Vacuum cleaner
US5720076A · kind A · utility
3Cited by
5References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1996 |
| Grant date | Feb 24, 1998 |
| Priority date | — |
| Expiry date | Apr 30, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L5/367
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A vacuum cleaner has wheels which can rotate in one direction only, when the body of the cleaner is inclined to the horizontal, such as when the cleaner is disposed on a flight of stairs. A prop provides alternative or additional support by engaging the stair surface. The invention reduces the possibility of the cleaner rolling off the stair tread and falling down the stairs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.