Vacuum cleaner providing filter-absence detection
US8667639B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 2006 |
| Grant date | Mar 11, 2014 |
| Priority date | — |
| Expiry date | Nov 6, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L9/122
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A vacuum cleaner having a filter assembly 12 disposed on grill 16 between the bag chamber 7 and motor chamber 13. Bag chamber 7 has a cover 8. Filter assembly 12 has an upstanding wall 15 provided with a covering of resilient material, e.g. rubber. The cover 8 is formed with a grill 14 in a lower region. When the filter assembly is correctly installed, and the cover 8 is in position, the resilient covering of the upstanding wall 15 rests in sealing contact against the inner surface of the cover 8 and over the grill 14. If the filter assembly 12 is absent, the grill 14 provides direct fluid communication between the bag chamber 7 and the atmosphere. The cleaner will be ineffective in picking up dirt thereby alerting the user to the absence of the filter assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.