Patent ID: 7743460

Claim:
A dust suction device ( 2 ), comprising a blower device ( 6 ) for generating an intake flow (S); a filter surface ( 16 ) for separating dust and dirt particles from the intake flow (S); a collecting chamber ( 18 ) for collecting the dust and the dirt particles which is arranged upstream of the filter surface ( 16 ) in a direction of the intake flow (S); a clean air chamber ( 20 ) which is arranged downstream of the filter surface ( 16 ) and is separated from the collecting chamber ( 18 ) by the filter surface ( 16 ), wherein the filter surface ( 16 ) can be acted upon in some areas by a cleaning flow of the blower device ( 6 ) which flows through the filter surface ( 16 ) in a direction opposite the direction of the intake flow (S); and an adjustable dividing wall ( 30 ) provided in the clean air chamber ( 20 ) and separating a vacuum area ( 40 ) that can be generated by the blower device ( 6 ), from an overpressure area ( 38 ) that can likewise be generated by the blower device ( 6 ).