Patent · US Active

Device for registering an on state of a drive motor or a tool, and system

US10845435B2 · kind B2 · utility

0Cited by

0References

18Claims

0Family size

Assignee

Andreas Stihl AG & Co. KG · DE

Inventors

Kay-Steffen Gurr · Heilbronn, DE
Andre Vaas · Jagstzell, DE
Rudolf Saemann · Balingen, DE
Marc Saemann · Geislingen, DE

Key dates

Filing date	May 3, 2019
Grant date	Nov 24, 2020
Priority date	—
Expiry date	Jul 24, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH04Q2209/40
WIPO fieldControl
WIPO sectorInstruments

Abstract

A device registers an On state of a drive motor of a tool. A changing magnetic flux is produced in the On state of the drive motor. First and second peak hold detectors generate upper and lower peak signals from induced voltage output signals. An evaluation device is configured to form a difference from the generated upper peak signal and the generated lower peak signal, and compare the formed difference with an adjustable threshold value in order to determine the On state of the drive motor when the threshold value is reached or exceeded.

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