Vacuum cleaning tool has optimized air turbine with total volume between axial ends of turbine, turbine casing of 40,000 to 170,000 mm3; center volume of about 30-45 per cent of total

摘要

The device has an air turbine for driving a working tool in an air turbine chamber with an inlet and an outlet window for a suction air flow. The total volume between the axial ends (47,48) of the air turbine and the air turbine casing (49) is 40,000 mm<3> to 170,000 mm<3> and the volume of the center, which has no blades, is about 30 to 45 per cent of the total volume. .