Patent ID: 7171725

Claim:
A device for a vacuum cleaner comprising a particle separator, which is provided with an inlet ( 11 ) for dust laden air, an outlet ( 16 ) for the separated particles that is connected to a screw conveyor ( 18 , 19 ), and an outlet ( 14 ) for cleaned air that is connected adjacently to a vacuum source ( 15 ) to expel the cleaned air out of the device; wherein the screw conveyor ( 18 , 19 )is provided with an outlet part ending in a mainly closed chamber ( 23 ) for collecting the separated particles, wherein the screw conveyor comprises a screw ( 19 ) and a wall surface surrounding the screw and forming a conveying chamber ( 18 ), wherein the closed chamber ( 23 ) is formed by an extension of the wall surface of the conveying chamber ( 18 ).