Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1988-07-13
1990-04-03
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15159A, 15182, 15366, A47L 530
Patent
active
049128051
ABSTRACT:
A cylindrical power brush for a vacuum cleaner includes two types of bristle tufts. One type of bristle tuft is short and stiff for contacting and agitating a carpeted surface. The other type of bristle tuft is longer and softer for contacting a hard surface. In addition to the differences in length and bristle stiffness, the tufts for the hard surface contain substantially fewer bristles, whereby catching and rolling of carpet edges is avoided. One embodiment alternates types of bristle tufts in a row of bristle tufts. Another embodiment employs multiple rows of bristle tufts arranged such that a point on a surface being cleaned is contacted alternately by the two types of bristle tuft. Winding up of thread and hair on the axle of the rotating brush is avoided by overlapping annular extensions on a support wheel and a brush spindle. The brush support wheel is locked in place in the floor tool by a resilient locking tab integrally formed with one of the halves of the floor tool.
REFERENCES:
patent: 2459007 (1949-01-01), Taylor
patent: 2668979 (1954-02-01), MacFarland
patent: 3737937 (1973-06-01), Nordeen
patent: 4361929 (1982-12-01), Jinkins
patent: 4662027 (1987-05-01), Parker et al.
Bitzel Michael E.
Krasznai Charles Z.
Ryckman William D.
Black & Decker Inc.
Deutsch Barry E.
Moore Chris K.
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