Abstract: A rotor (1) for an electric machine (25) which comprises a rotor support (2). The rotor support has cylindrical inner and outer shells (3, 4). A magnetic flux-carrying rotor component has first and second end faces (6, 7) and carries the cylindrical outer shell (4). A rotationally shaft section (8) is arranged in an inside space (9) of the rotor support and mounted coaxially with the rotor support. At least in the area of the first end face (6) the outer shell has first teeth which face toward the magnetic flux-carrying rotor component and a first tooth base between respective pairs of first teeth, and at least in the area of the second end face (7) the outer shell (4) has second teeth which face toward the magnetic flux-carrying rotor component and a second tooth base between respective pairs of second teeth. The invention also relates to an electric machine.

Abstract: A double-wall pipe for a transportation means which includes an outer pipe and an inner pipe extending therein. The outer pipe has two pipe segments which are formed like half-shells and are joined together to form the outer pipe along the longitudinal edges thereof. In this way, it is possible to make both the outer pipe and the inner pipe of metal, such that the wall thickness of the inner pipe can be relatively small.

Abstract: A double-wall pipe for a transportation means which includes an outer pipe and an inner pipe extending therein. The outer pipe has two pipe segments which are formed like half-shells and are joined together to form the outer pipe along the longitudinal edges thereof. In this way, it is possible to make both the outer pipe and the inner pipe of metal, such that the wall thickness of the inner pipe can be relatively small.