Patent · US Active

Discharge state indicator

US8148947B2 · kind B2 · utility

1Cited by

5References

8Claims

0Family size

Assignee

The Braun Corporation · DE

Inventors

Torsten Klemm · Bad Soden, DE
Gerrit Rönneberg · Darmstadt, DE

Key dates

Filing date	Dec 9, 2006
Grant date	Apr 3, 2012
Priority date	—
Expiry date	May 9, 2029

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB26B19/388
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A circuit for displaying the state of a battery that is almost discharged features a battery, an inductive load, and a controllable switch connected in series. The circuit also includes a display element connected in series with the inductive load and the battery. The controllable switch is opened when a voltage of the battery is lower than a first threshold level and is only closed again when the voltage of the battery is greater than a second threshold level. The circuit may also include a control circuit having a comparator which compares the voltage of the battery with the first threshold level and the second threshold level and triggers the controllable switch accordingly.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.