Double brush-roll vacuum cleaner

Details Double brush-roll vacuum cleaner Double brush-roll vacuum cleaner

1988-09-15

1989-07-25

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15389, A47L 530

Patent

active

048500771

ABSTRACT:
The invention consists of an upright vacuum cleaner having two oppositely rotating brush rolls, eliminating substantially all the resistance to movement of the cleaner along a carpet caused by a single brush roll. A single belt drives both rolls. The rear brush roll has two circumferential grooves, to accommodate the incoming and outgoing runs of the belt to reduce friction and wear. The belt is twisted 180.degree. between the rolls, and runs in a single groove in the front brush.

REFERENCES:
patent: 664135 (1900-12-01), Dufour
patent: 1268963 (1918-06-01), Gray
patent: 1891504 (1932-12-01), Smellie
patent: 1939579 (1933-12-01), Swartz
patent: 4426751 (1984-01-01), Nordeen
patent: 4654927 (1987-04-01), Novinger

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