A vibration-damping device includes a partition member provided with an orifice passage that allows a main liquid chamber and an auxiliary liquid chamber to communicate with each other, a plurality of first communication holes that allows the main liquid chamber and an accommodation chamber to communicate with each other, and a second communication hole that allows the auxiliary liquid chamber and the accommodation chamber to communicate with each other. A tubular member that protrudes in an axial direction toward the elastic body is disposed on a first wall surface of the partition member to which the first communication holes are open and which constitutes a portion of an inner surface of the main liquid chamber. The plurality of first communication holes are open to both an inner portion located inside the tubular member and an outer portion located outside the tubular member, on the first wall surface.

A high tension coil spring structure for a bed mattress includes spring bodies and exposed wiring portions which absorb an external load. Diameter-increasing portions (A) are formed on at least one of upper and/or lower end wiring portions (14, 14) of body wiring portions (12), and provide spaces in which upper and/or lower exposure start wiring portions (16-5, 16-5) move upward and downward. Rigid support ends (18) are formed on at least one of the body wiring portions (12) and upper and lower exposed wiring portions (16, 16), and absorb a compressive load. The diameter-increasing portions and the rigid ends of the coil spring structure fundamentally prevent noise caused by friction between the exposed wiring portions and surrounding wiring portions when the exposed wiring portions are compressed and significantly increase the elasticity of the exposed wiring portions.

A piston of a magnetic rheological fluid shock absorber comprises a piston core that is formed from a magnetic material and is provided with a coil on the outer periphery thereof, and a ring body that is formed from a magnetic material, surrounds the outer periphery of the piston core. A flow path of the magnetic rheological fluid is formed between the ring body and the piston core. The flow path of the magnetic rheological fluid comprises a first flow path part having a predetermined cross-sectional flow area, and a second flow path part having a larger cross-sectional flow area than the predetermined cross-sectional flow area and a longer axial length than the coil to cover the outer periphery of the coil.

A tubular vibration-damping device including an inner shaft member and an outer tube member connected by a main rubber elastic body. The outer tube member is configured to be slidably inserted in an attachment tube in an axial direction, and is circumferentially divided so as to be radially deformable or displaceable. A pair of tighteners are disposed on axially opposite sides of the main rubber elastic body. The main rubber elastic body is fastened to an inner circumferential surface of the outer tube member. An adjustment elastic body against which the tighteners are pressed is integrally formed with axially opposite side portions of the main rubber elastic body. Sliding resistance in the axial direction between an outer circumferential surface of the outer tube member and an inner circumferential surface of the attachment tube is settable depending on a pressing force of the tighteners against the adjustment elastic body.

A damping assembly includes a mount comprising a circular opening and a support configured to be inserted into said circular opening of said mount. The support comprises a baseplate having a cylindrical outer lateral surface. The support comprises a damping cylinder comprising an inner lateral surface surrounding the outer lateral surface of said base and an outer lateral surface configured to be held on said circular opening. Said damping cylinder comprises at least one radial projection protruding from the inner lateral surface of said damping cylinder or from the outer lateral surface of said damping cylinder.

A subsea equipment assembly includes a first component having an axis, a second component, and an anti-vibration bracket. The anti-vibration bracket is attached to the first component and the second component. In use the first component is caused to vibrate at least in a radial direction relative to the axis. The anti-vibration bracket includes a plate portion. The plate portion extends at least radially away from the first component and includes an attachment region located a radial distance away from the first component, the second component is attached to the attachment region. The anti-vibration bracket includes an array of slots, at least some of the slots of the array of slots are located between the first component and the attachment region.

Various implementations include a device for controlling vibration with piecewise-linear nonlinearity. The device includes a stiffness element, a mass, a stopper, and an actuator. The stiffness element is expandable and compressible along an axis. The mass is coupled to the stiffness element. The mass has a resting mass position along the axis. The actuator is coupled to the stopper. The actuator is configured to move the stopper along the axis to vary a gap size. The gap size is measured as a distance between the resting mass position and a resting stopper position.

Vibratory screen damper apparatus, systems, and methods are described. In some embodiments, the damper comprises first and second slide portions. In some embodiments, the damper both pivots and alternately extends and retracts during vibration of the vibratory screen.