Abstract: An apparatus for transporting or displacing elongated objects in a direction longitudinal to the object comprises a rotatable traction wheel including a first and a second disc. A plurality of arcuately shaped ridges are defined on opposing surfaces of the discs. The ridges extend substantially axially from the center of the discs to the circumferences of the discs. The first and second discs are journalled to a rotatable shaft. The axial and angular positions of one or both of the discs with respect to the shaft may be adjustable. The shaft may include an articulated joint to permit the angle of rotation of the first disc to be displaced from the angle of rotation of the second disc.

Abstract: The invention refers to a portable lathe device intended primarily for re-turning of worn-out brake discs of vehicles. The lathe device comprises a portable driving device, which via a clutch rotates the brake disc, when this is still mounted on the wheel shaft and the vehicle wheel being dismounted from the brake disc. A tool holder which can be attached to the mounting points for the dismounted brake yoke in the vehicle and which is provided with two individually adjustable lathe tools one for each side of the brake disc, is arranged adjacent to the driving device. The tool holder is movable radially to the brake disc. The driving device is prevented from rotating by motion preventing elements.