Floor sweeper with auxiliary rotary brushes
US3978539A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1975 |
| Grant date | Sep 7, 1976 |
| Priority date | — |
| Expiry date | Jun 30, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L11/4069
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A floor sweeper having, in addition to its main brush roller, one or more auxiliary brushes for sweeping debris into the path of the main brush. Each auxiliary brush includes a brush body having an annular array of outwardly downwardly inclined brush bristles. A flexible drive ring is mounted concentric to said bristles and adjacent the roots thereof on the underside of the brush body. Both the ring and bristle tips are disposed in fixed parallel planes and the assembly is mounted on an axis which is fixed and inclined from the vertical in a manner so that the rearward brush edge will, upon forward sweeper movement, rotate transversely inwardly beneath the sweeper housing with a debris disturbing and flicking action. Downward force on the sweeper causes the drive ring to deform upwardly and to deflect the adjacent bristles in a direction away from the carpet to keep the brush-carpet friction forces generally equalized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.