Abstract: A tensioning device for applying a tensioning force to a component has a cylinder housing having a hydraulic medium filled axial cylinder, a piston rod guided in the cylinder recess telescoping in a longitudinal axis direction, and displaceable back and forth, projecting out of the cylinder housing at one end, a piston guided in an axial piston rod recess, and displaceable, back and forth, by a limited amount, in the longitudinal axis direction, from a moved-in position to a moved-out position, and a spring element connected with the piston driving the piston in an outward piston movement direction parallel to the longitudinal axis. Force is applied to the piston by the spring element and by the hydraulic medium, so that inward movement of the piston rod into the cylinder housing (8), in the inward piston rod movement direction (77), brings about inward movement of the piston into the piston rod.

Abstract: The invention relates to a tensioning device (1) for applying a tensioning force (FX) to a component (2), particularly to a press-down roller or deflection roller (3; 4), having a longitudinal axis (11), a cylinder housing (8) having an axial cylinder recess (20) filled with a hydraulic medium, a piston rod (9) guided in the cylinder recess (20) telescoping in the direction of the longitudinal axis (11), so as to be displaceable back and forth, projecting out of the cylinder housing (8) at one end, wherein the piston rod (9) has an axial rod recess (36), a piston (10) guided in the rod recess (36), so as to be displaceable, back and forth, by a limited amount, in the direction of the longitudinal axis (11), from a moved-in position to a moved-out position, a spring element with which the piston (10) stands in connection, so that it can be driven in an outward piston movement direction (66) parallel to the longitudinal axis (11), wherein the piston has force applied to it on one side by the spring element and

Abstract: The invention relates to a hydro-pneumatic piston accumulator (1), particularly for vehicle suspension systems, consisting of an accumulator housing (2) and a separating piston (6), which is disposed free-floating inside the accumulator housing in a displaceable manner in the direction of the movement axis (4). The separating piston separates an accumulator area (8) for a hydraulic medium from a pressure area (10) that is filled or is to be filled with a compressible medium, and is guided with an interior guide opening (30) on an elongated guide element (32), which is axially fixed within the accumulator housing (2).

Abstract: A suspension system (1) for a motor vehicle having a telescopic spring cylinder (2), having two spring stages (A, B), namely one main cylinder (8) as a first spring stage (A) and an auxiliary cylinder (10) as a second spring stage (B). An auxiliary piston (26) with an auxiliary piston rod (28) is displaced in the auxiliary cylinder (10). Inside the auxiliary cylinder (10), the auxiliary piston (26) is acted upon by a spring pressure (p2) for decompression, which is generated by a pneumatic pressure medium (PM) inside the auxiliary cylinder (10). The auxiliary piston (26) is indirectly acted upon by the spring pressure (p2) via an hydraulic medium (HM) inside the auxiliary cylinder (10). Peripheral seals (30, 38) arranged between the auxiliary cylinder (10) and the auxiliary piston (26), and the auxiliary piston rod (28) are separated from the pneumatic pressure medium (PM) via the hydraulic medium (HM).

Abstract: This invention relates to a hydropneumatic piston reservoir (1) with a primary cylinder (2) in which runs a separating piston (12) with free mobility, with the separating piston (12) sealed off circumferentially, with the separating piston (12) inside the primary cylinder (2) separating two pressure chambers (16, 18) from one another. The separating piston (12) has an axial separating piston rod (20) at one end that is sealed off circumferentially from the primary cylinder (2) and is guided as a plunger (22) in a connected secondary cylinder (4) and is subjected to or can be subjected to a pressure medium. The plunger (22) at its free end away from the primary cylinder (2) has a bumper element (24) with a bumper area (28) projecting radially over the outer circumference (26) of the plunger (22).

Abstract: The invention relates to a suspension arrangement (1) for—loading-bearing and resilient wheel support in a motor vehicle, having at least one spring cylinder (2) with a piston (6) which is guided in a cylinder (4) such that it can be moved relative to the latter and which, on one side, has a piston rod (8) guided out of the cylinder (4) in the outward direction. The piston (6) separates, within the cylinder (4), a cylindrical working chamber (12) from an annular chamber (14), which encloses the piston rod (8). On the side of the working chamber (12), in order to generate a load-bearing spring force (F), the piston (6) acts counter to a working pressure (pA) of an elastically compressible, in particular pneumatic spring medium (FM). The piston rod (8) is telescopically variable in length via an additional spring cylinder (16), the additional spring cylinder (16) being subjected at least to a counterpressure (pG; pG1, pG2) of an elastically compressible, in particular pneumatic opposing spring medium (GM).

Abstract: The invention relates to a suspension and damping device (1; 100; 201) for the load-bearing and spring-loaded wheel support and for the damping of suspension movements in a motor vehicle. The device comprises at least one spring cylinder (2; 114; 222) having a piston (6; 118; 226) that is guided in a cylinder (4; 116; 224) such that it can move relative thereto. This piston acts against an elastically compressible spring medium (FM) in order to generate a load-bearing supporting spring force (F), wherein for damping purposes a separate circuit of a hydraulic damping medium (DM) is provided and the circuit is independent of the spring medium (FM). The piston (6; 118; 226) inside the cylinder (4; 116; 224) separates two working chambers (10, 12; 120, 122; 228, 230) from each other, wherein the first working chamber (10; 120; 228) is associated with the spring medium (FM) and the second working chamber (12; 122; 230) is associated with the damping medium (DM).

Abstract: The present invention relates to a suspension device for the load-bearing and resilient support of a wheel in a motor vehicle. The device comprises at least one spring cylinder with a piston which is guided in a manner moveable relative to it in a pressure cylinder. A driving device converts pivoting movement of a wheel oscillating-crank supporting arm, which movement oscillates about an oscillating-crank axis into the relative movements between the pressure cylinder and the piston. The piston acts counter to an elastically compressible spring medium in order to produce a load-bearing supporting spring force. The driving device is designed as a gearwheel mechanism.

Abstract: The present invention relates to a suspension device for the load-bearing and resilient support of a wheel in a motor vehicle. The device comprises at least one spring cylinder with a piston which is guided in a manner moveable relative to it in a pressure cylinder. A driving device converts pivoting movement of a wheel oscillating-crank supporting arm, which movement oscillates about an oscillating-crank axis into the relative movements between the pressure cylinder and the piston. The piston acts counter to an elastically compressible spring medium in order to produce a load-bearing supporting spring force. The driving device is designed as a gearwheel mechanism.

Abstract: The present invention relates to a suspension device for the load-bearing and resilient support of a wheel in a motor vehicle, comprising at least one spring cylinder with a piston, which is guided in a manner moveable relative to it in a pressure cylinder, and comprising a driving device for converting pivoting movements of a wheel oscillating-crank supporting arm, which movements oscillate about an oscillating-crank axis, into the relative movements between the pressure cylinder and piston, the piston acting counter to an elastically compressible spring medium (FM) in order to produce a load-bearing supporting spring force (F), the driving device being designed as a gearwheel mechanism.

Abstract: A suspension system with at least one hydraulic spring strut. At least a portion of the hydraulic medium is displaced into a hydropneumatic spring reservoir during the compression movement of the spring strut, and that portion of the hydraulic medium flows back into the spring strut during the expansion movement. At least the expansion flow is conveyed through the flow path of a damping valve and damped due to the fact that the flow path is continuously closed and reopened in an alternating fashion by means of a valve element once a expansion flow is present. The valve element is bypassed via a bypass which is constructed in such a way that a pressure compensation between the sections of the flow path arranged on both sides of the valve element is ensured in the static condition in which essentially no flow is present; and that the bypass essentially loses this pressure compensation function in the dynamic condition in which a flow is present.

Abstract: The present invention pertains to a suspension system, in particular, for wheel support of motor vehicles with at least one shock absorber leg consisting of a cylinder and a piston moving in this cylinder for contraction and extension, and actuated by a hydraulic medium, in particular, an oil. Preferably the suspension system is of the hydropneumatic design, whereby the hydraulic medium flows back and forth upon retraction and extension via a hydraulic connection between the shock absorber leg and at least one hydropneumatic shock absorber reservoir containing a compressible medium so that the reservoir generates a hydraulic pressure by compression of the compressible medium that causes a spring force in the shock absorber leg due to the pressure applied to the piston.