An adjustable shock absorber system includes: a coil over shock absorber with a spring and a lockable adjustment ring; a protective cover assembly, optionally including top and bottom cover portions; a shock adjuster tool with a lever arm and a tool grip portion, including a band assembly, and a tool attachment assembly, including a connector member and a tool member; such that the tool grip portion detachably connects to the peripheral mounting surface of the lockable adjustment ring; whereby the shock adjuster tool can be used to adjust a preload of the coil-over shock absorber. Alternatively, an adjustable shock absorber system includes: a coil-over shock absorber with a spring and an adjustment ring; an adjustment ring assembly, which detachably interlocks with the adjustment ring; and a shock adjuster tool with a lever arm and a tool grip portion, which detachably connects with the adjustment ring assembly.

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 hydraulic shock absorber includes a piston, a damper tube, a suspension spring, a plunger, a jack chamber, a pump case, a pump piston, a screw shaft, and a drive unit. Both end surfaces of the pump piston in a reciprocating direction are a first end surface demarcating the pump chamber, and a second end surface demarcating the gas chamber, the second end surface having a screw hole into which the screw shaft is screwed. The pump piston includes a space portion between a bottom plate defining the first end surface and the screw hole. The screw shaft has a through-hole connecting the gas chamber with the space portion.

A hydraulic shock absorber includes a piston, a damper tube, a suspension spring, a plunger, a jack chamber, a pump case, a pump piston, a screw shaft, and a drive unit. Both end surfaces of the pump piston in a reciprocating direction are a first end surface demarcating the pump chamber, and a second end surface demarcating the gas chamber, the second end surface having a screw hole into which the screw shaft is screwed. The pump piston includes a space portion between a bottom plate defining the first end surface and the screw hole. The screw shaft has a through-hole connecting the gas chamber with the space portion.

A shock absorber includes a cylinder that includes a cylinder body defining a disposing space, a piston movably disposed in the disposing space and dividing the disposing space into a liquid space and an air space, and an electronic control device disposed in the air space and dividing the air space into a first chamber space and a second chamber space. The electronic control device has an electromagnetic unit and a rod unit that includes a blocking member, and that is controllable by the electromagnetic unit to convert between a blocking state and an unblocking state, in which the blocking member respectively prevents and permits fluid communication between the first chamber space and the second chamber space.

A shock absorber includes a cylinder that includes a cylinder body defining a disposing space, a piston movably disposed in the disposing space and dividing the disposing space into a liquid space and an air space, and an electronic control device disposed in the air space and dividing the air space into a first chamber space and a second chamber space. The electronic control device has an electromagnetic unit and a rod unit that includes a blocking member, and that is controllable by the electromagnetic unit to convert between a blocking state and an unblocking state, in which the blocking member respectively prevents and permits fluid communication between the first chamber space and the second chamber space.

A first hydraulic damper includes one end portion attached to a first attachment position of a vehicle body. A second hydraulic damper includes one end portion coupled to the other end portion of the first hydraulic damper via a linking member, and the other end portion attached to a second attachment position of the vehicle body. Each of the first and second hydraulic dampers includes a hydraulic cylinder, a piston, a piston rod, a free piston, a compression coil spring, first and second working oil passages to cause first and second oil chambers to communicate with each other, and working oil passage throttles. The first hydraulic damper, second hydraulic damper, and the linking member are coupled in the longitudinal direction. One of the hydraulic cylinder and piston rod is attached to the vehicle body, and the other is coupled to the linking rod.

An arrangement for the temporary pre-tensioning of fork tubes (1, 2) of a telescoping fork, displaceable with respect to each other, comprises a base body (3) attached to a first fork tube (1) to secure and guide at least a first locking element (4) and a second locking element (5), whereby the locking elements (4, 5) interact with a receptacle element (6) attached to the second fork tube (2). A common actuation element (7) is provided within the housing of the base body (3) to actuate the locking elements (4,5).

An arrangement for the temporary pre-tensioning of fork tubes (1, 2) of a telescoping fork, displaceable with respect to each other, comprises a base body (3) attached to a first fork tube (1) to secure and guide at least a first locking element (4) and a second locking element (5), whereby the locking elements (4, 5) interact with a receptacle element (6) attached to the second fork tube (2). A common actuation element (7) is provided within the housing of the base body (3) to actuate the locking elements (4,5).

A lockable lift assist assembly includes a piston assembly moveable between an extended position and a retracted position. A valve assembly is coupled in movement together with the piston assembly. The valve assembly is configured to selectively alter a flow of a hydraulic fluid through a fluid communication path established within the valve assembly to control movement of the piston assembly.