Patent · US Active

Hand-held machine tool comprising a disconnector

US11084142B2 · kind B2 · utility

2Cited by

5References

23Claims

0Family size

Assignee

FESTOOL GMBH · DE

Inventors

Nico Walker · Böhmenkirch, DE
Stefan Tulodziecki · Hamberg, DE
Bernhard Kramer · Markdorf, DE

Key dates

Filing date	Apr 10, 2017
Grant date	Aug 10, 2021
Priority date	—
Expiry date	Sep 1, 2037

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23Q2717/00
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A hand-held machine tool, in particular a sanding machine, including a handle element for the user to grip and a processing head which has an electric drive motor for driving a tool holder provided for holding a processing tool, the hand-held machine tool having a power supply system for supplying power to the drive motor by means of a cable arrangement, via which the drive motor and the power supply system are interconnected. A protection circuit including at least one electric disconnector is arranged on the drive motor, in order to disconnect a connection between at least one electric cable of the cable arrangement and a phase of a field coil arrangement of the drive motor, which phase can be supplied with current via the cable.

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