An impact absorber is provided and is configured to be positioned between a protected object and an impacted object during use to prevent substantial damage to the impacted object from the impact of an external force. The impact absorber includes an outer absorption element and an inner absorption element positioned within the outer absorption element. The outer absorption element includes an outer wall enclosing a primary chamber, with the primary chamber configured to hermetically contain a first fluid under a first pressure, with the outer wall including an impacted side and a protected side, where the protected side is configured to be directed toward the protected object during use, and the impacted side is configured to be directed toward the impacted object during use. The first inner absorption element includes a first wall enclosing a first chamber, with the first inner absorption element being positioned within the primary chamber with the first chamber and being surrounded by the first fluid, where the first chamber is configured to hermetically contain a second fluid under a second pressure, with the second pressure being equal to or differing from the first pressure.

An impact absorber is provided and is configured to be positioned between a protected object and an impacted object during use to prevent substantial damage to the impacted object from the impact of an external force. The impact absorber includes an outer absorption element and an inner absorption element positioned within the outer absorption element. The outer absorption element includes an outer wall enclosing a primary chamber, with the primary chamber configured to hermetically contain a first fluid under a first pressure, with the outer wall including an impacted side and a protected side, where the protected side is configured to be directed toward the protected object during use, and the impacted side is configured to be directed toward the impacted object during use. The first inner absorption element includes a first wall enclosing a first chamber, with the first inner absorption element being positioned within the primary chamber with the first chamber and being surrounded by the first fluid, where the first chamber is configured to hermetically contain a second fluid under a second pressure, with the second pressure being equal to or differing from the first pressure.

A formation method for liquid rubber composite nodes with a tubular flow channel is provided. The formation method includes adding a middle spacer sleeve between an outer sleeve and a mandrel, bonding the middle spacer sleeve and the mandrel together through rubber vulcanization and assembling the integrated middle spacer sleeve and the mandrel into the outer sleeve; installing a tubular flow channel in the mandrel; hollowing the middle spacer sleeve to form a plurality of spaces; after vulcanization, forming a plurality of interdependent liquid cavities by using rubber and the plurality of spaces; and arranging liquid in the plurality of liquid cavities and communicating the plurality of liquid cavities through the tubular flow channel.

A formation method for liquid rubber composite nodes with a tubular flow channel is provided. The formation method includes adding a middle spacer sleeve between an outer sleeve and a mandrel, bonding the middle spacer sleeve and the mandrel together through rubber vulcanization and assembling the integrated middle spacer sleeve and the mandrel into the outer sleeve; installing a tubular flow channel in the mandrel; hollowing the middle spacer sleeve to form a plurality of spaces; after vulcanization, forming a plurality of interdependent liquid cavities by using rubber and the plurality of spaces; and arranging liquid in the plurality of liquid cavities and communicating the plurality of liquid cavities through the tubular flow channel.

Some examples of rotating shaft damping with electro-rheological fluid can be implemented as a method. At least a portion of a circumferential surface area of a portion of a rotorcraft rotating shaft is surrounded with multiple hollow members. Each hollow member includes an electro-rheological fluid having a viscosity that changes based on an electric field applied to the electro-rheological fluid. A vibration of the rotorcraft rotating shaft is controlled by changing the viscosity of the electro-rheological fluid in response to the electric field applied to the electro-rheological fluid.

The present disclosure relates to a strut assembly for use with a vehicle. The strut assembly has a shock absorber having a shock absorber tube, a lower spring seat, a tubular member and a coil spring. The lower spring seat supports one end of the spring and includes a tubular member having an inner wall surface, and is configured to receive the shock absorber tube therein. The lower spring seat has an annular member extending radially outwardly from the tubular member with a surface for supporting the one end of the coil spring thereon. The tubular member has a portion constructed to deform and collapse in response to a predetermined excessive force experienced by the shock absorber.

A bearing with a core and a sheath which surrounds the core, wherein the core is supported against the sheath by at least one elastomer or a plurality of elastomers, wherein at least two functional chambers which contain a working fluid are formed between the core and the sheath, and wherein the functional chambers are bounded at least partially by the elastomer or elastomers, characterized, with respect to the problem of configuring a bearing in such a way that a drop in rigidity of the bearing is as small as possible at low temperatures, in that at least one equalizing chamber is provided for an equalizing fluid, from which the equalizing fluid can be diverted into the functional chambers, wherein the equalizing fluid in the equalizing chamber is separated from a gas-filled space or a plurality of gas-filled spaces by a movable or elastic separating element.

An engine mount includes a nozzle plate mounted between an insulator and a diaphragm so as to divide an interior into an upper liquid chamber and a lower liquid chamber, and an annular flow path formed in the nozzle plate so that an encapsulated hydraulic liquid flows between the upper liquid chamber and the lower liquid chamber, the nozzle plate being opened at an upper side of the flow path; a shielding member which has two or more shielding plates arranged to cover the upper side of the flow path; an adjusting bolt which is rotatably mounted in a core coupled to the insulator; and a connector, in which the shielding plates are folded or unfolded in accordance with a rotation of the adjusting bolt, and a size of an upper flow path hole is determined depending on a state in which the shielding plates are folded or unfolded.

An autonomous hydraulic expansion and contraction apparatus comprises a fixing unit, a cylinder unit, a support unit, a piston unit, a valve unit and oil supply parts. By controlling the expansion and contraction length of the support part by a simple manipulation of the valve part by moving the lever, the autonomous hydraulic expansion and contraction apparatus can be easily expanded and contracted to the combined length of the expansion and contraction equipment, and additionally, the convenience of use can be enhanced.

A vibration isolator includes first and second mounting members; an elastic body connecting the mounting members; a partition member partitioning a liquid chamber in the first mounting member into a primary liquid chamber using the elastic body as a part of a wall surface thereof and a secondary liquid chamber; and a movable member housed in a housing chamber provided within the partition member, the movable member being deformable or displaceable in an axial direction of the first mounting member. The partition member includes communicating holes that extend from a portion of the partition member which is exposed to the primary liquid chamber or the secondary liquid chamber toward an inside of the partition member and are opened toward the movable member. The partition member is equipped with partition plate parts dividing the housing chamber from the primary liquid chamber and dividing the housing chamber from the secondary liquid chamber.