Abstract: An isolating mount, such as for an engine, comprises a rigid bushing with a resilient rubber block molded around it and cavities formed in the block opening to its exterior on opposite sides of the bushing, preferably located along a plane parallel to the longitudinal axis of the bushing. End plates are bonded to the block surrounding the open ends of the cavities, and these plates may have flanges thereon coated with rubber. Optional floor plates may be incorporated in the block at the bottoms of one or both cavities. Covers are held in sealed relation over the cavities, as by forming the flanges around the covers to retain them. A passage is formed between the cavities, and the cavities and passage are filled with a liquid which is confined therewithin. Displacement of the block in response to forces acting on the mount will result in distortion of the cavities and corresponding displacement of the liquid from one of the cavities to the other to damp motion of the block.

Abstract: A mount for connecting two relative-vibratable objects has two resilient elements and a signal actuated clutch for connecting the objects. The clutch is in parallel with one of the resilient elements and in parallel with the other. A sensor senses the vibrations applied across the mount and actuates the clutch in response thereto to change the transfer function of the mount. Appropriately controlling the engagement/disengagement actuation of the clutch in this way makes it possible to avoid the resonant frequencies of the mount and thus both isolate and damp the vibrations as desired without structural changes to the mount.

Abstract: A vibration absorbing mounting for a vehicle engine incorporates hydraulic damping by means of a pair of liquid filled chambers (20,21) which are separated by a thick rubber intermediate diaphragm and communicate via a restricted passageway (32). A gas spring acts on one chamber and a piston (67) sealed by a reinforced rolling-lobe diaphragm (55) acts on the other chamber, the reinforcement of the rolling-lobe diaphragm providing low rolling resistance while maintaining high bulge stiffness.

Abstract: A hydraulic-elastomeric mount has a pair of liquid filled chambers formed by elastomeric walls and separated by a rigid partition having an orifice that connects the chambers to effect damping. The partition supports a rigid damping decoupler for free reciprocal movement between oppositely facing rigid sides of the partition so as to effect cyclic volume change in the chambers to eliminate damping under certain conditions. A tapered elastomeric cushion is added to the decoupler to both cushion and cause rocking of same to prevent noise thereby.

Abstract: An assembly is disclosed for mounting a vibrating body to a support structure, being particularly adapted for use as an engine mount system for a motor vehicle.

Abstract: A fluid-containing power unit mounting device capable of effectively damping vibration in a wide range of frequency is shown. The damping function of the device is accomplished by a mounting rubber forming an internal fluid-containing chamber between a power unit and a chassis, a partition plate dividing the chamber and including a plurality of valve mechansims in series and an orifice communicating between both sides of the chamber.

Abstract: An adaptive, controlled vibration mount comprises a base and a load support arranged for relative vibrational motion; a restoring spring mounted between the base and the load support; and an arrangement for applying selected variable Coulomb frictional damping to the relative vibrational motion such that the amount of variable frictional damping increases non-linearly as a function of increasing amplitude of the relative vibration motion.

Abstract: A liquid-filled type vibration damping structure consisting of a liquid-filled vibration isolator and a bracket member in which the liquid-filled vibration isolator comprises first and second frames each to be mounted on a vibration source side such as power unit and on a vehicle body side, a resilient member provided between the first and second frames, a baffle member secured on the first frame and dividing the internal space surrounded by the resilient member, a diaphragm and one of the frames into two liquid chambers, said baffle member further having a ring-shaped orifice portion so as to damp a low frequency band vibration through the orifice portion.

Abstract: A pneumatic suspension system between relatively-vibratable structures has a single expansible pneumatic working chamber for pneumatically isolating the vibrations between the structures and inlet and outlet valves responsive to a control for opening only one at a time in response to vibrations which exceed respective vibration thresholds. The valves then admit or vent gas from the working chamber to damp vibrations in the threshold-determined range which includes resonance.

Abstract: A damping element for damping three-dimensional and torsional oscillations, in particular in hand tools, is proposed. The damping element includes an approximately bell-shaped rubber spring element defining a cavity which is filled with a damping fluid. The cavity is closed off at its open end with a rubber diaphragm. Within the cavity there is mounted at least one partition which defines overflow conduits or passages, and additional partitions at an angle to the partition defining the overflow conduits. The partition defining the overflow conduits is rigidly joined to a fastening sleeve situated in the rubber spring at the end thereof opposite to its open end.

Abstract: Vibrations of heavy equipment, such as textile machinery, are isolated, that is prevented from entering into the supporting floor, by inserting a vibration isolating device between each equipment frame member forming a machine foot and the floor. The device includes a hydraulic damper and up to three sets of springs, preferably sets of concentrically arranged helical springs. The springs are mounted between upper and lower spring mounting elements. The spacing between these upper and lower mounting elements is adjustable by a threaded bolt for adapting the load bearing capacity of each set of springs to the respective machine foot load. Thus, individual springs in a set or an entire spring set may be withdrawn from a load bearing function for providing each machine foot, for example of a weaving machine, with the individually required vibration insulation at each machine foot.

Abstract: A suspension device for a vehicle seat has a lower frame secured to a vehicle floor, an upper frame disposed above the lower frame in parallel for mounting the vehicle seat, link plates disposed in parallel on the front side and the rear side of a vehicle for connecting the lower frame and the upper frame, torsion springs disposed near the connecting portion of the link plates for imparting elastic support force to the link plates, and a shock absorber disposed between the lower frame and the upper frame for damping the relative vibration of the above two frames.

Abstract: A frictional damping assembly operated by a load bearing air spring together provide damped, pneumatic load bearing support for a telescoping load bearing assembly. The strut is particularly suitable for use in front and/or rear suspensions of passenger vehicles.

Abstract: A hydraulic-damping rubber mounting for motor vehicles, particularly for engines of such vehicles, has two rigid end walls which are disposed opposite to each other in the axial direction, and at least two fluid chambers which are disposed axially one behind the other, for containing damping fluid. The chambers communicate with each other through a throttle means. A partitioning wall which delimits and separates the two chambers is axially movable, and is pressed against a sealing surface by way of a prestressed rubber spring so that, at large amplitudes, the reduced pressure which normally might cause cavitation in a chamber is eliminated by way of a bypass opened by stressing the rubber spring so as to open communication at the sealing surface, such that no interfering noise effects occur.

Abstract: A fluid-filled engine mount device comprises an annular elastic block having inner and outer peripheral sections one of which is connected to a power unit side and the other connected to a vehicle body side; an annular elastic member connected to the elastic block; a partition plate member connected to and elastically supported by the annular elastic member, the partition plate member being formed with an orifice and defining between it and the elastic block a fluid chamber capable of being filled with a fluid; and a diaphragm member disposed in connection with the partition plate member and defining between it and the partition plate member an auxiliary chamber capable of being filled with the fluid, the auxiliary chamber being in communication with the fluid chamber through the orifice thereby effectively damping high frequency fine vibration applied from a power unit.

Abstract: Viscoelastic damping material (45, 80 and 105) effectively damps the resonant responses of a mirror (10) and a mount (12) therefor to vibratory disturbances thereof by such phenomena as pressure pulses in a pulsed chemical laser cavity.

Abstract: A hydraulic vibration damper is intended for resilient bearings in motor vehicles and comprises in a housing an inner space which is divided by a partition into a working space above and a lower equalization space, with the two spaces being connected to each other by flow apertures in the partition and their volumes being variable. The partition encloses a horizontal flow channel communicating with the working space and the equalizing space, respectively, through connecting holes which are offset relative to each other. In addition, valve apertures with closing bodies are provided in the partition, which close automatically under increased pressure in the working space.

Abstract: A vibration-proofing device according to the present invention includes at least one fluid chamber in which fluid is filled between a vibrating member and a vibrated member. The fluid chamber is formed which expands and contracts from the vibration of the vibrating member. In the fluid within this fluid chamber, opposite phase pulsations are generated by means of a vibrator. The vibrator comprises an almost plate-shaped member fabricated from a magnetic material, which makes up one part of a partition forming the fluid chamber. The vibrator is activated by solenoids.

Abstract: A damper which comprises a damper housing and a damper plunger in which the damper plunger comprises a top plate for the reception of an object that is to be damped, and a plunger tube. The plunger tube is frustoconical in configuration and can be moved into and out of a damping medium present in the damper housing, the larger cone diameter end of the plunger tube being directed into the damper medium.

Abstract: A column support for buildings is presented which protects the building from potentially damaging earthquake ground motions. In each of these column supports the weight of the building is supported by an articulated slider that may slide translationally on an underlying concave spherical surface. The pivot point of the articulated slider is substantially near to the interface of the slider and concave surface. The slider is inherently stable for all dynamic loadings, provides reliable hysteretic friction damping, and can support high loads. A highly effective support is achieved, with small amplitude pendulum motions of the support which function to absorb severe earthquakes.

Abstract: A resilient bearing includes a cushioning member comprising an inner part, an annular element of a resilient material, and an outer part or shell, and a hydraulic damper having an inner space filled with a liquid and being divided by a partition into a working space and an equalizing space. The partition is provided with throttling passages for the liquid flowing therethrough, and the volumes of the separated spaces are variable. The hydraulic damper is accommodated in a housing which is independent of the cushioning member, and comprises a piston which is movable up and down in the working space, thereby varying the volume of the space, and is connected, directly or indirectly, to the inner part of the cushioning member.

Abstract: An object to be isolated from vibrations is supported by a structure having a curved surface which contacts the object. The support structure is in turn coupled to a resilient spring-like support frame which allows the structure to move in response to vibrations. Also contacting the support structure are three isolation elements which sense the vibration forces and produce forces to counter the vibrations.

Abstract: A vibration absorbing mounting, e.g. a motor car engine mounting, has a rubber spring member mounted between end members and hydraulically damped. The interior of the mounting comprises two liquid-filled chambers communicating with one another through a restricted passageway and which are separated by an intermediate diaphragm and bounded at their other sides, respectively, by the rubber spring member and a second diaphragm. The second diaphragm is provided with a central support and the intermediate diaphragm may have an unyielding central portion, to enable excessive movement of the end members towards one another to be resisted.

Abstract: The attenuator has a chamber filled with hydraulic fluid and bordered by a diaphragm effective to impart oscillatory movement to a slug of such fluid. During high frequency excitation the inertial forces of the oscillating fluid slug minimize the dynamic stiffness of the attenuating device. The particular excitation frequency at which the foregoing occurs is controlled by an annular tuning plate or assembly disposed in non-engaging relationship to the diaphragm and having an opening which may be adjustable in size either automatically or manually.

Abstract: A frictionless hydraulic damper including a cylinder having end walls mounting the opposite ends of a shaft with a clearance in labyrinth seals, bellows seals between each end wall and the portions of the shaft extending beyond each end wall, a piston head on the shaft within the cylinder, hydraulic fluid in the cylinder and in both bellows seals, an orifice construction located relative to the piston head for permitting flow of hydraulic fluid past the piston head to produce damping, and a conduit in the shaft for effecting communication between the two bellows. The damper as described above also functions as a snubber by including a valve construction which selectively closes the orifice construction.

Abstract: An apparatus for resiliently mounting a vibrating body, has a mounting bracket and a pedestal interconnected through a resilient element to define a liquid-filled hollow space. A compensating baffle bounds at least 10% of the liquid-filled hollow space and is moved by a positioning element to compensate for pressure variations in the liquid caused by vibrations, of the body. The positioning element is actuated by a primary element which detects the vibrations of the body, through a freely programmable control unit.

Abstract: A damper device including first and second support members, one of which is fixed to a support element and the other of which is fixed to a suspended element, an elastic block made of a deformable, elastic material for elastically coupling the two support members and a sealed space formed therein filled with a liquid. One partition member has its periphery fixed to the first support member and divides the sealed space into two chambers. The partition member has therein a member movable along a short distance. Fluid passages are formed in a wall portion of the first support member so as to communicate between the two chambers and to impart flow resistance to the liquid flowing therethrough. The partition member can be suspended to the first support member by an elastic sheet and be movable along the axial direction of the first support member. A solenoid is mounted on the inner wall of the first support member. When the solenoid is energized, the partition member can be fixed to the first support member.

Abstract: A rubber vibration insulator comprising a boss member as one fitting, a tubular body, an annular elastic member interposed between the boss member and one end of the tubular body, a plate member as the other fitting surrounding fixedly the opposite end of the tubular body, thus forming together with the aforesaid elements a sealed chamber having variable volume, and a capsule housed in the sealed chamber, in which a damping liquid is filled. The capsule comprises an external shell consisting of a rubber plate having an orifice and a plate body joined together and a diaphragm disposed transversely in the shell, thereby dividing its internal chamber into an air sub-chamber on the rubber plate side and a liquid sub-chamber on the plate body side. The rubber plate of the shell may be defined with recesses on both sides in a vertical symmetry and dispersedly to form thin film portions or be in the form of a thin rubber plate which is interposed between two porous plates at a clearance and play between them.

Abstract: A vibration damping device is provided inserted between a fixed support (1) and a mobile member (2), comprising a main resilient element (4) inserted between the support and the member and a damping system mounted in parallel across the main resilient element and comprising a frame (8) connected to the mobile member and a piston (11) bathing in a damping medium contained in a bowl, (5) integral with the fixed support, the piston being mounted on the frame through a sleeve (9) made from a resilient material.

Abstract: A hydraulically damped motor mount for motor vehicles, and similar elastic supports having a controlled damping device, the free cross-sectional flow of which is statically closed off by a flexible diaphragm which is held with a certain freedom of movement between rigid support plates. In order to improve the acoustical behavior of such mountings, and to suppress the noise associated with the change in direction of the spring movements, the inner peripheral region of the support plates which embrace the diaphragm, and which overlap the edge of the latter, is provided with successive indentations in the form of gaps between teeth in such a way that the frictional forces generated by the approach of the diaphragm onto the support plates in the damping fluid is kept low. The inventive configuration of the support surfaces results in the elimination of undesirable tapping noises when the placement of the diaphragm has advanced partially.

Abstract: A fluid-sealed engine mounting comprising a connector for being connected to an engine, a base for being mounted on a vehicle frame, and an elastic member joining the connector to the base, the connector, the base, and the elastic member jointly defining a fluid chamber in which a fluid is sealed. The fluid-sealed engine mounting has a variable-volume member mounted on one of the connector and the base in the fluid chamber and containing at least a gas sealed therein, the first variable-volume member being expandable and contractable in a direction in which vibrations are transmitted in the fluid chamber.

Abstract: A frictional damping assembly operated by a load bearing spring assembly, either an elastomerically damped coil spring or a reinforced elastomeric spring, together provide damped, resilient load bearing support for a telescoping load bearing assembly. The strut is particularly suitable for use in front and/or rear suspensions of light weight passenger vehicles.

Abstract: A vibration isolating apparatus employed for mounting, for example, the engine of an automobile includes a tube communicated with a hollow chamber which is expanded and contracted by vibrations generated in the engine. The tube is provided therein with a mass member which has a larger density than that of a fluid sealed inside the hollow chamber. The mass member is movable by means of the circulation of the fluid inside the tube. Accordingly, the mass member encourages the occurrence of resonance of the fluid inside the tube, whereby the vibrations are absorbed by means of the air-column resonance.

Abstract: A hydraulically damped elastic engine mounting having a ring-shaped rubber spring member which takes up static and dynamic loads and is equipped with a damping disk immersed in a damping fluid in order to provide hydraulic damping. The damping disk is movably mounted with axial play between spherical or conical buffer surfaces, and is provided in the vicinity of the buffer surfaces with passages through which the damping fluid can flow. The free path of the disk governs the damping applied, and at the same time prevents undesirable impact noise by the special design of the parts which move in relation to each other. Moreover, the damping disk may be constructed in such a way that interfering cavitation phenomena produced in the two surfaces are suppressed. This ensures that the damping device is fully effective in all vibration ranges and under all conditions occurring while the vehicle is being driven.

Abstract: An anti-vibration apparatus for reducing seismic acceleration is disclosed wherein X-axis direction linear motion means are horizontally displaceably mounted on X-axis direction rails installed on a foundation, and mounted on the X-axis direction linear motion means are Y-axis direction rails through Y-axis direction linear motion means or directly, and X- and Y-axis direction tension springs are disposed between the foundation and the X-axis direction rails and between the X-axis direction linear motion means and the machinery mounting platform, whereby the X- and Y-axis direction linear motion means are adapted to support transverse upward as well as downward loads together with the X- and Y-axis direction rails. The machinery mounting platform may additionally pivotally carry thereon another machinery mounting platform through articulated lever mechanisms using the former platform as a support frame.

Abstract: A vibration-absorbing engine mounting device with fluid damping which comprises: an upper mounting member, a lower mounting member, a rubber wall body interposed between both the mounting members with its upper and lower portions being air-tightly bonded to the upper and lower mounting members, respectively, a block damper transversely provided in the rubber wall body, and a capsule encased in a space enclosed by the former four members, thus defining a closed chamber enclosed by the former five members. The capsule comprises an exterior rigid case, an interior sealed bag encapsulated in the rigid case, defining a sacciform chamber and an orifice member entering the former two. The closed chamber and the sacciform chamber are filled with fluid, whereby they are put in communication with one another by the passage of fluid via the orifice member.

Abstract: An elastically damping device for the suspension of an engine of a vehicle, by which the engine vibrations are prevented from being transmitted to the body of the vehicle, is disclosed. The damping device is provided with a first fluid chamber and a second fluid chamber, each of which is defined by an elastically deformable wall. The fluid chambers are separated from each other by means of a partition plate, of which at least one portion is formed into a movable plate being movable in such a direction as to lower the increased inner pressure of the fluid chambers, and which has a restricted passageway for communicating the fluid chambers. The damping device of the present invention further comprises two stopper portions for stopping the movement of the movable plate and an electromagnetic coil for operating one or two stopper portions so as to control the movable distance of the movable plate in accordance with the driving condition of the vehicle.

Abstract: A fluid-sealed engine mounting has a connector adapted to be connected to an engine, a base adapted to be connected to a vehicle frame, an elastic member joined between the connector and the base and elastically deformable in response to vibrations transmitted thereto, the connector, the base, and the elastic member jointly defining a fluid chamber in which a fluid is sealed, and a partition dividing the fluid member into a first chamber adjacent to the connector and a second chamber adjacent to the base, the partition having an orifice through which the first and second chambers communicate with each other. The engine mounting also includes a diaphragm mounted on the base or the connector for varying the volume of one of the first and second chambers when vibrations are transmitted to the engine mounting.

Abstract: Apparatus for controlling the jerk or shock loading of the wire rope used to apply tension to move a galvanizing or pickle line's horizontal looper car. The apparatus includes a vertical spindle affixed to the frame of the looper car. A drum having a radially extending arm is provided to be rotatable about the spindle. The arm is provided with an intermediate region to anchor the wire rope and a terminal region to cooperate with a resilient shock absorbing means which may comprise a polyurethane pad. Such shock absorbing means includes a bracket affixed to the looper car frame. A spring-biased bolt connects the arm to the bracket while a resilient pad is provided intermediate the arm and the bracket.

Abstract: In this mount, the two liquid-containing chambers (15, 16) are separated by a single-piece member (10) of elastomer which comprises a central movable portion (13) connected to a massive peripheral portion (11) by a thin web (12) in the form of a circular wave. Defined between the periphery of the peripheral portion (11) and the end elements (4, 7) of the mount is a circular passageway (19) which has an extent of more than a turn and connects the two chambers to each other. This mount is easy to construct and ensures both a good filtering of high-frequency and small amplitude vibrations due to imperfections in the balancing of the engine and a good damping of low-frequency and large amplitude trembling coming from the road.

Abstract: A plate spring is operatively connected to an automotive internal combustion engine so that when the engine vibrates with a relatively high frequency and small amplitude, the plate spring is merely moved backwards and forwards across an essentially flat home position wherein it exhibits a zero or even negative spring constant, and so that when the engine vibrates with a relatively low frequency and large amplitude, the spring is flexed to the degree of exhibiting a high spring constant and thus transmits the vibrational energy therethrough to a resilient body or unit interconnecting same with the vehicle chassis.

Abstract: Herein disclosed is a damper device which is so constructed that a main sealed chamber is formed between one mounting member and the other mounting member by an elastic rubber member providing connection in between, that an auxiliary sealed chamber is formed at the opposite side of the other mounting member to the main sealed chamber by an elastic cover, that the main sealed chamber and at least a portion of the auxiliary sealed chamber are charged with a liquid, that the main sealed chamber and the auxiliary sealed chamber are partitioned by such a partition as is made movable in the direction jointing the two chambers and as is arranged to have its movable range restricted, and that a slot passage is formed between said partition and a wall surrounding the latter.

Abstract: A rubber vibration isolator is disclosed, which comprises a pair of upper and lower liquid chambers capable of changing volumes by elastic deformation of an annular rubber elastomer accompanied with longitudinal vibration, a restricted passage for communicating these chambers with each other, at least two liquid chambers formed in the outer periphery of the elastomer and capable of changing volumes accompanied with lateral vibration, and another restricted passage for communicating the latter chambers with each other.

Abstract: Adjustable damping is provided for the seat bottom cushion of a vehicle seat of the type having a seat frame which is mounted at a stationary position on the vehicle floor. A resilient seat cushion is mounted upon the seat frame and is resiliently compressed relative to the frame by the static occupant load when the occupant sits upon the seat bottom cushion. Occupant movement causes the further resilient movement of the seat bottom cushion above and below the static vertical position. A scissors mechanism acts between the vehicle body and a plate attached to or embedded in the seat bottom cushion to translate the vertical movement of the seat bottom cushion into a horizontal movement of a portion of the scissors mechanism. An adjustable damping device such as a dash pot is operatively connected to the horizontally movable portion of the scissors mechanism whereby the vertical movement of the seat bottom above and below the static vertical position is adjustably damped to provide a desired occupant ride.

Abstract: A passive support structure comprises rigid compression members in which only compressive forces are generated, and extendable tensile members, which elongate as necessary to accommodate externally applied forces. The structure incorporates two spaced members, a lower base member and an upper support member, interconnected by a plurality of rigid compression members, the ends of which are pivotally attached to both the base and the support member. Because of the pivotal connections, only axial compressive forces can be generated within the compression members. Also interconnecting the base and support members are elastic tensile members, which yield as necessary to accommodate the applied force, and in which energy absorbing and dissipating elements can be incorporated.

Abstract: The shock absorber interposed between two pieces (1,3) comprises a sealed case with a deformable ring (4), a dividing wall (5) dividing the inside of the case into two compartments filled with liquid, a restricted passage (11) formed in a rigid ring (8) forming the periphery of the dividing wall and an impervious and continuous membrane (10) forming the center of the dividing wall. The periphery of one of the faces of the membrane is bonded to a flat annular bearing surface of the ring, a rigid floating washer (16) is added to the periphery of the other face of the membrane and two annular dividing walls (19 and 22) of the membrane mate on the inside with the ring and the washer.

Abstract: An elastically damping device for the suspension of an engine comprises a conical first fluid chamber which is formed in the bottom portion of a frustoconical elastically deformable block, and a second fluid chamber which is formed on the upper surface of the block by fixing the open end of an elastically deformable thin sheet thereto. The top portion of the first fluid chamber and the second fluid chamber are interconnected to each other by way of an open passageway which is formed in the block. The first fluid chamber, the second fluid chamber and the open passageway are filled with a liquid. This device is supported on a body of a vehicle by a first supporting plate which is connected to the under surface of the block and the engine is mounted on the block by a second supporting plate which is connected to the upper surface of the block.

Abstract: An engine mount device comprises first and second base plate members; an elastic block securely interposed between the first and second base plate members and formed with a cavity; a partition plate member connected to one of the first and second base plate members and formed with an orifice; a diaphragm member connected to the one of the first and second base plate members and defining an auxiliary chamber between it and the partition plate member, the auxiliary chamber being in communication with the fluid chamber through the partition plate member orifice, at least a part of the fluid and auxiliary chambers being filled with a fluid; and a rigid ring disposed around the intermediate section of the elastic block thereby restricting the expansion of the elastic block; the elastic block and the rigid ring serving as a dynamic damper for damping vibration having predetermined frequencies, thereby rendering unnecessary installing the dynamic damper independent from the engine mount device.

Abstract: A vibration damper of viscous damping type for damping low-frequency (10 to 20 Hz) vibrations has at least one subpassageway oblique to the axis of a main passageway. Since vortexes are generated around the main passageway as damping fluid passes through the subpassageway, the fluid can effectively reciprocate through the main passageway in response to pressure gradients induced by the vortexes, thus increasing the damping force generated as the fluid flows through the main passageway. Further, since the frequency at which the maximum flow rate, that is, the maximum damping factor can be obtained is determined on the basis of the dimensions of a passageway, the dimensions of the main passageway and the subpassageway are selected so as to match the maximum-flow-rate frequency of the subpassageway with that of the main passageway.

Abstract: A mount for securing together two relatively displaceable bodies, such as a motor-vehicle engine and a vehicle chassis, with limited relative freedom of movement has a substantially closed liquid-filled chamber formed by a first resiliently deformable wall and a second wall which may be rigid or resiliently deformable. A partition subdivides this chamber into a pair of compartments and has an elastically deformable and relatively stiff portion and an elastically deformable and relatively yieldable portion. One of these portions is formed with a throughgoing orifice. Stops are provided on each side of the relatively yieldable portion to limit the deflection thereof so that low-amplitude vibrations are not transmitted between the bodies, but high-amplitude vibrations are damped when the yieldable portion abuts the stops.