Automatic vacuum cleaner
US4173809A · kind A · utility
17Cited by
4References
2Claims
0Family size
Inventor
Key dates
| Filing date | Jun 30, 1978 |
| Grant date | Nov 13, 1979 |
| Priority date | — |
| Expiry date | Jun 30, 1998 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L11/4066
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
In a preferred embodiment, a battery embodying and driven vacuum cleaner having a battery-recharging unit, having a pivoted and pivotably-driven driven wheel indirectly driven by an electric motor powered by the battery, and having other free-wheeling support wheels supporting the vacuum cleaner structure, and a vacuum cleaner vacuum motor driven by the electric motor, and a timer unit for setting the time of beginning and ending period of vacuuming, adapted to move randomly across a carpet and to change direction of movement whenever an obstacle is encountered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.