Dual mode portable suction cleaner
US6448732B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 2000 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Aug 12, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S15/01
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A vacuum cleaner operates via power supplied from either an on-board battery or an AC power outlet. When the vacuum cleaner is operating by using the battery a controller monitors the voltage level in the battery and automatically shuts down the vacuum cleaner when the battery voltage has decreased below a preset level. This prevents a full drainage of the battery and increases its longevity. The controller that monitors the battery voltage level can be used with batteries of different voltages. The controller automatically determines which type of battery is being used and shuts down power to the vacuum cleaner motor after the appropriate amount of battery drainage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.