A nozzle assembly for a vacuum cleaner includes a driving member including a first driving shaft and a second driving shaft in both sides thereof, a first drum of which one end is coupled to the first driving shaft to be driven by directly receiving driving force of the first driving shaft, and a second drum of which one end is coupled to the second driving shaft to be driven by directly receiving driving force of the second driving shaft.

A vacuum cleaner nozzle assembly having an inlet opening, a height adjustment mechanism configured to adjust a vertical position of the inlet opening relative to a surface to be cleaned, a suction passage fluidly connected to the inlet opening, a bypass opening fluidly connected to the suction passage, and a bleed valve. The bleed valve has a closed position in which the bleed valve blocks the bypass opening, and an open position in which the bleed valve does not block the bypass opening to allow a flow of air through the bypass opening and into the suction passage. The bleed valve is configured to move from the closed position to the open position in response to an adjustment of the height adjustment mechanism.

A vacuum cleaner nozzle assembly having an inlet opening, a height adjustment mechanism configured to adjust a vertical position of the inlet opening relative to a surface to be cleaned, a suction passage fluidly connected to the inlet opening, a bypass opening fluidly connected to the suction passage, and a bleed valve. The bleed valve has a closed position in which the bleed valve blocks the bypass opening, and an open position in which the bleed valve does not block the bypass opening to allow a flow of air through the bypass opening and into the suction passage. The bleed valve is configured to move from the closed position to the open position in response to an adjustment of the height adjustment mechanism.

A surface cleaning head with dual rotating agitators (e.g., a leading roller and a brush roll) may be used to facilitate capturing of debris in the air flow into a suction conduit on the underside of the surface cleaning head. The leading roller is generally positioned adjacent to and in advance of the opening of the suction conduit. The rotating brush roll may be located in the suction conduit with the leading roller located in front of and spaced from the brush roll, forming an inter-roller air passageway therebetween. The leading roller may provide a softer cleaning element than the brush roll and may also have an outside diameter that is less than the outside diameter of the brush roll. The surface cleaning head may also include debriding protrusions contacting the leading roller and/or a leading bumper that extends in front of the leading roller.

An apparatus for cleaning a floor surface including an upright part having a user graspable handle and a base assembly including a first base part connected to the upright part and a second base part connected to the first base part. The second base part includes a cleaning member. The apparatus further includes a device for effecting movement of the first and second base parts relative to each other. The device effects movement of the second base part between respective first and second conditions and the second base part has a first passage with a respective inlet and a second passage with a respective inlet. When the second base part is in its second condition the inlet of the second passage is positioned closer to a floor surface than it is positioned when the second base part is in its first condition.

An apparatus for cleaning a floor surface including an upright part having a user graspable handle; a base assembly is connected to the upright part and includes a base part having a first passage with a respective inlet; and a second passage with a respective inlet. The apparatus includes a device for effecting movement of the base part between respective first and second conditions, and a suction source for providing suction to one or both of the first and second passages. As the base part is moved between its first and second conditions by the device, the suction provided to one or both of the first and second passages is changed.

An apparatus for cleaning a floor surface including an upright part having a user graspable handle; a base assembly is connected to the upright part and includes a base part having a first passage with a respective inlet; and a second passage with a respective inlet. The apparatus includes a device for effecting movement of the base part between respective first and second conditions, and a suction source for providing suction to one or both of the first and second passages. As the base part is moved between its first and second conditions by the device, the suction provided to one or both of the first and second passages is changed.

A floor tool for an apparatus having a source of suction for cleaning a floor surface, the floor tool includes a base assembly including a base part having a first passage with a respective inlet, and a second passage with a respective inlet. A device for effecting movement of the base part is between respective first and second conditions, and the first and second inlets are positioned in respective planes.

A vacuum cleaner nozzle having a housing, a bleed valve, and a support. The housing has an inlet, an outlet, a suction passage, a bypass opening, and a bypass passage connecting the bypass opening to the outlet. The valve is movable between a closed position in which the valve blocks the bypass passage, and an open position in which the valve does not block the bypass passage. The support has a lever arm. The support moves between a first position in which the lever arm allows the bleed valve assembly to remain in the closed position and the support holds the inlet opening at a first distance from a surface, and a second position in which the lever arm holds the valve in the open position, and the support holds the inlet opening a second distance from the surface, the second distance being greater than the first distance.

A vacuum cleaner nozzle having a housing, a bleed valve, and a support. The housing has an inlet, an outlet, a suction passage, a bypass opening, and a bypass passage connecting the bypass opening to the outlet. The valve is movable between a closed position in which the valve blocks the bypass passage, and an open position in which the valve does not block the bypass passage. The support has a lever arm. The support moves between a first position in which the lever arm allows the bleed valve assembly to remain in the closed position and the support holds the inlet opening at a first distance from a surface, and a second position in which the lever arm holds the valve in the open position, and the support holds the inlet opening a second distance from the surface, the second distance being greater than the first distance.