Spring loaded vacuum cleaner nozzle
US6591447B2 · kind B2 · utility
15Cited by
9References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2001 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Jul 1, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L5/34
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A vacuum cleaner of the fixed or floating nozzle type wherein a spring is utilized for urging the suction nozzle into the carpet pile to maintain and improve nozzle suction over a wide range of carpet pile heights and types. Such cleaners often lose nozzle suction as the pile height of the carpet increases and forces the suction nozzle upward away from the carpet. The addition of a spring to force the suction nozzle downward restores and improves nozzle suction and thereby improves overall cleaning efficiency of the vacuum cleaner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.