Abstract: The invention relates to an air spring (1a) with an elastic air spring bellows (3a), wherein the air spring bellows is tightly connected to an air spring cover (2) at its first open end and to an air spring piston (6a) at its second open end and thereby at least partially encloses a working chamber (4) filled with compressed air, wherein the air spring bellows forms a rolling fold (5) which can roll on the air spring piston (6a), wherein the air spring bellows has a fastening bead (7a) at least at its one end which faces the air spring piston, wherein a radially inwardly extending shoulder region (10a) is formed at the bellows-side axial end of the air spring piston (6a), wherein a conical sealing seat (9a) is formed radially on the inside at the shoulder region, wherein a radially inner sealing face (13a) of the fastening bead bears against the conical sealing seat of the air spring piston so as to seal the working chamber, and wherein the underside (14a) of the fastening bead pointing towards the air spring

Abstract: A roll-off piston is made of plastic for an air spring rolling-lobe flexible member. The roll-off piston and the air spring rolling-lobe flexible member are arranged between a sprung mass and an unsprung mass. The roll-off piston includes a first piston part; a second piston part connected to the first piston part; and, the first and second piston parts being made of a layered composite material of alternating layers of plastic and elastomeric material.

Abstract: An air spring for commercial vehicles includes a rolling-lobe flexible member which is made of an elastomeric material and which at one end thereof is fastened to a first attachment part and at the other end thereof is fastened to a second attachment part in the form of a roll-off piston. The ends of the rolling-lobe flexible member each have a fastening bead which is reinforced in each case by a bead core. At least one of the two bead cores consists of plastic material. In order to achieve greater strength of the fastening bead, the bead core or the bead cores include a multiply-wound, flat profile strip made of glass-fiber-reinforced plastic material.

Abstract: A roll-off piston is made of plastic for an air spring rolling-lobe flexible member. The roll-off piston and the air spring rolling-lobe flexible member are arranged between a sprung mass and an unsprung mass. The roll-off piston includes a first piston part; a second piston part connected to the first piston part; and, the first and second piston parts being made of a layered composite material of alternating layers of plastic and elastomeric material.

Abstract: An air spring for commercial vehicles includes a rolling-lobe flexible member which is made of an elastomeric material and which at one end thereof is fastened to a first attachment part and at the other end thereof is fastened to a second attachment part in the form of a roll-off piston. The ends of the rolling-lobe flexible member each have a fastening bead which is reinforced in each case by a bead core. At least one of the two bead cores consists of plastic material. In order to achieve greater strength of the fastening bead, the bead core or the bead cores include a multiply-wound, flat profile strand made of glass-fiber-reinforced plastic material.

Abstract: The invention relates to an air spring damper module including a shock absorber (1) and a roll-off piston (5) which is pushed over the upper end of the shock absorber with an opening in the piston base with the piston base being supported on the outer tube (16) of the shock absorber via an annular flange (2). A pipe (15) is centrally fixed to the inner surface of the piston cover (6) and engages around the shock absorber (1) in the mounted state and also is supported on the annular flange (2) of the shock absorber (1). The inner surface of the piston cover and the upper closure of the shock absorber are spaced apart by a gap.

Abstract: The invention relates to an air spring damper module including a shock absorber (1) and a roll-off piston (5) which is pushed over the upper end of the shock absorber with an opening in the piston base with the piston base being supported on the outer tube (16) of the shock absorber via an annular flange (2). A pipe (15) is centrally fixed to the inner surface of the piston cover (6) and engages around the shock absorber (1) in the mounted state and also is supported on the annular flange (2) of the shock absorber (1). The inner surface of the piston cover and the upper closure of the shock absorber are spaced apart by a gap.

Abstract: In order to rapidly and inexpensively deliver information regarding the load status of a motor vehicle, in particular, a utility vehicle with at least one axle that is suspended on pneumatic springs, there is arranged a sensor for measuring the bellows pressure and one additional sensor for measuring the spring travel on each of the pneumatic springs used in the wheel suspensions of the motor vehicle, and to additionally process the pressure and the spring travel in an electronic control unit. In this case, the spring forces preferably are calculated and displayed first, whereafter the wheel forces and ulitmately the position of the center of gravity, as well as the total weight and/or the weight of the net load, are calculated and displayed. The information regarding the load status preferably is also utilized as an input quantity for other safety systems, e.g., for lowering a lift axle, for issuing a warning and/or for throttling the speed in accordance with the respective requirements.