Vacuum cleaner
US10638902B2 · kind B2 · utility
4Cited by
45References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2017 |
| Grant date | May 5, 2020 |
| Priority date | — |
| Expiry date | May 24, 2038 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L9/244
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A vacuum cleaner includes an air treatment or debris removable assembly with a multi-layer filtration stage. The multi-layer filtration stage can include an outer mesh screen, a louvered exhaust grill, and a multi-layer filter. Optionally, an inner perforated exhaust grill is also provided. The debris removable assembly can further include a cyclonic filtration stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.