Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
2007-07-24
2007-07-24
Till, Terrence R. (Department: 1744)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
Reexamination Certificate
active
10707558
ABSTRACT:
A vacuum cleaning tool has a housing having a turbine chamber and a bottom plate. A working tool is rotatably supported in the housing. An air turbine for driving the working tool is arranged in the turbine chamber and has axial end faces defining a gap relative to the chamber sidewalls. A turbine chamber wall has a first intake window and at least one second intake window. The first intake window supplies a driving suction air stream to the peripheral turbine surface on a first side of a plane that extends through the turbine axis. The second intake window supplies a partial suction air stream to the turbine chamber that enters the turbine chamber on a second side of the plane extending through the turbine axis. The second intake window overlaps at least partially at least one gap and the partial suction air stream flows into the gap.
REFERENCES:
patent: 5293665 (1994-03-01), Worwag
patent: 5802666 (1998-09-01), Jung
patent: 5907888 (1999-06-01), Oh
patent: 2002/0120999 (2002-09-01), Worwag
patent: 1120075 (2000-01-01), None
patent: 11-318778 (1999-11-01), None
Patent Abstracts of Japan, Title: Suction Device for Vacuum Cleaner and Vacuum Cleaner, Publication No. 11318778, Publication Date Nov. 24, 1999, Matsushita Electric Ind. Co. Ltd.
Düpro AG
Huckett Gudrun E.
Till Terrence R.
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