An accumulator defines an accumulator volume that can be placed into communication with a spring chamber of a gas spring. A working volume of the gas spring is the sum of the spring chamber volume and the accumulator volume. The accumulator can be configured so that the accumulator volume can be selectively increased or decreased as desired, thus modifying performance of the associated gas spring.

A gas cylinder includes: a base tube including a cavity; a spindle inserted into the cavity and performing a reciprocating motion in a longitudinal direction of the base tube; a cylinder mounted in the spindle and charged with gas; a piston dividing the cylinder into an upper chamber and a lower chamber; a valve portion sealing an upper portion of the cylinder and including a pipe holder having a cavity through which the gas is introduced; a flow prevention portion inserted into the spindle and having an inner surface contacting a surface of the spindle; and a spindle guide disposed between the base tube and the spindle and mounted to include at least a portion of the flow prevention portion.

A method for pressurizing and depressurizing a shock absorber of an aircraft. More specifically, it relates to a method in which an aircraft weight and ambient temperature are used to calculate a required pressurization level of a shock absorber. As such, the shock absorber may be pressurized to the correct level without applying an iterative approach, greatly reducing initialization time.

A method for pressurizing and depressurizing a shock absorber of an aircraft. More specifically, it relates to a method in which an aircraft weight and ambient temperature are used to calculate a required pressurization level of a shock absorber. As such, the shock absorber may be pressurized to the correct level without applying an iterative approach, greatly reducing initialization time.

The invention relates to a new type of tuned mass damper which is suitable in particular for damping oscillations of a low frequency, and can thus be used preferably as a construction damper when building or siting high, narrow structures, such as wind-turbine towers. The invention relates in particular to a pendulum oscillation damper having a first pendulum, to which the mass is attached, and a second pendulum, which is formed by a spring-like support device of a different design and is operated using a gas-air volume such that, with the aid thereof, the frequency of the oscillation system can be adapted and adjusted.

A supporting device including an installation assembly; a first supporting arm assembly having a longitudinal direction, a first end, and a second end; a switching bracket; a bearing unit pivotally connected to the switching bracket; and at least one gas spring is provided. The first end is pivotally connected to the installation assembly. The switching bracket is pivotally connected to the second end of the first supporting arm assembly. The gas spring is disposed in the first supporting arm assembly and is respectively connected to the switching bracket and the installation assembly to provide a supporting force. Each gas spring has a hollow tube, a piston rod, and a compression spring. The piston rod is slidably disposed through the hollow tube and has a head. The head may be varied between maximum and minimum protruding positions relative to the hollow tube. The compression spring is sleeved on the piston rod.

A multi-mode air shock is disclosed herein. The air shock includes an air spring having a primary air chamber, and a damper having an insertion end to telescope within the primary air chamber and a coupler to couple with a portion of a vehicle. An adjuster housing is fixedly coupled to an end of the air spring opposite of the damper, the adjuster housing having a secondary air chamber in communication with the primary air chamber and a mounting structure to couple with a different portion of the vehicle. There is a bulkhead with a valve to open or close the fluid communication between the primary air chamber and the secondary air chamber. The air shock also includes a tertiary air chamber in fluid communication with the secondary air chamber but not in fluid communication with the primary air chamber except via the secondary air chamber.

A method for pressurizing and depressurizing a shock absorber of an aircraft. More specifically, it relates to a method in which an aircraft weight and ambient temperature are used to calculate a required pressurization level of a shock absorber. As such, the shock absorber may be pressurized to the correct level without applying an iterative approach, greatly reducing initialization time.

A lockable piston-cylinder unit having a cylinder that is closed at both ends and filled with pressurized fluid and in which a piston that is sealed relative to the inner wall of the cylinder is displaceably guided. The piston divides the interior of the cylinder into a first working chamber and a second working chamber. A piston rod is arranged at the piston and is guided out of the cylinder 1 through one of the working chambers and through a guiding and sealing unit which closes the one end of the cylinder.

A drive arrangement for a motor vehicle flap including a gas pressure element, the gas pressure element has an outwardly sealed cylinder and a piston moveable in the cylinder interior along the cylinder axis and subdivides the cylinder interior into two sub-chambers, the gas pressure element has a first drive connection connected to the cylinder, and a second drive connection connected to the piston, the cylinder filled with a fluid and the piston has an overflow channel arrangement to create a balancing flow between the two sub-chambers to balance a pressure drop between the two sub-chambers. The piston is assigned a switchable valve arrangement which, depending on the pressure drop between the two sub-chambers, to create different through-flow states differing the cross section of the overflow channel arrangement. Upon exceeding a predetermined threshold for the pressure drop, the valve arrangement switches to change the cross section of the overflow channel arrangement.