Patent · US Expired

Electric motor controlled as an electroacoustic transducer

US6753663B2 · kind B2 · utility

3Cited by

8References

41Claims

0Family size

Assignee

The Braun Corporation · DE

Inventors

Philipp Jung · Griesheim, DE
Peter Trawinski · Weiterstadt, DE

Key dates

Filing date	Jan 23, 2002
Grant date	Jun 22, 2004
Priority date	—
Expiry date	Jan 28, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH02P7/00
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An appliance for personal use such as a toothbrush, an oral irrigator, a shaver, or a kitchen machine, with a driving mechanism constructed as an electric motor and a control stage that supplies energy to the electric motor. When the electric motor is off, the control stage supplies the electric motor with energy adapted in terms of duration and/or amplitude. The electric motor, when off and in its capacity as an electroacoustic transducer, emits at least part of that energy in the form of audible signals.

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