Mobile machine tool, especially table saw

US6431043B1 · kind B1 · utility

Assignee

• Elektra Beckum AG · DE

Inventors

• Bernhard NIEMANN · Erlangen, DE
• Hermann Rugen · Meppen, DE

Key dates

• Filing date: Nov 20, 2000
• Grant date: Aug 13, 2002
• Expiry date: Nov 20, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T83/7805
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A portable machine tool, especially a portable table saw, having an outer casing, an electric drive motor (2) arranged in the casing, and a connecting device (3) for connecting the drive motor to a power supply network having a low system frequency, and a tool (4), especially a circular saw blade, that is driven by the drive motor (2) in which the drive motor is a synchronous or asynchronous motor, the connecting device is a frequency converter (5) which converts the low system frequency of the power supply network to a high operating frequency, the drive motor operating at a high speed corresponding to that of the high operating frequency while the tool is driven at a lower speed suitable for machining purposes by being coupled to the drive motor via a speed-reducing gear train (6).