Patent ID: 7368671

Claim:
Vacuum conveying apparatus with a weighing and metering device, said vacuum conveying apparatus comprising: a separation container ( 10 ), acted on by a vacuum, for intermittent intermediate storage of material conveyed in a suction gas flow, a weighing device ( 50 ) for weighing of the separation container, a vacuum pump ( 70 ) and a controller, wherein: the separation container ( 10 ) is vacuumtight and comprises a vacuumtight discharge device ( 16 ); an entry opening ( 12 A) for entrance of conveyed material into the separation container ( 10 ) is connected in a vacuumtight manner through a first (working side) force isolation means to a suction conduit ( 40 ); an outlet opening ( 14 A) for exit of suction gas from the separation container ( 10 ) is connected in a vacuumtight manner through a second (pure gas side) force isolation means to a vacuum conduit ( 42 ); the vacuum pump ( 70 ) is isolated in terms of force from the separation container ( 10 ) and is also situated such that it is not weighed by the weighing device ( 50 ); the entry and outlet openings ( 12 A, 14 A) point in opposing directions; and, the first and second force isolation means comprise respective flexible, vacuum-pressure-resistant elements arranged at least approximately coaxially relative to each other.