Abstract: A spring element with hydraulic damping includes a rubber-elastic peripheral wall and two rigid end walls defining a chamber therebetween, an electroviscous fluid filling the chamber, a stack of at least two metal plates disposed in the chamber, and elastic rubber elements disposed between and maintaining mutual spacings between the metal plates, the metal plates being alternately connected to a voltage source and to ground potential.

Abstract: A buffer device for the spiral housings of water turbines wherein the housing includes an extension located along the axis of the inlet conduit into the housing and wherein a hydraulic cylinder and piston assembly is disposed between the extension and a fixed support with a fluid conduit extending between the housing and the cavity of the hydraulic cylinder and piston assembly.

Abstract: A hydraulically damped motor mount comprises a bearing plate, annular resilient element and a bottom plate forming a working space which is connected through a choke opening to a liquid-filled equalization space of variable volume. A partition formed from a soft-elastic material is provided between the two spaces. The partition forms a seal at its circumference. The partition is provided with at least one cut which severs the partition substantially without removal of material. This cut provides a breakthrough for hydraulic liquid to flow through the partition between the working space and the equalization space when a selected value of hydraulic pressure is exceeded.

Abstract: The invention relates to an antivibratory support to be fitted between the chassis and the engine of a vehicle, which support comprises two deformable chambers filled with liquid (12) and communicating with each other through a constricted passage (11), namely a work chamber (A) defined by a bowl (1) connected to the chassis, by a thick resilient ring (7), by an internal bell (8) connected to the engine and plunging into the bowl and by a dividing wall (10) closing this bell, and a compensation chamber (B) defined by the dividing wall and by a bellows (9) inside the bell. The bowl comprises a re-entrant flange (3) and the bell a peripheral bead (8.sub.1) covered with an annular rubber shoe (13), which cannot pass through the opening defined by said flange.

Abstract: The articulation comprises an inner armature (4, 9) and an outer armature (5) interconnected by a mass (3,8) of elastomer, in which are formed two chambers (6, 7) filled with liquid and interconnected through a passageway (13). The articulation is formed by two elements (1, 2) each constituted by part (4, 9) of the inner armature and a part (3, 8) of the mass of elastomer defining cavities (6,7) which allow an axial removal of the mould, one (1) of the elements further comprising the outer armature (5) while the other element (2) comprises a secondary armature (10). The outer armature (5) and secondary armature (10) are interconected by a setting operation after having axially clamped together the two elements (1, 2).

Abstract: The invention provides a hydraulic antivibratory support interposed between a vehicle chassis and engine, including a work chamber (A) and a compensation chamber (B) filled with liquid and joined together through a nozzle (19) whose section, which determines the frequency of the best damped oscillations, can be modified even during operation of the support. This nozzle is defined at least partially by a deformable wall (20) and modifications of the section of the nozzle are obtained by deforming the wall.

Abstract: The support is particularly compact, simple in construction and very reliable in operation. It comprises a main composite unit (1) comprising a first fixing element (3) and a mass of elastic material (2), this mass forming, on one hand, a massive portion (6) of a roughly frusto-conical general shape disposed between the first fixing element (3), part of this main unit between the two armatures (4, 5) being gripped between a housing (8) and a cover (9) fixed to each other and constituting a second fixing element. The housing defines with the elastic mass a work chamber (11), an expansion chamber (12) and a communication passageway (13) interconnecting with the chambers.

Abstract: A hydroelastic mount for interposition between two units to be insulated from each other, for example a motor-drive unit and the structure of a motor vehicle, the mount comprising an elastic mass (1) disposed between two carrying armatures (17, 18), two chambers (6, 12) which are filled with liquid, interconnected by a communication passageway (8) and at least partly defined by elastic walls (1, 13). The two chambers (6, 12) have an annular shape and the mount defines a central empty space (21) for the passage of a connecting rod (20) between one of the carrying armatures (18) and the unit to which it is connected. This arrangement simplifies the assembly when the unit to be insulated is placed thereunder.

Abstract: A hydraulic-elastomeric vehicle engine mount basically comprising a pair of rigid mounting members, a hollow elastomeric body connecting the members, an elastomeric diaphragm cooperating with the body to form a closed cavity that is filled with a liquid, a partition dividing the cavity into a chamber enclosed by the body and a chamber enclosed by the diaphragm, a damping orifice connecting the chambers so as to provide hydraulic damping as one mounting member is forced to vibrate relative to the other in opposite directions, and a damping decoupler mounted for limited movement on the partition so as to effect cyclic volume change in the chambers and thereby permit vibratory amplitudes without hydraulic damping.

Abstract: A pneumatic spring element includes a rubber-elastic peripheral wall and two rigid end walls defining a chamber therebetween, a bellows-like spring body disposed inside the chamber defining an outer sub-chamber between spring body and the peripheral wall, the spring body being subjected to compressed air in the interior thereof, and an electroviscous fluid filling outer sub-chamber and being controlled by an electrical field.

Abstract: A discharge ring supporting structure of an adjustable-blade axial-flow turbine comprises upper and lower halves separated along a horizontal plane passing through the central axis of the discharge ring. The lower half of the discharge ring is supported by a plurality of supporting columns, each having upper and lower supporting members. The upper supporting members are detachably connected between the lower half of the discharge ring and the lower supporting member. When it is desired to remove the runner, the discharge ring is separated into the upper and lower halves, and the upper supporting members of the supporting columns are removed so that the discharge ring can be lowered. Lowering of the discharge ring allows the runner to be lowered and then removed axially without the runner blades contacting the discharge ring. The upper supporting members of the discharge ring supporting columns are provided with a vibration damper for damping vibration in the discharge ring.

Abstract: A vibration isolating apparatus comprises an upper bed which is placed with an object thereon, a lower bed which directly receives a vibration caused by an earthquake, a support mechanism for supporting the upper bed so that the upper bed is relatively displaceable with respect to the lower bed in a horizontal direction with a small friction, a plurality of guide members separated from each other and provided on the upper and lower beds, a wire member provided around the guide members in a form of a loop, and a spring mechanism for absorbing a tension in the wire member depending on a deformation of a shape of the loop formed by the wire member due to a displacement of the lower bed with respect to the upper bed caused by the earthquake.

Abstract: A mounting system for a vehicle engine including mounting units located at the opposite sides of the engine output shaft. The mounting unit includes a hydraulic chamber filled with hydraulic liquid. The hydraulic chamber of one unit is connected with that of the other unit through a conduit which may be provided with a variable orifice or a valve. The variable orifice or the valve is operated so that the fluid flow through the conduit is restricted or cut-off under a specific rolling frequency range.

Abstract: A hydraulic mount has a flexible decoupler with an opening therethrough and grooves intersecting therewith providing a controlled fluid connection between liquid filled chambers to control the damping. Fluid flow between the chambers is restricted as the flexible decoupler contacts one of two sandwiching valve portions, formed as part of a partition member, and further fluid flow is allowed only through the decoupler grooves.

Abstract: An engine mount with hydraulic damping, includes at least one fluid-filled working chamber having a substantially conical shell-shaped rubber-elastic peripheral wall serving as a support spring, a support ring being connected to the peripheral wall and having an upper surface, a thrust element with adjustable radial stiffness in the form of a holding plate vulcanized to the upper surface of the support ring and closing the working chamber along with the support ring, the holding plate having a central cylindrical portion projecting freely into the working chamber and having an inner surface, a bell-shaped expanded ring projecting from the inner surface on the cylindrical portion toward the peripheral wall and having a free end, and a rubber-elastic membrane closing the free end of the expanded ring enclosing a volume of air.

Abstract: A fluid-damping vibration-isolating support device comprising a main support body having a rubber base member and a closed enclosure internally thereof; and a partition plate dividing the enclosure into two chambers which intercommunicate through an orifice and are filled with a liquid. The partition plate comprises a separator member and a stopper member. The separator member is formed of an outer peripheral thick wall portion having an orifice and an inner thin flat plate portion having at least one through-hole. The stopper member has two opposed plate sections provided so as to cover the through-hole and is captured to the separator member slightly movably to the degree that the plate sections are in contact with or separate from both faces of the flat plate portion. The stopper member serves to close upon low frequency vibration and open upon high frequency vibration, so that in the high frequency region rise of hydraulic pressure can be suppressed and dynamic spring rate can be lowered.

Abstract: A fluid-filled resilient bushing including an inner sleeve, an outer sleeve with a plurality of apertures, a sealing sleeve fitted on the outer sleeve, so as to fluid-tightly close the apertures, and an annular resilient member interposed between the inner and outer sleeves so as to resiliently connect the inner and outer sleeves. The resilient member has a plurality of pockets alinged with the apertures. The bushing further includes a plurality of arcuate partition walls disposed in the pockets, respectively, and a plurality of orifice members. Each partition wall is formed as integral parts of the resilient member, so as to divide a radially inner portion of the corresponding pocket into two parts which are spaced apart from each other in an axial direction of the bushing.

Abstract: A vibration isolation mount for elastic suspension of an automobile engine having a body containing a dampening liquid controlled so as to maximize the dampening of low frequency oscillations having a high amplitude and to minimize high frequency oscillations having a small amplitude. The flow of dampening liquid between two chambers is controlled by a pair of bell-shaped elements nested together to form a conduit therebetween. The bell-shaped elements can be rotated with respect to each other, preferably by an electric motor, to open and close perforations in the bell-shaped elements.

Abstract: A fluid filled vibration isolator having a housing having a pair of chambers for containing a working fluid, an inertia track passageway a decoupler means cooperable with the inertia track to control fluid flow having a decoupler disc that utilizes a hydrodynamic fluid wedge to center the decoupler disc and minimize friction while providing a positive and quiet coupling and decoupling action.

Abstract: A two-chamber engine mount with hydraulic damping includes a cup-shaped housing having a cylindrical wall with an inner surface and a given height, an open upper end and a bottom. A frustoconical rubber-elastic bearing spring with inner and outer surfaces, a base region and substantially the given height is disposed in the housing. An engine mount plate is supported on the bearing spring. A flexible-volume, rubber-elastic diaphragm closes off the open upper end of the cylindrical wall. The inner surface of the support spring and the bottom of the housing defines a working chamber and the outer surface of the bearing spring, the inner surface of the cylindrical wall and the diaphragm defines a compensating chamber. The base region of the bearing spring has a transfer port formed therein interconnecting the working chamber and the compensating chamber.

Abstract: A fluid-filled resilient bushing including an annular resilient member interposed between inner and outer sleeves, and a stopper block having a pair of stopper portions disposed in respective fluid chambers defined by the outer sleeve and the resilient member. The chambers are located opposite to each other in a first direction in which the bushing receives vibrations. The two chambers, filled with an incompressible fluid, communicate with each other through an orifice. The stopper portions extend from the inner sleeve toward the outer sleeve. Each stopper portion has a radial end face having an edge which is spaced apart from a periphery of the corresponding fluid chamber in a second direction perpendicular to the first direction, so as to define an annular spacing. A damping member is provided on the radial end face of at least one of the stopper portions.

Abstract: Axially and radially-loadable bearing which damps in an axial direction for elastic mounting of machines, machine parts, and/or vehicle parts. This bearing has an outer part and two elastomeric or rubber springs located between an inner, often rotating, part and an outer part, which form a cavity area which is preferably filled with damping fluid and in which there is a partition separating the cavity into two chambers. The partition comprises a rigid sliding part guided on the inner part and a rigid fastening part connected in a fixed manner to the outer part. The two rigid parts are connected to one another by means of an elastomeric or rubber thrust washer. Preferably, there is a throttle in at least one of the rigid parts.

Abstract: A vibration isolator supports a vibrating body vibrating in a wide frequency range while isolating produced vibrations in the entire frequency range. The vibration isolator includes a first attachment member adapted to be connected to the vibrating body, a second attachment member adapted to be connected to the structural body, and an elastically deformable resilient member fixed to and interconnecting the first and second attachment members, the resilient member being elastically deformable in response to relative movement of the first attachment member with respect to the second attachment member. The vibration isolator has a first chamber defined at least partly by the resilient member and having a volume variable dependent on elastic deformation of the resilient member, and a second chamber communicating with the first chamber through a communication structure and having a volume variable dependent on variation of the volume of the first chamber, the first and second chambers being filled with a liquid.

Abstract: A fluid-filled resilient support structure including a first annular resilient member disposed radially outwardly of an inner sleeve, a pair of annular closure members closing opposite ends of an annular space between the inner sleeve and the first resilient member, a cylindrical member fitted on an intermediate portion of the inner sleeve, an orifice member spaced radially outwardly from the cylindrical member, a second annular resilient member between the orifice member and the cylindrical member, and an outer sleeve fitted on the outer surface of the orifice member. The orifice member has a radially outer portion sandwiched between upper and lower portions of the first resilient member in the axial direction. The orifice and cylindrical members and the second resilient member axially divide the annular space into two fluid chambers which are closed at the opposite axial ends of the first resilient member by the closure members. The orifice member has a circumferential groove formed in its outer surface.

Abstract: The mount preferably includes a decoupler assembly that causes different degrees of damping of relatively large magnitude excitation forces that result in mount compression versus mount extension, and that causes no or only minimal damping of excitation forces of relatively small amplitude. In a preferred embodiment the mount includes a generally cylindrical double-walled housing having a central portion containing at least part of a first variable volume chamber containing hydraulic fluid, and having an outer portion containing a second variable volume chamber containing gaseous fluid. The second chamber is of annular shape and encircles at least part of the first chamber. A rolling diaphragm defining a boundary of at least one of the chambers is formed of elastomeric material having a layer of reinforcing material preferably disposed at an offset location therein.

Abstract: An active vibration stabilizer and isolator for removing vibration between a fixed support and a payload. The vibration stabilizer and isolator adaptable for use with large and heavy payloads or closed cycle applications where a hard or uncompressible stabilizer and isolator is required to isolate vibrations or oscillations from the payload.

Abstract: The mount has variable volume fluid chambers interconnected by fluid passageways and containing electrorheological fluid. Valves are arranged in series with a plurality of the passageways. Each valve has a flow area greater than that of the passageway in series therewith. Energization of a valve generates an electrical field effective to so increase the apparent viscosity of the fluid within the valve as to prevent fluid flow through the passageway in series with it. Selective energization of the valves, by suitable controls associated therewith, varies the frequencies at which fluid inertia forces cause the mount to undergo abrupt changes in dynamic stiffness. The valves may be located upon opposite sides of a central mount section through which the chamber connecting passages extend. Electrode elements of the valves are preferably so shaped as to minimize fluid drag and electrical concentration.

Abstract: The present invention provides simple and effective mechanisms, apparatus and self contained fluid circuitry to hydraulically actuate the vehicle's seat in generally downward movement in response to general upward movement of the vehicle's terrain contacting apparatus in relation to the vehicle's main body mass. The present invention also includes a simple device to remotely adjust and control the response movement of a hydraulic seat actuator. Also included in the invention is a means of controlling the actions of one or more hydraulic double acting piston pumps.

Abstract: A vibration isolating apparatus wherein an inner tube and an outer tube are disposed coaxially or axially parallel with each other, and a pair of liquid chambers are formed in a vibration absorbing resilient member disposed between the inner and outer tubes. The liquid chambers are communicated with each other through a limiting passage. Each of the liquid chambers is divided by a partition having a flow passage, and one wall of each liquid chamber is defined by a flexible membrane which is capable of expanding and contracting the liquid chamber. Accordingly, low-frequency vibrations of relatively large amplitude are damped by virtue of the limiting passage. When high-frequency vibrations of relatively small amplitude occur, the flexible membranes are deformed in response to the rise and fall in internal pressure in the liquid chambers, causing liquid-column resonance to occur at each flow passage, and thus allowing the dynamic scale factor to be lowered.

Abstract: A membrane for a mount having hydraulic damping action has a peripheral bead and opposite surfaces extending inwardly therefrom. A nonrectilinear cut through the opposite surfaces of the membrane from at least proximate the bead of the membrane delimits at least one tongue from the membrane which projects either centrally of the membrane or toward a thinner portion of the membrane. The mount for the membrane has working and equalizing spaces filled with an hydraulic fluid and arranged to vary in volume in response to relative movement between pedestal and mounting bracket portions of the mount. A throttle opening between the working and equalizing spaces throttles fluid flow therebetween in response to the pressure differential therebetween from the volume variation for hydraulic damping.

Abstract: A fluid-filled elastic mounting structure includes an elastic member, hat-shaped outer and inner partition members superimposed on each other with their cup-shaped portions open on the same side and cooperating with the elastic member to define an operating chamber, and a flexible closure member cooperating with the outer and inner partition members to define an equilibrium chamber. The operating and equilibrium chambers are filled with a fluid and communicate with each other through an annular space which is defined by the cylindrical walls of the outer and inner partition members. The outer and inner partition members cooperate to define a flat space between their bottom walls.

Abstract: A two-chamber engine mount with hydraulic damping includes an engine side to be connected to an engine, fluid-filled chambers having rubber-elastic peripheral walls including a chamber disposed closer to the engine side, an intermediate plate disposed between the chambers having a conduit disposed therein through which the chambers are interconnected, an engine support plate at the engine side having a first membrane chamber formed therein, a first membrane closing off the first membrane chamber, the intermediate plate having a second central membrane chamber formed therein, and a second membrane closing off the second membrane chamber from the fluid-filled chamber to the engine side.

Abstract: The invention provides an elastically yieldable unit which can be manufactured in mass production and ensures a good filtering of vibrations both of high frequency and low amplitude and of low frequency and high amplitude. Such a unit comprises two chambers filled with liquid. These chambers are defined at least partly by elastically yieldable walls and are separated by a rigid partition wall and a movable wall carried by the partition wall. Further, the rigid partition wall defines a conduit of great length and small section which puts the two chambers in communication with each other.

Abstract: A hydraulic engine mount is provided, the dynamic characteristics of which may be varied in response to engine performance parameters. In particular, the invention provides for a hydraulic engine mount comprising a core for attachment to an engine and the base for mounting to a frame, the core and the base being connected to each other by an elastic member, at least two fluid filled and elastically deformable chambers divided by a diaphragm, a throttle for permitting a limited exchange of fluid between the chambers, an absorptive mass selectively movable by the core, and a selectively operable connection between the core and the absorptive mass.

Abstract: A fluid-filled resilient engine mount including an inner and an outer sleeve which have axes parallel to each other, and a resilient member which is interposed between the inner and outer sleeves and which cooperate with the outer sleeve to define a plurality of fluid chambers which communicate with each other through at least one orifice. The engine mount further includes a stopper block of an elastic material positioned in a radially outer portion of each fluid chamber, and fixed relative to the outer sleeve and the resilient member. The stopper block has an abutting portion which protrudes in the corresponding fluid chamber toward the inner sleeve. The abutting portion is spaced from a bottom of the corresponding void, and is abuttable on the bottom, thereby preventing an excessive amount of elastic deformation of the resilient member.

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 chamber 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: A fluid filled vibration isolator of the type having upper and lower chambers separated by a partition having an inertia track passageway and a decoupler assembly permitting fluid to bypass the inertia track passageway at certain amplitudes. The decoupler assembly includes a mass of particulate matter loosely contained within a screened cavity in the partition. The particulate matter has a predetermined density and interstitial volume and occupies less than the entire cavity when at rest therein. At low amplitudes of vibration, the particulate matter oscillates in a dispersed condition as the fluid oscillates through the screened cavity essentially bypassing the inertia track passageway between the chambers. As the amplitude of vibrations increases beyond a certain level, the particulate matter compacts alternately against the screens to throttle flow therethrough and thereby cause the fluid to oscillate in the inertia track passageway.

Abstract: A fluid-filled power unit mount device consists of a mount rubber securely interposed between two base plates. A partition plate is securely connected to one of the base plate so as to define fluid and auxiliary chambers on the opposite sides thereof. The partition plate is formed with an orifice to provide fluid communication between the fluid and auxiliary chambers, and provided with two parallely arranged movable mechanisms each having a movable member. The movable member is movable under small amplitude high frequency vibration causing booming noise, but restrained from its movement under large amplitude low frequency vibration, thereby effectively damping even vibration which is slightly higher in frequency than the booming noise generating high frequency vibration.

Abstract: A vibration damped apparatus comprising a damping mass which is mechanically coupled to a member subject to vibration. The damping mass is formed from a elastic material throughout which a plurality of sub-masses are distributed. The sub-masses are relatively positioned so that the damping mass has different moduli of elasticity in tension and compression, so as to quickly dampen a broad frequency range of vibrations in the vibrating member. In a preferred embodiment, the vibrating member is a tubular post upon which vibration-sensitive optical components are mounted, the damping mass being disposed within a cavity in the post to damp vibrations of the post and optical components thereon.

Abstract: A resilient mounting for engines, machine units, etc. During driving operation, resilient motor mounts having a supporting diaphragm-like element which oscillates freely via an air cushion generate undesirable and annoying noises, and they also transmit to the chassis and the body, in a practically undamped fashion, low-frequency oscillations. The present invention therefore provides an effective acoustic uncoupling, without adversely affecting the spring or shock absorption characteristic, via a damping device in the form of a flexible diaphragm which is provided with a throttled transfer hole. This diaphragm is attached between the air cushion and a supplemental space which receives compressed air, the pressure of which can be regulated.

Abstract: A pretensionable and hydraulically damped mounting element with an outer mounting sleeve, and an inner part which is held by an elastomeric body in the interior of the outer mounting sleeve, the elastomeric body above and below the inner part being formed with chambers serving as a mechanical spring and being filled with hydraulic fluid and connected to one another via a channel includes end caps located at respective end faces of the mounting element and being formed of elastic, deformable elastomeric material, the elastomeric body extending from the inner part substantially radially outwardly towards opposite sides of the outer mounting sleeve, the elastomeric body and at least one of the end caps defining the channel therebetween, the channel having a varying cross section.

Abstract: A resilient mounting, such as a rubber mounting, with hydraulic damping, in particular for mounting engines of motor vehicles, has two rigid end walls which are disposed opposite to each other in the axial direction, and at least two chambers which are disposed axially one behind the other and which contain damping fluid. The chambers are separated by a rigid partitioning wall. The chambers communicate with each other through a flow passage which extends in an annular configuration around the axis of the mounting, the flow passage being formed in the rigid partitioning wall. The rigid partitioning wall is arranged radially inwardly of, and supported by, an elastic, axially movable diaphragm which is fixedly and sealingly clamped at its outer periphery. At least one of the chambers is defined in part by a rubber-elastic spring member constituting part of the generally peripheral wall of the chamber.

Abstract: Hydraulic damping single-chamber mounting for motor vehicles with two rigid end walls axially disposed opposite one another, and at least two chambers containing damping fluid disposed axially behind one another. In a first of the two chambers, the damping fluid can be both compressed and decompressed. A rigid partition separates the two chambers. The partition is fixed and rigidly clamped on its outside circumference. The chambers are in communication with one another by means of a circular channel running around a central axis of the rigid partition. The rigid partition is located radially inside an elastic, axially-movable membrane. The membrane is fixed and rigidly clamped on its outside circumference. The rigid partition has at least one overpressure valve which operates for each direction of positive pressure between the chambers to prevent noises during cavitation in the decompression phase and pressure peaks in the compression phase within the first chamber.

Abstract: A suspension system consists of a suspension rod interposed between a vehicle body side member and a wheel side member to elastically connect them. The suspension rod includes a first elastomeric member connected to the vehicle body side member and defining a first fluid chamber. A second elastomeric member is provided in the suspension rod structure to be connected to the wheel side member, defining a second fluid chamber. The first and second fluid chambers are communicated with each other through a fluid communication passage. An incompressive fluid is filled in the first and second fluid chambers and in the fluid communication passage, thereby constituting a fluid dynamic damper for suppressing resonance vibration of the suspension system.

Abstract: A two-chamber engine mount with hydraulic damping includes a housing having rubber-elastic peripheral walls and an engine side to be connected to an engine, an intermediate plate dividing the housing into fluid-filled chambers being in communication with each other through a penetration formed in the intermediate plate, and an active vibration generator being integrated into one of the fluid-filled chambers closest to the engine side and being controllable in dependence on predetermined operating parameters.

Abstract: This invention relates to a method of and devices for impact and vibration damping and, more particularly, to devices composed of an elastoplastic material including the characteristics of damping, heat and pressure dimensional stability, and moisture non absorbency of a blend of polyolefin and conjugated diene butyl rubber which converts impact shock or vibration energy into thermal energy.

Abstract: A hydraulically damped mounting device has two anchor parts, in the form of a sleeve and a tube, connected together by a resilient wall. The resilient wall and the sleeve define a working chamber for hydraulic liquid which is connected to a compensation chamber by a passageway. The passageway may extend directly through the tube or peripherally of the sleeve. The compensation chamber is bounded by a bellows wall, permitting the volume of the compensation chamber to change freely as vibrations of the tube relative to the sleeve change the volume of the working chamber, without the bellows wall being subject to tensile stresses. The sleeve may be formed in two parts which are forced together during manurfacture, enabling a compact construction to be achieved.

Abstract: A vibration damping material having an improved mechanical strength and excellent vibration damping characteristic is disclosed.The material is made by usage of composition of 40 to 90 weight percent of iron oxide particles 0.1 to 100 .mu.m in size and 60 to 10 weight percent of resin.

Abstract: The disclosed mounting system is capable of fixing a base for mounting an optical component or other object anywhere on the surface of an optical table or other support having a two-dimensional pattern of mutually spaced fastener mounting holes. Such base includes two complementary base parts rotatable relative to each other. One of these base parts is provided with a radial or at least partially eccentric aperture for receiving a bolt or other fastener insertable into any one of the mounting holes. Such fastener is inserted through the base part aperture into one of the mounting holes, and the base may be shifted relative to that fastener to any one of a multitude of positions about that one mounting hole. If the above mentioned aperture is provided as herein preferred, the base may be positioned or fixed anywhere on the surface, even though the above mentioned mounting holes are mutually spaced from each other.

Abstract: A suspension device for a mobile self-lift drilling platform, comprising a water-tight chamber deformable under the effect of the load supported by the legs of the platform, this chamber being intended to be filled with a pressurized liquid. The deformability of the chamber is provided by its side wall which is formed by a tubular elastomeric element, with a substantially vertical axis, which element is secured to an inner and an outer tubular coaxial metal guide frames for translationally and rotationally guiding its axial, lateral and angular deformations under the effect of the load as well as of possible accidental shocks.