Abstract: A suspension damper including a tube and a damping piston assembly disposed within the tube and slidably mounted therein for reciprocal movement in the tube. The suspension damper also includes a piston rod extending through the tube and connected to the damping piston assembly, a rod guide assembly closing a bottom end of the tube, and a rebound cut-off disk and spring suspended in the tube between the rod guide assembly and the damping piston assembly and cooperating with the damping piston assembly to provide a rebound cut-off effect between the rebound cut-off disk and the damping piston assembly. The rebound cut-off disk and spring have specific gravities that are greater than the specific gravity of the fluid in the tube, such that the disk and the spring sink in the fluid.

Abstract: A positionable support device includes a friction cylinder as a counterbalance in place of conventional gas springs. The support device includes a support arm pivotally secured between two endcaps to allow for vertical movement, the first endcap being mounted to a support structure such as a wall or desktop, the second endcap adapted to engage a mounting element for a device such as an electronic device. A friction cylinder is pivotally attached at one end to the first endcap, and at the other to an outward portion of the support arm. The friction cylinder includes a tubular member open at one end for receiving a friction bushing and a shaft. The friction bushing is secured to the tubular member and has a central passage which allows the shaft to slide through the friction bushing, extending and retracting in relation to the tubular member.

Abstract: A locking strut including a housing with a piston rod extending therethrough. A baffle mounts on the piston rod to divide the housing into two chambers. An orifice through the baffle allows fluid to pass between the chambers to damp reciprocating movement. An electromagnetic driver within the housing is selectively energized to move a ferromagnetic plate between an open position, wherein fluid flows freely between the chambers, and a closed position, wherein the ferromagnetic plate blocks the orifice to prevent fluid flow between the chambers and lock the locking strut in position. A plurality of orifices may be spaced about the baffle, with the number and size of the orifices determining the damping capability of the locking strut. A plurality of drivers may be disposed within the housing to overcome fluid forces during movement of the locking strut between an extended and a retracted position.

Abstract: A high frequency dampening apparatus for dampening the travel of a high frequency cycling driver. The present invention provides an enclosed housing having a fluid disposed therein. A piston rod is partially disposed within the housing and is engageable with a high frequency driver wherein the piston rod moves between a rearward position and a forward position relative to the housing. A plurality of fingers are circumferentially spaced and extend radially outward from the piston rod. A piston head retainer is connected to and extends radially outward from the piston rod and provides an orifice extending therethrough.

Abstract: A shock-absorbing piston for hydraulic fixtures, especially hydraulic dashpots for motor vehicles, and separating two hydraulics chambers. The body of the piston is breached by one or more ports. The end of each is blocked by a resilient or resiliently loaded cap. The object is to improve the flow of hydraulic fluid. The ports (13 & 14) are sickle-shaped and the cap rests eccentric against the face of the piston's body (16).

Abstract: The present technique provides a stabilizer system comprising a plurality of piston cylinder assemblies, which have multiple interconnected chambers to provide cross compensation between suspension members coupled to those piston cylinder assemblies. The piston cylinder assemblies may have two or more chambers separated by pistons, which move in response to a load imposed on the suspension member coupled to that piston cylinder assembly. As the piston moves in response to movement of the corresponding suspension member, a fluid pressure is transmitted to another suspension member to distribute the load between the two suspension members.

Abstract: The piston for a magneto-rheological fluid system is manufactured from a piston skirt of a material having a high magnetic permeability and a piston plate which closes one end of the piston skirt having a low magnetic permeability and therefore must be made out of a material such as stainless steel. The piston is manufactured by placing the plate on one electrode and clamping another set of electrodes against the outer circumferential surface of the piston ring or skirt. The plate and ring are brought into contact with one another while applying a current through the piston ring and the piston plate, thereby heating interfering portions of the ring and plate and permitting the plate to be forced inside of the ring while at the same time allowing the softened or plastic portions of the ring and plate to intermingle with one another and thus form a solid state bond.

Abstract: A damper includes a piston that carries a relatively compact control valve for controlling fluid flow through the piston. The control valve provides a variable amount of damping by regulating damper fluid flow between the extension chamber and the compression chamber of the damper during extension and compression strokes. Pressure regulation across the piston is controlled through a flow path as determined by the control valve. The damping force of the damper varies depending upon the loading conditions of the vehicle. The control valve is air pressure actuated to adjust the damping force and control the flow of fluid in the flow path. The piston and rod assembly include unique features such as a seal plate design, and spring retainer that aid in the efficient and reliable assembly in a commercial production setting.

Abstract: A vibration damper with a hydraulic-mechanical pressure stop includes a cylinder filled with damping medium; a piston rod movable in and out of the cylinder, a first piston fixed to the piston rod with freedom of axial movement, a second piston spaced from the first piston, a transfer spring in the second working space for moving the second piston toward the third working space in response to movement of the first piston toward the second working space; and a disk valve which allows damping medium to flow from the third working space through the second piston to the second working space as the second piston moves toward the third working space. The first piston divides the cylinder into a first and a second working space where the piston rod extends through the first working space. The second piston separates the second working space from a third working space.

Abstract: A fluid damper, in particular for moving furniture parts, includes a cylinder and a piston linearly displaceable within the cylinder. The piston has at least one opening for a damping fluid provided in the cylinder, and the fluid damper further includes at least one movable ring disk in the area of the opening(s). The at least one ring disk (8, 9, 10, 11) is arranged such that it at least partially covers the opening(s) (15) of the piston (3) during the damping stroke of the piston (3).

Abstract: In an item of furniture having a movable furniture part, such as a drawer, door or folding part, a damping apparatus damps movement of the movable furniture part. The damping apparatus is constructed as a negative-pressure damping apparatus or combined pressurized and negative-pressure damping apparatus. It has a piston (3) and a resiliently deformable piston part (6) in the piston rod (4). This resiliently deformable piston part (6) is pressed against the cylinder wall during the damping procedure.

Abstract: A piston is guided in an axially displaceable manner sealed off from a closed cylinder via an annular seal radially surrounding it, and divides the cylinder interior into a working space near the piston rod and a working space away from the piston rod. The two working spaces are filled with a hydraulic fluid. The piston has a one-sided piston rod which extends through the working space near the piston rod and is guided in a sealed manner to the outside through an end closing wall of the cylinder. A first valve can be opened under high pressure to connect the working space away from the piston rod to the working space near the piston rod. A second valve can be opened under high pressure to connect the working space near the piston rod to the working space away from the piston rod. A volume-equalizing chamber for receiving the amount displaced from the working space away from the piston rod, which is greater than the amount displaced from the working space near the piston rod.

Abstract: Damping valve for a shock absorber includes a damping valve body with at least one valve seat surface for a valve disk which is loaded in the lifting direction by a flow of damping medium. At least one support disk arranged on the valve disk determines, by its contour, a lever arm up to an effective surface to which pressure is applied by a damping medium in the lifting direction, and this support disk is pretensioned in direction of the valve disk by a tensioning plate, wherein the damping valve body forms a line of tensioning with the valve disk, support disk and tensioning plate, wherein at least one of the contact surfaces within the line of tensioning is profiled, so that there is a contact circle at the support disk, and the radius of the contact circle matches the provided reference dimension for the contour of the support disk determining the lever arm length.

Abstract: A shock absorber for a motor vehicle includes a compression valve having one or more deflectable discs mounted on the piston on the rebound chamber side. It also includes a rebound stroke valve having one or more deflectable discs mounted on the piston on the compression chamber side. The deflectable discs of the compression stroke valve have fluid flow apertures aligned with the rebound flow passage. The compression stroke valve also has an annular stop member and an annular orientation disc positioned between the stop member and the deflectable discs on the side of the deflectable discs remote from the piston. The stop member and the orientation disc have fluid flow apertures aligned with fluid flow apertures in the deflectable discs. An orientation disc has a pin folded therefrom and extending in a direction substantially parallel to the longitudinal axis, the pin extending through corresponding apertures formed in the deflectable discs into a corresponding slot formed in the piston.

Abstract: A buffering mechanism comprises a block member which is installed detachably in an actuator body, a piston which compresses air in a compressing chamber when a movable element abuts against the piston, and a check valve and a variable throttle valve which are provided in a passage for communication between the compressing chamber and the outside of the actuator body and which adjust a flow rate of the air discharged to the outside.

Abstract: A hydraulic dashpot with a cylinder (1) full of shock-absorbing fluid, with a piston (3) mounted on the end of piston rod (2), traveling back and forth inside the cylinder, separating the cylinder into two compartments (4 & 5), and provided with ports and shock-absorption valves, and with a variable bypass system accommodated in an axial bore (13) in the piston rod provided with lateral radial openings (11 & 26) extending through the rod. The object is to allow fixed independent establishment of the cross-section of the bypass system available for the fluid to flow through as the piston rod travels in the direction associated with the suction phase and of the cross-section of the bypass system available for the fluid to flow through as the piston rod travels in the direction associated with the compression phase.

Abstract: A motor vehicle shock absorber (12) that has an additional or further spring biased fluid control valve (96) that disposed between the blow-off valve (46) and the compression chamber (34) of the shock absorber (12) and that provides enhanced damping performance characteristics during relatively low velocity movements of the piston assembly (24) in the recoil stroke direction, that is, at velocities lower than those which cause the blow-off valve (46) of the shock absorber (12) to open. The further spring biased fluid control valve (96) affords the shock absorber (12) a firmness vis-a-vis roll stability to the vehicle steering yet provides the consumer a desired “boulevard” or soft cushioned ride.

Abstract: A shock absorber is provided that includes a shock absorber body defining a cavity that is at least partially filled with hydraulic fluid. A piston is slidably arranged within the body and separates the cavity into rebound and compression fluid chambers. A rod is secured to the piston and includes first and second portions that are respectively adjacent to the rebound and compression chambers. A fluid passageway extends between the first and second portions to fluidly connect the rebound and compression chambers. In this manner, fluid is permitted to flow through the rod to provide damping characteristics in addition to those damping characteristics typically provided by the piston. A valve assembly, which may include a one-way check valve, is arranged within the passageway for controlling the flow of fluid between the rebound and compression chambers through the passageway. Preferably, the rod includes a longitudinal bore having an adjustable plunger arranged therein.

Abstract: A vibration damper includes a cylinder in which a piston rod is guided so as to be axially movable. A first piston is mounted stationary on the piston rod and a second piston is mounted so as to be displaceable axially on the rod against a spring force. The cylinder has a work space at the piston rod side, a work space remote of the piston rod, and a work space between the two pistons. Through-openings which are outfitted with valves control a connection between the work spaces. The second piston has at least one return spring on both sides, and the piston is mounted so as to be displaceable axially in two directions against the return springs.

Abstract: An air damper comprises a cylinder having first and second openings at both ends, a piston that moves in the cylinder, a piston rod coupled to the piston and moving in and out at the first opening of the cylinder; and a cap positioned at the second opening of the cylinder. The piston rod has a continuous outer wall and an opening extending along the longitudinal axis of the rod. The cross-sectional view of the piston rod taken along a plane perpendicular to the longitudinal axis is an inverse U-shape, an inverse V-shape, a C-shape, or the like. The piston rod has a fixing ring at the leading end. A plane containing the opening is perpendicular to a plane defined by the fixing ring. The piston rod is fixed to a glove box so that the opening faces down.

Abstract: A hydraulic damper includes a friction member arranged inwardly with respect to a seal member and mounted to one of a cylinder and a piston rod. The friction member slidably contacts another of the cylinder and the piston rod to produce friction greater than that produced at the seal member.

Abstract: Damping-valve body, in particular for a piston-cylinder unit filled with damping fluid, having separate passages for two directions of flow, at least some of the passages having an outlet opening that is at least partially covered by at least one valve disk. Each passage has a rib that extends radially, relative to a first direction of flow of the damping fluid, from a boundary wall of the passage and bears a valve support surface for the at least one valve disk.

Abstract: A hydraulic dashpot with a cylinder (1) full of shock-absorbing fluid, with a piston (3) mounted on the end of piston rod (2), traveling back and forth inside the cylinder, separating the cylinder into two compartments (4 & 5), and provided with ports and shock-absorption valves, and with a variable bypass system accommodated in an axial bore (13) in the piston rod provided with lateral radial openings (11 & 26) extending through the rod. The object is to allow fixed independent establishment of the cross-section of the bypass system available for the fluid to flow through as the piston rod travels in the direction associated with the suction phase and of the cross-section of the bypass system available for the fluid to flow through as the piston rod travels in the direction associated with the compression phase.

Abstract: A shock absorber includes a shock rod having a longitudinal axis. A shock body is disposed around a portion of the shock rod, the shock body defining a fluid chamber therein and being slidable along the shock rod longitudinal axis. A piston is disposed on the shock rod in sealing engagement with the shock body, the piston having at least one channel therethrough in communication with the fluid chamber. The piston is moveable longitudinally in relation to the shock rod within a predetermined range.

Abstract: An improved magneto-rheological (“MR”) fluid damper includes a damper cylinder containing a volume of MR fluid. The cylinder includes an inner surface. A piston assembly is disposed in the cylinder and has an outer surface in slidable contact with the cylinder inner surface. The piston assembly includes a flow gap formed thereabout and an external coil surrounding a portion of the cylinder, the external coil capable of generating a magnetic field across at least a portion of the flow gap.

Abstract: A magneto-rheological damping device comprises a core element capable of acting as a magnetic circuit which carries a magnetic flux, and a case element surrounding a portion of the core element. A passage exists between the case element and core element, and an amount of magneto-rheological fluid is positioned between the core element and case element to flow within the passage. A magnetic flux generator is positioned adjacent a portion of the core element and is operable to generate a magnetic flux which acts upon the magneto-rheological fluid in the passage to affect the flow of fluid in the passage. The core element comprises a plurality of stacked laminations, which form a series of individual magnetic poles with gaps therebetween. The magnetic flux generator is operable to generate a magnetic flux in the poles and case element and across the gaps to affect the fluid flow in the passage.

Abstract: The present invention relates a speed reducing device of a gas spring device, and it is an object of the present invention to improve the structure of a piston which is an element of the speed reducing device, thereby to improve the shielding preciseness of a gas moving passage and to easily manufacture the piston. The piston according to the present invention is slidably moved in the cylinder in the state the piston is adhered to the inner wall surface 110a of the cylinder, and a cutting recess is formed on the outer peripheral surface of the cylinder to easily move the gas in first and second chambers. A concentric gas passage is formed on the surface of the piston which makes contact with the upper washer, and includes another concentric gas passage. An inlet and outlet of the gas passage is opened towards the outer peripheral surface of the piston. A concentric gas passage is formed on the surface of the piston which makes contact with the under washer.

Abstract: A magneto-rheological fluid device including a housing defining a cavity, a piston slidably disposed in the cavity to divide the cavity into first and second portions, a passage defined on an exterior surface of the piston fluidly coupling the first and second portions of the cavity, a magneto-rheological fluid disposed in the cavity such that motion of the piston is damped by flow of the magneto-rheological fluid through the passage and a magnet disposed to produce a magnetic field within the cavity substantially parallel to the motion of the piston at the exterior surface of the piston.

Abstract: The damper includes a damper housing and a piston assembly reciprocating therein. The damper housing includes an attachment device formed of an interior partially circular wall with a triangular cross section thereby forming an interior partially circular apex for engaging a cylindrical boss. This allows the damper to rotate about an axis of the interior partially circular wall and pivot about an axis perpendicular to the rotational axis. Additionally, the piston assembly includes a detent protrusion formed from a stem supporting a head, the radius of the head being greater than that of the stem. The detent protrusion is engaged by a keyhole-shaped aperture with a first portion with a radius of curvature substantially equal to that of the stem and a second portion with a radius of curvature substantially equal to that of the head. The detent protrusion can therefore rotate within the keyhole-shaped aperture.

Abstract: A dashpot piston in halves, the face of each resting against that of the other. The piston can be fastened to the end of a piston rod either directly or by way of a connector. Each half (1 & 2) is provided with a depression (7) along the circumference remote from the face of the other, creating a continuous groove (8) with a shorter diameter and accommodating a piston-assembly ring (9). Manufacture is facilitated by the inclusion of at least one resilient supporting ring (11) between the piston-assembly ring and the base of the groove.

Abstract: A hydraulic brake device includes a cylinder, a larger diameter piston movable within the cylinder in response to operation of a brake booster power piston, a smaller diameter piston engaged with and movable relative to the larger diameter piston in response to movement of a brake operation member, a floating piston engaged with the smaller diameter piston and movable relative thereto, a first pressure chamber defined by the larger diameter piston and the smaller diameter piston, a second pressure chamber defined by the cylinder and the floating piston and hydraulically connected to a wheel brake, and a relief chamber defined by the cylinder and the larger diameter piston. A switching device is disposed between the larger and smaller diameter pistons for normally interrupting fluid communication between the first pressure chamber and the relief chamber and for establishing fluid communication therebetween when the larger and smaller diameter pistons are relatively moved.

Abstract: The present invention provides a magneto-rheological controlled damping assembly that eliminates contact between the piston and the damping cylinder and that maintains a constant volume for the magneto-rheological fluid within the damping cylinder, therefore substantially reducing abrasion and wear to the damping apparatus components and increasing the performance and the life of the damping apparatus.

Abstract: An improved magnetorheological fluid damper is provided which more closely approximates ideal performance requirements including increased turn-up ratio and stiction free performance near zero velocity for realistic automotive applications. The MR damper includes a magnetic flux leakage reduction device positioned at each end of the magnetic damper piston assembly to create a magnetic flux isolation barrier causing magnetic flux to extend through an annular flow gap thereby minimizing flux leakage into other areas such as a piston rod and associated hollow tube. The magnetic flux leakage reduction devices are formed of a non-magnetic material and completely cover a respective adjacent axial face of a piston core. A laminar flow enhancing feature is also provided for enhancing laminar flow and minimizing turbulence in the annular flow gap thereby advantageously reducing the off-state force and increasing the turn-up ratio.

Abstract: A shock absorber includes a rebound valve assembly which performs the flexing disc function normally required for allowing the passage of fluid from one side of a piston assembly to the opposite side during the stroke of the shock absorber. The rebound valve assembly also incorporates a blow off function which increases the fluid flow through the piston when the fluid pressure being exerted upon the rebound valve assembly exceeds a specified level. The blow off feature protects both the shock absorber as well as the suspension system into which the shock absorber is assembled.

Abstract: A damper for a weighing device including a cavity 4 in which a plate 12 can move, which plate is designed for being connected to a weight measuring device 2. The cavity 4 is closed tightly by a flexible membrane 14 and is partly filled with an oil, while leaving a volume of air or of a gas between the top 14a of the oil and the membrane 14, the plate 12 being totally immersed in the oil. The lower surface of the plate 12 and the bottom of the cavity 4 have shapes which are not planar and which are not parallel to each other, thus preventing the formation of a thin film of oil between them. The peripheral surface of the plate 12 and of the peripheral wall of the cavity 4 define therebetween a first constriction 15 of which the transverse section is constant whatever the position of the plate 12 in the cavity 4.

Abstract: A flow restriction part (10) which provides a resistance to high speed oil is provided in a reservoir (R), and an air chamber (A2) which contracts according to an oil pressure is disposed underneath this flow restriction part (10). Providing such flow restriction part and air chamber in addition to an air chamber (A1), a repulsive force when the front fork contracts at high speed, such as during sudden braking, increases larger than during normal contraction while mechanical vibration caused by road unevenness during normal running is absorbed.

Abstract: A gas shock absorber has a pressure tube which defines a working chamber. A piston divides the working chamber into an upper working chamber and a lower working chamber. A series of extension passages extend through the piston and are opened and closed by an extension valve assembly. A first and a second series of compression passages extend through the piston and are opened and closed by a first and a second compression valve assembly, respectively. A rod guide assembly is located between the pressure tube and a piston rod. The rod guide assembly includes an oil chamber for sealing and lubricating the piston rod.

Abstract: A vibration damper includes a cylinder in which a piston rod is guided so as to be axially movable. A first piston is mounted stationary on the piston rod and a second piston is mounted so as to be displaceable axially on the rod against a spring force. The cylinder has a work space at the piston rod side, a work space remote of the piston rod, and a work space between the two pistons. Through-openings which are outfitted with valves control a connection between the work spaces. The second piston has at least one return spring on both sides, and the piston is mounted so as to be displaceable axially in two directions against the return springs.

Abstract: A shock absorber mounted electromagnetically operated real time damper valve which is mounted upon a piston rod and provides a flow path for fluid which bypasses the piston which separates a cylinder of the shock absorber into a pair of fluid containing chambers. The damper valve includes a spool reciprocally mounted within the hollow interior of a housing. A treatably secured cap is used to retain all of the component parts of the valve assembled without the need for other securing devices such as adhesives or brazing of parts together.

Abstract: A single absorber includes a valve assembly with a low speed valving system and a high speed valving system. Both systems control fluid flow through the respective valve assembly for fluid flow in the same direction. The low speed valving system is independently tunable in order to provide low speed damping to improve both vehicle control and handling. The independent tuning of the low speed valving system allows the optimization of the low speed valving system in relation to the high speed valving system as well as independent tuning of the high speed valving system in relation to the low speed valving system. The independent tuning of the two systems allow the achievement of a smooth transition between the two systems. The two valving systems can be incorporated into a piston assembly for an extension stroke, a base valve assembly for a compression stroke or both.

Abstract: The present invention relates to a hydropneumatic shock absorber. This new telescopic system comprises an outer sliding tube, an inner sliding tube and structure for adjusting the braking level of the shock absorber in expansion. Fastened on the base of the outer sliding tube is the bottom of a barrel on which rests an elastic structure, such as a counter-acting spring, which pushes on the inner sliding tube in the expansion stroke. The inner sliding tube carries at its internal end a bell which cooperates with a stop spring when in the expansion stroke. The liquid filled barrel contains an axially movable piston connected to the closure plug assembly with the piston contains a first valve, which opens only in the compression phase, and a second valve, which acts as variable throttle and is controlled by the padded end of a screw axially placed within the support tube. By acting on a screw, the expansion braking level of the shock absorber can be adjusted.

Abstract: An improved magnetorheological fluid damper is provided which effectively provides a smooth transition, without a sharp break in the damper force/velocity curve, between very low damping forces near zero damper velocity to higher damping forces at higher piston velocities while maintaining desirable maximum force levels. The damper includes a piston assembly, including a magnet assembly and a flow gap extending through the piston assembly to permit fluid flow between the chambers. The force/velocity optimization feature includes a groove or passage open to the flow gap, positioned in series with a part of the flow gap in a magnetic circuit generated by the magnet assembly and dimensioned/sized to permit fluid flowing the passage to experience a magnetorheological effect less than a magnetorheological effect experienced by fluid flowing through the flow gap but not through the groove. Preferably, the passage is formed in an inner annular surface of a flux ring positioned around a piston core.

Abstract: A piston valve assembly for regulating the flow of fluid through a mono-tube fluid vehicle damper is provided. The assembly includes a piston rod and a piston end having opposing first and second surfaces secured to the piston rod by a connector. A first outer annular seat is spaced radially from the piston rod and extends from the first surface. At least one first fluid passageway connects a first opening between the piston rod and the first outer annular seat and the second surface for providing fluid communication therebetween. A first blow-off valve has a hollow cylindrical portion with a first flange extending transversely from an end thereof with the first flange adjacent to the first outer annular seat when the first blow-off valve is in a closed position. The piston rod and connector secure the blow-off valve to the piston end. The first blow-off valve is movable to an open position away from the first surface.

Abstract: An improved magnetorheological fluid damper is provided which effectively provides a smooth transition, without a sharp break in the damper force/velocity curve, between very low damping forces near zero damper velocity to higher damping forces at higher piston velocities while maintaining desirable maximum force levels. The damper includes a piston assembly, including a magnet assembly and a flow gap extending through the piston assembly to permit fluid flow between the chambers. The force/velocity optimization feature includes a groove or passage open to the flow gap, positioned in series with a part of the flow gap in a magnetic circuit generated by the magnet assembly and dimnensioned/sized to permit fluid flowing through the passage to experience a magnetorheological effect less than a magnetorheological effect experienced by fluid flowing through the flow gap but not through the groove. Preferably, the passage is formed in an inner annular surface of a flux ring positioned around a piston core.

Abstract: A novel and improved magnetorheological fluid damper is provided which effectively secures a flux ring to a piston core in a manner which prevents relative axial and radial movement between the flux ring and the core throughout operation while minimizing the size of the piston assembly yet providing effective damping. Several connector devices are disclosed for both axially and radially securing the flux ring relative to the piston core at one end of the piston assembly in a simple manner without increasing the length of the piston assembly. The connector device may include an outer portion brazed to the flux ring, an inner portion connected to the piston core, bridge portions extending between the outer and inner portions, flow passages formed between the bridge portions and an inlet cavity formed adjacent an annular flow gap to permit unimpeded, enhanced laminar flow through the flow gap by improving the damping effect.

Abstract: A damper piston assembly includes a rod, a piston, a rivet disk, and a spring. The piston surrounds the rod between a riveted end and a longitudinal stop of the rod. The piston includes a valve assembly having a valve body with an orifice extending therethrough. The rivet disk surrounds the rod and has an opening for fluid communication with the orifice. The rivet disk is longitudinally secured between the piston and the riveted end of the rod. The spring is positioned in compression longitudinally between the rivet disk and the longitudinal stop of the rod.

Abstract: An automatically adjustable damping force shock absorber includes an outer cylinder; an inner cylinder provided in the outer cylinder; a piston inserted into the inner cylinder. The piston includes a plunger assembly slidably fitted in the inner cylinder so as to divide the inner cylinder into two compartments and provided with orifices on a side wall thereof, several one way valves on a upper and lower walls thereof and a cylindrical piston rod connected at one end thereof to the plunger assembly, a control valve provided in the plunger assembly for controlling fluid amount passing through the orifices and one way valves of the plunger assembly, and an electric power supplier connected to the control valve by a cable for supplying electric power.

Abstract: A piston for a piston/cylinder assembly is fastened to a piston rod and axially movably arranged in a working cylinder filled with damping medium. The piston having damping valves for the tension and compression movements of the piston in the cylinder and having a first and second group of passage ducts respectively for the tension and compression directions. The outlet sides of each of the first and second passage ducts open into a control edge covered by valve disks. The first and second passage ducts run axially parallel over at least part of their length, wherein the inlet and outlet regions of each of the first and second passage ducts being arranged axially one behind the other and one of the first and second groups of passage ducts emerges on the end face and the other of the first and second groups of passage ducts emerges radially outward on each side of the working piston.

Abstract: The present invention relates generally to front suspension fork assemblies for bicycles, and provides an improved suspension fork comprising an adjustable compression system for quick and easy adaptation to various types of terrain. The front suspension fork of the present invention comprises a pair of rigidly connected parallel fork legs, with each fork leg having at its bottom end a dropout for connection to the axle of a wheel. Each fork leg further comprises a shock absorber positioned therein and comprising a helical coil spring to urge expansion of the sliding tubes, flow dampers, and damping fluid within the cavities of the sliding tubes to dampen the movement of the sliding tubes in compression and expansion. Each flow damper comprises a flexible shim which opens in compression or expansion to increase the flow of damping fluid. Varying the flexibility of the shims also varies the damping effect of the shock absorber.

Abstract: The piston with a valve for a hydraulic damper tube, comprises a piston body (116) having a fluid passage (112) interacting with a floating valve element (115) for controlling in both directions the amount of fluid flowing through the passage. The floating valve element includes a spring washer (115), the deflection (f) of which in the free state is between approximately 0.1 times and approximately 2 times the thickness (e) of the washer.