Vacuum cleaner with air bleed
US7278181B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2002 |
| Grant date | Oct 9, 2007 |
| Priority date | — |
| Expiry date | Jun 9, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L9/02
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A vacuum cleaner comprises a cyclonic separator (116) for separating dirt and dust from an incoming airflow. A tool (300) and a suction conduit (114) connect the tool (300) to the separator (116). The tool (300) comprises a main air inlet aperture for engaging with a surface to be cleaned and a bleed air inlet (310) for allowing air to bleed into the suction path. The bleed air inlet (310) is located such that it is separate from the main inlet. The cross-sectional area of the bleed air inlet (310) is sufficiently large that, in use, the bleed air inlet (310) admits a sufficient quantity of air to maintain adequate separation efficiency in the separator of the cleaner even when the main air inlet is fully blocked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.