These teachings relate to a device that includes a base having an axis that is centered and perpendicular relative to the base and two or more arms each connected to the base at a base hinge The base hinge rotates the two or more arms away from the axis, and one or more expandable bands are connected with distal ends of the two or more arms. The one or more expandable bands absorb energy from rotating of the two or more arms. The device absorbs energy when an external force is applied along the axis of the base.

Provided is a spring sleeve for a piston cylinder unit, wherein the spring sleeve is adapted to receive a spring, at least partially, and to guide it, wherein the spring sleeve has a cylindrical sleeve inner surface. The embodiment further relates to a cylinder for a piston cylinder unit, wherein the cylinder) is adapted to be arranged inside a spring of a piston cylinder unit. The embodiment also relates to a piston cylinder unit, including a cylinder, a spring arranged concentrically around the cylinder, and an inner spring sleeve and outer spring sleeve each arranged concentrically around the spring, wherein the cylinder and the spring are arranged inside the inner spring sleeve and the outer spring sleeve. Finally, the embodiment relates to a method of manufacturing such a piston cylinder unit.

A convoluted bellows air spring having at least one belt ring, wherein the convoluted bellows air spring is tiltable about a pivot axis. The invention was based on the object of creating a convoluted bellows air spring for kinematic applications with tiltings, which even in unfavorable situations can nevertheless be operated in conformity with specifications and reliably during tilting of the connection parts, by reliably preventing buckling. This object is achieved in that the belt ring, or if there are a number of belt rings the belt rings, is or are respectively articulated by means of a lever, wherein the articulating pivot axis of the respective lever differs from the pivot axis of the convoluted bellows air spring.

A system for damping vibrations has a damping device which has a fastening anchor configured to be fixed to a component. The anchor has a rod-shaped insertion element and an axial securing element projecting radially from the insertion element. The damping device has an elastic all-metal cushion having an opening dimensioned, in the unexpanded state, such that the axial securing element is not insertable through it. Part of the system is also an installation aid configured to be releasably fastened to the anchor. The installation aid is shaped in such a manner that, when it is fastened to the anchor and the cushion is pushed over the installation aid, said installation aid expands the opening of the cushion in the radial direction to such an extent that the opening of the cushion passes the axial securing element during pushing on, and the cushion latches behind the axial securing element.

A shock absorber including a pressure tube, a piston assembly slidably disposed within the pressure tube, and a fluid transfer tube that extends about the pressure tube is provided. The piston assembly divides an inner volume of the pressure tube into first and second working chambers. An intermediate chamber between the pressure tube and the fluid transfer tube is arranged in fluid communication with the first working chamber. A valve assembly is disposed in fluid communication with the intermediate chamber and the second working chamber. The valve assembly controls fluid flow between the intermediate chamber and the second working chamber. At least part of the intermediate chamber is formed by a fluid transfer channel that extends longitudinally within the fluid transfer tube to provide a fluid flow path extending between the first working chamber and the valve assembly.

A flywheel includes a hub configured to rotate about a longitudinal axis. At least one member having a laminate casing connected to the hub, the laminate casing is formed with an enclosed space for housing at least one mass with a fixed shape. The enclosed space is structured to control radial displacement of the at least one mass. Wherein upon rotation, an operational radial force applies a through thickness laminate radial load to the laminate casing, while simultaneously radially displacing the at least one mass to apply a controllable compressive load on the laminate casing. The applied controllable compressive load increases a predetermined laminate loading capacity by an amount of compressive load counteracting the through thickness laminate radial load, resulting in a corresponding increase in a flywheel angular velocity, that therefore increases an amount of energy stored by the at least one energy storage unit.

A bearing bush for a vehicle is disclosed. The bearing bush includes an inner ring, an outer ring, and an elastomer element between the inner and outer rings. An actuator is configured to cause an application of a force on the elastomer element in a radial direction against at least one of the inner ring and outer ring to alter the rigidity of the bearing bushing. This provides a system for mechanically altering the rigidity of the bearing bush, making the bearing bush switchable between at least two rigidity states.

The invention relates to a device (10) for mechanically adjusting a vibration behavior of a machine element, wherein the device can be coupled to the machine element or is designed as a part of the machine element, the device comprises an adjustment section (11) for the adjustment and a cavity (12) arranged in the adjustment section, and a specified insertion apparatus (20) can be variably inserted into the cavity in such a way that the stiffness of the adjustment section can be changed. Thus the vibration behavior of the machine element can also be varied.

Systems and methods are disclosed for aircraft wheels and brakes systems for use in, for example, an aircraft. In this regard, a damper for an axle may comprise a solid body defined by a cylindrical outside diameter (OD) surface and an elliptical inner surface configured to be inserted into a bore of the axle, the elliptical inner surface defining a void. The damper may comprise a varying thickness between the OD surface and the elliptical inner surface, the varying thickness including a minimum thickness along a major axis of the inner surface and a maximum thickness along a minor axis of the inner surface. The varying thickness may help to decouple a bending mode along the minor axis from the bending mode along the major axis.

Systems and methods are disclosed for aircraft wheels and brakes systems for use in, for example, an aircraft. In this regard, a damper for an axle may comprise a solid body defined by a cylindrical outside diameter (OD) surface and an elliptical inner surface configured to be inserted into a bore of the axle, the elliptical inner surface defining a void. The damper may comprise a varying thickness between the OD surface and the elliptical inner surface, the varying thickness including a minimum thickness along a major axis of the inner surface and a maximum thickness along a minor axis of the inner surface. The varying thickness may help to decouple a bending mode along the minor axis from the bending mode along the major axis.