Vacuum cleaner brush having string guard means
US4403372A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1982 |
| Grant date | Sep 13, 1983 |
| Priority date | — |
| Expiry date | Feb 22, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L9/0444
- WIPO fieldFurniture, games
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.