Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
2007-06-21
2009-08-11
Nguyen, Dung Van (Department: 3723)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C015S398000, C015S415100, C015S363000, C015S400000
Reexamination Certificate
active
07571514
ABSTRACT:
A dust absorption head of a vacuum cleaner including a main socket tube, a mounting cap, a vane wheel, a partition sleeve, and a dust absorption brush wheel to serve for attachment to a dust absorption pipe of a vacuum cleaner and for a rotational dust-absorption operation. The main socket tube and the mounting cap include at corresponding places an engaging projection and a plurality of positioning holes, allowing for adjustment of the operation angle of the dust absorption head according to different requirements. Meanwhile, a natural rotation of the vane wheel in response to the suction airflow of a vacuum cleaner is ensured for bringing the dust absorption brush wheel into rotation, thereby efficiently enhancing the dust-absorption effect.
REFERENCES:
patent: 2296429 (1942-09-01), Ell
patent: 4972541 (1990-11-01), Smith, Jr.
patent: 6574830 (2003-06-01), Huddleston
patent: 6802104 (2004-10-01), Redd
patent: 7437797 (2008-10-01), Ptak et al.
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