Abstract: A vibration isolation device can more effectively restrain vibration in the horizontal direction rather than in the vertical direction with a simple construction. In addition, vibration of a frequency of a machine mode caused by an internal structure of the vibration isolation device is reduced with a simple construction.

Abstract: A vibration isolator having an inner passage of a communication tube that communicates the negative pressure chamber with the valve chamber. A pipe connection part and a supply/discharge pipe communicate the valve chamber with the supply/discharge port of a switching valve on the outside of the vibration isolator. The switching valve selectively communicates the supply/discharge port to either an intake manifold as the negative pressure supply source, or an atmosphere space. The negative pressure chamber communicates with the valve chamber through the communication tube on the inner peripheral side of the outer cylinder member. Thus, either of a negative pressure and an atmospheric pressure, which is same as a pressure in the valve chamber, can be supplied into the negative pressure chamber, by supplying either of the negative pressure and the atmospheric pressure into the valve chamber through the supply/discharge pipe and the pipe connection part.

Abstract: The liquid seal type fluid-filled mount comprises a cup-shaped housing (1) having a flange (1A) provided with a mounting hole; a stud (3) disposed along a central axis of the cup-shaped housing so as to be positioned in a central opening of a fixed damping unit; a flexible seal cap (7) sealing fluid-tight between the upper end of the stud and the cup-shaped housing; a high viscosity liquid (2) for being filled in a chamber formed by the cup-shaped housing (1) and the flexible seal cap (7); a movable damping plate (4) mounted to a lower end of the stud (3); a fixed damping unit (10) being fixed between the flexible seal cap (7) and the movable damping plate (4) and placed in the high viscosity fluid; and a spring (13) disposed between a bottom of the cup-shaped housing (1) and the movable damping plate (4).

Abstract: A partitioning member 40 partitioning two liquid chambers 36A, 36B includes an orifice forming member 44, an elastic wall 46 configured to close an inner peripheral surface 44A thereof, and a pair of partitioning plates 48 and 50 which hold the elastic wall from both sides in an axial direction X. The pair of partitioning plates includes a holding portion 60 configured to hold the elastic wall 46 radially outward Ko of a coupling portion 56. The holding portion comprises a first holding portion 64 on the radially outside and a second holding portion 66 on the radially inside, and the first holding portion 64 is provided with a high-compression holding portion 68 having a compression ratio higher than that of the second holding portion 66. Accordingly, the abnormal sound is reduced while achieving both the damping performance in the low frequency range and the lowering of the dynamic spring constant in the high-frequency range without impairing the assembleability of the partitioning member.

Abstract: Disclosed herein is a smart vibration absorber for traffic signal supports. In exemplary embodiments, the vibration absorber utilizes the mass of the signal head as a damped vibration absorber. The system may also include a spring and damper in mechanical communication with the signal head. The spring provides resistance to the compression force of the signal head while the damper provides a damping force removing energy from the system. Also disclosed herein is a controllable damper which may be connected to a computing device for varying the damping of the system. The controllable damper may be a magneto-rheological fluid damper. The smart vibration absorber may be constructed as a retrofit for installation on current traffic signals supports.

Abstract: A fluid-elastomeric damper assembly operable for damping relative motion between a first structure and a second structure including a housing structure grounded to the first structure and a plurality of elastomer seals coupled to the housing structure, the housing structure and the plurality of elastomer seals defining a fluid-elastomeric chamber operable for containing a fluid. The fluid-elastomeric damper assembly also including one or more piston structures disposed within the housing structure and the fluid-elastomeric chamber, the one or more piston structures grounded to the first structure and driven by the second structure, and the one or more piston structures each including a first substantially fluid-filled chamber and a second substantially-fluid-filled chamber in communication via an orifice, the first substantially fluid-filled chamber and the second substantially fluid-filled chamber also in communication with the fluid-elastomeric chamber.

Abstract: A damper hole having a large-diameter section is formed inside a body which is made of metal. A flange which fits in the large-diameter section is formed in a damper which is made of rubber and is received in the damper hole. The flange defines a cushion chamber in the large-diameter section. A gap for letting air restrictively discharge from the cushion chamber is formed between an outer periphery of the flange and an inner periphery of the large-diameter section. Motion energy of a moving object colliding with the damper is absorbed by both elasticity produced by the compressed damper and an air cushion effect produced by the flange and the cushion chamber.

Abstract: A vibration isolator which is capable of stably opening and closing an orifice is provided at low manufacturing cost. A plunger for opening and closing an idle orifice is disposed in a manner that is slidably engaged with the inner wall surface of an orifice-forming member. A shaft portion extending downward is formed in the central portion of the plunger. A convex portion which is formed with a through-hole in which the shaft portion is slidably is provided on the bottom of the orifice-forming member so as to provide a bearing portion. The shaft portion of the plunger and the bearing portion of the orifice-forming member constitute a guide member for guiding the reciprocating motion of this plunger.

Abstract: A vehicle suspension mount (20) for connection of a first vehicle body—structure (22) with a second vehicle body structure (24). The mount including a suspension mount damping liquid damper pumper member (42).

Abstract: An engine mount of a vehicle may include a main rubber body defining a main liquid chamber, wherein a fastening bolt for assembling a vehicle engine is coupled to the main rubber body, an inner case supporting the main rubber body, and a housing enclosing the main rubber and the inner case, wherein at least a protrusion is formed on an outer circumference of the inner case, and wherein at least a groove is formed in the housing and the at least a protrusion of the inner case is coupled to the corresponding at least a groove of the housing.

Abstract: Vibration isolators are provided that include a shaft, a first bushing, a second bushing, a first outer annular member, a second outer annular member, a first elastomeric member, a second elastomeric member, and a shim. The first elastomeric member is adapted to provide a first stiffness for damping a first vibration, and the second elastomeric member is adapted to provide a second stiffness for damping a second vibration, the second stiffness being greater than the first stiffness.

Abstract: A damping device having a spring device and a telescopic device which is coupled to the spring device. The telescopic device has a plurality of telescopic elements which are coupled together in such a way that a predetermined damping force is generated when the telescopic elements are displaced relative to each other.

Abstract: An engine mount of a vehicle may include a main rubber body defining a main liquid chamber, wherein a fastening bolt for assembling a vehicle engine is coupled to the main rubber body, an inner case supporting the main rubber body, and a housing enclosing the main rubber and the inner case, wherein at least a protrusion is formed on an outer circumference of the inner case, and wherein at least a groove is formed in the housing and the at least a protrusion of the inner case is coupled to the corresponding at least a groove of the housing.

Abstract: An anti-vibration support system for an engine, comprising an active anti-vibration supporting device including an elastic member adapted to receive a vibration of the engine; a liquid chamber, wherein at least a portion of a wall surface of said liquid chamber is defined by said elastic member; a movable member adapted to change a volume of said liquid chamber; and an actuator that uses an electromagnetic force to drive said movable member, wherein the vibration of the engine is prevented from being transmitted to a vehicle body frame by controlling a supply of electric current to said actuator, and wherein operation of said active anti-vibration supporting device is prohibited when an abnormality in an operational state of the engine is detected.

Abstract: A shock absorbing line device preferably comprising at least two inner resilient components having different working lengths to provide progressive change in the tension developed by the device. The inner resilient components can be formed from one or more loops of shock cord. The use of an internal limiting member restricts the overall extension of the device.

Abstract: A liquid sealed vibration isolating device has an elastically movable diaphragm capable of preventing elastic deformation of a relief valve to realize high damping while preventing a cavitation phenomenon. The relief valve is provided in the elastic movable diaphragm arranged in a partition member in order to open and close a leak passage so as to prevent occurrence of the cavitation phenomenon. The relief valve is integrally formed with a fixing portion of the elastic movable diaphragm. There is provided an upwardly open concavity that the relief valve faces. The relief valve is made thicker and provided with an opening and closing adjustment groove at a basal portion of its inclined wall. The opening and closing adjustment groove is formed with a locally thin bending portion functioning as a starting point of bending in an opening and closing operation of the relief valve.

Abstract: Provided is a viscous fluid-sealed damper which helps to achieve an increase in degree of freedom in terms of the selection of the material of a sealing container, which can be produced with high production efficiency, and which helps to avoid leakage of the viscous fluid. A lid member is fixed to a container main body while compressing and holding a flange portion between a sealing member and the lid member, so an opening end of the container main body can be sealed with the lid member without having to effect fixation through fusion-bonding as in the prior art, and the degree of freedom in terms of material selection can be increased. Further, if the container main body is formed of a butyl rubber, the container main body can be fixed to the lid member without using any adhesive, so it is possible to achieve a reduction in production time and in cost. Further, it is possible to avoid leakage of the viscous fluid due to defective adhesion.

Abstract: A damping member includes a body provided between a device case and a module encased within the case and damping an external shock applied on the case. The body includes a holding member having upper and side surfaces and disposed between an inner peripheral surface of the case and an outer peripheral surface of the module, a first shock absorbing member covering a predetermined part of the upper and side surfaces of the holding member, deformed elastically when the shock is applied on the case, and elastically absorbing the shock, and a second shock absorbing member covering the other part of the holding member, getting the shock earlier than the first shock absorbing member when the shock is applied on the case, each changing its volume in accordance with the shock, and absorbing and escaping the shock. A damping structure used for an electronic device uses the damping member.

Abstract: The invention concerns a hydraulic decelerator with a fluid tank (28), in which a main piston (14) operates, and a compensation chamber (25), in which a compensation piston (15) operates. The fluid tank and the compensation chamber communicate by passing the fluid from one to the other in answer to the movements of the main piston in said tank, in a work direction under the control of a flow stop-adjustment member (12). The latter has a conical shank (22) that interacts with a cylindrical bore (31) provided in the main piston in an opposite direction through return conduits (32) also provided in the main piston associated with a one-way valve.

Abstract: A hydraulic engine mount assembly includes a support bracket defining a passageway that communicates between a pair of fluid chambers formed in an elastomeric body. According to one embodiment, the mount includes first and second connection devices for respectively connecting the engine mount to first and second connection surfaces.

Abstract: A dynamic damper containing a mass and an elastic connector is connected to an inner tube to provide the dynamic damper integrally as a part of an apparatus. Since the dynamic damper is integrally provided as part of the apparatus (cab mount) by connecting the dynamic damper containing the mass and the elastic connector to the inner tube via a connecting member in the cab mount, it is possible to eliminate work for assembling the dynamic damper separately from the cab mount. Further, the dynamic damper may be constructed integrally as part of the cab mount.

Abstract: A hydromount assembly includes a first fluid chamber and a second fluid chamber that communicate with one another through an inertia track. The inertia track is interposed between the first and second fluid chambers, and is used as a fluid actuating plunger to move relative to at least one of the first and second chambers in response to vibration to pump fluid from the first chamber to the second chamber, and vice versa, through the inertia track. An opening extends through the first and second fluid chambers and the inertia track and receives a shaft therein. The inertia track is secured to the shaft so that axial movement of the shaft results in axial movement of the inertia track. Elastomeric portions of the hydromount may be differently tuned from one another. The center mount hydromount may be selectively assembled with a body mount, or the body mount integrated into the hydromount whereby the center mount arrangement increases the functionality of the damper.

Abstract: A fluid-filled vibration damping device wherein a partition member is formed by fitting an inner orifice member inside an outer orifice member with the members relatively displaceable. An orifice-defining window is provided on either one of an inside peripheral face of the outer orifice member and an outside peripheral face of the inner orifice member. An orifice passage is defined utilizing a zone being produced through partial covering of the orifice-defining window by the other of the outer orifice member and the inner orifice member. The covered zone of the orifice-defining window changes through relative displacement of the inner orifice member and the outer orifice member, so that a passage length along the orifice passage changes in association with change of the covered zone of the orifice-defining window.

Abstract: An outer tube (11) of a vibration-damping device (10) is split into a first outer tube member (21) at a first end along the direction of an axis (O), and a second outer tube member (22) at a second end. The second end of the first outer tube member (21) in the direction of the axis (O), and the first end of the second outer tube member (22) in the direction of the axis (O) overlap each other in a radial direction of the outer tube (11) with the second rubber elastic body therebetween (23). Through this configuration, the generation of a noise from the vibration-damping device can be suppressed.

Abstract: This vibration isolating apparatus (1) includes a cylindrical first mounting component (6), a second mounting component (7), a rubber elastic body (8), a diaphragm (5), and a partitioning component (4). The partitioning component (4) is formed entirely from an elastic body, and on the first mounting component (6) there are provided a protruding portion (60) and a first cylindrical portion (62), and a toroidal rigid component (50) is fitted on an inner side of the first cylindrical portion (62), and in the rigid component (50) there are provided a second cylindrical portion (53) and a supporting portion (54).

Abstract: A two vacuum actuated switch mechanism is provided within an engine or hydromount. First and second ports are provided along a peripheral portion of an inertia track assembly. A decoupler or vacuum diaphragm is selectively exposed to vacuum through a first port. Under the influence of the vacuum, the decoupler can no longer oscillate. If vacuum is applied only to the decoupler, and not and idle diaphragm, the fluid is forced through a low frequency inertia track which creates high levels of damping and low frequencies. If vacuum is also applied to the decoupler and the idle diaphragm, the high frequency inertia track is opened and causes the fluid to flow therethrough. This creates a high frequency dynamic rate dip. Alternatively, if no vacuum is applied to either the decoupler or the idle diaphragm, the decoupler is allowed to freely oscillate creating a decoupled state for low input displacements. Higher input displacements results in fluids being forced through the low frequency inertia track.

Abstract: A fluid-filled type vibration damping device wherein a low-frequency orifice passage and at least one high-frequency orifice passage are formed in a partition member, which is supported by a second mounting member member; a valve body is disposed at least at one opening of the high-frequency orifice passage and is provided with a spring member that in a nonloaded state positions the valve body away from the opening of the high-frequency orifice passage to hold the high-frequency orifice passage in an open state; and, at times of vibration input, the valve body is adapted to block the high-frequency orifice passage in opposition to a holding force of the spring member.

Abstract: A mounting apparatus is provided for a data storage device. The mounting apparatus includes a mounting bracket receiving the data storage device, and a number of vibration absorbing members attached to opposite sides of the data storage device. Two sliding slots are respectively defined in opposite sidewalls of the mounting bracket. Each of the vibration absorbing members includes a fastener engaged with a corresponding side of the data storage device, a supporter slidably received in a corresponding sliding slot of the mounting bracket, and a damping body sandwiched between the fastener and the supporter.

Abstract: A fluid-filled type vibration damping device wherein a second mounting member is secured to a vehicle body; an opening of the second mounting member is closed off to define a pressure-receiving chamber a flexible film is arranged covering an outside of a main rubber elastic body to define an equilibrium chamber; a low-frequency orifice passage and a high-frequency orifice passage connect the pressure-receiving chamber and the equilibrium chamber a first moveable member is disposed on a fluid channel through the high-frequency orifice passage; the first moveable member being supported by a first support member that is linked to the second mounting member via the main rubber elastic body; and a fluid channel through the low-frequency orifice passage is situated away from the placement location of the first moveable member.

Abstract: An isolator. The novel isolator includes a first mounting structure, a second mounting structure, and a structure for providing a coupling path between the first and second mounting structures, this path having a series of zigzag patterns adapted to attenuate shock and/or vibration energy. The first mounting structure is attached to the shock source, and the second mounting structure is attached to the device to be isolated. In an illustrative embodiment, the isolator provides a path having a series of ninety-degree bends and a length greater than a direct distance between the first and second mounting structures. The path length and number of bends is tuned to provide a desired attenuation level. The dimensions of the isolator may also be tuned to provide a desired resonant frequency. In a preferred embodiment, the isolator is made from metal or some other material having stable properties over time.

Abstract: A fluid filled type vibration damping device includes a fluid chamber divided by a partition member into a pressure-receiving chamber and an equilibrium chamber. The partition member has a first and a second member axially superposed together. A locking projection is formed on one of the first member or the second member and a locking hole is formed on an other, with the locking projection being inserted through the locking hole to effect locking so as to constitute a locking mechanism for holding the first and second member in a superposed state. Outer circumferential faces of the first member and the second member held in the superposed state by the locking mechanism are fastened fitting into a second mounting member via a seal rubber layer, and the first or second member having the locking hole includes a cover portion that covers an opening of the locking hole from a side thereof to which the locking projection projects.

Abstract: A gas spring and damper assembly includes a damper and a gas spring. The damper includes a damper housing and a damper rod. The gas spring includes a first end member, a second end member and a flexible wall operatively connected therebetween. A friction-reducing element is operatively connected between the damper housing and the second end member. A sealing element is operatively disposed between the damper housing and the second end member such that a substantially fluid-tight seal is formed therebetween.

Abstract: The invention relates to a vibration isolator comprising a canister which ends are closed by end caps and a shaft able to move inside the canister, wherein the shaft comprises a piston-like shaped part for separating the canister in two parts: the first part being defined between the piston-like shaped part of the shaft and the first end cap, and comprising at least one resilient and damping element able to be compressed by a compression movement of the shaft on a first nominal stroke; the second part being defined between the piston-like shaped part of the shaft and the second end cap, and comprising at least one resilient and damping element able to be compressed by a tension movement of the shaft on a second nominal stroke; the tangential stiffness of the vibration isolator being, on at least one part of the first nominal stroke of the shaft, at least twice as lower as its tangential stiffness on the entire second nominal stroke of the shaft.

Abstract: An equipment engine mounting system/method for mounting an equipment engine to an equipment frame. The equipment engine mounting system includes a first engine mount disposed between the equipment engine and the equipment frame, including a first engine mount nonextensible inner member having an outer bonding surface. The first engine mount including a first engine mount nonextensible outer member, the first engine mount nonextensible outer member having an inner bonding surface. The first engine mount includes an intermediate elastomer between the first engine mount nonextensible inner member and the first engine mount nonextensible outer member, the first engine mount intermediate elastomer bonded to the first engine mount nonextensible inner member outer bonding surface and the first engine mount nonextensible outer member inner bonding surface.

Abstract: An improved hydraulic engine mount includes a main rubber element of one piece construction. The main rubber element includes an upper portion, an intermediate portion, and a lower portion. The lower portion includes an interlocking seal portion. The hydraulic engine mount includes an upper housing and a lower housing. The interlocking seal portion includes an upper protrusion operable to fit within an upper groove of the upper housing to fit together to form a tight locking seal. The upper housing further includes an upper protrusion operable to connect to an upper groove of the main rubber element. The upper groove of the main rubber element is annular and extends around the lower portion of the main rubber element. The lower portion of the main rubber element further includes a generally axially extending second protrusion abutting both the upper housing and the lower housing.

Abstract: A vibration isolator is disclosed having a housing which defines a fluid chamber. A piston, which is movable to and from a down position, is disposed within the housing. A vibration isolation fluid is disposed within the fluid chamber. A passage having a predetermined diameter extends through the piston to permit the vibration isolation fluid to flow from one fluid chamber to the other. An elastic element is provided for reducing transmission of vibrations from the piston to the housing when the piston is at the down position.

Abstract: A vehicular fluid sealed engine mount 10 includes a first mount member 11 to be mounted on an engine EG, a second mount member 12 to be mounted on a body BD, a resilient member 13 which connects between the first and second mount members, a diaphragm 14 fixed to the second mount member far away from the resilient member, a fluid chamber 15 defined by the resilient member and the diaphragm and a partition member 18 fixed to the second mount member in such a manner as to partition the fluid chamber into a main fluid chamber 16 and an auxiliary fluid chamber 17. The second mount member and the partition member have brittle portions 45, 46 which are deformed or broken when a load En is applied thereto from a direction which intersects with an axial direction of the vehicular fluid sealed engine mount at right angles.

Abstract: Provided is a container body including a flexible portion made of a rubber-like elastic material and an annular connection portion made of a hard material in the shape of a substantially flat plate and having an upper surface to which the flexible portion is firmly fixed and a lower surface to which the lid body is firmly fixed. The flexible portion is provided, on a firm fixation region thereof that is firmly fixed to the annular connection portion, with a collar joint portion protruding widely in the direction of a plane of the annular connection portion. Therefore, the container body and the lid body are firmly coupled to each other, and the viscous fluid-filled damper can be reduced in height.

Abstract: An easily serviced spring mounting base assembly for use with heavy vibratory equipment such as might be used in mined minerals segregation. The base plate having a plurality of spring openings, a compression spring below each of the spring openings, the individual compression springs supported by a single foundation and individual cover plates sized to cover the required spring openings; the spring openings sized so that the compression spring diameter is allowed to pass through. The cover plates and base plate having a plurality of aligned holes to receive bolts such that tightening the bolts compresses the spring between the cover plate and the foundation, and secures the cover plate to the base plate.

Abstract: A liquid (L) sealed in a first mounting member (11) of an anti-vibration apparatus (10) contains a first liquid and a second liquid that are mutually insoluble, the second liquid having a higher vapor pressure and a lower weight percentage (weight %) included in the liquid than those of the first liquid. In the anti-vibration apparatus, the size of a generated abnormal noise can be reduced without complicating the structure and deteriorating a damping performance.

Abstract: A vibration isolator which is capable of stably opening and closing an orifice is provided at low manufacturing cost. A plunger for opening and closing an idle orifice is disposed in a manner that is slidably engaged with the inner wall surface of an orifice-forming member. A shaft portion extending downward is formed in the central portion of the plunger. A convex portion which is formed with a through-hole in which the shaft portion is slidably is provided on the bottom of the orifice-forming member so as to provide a bearing portion. The shaft portion of the plunger and the bearing portion of the orifice-forming member constitute a guide member for guiding the reciprocating motion of this plunger.

Abstract: A fluid filled vibration damping device including an elastic body connecting a first and second mounting member, a pressure-receiving chamber defined by the elastic body and an equilibrium chamber defined by a flexible rubber film. The second mounting member is press fitted into a tubular holder member having an annular holding portion integrally formed at its lower end projecting radially inwardly. A cover plate member having an outside diameter smaller than an inside diameter of the holder member is disposed within the holder member with an outer peripheral portion is fixedly clamped by the second mounting member and the annular holding portion. A sealing rubber is disposed for fluid-tightly closing a gap formed between the clamped portion so that an tightly closed air chamber defined by the cover plate member is formed on a back side of the flexible rubber film.

Abstract: An exemplary shock-absorbing device for a boarding bridge is for use with lift columns that support the boarding bridge tunnel. The device comprises a first transverse support coupled to the bottom of said lift columns, having an extended length in the transverse direction. A second transverse support is installed separately below the first transverse support. An elastic member is coupled between the first and second transverse supports to elastically support said first transverse supports. Dampers are coupled between the first and second transverse supports to absorb residual vibration from said elastic member. First and second driveshafts are coupled to fixed positions on opposite sides of the second transverse support to be able to rotate. A drive mechanism generates a motive force to move said tunnel and is equipped with a plurality of wheels on opposite sides of said first driveshaft and a plurality of wheels on opposite sides of said second driveshaft.

Abstract: A liquid-filled vibration isolator has a first orifice channel providing communication between a pressure receiving chamber and a balancing chamber. One of the pressure receiving chamber and the balancing chamber is communicated via a second orifice channel with an intermediate liquid chamber. The second orifice channel has a shorter distance or a larger cross-sectional area than the first orifice channel. An elastic film member, such as a membrane, separates the intermediate liquid chamber and the other of the pressure receiving chamber and the balancing chamber from each other. A communicating hole of a predetermined size is formed in the elastic film member. An imaginary orifice channel combined from the two orifice channels provides a high damping effect on input vibration of relatively low frequency. As the vibration frequency increases, a gradual transition is made to the damping characteristic of the second orifice channel only.

Abstract: A vibration isolator (10) enabling simplification of a passage structure for connecting a negative pressure chamber in which a membrane is used as a partition wall and a valve chamber of a valve mechanism for opening and closing a second restriction passage to an operating pressure supply source, and simplification of connection of the negative pressure chamber and the valve chamber of the valve mechanism to the operating pressure supply source. The inner passage (63) of a communication tube (62) on the inner peripheral side of an outer cylinder member (20) communicates the negative pressure chamber (60) with the valve chamber (102). A pipe connection part (106) and a supply/discharge pipe (110) communicate the valve chamber (102) with the supply/discharge port (114) of a switching valve (112) on the outside of the vibration isolator (10).

Abstract: A vibration isolator which is capable of stably opening and closing an orifice is provided at low manufacturing cost. A plunger for opening and closing an idle orifice is disposed in a manner that is slidably engaged with the inner wall surface of an orifice-forming member. A shaft portion extending downward is formed in the central portion of the plunger. A convex portion which is formed with a through-hole in which the shaft portion is slidably is provided on the bottom of the orifice-forming member so as to provide a bearing portion. The shaft portion of the plunger and the bearing portion of the orifice-forming member constitute a guide member for guiding the reciprocating motion of this plunger.

Abstract: A fluid-filled vibration damping device including: a pressure-receiving chamber and an equilibrium chamber disposed on either side of a partition plate, while being connected through a first orifice passage; a moveable film arranged to either a pressure-receiving chamber side or an equilibrium chamber side of the partition plate while being spaced away therefrom to define therebetween an intermediate chamber; a second orifice passage connecting the intermediate chamber and one of the pressure-receiving and the equilibrium chambers while being tuned to higher frequency than the first orifice passage; and a flow straightening plate arranged in opposition to the moveable film at least at one of the intermediate chamber side and an opposite side thereof, the flow straightening plate having a plurality of flow straightening apertures opening towards the moveable film and furnished with a flow limiting member.

Abstract: A fluid-filled cylindrical vibration-damping device including a rubber elastic body elastically interconnecting an inner shaft member and an intermediate sleeve, having a first pocket and a second pocket closed by an outer tube member thereby defining a pressure receiving chamber and an equilibrium chamber respectively. Annular sealing portions are provided at axially opposite ends between the intermediate sleeve and the outer tube member. A circumferential groove extends in a circumferential direction between an axial edge of the second pocket and the annular sealing portion in an axial direction, being closed by the outer tube member to provide an orifice passage. One end of the orifice passage circumferentially opens to the pressure receiving chamber while another end circumferentially opens to the equilibrium chamber such that an axial inside dimension of the second pocket is expanded compared to that of an orifice-passage-formation part at a side of opening of the orifice passage.

Abstract: A connecting bearing for elastic connection between at least two elements. The connecting bearing includes a first fastening device and a second fastening device. The first fastening device and second fastening device are each mechanically coupled by a elastomer means. The elastomer means is constructed and used as a vibration insulator.

Abstract: A fluid-filled type engine mount having a pressure receiving chamber and an equilibrium chamber connected together through a first orifice passage, and an intermediate chamber connected to the equilibrium chamber through a second orifice passage. The intermediate chamber is partially defined by a movable film, and the pressure-receiving chamber and the intermediate chamber are situated to either side of the movable film. The movable film is a tabular rubber elastic body, and is imparted with non-linear spring properties in response to elastic deformation in a width direction thereof so that its deformation during input of idling vibration occurs in a low spring properties zone, whereas its deformation during input of vibration of greater amplitude than the idling vibration in a higher frequency range than a resonance frequency of the first orifice passage reaches a high spring properties zone.