A gas cylinder actuator with overtravel indicator device, which includes a tubular containment jacket, an end face, an opposite annular guiding portion, a stem-piston arranged so as to pass through the annular guiding portion, wherein the stem-piston protrudes from the jacket in an axial direction, a chamber for pressurized gas being defined between the tubular jacket, the end face, the annular guiding portion for the stem-piston, an indicator device for indicating that overtravel for the stem-piston has occurred; and an annular body, which is inserted partially into a corresponding seat between the jacket and an annular portion so as to surround the outer lateral surface of an end portion of the annular guiding portion; the annular body rests in an axial direction on an element that protrudes radially within the jacket and is integral with the jacket.

A closure package for a vibration damper may include a base body that is connectable to a damper tube and comprises a first end and a second end. The first end forms an end side of the damper tube and the second end is disposed in the damper tube. A seal for sealing a piston rod may be disposed in the base body. A seal holder may be disposed between the seal and the base body at the first end. The seal holder for axially fixing the seal may be connected to the base body in a form-fitting and/or force-fitting manner. The seal holder may be fusible in an emergency. For releasing the connection to the base body, the seal holder may be thermoplastically deformable upon overheating of the vibration damper.

A method for monitoring a dual-stage, separated gas/fluid shock strut includes receiving, by a controller, a primary chamber temperature sensor reading, a primary chamber pressure sensor reading, and a shock strut stroke sensor reading, calculating, by the controller, a secondary chamber nominal pressure based upon the primary chamber temperature sensor reading, determining, by the controller, a shock strut stroke associated with the secondary chamber nominal pressure, calculating, by the controller, a volume of oil in an oil chamber, a volume of gas in a primary gas chamber, a number of moles of gas in the primary gas chamber, a volume of oil leaked into the primary gas chamber, a volume of gas in a secondary chamber, and a number of moles of gas in the secondary chamber.

The invention relates to a monitoring sensor (1) for measuring, receiving and transmitting a physical variable (P) of a gas pressure spring (2), comprising a sensor element (3) and a pressure relief opening (4), characterized in that the pressure relief opening (4) can be switched from an operating state into a safety state by remotely triggering the sensor element (3) in order to evacuate the gas pressure spring (2), wherein the monitoring sensor (1) is designed with a connection device (5), which can be detached in accordance with the intended use, for connection to a coupling (6) of the gas pressure spring (2).

Prognostically warning of damper damage in a machine system includes monitoring a machine operating parameter linked with torsional loads on a crankshaft, and a temperature parameter. The prognostic warning strategy also includes populating an operating history of a machine system based on the monitored parameters, calculating a damper damage term based on the operating history, and triggering a damper damage warning where the damper damage term exceeds a threshold.

A valve arrangement regulates a pressure in a hydraulic fluid flow in a valve device in response to an actuating force during an active control operation and mechanically regulates the pressure during a fail-safe operation when no actuating force is present. The valve arrangement comprises a first spring member adapted to be arranged in a valve chamber of the valve device to interact with a valve seat to provide a first restriction by which the hydraulic fluid flow is restricted during active control operation, and a second spring member adapted to be arranged in the valve chamber to provide a second restriction by which the hydraulic fluid flow is restricted during fail-safe operation. During active control operation, an active control flow channel is open. During fail-safe operation, the active control flow channel is substantially closed by means of the first spring member.

A hydraulic shock absorber comprising a shock absorber tube enclosing a hollow piston rod which moves in an oscillating manner corresponding to successive compression stages and rebound stages. The piston rod connects to a working piston that divides the interior of the shock absorber tube into two working areas. A bypass connects the two working areas of the shock absorber tube. The piston slide valve which is used to block and release the bypass is actuated by the pressure of a control pressure medium. The piston slide valve contains a piston slide which can be displaced by the control pressure medium against the force of a restoring spring, and which blocks or releases the bypass. The shock absorber is configured to be switched to a lower damping effect of the rebound stage by means of a controlled pressure application and without changing the damping effect of the compression stage.

An air spring provided by the present application comprises a top plate, a diaphragm, a first rubber metal spring and a second rubber metal spring; the diaphragm is arranged between the top plate and the first rubber metal spring; the first rubber metal spring is hollow to form a cavity, and the cavity of the first rubber metal spring penetrates through a top of the first rubber metal spring in a vertical direction, and the top of the first rubber metal spring is connected to a first support, and a top of the first support corresponds to the top plate to come into contact with the top plate when the diaphragm is out of air; the second rubber metal spring is fixedly inserted in the cavity of the first rubber metal spring; a top of the second rubber metal spring is connected to a second support, and a top of the second support corresponds to the top plate to come into contact with the top plate when the diaphragm is out of air; and, when the diaphragm is inflated, there is a height difference h between the top of the second support and the top of the first support, where the h0. The air spring provided by the present application can ensure ride comfort of the vehicle under a low-load condition and avoid damage to other components resulted from a subsidence of a vehicle body under a heavy-load condition.

A vibration isolation device comprises a frame for mounting on an engine casing, an axis to be mounted to an external component to isolate, a resilient member located between the frame and the axis, and a fuse mechanism ensuring that the vibration isolation device presents a first stiffness when loads applied to said vibration isolation device are below a predetermined threshold load, and a second stiffness, lower than the first stiffness, when loads applied to the vibration isolation device are at least equal to the predetermined threshold load. The fuse mechanism constrains the resilient member within a predetermined space when loads applied to the vibration isolation device are below the predetermined threshold load and to release the resilient member so that this latter is capable of deforming beyond said predetermined space when loads applied to the vibration isolation device are at least equal to the predetermined threshold load.

A dual-stage, separated gas/fluid shock strut arrangement includes a dual-stage, separated gas/fluid shock strut, a pressure/temperature sensor mounted to the primary gas chamber, a stroke sensor, and a monitoring system, comprising a recorder configured to receive a plurality of sensor readings from at least one of the pressure/temperature sensor and the stroke sensor, a landing detector configured to detect a landing event based upon a stroke sensor reading received from the stroke sensor, and a health monitor configured to determine a volume of oil in the oil chamber, a volume of gas in the primary gas chamber, and a volume of gas in the secondary gas chamber.