Patent ID: 7234493

Claim:
An apparatus for transferring a dust-like, powder-like, grain-like or granule-like conveyed material from a storage container into a working or transfer container or similar receiving space, said apparatus comprising a working chamber ( 18 ) connected to a supply line ( 24 ) for the conveyed material and having a discharge cross section, where at least one feed line ( 46 ) for a flow medium opens into the working chamber ( 18 ) and a filter device is arranged between said feed line and the conveyed material, wherein the supply line ( 24 ) for the conveyed material opens into a filter space ( 31 ) and a filter insert ( 30 ) that delimits the latter is arranged in the working chamber ( 18 ), said working chamber being connected to an air line ( 52 ) and/or a gas line ( 54 ), wherein the working chamber ( 18 ) for receiving the filter insert ( 30 ) comprises a perforated inner tube ( 26 ), which inner tube defines a gap ( 29 ) with a housing ( 16 ) that delimits the working chamber and wherein a top cover ( 28 ) of the filter insert ( 30 ) is connected to a top plate ( 19 ) of the housing ( 16 ) by at least one fixing device ( 34 ), where the top plate separates a head space ( 18 f ), which adjoins the gap ( 27 ), from the filter space ( 31 ) of the filter insert ( 30 ).