Abstract: The hydraulic damper according to the invention has at least one restricted communication passage (47) between its two working chambers (8, 9) whose cross section is controlled by a viscous restriction valve (51) positioned via a control pressure of a fluid of a control damper with at least one secondary chamber (41, 42) delimited in a secondary cylinder (39) by a control piston (40), which cylinder and control piston are integrally attached, one to the main body (1), the other to the damping piston (4) of the damper, such that the damping law of the control fluid positioning said valve (51) is linked to the relative displacements of the main body (1) and damping piston (4).Application to the equipping of elastic-return struts with integral damping, in particular for helicopter rotors and blades. FIG. 2.

Abstract: A viscous damper for absorbing vibrations of low amplitude over a wide frequency range. Two working volumes of resiliently deformable material, in the form of a bellows, are provided in a folded structure joined by a base carrying a restrictive annular fluid passage. Compressive forces applied to the primary volume are transmitted by a damping fluid through the restrictive annulus to the secondary volume, the resulting energy dissipation providing a damping effect. A hermetically sealed configuration provides multi-axis damping and isolation without wearing of frictional surfaces. Large damping values are attained with linear performance over a large dynamic range.

Abstract: A vibration damping device is comprised of first and second axially spaced end housings adapted to be mounted on spaced apart structures, and has a tapered intermediate member mounted on the second housing converging toward an open end of the first housing. A piston is mounted on an end of a rod which is connected to the first housing and extends through a bore formed in the intermediate member and forms a restricted flow orifice extending between the spaced apart housings. A pair of elastomeric sleeves extend between the intermediate portion and the piston and the first housing to form a pair of fluid chambers connected by the orifice. An elongated electrode preferably contacts an electrorheological fluid flowing between the chambers through the orifice.

Abstract: The hydraulic damper has at least one restricted communication passage (47) between its two working chambers (8, 9) whose cross section is controlled by a viscous restriction valve (51) positioned via a control pressure of a fluid of a control damper with at least one secondary chamber (41, 42) delimited in a secondary cylinder (39) by a control piston (40), which cylinder and control piston are integrally attached, one to the main body (1), the other to the damping piston (4) of the damper, such that the pressure law of the control fluid positioning said valve (51) is linked to the relative displacements of the main body (1) and damping piston (4).

Abstract: A damper has a cylindrical body having a flexible plate portion. The body is inserted into a cylindrical holder. The outer periphery of the body is secured to the holder with an adhesive so as to restrict deformation of the body caused by movement of a rod to be engaged with the flexible plate portion.

Abstract: A buffer cartridge for absorbing energy having a hydraulic component coupled with an energy-absorbing material component, the hydraulic component having a cylinder-piston arrangement, the cylinder being surrounded by a stack of pads made from resilient energy-absorbing material, each pad being separated by a spacer. The free end of the piston emerging from the cylinder is connected to an intercoupling member which can simultaneously apply a force to both the piston and the stack of pads. A stretchable accumulator seal surrounds a piston rod within the cylinder and provides a sealing sliding path for the piston rod to isolate the moving portion of the piston rod from hydraulic fluid. The piston rod terminates in a piston having a piston hub encapsulated in resilient material and provided with orificed passageways for flow of fluid to both sides of the piston.

Abstract: A hydraulically acting damping element includes a main chamber and a compensation chamber. Two rigid end walls and a rubber-elastic circumferential wall surround one of the chambers. An elastic, pressure-stable bellows has ends and a circumference. The bellows is disposed concentrically inside the one chamber and rigidly joined to the end walls with the main chamber inside the bellows and the compensation chamber between the bellows and the circumferential wall. An over-flow circuit is formed on one of the ends of the bellows and extends over at least part of the circumference of the bellows for hydraulically connecting the main chamber and the compensation chamber.

Abstract: In a damper for a steering device of a motor vehicle and more particularly a motor cycle a piston rod is axially movable with respect to the cylinder. The piston rod is provided with a piston inside the cylinder. The piston is provided with axial bores. The axial bores open into valve seat faces of the piston. Valve rings are allocated to the valve seat faces. Helical compression springs are located within the bores. These springs urge the valve rings towards respective opening positions. The valve rings are movable towards respective damping positions in response to the axial movement of the piston rod with respect to the cylinder. The valve rings have valve faces opposite to the respective valve seat faces. The valve faces are provided with projections towards the valve seat faces and with recesses adjacent these projections. So, a restricted fluid communication is obtained in the damping position of the respective valve ring.

Abstract: A bellows type shock absorber comprises a sealed bellows, a shock absorbing column which is provided with a chamber around it inside the bellows and which is along the axial line of the bellows and combined with the bellows so that it physically varies in conjunction with expansion and contraction of the bellows. Also, the bellows type shock absorber may have a through hole which communicates the internal chamber and the outside, and preferably the shock absorbing column is made of a kind of gelled material with a penetration value of approximately 50 to 200. This shock absorber is provided with the main bellows and a sub-bellows having a spring constant differing from that of the main bellows and a through hole which communicates the internal chamber of the main bellows and the internal chamber of the sub-bellows.

Abstract: The present invention provides a shock absorber unit for use on sailboards to absorb detrimental vertical forces generated during sailing in rough water. The unit replaces existing flexible solid rubber universal joints with a joint comprising a pressurized chamber with a flexible side wall. The flexibility of the side wall allows the present invention to absorb the impact forces while serving as an improved universal joint.

Abstract: In a gas spring apparatus according to the present invention, a cylinder assembly comprises a cylinder housing and a rod fitted therein for axial reciprocation. An oil chamber and a gas chamber are defined inside the cylinder assembly, and the capacity of the gas chamber changes as the cylinder housing and rod reciprocate relatively to each other. A damping force generating mechanism is provided in the cylinder assembly. A flexible bladder includes a body made of elastomer and a gas-barrier film. The film is formed on the surface of the elastomer body. The bladder divides the oil and gas chambers completely. Thus, when the rod reciprocates in the axial direction, relatively to the cylinder, the bladder inflates and deflates. The gas spring apparatus is used for a suspension system of an automobile.

Abstract: Adjustable vibration damper, in particular for motor vehicles, with a cylinder containing a damping fluid, an axially-movable piston rod inserted in the cylinder in a sealed manner, and a damping piston fastened to the piston rod, which piston divides the cylinder into two work chambers, whereby a damping valve with an axially-movable valve body and a valve seat controls the effective cross section of a damping passage. Control of such a vibration damper should guarantee a continuous adjustment capability, a high adjustment speed, a good temperature behavior and reliably reproducible damping force characteristics, as well as the use of a small amount of control energy.

Abstract: A new mass damper that avoids the formation of a higher-order resonance by utilizing the inertial resistance of a flowing liquid is disclosed. This damper solves the problem of an additional new degree of freedom due to the additional mass system associated with the conventional mass damper and makes it possible to control random vibration with a broad spectrum such as earthquakes. Also, several examples in which this damper is used for multilevel structures are disclosed.

Abstract: A liquid-filled suspension device having an inner cylinder, an outer cylinder, and an elastic member connecting these cylinders to each other. A connecting member is arranged on the cylinder, a closed liquid chamber formed inside at least one of the inner and outer cylinders, a restricted passage formed in the middle portion of the closed liquid chamber, and a flexible membrane member arranged in the closed liquid chamber. An electroviscous liquid is filled in the closed liquid chamber, and two electrode plates arranged in the restricted passage. In this suspension device is used a control device having sensors arranged on these cylinders, and arithmetic decision logic operated by signals from these sensors, and a high-voltage generating circuit operated by signal from the arithmetic decision logic.

Abstract: A double-acting hydraulic piston-and-cylinder unit adapted to constitute a damper for movements in a human joint prosthesis has a boot sealingly connected to the cylinder and the piston rod to receive the hydraulic fluid under pressure as the hydraulic fluid is displaced from one or the other of two cylinder chambers upon displacement of the piston rod. The boot has a conically widening region or segment sealingly secured to the rod and adjoining the cylindrical segment of the boot surrounding the cylinder in a transition segment formed as an outwardly convex bulge and designed to ensure that initial inward movement of the piston rod will give rise to a plate membrane deformation of the elastic boot while only further displacement will result in a rolling action of the membrane. This ensures a generally cylindrical uniform configuration of the boot in all positions of the rod as is essential for effective use in a prosthesis.

Abstract: A vibration insulating device to be installed between two members of a vibration system of an automotive vehicle. The device consists of an annular elastic member disposed between coaxial inner and outer cylindrical members and located coaxial with the outer cylindrical member. The elastic member is formed at its outer peripheral surface with a deep annular groove coaxial with the outer cylindrical member which groove is covered with the outer cylindrical member to define an annular hollow chamber. A generally cylindrical flexible diaphragm member is secured between the outer cylindrical member and the elastic member in such a manner that its central annular section divides the hollow chamber into a radially outward gas chamber and a radially inward liquid chamber, thereby effectively absorbing even high frequency small amplitude vibration transmitted to the device under deformation of the flexible diaphragm member.

Abstract: A hydraulic automatically ascending apparatus includes a hydraulic cylinder including a piston and a piston rod which extends from the piston to connect with an article, a volume-variable oil tank, an elastometric body for biasing the oil tank to retract, an oil pipe for intercommunicating with the hydraulic cylinder and the oil tank, and a stop valve mounted in the oil pipe for being manually closed to stop oil flow between the hydraulic cylinder and the oil tank. When the stop valve is opened and when the article is loaded, the article can be descended and thus positioned at a desired position. When the stop valve is opened and when the article is unloaded, the article can be ascended to an upper limit position. A throttle valve is preferably installed within the oil pipe for slowing the movement of the piston rod.

Abstract: A missile (10) and concepts for deploying the fins (14) thereof from a stored to a deployed position are disclosed. One device described has three main portions including: A first end portion (32) housing an initiator (22) that powers the device and a locking mechanism (26) that holds the fin at its stored and its locked position; a central portion (34) housing a driven piston (24) that rotates a positively connected fin (14) from the stored to the deployed position; and, a second end portion (36) housing a damping system that controls the rate of deployment of the fins.

Abstract: An air spring for motor vehicles to absorb road shocks includes first and second axially spaced end members with an intervening flexible sleeve forming a fluid pressure chamber therebetween. An improved two-way damping valve connects the pressure chamber to a fluid reservoir and provides damping for the air spring by restricting fluid flow in one direction, either into or out of the pressure chamber, without materially effecting the fluid flow in the opposite direction. The valve includes a flexible diaphragm formed of reinforced rubber having slots which provide one or more flaps. The diaphragm preferably is mounted on a rigid annular washer having a predetermined size center opening forming a damping orifice. The flaps are drawn automatically into the washer opening to restrict the fluid flow through the orifice when the fluid moves in one direction, with the flaps moving away from the orifice to permit free movement of the fluid therethrough when the fluid is moving in an opposite direction.

Abstract: A vibration damping and isolation apparatus wherein in damping is obtained by purely viscous fluid shear forces. The fluid is sealed in two chambers divided by a orifice to permit fluid flow. Chamber containment of the fluid and chamber volume change is provided by metal bellows which are arranged to provide a constant overall volume. Coulomb forces are avoided by the elimination of rubbing surfaces.

Abstract: A dual-chamber support bed or motor vehicle engine mount with hydraulic cushioning includes a resilient housing part and a support base for use in defining a working chamber and compensating chamber filled with liquid, the housing walls are annular rubber diaphragms with a buckling characteristic that is adjustable to adapt to the operating load. The chambers are connected to one another through a nozzle channel. Means for controlling the buckling characteristics (buckling rigidity) are provided in a wall of the working chamber and in a preferred embodiment include an additional buckling spring that is clamped into the fixed base housing and is adjustable in its buckling behavior from the exterior by a spindle.

Abstract: A tensioner for a power transmission belt that is adapted to be operated in an endless path and a method of making the same are provided, the tensioner comprising a piston and cylinder unit having a cylinder member and a piston member disposed in the cylinder member, the cylinder member having a tapering chamber defining a substantially straight line tapering internal peripheral side wall of the cylinder member that extends substantially from one end thereof and to the other end thereof and carrying a rolling diaphragm for rolling against the tapering side wall throughout substantially the entire normal tensioning range of movement of the belt engaging unit of the tensioner relative to the support unit of the tensioner whereby the relative movement between the members changes the effective area of the rolling diaphragm and, thus, the tensioning force on the belt engaging unit in a substantially linear manner throughout the normal tensioning range of movement of the belt engaging unit relative to the support u

Abstract: A rolling bellows for pneumatic cushioning or shock absorption of a vehicle. Such rolling bellows are stressed particularly severely during telescoping in the pressureless state during assembly and also under emergency condititions. In order to avoid the occurrence of tension cracks from such causes, the rolling bellows are provided in the region of the cylindrical curvature, and on the inner surface, with integrally formed-on raised surface portions.

Abstract: The invention relates to a hydropneumatic spring suspension or shock absorber device, in particular for heavy motor vehicles, which a spring element comprising a housing for a spring bellows filled with a hydraulic medium which is in flow connection with a chamber filled with hydraulic fluid and in which a pneumatic spring is disposed which is deformable under hydraulic pressure, one end of the bellows being supported in the housing and medium being admitted at the other end via an abutment connected with one of the parts. In accordance with the invention, a compact low wear-and-tear spring suspension device is obtained in that the bellows is bent into a substantially circular arc shape and the abutment is movable along the circular arc.

Abstract: This invention relates to multiple mounting vibration-preventing device wherein a partition wall is interposed between an upper plate and a lower plate. An upper vibration-preventing rubber member is interposed between the partition wall and the upper plate so as to define an upper damper liquid chamber therebetween. A lower vibration-preventing rubber member is interposed between the partition wall and the lower plate so as to define a lower damper liquid chamber therebetween. The upper damper liquid chamber communicates with the lower damper liquid chamber through an orifice. An upper elastic film, disposed inside the upper vibration-preventing rubber member, has a portion spliced to the partition wall and its outer end part caulked to the upper plate. The upper damper liquid chamber is defined by the upper vibration-preventing rubber member and the upper elastic film.

Abstract: An oleoelastic energy accumulator includes a rigid casing, at least one membrane of a polymeric material having a high deformability, and a liquid. The membrane has a curvilinear form, e.g., convex, toward the inside of the casing to the borders of which the membrane is tightly sealed for delimiting or defining a closed space occupied by the liquid. In correspondence with the pressure variations in the liquid, the membrane acts like a piston and passes from an at-rest, curvilinear configuration, to a final substantially flat configuration as a result of gradual and successive compression of the membrane which, in this manner, accumulates energy.

Abstract: A hydraulic mount having one variable size orifice member that connects a first chamber to a second chamber with an orifice that decreases in size with increasing pressure differential between the chambers above a prescribed pressure range when the pressure in the first chamber is greater, and another variable size orifice member that connects the second chamber to the first chamber with an orifice that decreases in size with increasing pressure differential between the chambers above the prescribed pressure range when the pressure in the second chamber is greater.

Abstract: Apparatus for controlling rotary motion wherein a bellows is fixed at one end to a support having a restricted vent opening and carries a crank at its opposite end linked to a stallable type motor, the motor moving the crank in a circular path controlled by the bellows between alternate fast and slow motion according to the change in length of the bellows.

Abstract: The invention relates to a process and device for regulating at any instant the speed of a mobile member, such as a pulley, moving in a stroke of determined uniform direction, by employing a fluid passing under pressure through an orifice of restricted section. According to the invention, said pressurized fluid is made to pass several times alternately in one direction and in the other through said orifice, during said stroke of determined uniform direction. The invention is more particularly applicable to the deployment of appendices mounted on board space vessels.

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 hydraulic shock absorber for vehicles including inner and outer cylinders, and a casing defining an oil chamber therein. The oil chamber is arranged to be in communication with the interior of the inner cylinder. A gas chamber hermetically defined by an elastic metal membrane and having a predetermined volume of gases confined therein is disposed in the oil chamber. The arrangement provides desirable damping characteristics in a substantially low damping force range as well as in an inherent or preset damping force range.

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: A linear motion damper is disclosed which comprises a hollow sleeve member, a rod reciprocating within the sleeve member, and a piston adapted to engage a fluid filled cylinder to provide resistance to linear motion by the exertion of lateral fluid pressure between the rod and the sleeve. The damper of the present invention exhibits greater efficiency and durability in operation, and is adaptable for a wide variety of applications.

Abstract: A suspension unit operatively connected between sprung and unsprung portions of a vehicle includes a replacement air sleeve and special air sleeve fitting facilitating installation. The air sleeve fitting is installed over the reservoir tube of the suspension unit and cooperates with a dust tube to locate the air sleeve on the suspension unit.

Abstract: A rate controller for use in outer space is provided where motion damping occurs by forcing damping fluid from one side of an actuator piston to the other side of the piston through an external line. The damping fluid is totally contained in a sealed system of metallic bellows with no seals required between moving parts and the external environment.

Abstract: An arrangement wherein a valve or valves, which are either manually or automatically controlled, control the amount of hydraulic fluid discharged from a belt driven pulsation pump and forced into and out of a variable volume chamber arrangement which is connected in series with an elastomeric insulating member, whereby the desired vibration offsetting pressure pulsations may be produced in said chamber.

Abstract: A suspension unit operatively connected between sprung and unsprung portions of a vehicle includes a replacement air sleeve and special air sleeve fitting facilitating installation. The air sleeve fitting is installed over the reservoir tube of the suspension unit and cooperates with a dust tube to locate the air sleeve on the suspension unit.

Abstract: When detecting means detects that changes have been achieved by an automatic transmission in lever position and/or gear position, a solenoid drive circuit is actuated for a predetermined period of time to drive shock absorbers which control the rolling of the engine of an automobile. More specifically, when it is actuated, the solenoid drive circuit energizes solenoids, whereby the rotary valves of the shock absorbers are rotated for said period. As a result, one of the two orifices of either shock absorber is closed, thus increasing the force damping the vibrations of the engine. Hence, the vibrations caused by a large torque of the engine are not transmitted to the chassis of the automobile.

Abstract: A one wheel trailer for a two-wheeled vehicle such as a motorcycle, or the like, is disclosed. The trailer includes a first and a second arm, each arm having a first and a second end. The first end of each arm is connected preferably to the site corresponding to a passenger footpeg of the two wheeled vehicle or the like. A rigid frame is secured adjacent the second end of each arm. A container is secured to the bulkhead and a spring biased suspension arm is pivotally connected to the bulkhead. A castor arm is mounted adjacent the distal end of the suspension arm enabling swivelling of the castor arm relative to the suspension arm. A wheel is rotatably mounted relative to the castor arm permitting the wheel to support the container.

Abstract: A pulley construction and method of making the same are provided, the pulley construction having a pair of opposed flanges respectively provided with surfaces for engagement with a V-belt construction when the V-belt construction is disposed therebetween. The pulley construction has structure for moving one of the flanges axially relative to the other of the flanges either in a direction toward the other flange or in a direction away from the other flange and has a fluid dampening unit separate from the structure for moving and being operatively associated with the one flange to dampen the axial movement of that one flange in either of the directions relative to the other flange with a restrictive force, the dampening unit comprising a flexible bladder having one part thereof operatively interconnected to that one flange.

Abstract: Apparatus for controlling opening and closing movement of a door including manual actuation for opening the door and then biasing the door toward its closed position. A device for slowing and impeding movement of the door in the closing direction includes a flexible sealed container with a high viscosity fluid arranged to reciprocate in one direction responsive to opening the door and in the opposite direction to closing the door. A channel has a first section and a second section with the side walls and a sloping bottom wall between the sections providing a roller guide. A roller in contact with the sealed container is freely movable and has rotary and reciprocating motion within the roller guide of the stationary channel upon engagement with the flexible sealed container.

Abstract: The invention relates to damped elastic supports, comprising essentially, between two bases fixable to assemblies to be supported on one another, on the one hand a flexible wall defining one chamber designed to cooperate with another chamber and, on the other hand, at least one fluid-flow restricting orifice. This assembly is also completed outwardly by two elastic domes of elastomer combined with one mass. The assembly of this mass with another mass and with the damper device and the elastic membranes is calculated so as to permit a certain flexibility to be maintained, both for low frequencies and high frequencies. The invention is particularly applicable to automobile engine supports.

Abstract: The present invention relates to a device for mounting a carried element on a carrying element in an automotive vehicle or the like. The device comprises a resiliently deformable support secured to two frame members so as to define a fluid-tight chamber, the chamber containing a fluid and being divided into two portions by a separating partition formed of a resilient annular portion affixed to one frame member and which carries a block member having at least one orifice through which the fluid is adapted to pass from one chamber portion to the other. The block member has a certain inertial mass such that the resilient portion will oscillate substantially following the displacement of the carried element when the latter vibrates at a frequency less than a particular frequency but will oscillate independently of the displacement of the carried element when the latter vibrates at a frequency greater than the particular frequency.

Abstract: A vehicle body suspension system comprising a piston-cylinder assembly provided between a vehicle wheel and a vehicle body. The piston, which is disposed within the cylinder connected to the wheel, and the piston rod coupled to the piston, are each formed with an oil channel extending axially therethrough. The end of the piston rod which is remote from the piston is connected to the vehicle body by means of an annular elastic member arranged around such end of the piston rod. An oil chamber having a variable volume is provided, and has part of its peripheral wall formed by part of the elastic member. A first damper arrangement is provided between the oil chamber and the oil channel for action during contraction of the system, and a second damper arrangement is provided in the piston for action during elongation of the system. An auxiliary vehicle body suspension spring is provided between the cylinder and the piston rod.

Abstract: A gas spring comprises a piston assembly slidable in a cylinder closed at one end and open at the other with a rod connected to the piston assembly and projecting through the open end of the cylinder. This open end is sealed by a sealing assembly and the interior of the cylinder contains a body of oil and a gas under pressure. The sealing assembly includes a shell of resilient material with one annular portion in sealing engagement with the rod, a second annular portion in sealing engagement with the inner wall of the cylinder, and a cavity containing a reservoir of oil. When the pressure in the cavity is less than the pressure in the cylinder, the inner portion of the shell collapses and, when the pressure differential is reversed, the inner end of the shell opens to permit oil to flow from the cavity to the cylinder. In either case, however, the action of the shell is such as to maintain the sealing action of each annular portion of the shell.

Abstract: A small-sized differential piston unit is disclosed. The piston unit has a cylinder filled with liquid medium and a piston slideably mounted in the cylinder. An operation rod is operatively connected to said piston. An improved sealing member consisting of a membrane is used to completely seal the liquid medium in the cylinder. Control means is provided for imparting fluid resistance caused by the liquid medium to the piston differently between its forward movement and backward movement in the cylinder.

Abstract: In a shock absorber device, a piston rod unit is axially displaceable through a cylindrical member from one end toward the other end thereof. The cylindrical member forms a variable volume working chamber containing a first fluid. A spring chamber is in communication with the working chamber so that the first fluid can flow between the two chambers. A pressurized second fluid is contained within the spring chamber separate from the first fluid and it acts on the first fluid for biasing the piston rod unit out of the working chamber. When the piston rod unit is moved into the working chamber and approaches an inner end position, it forms at least in part a damping chamber which decelerates the movement of the piston rod unit.

Abstract: An adjustment mechanism for a pneumatic timing device, that operates relay contacts with a time delay, in which a needle valve is aligned longitudinally with a bellows and the needle valve is operated by a rotatable adjustment knob that operates a visual indicator through a reduction gearing.

Abstract: Hydraulic shock absorbing arrangement for pipe conduit systems including a piston slidably mounted in a liquid-filled cylinder to define spaced chambers. The piston has a rod connected thereto which is slidable in a guide positioned at one end of the cylinder. The piston rod is surrounded by a sealing bellows which is secured in a liquid-tight manner at one end to the piston and at its other end to the guide. The cylinder is mounted on a stationary bearing, while the piston rod is connected to a pipe in which shocks are to be damped. A throttling valve communicates with each cylinder chamber, the latter chambers communicating with each other through an overflow path. An expandable compensation bellows communicates with the atmosphere through an air outlet opening, but is otherwise closed.

Abstract: A hydropneumatic assembly particularly for use as a pressure reservoir in a shock absorber includes a housing with a diaphragm operatively mounted within the housing to define therein a liquid chamber on one side of the diaphragm and a gas chamber on the opposite side thereof. The liquid chamber is defined between an inner wall of the housing and the diaphragm and the diaphragm is arranged to be pressed against the inner wall under the influence of gas pressure within the gas chamber. Damping liquid for a shock absorber flows into and out of the liquid chamber to an opening provided in the inner wall of the housing and, by a special feature of the assembly, ducts are defined between the inner wall of the housing and the diaphragm, with the ducts being directed to extend toward the opening through which liquid flows into and out of the liquid chamber.