The rotary inertial mass damper has a configuration in which the rotary shaft of the oil-pressure motor rotates due to oil pressure of operating oil that is extruded from an oil chamber through reciprocating movement of the piston rod, and viscosity resistance is produced in operating oil that circulates in the connection pipes.

An isolator comprising a pulley having a pulley stop, a plate attached to the pulley, a shaft, the pulley journalled to the shaft, a torsion spring attached to the shaft, a damping member attached to the torsion spring, the damping member disposed between the plate and the pulley, and the damping member compressing a damping fluid against the pulley stop.

A hydraulic damper includes a piston slidable within a cylinder and dividing the cylinder into first and second chambers and a piston rod for driving the piston, the piston rod including a fluid passageway in fluid communication with the first and second fluid chambers wherein the piston is slidably moveable along the cylinder in compression and rebound, where compression results in fluid flowing through the passageway from the first to the second fluid chamber, and rebound results fluid flowing through the passageway from the second to the first fluid chamber. An adjustment mechanism located within the fluid passageway includes a compression member and a tapered valve head for adjusting the restriction of fluid flow through the passageway when the piston is in compression and a rebound adjustment member and a tapered valve head for adjusting the restriction of fluid flow through the passageway when the piston is in rebound.

An input device includes a brake applying unit configured to apply a braking force to a rotating body and a torque applying unit configured to apply a driving torque to the rotating body. The brake applying unit includes a rotary plate rotatable together with the rotating body, magnetic viscous fluid disposed in a gap between a fixed portion and the rotary plate, and a brake applying coil configured to apply a magnetic field to the magnetic viscous fluid. The torque applying unit includes a stator and a rotor. One of the stator and the rotor includes a magnet and the other includes torque applying coils inducing magnetic fields for generating the driving torque. A controller is provided to control currents applied to the brake applying coil and the torque applying coils. The torque applying unit is disposed to surround an outer periphery of the brake applying unit.

A one-way damper mechanism, which can properly operate a damper by appropriately engaging a gear and a rotary damper so as to reduce wobbling, is provided. A one-way damper mechanism includes a gear-holding member provided with a gear engaging with a rack, which relatively moves to the rack; and a damper-holding member provided with a rotary damper, which relatively moves to the rack, and the one-way damper mechanism changes between a braking state wherein the gear and a damper gear are engaged, and a release state wherein the gear and the damper gear are separated.

A one-way damper mechanism, which can properly operate a damper by appropriately engaging a gear and a rotary damper so as to reduce wobbling, is provided. A one-way damper mechanism includes a gear-holding member provided with a gear engaging with a rack, which relatively moves to the rack; and a damper-holding member provided with a rotary damper, which relatively moves to the rack, and the one-way damper mechanism changes between a braking state wherein the gear and a damper gear are engaged, and a release state wherein the gear and the damper gear are separated.

An operation device includes an operation unit including an operation body worked by an operator's manipulation; a position detecting part detecting a position of the operation body; and a display unit displaying a position of the operation body. The display unit includes an operation member, a supporting body, and a movable load applying mechanism including a movable member, a magnetic generating mechanism, a magnetorheological fluid, and an operation controlling part. The display unit includes a display part displaying the operation position. A display controlling part PS controls a display. A controller is included to control the operation controlling part and the display controlling part. In a control method of the operation device, the controller controls to display a state of the operation position of the operation body on the display part.

An operation device includes an operation unit including an operation body worked by an operator's manipulation; a position detecting part detecting a position of the operation body; and a display unit displaying a position of the operation body. The display unit includes an operation member, a supporting body, and a movable load applying mechanism including a movable member, a magnetic generating mechanism, a magnetorheological fluid, and an operation controlling part. The display unit includes a display part displaying the operation position. A display controlling part PS controls a display. A controller is included to control the operation controlling part and the display controlling part. In a control method of the operation device, the controller controls to display a state of the operation position of the operation body on the display part.

An input device, such as a joystick, has an operating device, a magnetorheological brake device, and a controller for activating the brake device. An operating lever is disposed on a supporting structure for pivoting around at least one pivot axis. The brake device is coupled with the pivot axis for controlled damping of a pivoting motion of the operating lever. The brake device has a rotary damper with two components, namely, an inside component and an outside component. The outside component radially surrounds the inside component and a damping gap is formed in between that is filled with a magnetorheological medium. The damping gap can be exposed to a magnetic field to damp a pivoting motion between the two contrapivoting components about an axis. One of the components has radial arms equipped with an electric coil whose winding extends adjacent to and spaced apart from the axis.

A damper is provided which can more reliably prevent malfunction and breakdown and which enables efficiently performing repair and inspection operations. This damper, provided with a casing linked to a first object and a rotating part linked to a second object rotatably attached to the first object, damps rotation in either the direction closing or the direction opening the second object, and is provided with a sensor which detects prescribed change in the external environment in the damper or around the damper, and a control unit which externally communicates, over a communication network, information relating to the change in the external environment detected by the sensor, wherein the sensor is configured from at least one of: a rotation sensor for detecting the number of revolutions of the rotating part: a sound sensor for detecting sound during rotations of the rotating part; a temperature sensor for detecting temperature; and a torque sensor for detecting torque on the basis of friction during rotation of the rotating part.