The present invention provides a vibration mitigation device which includes a vertically extending housing and a reciprocating assembly coupled with and fully enclosed inside of the vertically extending housing. In accordance with an exemplary embodiment of the present invention, the vibration mitigation device may utilize a tension spring as the biasing member while operating in a pneumatic process, an eddy current dampening process or a hybrid combination of the two dampening processes. For low amplitude, the eddy current dampening process may provide improved vibration mitigation results and for higher amplitudes, the pneumatic process may provide improved vibration mitigation results. Other exemplary embodiments include a vibration damping element that utilizes a compression spring as a biasing member for mitigating vibrations. Further exemplary embodiments provide a vibration damping element that utilizes a compression spring and a tension spring as biasing members for mitigating vibrations.

Providing an overturn preventing device which can be mounted to an article such as furniture irrespective of an installation location of the article and which can prevent the article from being overturned by quakes of an earthquake or the like. The overturn preventing device includes a plurality of dampers mounted between a top surface of the furniture installed on a floor surface and a ceiling. The dampers are compression damper that has a smaller damping force generated during an extending operation than a damping force generated during a compressing operation. The dampers have respective axis lines extending from a ceiling side to the top surface side of the furniture, and the axis lines are downwardly inclined and extend in a plurality of directions in a planar view as viewed from above when the dampers are mounted between the top surface of the furniture and the ceiling.

A damper apparatus includes an adjusting bolt including a head part rotatably stored in an adjusting bolt storage part formed in a base part, and a male thread part including a tip end formed in a male thread shape. An adjusting member includes: a female thread part, which is a part in a female thread shape fastened to the male thread part of the adjusting bolt and movably provided along an axis line of the adjusting bolt; a tapered surface part with which the tip end of a push rod comes into contact and formed in a tapered shape with respect to the axis line of the adjusting bolt; and wall parts rising from both ends of the tapered surface part with reference to the circumferential direction of the adjusting bolt, and interposing the push rod therebetween.

The present disclosure provides a single-degree-of-freedom (SDOF) magnetic damping shock absorber based on an eddy current effect, comprising a lower plate, a ring-shaped magnet a, a ring-shaped magnet b, an aluminum cylinder, a bottom copper sheet, a copper sheet, a top copper sheet, a bearing seat, a linear bearing, a bearing end cap, a load, a piston shaft, a stepped shaft, a fixed collar, a coil spring, a lower clamping shaft, and fixing screws. When the shock absorber is working, the ring-shaped magnet a keeps stationary at the lower end and the ring-shaped magnet b reciprocates in the vertical direction. Both magnets are arranged in a mutual attraction manner. Under the action of a time-varying electromagnetic field generated by the relative movement of the ring-shaped magnet b, the copper sheet arranged between the two ring-shaped magnets generates eddy current damping. The movement of the ring-shaped magnet b is inhibited.

A buffer stopper capable of increasing an absorbable energy amount without causing changes in characteristics due to wear of a buffer body. In order to achieve the object, the buffer body containing a rubber elastic body disposed between an end surface formed in a housing and an end surface formed in a shaft which is relatively movable in the axial direction with respect to the housing and a wear resistant sheet which is provided so as to surround the outer peripheral surface of the buffer body and which can contact an inner peripheral surface of the housing by expansion and deformation in the radial direction of the buffer body are provided.

Solar tracker systems include a torque tube, a solar panel attached to the torque tube, and a damper assembly. The damper assembly includes a housing defining first and second chambers, a first fluid passageway extending between the first and second chambers, and a second fluid passageway extending from the second chamber. A piston is moveable relative to the housing and a valve is positioned within the first chamber and moveable to passively control fluid flow. An active lock includes a shaft extending into the second chamber with a seal attached to the shaft. The shaft is selectively moveable between an unsealed position in which the seal is spaced from a chamber wall and a flow path is defined between the first fluid passageway and the second fluid passageway, and a sealed position in which the seal contacts and seals against the chamber wall to obstruct the flow path.

An oleo strut includes an outer cylinder forming a first fluid chamber and an inner cylinder forming a second fluid chamber. The inner cylinder is adapted for sliding concentrically within the outer cylinder in a longitudinal direction. An orifice plate, which is located within the inner cylinder, has holes for fluidly coupling the first fluid chamber with the second fluid chamber. A free-floating washer is constrained in a slot of the orifice plate adjacent the holes and is adapted to move in the longitudinal direction for alternatively blocking and unblocking at least a portion of the holes. During compression of the oleo strut, fluid pushes the washer away from the holes for reducing resistance to fluid flow. During extension of the oleo strut, fluid pushes the washer against the orifice plate covering at least a portion of the holes, which increases the damping force and reduces the extension speed.

A suspension strut includes a cylinder having a piston moveable in the cylinder, a coil spring arranged around the cylinder, and an abutment element for mounting the coil spring. The position of the abutment element is adjustably fixable along the longitudinal direction of the cylinder with respect to one direction, the cylinder has a male thread, and the abutment element has a female thread corresponding to the male thread. A thread insert is arranged in the abutment element, the thread insert has a holding region and an actuating region, and the region between the holding region and the actuating region can be arranged in the threads of the male thread of the cylinder. A holding means for the holding region is in the abutment element, the actuating region is mounted moveably in the abutment element, and the diameter of the thread insert is variable by movement of the actuating region.

A bush-type transmission mount, in which an orifice, operating as a fluid passage that connects a first fluid chamber and a second fluid chamber to each other, is directly formed to a desired length in a core that is coupled to a main rubber to improve vibration-damping characteristics. A membrane is fitted into an outlet portion of the orifice, which communicates with the first fluid chamber, in a sliding manner, thereby improving low-frequency idle vibration and high-frequency dynamic characteristics.

An adjustable vibration damper has at least one adjustable damping valve, a piston at a piston rod that divides a cylinder into a work chamber on the piston rod side and a work chamber on the side remote of the piston rod. A hydraulic device is connected via a first line to the at least one adjustable damping valve connected to one of the work chambers and via a second line at least indirectly to the other working chamber.