A ram air turbine (RAT) actuator piston can include a body defining a piston structure having an inner cavity. The piston can include one or more damping holes axially defined through the body to the inner cavity and a lock rod hole defined axially through the body to the inner cavity. The lock rod hole can have a larger flow area than one or more of the one or more damping holes. The lock rod hole can be configured to receive a lock rod of a RAT actuator to at least partially block flow through the lock rod hole when the lock rod is in a locked position. The one or more damping holes can be configured to allow flow through the damping holes in the locked position to allow the RAT actuator piston to move within the RAT actuator in the locked position to dissipate vibratory loads.

A vehicle door positioning holder includes a hydraulic cylinder connected to the door and a vehicle chassis, and a brake hydraulically connected in a loop. The cylinder pushes hydraulic fluid in the loop when the door is moved. The brake includes first and second chambers hydraulically connected to the loop and a third chamber connected in the loop at respective ends to the first and second chambers. The brake has a ball element in the third chamber when the hydraulic fluid is still, moved towards the first chamber as the hydraulic fluid flows in a first direction, and moved towards the second chamber as the hydraulic fluid flows in a second direction. A flow resistance of the hydraulic fluid is larger when the ball is positioned in the third chamber than when the ball is moved towards the first or the second chambers.

An electromechanical chassis actuator includes a single electric motor and two screw drives. The two screw drives use a common threaded spindle. A spindle nut of the first screw drive is rotationally fixed to the electric motor's rotor and engages the threaded spindle in a back-driveable manner. A spindle nut of the second screw drive is selectively coupled to the electric motor's rotor by a coupler and engages the threaded spindle in a self-locking (not back-driveable) manner. When the coupler is in an engaged position, the actuator operates in a level-adjustment mode. When the coupler is in a released position, the actuator operates in a damping mode.

An electromechanical chassis actuator includes a single electric motor and two screw drives. The two screw drives use a common threaded spindle. A spindle nut of the first screw drive is rotationally fixed to the electric motor's rotor and engages the threaded spindle in a back-driveable manner. A spindle nut of the second screw drive is selectively coupled to the electric motor's rotor by a coupler and engages the threaded spindle in a self-locking (not back-driveable) manner. When the coupler is in an engaged position, the actuator operates in a level-adjustment mode. When the coupler is in a released position, the actuator operates in a damping mode.

Provided is a length-adjustable column with a standpipe having a longitudinal axis, a length-adjustment device arranged in the standpipe with a portion displaceably-mounted along the longitudinal axis with respect to the standpipe and an anti-rotation locking device for locking the portion against a rotation around the longitudinal axis relative to the standpipe. The anti-rotation locking device includes an inner element, which is fastened to an outer surface of the portion, and an outer element, which is fastened to an inner surface of the standpipe. The inner element cooperates with positive locking with the outer element against a rotation around the longitudinal axis, and is displaceably guided along the longitudinal axis by the outer element. The inner element is connected with the portion through a substance-to-substance connecting layer.

A sway bar system is described. The sway bar system includes a sway bar having a first end and a second end. The sway bar system further includes a first electronically controlled damper link which is coupled to the first end of the sway bar. The first electronically controlled damper link is configured to be coupled a first location of a vehicle. The sway bar system also has a second link which is coupled to the second end of the sway bar. The second link is configured to be coupled a second location of the vehicle.

A sway bar system is described. The sway bar system includes a sway bar having a first end and a second end. The sway bar system further includes a first electronically controlled damper link which is coupled to the first end of the sway bar. The first electronically controlled damper link is configured to be coupled a first location of a vehicle. The sway bar system also has a second link which is coupled to the second end of the sway bar. The second link is configured to be coupled a second location of the vehicle.

A latch assembly for a shock strut may comprise a first linkage coupled to a strut cylinder and a shrink piston of the shock strut. A second linkage may be coupled to the strut cylinder. The second linkage may be configured to rotate the first linkage in response to the shock strut translating between a landing gear up position and a landing gear down position.

A latch assembly for a shock strut may comprise a first linkage coupled to a strut cylinder and a shrink piston of the shock strut. A second linkage may be coupled to the strut cylinder. The second linkage may be configured to rotate the first linkage in response to the shock strut translating between a landing gear up position and a landing gear down position.

A damper device includes an outer cylinder, an inner cylinder disposed inside the outer cylinder and having an inner chamber, a lower open end, and an upper closed end wall with a vent hole, a piston disposed in the inner chamber and having a passageway, a check valve coupled to the passageway to permit only upward flowing of a working fluid in the inner chamber through the passageway, and a piston rod having a lower rod end disposed outwardly of the outer cylinder, and an upper rod mounted to permit the piston to slide with the piston rod. The sliding of the piston rod is dampened by sliding of the piston in the inner chamber. A hinge assembly including the damper device is also disclosed.