In a vacuum drill dust extractor having a pot-shaped housing through which a rotatably drivable drill can be passed axially, and having a piston unit which is arranged axially displaceably in the housing, cooperates with a drill-side stop, contains an induced draft blower device and can be set against an associated stop on the housing side by means of a spring over which it engages, a high degree of reliability and operational safety are achieved in that at least one induced draft blower provided with its own drive motor and an energy storage unit provided with a charging socket and associated with each motor driving an associated induced draft blower are provided in the piston unit.

In a vacuum drill dust extractor having a pot-shaped housing through which a rotatably drivable drill can be passed axially, and having a piston unit which is arranged axially displaceably in the housing, cooperates with a drill-side stop, contains an induced draft blower device and can be set against an associated stop on the housing side by means of a spring over which it engages, a high degree of reliability and operational safety are achieved in that at least one induced draft blower provided with its own drive motor and an energy storage unit provided with a charging socket and associated with each motor driving an associated induced draft blower are provided in the piston unit.

A filter cleaning unit for a vacuum cleaner is provided, in particular a construction site vacuum cleaner, wherein the vacuum cleaner includes a turbine for generating a suction air flow and a filter for filtering the suction air flow. A suction channel is provided between the turbine and the filter, wherein the suction channel can be divided by a separating element into at least a first suction part channel and a second suction part channel, wherein the filter cleaning unit has at least one valve unit for opening or closing the suction part channels. A vacuum cleaner with such a filter cleaning unit, and a method for cleaning a filter of a vacuum cleaner with a filter cleaning unit is also provided. A controllable filter cleaning can be provided, in which the cleaning effect can be reinforced by the advantageous interaction of the filter cleaning unit and its components.

A filter cleaning unit for a vacuum cleaner is provided, in particular a construction site vacuum cleaner, wherein the vacuum cleaner includes a turbine for generating a suction air flow and a filter for filtering the suction air flow. A suction channel is provided between the turbine and the filter, wherein the suction channel can be divided by a separating element into at least a first suction part channel and a second suction part channel, wherein the filter cleaning unit has at least one valve unit for opening or closing the suction part channels. A vacuum cleaner with such a filter cleaning unit, and a method for cleaning a filter of a vacuum cleaner with a filter cleaning unit is also provided. A controllable filter cleaning can be provided, in which the cleaning effect can be reinforced by the advantageous interaction of the filter cleaning unit and its components.