Dual filter assembly for a vacuum cleaner
US6110248A · kind A · utility
43Cited by
67References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 31, 1998 |
| Grant date | Aug 29, 2000 |
| Priority date | — |
| Expiry date | Aug 31, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/03
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A dual filter assembly for a vacuum cleaner includes an annular inner filter mountable on a filter cage of the vacuum cleaner. The inner filter has a lower end and a retaining ring is attached to the lower end. An annular outer filter is removably mounted surrounding the inner filter, with a lower end of the outer filter supported by the retaining ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.