Power tool

US5868208A · kind A · utility

Inventors

• Andreas Peisert · Stuttgart, DE
• Wolfgang Kofink
• Michael Nothofer · Stuttgart, DE
• Manfred Ludwig · Stuttgart, DE

Key dates

• Filing date: Jun 28, 1996
• Grant date: Feb 9, 1999
• Expiry date: Jun 28, 2016

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B25B21/02
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A power tool has a drive mechanism with an output shaft which performs an intermittent rotary motion. The output shaft drives, via an overrunning clutch, a tool drive shaft to drive a tool, which thus performs a quasi-continuous rotary motion that, as the load on the machine increases, transitions increasingly into a discontinuous rotary motion. The power tool can advantageously be used as a hand-held power tool for screwing, drilling, sawing, sanding, and the like, a high output torque with a low reaction torque being achievable as a result of the intermittent drive mechanism.