Patent ID: 6851936

Claim:
A vacuum producing device comprising at least one ejector device, having a jet nozzle with a receiving nozzle placed downstream from it with a draw off zone defined in a transition zone between the jet nozzle and the receiving nozzle, a receiving space being present at an outlet end of the receiving nozzle, said receiving space serving for a fluid flowing through the receiving nozzle, an exit flow duct leading off from said space, means for influencing the fluid flow through the exit flow duct, wherein the exit flow duct's rated diameter as measured at a point minimum cross section of the exit flow duct is larger than the jet nozzle duct's rated diameter as measured at a minimum cross section of the jet nozzle duct and is smaller than the receiving nozzle duct's rated diameter as measured at a point of minimum cross section of the receiving nozzle duct.