Electric vacuum cleaner
US7628830B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2007 |
| Grant date | Dec 8, 2009 |
| Priority date | — |
| Expiry date | Oct 30, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/03
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An electric vacuum cleaner includes a first dust separation device configured to separate sucked dust, a first dust collection section for collecting the separated dust, a second dust separation device configured to separate the dust, a dust removing device configured to remove the dust adhering to the second dust separation device, a second dust collection section for accumulating the removed dust, a partition wall for zoning the first dust collection section and the second dust collection section and an introduction opening for introducing the removed dust into the second dust collection section; the partition wall includes a communication opening for communicating the first dust collection section to the second dust collection section and an opening and closing member for closing either of the introduction opening or the communication opening and switching the closing to the other by rotating, and the opening and closing member closes the introduction opening with a negative pressure by an electric fan and closes the communication opening by its own weight when the electric fan is not driven.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.