Abstract: A connecting joint arrangement connectable between two assemblies that are free to move with respect to each other, the arrangement comprises a connecting element, a pin joint, and a support element having a support body. The support body is connectable to one of the two assemblies by a working connection including the connecting element and the pin joint. The connecting element has a pivot bearing for receiving a pivot bearing support element on the assembly to be supported. Although it is offset from the pin joint, the pivot bearing is functionally in series to the pin joint.

Abstract: A rotatable tool for friction stir welding a workpiece and an associated apparatus and method are provided. The tool includes a first pin portion that extends from a shoulder and defines a contour surface opposite the shoulder. A second pin portion extends from the contour surface of the first pin portion. The contour surface, which mixes the material of the workpiece during welding, can increase the mixing of the material at the interface, thereby increasing the strength of the joint.