A bicycle rear derailleur has a base member mountable to a bicycle frame, a movable member movably coupled to the base member, a chain guide assembly rotatably connected to the movable member for rotation about a rotational axis, a biasing element configured and arranged to bias the chain guide assembly for rotation in a first rotational direction with respect to the movable member, and a fluid damper having a fluid cavity containing a volume of fluid. The fluid damper is operatively disposed between the chain guide assembly and the movable member to apply a damping force to the chain guide assembly when the chain guide assembly rotates in a second rotational direction opposite to the first rotational direction. The fluid damper has a guide wheel configured to route a chain and rotatable about the rotational axis.

A bicycle rear derailleur has a base member mountable to a bicycle frame, a movable member movably coupled to the base member, a chain guide assembly rotatably connected to the movable member for rotation about a rotational axis, a biasing element configured and arranged to bias the chain guide assembly for rotation in a first rotational direction with respect to the movable member, and a fluid damper having a fluid cavity containing a volume of fluid. The fluid damper is operatively disposed between the chain guide assembly and the movable member to apply a damping force to the chain guide assembly when the chain guide assembly rotates in a second rotational direction opposite to the first rotational direction. The fluid damper has a guide wheel configured to route a chain and rotatable about the rotational axis.

[Problem] The present invention provides a damping force adjustable shock absorber capable of reducing manufacturing cost. [Means for Solving] A shock absorber 1 is configured in such a manner that a main valve 32 is disposed below a piston valve 5, and a sub valve 68 for variably adjusting a set load of the main valve 32 is provided in a piston case 21 above the piston valve 5, with a first valve body 53 of the sub valve 68 slidably sealed to a case member 60 by a metal seal at only one portion. Due to the configuration, the shock absorber 1 can ease precision of components of the sub valve 68, thereby reducing the manufacturing cost.

[Problem] The present invention provides a damping force adjustable shock absorber capable of reducing manufacturing cost. [Means for Solving] A shock absorber 1 is configured in such a manner that a main valve 32 is disposed below a piston valve 5, and a sub valve 68 for variably adjusting a set load of the main valve 32 is provided in a piston case 21 above the piston valve 5, with a first valve body 53 of the sub valve 68 slidably sealed to a case member 60 by a metal seal at only one portion. Due to the configuration, the shock absorber 1 can ease precision of components of the sub valve 68, thereby reducing the manufacturing cost.

A damper assembly includes a cylinder defining a chamber. The damper assembly includes a body supported by the cylinder and having a first surface and a second surface opposite the first surface. The body defines a passage extending from the first surface to the second surface. One of the first surface or the second surface define a slope at the passage. The damper assembly includes a check disc at the slope, the check disc selectively restricting fluid flow through the passage.

A damper assembly includes a cylinder defining a chamber. The damper assembly includes a body supported by the cylinder and having a first surface and a second surface opposite the first surface. The body defines a passage extending from the first surface to the second surface. One of the first surface or the second surface define a slope at the passage. The damper assembly includes a check disc at the slope, the check disc selectively restricting fluid flow through the passage.

A damper assembly includes a pressure tube defining a chamber. The damper assembly includes a body supported by the pressure tube. The body has a first surface and a second surface opposite and spaced from the first surface along an axis. The body defines a passage extending from the first surface to the second surface. The damper assembly includes an orifice disc movable from an unflexed position to a first flexed position and movable from the first flexed position to a second flexed position. The orifice disc in the unflexed position is spaced from the first surface radially outward and radially inward of the passage. The orifice disc in the first flexed position is spaced from the first surface radially outward of the passage and abuts the first surface radially inward of the passage. The orifice disc in the second flexed position abuts the first surface radially outward and radially inward of the passage.

Solar tracker systems include a torque tube, a column supporting the torque tube, a solar panel attached to the torque tube, and a damper assembly. The damper assembly includes an outer shell surrounding an inner shell and defining an outer fluid channel. A piston is positioned within the inner shell and moveable relative thereto. A locking valve of the damper assembly includes a shaft extending into a chamber and a seal attached to the shaft. The shaft is selectively moveable axially within the chamber along an extension axis between an unsealed position in which the seal is spaced from a chamber wall and a flow path is defined that extends from within the inner shell, through the chamber, and to the outer fluid channel, and a sealed position in which the seal contacts the chamber wall and the locking valve obstructs the flow path.

Solar tracker systems include a torque tube, a column supporting the torque tube, a solar panel attached to the torque tube, and a damper assembly. The damper assembly includes an outer shell surrounding an inner shell and defining an outer fluid channel. A piston is positioned within the inner shell and moveable relative thereto. A locking valve of the damper assembly includes a shaft extending into a chamber and a seal attached to the shaft. The shaft is selectively moveable axially within the chamber along an extension axis between an unsealed position in which the seal is spaced from a chamber wall and a flow path is defined that extends from within the inner shell, through the chamber, and to the outer fluid channel, and a sealed position in which the seal contacts the chamber wall and the locking valve obstructs the flow path.

A multi-stage adjusting damping valve as well as a shock absorber and suspension system using the damping valve are provided. The multi-stage adjusting damping valve comprises a throttle valve, an overflow valve and a multi-stage pilot valve. The multi-stage pilot valve comprises a mechanical regulating valve and a plurality of high-speed switch electromagnetic valves having different throttle hole diameters. The damping valve is connected between a rod cavity and an oil storage cavity of the shock absorber by means of a middle cavity, and the multi-stage damping rapid regulation of the shock absorber is achieved through high-frequency opening and closing of a high-speed switching electromagnetic valve, and in comparison, the machining precision, the manufacturing cost and the control and calibration difficulty of the present disclosure are greatly reduced.