Dust extraction unit with an intermediate coupling

摘要

The unit (5) has a wall that partly encloses the dust separation unit, where the wall comprises an intermediate clutch (12) with a drive counter-coupling i.e. tooth clutch, accessible from exterior of the dust separation unit and an output counter-coupling accessible from interior of the dust separation unit. The intermediate clutch covers an aperture in a wall of the dust separation unit and comprises a circulating edge (13) that is supported in an annular groove of the wall of the dust separation unit. Independent claims are also included for the following: (1) a system comprising a filter (2) a vacuum cleaner comprising a cleaning motor.