An assembly for enabling continuous seat post function during extreme conditions is described and includes: a first valve at least partially, slidably disposed within a stationary piston and for controlling a first fluid pathway there through, wherein the first fluid pathway runs from a first portion and to a second portion of the oil chamber, wherein the stationary piston separates the oil chamber into the first portion and the second portion; and a second valve at least partially disposed within the stationary piston and disposed in series with the first valve and having a second fluid pathway disposed through the first valve and the second valve, being in parallel with the first fluid pathway, running from the first portion to the second portion of the oil chamber, and providing a bypass for oil to flow from the first portion to the second portion when the first fluid pathway is closed.

A gas spring with a casing with an axially extending side wall, an open end and a closed end wall spaced from the open end and a pressure chamber provided in part by the walls to receive a gas therein under pressure and a piston rod slidably received in a housing received in the casing and movable between extended and retracted positions. A pressure relief collar slidably carried around the piston rod and normally projecting axially outwardly of the casing can be displaced axially inwardly during an overtravel condition of the piston rod to displace a portion of a piston rod seal to open an overpressure relief path to allow pressurized gas in the pressure chamber to escape to the outside of the gas spring.

An electromagnetically actuated piston slide valve includes a piston slide arrangement with a piston which is axially displaceable for regulating a free cross section of a fluid passage of the valve. The piston slide arrangement contains a first magnetic armature connected to the piston and a second magnetic armature which is axially displaceable with respect to the piston. The piston is axially displaceable against the force of a first biasing spring by generating an electromagnetic field through energizing a coil. A second biasing spring rests against the first magnetic armature and the second magnetic armature, so, in the unenergized state of the coil, the piston takes a predetermined position by axial displacement due to the force of the first biasing device against the force of the first biasing device. A permanent magnet generates an attractive force between the first and the second magnetic armature which counteracts the second biasing spring.

The present disclosure relates to a flywheel system (1), comprising a ring-shaped flywheel rotor (3), arranged on a rotation axis (7); and a substantially cylindrical casing (2), enveloping the flywheel rotor (3) at least in a radial direction to contain the flywheel (3) in case of a calamity. The flywheel system (1) further exhibits the feature that the casing (2) comprises and having at least one inward protruding bumper (8) defining a variation from the circular shape in cross section of the casing wall (5) surrounding the flywheel rotor (3). The casing wall (5) may itself be circular and the bumper (8) can define a deviation relative to the circular shape thereof, to enhance deceleration of the flywheel rotor (3), if, in case of an accident or calamity, the flywheel rotor (3) comes loose.

A gas cylinder actuator with safely device, comprising a tubular containment jacket, two opposite heads for closing the tubular jacket, with corresponding sealing elements between the heads and the jacket, a first head having a through hole for the passage of a stem-piston, and a second opposite head, a stem-piston, between the tubular jacket, the heads and the stem-piston there being a chamber for pressurized gas, wherein at least one head of the two heads is constituted by a body that is separate with respect to the tubular jacket and is retained in the tubular jacket by means of an extraction-preventing shoulder that protrudes from the body of the head and is adapted to abut against a corresponding internal annular protrusion that protrudes radially from the internal surface of the tubular jacket.

To provide a rotary inertia mass damper, which is capable of reducing an axial reaction force that is generated due to vibration having an excessive acceleration to the extent possible when the vibration is input, and of preventing breakage of the damper itself or a construction, provided is a rotary inertia mass damper, including: a first coupling portion, which is fixed to a first structure; a second coupling portion, which is coupled to a second structure; a screw shaft, which has one axial end connected to the first coupling portion and retained so as to be non-rotatable; a fixed barrel, which has a hollow portion for receiving the screw shaft, and is connected to the second coupling portion; and a rotary body, which is retained so as to be freely rotatable relative to the fixed barrel, is threadedly engaged with the screw shaft, and is configured to reciprocally rotate in accordance with advancing and retreating movement of the screw shaft relative to the fixed barrel. A torque limiting member is provided between an axial end of the screw shaft and the first coupling portion, and is configured to, when a rotational torque that exceeds a predetermined value is applied to the screw shaft, allow rotation of the screw shaft relative to the first coupling portion to reduce a rotation angle of the rotary body.

A gas cylinder actuator with overtravel safety device, comprising: a tubular containment jacket, two opposite heads for closing the tubular jacket, with corresponding sealing elements between the heads and the jacket, one head of which being provided with a through passage hole for a stem-piston, a stem-piston, between the tubular jacket, the heads and the stem-piston there being a chamber for pressurized gas, the gas cylinder actuator being characterized in that the tubular jacket has, at at least one of the portions affected by a head, a lightened portion that is preset to be deformed in case of compression in an axial direction, allowing the relative axial movement of the corresponding head toward the inside of the tubular jacket so as to form a gas discharge passage between the jacket, the head and the corresponding sealing element.

Damping valve device, having a pre-stage valve and a main-stage valve. An actuating force on the main-stage valve body is set via the pre-stage valve, which can be adjusted by a solenoid coil. The damping valve device has an emergency operation device, which sets a defined closing force at the pre-stage valve in the event of a failure of the power supply of the damping valve device. The emergency operation device is formed by at least one permanent magnet within a magnetic flux circuit of the solenoid coil.

An assembly for enabling continuous seat post function during extreme conditions is described and includes: a first valve at least partially, slidably disposed within a stationary piston and for controlling a first fluid pathway there through, wherein the first fluid pathway runs from a first portion and to a second portion of the oil chamber, wherein the stationary piston separates the oil chamber into the first portion and the second portion; and a second valve at least partially disposed within the stationary piston and disposed in series with the first valve and having a second fluid pathway disposed through the first valve and the second valve, being in parallel with the first fluid pathway, running from the first portion to the second portion of the oil chamber, and providing a bypass for oil to flow from the first portion to the second portion when the first fluid pathway is closed.

A vibration damper for a motor vehicle may include a damper tube, a piston rod that moves in the damper tube, a working piston attached to the piston rod that divides the damper tube into two working spaces, and first and second damping valves each with an adjustable damping force. Damping liquid may pass through the first damping valve as the piston rod retracts and through the second damping valve as the piston rod extends. Each damping valve may include a valve body that can be moved by a separate, controllable drive device between a closed position and an open position to set a throughflow cross section of each respective damping valve. The valve bodies may be loaded by restoring means counter to an actuating force of the drive device. A first of the restoring means may load a first of the valve bodies into its open position, and a second of the restoring means may load a second of the valve bodies into its closed position.