Abstract: A vibration damping device wherein a first stopper portion is disposed at an opening of a tubular portion of a bracket member to jut out over the opening; a second stopper portion of portal shape is disposed bridging the first opening of the tubular portion at a location axially outward from a first stopper portion; a main unit is inserted into another opening of the tubular portion; a separate stopper is juxtaposed against a first mounting member, incorporated as part of a stopper mechanism for limiting a relative displacement between the first and second mounting members in bound and rebound directions through contact with the first and second stopper portions; mounting holes perforate the first mounting member and the separate stopper; and a fixing bolt for fixing the first mounting member and the separate stopper is fixed at a location away from the mounting holes. A method of manufacturing the same is also disclosed.

Abstract: A mount assembly having a support structure mounted to a frame of a vehicle and a carrier mounted to a vehicle body. The support structure is displaceable relative to the carrier along a central axis (L). The support structure defines an inverted cup having a bottom with an aperture and a cylindrical skirt on a central axis (L) extending below the frame. A lower insulator is disposed between the support structure and a plate allowing the lower insulator to interact with the bottom and cylindrical skirt of the support structure and the plate to isolate forces in a vertical and/or lateral direction. The interaction with the support structure and the plate improves handling of lateral forces seen in a vehicle during driving events such as braking or cornering.

Abstract: A fluid-filled type vibration damping device including: a primary fluid chamber partially constituted by a main rubber elastic body connecting a first and second mounting member; an equilibrium chamber partially constituted by a flexible film; a partition member supported by the second mounting member; and a partition rubber film is superimposed against the partition member and secured interlocking with an annular interlocking projection projecting from the partition member. A first seal rubber is compressed between the interlocking projection and the tubular fitting member and extending about the entire circumference, thereby forming a working air chamber therebetween. A gap is furnished between and a second seal rubber is compressed between the tubular fitting member and the orifice member, and extending about the entire circumference.

Abstract: A method includes the steps of: detecting “starter ON” by IG-SW signal (step S12); calculating an moving average value TCRKAVE of crank pulse intervals (steps S13-S17); determining engine starting when the TCRKAVE is less than or equal to a threshold value Tth (step S19); and controlling a vibration isolating support unit M based on a natural vibration frequency of the engine when engine starting is determined (steps S20-S22).

Abstract: A mount assembly for use in a vehicle includes a primary component sandwiched between a pair of secondary components. The primary component is secured to a first member of the vehicle, and the secondary components are secured to a second member of the vehicle. The primary component has a tuned performance characteristics different than the tuned performance characteristics of the secondary components. Each of the secondary components function in series with the primary component between the first and second members such that the mount assembly has multi-rate decoupled dynamic stiffness performance.

Abstract: A liquid sealed mount 10 is composed of a vibration damping body 13 and a ring-shaped elastic body 14, the vibration damping body 13 is attached to a vehicle body frame 11, and the ring-shaped elastic body 14 absorbing vibration is incorporated between the vehicle body frame 11 and a bottom-wall side member 12. Owing to this, since the vehicle body frame 11 receives a load, a case 16 is not deformed. There is no need of making strength of the vibration damping body 13 higher, whereby reduction in weight and costs and downsizing are achieved. Since a load is applied in a compression direction of the ring-shaped elastic body 14, some cracks are prevented from occurring in the ring-shaped elastic body 14. Since both a vibration absorbing function and a vibration damping function are simultaneously provided, sufficient damping performance can be secured.

Abstract: A powertrain mount comprises an upper orifice plate, a lower orifice plate, and a generally planar diaphragm having an enlarged central node. The central node is in constant contact with the upper orifice plate and in contact with the lower orifice plate. A periphery of the diaphragm is free to move between the upper orifice plate and the lower orifice plate.

Abstract: A pneumatic actuator for use in a vibration damping device comprising: a base housing; an elastic wall member being fastened fluid-tightly to the base housing to form a working air chamber therebetween; and an urging member positioned within the working air chamber for exerting urging force on an output portion provided to the elastic wall member, such that the output portion is actuated to undergo displacement in opposition to the urging member through change in an air pressure in the working air chamber from an outside. At least one of opposing faces of the base housing and the elastic wall member on the working air chamber side thereof has a plurality of rib portions which extend from an inner circumferential side thereof towards an outer circumferential side thereof. A vibration damping device equipped with the pneumatic actuator is also disclosed.

Abstract: A shock absorbing steering device for vehicle includes an intermediate shaft that couples a steering shaft and a steering gear. The intermediate shaft includes a hollow accordion portion allowed to undergo plastic deformation. The accordion portion has plural pairs of crest portions and trough portions disposed alternately in an axial direction. At least in a part of the accordion portion in the axial direction, a depth from apexes of the crest portions to bottoms of the trough portions includes a first depth corresponding to a part of the accordion portion in a circumferential direction and a second depth corresponding to a rest part of the accordion portion in the circumferential direction. The first depth and the second depth are different from each other.

Abstract: A fluid filled type vibration damping device having a pressure-receiving chamber and an equilibrium chamber disposed on either side of a partition member. A movable cover member juxtaposed against the partition member from the pressure receiving chamber side to cover a communicating hole of the partition member. An outside peripheral edge of the movable cover member is held in intimate contact against the partition member through urging force of an elastic retainer portion. Pressure of both chambers will acts on both faces of a movable rubber film, thereby constituting a pressure fluctuation absorbing mechanism. The outside peripheral edge of the movable cover member is separated from the partition member in opposition to the urging force by negative pressure in the pressure receiving chamber for providing a shunting mechanism for preventing excessive negative pressure in the pressure receiving chamber.

Abstract: Provided is a liquid sealing type vibration control device capable of sufficiently reducing strange sounds which comprises a first attachment fitting (1), a second attachment fitting (2), a vibration-isolating base body (3), a diaphragm (9), a partition body (12), and an orifice (25), the partition body (12) including an elastic partition membrane (15) and a pair of lattice members (17, 18). The elastic partition membrane (15) is provided on its both faces with rib groups (50) in a projecting manner, the rib groups (50) each consist of plural first ribs (51) and plural second ribs (52) mingled mutually, the first ribs (51) are set in such a height dimension that their tops can be situated apart from the lattice members (17, 18), and the second ribs (52) are set in such a height dimension that their tops abut on the lattice members (17, 18) and in a smaller rib width than the first ribs (51).

Abstract: A plug-in hydraulic body to frame mounting assembly is mounted to a conventional elastomeric body mount device to increase the control of vibration from the operation of the automotive frame to the automotive component supported thereon. The connecting member of the hydraulic mounting assembly threads onto the end of the fastener passing through the conventional elastomeric body mount device and anchors the outer can to a bridging can connected to the underside of the frame offrigger bracket to provide a true plug-n-go vibration control enhancement that can be added to any desired body mount location. The deflection of the fastener during operation of the elastomeric body mount device drives the operation of the hydraulic mounting assembly to dampen the deflection of the fastener in the elastomeric body mount corresponding to the transfer of operational loads between the body component and the offrigger bracket to which the body component is mounted.

Abstract: A vehicle vibration-proof apparatus for supporting an engine and preventing transmission of vibrations from the engine includes an elastic member for connecting a first mounting member to be mounted to an engine with a second mounting member to be mounted to a vehicle body. The second mounting member includes a resinous bracket, having a tubular part and mounting parts for being mounted to the vehicle body, and a metal reinforcing bracket to be mounted to the tubular part for reinforcing the tubular part. The tubular part has a part, which is not reinforced longitudinally, between the mounting parts and a part thereof to which the metal reinforcing member is mounted.

Abstract: To block the transmission to a vehicle body side of the vibration due to the cavitation phenomenon occurred in a primary liquid chamber so as to prevent the generation of noises, at the same time, to make the device compact, and to improve the fitting accuracy to obtain the reliable positioning, a first metallic fitting and a second metallic fitting are connected by an insulator. A primary liquid chamber and a secondary liquid chamber formed inwardly are partitioned by a partition member and communicated therebetween by an orifice passage. The partition member is floatingly supported between an extended portion of the insulator and an outer peripheral thick wall portion of a diaphragm, and the tuning is performed to generate the rigid resonance at the predetermined frequency. An outer ring is provided in the outer peripheral thick wall portion so as to be securely fixed by a fixing portion formed by bending an end of an outer cylindrical fitting.

Abstract: The object of the present invention is to prevent damages of a vibration isolating rubber and cracks in a welded portion of a sub-frame when press-fitting a sub-frame mount. The sub-frame mount 1 comprises an outer cylinder 2, an inner cylinder 2 and the vibration isolating rubber 4 connecting these outer and inner cylinders. A small diameter portion 10 and a large diameter portion 11 are provided on a lateral wall of a barrel portion of the outer cylinder 2. Between the small diameter portion 10 and the large diameter portion 11 is formed a step-like boundary portion 12. The height in the axial direction of the boundary portion 12 changes in the circumferential direction and has a substantially mountain-like shape with a top 12a projecting in the press fitting direction. A contact area of the large diameter portion 11 contacting a mounting hole 21 of the sub-frame 20 is increased in accordance with an amount of the press fitting.

Abstract: A damper for a structural tower having a space frame construction for high elevation and heavy load applications is disclosed, with particular application directed to wind turbines. The structural tower includes one or more dampers for damping resonant vibrations or vibrations generated by non-periodic wind gusts or sustained high wind speeds. The wind tower damper includes a fluid damper comprising a housing, elastomeric chamber, piston and damping fluid, wherein relative motion between the first and second structural members drive the fluid moving piston to pump the fluid and thereby dissipate unwanted motion in the tower.

Abstract: Supporting collar (10) for an element (8) such as a cable or a pipe, comprising a strap (18) capable of being fixed to a support (12), an outer sleeve (16) encircled by this strap (18), an inner sleeve (14) through which said element (8) can pass, and a deformable web (15) connecting said sleeves (14, 16) and allowing the inner sleeve (14) to move relative to the outer sleeve (16). The outer sleeve (16), the web (15) and the inner sleeve (14) are formed as a single central part made of an elastomeric material, e.g. fluorosilicone. The element (8) is secured to the inner sleeve (14) with the aid of a fastening collar (20) that is fastened around the inner sleeve (14).

Abstract: A fluid filled type vibration damping device wherein an outer tubular mounting member is externally fitted onto the collar sleeve at an externally fitted section formed by a tapered tube portion of the outer tubular mounting member, by means of a diameter reduction process. A mating projection projecting diametrically inward is formed on an inside peripheral face of the outer tubular mounting member, while a seal rubber layer having a thickness greater than a projecting height of the mating projection is formed covering the inside peripheral face of the outer tubular mounting member with the mating projection covered by the seal rubber layer. A location and projecting height of the mating projection are arranged so as to prevent an entry of another outer tubular mounting member into a large-diameter opening of the tapered tube portion during pre-treatment.

Abstract: A fluid filled type vibration damping device including a fluid filled unit having a fluid chamber sealed therein, a main rubber elastic body being a separate component from the fluid filled unit, a first mounting member affixed to the main rubber elastic body at a center section of a first end thereof. The fluid filled unit is positioned next to the other end of the main rubber elastic body with an elastic rubber wall thereof juxtaposed against the end face of the main rubber elastic body. A second mounting member is formed by including a tubular housing of the fluid filled unit with the tubular housing fastened to an outside peripheral face of the main rubber elastic body. An outside air communication passage is formed at an outside peripheral section between the juxtaposed elastic rubber wall of the fluid filled unit and the end face of the main rubber elastic body.

Abstract: A vibration isolating device includes an insulator for isolating the transmission of an inputted vibration by an elastic deformation. A principal vibration input portion is provided in a central area of a concave curved wall portion formed in the insulator. A thin wall portion and a thick wall portion are formed by relatively varying a thickness of the insulator around the vibration input portion, wherein the concave curved wall portion of the insulator is formed in a substantially circular shape when viewed in a principal vibration inputted direction. The thick wall portion is formed substantially in the shape of a belt of a predetermined width and extends across the concave curved wall portion in the diametrical direction thereof while passing the vibration input portion. A rigid body covering portion for covering a surface of a metallic member of the vibration input portion is provided in the central area of the thick wall portion. A thickness of the rigid body covering portion is at least 1.7 mm.

Abstract: A fluid filled vibration damping device wherein a first and second mounting member are connected by a main rubber elastic body, a pressure receiving chamber partially formed by the rubber elastic body and an equilibrium chamber partially formed by a flexible film are formed on either side of a partition member supported by the second mounting member, an orifice passage is formed for permitting a fluid communication between the pressure receiving chamber and equilibrium chamber communicate both having a non-compressible fluid; and a movable rubber plate is housed in a housing space so that minute pressure fluctuations in the pressure receiving chamber can be absorbed by the equilibrium chamber by means of the movable rubber plate. The movable rubber plate includes at least partially a corrugated part expanding generally a form of a corrugated panel by means of continuous depressions and protrusions.

Abstract: A fluid-filled engine mount, including: an elastic body connecting a first and a second mounting member; a pressure receiving chamber partially defined by the rubber elastic body; an equilibrium chamber partially defined by a flexible layer, a first orifice passage connecting between the pressure receiving and equilibrium chambers and tuned to a low frequency range, a second orifice passage connecting the both chambers and tuned to a medium frequency range; a valve member for opening/closing the second orifice passage and operated by a pneumatic actuator; a movable partition member including a rigid center movable plate portion and a readily deformable outer peripheral rubber film portion supported fluid-tightly by the second mount portion; and an intermediate equilibrium chamber formed opposing to the pressure receiving chamber with the movable partition member interposed therebetween.

Abstract: A hydraulic antivibration support comprising a first rigid member; a second rigid member; a substantially frusto-conical elastomer body, extending vertically along a central axis between the first and second rigid members, wherein the working chamber and the compensation chamber are partially superposed along said central axis. The elastomer body is adapted to support static loads and defines inwardly a working chamber and partially defines outwardly an annular compensation chamber.

Abstract: A fluid-filled type vibration-damping device having: an elastic body connecting first and a second mounting members; a pressure-receiving chamber formed axially below the main rubber elastic body and partially defined by the main rubber elastic body; an equilibrium chamber formed between the main rubber elastic body and a flexible film by disposing the flexible film so as to cover an outside face of the main rubber elastic body; and an orifice passage through which both chambers communicate with each other. An equilibrium-chamber-side opening of the orifice passage is situated in proximity to an axial lower end of the outside face of the elastic body. A guide groove extending axially upward is formed in proximity to the equilibrium-chamber-side opening. A projecting rib projects from the flexible film towards the guide groove is formed extending along the guide groove.

Abstract: A dampening clip assembly may include a spring mount, a clip member, and a sealing member. The spring mount may include a base, a piston cylinder extending from the base and defining an interior cavity, a mounting surface having a passage formed therethrough, and a spring positioned between the base and the mounting surface. The clip member is secured to the spring mount and configured to retain a tube. The clip member includes a piston extending from a main body. The piston may be disposed within the interior cavity of the piston cylinder. The sealing member may be secured to a portion of the piston, and forms a fluid-tight seal between the piston cylinder and the piston.

Abstract: An antivibration support disposed for supporting and dampening loads between external elements, comprising a first and a second rigid member for securing to the external elements, and an elastomer body, connecting respectively the first and second rigid members. The support also comprises a second body, having dissimilar material properties from the elastomer body, acting in parallel with the elastomer body to support and dampen the loads.

Abstract: A fluid-filled vibration-damping device includes an elastic body elastically connects a first mounting member and a cylindrical second mounting member bonded to opposite side thereof; a diaphragm supported by the second mounting member so that the diaphragm cooperates with the elastic body to define therebetween a fluid chamber; and a partition member supported by the second mounting member so that the partition member divides the fluid chamber into a primary fluid chamber and an auxiliary fluid chamber which are held in communication through an orifice passage defined by an orifice-defining member having a movable rubber plate disposed in its central hole. The surface of the orifice-defining member is coated at a primary-fluid-chamber-defining area by a coating rubber layer, thereby minimizing noises caused by bubbles in the fluid chamber.

Abstract: A vibration damping device wherein a stopper rubber disposed between opposing faces of a first mounting member and the retainer member so as to project from one of the opposing faces to the other. When the first and second mounting members undergoes relative displacement axially towards each other, a shock produced at a time when an abutting face of the first mounting member comes into contact with the open end face, i.e., an abutting face of the retainer member absorbed by the stopper rubber coming into contact with the other one of the opposing faces until the first mounting member comes into contact with the open end face of the retainer member. A receiving space is disposed between the opposing faces of the first mounting member and the retainer member so that the stopper rubber is accommodated in an elastically compressive-deformed state within the receiving space when the abutting faces contact together.

Abstract: A fluid-filled type vibration-damping device wherein first and second mounting members are connected by a main rubber elastic body defining a pressure receiving chamber connected via an orifice passage to an equilibrium chamber defined by a flexible diaphragm. A partition member dividing both chambers is elastically supported by the second mounting member such that an outer rim of the partition member is pinched between a first support rubber elastic body and a second support rubber elastic body, while being spaced away radially inwardly from the second mounting member, whereby the partition member is displaceable relative to the second mounting member due to elastic deformation of the first and second elastic support bodies to provide a fluid pressure absorbing mechanism to check pressure fluctuation in the pressure receiving chamber to the equilibrium chamber.

Abstract: A stopper for a cylindrical elastic mount includes a concave portion which is formed at each of a plurality of locations on a circumference of a cylindrical portion of a stopper fitting, the concave portion being concaved in a radially inward direction to partially enlarge a width of an outward flange so as to provide a large width portion on an enlarged width portion of the outward flange of a first rubber portion. The stopper further includes a plurality of second rubber portions each of which is fixedly disposed only between adjacent concave portions in a circumferential direction of a bottom portion and protruding higher than the first rubber portion. The first and each of the plurality of the second rubber portions are separated by a groove-shaped gap that is provided so as to continuously extend around each of the plurality of second rubber portions.

Abstract: In an electromagnetic actuator including a bearing member which slidably supports a variable core, a yoke for retaining a coil assembly by cooperation with a bottom wall of a housing is connected to the housing, and the bearing member is fitted into the yoke. A support for supporting an outward-facing flange formed at one end of the bearing member is mounted on the bottom wall, and a set spring for biasing the outward-facing flange toward the support is mounted under compression between the outward-facing flange and the first yoke. A low-friction material coating made of a fluorocarbon resin is formed on at least one of opposed sliding surfaces of the bearing member and a movable core. Thus, even if wear powder is generated between the set spring of the bearing member and a portion on which the set spring is pressed, the wear powder is prevented from entering inside the bearing member.

Abstract: A fluid-filled type vibration-damping device having a movable rubber plate housed within a partition member partitioning a pressure-receiving chamber and an equilibrium chamber from each other. The movable rubber plate is moved owing to the pressure difference between the two chambers. The movable rubber plate comprises the movable rubber plate formed of a generally disk shaped rubber elastic body having formed thereon in alternating fashion concave grooves and convex ribs each extending in a circumferential direction about a same center axis, the convex ribs have tapered cross section gradually narrowing in width towards an distal end thereof, and the concave grooves and convex ribs are disposed at the same locations in a diametrical direction on either face of the movable rubber plate so that the thickness of the movable rubber plate is varied in the circumferential direction.

Abstract: A hydraulic anti-vibration support comprises at least one elastomer spring body made of a high temperature-resistant material which connects a first rigid strength member and a second rigid strength member. The first rigid strength member includes a piston which comprises a rod terminated by an end member, and a second rigid strength member has an opening which is traversed by said piston. A liquid-filled module is mounted inside a casing which is secured to the second rigid strength member, and includes a working chamber defined in part by a substantially dome shaped elastomer wall which has a central area in contact with the end member of the piston without any mechanical securing. Preferably, the high temperature-resistant material comprises silicone and is in non-adhesive contact with the first and the second rigid strength members.

Abstract: In a hydraulic style vibration-proof device, a lower attachment fitting (34) forming an air chamber (36) between a diaphragm (16) and itself is fabricated of aluminum and is provided at its bottom wall portion with a through-hole (50), and a bolt (52) having a serration portion (54) below its head is press fitted in and secured to the through-hole, thereby fixedly providing the bolt (52) without involving a large projection into the air chamber (36) and at a low cost Further, the bottom wall portion (34B) is formed to be thicker than a peripheral wall portion (34C) of the lower attachment fitting and both are interconnected by a curved portion (34D), thereby achieving an increase in strength.

Abstract: A fluid filled vibration damping device including: a low-frequency orifice passage opening directly towards a pressure-receiving chamber and an equilibrium chamber at either axial end surface of a first orifice member; a rubber partition plate disposed between a bottom surface of a center concavity of the first orifice member and a bottom end surface of a second orifice member, to create a seal mechanism that grasps an outer perimeter edge and a center diameter section of the rubber partition plate with a fluid-tight seal therebetween. Semicircular sections of the rubber partition plate surrounded by the areas grasped by the seal mechanism constituting a first deformable membrane section and a second deformable membrane section that respectively allow prescribed amounts of elastic deformation.

Abstract: A measuring unit is removably connected to a sample analyzer. The measuring unit includes a first member having a first channel through which a sample is allowed to pass, a second member having a second channel through which the sample is allowed to pass, and a partition member having a through-hole through which the sample is allowed to pass from the first channel to the second channel. The partition member includes a base having the through-hole and a projecting portion which projects from the base around the through-hole.

Abstract: There is provided a hydraulic antivibration device and an assembly capable of obtaining a low dynamic spring characteristic upon input of relatively small amplitude vibrations and reducing sufficiently strange sounds. The low dynamic spring characteristic is obtainable by absorption of hydraulic pressure fluctuations between both liquid chambers due to reciprocating displacement of an elastic partition membrane. First and a second attachment fittings are constituted respectively as body frame side coupling means and as vibration generator or engine side coupling means, whereby part of a vibration transmitting path from partitioning means to the body frame can be formed by a vibration-isolating base.

Abstract: An vehicle/engine mount can include a first connection device for connecting to an engine power system, a second connection device that is configured to connect to either the vehicle frame or the vehicle body, a stopper system, and a damper system. The damper system can be configured to prevent transmission of vibration or movement between the first connection device and the second connection device. The stopper system can include a liquid-filled bladder device located adjacent one of the first connection device and second connection device and configured such that it provides an ultimate limit for one of axial and radial movement/vibration of the first connection device relative to the second connection device.

Abstract: An improved and tight package vibration isolator assembly increases the strength of the mount structure without compromising the efficiency of the damping features. An exo-skeleton bracket design provides a rigid structural strength able to withstand extreme loads. The bracket also allows forces to bypass the fluid components of the damping assembly that are otherwise subject to potential passage of forces therethrough. The exo-skeleton bracket provides a stiff structure that substantially surrounds the damping assembly. Tuning of the assembly is also simplified through use of a travel limiter assembly, the cross-section of which may change in shape, or characteristics of a surrounding resilient sleeve selectively altered, to tune the damping characteristics of the damping assembly.

Abstract: A fluid-filled vibration damping device including: an elastic body connecting a first and a second mounting member, defining a pressure receiving chamber undergoing pressure fluctuation during input of vibration; an equilibrium chamber defined by a flexible layer for permitting its volume change; an orifice passage connecting the pressure receiving chamber and equilibrium chamber; a movable member; and a short passage for connecting two chambers with a length smaller than that of the orifice passage. When pressure in the pressure-receiving chamber increases, the movable member is displaced or deformed toward to close the equilibrium-chamber-side opening of the short passage to have the short passage substantially closed, while when pressure in the pressure-receiving chamber decreases, the movable member is displaced or deformed to have the short passage operative.

Abstract: A fluid filled type vibration damping device includes: a main rubber elastic body elastically connecting first and second mounting members; a partition member supported by the second mounting member; a pressure-receiving chamber partially defined by the elastic body and having a non-compressible fluid sealed therein; an equilibrium chamber partially defined by a flexible film and having the non-compressible fluid therein. The chambers are formed to either side of the partition member and an orifice passage permits a fluid communication between the two chambers. A short-circuit passage is formed so that the pressure-receiving and equilibrium chambers are able to be short-circuited through the short-circuit passage. A valve is used for switching the short-circuit passage, and a metal spring is used for holding the valve in a closed state at a predetermined initial level of elastic deformation.

Abstract: A hydraulically damping rubber bush bearing suitable for absorbing cardanic loads in the vertical installed position and yet has a simple geometry and construction. The bearing has chambers receiving the damping agent and has an undercut in the direction of the bearing axis at least in the area of one of their axial ends. An inner cage and the elastomeric bearing body are axially shortened in the corresponding circumferential section compared to the rest of their circumferential sections.

Abstract: A vehicle roll-rod includes a front insulator, rear insulator, rod, front stopper, rear stopper, and middle stopper. The roll-rod restrains and attenuates rolling of relatively small movements occurring during driving. The vehicle roll-rod also restrains and attenuates rolling of large movements occurring in the event of a force of impact and vibration during rapid accelerations, sudden stops, or turning on/off the ignition key of the engine.

Abstract: An oscillation limiting mechanism 4 is integrally provided to an engine mount 3 (a vibration proof mount device) of a power plant P mounted on an automobile in a traverse mount fashion. Not only is a stopper metal member 40 in the shape of an inverted U letter disposed so as to cross over a mount body portion 30, but a stopper rubber 42 is formed so that it protrudes from the rear end of a casing of the mount body portion 30 toward the rear side of the vehicle body. Not only is a hollow portion 43 formed in the interior of the stopper rubber 42, but a metal core body 44 is also embedded in the stopper rubber 42 so as to be revolvable around an axis in the vehicle body traverse direction as if it were a link.

Abstract: A vibration isolation device includes two attachment members inter-connected by an elastic member. One of the attachment members comprises a metal tubular member connected to the elastic member, a metal bracket in which the metal tubular member is press-fitted, and a plastic bracket supporting the metal bracket and adapted to be attached to a support body or a vibratory source. The metal bracket has an engagement portion press-fitted with the metal tubular member, and a non-engagement portion offset from the engagement portion in a radial outward direction and held out of press-fitted engagement with the metal tubular member, the non-engagement portion being connected to the plastic bracket with a second elastic member disposed therebetween.

Abstract: A method of manufacturing a fluid-filled cylindrical damping assembly having sufficiently large extraction-resisting force in an axial direction of a metallic shaped product and an intermediate sleeve by the process following. There is provided a sealing rubber layer at an inner circumferential surface of the metallic shaped product having a tapered cylindrical shape where the inner flange portion is provided at an end portion of a small-diameter side. At least one concave groove is formed at an inside surface of an inner flange portion The metallic shaped product is inserted on an outer circumferential surface of an intermediate molded-body in a non-compressible fluid, and is diameter-reduced so as to be fitted and fixed. A large-diameter side end portion of the metallic shaped product is radially inwardly bent to form an engaging portion, and the engaging portion is engaged with a large-diameter side end portion of the intermediate sleeve.

Abstract: A hydraulic antivibration device arrangement capable of achieving a downsizing and weight reduction, and a reduction of booming noise by suppressing a reaction force to impingement upon stopper action is provided. By disposing a protuberant rubber portion 35 at an upper end of a main body member 2, its spacing distance from a roll center can be lengthened, the reaction force to impingement can be diminished, and input load to the main body member 2 can be diminished. Consequently, reduction of rigidity and strength required for respective components as well as enhancement of durability is possible, which permits to make the components thin-walled thereby making a hydraulic antivibration device arrangement 100 lightweight as a whole. Diminishing of such reaction force upon stopper action also enables vibrations input through a car body side bracket 120 to the body frame to be suppressed, thereby reducing the generation of booming noise.

Abstract: A hydraulic bearing includes a support spring made of elastomeric material and a hydraulic volume partitioned into a work chamber and a compensating chamber. A partition wall is disposed between the two chambers and includes a transfer channel. For acoustic decoupling, a membrane-like decoupling element is seated and is displacement limited between two lattice plates. The decoupling element is made of flexible elastic material and is clamped laterally to be pressure tight. The decoupling membrane is radially prestressed for matching the acoustic decoupling to specific disturbing frequencies (hum frequencies). This prestressing takes place preferably because of the shrink process during vulcanization of the decoupling membrane which is made of raw rubber. The decoupling membrane can have a peripheral bead and at least one transverse strut. The strut can have a reinforcement insert.

Abstract: A hydraulic antivibration device capable of reducing sufficiently strange sounds and susceptible of dampening fine amplitude, high frequency vibrations is provided. A partition unit comparting a liquid-filled chamber is constructed of an elastic partition membrane and a pair of displacement-regulating members each provided with a central first opening and plural second openings around it. The elastic partition membrane includes a central thick-walled section located within the first opening, a thin-walled section around it, and a stationary section at the outer periphery thereof, plural first ribs and plural second ribs. The first ribs and the second ribs are extended at the inner peripheral margin part of the thin-walled section in a radial fashion from the thick-walled section, and portions of the thin-walled section circumferentially sectioned by the ribs front to the first opening so that liquid entering from the first opening may pass through a passage to the second openings.

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.