A cleaner includes: a suction unit; a suction motor that generates suction force for sucking air through the suction unit and includes an impeller; a dust separation unit that includes one or more cyclone units generating cyclonic flow to separate dust from air flowing inside through the suction unit; a dust container that stores dust separated by the dust separation unit and is disposed under the suction motor; a battery disposed behind the dust container to supply power to the suction motor; and a handle disposed behind the suction motor, wherein a rotational axis of the impeller and an axis of the cyclonic flow vertically extend and an extension line from the rotational axis of the impeller passes through the one or more cyclone units.

A cleaner includes: a suction motor that generates suction force; a dust separation unit that is disposed behind the suction motor and separates dust from air sucked by the suction force of the suction motor; a dust container that stores dust separated by the dust separation unit; a handle disposed behind the dust separation unit; a battery housing disposed under the handle; and a battery that is detachably coupled to the battery housing and is separable downward from the battery housing.

A cleaner includes: a suction motor that generates suction force; a dust separation unit disposed under the suction motor and separates dust from air; a handle disposed behind the suction motor; and a battery disposed under the handle and behind the dust separation unit to supply power to the suction motor.

A vacuum cleaner having a cyclone and dual inlet passages, each inlet passage extending to a tangential air inlet of the cyclone.

A vacuum cleaner includes an air treatment or debris removable assembly with a multi-layer filtration stage. The multi-layer filtration stage can include an outer mesh screen, a louvered exhaust grill, and a multi-layer filter. Optionally, an inner perforated exhaust grill is also provided. The debris removable assembly can further include a cyclonic filtration stage.

A cleaner includes a suction unit guiding air and dust, a main body including a first cyclone unit separating the air and the dust, which are suctioned through the suction unit, from each other and a second cyclone unit separating the dust from the air discharged from the first cyclone unit, and a guide unit disposed in the main body to partition a first dust storage part, in which the dust separated in the first cyclone unit is stored, and a second dust storage part, in which the dust separated in the second cyclone unit is stored, from each other. The guide unit is separably coupled to the main body, and when the guide unit is separated from the main body, a dust discharge part of the second cyclone unit is exposed to the outside.

A brushroll dowel for a vacuum cleaner has a bristle stiffener protruding from a brush dowel. A plurality of stiffened bristles protrude from the brush dowel adjacent to the bristle stiffener, and a plurality of unstiffened bristles also protrude from the brush dowel and are non-adjacent to the bristle stiffener.

A cleaner includes a suction motor that generates suction force, a dust separation unit that is disposed under the suction motor and separates dust from air, a handle disposed behind the suction motor, and a battery disposed under the handle and behind the dust separation unit to supply power to the suction motor.

A surface cleaning apparatus includes a housing that supports a suction source, a dirt separation device that has an elongate axis, and a user graspable handle having an elongate axis. A passage member transports dirt-laden air to the dirt separation device. The passage member has an elongate axis. The elongate axis of the passage member and the elongate axis of the user graspable handle lie in a plane. The elongate axis of the dirt collection chamber intersects the plane. During operation, while the housing is supported on a floor surface, the elongate axis of the dirt separation device is parallel with the floor surface.

A vacuum cleaner or a docking station has momentum separator having first and second sidewalls which are porous. A first air flow chamber is located exterior to the momentum separator between a first end wall, which is spaced from and faces the first side screen, and the first side screen. A second air flow chamber is located exterior to the momentum separator between a second end wall, which is spaced from and faces the second side screen, and the second side screen. In operation, air exits the momentum separator through the first and second side screens and travels through the first and second air flow chambers to the air outlet of the first and second air flow chambers.