Abstract: The invention concerns a vehicle wheel, comprising a body of a plastics material and at least one adapter for fastening the body to a wheel mounting, the at least one adapter having at least one protuberance which engages in a recess in the body, or, if multiple adapters are used, at least one adapter is formed such that it engages in a recess of the body over its full surface area, the adapter being arranged in such a way that, after assembly of the body on the wheel mounting, the adapter is positioned between the body and the wheel mounting, or the adapter being arranged in such a way that the body is positioned between the wheel mounting and the adapter, so that the adapter lies on the outside of the body after assembly.

Abstract: The invention relates to a method of joining at least two components, in which a pin (3, 25) of a thermoplastic plastics material is heated, such that it becomes at least partially deformable, the pin (3, 25) of thermoplastic plastics material is guided through an opening (21) in the second component (5), the pin (3, 25) being joined to the first component (1) or guided beforehand as a separate component through a first opening (27) in the first component (1), and the heated pin (3, 25) of thermoplastic plastics material is pressed, such that the pin (3, 25) is applied against the wall of the opening (21) in the second component (5), the wall taking the form of an internal thread (19), or the pin (3, 25) is inserted into a sleeve (9) provided with an internal thread (13) and pressed, such that it is applied against the internal thread (13) of the sleeve (9), the pin (3, 25) being heated prior to being passed through the opening (21) in the second component (5) or after insertion into the opening (21) in the s

Abstract: The invention relates to a method of fabricating a bipolar plate for fuel cell stacks, wherein the bipolar plate includes a circumferential frame made of an electrically non-conductive material and further includes an inner bipolar plate region which is enclosed by the frame, is made of the electrically non-conductive material and comprises channels for gases and, if required, for coolants, said method comprising the following procedural steps: A) Inserting an electrically conductive fabric into a tool for fabricating the bipolar plate, B) Introducing the electrically non-conductive material into the tool in order to form the frame and the inner bipolar plate region (3), the electrically non-conductive material extending through the fabric, C) Removing a molded bipolar plate from the tool, and D) Bending back the fabric on both sides which extends beyond the inner bipolar plate region so as to cause the fabric to cover the inner bipolar plate region made of the non-conductive material.

Abstract: The invention relates to a fuel cell module (21, 22) for PEM fuel cell stacks comprising a bipolar plate (2) and a membrane-electrode assembly (MEA) (3), wherein the bipolar plate (2) includes a circumferential frame (5) made of an electrically nonconductive material and further includes an electrically conductive inner bipolar plate region (6) which is enclosed by the frame (5) and comprises channels for gases and, if required, for coolants, and wherein the MEA (3), which comprises a polymer-electrolyte membrane is fixed on the anode side to the frame (5) of the bipolar plate (2) by means of a weld or by a circumferential elastomer seal partially overlapping the MEA (3).

Abstract: The invention relates to a method of fabricating a bipolar plate (1) for fuel cell stacks, wherein the bipolar plate (1) includes a circumferential frame (2) made of an electrically non-conductive material and further includes an inner bipolar plate region (3) which is enclosed by the frame (2), is made of the electrically non-conductive material and comprises channels (5) for gases and, if required, for coolants, said method comprising the following procedural steps:

Abstract: Described are a bipolar plate for PEM fuel cells comprising a core metal layer and two nonconductive plastic layers bilaterally overlying the metal layer and enclosing it, which form the surfaces of the bipolar plates, wherein the metal layer has one or more electroconductive connections to both surfaces and the plastic layers are equipped with superficial gas transport channels, and a bipolar plate for PEM fuel cells made of nonconductive plastic which is equipped on both surfaces with gas transport channels and which, except for its edge region, is metal coated, the bilateral metal coatings being electroconductively connected through the plastic via one or more metal contacting means.

Abstract: A process for producing a composite constructional element from a basic body made of plastic which is provided with ribs and is partially or completely connected to a reinforcing element made of metal or reinforced plastic. In this process, the connection of the basic body and reinforcing element to form the composite constructional element for the transfer of shearing, torsional, flexural and tensile/compressive stresses takes place at a subsequent time in a separate work step.