US Patent 8357872 Pipe-processing, in particular a pipe-cutting apparatus

A pipe processing apparatus containing a gripping mechanism with bracing rollers, further a drive wheel which is rotationally supported on the pipe processing apparatus and axially parallel to the bracing rollers and is positioned/positionable by its tread at such a site where said tread can make contact with the pipe held by the bracing rollers and can rotate said pipe by static friction; and a drive system to actuate the drive wheel.