Portable vacuum cleaning device
Device for treatment of surfaces, particularly for cleaning and polishing
Cobweb vacuum cleaner
Corded/cordless dual-mode power-operated device
Pest collection and disposal device
ApplicationNo. 636162 filed on 08/10/2000
US Classes:318/635, With signal-, voltage-, or current-limiting15/339, Combined, e.g., with signal or indicator318/139, BATTERY-FED MOTOR SYSTEMS318/245, Universal or A.C.-D.C. motors318/441, A.C. and D.C.318/442, Different voltages318/650With current, voltage or electrical power measuring instruments
ExaminersPrimary: Masih, Karen
Attorney, Agent or Firm
Foreign Patent References
International ClassG05B 011/01
AbstractA 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.
Field of SearchWith signal-, voltage-, or current-limiting
With current, voltage or electrical power measuring instruments
A.C. and D.C.
BATTERY-FED MOTOR SYSTEMS
Universal or A.C.-D.C. motors
A.C. and D.C.
Switched (e.g., switching regulators)
Combined, e.g., with signal or indicator