Exhaust filter arrangement for vacuum cleaner housing
US7284298B2 · kind B2 · utility
4Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 6, 2004 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | Jan 13, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L9/0081
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An exhaust filter unit is arranged outwardly surrounding at least a major portion of a housing of a vacuum cleaner. The dirt-laden incoming airflow is filtered through a primary filter, then blown by a suction motor unit into an annular exhaust air space between the vacuum cleaner housing and the exhaust filter unit. Thereby, the filtered air is exhausted in a diffused manner through the large surface area of the exhaust filter unit. Preferably, the exhaust filter unit has a cylindrical tubular configuration that completely externally surrounds a cylindrical portion of the vacuum cleaner housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.