Patent ID: 6325572
Filing Date: 2001-12-04
Classification: B65G

Abstract:
A device for the pneumatic conveyance of a pulverulent substance having a specific gravity of 0.1 to 15.0 g/cm.sup.3 and a particle size of between 0.1 to 300 .mu.m comprising a container having an inner diameter (d) and a length (a) wherein the ratio between (a) and (d) is between 0.5 to 10.0, the container defines a pump chamber, the pump chamber having a pulverulent substance supply line and a pulverulent substance discharge line, a source of negative pressure connected to the pump chamber via a vacuum line for drawing into the pump chamber via the supply line the material to be conveyed, a source of conveying gas connected to the pump chamber via a conveying gas line for discharging from the pump chamber via the discharge line the material to be conveyed, shut-off members in the vacuum line and the conveying gas line, a flat filter element disposed on the container between both the source of the negative pressure and the source of conveying gas and the pump chamber and has a diameter which is .ltoreq.d, and means for vibrating the filter element.