Provided is an active engine mount having a vent hole that includes a damper assembly including an exciter. The damper assembly in the active engine mount which controls pressure of a main chamber as the exciter is excited has a vent hole that enables communication from a lower part of the exciter to the outside formed thereon such that air inside the damper assembly can be discharged to the outside.

An elevator system includes a hoistway, the hoistway having a plurality of landing floors each landing floor having a landing floor door. One or more guide rails are located in the hoistway to guide one or more elevator system components along the hoistway. An absorber is located at a hoistway pit and is supportive of a guide rail of the one or more guide rails. The absorber is configured to absorb loads imparted to the guide rail due to vertical translation and/or compression of the hoistway. A method of supporting a guide rail of an elevator system includes locating an absorber in an elevator hoistway in operable communication with a guide rail of an elevator system. Vertically-acting loads are transmitted from the guide rail to the absorber via the absorber piston thereby increasing a fluid pressure in the housing chamber.

Provided is an active engine mount having a vent hole that includes a damper assembly including an exciter. The damper assembly in the active engine mount which controls pressure of a main chamber as the exciter is excited has a vent hole that enables communication from a lower part of the exciter to the outside formed thereon such that air inside the damper assembly can be discharged to the outside.

A system or structure subject to external mechanical dynamic loading excitations propagated within the system or structure comprising a fluid filled structure and a fluid volume operable to facilitate fluid flow about at least part of the structure. Excitations within the structure can be propagated throughout. The system can further comprise a tuned mass damper (TMD) located within the fluid volume. The TMD can leverage the viscous properties of the fluid to attenuate the excitations within the structure. The TMD can comprise a mass and a spring operably connected to the mass. The TMD can further comprise a fluid resistance facilitating fluid flow about the mass and the spring for damping and a secondary tuning feature operably connected to at least one of the mass and the spring and the supporting fluid-filled structure.

A system or structure subject to external mechanical dynamic loading excitations propagated within the system or structure comprising a fluid filled structure and a fluid volume operable to facilitate fluid flow about at least part of the structure. Excitations within the structure can be propagated throughout. The system can further comprise a tuned mass damper (TMD) located within the fluid volume. The TMD can leverage the viscous properties of the fluid to attenuate the excitations within the structure. The TMD can comprise a mass and a spring operably connected to the mass. The TMD can further comprise a fluid resistance facilitating fluid flow about the mass and the spring for damping and a secondary tuning feature operably connected to at least one of the mass and the spring and the supporting fluid-filled structure.

A front fork includes a fork main body, a damper cartridge, and a closing member. The damper cartridge includes a cylinder, a piston mounted on a piston rod, and a rod guide which guides the piston rod and to which a fluid filling port that allows the outside of the cylinder to communicate with the fluid chamber is provided. The closing member is provided on the rod guide and closes the fluid filling port.

An anti-vibration device (1) includes a tubular first attachment member (10), a second attachment member (20), an elastic body (70), and a separating member (50) that separates a liquid chamber in the first attachment member into a main liquid chamber (80) and a secondary liquid chamber (90). A tapered surface (502) decreasing in diameter towards another side in the axial direction is formed on an end on the other side in the axial direction of an outer circumferential surface of the separating member, a bend portion (101) bent to follow the tapered surface is formed on an end on the other side in the axial direction of the first attachment member, and an end (301) on the outer circumferential side of a diaphragm (30) is sandwiched between the tapered surface and the bend portion.

The present invention relates to a drive device and a method of controlling the drive device. The drive device according to the invention includes a first member, a second member, an electric actuator, and a damper. The damper is configured to drive in an enabled mode and a disabled mode, the enabled mode enables a function of mitigating an impact load applied to either one of the first member and the second member, and the disabled mode disables the function of mitigating an impact load applied to either one of the first member and the second member.

Motor vehicle vibration damper with at least one damper cylinder at least partially filled with a liquid damping medium; a piston rod axially movable to the longitudinal extension axis (L) of the damper and sections of which project into the damper cylinder; a piston rod guide surrounding the piston rod in the peripheral direction and seals off the damper cylinder; a gas-impermeable, shape-changing gas pressure container located in a compensation chamber inside the damper cylinder; a filling channel connecting the interior of the gas pressure container to the external environment; and a non-return valve at least indirectly connected to the gas pressure container and closes or opens the filling channel depending on gas pressure difference. The non-return valve is inside a gas-impermeable non-return valve housing connected to the piston rod guide.

A damping system is provided including at least one fluid damper including a damping volume containing a damping fluid, and a fluid reservoir including a reservoir piston partitioning an inner volume of the fluid reservoir into a damping chamber containing the damping fluid and a recoil chamber containing a recoil fluid. The damping volume of the at least one fluid damper is connected to the damping chamber of the fluid reservoir in a fluid-conducting manner. The reservoir piston is movable in a compression direction increasing a volume of the damping chamber and decreasing a volume of the recoil chamber. The reservoir piston is movable in a dilatation direction decreasing the volume of the damping chamber and increasing the volume of the recoil chamber. The reservoir piston includes a damping chamber surface facing the damping chamber and a recoil chamber surface facing the recoil chamber.