A weld wheel cleaning system is provided to clean or remove a layer of embedded material and other debris produced from welding from the working surface of a weld wheel. Such a weld wheel cleaning system includes a cleaner with an abrasive material positioned on an outer surface of the cleaner. The cleaner is positionable adjacent to the weld wheel such that the abrasive material is aligned with the working surface of the weld wheel. An actuator can be used to selectively actuate the cleaner with a force sufficient to remove the layer of embedded material from the working surface of the weld wheel with the abrasive material. The debris from the cleaner can be removed by a vacuum.

A movable device includes: at least one lift generating unit for generating a pressure difference between opposite sides thereof to generate a lift force; a movable device body connected to the lift generating unit to be movable by means of the lift force generated by the lift generating unit; and at least one supply duct, the number of which corresponds to the number of the lift generating unit, wherein on end of the supply duct is disposed on one side of the lift generating unit and, when the lift generating unit operates, fluid is suctioned through the other end of the supply duct to be supplied into the lift generating unit.

A movable device includes: at least one lift generating unit for generating a pressure difference between opposite sides thereof to generate a lift force; a movable device body connected to the lift generating unit to be movable by means of the lift force generated by the lift generating unit; and at least one supply duct, the number of which corresponds to the number of the lift generating unit, wherein on end of the supply duct is disposed on one side of the lift generating unit and, when the lift generating unit operates, fluid is suctioned through the other end of the supply duct to be supplied into the lift generating unit.

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 surface cleaning apparatus includes a housing having an elongate axis (H) and supports a suction source, and a dirt separation device having an elongate axis (A). The dirt separation device includes a separator for separating dirt from dirt-laden air, and a dirt collection chamber for receiving separated dirt. The dirt separation device or a part of the dirt separation device is releasably connected to the housing. A passage member that transports dirt-laden air to the dirt separation device has an elongate axis (B). The dirt separation device is pivotally moveable relative to the housing to effect release of the dirt separation device.

A dirt separation device for a surface cleaning apparatus including: a separator for separating dirt from dirt-laden air; an inlet through which dirt-laden air is drawn into the separator; an outlet through which cleaner air exits the separator; a dirt collection chamber for receiving separated dirt; a cover member movable between a first position in which the cover member inhibits access to the dirt collection chamber and a second position in which the cover member permits access to the dirt collection chamber; an actuator device coupled to the cover member for effecting movement of the cover member from the first position to the second position, wherein the actuator device is rotationally movable, or an engagement part operably connected to the actuator device is rotationally movable, to effect movement of the closing member from the first position to the second position.

A system is comprised of a floor processing device, an object located in the environment of the floor processing device, which has a partial object area and a displacement device for automatically displacing the partial object area, a detection device, which is suitable for detecting a presence of the floor processing device in a detection area of the detection device, and a control device for generating a control command for the displacement device as a function of the detection result of the detection device. In order to prevent a collision with the floor processing device given automatic displacement devices of objects, the control command is suitable for deactivating the displacement device, thereby preventing a displacement of the partial object area even if the floor processing device is present in the detection area.

A multi-mode cleaning apparatus with suction may include a wand with a handle, a suction motor for providing suction, a bare floor unit configured to be movable by the wand and fluidly coupled to the suction motor, and a sweeper unit configured to be movable by the wand and fluidly coupled to the suction motor. The bare floor unit is configured for use in a suction only mode. The sweeper unit includes a rotatable brush roll and is configured for use in a brush roll only mode or a suction and brush roll mode.

A multi-mode cleaning apparatus with suction may include a wand with a handle, a suction motor for providing suction, a bare floor unit configured to be movable by the wand and fluidly coupled to the suction motor, and a sweeper unit configured to be movable by the wand and fluidly coupled to the suction motor. The bare floor unit is configured for use in a suction only mode. The sweeper unit includes a rotatable brush roll and is configured for use in a brush roll only mode or a suction and brush roll mode.

A weld wheel cleaning system is provided to clean or remove a layer of embedded material and other debris produced from welding from the working surface of a weld wheel. Such a weld wheel cleaning system includes a cleaner with an abrasive material positioned on an outer surface of the cleaner. The cleaner is positionable adjacent to the weld wheel such that the abrasive material is aligned with the working surface of the weld wheel. An actuator can be used to selectively actuate the cleaner with a force sufficient to remove the layer of embedded material from the working surface of the weld wheel with the abrasive material. The debris from the cleaner can be removed by a vacuum.