An adjustable vibration damper for a vehicle may include an outer tube, an intermediate tube, and an inner tube arranged coaxially. A concentric compensation chamber between the outer tube and the intermediate tube may receive a hydraulic fluid and a gas. A piston rod may include a piston disposed movably in the inner tube and dividing an interior of the inner tube into first and second working chambers. The adjustable vibration damper may also include first and second damper valves arranged on an outer wall. The first working chamber may be fluidically connected to the compensation chamber by the first damper valve for adjustment of a pressure stage, and the second working chamber may be fluidically connected to the compensation chamber by the second damper valve for adjustment of a traction stage.

A back stop for a crane which eliminates operator's discomfort and adverse effects on surrounding environment due to generation of abnormal noise and enables greasing work to be facilitated. A back stop includes an outer casing having a base end portion turnably connected to a boom or a crane main body and an opening portion opened in the outer casing front end portion; an inner casing having a base end portion turnably connected to the crane main body or the boom and having a front end portion side slidably fitted into the outer case through the opening portion; and a greasing tube arranged in the outer casing or the inner casing. An inlet of the greasing tube is arranged outside of the outer casing or outside of the inner casing on the base end portion side on which the greasing tube is arranged. A discharge port of the greasing tube is attached to a front end portion of the inner casing.

An air spring assembly having pressure relief capability, where the air spring assembly includes a single air volume, or a multi-chamber air volume. When the air spring assembly is operating at a stiffer spring rate in combination with a setting to increase ground clearance, during certain road events, the air spring assembly is compressed, and the pressure in the air spring assembly increases. In order to not exceed the safe mechanical limits of the air spring assembly, the pressure is limited to a maximum value when full compression is achieved. The air spring assembly includes at least one valve, which is opened based on a cracking pressure, which is determined based on the mechanical limits of the air spring assembly. This facilitates the operation of the air spring assembly at settings to increase ground clearance of the vehicle, while allowing for pressure relief when the mechanical limit is reached.

A vibration damper may be used in connection with a motor vehicle. The vibration damper may include a hydraulic device for damping vibrations. The vibration damper may also include at least one shut-off valve connected fluidically to the hydraulic device at the vibration damper. The shut-off valve may be capable of being connected fluidically to at least one of a pump or a filling apparatus for filling the vibration damper with hydraulic fluid. The shut-off valve may comprise a valve housing with a first connector for the pump, a second connector for the filling apparatus, and a third connector for the hydraulic device.

A shock absorber has a main piston and a compression piston, connected by a compression piston housing. In stage 1, the shock absorber operates as a conventional monotube, with the damping force being generated only by the main piston. In stage 2, the compression piston travels into the compression housing, as the shock absorber still operates as a monotube damper. In stage 3, the compression piston is now significantly increasing its compression damping force by supplementing the main piston. The oil volume in the compression piston housing passes through the compression piston, causing an increase in compression damping force.

The present disclose describes a fluid isolator mount. The mount provides a long service life under high temperatures and large dynamic displacements. The mount utilizes metallic flexures and dynamic fluid chambers. The mount provides vibration isolation at selected frequencies while precluding damping effects.

A vibration damper comprising a working cylinder, which is subdivided by an axially movable piston on a piston rod into a first and a second working chamber filled with a damping medium is disclosed. The vibration damper has at least one compensating reservoir for receiving the damping medium displaced by the piston rod. There is a flow connection between the two working chambers, in which connection there is incorporated a pump assembly. The pump assembly has a fluctuation in the delivery volume with a constant power supply. At least one pulsation accumulator is arranged within the flow connection, wherein the volume and spring rate of the pulsation accumulator are matched to a frequency of a fluctuation of the delivery volume of the pump assembly.

Provided is a method for manufacturing a vibration damping device including sealing liquid (L) in a liquid chamber (11) of a vibration damping device main body (10) having the liquid chamber (11) in which the liquid (L) is sealed, and an injection port (12) through which the liquid (L) is injected into the liquid chamber (11). In a state where a nozzle (22) spouting the liquid (L) is thrust into the injection port (12) and an inside of a decompression container (21) having the vibration damping device main body (10) disposed therein is decompressed, the liquid (L) is injected into the liquid chamber (11) through the nozzle (22), and air inside the liquid chamber (11) is discharged through an air discharge port (14) which is formed in the vibration damping device main body (10) and communicates with the liquid chamber (11).

A shock absorber having an outer tube, an inner tube disposed coaxially in the outer tube and a piston reciprocally mounted in the inner tube. The interior of the inner tubes forms a working chamber for hydraulic oil while an annular replenishment chamber is formed between the inner and outer tubes. An improved base plate and base cage assembly facilitates fluid flow from the replenishment chamber to the working chamber during an extension cycle of the shock absorber.

A damping assembly for a structure includes a housing with a first fixed end and a second movable opposite end. A first translatable portion of the housing is slidably movable relative to an adjacent second section of the housing, the former being fixedly secured to a base when the structure is under load. A viscous damper disposed within the housing is engaged only after the first translatable section has first moved beyond an initial predetermined distance indicative of a higher amplitude loading event. At least one biasing feature prevents the viscous damper from operating until the first translatable section has first moved beyond the initial predetermined distance.