Abstract: A hydraulic engine mount is provided having at least one channel provided within the engine mount. The channel is provided fully enclosed within the engine mount. The channel includes at least two restrictions operable to partially restrict fluid flow through the channel thereby preventing unwanted noise heard by the user. The at least two restrictions include at least one protrusion extending away from a side wall of the channel. Two protrusions are provided to form each restriction where the protrusions are opposed and spaced apart extending into the channel. The at least one protrusion includes at least one sloped wall. The at least one sloped wall is disposed upstream of the fluid through the channel and may be positioned adjacent to an inlet or an outlet of the channel.

Abstract: A fluid-filled vibration damping device including: first and second mounting members elastically connected by a main rubber elastic body; a partition member supported by the second mounting member; a pressure-receiving chamber and an equilibrium chamber disposed on either side of the partition member; a housing space formed within the partition member; a plate-shaped movable member arranged in the housing space with liquid pressures of the pressure-receiving chamber and the equilibrium chamber applied to the respective faces of the movable member; and a rubber buffer arranged on wall inner surfaces of the housing space to be struck by the movable member. The movable member is grasped partially in a thickness direction between the wall inner surfaces of the housing space via the rubber buffer at surfaces facing the wall inner surfaces of the housing space.

Abstract: A partition member is provided with an elastic body for absorbing hydraulic pressure fluctuation of the primary liquid chamber and a frame member for supporting an outer circumferential portion of the elastic body while aiming to prevent the rotation of the elastic body. A relief aperture communicating between the primary liquid chamber and the secondary liquid chamber is located on the outer circumferential side in the elastic body supporting region of the frame member. A relief valve for opening and closing the relief aperture is integrally formed on the outer circumferential side of the elastic body. The relief valve is formed of a pair of right and left relief valves. A width across flat sections are formed on a thick-walled outer circumferential section of the elastic body which is located between the right and left relief valves, such as to serve as a detent means.

Abstract: A valve member formed of an elastomeric membrane for opening and closing a second orifice flow passage is mounted on a partition element such that the valve member is arranged orthogonal to the flow direction of the second orifice flow passage. A valve portion for closing openings of the second orifice flow passage due to flexural deformation of a flexible membrane portion caused by liquid flow in the second orifice flow passage is arranged on the flexible membrane, and communication holes for bring the second orifice flow passage into communication are formed in the flexible membrane portion. A cylindrical buffer portion projecting from the flexible membrane portion for surrounding the openings when the flexible membrane portion is deformed by flexure is provided to the valve portion, and a projection height of the cylindrical buffer portion is set larger than a wall thickness thereof.

Abstract: A composite damper includes a first connector, a second connector and at least a dampening device. The first connector and the second connector are relative movable to each other, and the at least one dampening device is received between the first connector and the second connector. The dampening device comprises at least a rigid member and at least a dampening member, wherein the rigid member has the properties of high stiffness and low damping, while the dampening member has the properties of low stiffness and high damping. With such design, the composite damper could absorb vibrations during earthquakes.

Abstract: A fluid-filled vibration damping device including: a primary fluid chamber which gives rise to internal pressure fluctuations based on deformation of a main rubber elastic body at times of vibration input; an auxiliary fluid chamber which gives rise to pressure differentials relative to the primary fluid chamber at times of vibration input; an orifice passage which permits a non-compressible sealed fluid filling the primary fluid chamber and the auxiliary fluid chamber to flow between the two fluid chambers; and an insoluble powder mixed in the sealed fluid filling the primary fluid chamber which provides a bubble nucleus and accelerates dispersed generation of bubbles when pressure within the primary fluid chamber is decreased.

Abstract: An electronic active mount capable of a bidirectional control includes a core positioned inside a housing and connected to an engine. A main rubber is configured to connect the core and the housing. An upper orifice is coupled to an end of the main rubber to form an upper fluid chamber. A membrane is coupled to be moved up and down is connected to a lower orifice. A lower housing is formed at a central portion of the lower orifice, and a diaphragm is spaced apart from the lower orifice at a predetermined distance, which may attenuate vibration by using two electromagnets provided in an electronic mount.

Abstract: A vibration damping device has a first support member and a second support member. A first component and a second component are disposed between the first support member and the second support member to define a first fluid chamber and a second fluid chamber. A channel extends between the first and second chambers. During compression and extension of the vibration damping device, fluid transfers between the first and second chamber to provide a damping force for the vibration damping device. The fluid within the cambers of the vibration damping device has a fluid density in the range of 1.25 g/cm3 to 2.2 g/cm3, a fluid viscosity below 10 cSt @ 20° C. and a fluid surface tension below 40 dynes @ 20° C.

Abstract: A damper includes a housing that forms a fluidly sealed cavity for receiving a fluid therein. The fluid is configured to change fluid properties as electrical energy is induced. An electrical subsystem provides electrical energy to the fluid, which is monitored with a control subsystem. The method includes inducing the fluid with electrical energy to change the dampening effects of the damper in real time.

Abstract: A post-formation filling type fluid filled vibration damping device wherein a first communication groove, which interconnects a plurality of through holes, is formed in a partition member that separates a pressure receiving chamber and an equilibrium chamber, the groove being formed in a surface of the partition member that opposes a flexible membrane. In addition, a second communication groove, which connects an orifice passage and at least one of the plurality of through holes, is formed in the surface of the partition member that opposes the flexible membrane.

Abstract: In a liquid-filled vibration isolating device according to a first aspect of the present invention, at least one of a membrane support (11) and a membrane retainer (12) has a through hole (14) partitioned into a plurality of windows by one or more beams (15) each having a curved or deflected shape in a plane perpendicular to the thickness direction of a partition member (9).

Abstract: In an antivibration device (1), a partition plate (45) includes a main partition plate (46) made of an elastic material interposed between a protruding portion (60) and a support portion (54), and a reinforcement member (47) which is buried in the main partition plate (46) and is configured of a hard body that is harder than the main partition plate (46). The main partition plate (46) divides a main liquid chamber (9A) and a sub-liquid chamber (9B), and blocks the opening end of the hard member (50). A space surrounded by the hard member (50) and the main partition plate (46) constitutes a restriction passage (10). In the main partition plate (46), a communication portion (42) that penetrates therethrough in an axial direction and causes the main liquid chamber (9A) and the restriction passage (10) to communicate is formed. The reinforcement member (47) is disposed to surround the peripheral edge of the communication portion (42) in the main partition plate (46).

Abstract: A fluid-filled vibration damping device including an elastic buffer body supported by a partition member and arranged in a housing space such that at least one of wall inner surfaces of the housing space on sides of a pressure-receiving chamber and an equilibrium chamber is covered by the elastic buffer body. Windows are formed to penetrate the elastic buffer body at portions corresponding to communication holes formed in walls of the housing space so that the communication holes are narrowed by the windows of the elastic buffer body, and a ratio (a/l) of an opening area (a) of the windows to a penetration length (l) thereof is made smaller than a ratio (A/L) of an opening area (A) of the communication holes to a penetration length (L) thereof.

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: In a liquid-sealed antivibration device 10 which includes: a main liquid chamber 34A where a vibration-isolating base 16 forms a portion of a chamber wall thereof; a subsidiary liquid chamber 34B where a diaphragm 36 forms a portion of a chamber wall thereof; a partition element 38 by which the main liquid chamber 34A and the subsidiary liquid chamber 34A are partitioned from each other; and an orifice flow passage 40 which allows the main liquid chamber 34A and the subsidiary liquid chamber 34B to be communicated with each other, an elastic membrane 42 is formed on the partition element 38, and the elastic membrane 42 is formed of rubber composition containing butyl rubber or halogenated butyl rubber. Due to such a constitution, an abnormal sound generated by collision of the elastic membrane 42 is reduced.

Abstract: A partition element partitions a liquid-sealed chamber into a main liquid chamber and a first sub liquid chamber. A first orifice flow passage for connecting both liquid chambers is provided. A second diaphragm is formed in the partition element. The partition element includes a second sub liquid chamber partitioned from the main liquid chamber by the second diaphragm and a second orifice flow passage for connecting the first and second sub liquid chambers to each other. A valve portion brought into contact with a periphery around an opening of the second orifice flow passage is formed on a flexible membrane portion of the second diaphragm into a surrounding wall shape. A through hole is formed outside the valve portion, and a projection compressed by a counter wall is formed on a membrane surface of the flexible membrane portion on a main liquid chamber side.

Abstract: A spring structure includes a clockwise spring and a counterclockwise spring that are coaxially arranged under a state in which a spring seat is interposed between a lower end portion of the clockwise spring and an upper end portion of the counterclockwise spring. An upper end portion of the clockwise spring is supported on an upper spring seat portion, and a lower end portion of the counterclockwise spring is supported on a lower spring seat portion.

Abstract: A system and method to change a spring rate of a damper in real time. The damper includes a housing having an inner surface that forms a cavity. An elastomeric material is disposed within the cavity and fixedly attached to the inner surface of the housing. A first chamber is formed by a first end of the elastomeric material and the inner surface of the housing. The method includes restricting movement of the elastomeric material by regulating the pressure within the first chamber, which in turn changes the spring rate of the damper.

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 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: Apparatus for dispersing impact forces are provided. Provided in one embodiment is an apparatus for dispersing impact forces includes a housing having a contact end with an aperture; a contact member located at least primarily inside the housing; a biasing member biasing the contact member toward the housing aperture; and means for securing the housing contact end to a surface. When an impact force is received upon the impact receiving surface, the force is at least partially transferred to the contact member, which in turn temporarily alters the biasing member, which subsequently returns the contact member to an initial position. The return of the contact member imparts a second force on the impact receiving surface, which is less than the impact force transferred to the contact member.

Abstract: To provide a novel damper for a compressor that includes a vibration isolation system that suits the low rotation speed of a compressor of a cooling apparatus. A plurality of support projections that support annular mounting portions of a compressor at multiple points are provided at an upper end portion of a cylindrical support. The plurality of support projections elastically support the compressor so that the compressor has a high center of gravity and allow the compressor to be laterally displaced by vibration. Moreover, a bellows portion that is elastically deformed while being in contact with the annular mounting portion that becomes laterally displaced is provided. The elastic deformation of the bellows portion buffers the lateral displacement of the compressor and stirs a viscous fluid that fills inside thereof to buffer the vibration.

Abstract: Axially damping hydraulic mount is provided, relating to elastomer mounts for engine mounts for damping the vibrations transmitted from internal combustion engine to the body and for acoustic decoupling. The hydraulic mount includes a frustoconical elastomer support spring, between mount core and upper part of outer jacket, with a working chamber and a compensating chamber for fluid damping medium. Chambers are separated from one another by a separator extending transversely to the mount axis and includes a coupling diaphragm, wherein the working chamber is enclosed by support spring and separating element. Compensating chamber is enclosed by separating element and elastomer bellows. A duct on the separating element is enclosed by a duct part. To counteract excessive increase in dynamic spring rate when frequencies of axially acting vibrations are present, the duct part is occupied by an additional mass. Then the duct part is rigidly connected to a mass element.

Abstract: A fluid-filled type vibration damping device including an elastic movable member attached to a partition member. The elastic movable member includes a clasped portion clasped by the partition member and a switching portion provided to an outer peripheral side of the clasped portion and positioned within a second orifice passage. An abutting portion is provided to the switching portion and projects to lengthwise opposite sides of the orifice passage. A switching mechanism is constituted for opening the orifice passage through a gap formed between the switching portion and the inside face of the orifice passage while closing the orifice passage by abutment of the abutting portion against the inside face of the orifice passage by means of a tilting motion of the switching portion relative to the clasped portion through elastic deformation of a thin portion provided between the clasped portion and the switching portion.

Abstract: The invention relates to a hydraulically damped drive train mount (1), in particular for a motor vehicle, comprising a mount housing (2) in which an elastic mount body (3) is arranged in a partially movable manner, the elastic mount body at least partially enclosing a first fluid chamber (4), and comprising a fluid-filled equalization chamber (6) sealed by a sealing element (5) that can be moved in the mount housing (2), wherein a membrane (7) arranged in the mount housing (2) separates the first fluid chamber (4) from the equalization chamber (6). The invention is characterized in that the pressure in the equalization chamber (6) can be adjusted by means of the sealing element (5) that is formed as an axially movable piston (8).

Abstract: A temperature-compensating damping element, which is suitable for the temperature-independent reduction of vibrations, which has a fixed, non-elastic outer part and a fixed, non-elastic inner part, which is either inserted fully or partly into a mating cut-out or opening of the outer part. The outer and inner parts have contact surfaces which are connected to one another by an elastic layer which comprises an elastomer material and which is, or can be, pre-tensioned with respect to a desired frequency by a tensioning element. The elastic layer which is responsible for the vibration damping is directly connected at one or more points to an additional elastic volume. The additional elastic volume is a multiple of the volume of the elastic layer, and has the effect that the excitation frequency of the damping element changes in the case of a temperature change within a temperature range.

Abstract: A vibration-damping rubber composition is provided, which is used as a material for a rubber member of a liquid-filled vibration-damping rubber device in which a glycol liquid is sealingly contained. The rubber composition comprises: (A) a chloroprene rubber as a major component; and (B) an aromatic hydrocarbon plasticizer. The rubber composition makes it possible to suppress increase in the hardness of the rubber member (chamber wall) after thermal aging and reduction in durability.

Abstract: A liquid sealed vibration isolating device has first and second mounting members and an insulator placed between the mounting members. A partition member partitions a liquid chamber into primary and secondary liquid chambers. A valve portion provided on a diaphragm enclosing the secondary liquid chamber opens and closes a port of a passage between the liquid chambers. The valve portion has an annular thick wall portion which contacts a valve seat portion provided around the port and a movable elastic diaphragm portion provided on an inside of the wall portion and is thinner than the wall portion so as to be elastically deformable by a pressure of the hydraulic liquid. The hydraulic liquid passing through the passage causes orifice resonance when the passage is opened by the valve portion. The diaphragm, including the valve portion, membrane-resonates at a frequency in the vicinity of a resonance frequency of the orifice resonance.

Abstract: Provided is a damping device including a cylindrical body sealed with an inner cover and an outer cover at both ends, a support rod coupled to one end of the cylindrical body to perform an axial motion, the support rod including a moving plate having a damping orifice in the cylindrical body, the support rod including a nut configured to adjust a length of the support rod at an inner side end received in the cylindrical body, and a buffering device configured to store elastic energy in one of a first spring and a second spring based on a moving direction of the moving plate, the buffering device including the first spring inserted in the inner cover, the second spring inserted in the outer cover, and a lubricant in the cylindrical body.

Abstract: A fluid-filled vibration damping device including a hollow buffer body with an inner space. The hollow buffer body is housed in a housing space of a partition member to come in contact with wall inner surfaces of the housing space on sides of a pressure-receiving chamber and an equilibrium chamber, while stores a movable member in the inner space thereof. Liquid pressure of the pressure-receiving chamber is applied to a first face of the movable member by having a first window portion formed in the buffer body communicated with a first communication hole of the housing space while liquid pressure of the equilibrium chamber is applied to a second face of the movable member by having a second window portion formed in the buffer body communicated with a second communication hole of the housing space.

Abstract: The invention relates to a damping device for movable furniture part, comprising:—a damper housing,—a fluid chamber which is arranged in the damper housing and in which a piston is movably mounted,—a tappet which is connected to the piston, at least one seal being arranged between the damper housing and the tappet in order to seal the fluid chamber, wherein the tappet passes through the seal,—a compensating chamber which is fluidically connected to the fluid chamber, which runs laterally parallel to the fluid chamber, and in which at least one deformable compensating body is arranged in order to compensate for a volume change due to the tappet being immersed into the fluid chamber, said deformable compensating body and the at least one seal being designed together as a single piece.

Abstract: A vibration isolator includes an inner tube (11), an outer tube (12) surrounding the inner tube (11) from a radial outer side of the inner tube, and an elastic body (13) coupling the inner tube (11) and the outer tube (12). Multiple pressure-absorbing fluid chambers (35, 36), whose walls are partly formed by the elastic body (13), are disposed inside the outer tube (12), and include a pair of first pressure-absorbing fluid chambers (35) interconnected through first restricting passages (37), and a second pressure-absorbing fluid chamber (36) connected to an auxiliary fluid chamber (28), in which a fluid is filled, through a second restricting passage. The pair of first pressure-absorbing fluid chambers (35) are disposed to sandwich the inner tube (11) therebetween.

Abstract: Disclosed herein is an active mount including a housing surrounding components within the active mount and providing and outer surface, and a core disposed at an inside upper portion of the housing inside having an upper portion protruding outward from the housing. Additionally, an insulator is connected to a lower portion of the core and extends radially outward. An actuating mechanism is disposed at a predetermined distance from a lower portion of the insulator and includes a vertically movable center. A driving unit is disposed horizontally outside of the actuating mechanism and is configured to apply a force for vertically moving the center of the actuating mechanism.

Abstract: A damper apparatus includes a piston having a flange-shaped piston main body and piston rods which project from both ends of the piston main body, a cylinder having a cylinder main body which accommodates the piston main body slidably and cylindrical portions which support slidably the piston rods, respectively, a fastener which is attached to the one cylindrical portion so as to secure the cylinder to an opening/closing member, and a coil spring which biases the one piston rod to project from the other cylindrical portion such that a distal end portion of the piston rod abuts a circumferential edge of an opening portion of a vehicle.

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: A fluid-filled vibration damping device including a second orifice passage and a third orifice passage tuned to a lower frequency than the second orifice passage, and an actuator including an output portion facing openings of the second and third orifice passages on a side of an equilibrium chamber via a flexible film. The flexible film obstructs the openings of the second and third orifice passages when the output portion comes into contact against a partition member so that the third orifice passage is blocked while the second orifice passage is substantially placed in communication owing to a center recess of the output portion permitting deformation of the flexible film. Meanwhile, the flexible film is separated from the openings of the second and third orifice passages when the output portion is separated from the partition member so that the two orifice passages are placed in communication.

Abstract: There is disclosed a miniature damper (17),a viewing panel unit (1, 2, 3) incorporating a miniature damper, and a method of installing a viewing panel unit (1, 2, 3). A disclosed miniature damper (17) comprises: an elongate body (14) comprising an internal cavity having a substantially constant internal cross-section over a range of longitudinal positions; a piston housed with-in said internal cavity and configured to be movable longitudinally within said range of longitudinal positions; and a rod fixedly (15) connected to said piston at one end and extending outside of said internal cavity at the other end, wherein: a width of said elongate body in at least one direction perpendicular to a longitudinal axis is less than 6 mm.

Abstract: Disclosed herein is a pedal simulator. The pedal simulator includes a main housing, a piston provided within the main housing so as to be reciprocally movable in upward and downward directions, an elastic support portion disposed within the main housing to provide elastic force in the upward direction against one piston, and a damper including a first deformation portion and a second deformation portion having a volume greater than the first deformation portion which are vertically disposed within the main housing, the damper being made of an elastic material such that the first and second deformation portions are sequentially compressed and deformed while being pressed by the piston according to downward movement of the piston.

Abstract: A fluid-filled vibration damping device including: a partition member having first and second partition plates overlapping, and a holding area formed between overlapping surfaces of center parts of the two partition plates; and a movable membrane held and arranged in the holding area. A claw-shaped part and a perforation window are formed at respective corresponding positions of outer circumference parts of the two partition plates, and a fixing mechanism is constituted with the claw-shaped part latched in a circumference edge part of the perforation window. A widening area is provided between an outer circumference surface of the movable membrane and an inner circumference surface of the holding area by partially making a large distance therebetween. At least one of the two partition plates has a first air vent hole piercing a part constituting a wall part of the widening area.

Abstract: A structure of a cushion pad includes a main body and a plat. The main body is made of an elastic material and has a surface on which at least one raised pad unit having a hollowed interior is formed. The pad unit has a top wall forming a plurality of hollow column bladders that is inwardly recessed into the hollowed interior. Bottoms of the column bladders and a bottom circumference of the pad unit are bonded to the plate so as to form an enclosed pad. As such, the pad can be applied and mounted to various products that require cushioning. The hollow column bladders of the pad are compressible to induce elastic cushioning that provides an effect of comfortableness thereby providing functions of shock damping and protection.

Abstract: Provided is a vibration isolator (10) including a partition member (15) configured to partition a liquid chamber of a first attachment member (11) into a main liquid chamber (16a) disposed at one side in an axial direction and a subsidiary liquid chamber (16b) disposed at the other side in the axial direction, and a movable plate (18) displaced according to a pressure difference between the main liquid chamber (16a) and the subsidiary liquid chamber (16b), wherein an accommodating chamber (29) configured to accommodate the movable plate (18), a first communication hole (23) configured to bring the accommodating chamber (29) in communication with the main liquid chamber (16a), and a second communication hole (24) configured to bring the accommodating chamber (29) in communication with the subsidiary liquid chamber (16b) are formed in the partition member (15).

Abstract: A vibration absorption that is both capable of damping vibrations in two directions and high in durability. A pair of pressure receiving chambers (102A) and (102B) at symmetrical positions sandwiching an axis S are structured between a first rubber elastic body (24) and a second rubber elastic body (38). The shape of a first rubber elastic body (18) in an unloaded state is determined such that a region between an inner side joining portion (24B) and an outer side joining portion (24A) becomes substantially horizontal in a loaded state in which the first rubber elastic body (24) supports the weight of an engine.

Abstract: Apparatus for inhibiting glass breakage and glass products incorporating such apparatus are provided. In one embodiment, an apparatus for inhibiting glass breakage includes a housing having a contact end with an aperture, a contact member disposed at least primarily inside the housing, and a biasing member. The biasing member biases the contact member toward the housing aperture. In another embodiment, a glass product includes a sheet of glass and an apparatus for inhibiting glass breakage. The apparatus for inhibiting glass breakage includes: (a) a housing having a contact end with an aperture; (b) a contact member disposed at least primarily inside the housing; and (c) a biasing member biasing the contact member toward the housing aperture. The housing contact end is coupled to the sheet of glass, and the contact member rests upon the sheet of glass for receiving an impact force from the sheet of glass.

Abstract: A strut including a housing, a plunger within a space in the housing and including a tapered outer circumferential surface, a primary spring engaged with the housing, a wedge element within the space and including a tapered inner circumferential surface engageable with the outer circumferential surface, and a secondary spring engaged with the wedge element and the plunger to urge the plunger in an axial direction. The primary spring urges the plunger in the axial direction with a first force. In a fully extended mode, the plunger is maximally displaced in the axial direction. In a contracted mode, the plunger is displaced in an opposite axial direction in response to application of a second force, sufficiently greater than the first force, on the plunger in the opposite axial direction. When the second force is sufficiently decreased, the plunger displaces with respect to the housing in the axial direction.

Abstract: An apparatus and method for vibration suppression using a granular particle chain. The granular particle chain is statically compressed and the end particles of the chain are attached to a payload and vibration source. The properties of the granular particles along with the amount of static compression are chosen to provide desired filtering of vibrations.

Abstract: A partition member for partitioning a primary liquid chamber and a secondary liquid chamber is provided with a damping orifice and an elastic partition member. A leg portion integrally projects from a lower surface of the movable diaphragm so as to be pressed vertically against a stopper surface formed on an upper surface of the bottom portion of a frame member. A third liquid chamber is defined between an outer circumferential portion of the leg portion and the support wall. When a bottom surface of the leg portion is pressed against the stopper surface, the third liquid chamber is sealed to confine a hydraulic fluid thereby increasing the internal pressure. When the leg portion is brought out of contact with the stopper surface, the third liquid chamber is opened to the secondary liquid chamber, thereby allowing the hydraulic fluid to flow out of the third liquid chamber.

Abstract: A torsional vibration damper comprises an outer housing, an inner part that is concentric relative to the outer housing, a plurality of chambers formed between the outer housing and the inner part, which are filled with a damping medium and are connected to one another through overflow channels, and a plurality of leaf spring assemblies that are arranged in the chambers and join the outer housing and the inner part with one another in a torsionally flexible manner. The leaf spring assemblies have machining-induced deflections. Two leaf springs with substantially similar deflections are each arranged within a chamber. The leaf spring pairs may be arranged in a mirror-image array or in parallel to one another. Thus, the manufacturing cost of a torsional vibration damper can be reduced, while its compact outer dimensions can be maintained.

Abstract: A hydraulically damping axial mount includes a housing with an elastomeric support spring with an insertion part, a mount core part extending in axial direction (a) in the housing and supported by a support spring, and two chambers arranged underneath one another in axial direction (a) for fluidic damping. A working chamber and an equalization chamber are spatially separated by a channel unit and are hydraulically coupled with one another by a channel. One or several insertion parts which are partially covered by the elastomer of the support spring and reinforce the support spring are inserted in the elastomeric support spring. The support spring is secured in the housing by a thread pitch, formed on the outside contour of the elastomeric support spring in the circumferential direction (u) of the elastomeric support spring and brought into engagement with a corresponding inside contour of the housing during installation of the mount.

Abstract: A structure of hydraulic damper (100) comprises a cylinder (10) with a bottom wall (11), a head wall (12) and side walls (13) that define a damping chamber (15) containing a damping fluid (17); in the damping chamber (15) a piston (20) slides with a first face (20a) and a second face (20b) opposite to each other. In particular, the piston (20) defines a first chamber (21) and a second chamber (22) separate from each other and is integral to a shaft (25) with an external connection end (36). The piston (20) is suitable for carrying out a forward stroke (A), between a first dead point (BDP), towards a second dead point (TDP) and a back stroke (B) between the second dead point (TDP) and the first dead point (BDP).

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.