Abstract: Mounted between bottom and top surfaces of a case are: second buffer materials and first buffer materials brought in surface contact with a bottom surface of a hard disk drive (HDD) via an insulating member, and upper buffer materials brought in surface contact with the opposite side of the HDD via the insulating member. When impact F2 is applied to the HDD, the second buffer materials contract from a thickness of T0 to T2, and the first buffer materials buckle. Buckling parts of the first buffer materials buckle when the second buffer materials contract to thickness T2, and can achieve impact-lessening independently from the second buffer materials. The second buffer materials contract singly from T0 to equal T1 to or more than T2, whereas the first buffer materials and second buffer materials both act at thickness T2 or beyond. Therefore, impact-lessening can be achieved in a broad range.

Abstract: A shock absorber includes a cylinder, a first buffering assembly, a second buffering assembly, and oil. The cylinder includes a separating portion protruding from an inner sidewall. The cylinder defines a first chamber and a second chamber positioned at opposite sides of the separating portion. The separating portion defines a through hole communicating between the first chamber and the second chamber. The first buffering assembly includes a piston rod received in the first chamber, and a first movable piston sleeved on the piston rod. The second buffering assembly includes a second movable piston received in the second chamber adjacent to the separating portion, a stabling piston received in the second chamber, and an elastic member received in the second chamber. The elastic member is positioned between the second movable piston and the stabling piston. Oil is filled between the first movable piston and the second movable piston.

Abstract: A vibration damping device including a main rubber elastic body elastically connecting a second mounting member and a first mounting member being arranged on axially one side of the second mounting member and a cylindrical outer bracket fit onto the second mounting member. A stopper portion integrally formed with the outer bracket extends radially inwardly to provide a first pressure receiving portion. A bound stopper member that restricts mutually approaching displacement of the two mounting members in the axial direction is constituted by including the first pressure receiving portion. A cylindrical second pressure receiving portion in a dual structure is formed by having the first pressure receiving portion extend axially inwardly and then folded axially outwardly. An axis perpendicular stopper member that restricts relative displacement of the two mounting members in the axis perpendicular direction is constituted by including the second pressure receiving portion.

Abstract: The present invention provides a tubular vibration-damping mount capable of securing durability against an input in a direction perpendicular to an axis. A tubular vibration-damping mount comprises a core member, a tubular member, a rubber member, an upper surface of which has, as viewed in a cross section including an axis of the core member, a recessed portion in a radially inner direction of the rubber member and an inclined portion whose inclination angle is smoothly and upwardly increased in the radially inner direction from a point on the tubular member as a starting point, and a bracket, wherein the tubular member has, in an area higher than a lower end of an adhesion surface between the tubular member and the rubber member and the upper surface of the rubber member starts from a point on the inner periphery of the diameter-enlarged portion of the tubular member, which the point agrees with the starting point.

Abstract: A method of manufacturing a bushing assembly that includes a vibration damping rubber bushing having a round cylindrical resin outer cylinder, which is assembled by press fitting an outside peripheral face of the outer cylinder in an axial direction into a cylindrical metal mated component having a circular inside peripheral face. The vibration damping rubber bushing is press fit into the mated component with a rigid powder composed of material harder than the outer cylinder deposited in a section of the resin outer cylinder that is situated on the outside peripheral face and that mates with the inside peripheral face of the mated component, and the outer cylinder and the mated component are assembled in a mated condition such that the rigid powder intervenes between the outside peripheral face of the outer cylinder and the inside peripheral face of the mated component.

Abstract: A fluid-filled type vibration damping device including a partition member having a moveable film and a short passage interconnecting a pressure receiving chamber and an equilibrium chamber. A valve member that switches between a communicating state and a shut off state of the short passage projects from the moveable film. The valve member has a thick walled part and a thin walled part, the thin walled part being pressed on an inner wall surface of the short passage. A pressure of the pressure receiving chamber is applied through the short passage to a pressure receiving chamber side surface of the thick walled part, while an equilibrium chamber side surface thereof is supported by the partition member. The pressure of the pressure receiving chamber is applied to one side of the thin walled part and a pressure of the equilibrium chamber is applied to another side thereof through the short passage.

Abstract: In a liquid-sealed type vibration isolator having a first orifice flow channel 56 and a second orifice flow channel 60, a valve member 66 formed of a rubber elastomeric membrane for opening and closing the second orifice flow channel 60 is provided on a partitioning member 40 so as to be orthogonal to the direction of flow in the second orifice flow channel. The valve member is held at the outer peripheral portion thereof by a wall surface of a valve housing chamber 68, and includes inside the outer peripheral portion thereof a membrane portion 66B which is subjected to the flexural deformation by the liquid flow in the second orifice flow channel to close openings 60C and 60D of the second orifice flow channel. Communicating holes 76 which bring the second orifice flow channel into communication are provided at positions not overlapped with the opening of the membrane portion 66B. Accordingly, the switching of characteristics is enabled with an inexpensive structure.

Abstract: An assembly includes a chassis coupled to a mounting surface via a mounting system. The mounting system includes a bolt, a dashpot, and a spring. The dashpot and the spring are configured to reduce vibration forces transferred from the mounting surface to the chassis. Techniques for forming the assembly are also described.

Abstract: In a so-called motoring state at the time of engine starting before actuating engine, there is a problem that a roll vibration, which is generated when an engine revolution speed Ne is at a predetermined engine revolution speed and vibrates the engine and the vehicle body largely, can not be suppressed. For this reason, the present invention provides an active vibration isolating support apparatus in which the roll vibration can be suppressed in the motoring state at the time of engine starting.

Abstract: Disclosed herein is a hydraulic mount for a vehicle, wherein a serpentine wall that protrudes from a bottom surface of a membrane wherein the membrane operates as a bottom surface of the upper chamber, is bonded to an orifice lower plate and separates a central chamber and a serpentine inertia track. Furthermore, the serpentine inertia track is disposed along a circumference of the central chamber. The hydraulic mount additionally includes a plurality of orifice apertures that are formed in the orifice lower plate and configured to allow communication between the central chamber and the lower chamber.

Abstract: A partitioning member partitioning two liquid chambers includes an orifice forming member, an elastic wall configured to close an inner peripheral surface thereof, and a pair of partitioning plates which hold the elastic wall from both sides in an axial direction X The pair of partitioning plates includes a holding portion configured to hold the elastic wall radially outward Ko of a coupling portion. The holding portion comprises a first holding portion on the radially outside and a second holding portion on the radially inside, and the first holding portion is provided with a high-compression holding portion having a compression ratio higher than that of the second holding portion. 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: A partition element 40 which partitions a first liquid chamber 36A and a second liquid chamber 36B is constituted of an annular orifice forming member 44, an elastic wall which blocks a space formed within an inner peripheral wall 44A, and a pair of partition plates 48, 50 which sandwiches the elastic wall. A through hole 74 is formed in an elastic wall portion of the elastic wall 46 which is sandwiched by the partition plates 48, 50. Gaps 78 which are connected with the through hole 74 are formed between wall surfaces of the elastic wall 46 and plate surfaces of the partition plates 48, 50, and a first liquid chamber 36A and a second liquid chamber 36B are connected with each other by way of the through hole 74 and the gaps 78 in a state where a liquid is allowed to flow between these liquid chambers when the partition plates 48, 50 are at a neutral position, and the through hole 74 is blocked by partition plates 48, 50 due to the displacement of the partition plates 48, 50.

Abstract: An engine mount structure includes: an engine bracket 1 mounted to an engine; and an anti-vibration device 2 having an outer tube 7 fixed to a vehicle body, an inner tube 6 to which a front end portion of the engine bracket is inserted and fitted, and a rubber elastic body 8 interposed between the outer tube and the inner tube, wherein an engine bracket insertion hole 9 provided to the inner tube is offset from the center L of a mounting portion of the inner tube mounted to the rubber elastic body, toward the engine bracket. Accordingly, the bracket extending from the engine is allowed to have a natural frequency departing as much as possible from a natural frequency of the engine, and simultaneously, a reduction in weight can be achieved.

Abstract: A reduced noise decoupler has a perimeter with a wavy form. This provides a significant reduction in the initial contact noise. Hydraulic pressure deforms the wavy edges, pressing the wavy edge flat and creating the necessary seal. The edge geometry is created such that pressure will flatten the decoupler perimeter without creasing, ensuring a proper seal without losses. This is achieved by drawing the wavy detail from the perimeter to an interior of the decoupler body in alternating fashion to create a pattern of peaks and troughs bounded by thicker sections, allowing the edges to easily deform without creasing.

Abstract: An air damping mount includes: a housing in which a space is formed and an upper part of which is shielded by a cover; an insulator embedded in the housing forming first and second chambers at a lower and upper parts, respectively, and elastically deformed in accordance to the load applied thereto; and a core coupled to the insulator embedded in the housing and coupled to an engine through a hanger bracket protruding externally to a side direction of the housing wherein a first air hole is punched for air to enter into and exit from the first chamber and a second air hole is punched for air to enter into and exit from the second chamber. The chambers which air enter into and exit from are formed at an upper part and a lower part of the housing to improve noise, vibration and harshness (NVH).

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: An excellent liquid-filled vibration damping device is provided, which is capable of effectively suppressing cavitation, which may otherwise cause abnormal noises, without impairing a vibration damping effect. The inventive liquid-filled vibration damping device includes a liquid-filled space partitioned into a primary liquid chamber and a secondary liquid chamber communicating with each other through an orifice, a molded vulcanized rubber member which defines at least a part of the liquid-filled space, and a first retention member and a second retention member retaining the molded vulcanized rubber member. Liquid (P) to be sealingly contained in the liquid-filled space comprises a polar organic solvent as a major component, and not less than 0.2 cm3 of a gas per 1 cm3 of the liquid as measured at an ordinary temperature at an atmospheric pressure is dissolved in the liquid.

Abstract: A fluid filled type vibration damping device including: an obstructing rubber elastic plate disposed so as to obstruct a communication aperture that connects a pressure receiving chamber and an equilibrium chamber; contact retaining portions arranged on an outer peripheral edge of the rubber plate and held in contact against a partition member; an elastic deformation zone arranged circumferentially between the contact retaining portions of the rubber plate so as to undergo elastic deformation on a basis of pressure differential between the pressure receiving chamber and the equilibrium chamber to be spaced away from the partition member to cause the aperture to open up; and a non-linearizing member provided such that the elastic characteristics of the elastic deformation zone become more rigid in a non-linear manner in association with increase in an amount of its deformation.

Abstract: A roll-rod for a vehicle includes an inner pipe protruding from an end surface of a roll-rod body which penetrates an insulator engaged to a bracket and an end plate may be coupled to a rear side of the inner pipe, a fastening bolt being mounted to fasten the end plate to the inner pipe, wherein the insulator has a supporter inserted into a through-hole formed in the bracket and having a pipe shape, and a first front stopper extended from the supporter and protruding to the front of the bracket, and a first rear stopper extended from the supporter and protruding to the rear of the bracket, wherein the first front stopper, the first rear stopper and the supporter may be integrally molded to be fixedly coupled to the bracket.

Abstract: A fluid filled vibration damping device including: a first mounting member; a second mounting member having a cylindrical portion; and a main rubber elastic body elastically connecting the first and second mounting members. The first mounting member is fixed to one end of the main rubber elastic body, and an insertion metal fitting in a cylindrical shape is fixed onto an outer peripheral face of another end thereof, and the cylindrical portion of the second mounting member is bonded by pressure to the insertion metal fitting with a sealing rubber in between in a fluid-tight manner. The insertion metal fitting is provided with an inward protrusion where part of a wall portion protrudes inward. A sealing rubber storage space is formed between the inward protrusion and the cylindrical portion of the second mounting member.

Abstract: A mechanism to act as a buffer, the mechanism includes a base seat defining a chamber and a bottom hole communicating with the chamber; a connecting shaft received in the chamber and extending through the bottom hole, the connecting shaft including a blocking portion for preventing detachment from the base seat, the connecting shaft axially defining a receiving hole and a plurality of mounting holes communicating with the receiving hole; a guiding rod fixed to the base seat, one end of the guiding rod extending out of the base seat and an inserting portion at the other end, the inserting portion including an abutting surface tapered toward the distal end; a buffer sleeved on the connecting shaft; a plurality of rolling bodies in the mounting holes and providing resistance between the abutting surface and the buffer; and a resilient member between the guiding rod and the blocking portion.

Abstract: A switchable mount includes a partition wall which partitions a working chamber from a compensating chamber. A first diaphragm is arranged in the partition wall so as to be deflectable in the longitudinal direction of the mount. A switching actuator controls the diaphragm and, in a first state thereof, the diaphragm is fixed in a rest position and, in a second state thereof, the diaphragm is released to move in the longitudinal direction of the mount. A second diaphragm is arranged in the partition wall and is deflected in the longitudinal direction of the mount to influence the volume of the working chamber. An air chamber is arranged between the first diaphragm and the second diaphragm. In the first state of the actuator, the air chamber is closed off air-tight to the atmosphere and, in the second current-conducting state of the actuator, is connected to the atmosphere.

Abstract: A dual frequency damper includes a liquid inertia vibration eliminator (LIVE) portion and a fluid damper portion. LIVE portion and fluid damper portion operate in series and function so that dual frequency damper is optimized in both stiffness and damping at multiple frequencies. LIVE portion acts as a frequency dependent switch to selectively cause low frequency oscillatory forces to be treated primarily by the high spring rate and high damping rate characteristics of the fluid damper portion, and also to select high frequency oscillatory forces to be primarily treated by the low spring rate and low damping rate characteristics of the LIVE unit portion.

Abstract: A hydraulic damping mount has a working chamber and a compensating chamber, which are filled with a hydraulic liquid and separated from each other by an intermediate plate. The working chamber and the compensating chamber are connected to each other via a transfer passage and a bypass channel. The bypass channel can be opened or closed by an actuator. The actuator is configured as a one-piece elastomer part, which has a fastening portion on the edge and an actuating element, which is connected to the fastening portion via a flexible connecting portion.

Abstract: A snubber for reducing shock and vibration in down hole tools includes a housing having an axis and a chamber. A piston is mounted in the chamber for axial movement therein. The piston includes a shaft extending therefrom to an exterior of the housing. An axial spring element is mounted between the piston and the housing. Both the piston and the chamber include non-cylindrical portions.

Abstract: A hydraulic shimmy damper that resolves drawbacks in several known shimmy dampers, such as damping characteristics that are dependent on oil temperature variations. The disclosed shimmy damper includes a hydraulic compensator (40) having an internal fluid volume that is significantly more important than a fluid volume expelled from the body of the shimmy damper when its piston moves fore and aft. The shimmy damper also includes a hydraulic manifold (30) arranged between the body and the hydraulic compensator and defining a transfer channel between chambers in the piston that is connected to the hydraulic compensator. The manifold receives interchangeable hydraulic cartridge-type valves (CV1,RV1;CV2,RV2) for metering the fluid flowing from the chambers to the transfer channel, and allows the fluid to freely enter the chambers from the transfer channel. The present shimmy damper is therefore much less sensitive to oil temperature variation under intense shimmy.

Abstract: The present invention is an anti-vibration device (1) that includes: a first mounting component (2) that is cylindrically-shaped and joined to one of a vibration generating portion and a vibration receiving portion; a second mounting component (3) that is joined to the other one of the vibration generating portion and the vibration receiving portion; a first elastic body (4) that elastically joins the first mounting component (2) and the second mounting component (3) together; a fluid chamber (5) that is provided inside the first mounting component (2) and inside which a fluid is sealed; a first partitioning wall (10) that divides the fluid chamber (5) in an axial direction so as to define a main fluid chamber (8), a portion of wall surfaces of which is the first elastic body, and an auxiliary fluid chamber; a second partitioning wall (12) that divides the main fluid chamber (8) in a circumferential direction so as to define a plurality of divided main fluid chambers (11); and a plurality of restricting passa

Abstract: Provided is a fluid-filled vibration damping rubber device, including enclosed spaces (primary fluid chamber and auxiliary fluid chamber) formed by chamber walls (vibration damping rubber body and rubber membrane) which deform in accordance with vibration input, the enclosed spaces being filled with a fluid, in which: the chamber walls each include a diene-based rubber; and the fluid includes a glycol-based solution containing a benzotriazole-based compound having an amine group. The fluid-filled vibration damping rubber device is capable of eliminating the degradation of the chamber walls (rubber bodies) and the deterioration of its durability due to the dissolution of components in the rubber bodies into the filling fluid.

Abstract: To form a relief valve for preventing the generation of the cavitation phenomenon into a simple and accurately operable structure, there are provided a central thin wall portion and a fixing portion in an elastic diaphragm provided in the partition member to have the fixing portion fixed in position. A relief valve is integrally formed with an outer peripheral portion of the fixing portion. The relief valve is provided with an inclined surface formed on the side of a secondary liquid chamber and a recessed portion opened on the side of a primary liquid chamber and has a difference in rigidity in the circumferential direction. When the primary liquid chamber turns negative pressure, a hydraulic liquid in the secondary liquid chamber opens the relief valve and leaks to the primary liquid chamber so as to prevent the generation of the cavitation phenomenon.

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 partitioning wall is integrally formed to a rubber elastic body, partitioning second main liquid chambers. An upper outer peripheral member and a lower outer peripheral member are positioned in the axial direction by a partitioning wall positioning member disposed in the second main liquid chambers. The partitioning wall is retained to the peripheral inside of a retaining member in an axial direction (S) compressed state.

Abstract: Antivibration rubber device provided between a vibration source and a vehicle body is provided with: a first mounting member (11) which is mounted to the vibration source side; an elastic member (13) which is in close contact with a surface of the first mounting member (11) and has a step formed at the end part on the vibration source side; and a second mounting member (12) which is integrally connected to the vehicle body side, thereby suppressing occurrence of a crack in the elastic member of the antivibration rubber device and improving durability enabling long-term use.

Abstract: A vibration isolator includes an upper housing and a lower housing; an upper reservoir housing defining a upper fluid chamber; a lower reservoir housing defining a lower fluid chamber; a piston spindle resiliently coupled to the upper housing with an upper elastomer member, the piston spindle being resiliently coupled to the lower housing with a lower elastomer member; an elongated portion having a tuning passage; and a tuning fluid disposed there within. The vibration isolator cancels vibratory forces at an isolation frequency. The vibration isolator is utilized in a pylon system for mounting a transmission in an aircraft. The vibration isolator is located between a pylon structure and a roof structure. The isolator includes a spherical bearing assembly that is located near a waterline location of a rotational axis of a drive shaft.

Abstract: A fluid filled type vibration damping device including: a partition member having a communication passage connecting a pressure receiving and equilibrium chambers; an obstructing rubber elastic plate juxtaposed against the communication passage from a pressure receiving chamber side, adapted to obstruct the communication passage, and arranged to be exposed to pressure of the pressure receiving and the equilibrium chamber at both faces; and a constraining member provided for retaining an outer peripheral section of the obstructing rubber elastic plate in contact against the partition member at multiple locations. The constraining member provides an opening/closing control member operated to induce the obstructing rubber elastic plate to push against the partition member and close off the communication passage, and to induce elastic deformation of the obstructing rubber elastic plate to be separated from the partition member.

Abstract: A fluid filled type vibration damping device including an elastic rubber body elastically connecting an inner shaft member and an outer tube member. The elastic rubber body has a solid rubber wall that includes inside face recesses and outside face recesses respectively formed to either side of the inner shaft member in an axis-perpendicular direction so that a pair of thin portions and a pair of thick portions respectively situated in opposition along mutually orthogonal axes lying in axis-perpendicular directions are formed in the solid rubber wall. A deepest part of the inside face recesses is situated towards an axial small diameter side of the solid rubber wall with respect to an deepest part of the outside face recesses, with the inside face recesses and the outside face recesses overlapping one another in the axis-perpendicular direction of the solid rubber wall.

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: A vibration damping device including a main rubber elastic body elastically connecting a second mounting member and a first mounting member being arranged on axially one side of the second mounting member and a cylindrical outer bracket fit onto the second mounting member. A stopper portion integrally formed with the outer bracket extends radially inwardly to provide a first pressure receiving portion. A bound stopper member that restricts mutually approaching displacement of the two mounting members in the axial direction is constituted by including the first pressure receiving portion. A cylindrical second pressure receiving portion in a dual structure is formed by having the first pressure receiving portion extend axially inwardly and then folded axially outwardly. An axis perpendicular stopper member that restricts relative displacement of the two mounting members in the axis perpendicular direction is constituted by including the second pressure receiving portion.

Abstract: A vibration isolator includes an upper housing and a lower housing; an upper reservoir housing defining a upper fluid chamber; a lower reservoir housing defining a lower fluid chamber; a piston spindle resiliently coupled to the upper housing with an upper elastomer member, the piston spindle being resiliently coupled to the lower housing with a lower elastomer member; an inertia track having a tuning passage, the inertia track being removably coupled to the piston spindle; and a tuning fluid disposed within the upper fluid chamber, the lower fluid chamber, and the tuning passage. The vibration isolator cancels vibratory forces at an isolation frequency, the isolation frequency being at least partially dependent upon a size of the tuning passage.

Abstract: A fluid-filled type vibration damping device including a partition member having a housing space, and a movable plate housed within the housing space so that displacement thereof is limited by abutment against inside wall faces of the housing space. Abutted sloping faces are defined by outside peripheral portions of the inside wall faces of the housing space situated in opposition in an axial direction while sloping axially outside going towards an inner peripheral side. An outside peripheral abutting portion formed of a rubber elastic body is provided to an outside peripheral portion of the movable plate, and abutting sloping faces are defined by opposite faces of the outside peripheral abutting portion that slope axially outside going towards the inner peripheral side. The abutted sloping faces and the abutting sloping faces have different slope angles so as to slope relative to each other.

Abstract: A liquid-sealed vibration isolation device including: a cylindrical outer tube member; a boss member; a vibration isolation base body ; a diaphragm; a partition member; an orifice; a decompressing-cum-pouring hole allowing the liquid-sealed chamber to communicate with the outside; and a sealer sealing the decompressing-cum-pouring hole. In the liquid-sealed vibration isolation device, an annular attaching member is provided to which the diaphragm is vulcanizingly adhered on the inner peripheral side and which is formed into an annular shape when viewed in the axial direction and attached to the upper end side of the outer tube member, and the decompressing-cum-pouring hole is disposed in the annular attaching member.

Abstract: A fluid filled vibration damping device having an orifice passage formed in a partition member to connect a pressure receiving chamber and an equilibrium chamber, wherein a first end section of the orifice passage extends in along a plane of the partition member, and a communication hole is formed to bend at a right angle from the first end of the orifice passage and open towards the pressure receiving chamber to form a dead water region by orthogonal wall faces of a terminal end face and a bottom face of the orifice passage in a connecting corner section of the orifice passage with the communication hole. A shunt hole of smaller cross-sectional area than the orifice passage and the communication hole is formed in a bottom wall so that the pressure receiving chamber and the equilibrium chamber communicate through the shunt hole in the dead water region.

Abstract: An item assembly and a shock attenuation method for protecting an item comprising providing an item internal to an assembly and encasing the item in a fluid material such that the material and the item are approximately in hydrostatic balance upon an impact event.

Abstract: Embodiments of a dual path hydraulic strut mount are provided, as are embodiments of a vehicular suspension system including a dual path hydraulic strut mount. In one embodiment, the dual path hydraulic strut mount includes an outer elastomeric module and an inner hydraulic module, which is mounted in the outer elastomeric module. The inner hydraulic module is configured to operate in an active damping mode for axial displacements of the dual path hydraulic strut mount less than a threshold value and in a substantially inactive damping mode for axial displacements of the dual path hydraulic strut mount greater than the threshold value.

Abstract: An air-damped engine mount has a filter module installed in a damping chamber formed by coupling between a main rubber and a main pipe. The air-damped engine mount may include a bolt, a main rubber into which the bolt is fitted and coupled, a hollow main pipe coupled with the main rubber and supporting the main rubber, a cover plate coupled with the main pipe to form a damping chamber between the cover plate and the main rubber, and a filter module coupled with the cover plate and configured to permit air to communicate through the filter module against flow resistance with the damping chamber and the outside, wherein the flow resistance against the air passing through the filter module regulates air pressure inside the damping chamber to reduce vibration in the main rubber.

Abstract: A pylon mounting system with vibration isolation is provided. The system generally includes a housing that defines a first fluid chamber and a second fluid chamber, a fluid disposed within the fluid chambers; a piston assembly at least partially disposed within the housing, and a tuning passage defined by the piston assembly for providing fluid communication between the fluid chambers. The piston assembly has a first arm and a second arm, and each arm has a tubeform bearing for providing pitch and roll stiffness.

Abstract: A fluid-filled type vibration damping device including a resin bracket provided on an outside peripheral face of a second mounting member. The resin bracket includes a mating portion mated within a mating groove of the second mounting member opening in an outside peripheral face of the second mounting member, a mating tubular portion extending on the outside peripheral face of the second mounting member from the mating portion to one axial side, and a mounting portion which is formed at a distal end portion of the mating tubular portion on the one axial side and extends peripherally outward. A weight reducing space opens at a distal end face of the mating tubular portion on the one axial side while extending between an inside peripheral face of the mating tubular portion and the outside peripheral face of the second mounting member in a circumferential direction.

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; 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 dual series damper includes a fluid damper portion and a elastomeric damper portion. The fluid damper portion includes a first housing, a first connection member, and a piston coupled to the first connection member. The piston divides an interior of the first housing into a first fluid chamber and a second fluid chamber. The piston has a fluid passage in the piston, the fluid passage being configured to provide fluid communication between the first fluid chamber and the second fluid chamber. The elastomeric damper portion includes a second housing, a second connection member coupled to the second housing, and an elastomer between the first housing and the second housing. When a lead/lag force is introduced to the dual series damper, the fluid damper portion behaves rigidly so that the elastomeric damper portion dampens the lead/lag oscillation.

Abstract: The present invention relates to a method of manufacturing a vibration isolator (10), wherein in a sealing step in which a liquid mixture is sealed inside the interior of a first mounting component (11) in a vibration isolator main body (21), after the internal pressure inside the first mounting component (11) has been changed to a negative pressure which is equal to or greater than the vapor pressure of a first liquid (L1) which has the lower vapor pressure from among the first liquid (L1) and a second liquid (L2), the first liquid (L1) is injected into the interior of the first mounting component (11) so as to raise the internal pressure thereof, and, thereafter, the second liquid (L2) is injected into the interior of the first mounting component (11).

Abstract: An anti-vibration assembly is disclosed including a rigid bracket fixed to a vehicle powertrain, a vehicle body and an anti-vibration mount including: a first tubular mounting member, in which the bracket is received; a second mounting member fixed to vehicle body; an elastomer body connecting the first mounting member to the second mounting member; and a rigid strap including two legs and a top. The second mounting member is fitted in the two legs of the strap in the first direction upwards and is pressed by said two legs directly on the vehicle body in said first direction. The strap further includes a bridge portion joining the two legs under the bracket.