Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1990-04-11
1990-12-11
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15322, 15392, A47L 530, A47L 904
Patent
active
049760033
ABSTRACT:
In a vacuum cleaning apparatus of the dry, wet and wet/dry types having a cleaning head assembly, a rotatable brush carried within and spanning said head assembly adapted to loosen and agitate dirt on a surface to be cleaned, means for rotatably driving said brush, a dirt collection zone, and vacuum means communicating with the interior of said cleaning head assembly for sucking up dirt and carrying it to said dirt collection zone; the improvement comprising said brush being rotatable about a horizontal shaft, the shaft being carried at each of its ends by a movable shaft block, said shaft block being slidably received in a shaft block retainer case affixed to said cleaning head assembly, each of said shaft blocks being carried within its respective shaft block retainer case by resilient spring means biasing said shaft blocks and brush toward said surface to be cleaned, whereby each of said shaft blocks can independently slidably move upwardly within said shaft block retainer cases in response to variations in the surface or nap height of rug to be cleaned to automatically maintain contact between said brush and the surface to be cleaned.
REFERENCES:
patent: 2614283 (1952-10-01), Thornwald
patent: 3639941 (1972-02-01), Kirwan et al.
patent: 3802026 (1974-04-01), Crener
patent: 4139922 (1979-02-01), Fitch
patent: 4361929 (1982-12-01), Jinkins
Moore Chris K.
Mueth Joseph E.
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