Upright vacuum cleaner with cyclonic air flow
US6782585B1 · kind B1 · utility
267Cited by
90References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2000 |
| Grant date | Aug 31, 2004 |
| Priority date | — |
| Expiry date | Oct 5, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/03
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A vacuum cleaner has a first cyclonic cleaning stage and a second cyclonic stage positioned in series with the first cyclonic cleaning stage. The second cyclonic stage comprises a plurality of second stage cyclones. A passage connects the first cyclonic cleaning stage outlet and the second stage cyclones inlets. The passage does not increase in cross-sectional area in a downstream direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.