Damage resistant recirculation flap
US5276933A · kind A · utility
38Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1992 |
| Grant date | Jan 11, 1994 |
| Priority date | — |
| Expiry date | Jul 2, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01H1/0854
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A surface maintenance machine includes a cylindrical brush mounted in the machine for rotation about a generally horizontal axis extending transverse to the direction of machine movement. A recirculation flap is attached to the machine and extends generally coextensively with the brush and parallel thereto. The recirculation flap is normally yieldingly urged toward the brush, with contact between the flap and a floor obstacle causing the flap to move, against the force of its mounting springs, away from the brush.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.