Hopper assembly with filter module for surface maintenance machine
US8458855B2 · kind B2 · utility
1Cited by
13References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 2, 2009 |
| Grant date | Jun 11, 2013 |
| Priority date | — |
| Expiry date | Jan 24, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01H1/0854
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A mobile surface maintenance machine with a debris hopper and a filter module providing at least two filter stages for separating dust and debris within the debris hopper, the filter module including a filter shaking mechanism and a housing adapted to seal against the upper opening of the debris hopper, and wherein the debris hopper is removed from air communication with the exhaust fan when the debris hopper is in a debris dump configuration and is returned to air communication with the exhaust fan when the debris hopper is lowered into an operational configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.