Abstract: The invention relates to a heavy-duty trailer (10) in which at least one of the wheels (12) has a MacPherson independent wheel suspension (16). The wheel (12) can be a steered wheel, wherein the steering cylinders (94) of the steering device (40) enclose an angle (a) with the longitudinal direction (L) of the trailer. The transverse control arms (30l, 30r) can also be articulated onto the trailer frame at least in the longitudinal center plane (E) of the trailer (10).

Abstract: Damper is provided with damper main body including cylinder, piston being slidably inserted into cylinder to partition interior of cylinder into extension and compression chambers, and piston rod being inserted into cylinder to be coupled to piston, and damping force adjustment mechanism including flow path permitting passage of fluid only during either extension or contraction, valve seat being provided at intermediate position of flow path, valve body being movable back and forth relative to valve seat, and motor driving and moving valve body back and forth relative to valve seat to adjust flow path area of flow path. Damper energizes motor to move valve body distance, which is two-fold or more of distance from separated position where valve body is separated from valve seat to seated position where valve body is seated on valve seat, when flow path is blocked by moving valve body from separated position to seated position.

Abstract: In a pneumatic deceleration device comprising a cylinder with a piston movably guided therein by a piston rod and having at least one sealing element, with a displacement space and a compensation chamber disposed at opposite sides of the sealed piston, where a piston movement opposing force is generated by a pressure in the displacement space and a vacuum generated in the compensation chamber, a pneumatic connection is formed from the displacement space and the compensation chamber to the ambient when the piston is in its end position where the displacement space is at its maximum value.

Abstract: A two-wheeled motor vehicle has a rear cushion unit that includes a damper cylinder having one end part linked to a swing arm, a sub-tank connected to the damper cylinder and an adjustment mechanism for adjusting a damping force in response to operation of the operation element is provided between a vehicle body frame and the swing arm. A cylinder body of the damper cylinder, a bottomed housing tube part housing the adjustment mechanism having on an upper end part an operation face on which the operation element is disposed, and the sub-tank are integrally and connectedly provided. The operation face is inclined obliquely upward so that the operation element that faces a region bounded by the seat frame, the pillion step holder mounted on the seat frame and the swing arm when viewed from the side can be operated from obliquely above on the outside.

Abstract: A shock absorber includes a gas spring cylinder containing a piston moveable between an extended position and a compressed position within the gas spring cylinder. A mechanical actuator is arranged whereby a bleed port is automatically closed when the gas spring is compressed to a predetermined position corresponding to a desired sag setting. In one embodiment, the position corresponds to a predetermined sag setting whereby the gas spring is partially compressed. In another embodiment, a proper sag setting is determined through the use of a processor and sensor that in one instance measure a position of shock absorber components to dictate a proper sag setting and in another instance calculate a pressure corresponding to a preferred sag setting.

Abstract: In a hydraulic shock absorber, a damping force generating device is provided between a piston side oil chamber and a rod side oil chamber of a cylinder, and in a compression stroke, a compression side flow path for circulating oil in the piston side oil chamber of the cylinder through an outside flow path of the cylinder toward the rod side oil chamber is provided in the damping force generating device, while in an extension stroke, an extension side flow path for circulating the oil in the rod side oil chamber of the cylinder through the outside flow path of the cylinder toward the piston side oil chamber is provided in the damping force generating device.

Abstract: A regenerative shock absorber that include a housing and a piston that moves at least partially through the housing when the shock is compressed or extended from a rest position. When the piston moves, hydraulic fluid is pressurized and drives a hydraulic motor. The hydraulic motor, in turn, drives an electric generator that produced electric energy. The electric energy may be provided to a vehicle, among other things. The regenerative shock absorber may also provide ride performance that comparable to or exceeds that of conventional shock absorbers.

Abstract: A method and apparatus for a shock absorber having a damping fluid compensation chamber with a gas charge. In one aspect, a partition separates a first chamber portion from a second chamber portion, wherein the first portion of the chamber is at a first initial gas pressure and the second portion of the chamber is at a second initial pressure. A valve separates the first and second chamber portions and opening the valve commingles the first and second chamber portions so that the combined chamber portions are at a third pressure. In another aspect, a piston disposed through a wall is in pressure communication with the gas charge and is biased inwardly toward a pressure of the charge, whereby an indicator is movable by the piston in response to the pressure.

Abstract: A bicycle assembly can include a front or rear suspension system with a shock absorber. A front suspension system can be a suspension fork. A rear suspension system can include a rear shock absorber. The shock can have a shock body and a pressurized main air chamber within the shock body to act as an air spring. The shock can also have a valve configured to receive a pump for adding air to the main air chamber. A secondary air chamber and a control member can be used to reduce the pressure within the main air chamber by venting the secondary air chamber to the atmosphere.

Abstract: A shock absorber comprises a damping cylinder pressurized by a system pressure and divided by a piston into a compression chamber and a return chamber. A resilient device is disposed in the return chamber. The resilient device comprises a pressurizing member or pressurizing medium disposed in an inner volume that is delimited from the return chamber. The resilient device acts upon the damping medium volume in the return chamber such that the pressure initially during a compression stroke does not fall below a predetermined minimum pressure. As long as the pressure in the return chamber is less than the pressure created by the resilient device, the device is able to absorb energy. When the pressure in the return chamber is greater than the pressure created by the resilient device, the device becomes inflexible. The resilient device compensates for pressure reduction in the return chamber that occurs under rapid damping movements and that can cause cavitation during a compression stroke.

Abstract: A vehicle suspension system that inhibits a pressure within a gas chamber from reducing below a threshold value. In one arrangement, the suspension system includes a shock absorber associated with a motorcycle. The shock absorber includes an upper gas chamber that is filled with air. An air pressure adjustment valve operates to supply air into the upper gas chamber from a supply of air outside of the shock absorber when the air pressure in the upper gas chamber becomes smaller than a lower threshold value.

Abstract: In a front fork which is capable of adjusting a spring force of a suspension spring housed in a fork main body by driving a jack mechanism housed in the fork main body to raise and lower an upper end position of the suspension spring, the jack mechanism defines a pressure chamber by means of a cap member that closes an upper end opening of a vehicle body side tube and a piston member. By supplying and discharging a pressure oil to and from the pressure chamber, the piston member ascends and descends, thereby raising and lowering the upper end position of the suspension spring.

Abstract: A cushion device includes a shock absorber and an accumulator. As a piston moves in a certain direction in a cylinder so that the shock absorber is compressed, oil in an oil chamber is discharged to the accumulator through an oil hose. The compression operation of the piston allows a slide member to slide and the capacity of an oil chamber is reduced. The oil in the oil chamber is discharged to a regulation unit through an oil hose. The regulation unit controls a valve by the pressure of the oil coming in from the oil chamber and applies resistance to the oil discharged from an oil chamber to an oil chamber.

Abstract: Yaw damper for damping yaw motions between two vehicle parts. This includes in the customary manner a piston part and a cylinder part, wherein that piston part is provided with a piston which divides that cylinder part into two chambers. Between these two chambers, connecting lines are present. The embodiment of these connecting lines determines the damping characteristic which governs the motion between the piston and the cylinder part. Especially for vehicle parts which move at higher speeds and/or high frequencies, such as train sets, it is desirable to provide a damper which is as stiff as possible. For this purpose, the present invention proposes the installation of pumping elements which, as far as possible, increase the pressure in the chambers which are formed by the piston in the cylinder part. Preferably, this construction is realized such that this pressure automatically decreases at lower speeds and/or low frequencies.

Abstract: A bicycle can include a suspension system with a shock absorber. The shock absorber can have a sag position which can be adjustable. Sag refers to the amount of movement experienced by the suspension under a static load, such as that of the weight of a rider. Methods and systems to set sag can include at least one valve in fluid communication with a gas chamber of the shock absorber. In some embodiments, the at least one valve can be used to automatically set the sag position based on an individual's weight and riding position.

Abstract: A shock absorber housing for a shock absorber of a vehicle comprises a tube, which has a tubular wall, and an attaching element joined onto the tubular wall, the attaching element determining a critical force introduction area of an introduction of a force into the tubular wall, the tube in a longitudinal direction being built up from a first tube section having a first tubular wall and at least a second tube section having a second tubular wall, the first tube section and the second tube section being joined together by their ends facing one another. The first tube section and the second tube section are joined together with a tubular wall overlap of the first and second tubular wall, which overlap extends in a longitudinal direction, the tubular wall overlap being situated in the critical force introduction area of the attaching element.

Abstract: Improved mount and bearing height adjustable air suspension shock absorber devices, apparatus, systems and methods, for use with sport utility vehicles(SUVs) such as Range Rovers®, and the like. Air lines run through an upper mount into an upper opening of an inflatable and deflatable airbag. The airlines have not external lines such as the nylon type tubing used in the prior art, and are not prone to failure which occurs more frequently with the external tubing air lines. Inflating and deflating the air springs/airbags (bladders) allows for the shock absorbers in the devices to be adjusted to different riding conditions over different types of terrains giving the rider a customized ride over different types of on road and off-road terrains. An internal air line machined into the head of the air suspension device provides a direct passageway for compressed air to pass into and out of the airbag without using external tubes.

Abstract: An air spring and shock absorber unit for bicycles or motorbikes includes operator control elements which are accessible from the outside and are disposed on an outer surface of the air spring and shock absorber unit. The operator control elements are disposed so as to be rotatable about a common axis and relative to a position of articulation points.

Abstract: A strut (12) is configured for an active suspension system (142) which provides electronic control for both the force applied by the strut (12) and the dampening characteristics of the strut (12). A compressible fluid (18) is used within the strut (12), and preferably includes a compressible base fluid and electromagnetic field responsive particles (132) which are suspended in the compressible base fluid. The electromagnetic field responsive particles (132) are preferably closely matched in density and modulas of elasticity to that of the compressible base fluid to prevent sedimentation of the particles (132) and to maintain the elasticity of the compressible fluid (18). The amount compressible fluid (18) within the strut (12) is electronically controlled to determine the force applied by the strut (12) and a field strength applied to the compressible fluid in a fluid flow passage is electronically controlled to determine the dampening characteristics of the strut (12).

Abstract: Yaw damper for damping yaw motions between two vehicle parts. This includes in the customary manner a piston part and a cylinder part, wherein that piston part is provided with a piston which divides that cylinder part into two chambers. Between these two chambers, connecting lines are present. The embodiment of these connecting lines determines the damping characteristic which governs the motion between the piston and the cylinder part. Especially for vehicle parts which move at higher speeds and/or high frequencies, such as train sets, it is desirable to provide a damper which is as stiff as possible. For this purpose, the present invention proposes the installation of pumping elements which, as far as possible, increase the pressure in the chambers which are formed by the piston in the cylinder part. Preferably, this construction is realized such that this pressure automatically decreases at lower speeds and/or low frequencies.

Abstract: A suspension system for motor vehicles with a level control for adjusting a predetermined height of the vehicle body is configured with at least one piston-cylinder unit which is provided with a work cylinder, a piston rod and a damping piston having damping valves, a pump of an oil reservoir, corresponding inlet lines and outlet lines from the oil reservoir, and corresponding inlet lines and outlet lines from the oil reservoir to the piston-cylinder unit, and vice versa, and the pump is configured with a pump piston and a drive unit. The piston-cylinder unit and the pump are constructed as separate subassemblies which are manufactured independently beforehand, and at least the piston-cylinder unit is filled with damping medium before the two subassemblies are mounted.

Abstract: Shock absorber components, such as a radial bypass damper, an anti-cavitation valve (ACV) and an incremental flow metering valve IFMV. The damper is of a continuous, unitary construction with a main hole and auxiliary holes interconnected by passageways. The ACV has openings that angle obliquely relative to entry surfaces of valving shims and extend at an incline continuously through the valving shims. The metering valve linearly regulates flow, substantially independent of piston displacement.

Abstract: A bicycle shock absorber and methods for differentiating between rider-induced forces and terrain-induced forces includes a first fluid chamber having fluid contained therein, a piston for compressing the fluid within the fluid chamber, a second fluid chamber coupled to the first fluid chamber by a fluid communication hose, and an inertial valve disposed within the second fluid chamber. The inertial valve opens in response to terrain-induced forces and provides communication of fluid compressed by the piston from the first fluid chamber to the second fluid chamber. The inertial valve does not open in response to rider-induced forces.

Abstract: A gas spring for providing a smooth and generally gradual load distribution between interrelated parts of a press has a casing defining at least in part a gas chamber. A housing is received at least in part in the casing. The housing has a through bore sized for receipt of the piston rod therein for reciprocation between extended and retracted positions. A piston retainer is attached for conjoint movement with the piston rod. An end of the housing flexes between a compressed position when the piston retainer abuts the housing as the piston rod moves toward its extended position and an uncompressed position when the piston retainer moves toward its retracted position and out of engagement with the housing.

Abstract: A spring element with a hydropneumatic strut are positioned between the bogie and the body of a rail car, with the strut having a sliding piston in a cylinder, whereby the piston or the cylinder can be connected with the bogie and the other component can be connected with the body, and the piston area of the cylinder is connected with a hydraulic accumulator. A strut that is easy to service and maintain and does not accumulate any appreciable amount of dirt is created by virtue of the fact that the hydropneumatic strut has a hydraulic height regulator valve or a height sensor connected or connectable with a feedback loop, whereby the position of the piston in the cylinder can be adjusted or determined.

Abstract: Vibration damper with a damping medium-filled cylinder, in which a piston rod is installed with freedom of axial movement, and a pressure container, which is connected to the vibration damper by an adapter piece. The adapter piece comprises a connecting part, which is connected to the pressure container, and an upper part, which is connected permanently to the vibration damper. A filling channel inside the adapter piece is open at both ends when the pressure container is full, and a filling channel on the vibration damper side, which is connected to the filling channel of the adapter piece, has a closing element.

Abstract: A ride control system for a motorcycle having an oil-containing fork having an air space. The control system includes a control unit having a reservoir and a valve in flow communication with the air space of the fork and the reservoir. The valve is configured to enable air to substantially freely pass from the air space of the fork to the reservoir during a relatively low speed impact experienced by the fork, and to inhibit air from passing from the fork to the reservoir during a relatively high speed impact.

Abstract: A damper for an airplane landing gear leg comprises a main strut (11) and a rod piston (13) co-operating with the strut (11) to define a main chamber (15) and annular chamber (16) for hydraulic fluid, and presenting internally two adjacent chambers (19, 20) that are isolated from each other by a separator piston (21). The damper (10) further comprises a first secondary strut (26) telescopically Slidable on the above-mentioned rod piston (13), and a second secondary strut (37) telescopically slidable on the other end of the first secondary strut (26). The two second annular chambers (31, 40) as defined in this way are respectively connected to associated control circuits thus enabling the total length of the damper to be shortened or lengthened respectively for the purpose of causing the landing gear to contract or to be extended.

Abstract: A gas damper includes a gas pressurized working chamber and valving within the piston to control flow of the gas through the piston. A system is in communication with the working chamber to control the gas pressure within the working chamber in order to control the damping characteristics of the damper. An electronic control unit is utilized to control the opening and closing of the valving within the piston to also control the damping characteristics of the damper.

Abstract: A suspension system for a motor vehicle body having a level regulating device for setting a predetermined height of the motor vehicle body includes an outer tube and at least one piston-cylinder assembly arranged in the outer tube and having a working cylinder, a piston rod and a damping piston having damping valves. The suspension system further includes an oil reservoir with inflow and outflow lines for conducting a flow of oil between the oil reservoir and the at least one piston-cylinder assembly. A pump including a pump piston and a drive is arranged for pumping oil through the inflow and outflow lines for setting the predetermined height of the motor vehicle body. To connect the pump, a base is sealingly arranged on the outer tube, wherein the pump is connectable to the base in at least two operative positions.

Abstract: A vehicle height adjusting device includes a cylinder (1), a rod (3) inserted in the cylinder (1), a piston (4) connected to the rod (3) and movable within the cylinder (1), and defining a rod side chamber (2a) and an non-rod side chamber (2b) in the cylinder (1), damping parts (4a, 4b) for generating a damping force by the movement of the rod (3), a high pressure chamber (18) and a low pressure chamber (16) charged with gas, a pump chamber (25) for adjusting the vehicle height by supplying the working fluid in the low pressure chamber (16) into the non-rod side chamber (2b), a communicating path (5a) for communicating the non-rod side chamber (2b) and the high pressure chamber (18), and a valve body (20) for increasing and reducing a channel area of the communicating path (5a) depending on the fluid pressure of the high pressure chamber (18).

Abstract: A gas valve assembly for a shock absorber includes a first portion of a first material and a second portion of second material which is less rigid than the first material. The first portion defines a rigid valve assembly body having a threaded portion to mount the valve to the shock body. The second portion is resilient and defines an integral plug and annular seal interconnected by a connecting member. The annular seal is molded adjacent a step engagement surface to seal the gas valve assembly to the shock body. A head having a tool engagement surface compresses the annular seal when the gas valve assembly is threaded in place.

Abstract: A compact temperature compensating gas spring including a gas filled hollow cylinder and a piston assembly slidably received in the gas filled hollow cylinder. The piston assembly includes a piston head and a piston rod. The piston rod includes a temperature compensation chamber. The piston head includes an aperture formed therein in communication with the temperature compensation chamber. A temperature activated valve is operably connected to the aperture to control gas flow between the cylinder and the temperature compensation chamber.

Abstract: Self-pumping hydropneumatic suspension strut with internal height control, in particular for motor vehicles with a work cylinder which is filled with oil and is under pressure by at least one gas cushion which is arranged in a high-pressure chamber and which acts as a spring, the work cylinder being divided into two work spaces by a work piston supported by a hollow piston rod, with a piston pump which is driven by the spring movements and conveys oil out of a low-pressure chamber into the work space connected to the high-pressure chamber and connects the work space connected to the high-pressure chamber to the low-pressure chamber by a regulating opening which is closable depending on the position of the work piston in the work cylinder, wherein a flow connection running through an intermediate wall and opening out below the surface of the oil is provided between the pump space and the low-pressure chamber, wherein the flow connection is arranged in the intermediate wall and has at least one bore hole in the

Abstract: A suspension unit used in a pull type shock application is disclosed, whereby a main shaft passes completely through a damping fluid so that the shock absorber fluid is not compressed when the shock shaft is displaced. The shaft also acts on a compression spring by an additional piston on the shaft. A cylindrical outer housing provides two distinct air chambers. The pressurization of these air chambers alters the spring rate, preload of the suspension, and vehicle ride height.

Abstract: The invention relates to a device for adjusting the pressure in the chambers of a hydraulic jack comprising a hollow valve seat extending substantially longitudinally between two end sections, the body of the valve seat being connected to a source of pressurised fluid, each of the end sections of the valve seat being linked to a chamber of the hydraulic jack and adapted to receive a valve allowing to control the refilling with hydraulic fluid of said chamber of the jack, characterised in that a valve return spring is placed inside said valve seat and in that each of the ends of said valve return spring is attached to one of said valves.

Abstract: A cylinder has an interior space which contains a medium under pressure. A piston is displaceably arranged in the cylinder and has a piston rod which projects from the cylinder at one end of the cylinder. The piston rod is enclosed by an annular seal having an inner radially encircling circumference which bears against the piston rod and an outer radially encircling circumference which bears against the inner wall of the cylinder, a side facing the interior space to which the pressure of the medium is applied, and a side remote from the interior space supported on a supporting element. The supporting element, in turn, is supported on part of the cylinder. The supporting element includes a safety element which is designed to shorten its axial length during thermal overloading, as a result of which a passage opens from the interior space of the cylinder to the environment. The safety element is made of a melting or subliming material.

Abstract: In a combined spring and shock absorber system for a wheel suspension of a vehicle comprising tubular rolling bellows arranged between a wheel-support structure and a vehicle body the bellows includes a space filled with a fluid in communication with a hydraulic accumulator. The bellows space is also in communication with at least one additional hydraulic accumulator via a throttle passage and via at least one pre-set differential pressure-control valve ensuring that threshold values for the internal pressure in the tubular rolling bellows are not exceeded in the event of high spring-extension and/or spring-compression speeds.

Abstract: A hydraulic shock absorber comprises a cylinder (11) with an expandable and contractible piston rod (12), an outer casing (13) disposed on the outside of the cylinder (11), and a reservoir (16) defined between the outer casing and the cylinder. Due to an elastically deformable bladder (14) disposed inside the reservoir, a gas chamber (17) in which gas is sealed is formed between the bladder and the outer casing, and a reservoir chamber (18) communicated with the inside of the cylinder and designed for guiding hydraulic fluid is formed between the bladder and the cylinder. Furthermore, a gas sealing valve (23) for opening and closing a flow conduit (24) communicated with the gas chamber provided to part of the outer casing is provided to a bottom portion (19) of the outer casing, and allowing gas to enter and exit the gas chamber via the gas sealing valve makes it possible to freely adjust the gas pressure in the hydraulic shock absorber from the outside.

Abstract: An reusable impact energy absorbing device utilized a liquid filled piston and cylinder assembly whereby upon application of an impact to the piston the piston will move along the length of the cylinder and discharge the liquid outwardly through a sequence of valves into an elastic balloon structure secured to the piston and cylinder assembly to capture the fluid. The valves may be two-way valves which will allow the return of the fluid from the elastic balloon to the cylinder due to the creation of a partial vacuum in the cylinder upon upward movement of the piston when the impact force is removed. Upon discharge of the fluid from the cylinder through each valve, the fluid is forced to travel through a restricted labyrinth to further dissipate the impact energy.

Abstract: Heat of an electrothermal part of a heater can be transmitted indirectly and efficiently to a pressure medium. A tubular case 6 having one end portion connected to a piston rod 2 airtightly and the other end portion slidably placed in contact with the outer circumference of a cylinder 1 is provided, a mounting hole 15 is formed within a holder 4 for closing an open end on the piston rod 2 connecting side of the case 6, and an electrothermal part 13a of a heater plug 13 is fitted into the mounting hole 15 directly or through a heat conductivity collar 16.

Abstract: Self-pumping hydropneumatic suspension strut with internal ride-height control, particularly for motor vehicles, with an outer tube with an oil-filled high-pressure work space under the pressure of at least one gas cushion acting as spring in a high-pressure chamber, a second work space on the piston rod side, and an axially displaceable piston which is supported by a hollow piston rod and is sealed in the work cylinder. The piston rod which is driven by the springing movement of the vehicle conveys oil from a low-pressure chamber to the second work space connected to the high-pressure chamber and a pump rod is received in a pump cylinder formed by the hollow piston rod.

Abstract: A gas filling apparatus for gas shock absorber comprises the assembly location correction unit, a gas filling unit, wherein the gas filling unit includes a rod chucking unit, a calking jig, an oil seal pushing unit, and a jig housing. A gas filling method for gas shock absorber comprises the steps of correcting the assembly location of the tube assembly and the rod guide, clamping the base shell assembly; lowering the gas filling unit primarily, lowering the rod chucking unit, lowering the collet housing device; letting the oil seal break away, filling the gas, lowering the gas filling unit secondarily and simultaneously calking primarily, and calking secondarily the base shell assembly. The apparatus and the method need not punch a hole for filling the gas at a circumference of the base shell assembly when filling the gas into a base shell assembly of the gas shock absorber.

Abstract: An actuation arrangement for movable components on vehicles, particularly for trunk lids or hoods, doors, vehicle tops and top covers, including at least one hydraulic cylinder (1) pivotably coupled to a cylindrical pivot pin (11) on the vehicle and/or on the movable vehicle component, and having at least one line (1) for the pressure medium in at least one working chamber (6, 9) of the hydraulic cylinder.

Abstract: A vibration damper, particularly a mono-tube vibration damper, has a cylinder in which a piston rod is arranged together with a piston so as to be axially movable, wherein the piston divides the cylinder into two work spaces filled with a work medium, the vibration damper having at least one deaerating device at the outer surroundings of the vibration damper for the areas filled with the work medium.

Abstract: Filling valve for a gas bag installed in a space bounded by rigid walls, where the forces of a liquid medium, which is under pressure and which flows into and out of this space, act on this space. The gas bag serves as a compensation space, is filled with gas, and can be filled through a filling valve, which has an access channel aligned with an opening in the rigid wall. The access channel is located in a connector part connected to the gas bag, the connector part also being connected to a guide part resting against the inside surface of the rigid wall, the access channel being in effective connection with the opening in the rigid wall via this guide part.

Abstract: A fluid mounting (20) for isolating or damping vibration between a vibrating member (21) and a structure (23). In one aspect, the fluid mounting (20) includes inner (22) and outer (24) members, a flexible element (26), first (28) and second (30) operating chambers, a fluid passageway (32) interconnecting operating chambers (28, 30), and a partitionless volume compensator (36) including a compensator chamber (38) separated into a gas-filled portion (40) and a fluid-filled portion (42). Notably, the chamber (38) is devoid of any separating barrier. At least one lock passage (44) interconnects the fluid-filled portion (42) with one of the first and second operating chambers (28, 30), and a working fluid (34). Preferably a bubble trap depression (46) focuses any gas bubbles into the lock passage (44). In another aspect, mounting (20) may include laminated shim construction with sloping profiles thereon to prevent bubble trapping.