Abstract: An electronically commutated motor for dust exhausters with a stator with excitation windings and with a rotor positioned to rotate in an air gap. The rotor has bundled laminations and permanent magnets around its circumference corresponding to the number of poles of the stator. A fan rotor of a ventilator is also provided on the rotor shaft, with the fan rotor connected downstream from the motor in the intake direction of the cooling air. The rotor shaft is connected with a turbine for generation of an intake air current, wherein the fan rotor is positioned in the upper bearing plate of the turbine. The bearing plate is designed in one piece in immediate vicinity of the turbine rotor and has indentations and cutouts in a radially outward direction, whereby air currents of the fan rotor and the turbine rotor flow each from its respective side, with the exit slots for cooling air from the fan rotor and the outlets for the exhaust from the turbine going out from the bearing plate.

Abstract: A dust exhauster is described whose electric motor is designed as a commutatorless dc motor. The electrical and electronic components of the dust exhauster are positioned according to the invention within the motor cooling air intake channel. Consequently, they are directly cooled by the stream of cooling air, resulting in a substantially extended service life for these components. Furthermore, the motor with its components is relatively small in design.

Abstract: A high-pressure press-in fitting for a high-pressure hose connection with a quick connect screwed joint at the outside of a high-pressure purifying installation, characterized in that the press-in fitting of the quick-connect coupling, receiving the end of the hose on the side of the appliance and designed as a plug-in coupling, has in the flow-through area a molded-in verturi insert and is provided on the front end with a peripheral groove which communicates witha chemical additives-feeding cross bored hose coupling at the side of the appliance aligned with the annular groove, whereby there is communicating connection between the flow-through area and the cross-bore.