Vacuum cleaner brush having string guard means

Details Vacuum cleaner brush having string guard means Vacuum cleaner brush having string guard means

1982-02-22

1983-09-13

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15391, A47L 900

Patent

active

044033729

ABSTRACT:
A vacuum cleaner beater brush having string guard means for preventing string picked up by the brush from damaging the bearings and drive for rotating the brush. In the illustrated embodiment, the drive is a cog belt drive with a sprocket associated with the rotatable brush. The ends of the brush are rotatably journaled in bearings carried by the nozzle housing of the vacuum cleaner structure. The string guards are defined by spaces provided in the brush assembly defining zones of minimum energy to which zones the picked-up string tends to migrate in the rotation of the brush. The string guard spaces, in the illustrated embodiment, are defined by annular recesses and shoulders located suitably to prevent movement of the string to the bearings and cog belt drive sprocket.

REFERENCES:
patent: 1972745 (1934-09-01), Martinet
patent: 1973679 (1934-09-01), Bass
patent: 2260235 (1941-10-01), Smellie
patent: 3608333 (1971-09-01), Webb Selley et al.
patent: 3802026 (1974-04-01), Crener
patent: 3874017 (1975-04-01), Parker
patent: 4209873 (1980-07-01), Schaefer

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