Abstract: A vibration control unit in which a rolling element having a first curved surface that is a convex surface is interposed between a first and second members, and the rolling element is allowed rolling with respect to the first member in the first curved surface thereof. The rolling element has a second curved surface that faces the first curved surface and is formed of a curved surface center different from that of the first curved surface. As the rolling element, resulting from an additional force applied on the first and second curved surfaces, rolls with respect to the first member, the second member vibrates with a restoring force determined based on an average curvature radius of the first and second curved surfaces of the rolling element and a distance between curved surface centers of the first and second curved surfaces.

Abstract: A device for control of the effects of vibrations on vibration sensitive equipment when a plurality of the devices are placed on a support surface and in operative contact with the vibration sensitive equipment where said device is a unitary piece of a soft, pliable substance having a hardened round crown portion.

Abstract: A retaining device includes bearing units (1111, 1112, 1121 1122) that float-mount a flat screen (2000) and that are preferably each provided with at least one elastic-positioning element (11210) and a vibration damping element (11220). The elastic-positioning element preferably includes a cylinder-shaped hard rubber spacer element (11211). The vibration-damping element (11220) preferably includes a damper with an annular plate-shaped housing and a gel filling (11221). Vibrations and shocks are introduced substantially centrally into the vibration-damping element via a tappet (11224). The retaining device is advantageously used in an electronic display device to float-mount a flat screen, configured e.g. as an LCD display unit, in combination with a touch screen as a contact-sensitive unit.

Abstract: A shock isolated operator station wherein a set of quadral elastomer mounts provide substantial static support as well as isolate equipment supported thereon from shock and vibrations forces.

Abstract: A vibration isolation system (100) for a payload (102). The vibration isolation system provides a level of vibration isolation for all vibration translational and rotational components, while minimizing the moment of the payload mass relative to the isolation system. The system includes a base (104) and a plurality of vibration isolators (114). Each vibration isolator includes a semi-rigid first support member (202) having first portion (204) positioned below the base and an opposing second portion (206) positioned above the base, and a second support member (208) having a first portion (210) fixed to the base and an opposing second portion (212) extending above the base. An elastomeric coupling (228) couples the first support member to the second support member at a height that is approximately equal to a height of a center of gravity (302) of a combined mass of the base and the payload above the base.

Abstract: A damping and mounting structure for a motor includes a bracket to which a motor is mounted, the bracket being provided with a plurality of through-holes; a housing having a driven element which is driven by the motor on the bracket; a plurality of threaded holes and positioning recesses coaxial to the threaded holes, provided in the housing; a plurality of cylindrical damper bushes made of an elastic material, mounted in the through-holes; a plurality of retainer bushes made of a material harder than the damper bushes and inserted in the damper bushes, the retainer bushes being provided, at the front ends thereof, with positioning projections which are inserted into the positioning recesses; and a plurality of set screws which extend through the retainer bushes from a surface of the bracket and are screwed into the threaded holes of the housing.

Abstract: A load-bearing, pressurized-fluid column apparatus and method for supporting a load or mine ceiling with respect to a support surface or mine floor includes an elongated, flexible sleeve and bladder retain a substantially incompressible liquid. The sleeve and bladder have a collapsed and an expanded configuration. In the collapsed configuration, the sleeve and bladder are not filled, and have a first, shorter length. In the expanded configuration, the sleeve and bladder are filled with the liquid, and have a second, longer length sized to extend to and between the load and the support surface. A valve allows the liquid to be added and prevents escape of the liquid. A base can seal a lower end of the sleeve, and can be disposed on the support surface. A cap can seal an upper end of the sleeve, and can be capable of abutting the load.

Abstract: A bracket assembly for a car shaker vibrator that includes a vibrator mounting member that is pivotally connected by a pivot pin, in a hinged or clevis arrangement, to a wedge member. The wedge member includes the male portion of a Gardner type bracket that is adapted for engaging a mating female portion that is mounted on a railroad car. The vibrator mounting member may be selectively rotated between a first position and a second position. The vibrator mounting member is retained at the first position by a locating pin during the emptying of a railroad car during the selective operation of the car shaker vibrator. The vibrator mounting member is retained at the second position by the locating pin when the dislodgement of the male portion from the female portion is desired together with the selective and subsequent operation the car shaker vibrator. An intermediate position may be provided between the first position and the second position and used when needed.

Abstract: A compound vibration damper assembly includes a vertical damping unit fixedly connected at a lower end to a locating surface for absorbing a Z-direction vibration force transmitted to a target apparatus, and a horizontal damping unit connected at a lower end to an upper end of the vertical damping unit and at an upper end to a bottom of the target apparatus for absorbing X- or Y-direction vibration force transmitted to the target apparatus. The vertical damping unit includes a locating base, a central column, a supporting plate, and a vertical vibration force damping member disposed between the supporting plate and the locating base; and the horizontal damping unit includes an horizontal vibration force damping member located between an elastomeric base plate and an elastomeric top plate.

Abstract: A vehicle suspension system is designed such that its equation of motion can be decoupled. Such a suspension system is provided with actuators, and the actuators are optimally controlled to reduce vibration of the suspension system.

Abstract: A stabilizing device for reducing or eliminating the vibration in an object to allow for easier and more accurate operation of the object. The stabilizing device includes an object bracket, legs, side arms and front arms. The legs and arms move the vibrations away from the object bracket and the object and eliminate or reduce the vibrations. The legs and arms include a core surrounded by damping material. The damping characteristics of the legs, side arms and front arms can be adjusted by selecting damping material having different damping characteristics depending on the type of object to be used with the stabilizing device and the type of vibrations to be reduced or eliminated.

Abstract: A machine tool for performing a machine tool function including components adapted to cooperate with each other to execute the machine tool function. The machine tool has a number of constituent parts and a number of sheets of damping material. Each component includes constituent parts with sheets of damping material interposed between the constituent parts. The sheets dampen vibration of the machine tool during performance of the machine tool function.

Abstract: A stable platform supports a cell, the stable platform comprises a lower mainframe, an upper mainframe, and a dampener system. The upper mainframe includes a plurality of recesses. Each recess is configured to receive a cell. The dampener system connects the lower mainframe to the upper mainframe. In one embodiment, the dampener system comprises a dampener element, such as sand, to dampen vibrations between the lower mainframe and the lower mainframe.

Abstract: The invention provides a stabilizing device for inclusion in a stack of containers in which hazardous waste is held, wherein the stabilizing device comprises a table for supporting a container in the stack, and a base, the table being movable relative to the base so as to aid stability of the stack when the stack is subjected to external forces.

Abstract: A vibration isolation system (100) for a payload (102). The vibration isolation system provides a level of vibration isolation for all vibration translational and rotational components, while minimizing the moment of the payload mass relative to the isolation system. The system includes a base (104) and a plurality of vibration isolators (114). Each vibration isolator includes a semi-rigid first support member (202) having first portion (204) positioned below the base and an opposing second portion (206) positioned above the base, and a second support member (208) having a first portion (210) fixed to the base and an opposing second portion (212) extending above the base. An elastomeric coupling (228) couples the first support member to the second support member at a height that is approximately equal to a height of a center of gravity (302) of a combined mass of the base and the payload above the base.

Abstract: The present invention comprises a vibration isolating mount used to mount a furring channel to a mounting surface wherein the furring channel comprises a channel portion and two opposing furring channel flanges. The vibration isolating mount comprises a vibration isolator of a size and shape to fit snugly around the furring channel flanges, wherein the vibration isolator has opposing flanges extending away from the furring channel flanges; and mounting brackets, wherein the mounting brackets wrap around the vibration isolator flanges, and wherein the mounting brackets are isolated from the furring channel by the vibration isolator.

Abstract: A vibration isolator (200) for isolating a first assembly (206) from vibration from a second assembly (208) includes a first system (202) and a second system (204) coupled to the first system (202). In one embodiment, the first system (202) supports the majority of the first assembly (206) relative to the second assembly (208) and the second system (204) adjusts for a change in the location of the center of gravity of the first assembly (206). Further, the second system (204) can be used to compensate for fluctuations in the atmospheric pressure near the vibration isolator (200).

Abstract: A seismically restrained vibration isolating mounting device seismically restrains and vibrationally isolates equipment which is supported by an equipment support means, from the equipment mounting surface. This seismically restrained vibration isolating mounting device is comprised of a three-axis snubber mounted to the equipment mounting surface and which restrains the equipment support means; and a vibration isolator, wherein the equipment support means is supported by the vibration isolator and wherein the vibration isolator is supported by the equipment mounting surface, wherein the vibration isolator acts in the direction of gravity, and wherein the three axis-snubber is closer to the equipment supporting surface than the vibration isolator, and the vibration isolator is external to the three-axis snubber.

Abstract: A vibration isolation table includes a stationary housing having an opening on a top surface thereof; a primary movable base which is supported by the stationary housing, and includes a bottomed hollow cylindrical portion which extends downwards into the stationary housing, and a flange portion which projects radially outwards from an upper end of the bottomed hollow cylindrical portion; a pressure chamber formed between the flange portion and the top surface of the stationary housing; and a vibration-free movable base on which an object to be isolated from vibration is mounted, the vibration-free movable base having a swingable rod which is inserted into the bottomed hollow cylindrical portion so that a bottom end of the swingable rod is supported by a base of the bottomed hollow cylindrical portion in a manner to allow the swingable rod to swing with respect to the bottomed hollow cylindrical portion.

Abstract: A firewall damper fitting for data transmission lines having a damper body and a vertically sliding cover plate. The cover plate and the damper body having protruding lip portions which allow removable access to data lines while providing an effective damper which retards heat and fire through a sleeve without damaging the data transmission lines.

Abstract: When a portable information ratio terminal device receives impact (external force) due to falling down or the like, electrical connection of an electronic part mounted on a substrate in the device body is held. The portable information terminal device includes the device body (1H) consisted of mutually combined first and second casings (3) and (4), a printed board (2) provided in the device body and mounting an electronic part (6) and an elastic body (6) supporting the printed board on the device body. The elastic body is provided between the printed board and the first casing and between the printed board and the second casing.

Abstract: A method and apparatus for damping vibration in a paper machine. The apparatus having a dynamic damper which includes a weight suspended by a spring. The spring constant of the spring is changed by means of a control device in order to tune the natural frequency of the dynamic damper. The dynamic damper is tuned to a frequency that is substantially equal to a multiple of the rotational frequency of the roll in the paper machine that is being damped.

Abstract: A vertical mount rubber bushing including a rubber elastic body elastically connecting inner and outer sleeve, wherein the rubber elastic body having cross sectional shapes viewed in a first direction of prizing force input where rubber legs are affixed to an axially center portion of the inner sleeve and extend towards opposite axial ends of the inner sleeve, towards the outer sleeve and away from the inner sleeve to either axial side of the axially center portion, thereby forming depressed spaces partially defined by the rubber legs and situated on either axial side of the axially center portion, and viewed in a second direction orthogonal to the first direction, where main body rubber portions thicker than the rubber legs elastically connect the inner and outer sleeves while extending in the second direction with a shape generally increasing in length in an axial direction moving from the outer sleeve toward the inner sleeve.

Abstract: A lid adapted to be mounted on the cylinder head of an internal combustion engine by attachment screws includes a cap and a carrier element adapted to be attached to the cylinder head by the attachment screws. To achieve an improved sound decoupling, the cap and the carrier element are connected to an elastomer component, with the connection between the cap and the carrier element being, at least in part, exclusively constructed by the elastomer component, and with a space being provided between the cap and the carrier element. The carrier element possesses a substantially straight section arranged to extending preferably at a right angle to the attachment surface of the cylinder head, the substantially straight section of the carrier element, a portion of the elastomer component adjacent the cap, and a portion of the cap adjacent the carrier element extend in a straight line.

Abstract: A shock isolator for simultaneously isolating shocks and for supporting a static load in an axial offset compression mode comprising a four-sided elastomer having a first elongated support surface and a second elongated support surface with the laterally offset from each the elastomer rotated at a point between the first support surface and the second support surface to thereby simultaneously provide shock and vibration attenuation while providing axially offset support.

Abstract: A bi-directional sliding pendulum seismic isolation system for reducing seismic force acting on a structure by sliding pendulum movements, each system comprising a lower sliding plate forming a sliding path in a first direction, an upper sliding plate forming a sliding path in a second direction, and a sliding assembly for reducing the seismic force of the structure by performing a pendulum motion by sliding along the lower and upper sliding plates.

Abstract: A shock isolator for simultaneously isolating shocks and for supporting a static load in an axial offset compression mode comprising a four-sided elastomer having a first elongated support surface and a second elongated support surface with the laterally offset from each the elastomer rotated at a point between the first support surface and the second support surface to thereby simultaneously provide shock and vibration attenuation while providing axially offset support.

Abstract: Described is an Advanced Technology Attachment (ATA) disk drive module for use in a data storage system having an enclosure with slots constructed to receive Fibre Channel disk drive modules. The ATA disk drive module comprises an ATA disk drive, an adapter board connected to the ATA disk drive, and a carrier assembly including spaced apart carrier sleds mounted to the ATA disk drive and to the adapter board. The spaced apart carrier sleds have mechanical dimensions that enable the carrier assembly to slide into an enclosure slot constructed to receive a Fibre Channel disk drive module. The adapter board provides an electrical interface and a mechanical interface between the ATA disk drive and a midplane of the enclosure when the carrier assembly is inserted in the enclosure slot and the ATA disk drive module is plugged into the midplane.

Abstract: A composite material is provided that includes an array of machine elements disposed within a matrix material. Each machine element includes a cross-section defining an internal space that is filled with a viscous fluid. Preferably, the machine elements are provided in complementary pairs of tubular members, with the internal spaces of the tubular members communicating with one another. When subjected to a predetermined force, the cross-sections of the tubular members change shape, changing the volume of the internal spaces, and causing fluid to flow into or out of the internal spaces. Preferably, under the predetermined force, one tubular member increases in volume and the other tubular member simultaneously decreases in volume, thereby causing fluid to flow between the tubular elements to dissipate energy from the predetermined force.

Abstract: The present invention comprises a vibration isolating mount used to mount a furring channel to a mounting surface wherein the furring channel comprises a channel portion and two opposing furring channel flanges. The vibration isolating mount comprises a vibration isolator of a size and shape to fit snugly around the furring channel flanges, wherein the vibration isolator has opposing flanges extending away from the furring channel flanges; and mounting brackets, wherein the mounting brackets wrap around the vibration isolator flanges, and wherein the mounting brackets are isolated from the furring channel by the vibration isolator.

Abstract: A console-type ruggedized computer system has a console with components, and an image producing apparatus for displaying images based upon electronic signals received from the components of the console. The computer system further includes at least one shock absorber coupling the image producing apparatus to the console. The (at least one) shock absorber is capable of attenuating shock to the image producing apparatus.

Abstract: A port replicator and a resilient piece used therein. The resilient piece is disposed in the port replicator supporting a portable computer, and comprises a body and an abutting member. The body includes a first portion and a second portion integrally formed with the first portion. The first portion includes a first end connecting with the second portion and a second end opposite the first end. The second end is fixedly disposed in the port replicator. The second portion includes a third end connecting with the first portion and a fourth end opposite the third end. A cross section of the second portion is substantially Z-shaped. The fourth end is fixedly disposed in the port replicator. The abutting member is disposed on the third end and protrudes from the port replicator to abut the portable computer supported by the port replicator. Thus, electromagnetic interference generated from the portable computer is dissipated.

Abstract: A cylindrical mounting apparatus includes: a cylindrical mount having an elastic body elastically connecting an inner and outer sleeve disposed in mutually spaced-apart relation; and a bracket independent of the cylindrical mount and having a pair of support plates opposed to each other with a spacing therebetween. The mount is interposed between the pair of support plates and fastened to the bracket by a mounting bolt extending through a bore of the inner sleeve across the support plates. Two positioning protrusions protrude from an inside surface of one support plate toward the other, and a mounting plate is disposed on one axial end of the inner sleeve extending diametrically. A recessed engaging portion of the mounting plate is brought into engagement with the positioning projections to place the mounting plate in a predetermined position about its center axis on the support plate.

Abstract: A breakaway basketball goal system is provided for absorbing shocks during playing conditions. In embodiments of the invention, the basketball goal system includes a base, a neck movably coupled to the base, a backboard attached to a distal end of the neck, and a shock-absorbing mechanism that permits a neck, backboard and rim to move downward to absorb severe shocks, and that may automatically return them to their playing position. The shock-absorbing mechanism can include a housing disposed on a rearward side of a mounting post, a shock absorber, a guide attached to a movable end of the shock absorber, and a cable connecting the guide to the neck. In embodiments of the invention, the backboard extends a horizontal distance from the base to provide a safe playing area.

Abstract: An earthquake shock damper includes two positioning plates, two fixing plates and multiple energy absorbing plates securely sandwiched between the two positioning plates and having the two fixing plates extending out in different directions. Each energy absorbing plate has a mediate portion with a width smaller than that of two distal ends of the energy absorbing plate so that deformation of the energy absorbing plate is able to smoothly absorb energy from the earthquake.

Abstract: An articulated stand having an adjustment mechanism featuring a hinge-and-wheel assembly. In one embodiment, the present invention provides an articulated, adjustable stand comprising an upwardly extending arm, a downwardly extending leg pivotally attached to the upwardly extending arm, a wheel rotatably mounted to a first end of the downwardly extending leg, and a spring element connecting the first arm member and the second leg member.

Abstract: An apparatus for isolating and leveling a machine foundation with respect to a substructure of a building or the ground. The apparatus of the present invention provides an enclosure connectable to the machine foundation. A load bearing member is disposed within and adjustably connected to the enclosure. A resilient member is positioned between and in contact with the bearing member and the substructure for supporting and isolating the machine foundation from the substructure and providing a leveling mechanism to level the machine foundation. At least one gauge extends between the bearing member and the substructure to determine the distance between the bearing member and the substructure so that the machine foundation may be leveled. Additional stabilizers are provided with an anchor plate assembly adjustably connected to the enclosure. The stabilizers include an isolating member biased against a sidewall of the substructure by the anchor plate assembly to provide added stability to the machine foundation.

Abstract: A vertical mount rubber bushing including a rubber elastic body elastically connecting inner and outer sleeve, wherein the rubber elastic body having cross sectional shapes viewed in a first direction of prizing force input where rubber legs are affixed to an axially center portion of the inner sleeve and extend towards opposite axial ends of the inner sleeve, towards the outer sleeve and away from the inner sleeve to either axial side of the axially center portion, thereby forming depressed spaces partially defined by the rubber legs and situated on either axial side of the axially center portion, and viewed in a second direction orthogonal to the first direction, where main body rubber portions thicker than the rubber legs elastically connect the inner and outer sleeves while extending in the second direction with a shape generally increasing in length in an axial direction moving from the outer sleeve toward the inner sleeve.

Abstract: A fluid mount (10) for an exposure apparatus (32) includes a first subsystem (12) and a second subsystem (14). The first subsystem (12) includes a first cylinder (18) and a first piston (20). The first piston (20) moves within the first cylinder (18) along a first axis (26). The second subsystem (14) includes a second cylinder (22) and a second piston (24). The second piston (24) moves within the second cylinder (22) along a second axis (28). Importantly, (i) the second subsystem (14) is stacked on top of the first subsystem (12), (ii) the second axis (28) is substantially coaxial with the first axis (26), and (iii) the first piston (20) is connected to the second piston (24) with a piston connector (16). The resulting fluid mount (10) has a relatively high load carrying capacity and a relatively small footprint.

Abstract: An exhaust system support structure is provided with a vehicle body bracket, a vibration insulating member and an exhaust bracket. The vehicle body bracket has a base part that is coupled to a vehicle body member, and a pair of support parts extending from the base part. The vibration insulating member is coupled between the support parts. The exhaust bracket has a first end coupled to the vibration insulating member and a second end coupled to an exhaust system member. The vibration insulating member includes a housing part that houses the first end of the exhaust bracket. The support parts can be linked together with a linking part. Vibrational displacement of the vibration insulating member is suppressed by a regulating body protruding from the vehicle body bracket side of the vibration insulating member and a regulating body protruding from the linking part side of the vibration insulating member.

Abstract: The invention relates to a hydraulic bearing, especially for supporting motor vehicle assemblies, that includes a supporting connection, a buttress connection which lies axially opposite the supporting connection and a bearing spring element which is located between these two and which includes (i) an elastomer radial spring, (ii) an expanding spring which is configured as a separate molded elastomer part in the form of a bell-type rolling membrane and which forms part of a hydraulic damping system between the supporting connection and the buttress connection, and (iii) an axially upright steel helical spring. The hydraulic damping system includes a working chamber, a throttle channel and a compensation chamber. A bearing housing radially surrounds the bearing spring element and the hydraulic damping system and is supported by the buttress connection.

Abstract: The invention provides a stabilising device for inclusion in a stack of containers in which hazardous waste is held, wherein the stabilising device comprises a table for supporting a container in the stack, and a base, the table being movable relative to the base so as to aid stability of the stack when the stack is subjected to external forces.

Abstract: The present invention relates to an apparatus that will dampen vibration and sound created by heavy machinery, such as metal presses, metal stampers, and HVAC units, as well as limit lateral movement of the heavy machinery based upon a combination of a multiplicity of air springs and rigid cylinders. The present invention provides the simplest method of dampening vibrations and sounds created by heavy machinery. The present invention further prevents lateral movement of the machinery, while simultaneously providing a means to protect such machinery against seismic events by absorbing the seismic forces.

Abstract: A bi-directional sliding pendulum seismic isolation system for reducing seismic force acting on a structure by sliding pendulum movements, each system comprising a lower sliding plate forming a sliding path in a first direction, an upper sliding plate forming a sliding path in a second direction, and a sliding assembly for reducing the seismic force of the structure by performing a pendulum motion by sliding along the lower and upper sliding plates.

Abstract: Torque roll, such as in a marine propulsion unit for driving a propeller, is significantly reduced or substantially eliminated by utilizing inflatable elements, such as airbags. One or more airbags engage the top of a propulsion unit mounting surface supported by an elastomeric isolation mount where a torque roll force is substantially upward, and one or more other airbags engage the bottom of a mount for the propulsion unit at a location where the torque roll force is substantially downward. The amount of gas supplied to the airbags is preferably substantially proportional to the torque roll force at each of the airbags. By significantly reducing or substantially eliminating the torque roll of the propulsion unit, the unit can be connected to other components without line shaft couplings.

Abstract: The present invention relates to vibration dampening devices that require the benefits of both a highly damped material and a low outgassing material. Such damper needs are required in dampers operating in a vacuum environment. The present invention joins a highly damped material with a low outgassing resilient material resulting in a vibration and shock damper that is highly damped and achieves low outgassing performance. The invention therefore reduces the outgassing of low molecular weight volatiles while at the same time achieving a highly damped vibration and shock damper. Consequently, the dampening qualities of the damper are maintained while the environment in which the damper is operating does not become contaminated.

Abstract: An improvement in the structure of an anti-shock device utilized for buildings, important structures and bridge structures that is comprised of a base, a carrier, a slide block and a plurality of springs. A slip concavity of a sunken round curved recess is respectively formed in the base top surface and in the carrier bottom surface, and an upper slide block member and a lower slide block member are situated between the two slip concavities. One contact surface between the two slide block members and slip concavities is of a curved contour and the other surfaces are indented seating recesses. A spheroid coupling bearing is nested between the two seating recesses and the upper and lower slide block members are held together by the springs. As so assembled, the anti-shock device base is fastened under the columns of a building structure such that the building achieves the objectives of exceptional shock eliminating capability and greater building structure safety.

Abstract: A pneumatic motor vehicle seat, whose static height is held constant independently of the weight of the respective seat occupant. The inventive device provides a magnetically actuated air valve (16) which is enclosed 20 in a plastic valve housing for aerating and deaerating the pneumatic valve. The air valve is controlled by an external permanent magnet and according operates, quietly, cleanly and with little wear. Also a motor vehicle seat includes an integrated height adjustment mechanism, comprising a control system which automatically and simultaneously dampens the vehicle seat vibrations to a maximum, whilst the static height is being adjusted.

Abstract: A presently-preferred embodiment of a gimbaled flywheel system mountable on a supporting surface comprises a first and a second pivot each being adapted to be mounted on the supporting surface. The gimbaled flywheel system also comprises a mounting frame comprising a first frame member coupled to the first pivot, an opposing second frame member coupled to the second pivot, and a third and an opposing fourth frame member each being fixedly coupled to the first and the second frame members. The gimbaled flywheel system further comprises a plurality of flywheel units each comprising a casing pivotally coupled to the third and the fourth frame members, and a flywheel rotatably coupled to the casing.

Abstract: In a vibration isolator wherein an inner and an outer cylindrical fittings are connected by a rubber elastomer between both fittings; in the rubber elastomer above and below the inner cylindrical fitting, hollow spaces are formed circumferentially in a larger width, in a cross-section square to the axial direction, than an outside diameter of the inner cylindrical fitting; and lateral portions as support arms of the rubber elastomer between the hollow spaces support the inner cylindrical fitting to the outer cylindrical fitting, in order to lower the dynamic spring rate in the lateral direction square to the axial direction and facilitate the tuning of rigidity, without changing the vibration-isolating characteristics in the vertical direction and without deteriorating the durability, small vacancies are provided in the lateral portions at a distant position inboard from the outer cylindrical fitting.