A damper housing disposed on a center axis includes an extended mains section and a narrowed end section. The narrowed end section has a second predetermined wall thickness less than the first predetermined wall thickness of the extended main section. An intermediate conical section, connecting the narrowed end section and the extended main section, has an intermediate conical section wall thickness equal to the second predetermined wall thickness at an internal inclination angle relative to the center axis. A method for manufacturing the damper housing using a preformed tube, a first broaching die, a calibrating mandrel, and a swaging die is performed by compressing the preformed tube between the first broaching die and the narrowed head of the calibrating mandrel and compressing the preformed tube between the swaging die and the intermediary section of the calibrating mandrel to form the narrowed end section and the intermediate conical section, respectively.

A suspension strut including an air spring unit and a damper unit that are aligned on a common axis is disclosed. The air spring unit includes a rolling tube having a flared terminal end that extends over a damper tube associated with the damper unit. The damper tube has a circumferential groove formed in an outer diameter of the damper tube. A retaining ring has a greater outer diameter than the outer diameter of the damper tube and is positioned in the circumferential groove. A base has an inner diameter less than the outer diameter of the retaining ring, and an outer diameter smaller than the predetermined diameter of the flared free end, and is supported on the retaining ring. A torsion element fits around the damper tube and within the flared free end.

A suspension strut including an air spring unit and a damper unit that are aligned on a common axis is disclosed. The air spring unit includes a rolling tube having a flared terminal end that extends over a damper tube associated with the damper unit. The damper tube has a circumferential groove formed in an outer diameter of the damper tube. A retaining ring has a greater outer diameter than the outer diameter of the damper tube and is positioned in the circumferential groove. A base has an inner diameter less than the outer diameter of the retaining ring, and an outer diameter smaller than the predetermined diameter of the flared free end, and is supported on the retaining ring. A torsion element fits around the damper tube and within the flared free end.

A gas spring and gas damper assembly includes a gas spring assembly and a gas damper assembly. The gas spring assembly includes a first wall portion, a second wall portion disposed in spaced relation to the first wall portion, and a flexible wall section connected therebetween. The gas damper assembly includes a third wall portion disposed in longitudinally-spaced relation to the first wall portion, and a second flexible wall section connected between the second wall portion and the third wall portion. A fourth wall portion is disposed between the first and second wall sections to define two pressurized gas chambers. A damper rod connects at least the first and third wall portions. Methods are also included.

A gas spring and gas damper assembly includes a gas spring assembly and a gas damper assembly. The gas spring assembly includes a first wall portion, a second wall portion disposed in spaced relation to the first wall portion, and a flexible wall section connected therebetween. The gas damper assembly includes a third wall portion disposed in longitudinally-spaced relation to the first wall portion, and a second flexible wall section connected between the second wall portion and the third wall portion. A fourth wall portion is disposed between the first and second wall sections to define two pressurized gas chambers. A damper rod connects at least the first and third wall portions. Methods are also included.

A damper system for a vehicle is provided that includes a pressurized gas damper, electromagnetic actuator, and pressurized gas spring. The pressurized gas damper includes first and second working chambers that are fluidly connected by a flow control orifice. The electromagnetic actuator includes a stator assembly with a stator cavity and a magnetic rotor that is slidingly received in the stator cavity. The magnetic rotor is fixed to a damper tube that houses the second working chamber. The stator cavity and an end of the damper tube cooperate to define the first working chamber. The pressurized gas spring includes a bellows chamber that extends annularly about the damper tube. The damper tube includes an opening between the second working chamber and the bellows chamber.

A damper system for a vehicle is provided that includes a pressurized gas damper, electromagnetic actuator, and pressurized gas spring. The pressurized gas damper includes first and second working chambers that are fluidly connected by a flow control orifice. The electromagnetic actuator includes a stator assembly with a stator cavity and a magnetic rotor that is slidingly received in the stator cavity. The magnetic rotor is fixed to a damper tube that houses the second working chamber. The stator cavity and an end of the damper tube cooperate to define the first working chamber. The pressurized gas spring includes a bellows chamber that extends annularly about the damper tube. The damper tube includes an opening between the second working chamber and the bellows chamber.

Air spring strut for a motor vehicle comprising an air spring with a shock damper for the spring-cushioning and damping of oscillations of a motor vehicle chassis, wherein the air spring comprises an air spring cover and a rolling piston, wherein a rolling bellows of elastomer material is clamped in an airtight manner between the air spring cover and the rolling piston. The air spring cover comprises a damper bearing receptacle in which a damper bearing of the shock damper is arranged, and the air spring cover comprises a clamping base to which a first end of the rolling bellows is attached. At least the damper bearing receptacle of the air spring cover is produced completely from a plastic material, and the plastic material is a thermoplastic.

Air spring strut for a motor vehicle comprising an air spring with a shock damper for the spring-cushioning and damping of oscillations of a motor vehicle chassis, wherein the air spring comprises an air spring cover and a rolling piston, wherein a rolling bellows of elastomer material is clamped in an airtight manner between the air spring cover and the rolling piston. The air spring cover comprises a damper bearing receptacle in which a damper bearing of the shock damper is arranged, and the air spring cover comprises a clamping base to which a first end of the rolling bellows is attached. At least the damper bearing receptacle of the air spring cover is produced completely from a plastic material, and the plastic material is a thermoplastic.

A device for fastening an air spring to a body portion of a motor vehicle, at least comprising an air spring cover, wherein the air spring cover comprises at least one fastening means, by means of which the air spring can be connected to the body portion of the motor vehicle, wherein, for attachment of the air spring, the fastening means is plugged through an opening of the body portion and is fixed to said body portion in a force-fitting manner by a securing element, wherein a first and a second plastics part are provided for acoustic decoupling of the air spring, wherein the first plastics part, is clamped between the body portion and the securing element, and the second plastics part is provided so as to be positioned below the body portion.