A vibration damper may comprise a damper tube filled at least partially with damping liquid. A piston rod is movable to and fro in the damper tube, and a working piston is movable with the piston rod. The working piston may divide an interior space of the damper tube into a piston rod-side working space and a working space distal the piston rod. A piston rod attachment may include an attachment element, a bracing element, and a wedge element. On a side that faces away from the working piston, the piston rod may have a wedge element cut-out for partially receiving the wedge element in a braced state. The attachment element may be connected to the bracing element such that the attachment element braces the bracing element with respect to the piston rod via the wedge element arranged in the wedge element cut-out.

A system for damping vibration of a tower structure at a selected one or more natural frequencies of the tower structure. The system includes a tank assembly with one or more tanks, and a fluid positioned in the tank to a preselected depth above a floor. The tank includes wall(s) defining an average travelling distance of a wave through the fluid initiated by the vibration of the tower structure at the natural frequency. The system includes one or more inserts located on the floor in the tank for damping movement of the fluid. The preselected depth and the average travelling distance are selected so that the fluid is movable at the selected natural frequency and out of phase with the vibration of the tower structure, to dampen the vibration of the tower structure at the selected natural frequency.

A wind turbine is provided, including a container, a fluid which is arranged inside the container, and a damping body which is arranged inside the container, which is immersed in the fluid, and which is configured to move inside the container, wherein the fluid and the damping body are configured to damp oscillations of the wind turbine. A damper system is provided that on the one hand the fluid damps, e.g. by sloshing, and on the other hand the damping body damps by moving at least partially through the fluid.

A shock absorber includes a hard side damping element that imparts a resistance to a flow of liquid moving between an extension side chamber and a compression side chamber, a solenoid valve configured to change an aperture area of a bypass passage that bypasses the hard side damping element and communicates with the extension side chamber and the compression side chamber, a soft side damping element provided in series with the solenoid valve in the bypass passage, and a tank connected to the compression side chamber. The hard side damping element includes an orifice and leaf valves provided in parallel with the orifice. The soft side damping element includes an orifice having a larger aperture area than the orifice.

A shock absorbing system for impact energy dissipation employs removable unitary cells of compressible members in communication with a reservoir and containing a first working fluid. Resilient structural members may be placed intermediate the compressible members to deform responsive to compression to provide both energy dissipation and resilient recovery of the compression cylinders to their uncompressed state.

Solar tracker systems include a torque tube, a column supporting the torque tube, a solar panel connected to the torque tube, and a damper assembly. The damper assembly includes a first end pivotably connected to the torque tube and a second end pivotably connected to the column. The damper assembly further includes an outer shell, a piston within and moveable relative to the outer shell, a first chamber wall and a second chamber wall within the outer shell at least partially defining a chamber, and a valve within the chamber. The valve includes a first axial end defining a slot and is biased to a first position within the chamber in which the first axial end is spaced from the first chamber wall. The valve is moveable within the chamber from the first position to a second position to passively change a flow resistance of the damper assembly.

A system for damping vibration of a tower structure at a selected one or more natural frequencies of the tower structure. The system includes a tank assembly with one or more tanks, and a fluid positioned in the tank to a preselected depth above a floor. The tank includes wall(s) defining an average travelling distance of a wave through the fluid initiated by the vibration of the tower structure at the natural frequency. The system includes one or more inserts located on the floor in the tank for damping movement of the fluid. The preselected depth and the average travelling distance are selected so that the fluid is movable at the selected natural frequency and out of phase with the vibration of the tower structure, to dampen the vibration of the tower structure at the selected natural frequency.

A shock absorber pressure tube defining a working chamber is provided. A piston assembly coupled to a piston rod is slidably disposed in the pressure tube and divides the working chamber into upper and lower working chambers. A reserve tube surrounds the pressure tube to define a reserve chamber. A base valve assembly, position at one end of the pressure tube, controls fluid flow between the lower working chamber and the reserve chamber. The reserve tube comprises first and second open shells that are joined together at longitudinal seams to create a substantially cylindrical shape. The first and second open shells may be made from patchwork blanks, tailor welded blanks, tailor rolled blanks, or tailor heat treated blanks to give different portions of the first and second open shells different thicknesses, strengths, properties, or characteristics.

A shock absorber pressure tube defining a working chamber is provided. A piston assembly coupled to a piston rod is slidably disposed in the pressure tube and divides the working chamber into upper and lower working chambers. A reserve tube surrounds the pressure tube to define a reserve chamber. A base valve assembly, position at one end of the pressure tube, controls fluid flow between the lower working chamber and the reserve chamber. The reserve tube comprises first and second open shells that are joined together at longitudinal seams to create a substantially cylindrical shape. The first and second open shells may be made from patchwork blanks, tailor welded blanks, tailor rolled blanks, or tailor heat treated blanks to give different portions of the first and second open shells different thicknesses, strengths, properties, or characteristics.

A solenoid includes a first fixed iron core and a second fixed iron core located on one axial end side and the other axial end side of a coil, a first movable member and a second movable member located between those fixed iron cores and configured to be attracted to the first fixed iron core and the second fixed iron core, respectively, by energization of the coil, a spring configured to bias the first movable member toward the second fixed iron core, and a first regulating portion made from a non-magnetic material, provided integrally with the first movable member or the second movable member, and configured to regulate movement of the first movable member toward the second fixed iron core with respect to the second movable member.