Patent ID: 7246410
Filing Date: 2007-07-24
Classification: A47L

Abstract:
1. A vacuum cleaning tool for a vacuum cleaning device, the vacuum cleaning tool comprising: a housing having a turbine chamber and a bottom plate, wherein the bottom plate has a working slot; a rotatingly driven working tool rotatably supported in the housing so as to act through the working slot onto a surface to be worked on; an air turbine arranged in the turbine chamber and having opposed axial end faces forming a gap together with side walls of the turbine chamber, respectively; wherein the air turbine is drivingly connected to the working tool for driving the working tool; wherein a turbine chamber wall of the turbine chamber has a first intake window and at least one second intake window, wherein the first intake window supplies a driving suction air stream to the air turbine and the at least one second intake window supplies a partial suction air stream to the turbine chamber; wherein the driving suction air stream is supplied to a peripheral turbine surface on a first side of a plane that extends through a rotational axis of the air turbine and wherein the partial suction air stream enters the turbine chamber on a second side of the plane extending through the rotational axis of the air turbine; wherein a cross-sectional area of the at least one second intake window overlaps at least partially at least one of the gaps such that a portion of the partial suction air stream flows into the at least one gap.