A filter for use at an airflow opening of bellows of a shock absorber. The filter device includes a filter body through which a gas, in particular air, can flow in in the direction of an air inflow direction and out in the direction of an air outflow direction. The airflow opening is a joint air inlet and air outlet opening. A fastening means is disclosed that is fitted with a filter, in particular a fastening ring fitted therewith, for fastening bellows to a shock absorber.

A hydraulic damper includes: a rod that is inserted into a cylinder containing liquid; a piston that is connected to the rod and partition the cylinder into a first liquid chamber and a second liquid chamber; a channel forming part having a channel between the first liquid chamber and the second liquid chamber; a valve part configured to open and close the channel and generate damping force; and a damping force changer including an inflow part into which the liquid flows and configured to change the damping force by using liquid pressure in the inflow part. The damping force changer includes: a pressure changing part that changes the liquid pressure in the inflow part by being deformed or displaced; a support part that supports the pressure changing part; and an inflow forming part that holds the support part and forms the inflow part jointly with the support part.

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 filter for use at an airflow opening of bellows of a shock absorber. The filter device includes a filter body through which a gas, in particular air, can flow in in the direction of an air inflow direction and out in the direction of an air outflow direction. The airflow opening is a joint air inlet and air outlet opening. A fastening means is disclosed that is fitted with a filter, in particular a fastening ring fitted therewith, for fastening bellows to a shock absorber.

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 hydraulic damper includes: a rod that is inserted into a cylinder containing liquid; a piston that is connected to the rod and partition the cylinder into a first liquid chamber and a second liquid chamber; a channel forming part having a channel between the first liquid chamber and the second liquid chamber; a valve part configured to open and close the channel and generate damping force; and a damping force changer including an inflow part into which the liquid flows and configured to change the damping force by using liquid pressure in the inflow part. The damping force changer includes: a pressure changing part that changes the liquid pressure in the inflow part by being deformed or displaced; a support part that supports the pressure changing part; and an inflow forming part that holds the support part and forms the inflow part jointly with the support part.