Vacuum cleaner
US7306640B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2003 |
| Grant date | Dec 11, 2007 |
| Priority date | — |
| Expiry date | Oct 9, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/03
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A vacuum cleaner includes a first dirt separation unit and a second dirt separation unit. The first dirt separation unit has a first inlet port through which a suction air stream including dirt particles is introduced thereinto, and the second dirt separation unit has a second inlet port through which the air stream introduced into the first dirt separation unit is introduced into the second dirt separation. The first and the second inlet port are disposed such that they are not registered with each other. Accordingly, the dirt particles suctioned are separated in two stages, thereby decreasing the possibility of occlusion of a filter and rapid deterioration of a suction force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.