Abstract: The invention relates to an article comprising a main body (6, 7, 8) that consists of a polymer material having elastic properties, particularly an air spring bellows (2), a metal-rubber element or a vibration damper. In order for fire-retardant properties to be improved, the article is provided, partially or fully, with a cover (9) formed from at least one flat textile structure and/or at least one three-dimensional textile structure and/or at least one shrink film. The cover can be fire-retardant itself or can be equipped to be fire-retardant.

Abstract: The invention relates to an article comprising a main body (6, 7, 8) that consists of a polymer material having elastic properties, particularly an air spring bellows (2), a metal-rubber element or a vibration damper. In order for fire-retardant properties to be improved, the article is provided, partially or fully, with a cover (9) formed from at least one flat textile structure and/or at least one three-dimensional textile structure and/or at least one shrink film. The cover can be fire-retardant itself or can be equipped to be fire-retardant.

Abstract: The invention relates to a spring device, above all for the rail vehicle sector, particularly for absorbing shocks between a bogie and a superstructure. The spring device encompasses a combination of at least three springs, i.e.: a first spring comprising a pneumatic cushioning diaphragm that is made of an elastomeric material, is provided especially with an embedded strengthening support, particularly in the form of a criss-crossly stacked diaphragm, is fixed to a support plate and a pneumatic spring seat, and encloses an air chamber which has an elastic volume and is connected especially to at least one air supply; a second spring that is disposed between the pneumatic spring seat of the pneumatic cushioning diaphragm and a base and comprises above all a layered spring with at least one elastomer layer, and a third spring that is located above the support plate as an elastic top bearing and comprises especially a layered spring with at least one elastomer layer.