the coupled eddy current disk formed by the generated eddy current. The support controls a corresponding circuit arrangement such as a switching element as safety cut-off.

A vacuum cleaner has an agitator assembly, a belt drive system coupling the agitator assembly to a motor via a belt, and a belt shifting assembly which selectively shifts the belt between a drive pulley and an idler pulley on the agitator assembly. Trace rotational force transmitted to the agitator assembly when the belt is on the idler pulley is prevented from causing the agitator assembly to rotate by an anti-rotation member of the belt shifting assembly.

A vacuum cleaner includes a suction nozzle defining a nozzle inlet, a manual nozzle height adjustment assembly for adjusting the height of the nozzle inlet relative to a surface to be cleaned, and a bleed valve fluidly connected to a working air path of the vacuum cleaner to selectively open to reduce suction at the nozzle inlet. The bleed valve is incorporated with the nozzle height adjustment assembly such that movement of the nozzle height adjustment assembly between different height settings will automatically open or close the bleed valve.

Techniques disclosed herein provide access to a markup document form. A user interface virtualization (UIV) agent identifies name fields and input fields in rows of the markup document form. The UIV agent maps each of the name fields to a respective one of the input fields to identify name-input pairs. The UIV agent generates user interface (UI) metadata having row metadata specifying the rows of the markup document and name-input pair metadata specifying the name-input pairs. The UIV agent sends the UI metadata to a mobile client device configured to render a form having UI elements native to the mobile client device based on the UI metadata.

The present invention relates to the technical field of cleaning, in particular to a cleaning appliance, which comprises a cleaning appliance body. The cleaning appliance body includes a housing, two brush rollers disposed at the bottom of the housing, a drive mechanism disposed in the housing and configured to drive the two brush rollers to rotate, and a dust collector disposed on the housing; a suction port of the dust collector is disposed between the two brush rollers; and both rotation directions of the two brush rollers direct towards the suction port. The cleaning appliance provided by the present invention adopts a combined structure of the two brush rollers and the dust collector; both rotation directions of the two brush rollers direct towards the suction port; dust, particulate waste or flocks are gathered; the waste is sucked into the dust collector through the suction port between the two brush rollers.

A brushroll for a vacuum cleaner includes a dowel defining a central rotational axis about which the brushroll rotates, at least one bristle stiffener, a plurality of first bristles protruding from the dowel adjacent to the bristle stiffener, and a counterbalance which is positioned relative to the bristle stiffener to rotationally balance the brushroll, wherein the cross-sectional shape of the dowel is asymmetrical.

A cleaner head for a vacuum cleaner includes a suction cavity having an opening through which debris enters the cleaner head, and an outlet. An agitator is mounted in the suction cavity in a cantilevered manner for rotation relative thereto. The agitator includes a core which is conical in shape and has a first, free end and a second end which has a larger diameter than the first end. The cleaner head includes an agitator engaging member for pressing against the agitator any debris which has become wrapped around the agitator.

A brushroll for a surface cleaning apparatus includes a brush dowel defining an axis and having opposing bristle supports and a shroud surface between the opposing bristle supports, and a plurality of bristles protruding from the bristle supports. The shroud surface includes opposing convex curved surfaces extending between the bristle supports which intersect the shroud surface at outside corners.