Abstract: A piston-cylinder unit for a hydropneumatic suspension system of a vehicle having a fluid-filled cylinder in which a piston having damping valves and connected to a piston rod is axially movable. The piston rod runs axially in a piston rod guide at the piston-rod exit of the cylinder and is sealed toward the outside by means of a piston rod seal. A spring surrounding the piston rod is in mounted between a first support part attached to the cylinder and a second support part attached to either the piston rod or a vehicle-fixed part. The spring, which interacts with an axially adjustable support part, can be lifted off one of the support parts. During compression of the piston-cylinder unit, the first and second support parts begin compression of the spring at the functional point of the compression. The functional point is adjustable in a predetermined position range by an adjustment device.

Abstract: The invention relates to a connection device for a liquid or gaseous medium through an outer wall of a cylinder, whereby a connection piece interacts with a bore in the outer wall of the cylinder and with a centering part that is inserted into the bore. The connection piece has a contact surface matched to the cylinder surface and also has a corresponding sealing surface. The connection has an accommodating cavity for receiving an insert, which includes a sealing surface matched to the cylinder surface, The correct installation position of the insert in the accommodating cavity is ensured by an orientation aid.

Abstract: A piston-cylinder unit includes a cylinder in which a piston rod is located so that the piston rod can move axially. A first connection mechanism is connected to the cylinder, and a second connection mechanism is connected to the piston rod. A positioning cylinder, with a pressure medium connection, is effectively connected to one of the first and second connection mechanisms. The distance between the first and second connection mechanisms can be set by the addition or discharge of pressure medium to or from the positioning cylinder. The positioning cylinder is located in series with the cylinder, and the piston rod forms a guide path or track for the positioning cylinder.

Abstract: A shock absorber for a motor vehicle has a single-tube construction with an adjustable damping force. The shock absorber includes a cylinder tube and a piston rod guide inside which a piston rod with a piston is located so that the piston can move axially. The piston divides the cylinder tube into two work chambers. A container tube encloses the cylinder tube, at least in segments. Between the cylinder tube and the container tube at least one hydraulic connection, extending from one of the work chambers via an overflow orifice to a damping force adjustment valve located outside the container tube, is formed. A cylinder tube guide centers the cylinder tube with respect to the container tube. The damping force adjustment valve has two connection openings, one of which openings is separated from the other by a wall. The damping force adjustment valve is connected to the hydraulic connection, so that the container tube extends over the entire length of the hydraulic connection to the piston rod guide.

Abstract: A shock absorber or vibration damper with a securing element which has a ring area for the axial fixing and securing of ring-shaped components, in particular for securing guide bushings and gaskets for the piston rod of a hydraulic vibration damper. The securing element is characterized by a plurality of projections which project axially to locate and fix the position of a cylindrical body, whereby the projections extend from the ring area, and the projections are bent out of the securing element. The cylindrical body secured by the projections can possibly be the inner tube of a two-tube vibration damper or a decompression stop spring. The invention teaches that the securing element can be used to perform multiple functions in part by securing multiple components.

Abstract: A shock absorber with a pneumatic spring, comprising an outer suspension tube and an inner suspension tube of a suspension unit, whereby elastic roller bellows are connected to the outer and inner suspension tubes, forming a spring chamber. The roller bellows are crimped on one end to the inner suspension tube. When the shock absorber with a pneumatic spring is fully assembled, a safety device is located on the pneumatic spring which centers the outer suspension tube in relation to the inner suspension tube, so that contact between the crimped part and the adjacent roller bellows is prevented, thereby preventing damage to the roller bellows.

Abstract: A vibration damper between a vehicle body and/or a vehicle axle, comprising a cylinder in which a piston rod is guided so that it can move axially, whereby the piston rod is connected by way of a first connection to a bearing, and the cylinder is connected by way of an additional connection to a corresponding bearing, whereby the vibration damper runs through at least one bearing and has a self-locking closure by way of at least one radially movable flexible tab. The at least one radially movable flexible tab, by way of its end surface, forms a support for the vibration damper at the bearing in question for one direction, whereby the flexible tab(s) is/are accessible in the release direction, and an elastic clamping body is provided for the opposite direction, so that the vibration damper is restrained by way of the end surface and the clamping body.

Abstract: Air suspension system with a compressed air container of an air suspension system for a motor vehicle with a vehicle frame and a vehicle body, comprising a number of elastic air springs which are connected to the reservoir, whereby the air springs and the reservoir are to be considered as compressed air containers, characterized by the fact that at least one compressed air container is located inside a cavity formed by at least one vehicle part which is independent of the air suspension system strictly speaking.

Abstract: A hydraulic rotary actuator within a stabilizer system divided into two parts is taught. A first stabilizer part is non-rotationally connected to a rotary actuator vane assembly, and a second stabilizer part is non-rotationally connected to a rotary actuator housing. The rotary actuator housing has hydraulic connections for hydraulic lines which form a flow connection to a hydraulic system. The two stabilizer parts can be rotated with respect to one another by the rotary actuator. The segments of the hydraulic lines which are connected to the rotary actuator, and are subject to possible deformation, are located in a plane which lies essentially perpendicular to the axis of rotation of the rotary actuator.

Abstract: A stabilizer system with a rotary actuator has a first stabilizer part which is non-rotationally connected to a rotary actuator vane assembly. A second stabilizer part is non-rotationally connected to a rotary actuator housing. The rotary actuator housing has hydraulic connections for hydraulic lines which form a flow connection to a hydraulic system, whereby the two stabilizer parts can be rotated with respect to one another by way of the rotary actuator. The segments of the hydraulic lines which are connected to the rotary actuator and are subject to possible deformation are located in a plane which lies essentially perpendicular to the axis of rotation of the rotary actuator. A line fastener can be optionally fastened to the rotary actuator housing or to the stabilizer part which is stationary relative to the rotary actuator housing.

Abstract: Rotary actuator, including a cylinder and motor shaft, as well as end caps which define a work chamber, whereby a number of ribs on the inside surface of the cylinder and the same number of vanes on the motor shaft divide the working area into work chambers which are alternately supplied with hydraulic medium, and seal units inside grooves in the ribs and vanes which hydraulically separate the work chambers from one another, characterized by the fact that there is a space between the seals and the side walls of the grooves which is offset by an additional volume.

Abstract: A double tube vibration damper comprises a pressure tube and a container tube. Two working chambers are defined by the piston within the pressure tube. A compensation space is provided between the pressure tube and the container tube. The pressure tube extends axially between a bottom wall of the container tube and a piston rod guide secured to the container tube. A spring is in series with the pressure tube between the bottom wall and the piston rod guide. This spring compensates for different length variations of the pressure tube and the container tube. This spring is always under compressional stress throughout the operational range of temperature.

Abstract: In a double tube vibration damper a bottom valve body is provided adjacent an end portion of a pressure tube which end portion is remote from the entrance of the piston rod into the pressure tube. The bottom valve body is positioned by a positioning sleeve which is in frictional engagement with an internal circumferential surface of the pressure tube.

Abstract: According to an illustrative example of the invention a connecting pipe is provided with a cover face engaging an external cylindrical face of a cylinder. This cylinder includes a fluid chamber and is provided with a bore through the cylindrical face. The cover face is provided with a three-dimensionally formed groove surrounding the bore. A sealing ring is accomodated with the groove. The cover face is pressed against the cylindrical face via a clamping band so that the sealing ring is under prestress.

Abstract: In a spring strut a piston rod is guided through a sealing ring which is accommodated within a groove. This groove has a localization line which has varying height above a reference plane axially fixed and orthogonal with respect to the axis of the cylinder of the spring strut. The groove is confined by two groove confining members which are shaped such that they can be manufactured by a non-cutting shaping process, such as injection-moulding or sintering.