Abstract: A portable vacuum cleaning system includes a portable vacuum unit for cleaning debris. The vacuum unit is powered by a self-contained first electric power storage device and may be carried with a strap in backpack-fashion. The system also includes a cart defining a receptacle for receiving the vacuum unit. The vacuum unit may be used when supported by the cart or when carried by an operator. A second electric power storage device is supported by the cart and electrically connectable to the vacuum unit for charging the first electric power storage device when the vacuum unit is supported by the cart. Further, when disposed in the cart, the vacuum unit is disposed at an angle of about 45 degrees allowing for ease of movement of the cart.

Abstract: The invention relates to filter cleaning in a vacuum having a switchable flap element, the cleaning of the filter or of parts of the filter being carried out by supplying a secondary air flow to the interior of the filter to be cleaned, and air being able to flow through the filters separately from each other from the outside to the inside in the vacuum container in a sealed manner, and a flap element disposed in a chamber housing being pivotable, by means of the pivoting of which openings may be closed and released, the secondary air flow reaching the surface of the filter to be cleaned from the inside toward the outside in pulses, characterized in that the flap element comprises at least two partial flaps, the pivoting of which is actuated by a pivot drive, the respective partial flap optionally closes the outflow opening of the respective filter chamber in the direction of the intake opening of the suction turbine, the blow-out side of the suction turbine delivers the created overpressure air into an overp

Abstract: An overload clutch (10) for a rotating agitation member (11) for a surface cleaning machine includes a clutch member (12) connected to the agitation member (11) to rotate therewith, a coupling member (20) rotatable relative to the clutch member (12), and a torque lever (40) having an end pivotally mounted to the coupling member (12). The other end of the torque lever (40) is biased to engage with the clutch member (12) such that the agitation member (11) is rotated together with the coupling member (20) when a torque load from the agitation member (11) is not greater than a preset level. The torque lever (40) pivots outward away from the clutch member (12) and disengages from the clutch member (12) to disconnect the torque lever (40) from the clutch member (12) when the torque load from the agitation member (11) is greater than the preset level.

Abstract: In order to measure the degree of filling of a dust collector (5), where the dust (15, 16) collected in the dust collector may be of a very varied composition ranging from very fine dust (15) to rather large particles (16), a high pressure difference and a low pressure difference are measured by two differential pressure meters (11, 12), where the one differential pressure meter (12) measures the pressure difference between the compartment (4) of the dust collector, in which the dust collector (5) is arranged, and a measurement position at the connecting stub (6) of the vacuum cleaner, as is known, while the other differential pressure meter (11) measures between two measurement positions inside the connecting stub (6).

Abstract: The present invention refers to a floor cleaning machine comprising a brush adapted to scrub the floor with a cleaning, i.e.

Abstract: An overload clutch (10) for a rotating agitation member (11) for a surface cleaning machine includes a clutch member (12) connected to the agitation member (11) to rotate therewith, a coupling member (20) rotatable relative to the clutch member (12), and a torque lever (40) having an end pivotally mounted to the coupling member (12). The other end of the torque lever (40) is biased to engage with the clutch member (12) such that the agitation member (11) is rotated together with the coupling member (20) when a torque load from the agitation member (11) is not greater than a preset level. The torque lever (40) pivots outward away from the clutch member (12) and disengages from the clutch member (12) to disconnect the torque lever (40) from the clutch member (12) when the torque load from the agitation member (11) is greater than the preset level.

Abstract: A suction apparatus is provided with noise reduction means in one or more airflow passages for reducing noise emission from an airflow generator or the like, wherein at least one airflow passage is provided with at least one indentation with a predetermined depth extending substantially perpendicularly to the general direction of the noise in the passage.

Abstract: The present invention relates to a cleaning and/or treatment device for cleaning and/or treating surfaces such as floors, pavements and carpets. The invention particularly relates to a cleaning and/or treatment device using cleaning/treatment solution, wherein the solution is recirculated and thereby used more than one time. The cleaning device comprises a filter unit for cleaning dirt from a dirty solution tank and means for recirculating said cleaned solution to a clean solution tank, wherein said filter unit comprise at least one cross-flow filter, said cross-flow filter preferably being a membrane filter. The invention also relates to a process of cleaning and/or treating surfaces using such a device.

Abstract: In a vacuum cleaner with a motor suction assembly (8) comprising a motor part and a suction part (6) providing a carrier air stream and a cooling air stream, respectively, the motor suction assembly (8) is built into a cover (7, 12, 13) with a cylindrical cavity (23). The cover (7, 12, 13) separates the carrier air stream from the cooling air stream, said cover thus being sealed (14) against the motor suction assembly (8) in such a way that the carrier air stream cannot be affected by the cooling air stream and vice versa. Furthermore, the motor suction assembly (8) is surrounded and protected by the cover (12, 13). In this way, a construction is provided using only one cover, eliminating the need to position two covers, one of which solely serves to separate the air streams, while the other cover, together with the first one, provide a compartment for receiving the motor suction assembly (8). Thus, in other words, two covers are replaced by a universal cover (12, 13).