A solar tracker system includes a torque tube, a solar panel assembly attached to the torque tube, a housing defining a chamber and a fluid passageway extending from the chamber, and an active lock connected to a seal configured to prevent a flow path of fluid while in a sealed state and allow the flow path of fluid in an unsealed state. The system further includes a controller in communication with the torque tube and the active lock. The controller is programmed to receive a command to place the solar panel assembly in a stowed position, instruct the torque tube to rotate the panel assembly to a stowed angle corresponding to the stowed position, monitor a current angle of the panel assembly, compare the current angle to the stowed angle, and instruct the seal to transition to the sealed state when the current angle is equal to the stowed angle.

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 ring circumscribing a moveable rod of a hydraulic damper, the moveable rod defining a central axis, the ring comprising a first circumferential surface, a second circumferential surface, a first finger, a second finger, a first flange, and a second flange. The first finger and the first flange defining a first end of the ring. The second finger and the second flange defining a second end of the ring.

A ring circumscribing a moveable rod of a hydraulic damper, the moveable rod defining a central axis, the ring comprising a first circumferential surface, a second circumferential surface, a first finger, a second finger, a first flange, and a second flange. The first finger and the first flange defining a first end of the ring. The second finger and the second flange defining a second end of the ring.

The present invention relates to a hydraulic damper comprising a main tube; a main piston assembly; a base valve assembly; and a hydraulic compression stop assembly comprising an insert fixed on the base valve assembly, and an additional piston assembly apt to be introduced inside the first inner chamber of the insert at the end of the damper compression stroke to generate additional damping force. Said additional piston assembly comprises a piston rod extender fixed to the piston assembly or the piston rod at the side of the compression chamber, and a tenon fixed to said piston rod extender and radially displaceable with regard thereto, wherein said tenon is terminated with a first entry surface having diameter monotonically diminishing towards the compression end of said tenon, while the insert is provided with a second entry surface having diameter monotonically increasing towards the rebound end of the insert.

The present invention relates to a hydraulic damper comprising a main tube; a main piston assembly; a base valve assembly; and a hydraulic compression stop assembly comprising an insert fixed on the base valve assembly, and an additional piston assembly apt to be introduced inside the first inner chamber of the insert at the end of the damper compression stroke to generate additional damping force. Said additional piston assembly comprises a piston rod extender fixed to the piston assembly or the piston rod at the side of the compression chamber, and a tenon fixed to said piston rod extender and radially displaceable with regard thereto, wherein said tenon is terminated with a first entry surface having diameter monotonically diminishing towards the compression end of said tenon, while the insert is provided with a second entry surface having diameter monotonically increasing towards the rebound end of the insert.

A vibration damper having a hydraulic compression stop includes: a cylinder filled with a damping medium; a piston rod guided in the cylinder the cylinder having a first piston fastened to the piston rod and slidable on an inner wall of the cylinder; and a second piston arranged on the piston rod at an axial distance from the first piston the second piston being slidable in a pressure cylinder. The pressure cylinder is formed with respect to the cylinder by a separate plastic pressure sleeve having a bottom, and the bottom of the pressure sleeve and a coating surface of the base on a side of the base facing away from the pressure sleeve are connected to each other via at least one web.

The damper assembly includes a tubular member, a rod, a primary piston, a secondary piston, and a resilient member. The tubular member includes a sidewall and a cap positioned at an end of the sidewall. The sidewall and the cap define an inner volume. The sidewall includes a shoulder separating the tubular member into a first portion and a second portion. The resilient member is disposed between the secondary piston and the cap and thereby is positioned to bias the secondary piston into engagement with the shoulder.

The damper assembly includes a tubular member, a rod, a primary piston, a secondary piston, and a resilient member. The tubular member includes a sidewall and a cap positioned at an end of the sidewall. The sidewall and the cap define an inner volume. The sidewall includes a shoulder separating the tubular member into a first portion and a second portion. The resilient member is disposed between the secondary piston and the cap and thereby is positioned to bias the secondary piston into engagement with the shoulder.