Integral vacuum fan housing
US8562704B2 · kind B2 · utility
1Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2011 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Aug 11, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L11/4033
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A filter box for a surface maintenance machine incorporating aspects of a fan housing. In one example, a filter box for a sweeping machine is provided with an impeller fan housing beneath a cylindrical filter. Operation of the impeller fan draws air from a debris hopper, through the cylindrical filter, and through an expansion chamber defined by a scroll conduit prior to outlet to atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.