portable tool, portable expansion device, hydraulic piston / cylinder arrangement and process for operating a portable tool

摘要

patent summary: "portable tool, portable expansion apparatus, hydraulic piston / cylinder arrangement and process for operating a portable tool". A portable tool with a working head featuring a working part, driven by an electric motor and / or a hydraulic means, wherein the working part may be moved in one direction of travel, and the working head may be rotate along with the workpiece in the direction of the circumference with respect to the direction of travel. For advantageous execution it is suggested that the working head can rotate together with the working part hydraulically and / or through the actuation of the motor. furthermore, the invention relates to a portable expansion apparatus (1) for expanding pipe ends (37) with an expansion head (2) having multiple segments (4), whose segments (4) are arranged side by side in a circular shape, transversely to an expansion direction, and by means of an expansion mandrel (3) which admits the segments (4) are radially displaceable with respect to the circular shape arrangement. For advantageous execution it is suggested that the segments (4) may be rotated hydraulically and / or by actuating the motor together with the expansion mandrel towards the circumference of the circular arrangement. furthermore, the invention relates to a hydraulic piston / cylinder arrangement.