Abstract: A suspension system for a vehicle is provided. A linear regenerative suspension system that converts mechanical energy into storable electrical energy is also provided. The system utilizes pistons, one on each side of the vehicle, engaged with a vehicle body at a distal end and having a fluid chamber at the proximal end. The system further has a central chamber having a rod freely laterally moving therein. A fluid communicates between the central chamber and each piston fluid chamber. Upon nonlinear forces applied to the vehicle, the rod is urged in one direction or another. This urging applies force to the fluid in the central chamber, and in turn, to the piston in the corresponding side of the vehicle, urging the piston up and in turn urging the vehicle body up.

Abstract: A sway bar system is described. The sway bar system includes a sway bar having a first end and a second end. The sway bar system further includes a first electronically controlled damper link which is coupled to the first end of the sway bar. The first electronically controlled damper link is configured to be coupled a first location of a vehicle. The sway bar system also has a second link which is coupled to the second end of the sway bar. The second link is configured to be coupled a second location of the vehicle.

Abstract: Solar tracker systems include a torque tube, a column supporting the torque tube, a solar panel connected to the torque tube, and a damper assembly. The damper assembly includes a first end pivotably connected to the torque tube and a second end pivotably connected to the column. The damper assembly further includes an outer shell, a piston within and moveable relative to the outer shell, a first chamber wall and a second chamber wall within the outer shell at least partially defining a chamber, and a valve within the chamber. The valve includes a first axial end defining a slot and is biased to a first position within the chamber in which the first axial end is spaced from the first chamber wall. The valve is moveable within the chamber from the first position to a second position to passively change a flow resistance of the damper assembly.

Abstract: A hydraulic damper assembly comprises a housing defining a fluid chamber. A piston is slidably disposed in the fluid chamber dividing the fluid chamber into a compression and a rebound chamber. A piston rod couples to the piston for movement between a compression and a rebound stroke. The piston has a compression surface and a rebound surface. The piston defines at least one compression channel, at least one rebound channel, and at least one additional channel. A compression valve covers the at least one compression channel. A rebound valve covers the at least one rebound channel. A proportional bleeding system located between the compression valve and the piston to establish a bleeding flow passage between the at least one rebound chamber and the at least one additional channel for reducing operation harshness of the hydraulic damper assembly. A piston for the hydraulic damper assembly is also disclosed herein.

Abstract: A mechanism and method for externally adjusting the mid-valve stiffness is described and enables adjustment of a mid-valve functionality without disassembly of a suspension system incorporating the invention. The effect of this adjustment on the damping curve is far greater than either low-speed compression adjusters or conventional high-speed compression adjusters. The apparatus combines the valve-stiffening system of a high speed compression adjuster with the sensitivity of the mid-valve. Externally accessible adjustment members are operatively coupled to the mid-valve components located internally in a fork so that manipulation of the adjustment members causes adjustment of the mid-valve and the damping force created by the mid-valve. The apparatus may be utilized in closed cartridge suspension forks (CCSF) and open cartridge suspension forks (OCSF) and other shocks or suspension dampers.

Abstract: A shock absorber with a hydrostopper is provided. The hydrostopper includes a stopper piston that is relatively displaceable along a rod portion of a piston and partitions one cylinder chamber into an upper chamber and a lower chamber, and a compression coil spring that biases the stopper piston against a stopper disc fixed to the rod portion in the lower chamber. The stopper piston has an orifice passage connecting the upper and lower chambers. The hydrostopper includes an elastic disk functioning as an elastically deformable member that increases an amount of elastic deformation to increase an amount of reduction of an effective passage cross-sectional area of the orifice passage as a differential pressure between pressures in the upper and lower chambers is larger when the pressure in the upper chamber is higher than the pressure in the lower chamber.

Abstract: A shock absorber has a rod that is retractably inserted in an axial direction inside the cylinder, a piston that is provided at a tip of the rod and partitions the inside of the cylinder into an extension-side chamber and a compression-side chamber, a rod guide that is provided at an open end of the cylinder and axially supports the rod, a subcylinder that is provided on the rod guide and forms an annular gap between itself and the cylinder, and a subpiston that is provided on an outer periphery of the rod closer to a base end thereof than the piston, that has an outer periphery in sliding contact with an inner periphery of the cylinder, and that is capable of leaving and entering the annular gap.

Abstract: A system for adjusting the damper force on the suspension system of a bicycle is provided. Sensors are placed on the front shock and rear shock to measure the amplitude of displacement or acceleration in the time domain and generate a zenith position, velocity, force, and work based on the measured values. The system calculates a curve fit approximation curve for the relationships of zenith position versus velocity and uses the approximation curves to generate and display recommended damper settings for the front shock and rear shock. Using the data ensures that the bicycle suspension data is balanced, such that the front shock and rear shock respond similarly to the same event.

Abstract: A damping valve arrangement of a vibration damper for a motor vehicle includes a damping valve body having a longitudinal axis A and a throughflow passage is covered by at least one valve disk, a spring arrangement has at least a first substantially disk-shaped spring element; and a force transmission disk arranged between the valve disk and the first spring element so as to be axially displaceable coaxial to the damping valve body. The force transmission disk has a first surface facing the first spring element and comprising a first contact ring with a first diameter, which first contact ring is axially elevated above the first surface, and a second surface opposite the first surface, which second surface faces the valve disk and comprises a second contact ring with a second diameter, which second contact ring is axially elevated above the second surface.

Abstract: A compression damper of a shock absorber includes: a single adjustable fluid circuit configured for controlling a damping rate associated with multiple compression speeds of the shock absorber, wherein the single adjustable fluid circuit includes a fluid passageway through a base valve; and a positionally adjustable floating shim stack positioned at one end of the fluid passageway, the positionally adjustable floating shim stack configured for selectively blocking a flow of fluid through the fluid passageway.

Abstract: A front fork of a bicycle may include a suspension system that includes a damper. The damper may include a hollow tube with orifices that may be partially blocked by an adjustable blocker. A free end of the adjuster that adjusts the blocker may maintain its axial position in any rotational position. Ambient air may be introduced through a valve and retained in the suspension system. The suspension may include a mechanical spring in a chamber away from the valve that introduces the ambient air.

Abstract: Generally described, dampers having shimmed pistons are configured for use with vehicle suspensions. The dampers generally include a shaft having a piston with compression and rebound valves extending therethrough. The piston interfaces a shim assembly at the valve outlets such that damping fluid flow is controlled through a set of valves in one direction, and the damping fluid flow is limited through the same set of valves in the opposite direction. In this regard, the shim assembly is configured to provide bleed relief of the hydraulic damping fluid at lower shaft speeds and deflect away from the piston higher shaft speeds. The shim assembly generally includes a ring shim that interfaces a shim stack to provide a configurable preload for the deflectable shims and a flow path for the hydraulic damping fluid during bleed relief.

Abstract: The present invention relates to a vibration damper (1) comprising a damper tube (2) which is at least partially filled with damping fluid and in which a piston rod (3) is movable back and forth, wherein a working piston (4) is movable jointly with the piston rod (3), by means of which working piston the interior space of the damper tube is divided into a piston-rod-side working space (5) and a piston-rod-remote working space (6), a damping module (7) for the frequency-dependent control of a comfort bypass which is formed between the piston-rod-side working space (5) and the piston-rod-remote working space (6) and which comprises a comfort path via which damping fluid can be caused to flow hydraulically in parallel with respect to the flow through the working piston (4), a control piston (8) which is received, such that it can perform stroke movements, in the damping module (7) and which, remote from the piston rod, delimits a pressure chamber (9) arranged in the damping module (7), wherein the pressure ch

Abstract: In a shock absorber, an extension-side check valve permitting a flow of hydraulic fluid directed from a common passage to a compression-side passage side, and a compression-side orifice establishing communication between the compression-side passage and a compression-side back-pressure chamber are provided in an extension-side discharge passage. A compression-side check valve permitting a flow of hydraulic fluid directed from the common passage to an extension-side passage side, and an extension-side orifice establishing communication between the extension-side passage and an extension-side back-pressure chamber are provided in a compression-side discharge passage. A pilot valve includes a valve body slidably inserted in the common passage, and a valve spring biasing the valve body in a valve-opening direction.

Abstract: A damper tube which is at least partially filled with damping fluid and in which a piston rod is movable back and forth, wherein a working piston is movable jointly with the piston rod, by means of which working piston the interior space of the damper tube is divided into a piston-rod-side working space and a piston-rod-remote working space. A damping module for the frequency-dependent control of a comfort bypass is formed between the piston-rod-side working space and the piston-rod-remote working space and which comprises a comfort path via which damping fluid can be caused to flow hydraulically in parallel with respect to the flow through the working piston.

Abstract: A damping valve includes a valve body has at least one through-flow channel for each flow direction of a damping medium through the valve body. Each through-flow channel connects an inlet to an outlet. a valve disk covers the through-flow channels at the outlet opening the valve disk has a first volume flow of the damping medium through the valve body, at least one pre-orifice in the valve disk and at least one pre-orifice throttle arrangement is arranged at least indirectly adjoining the valve disk and adapted to at least partially cover or open the pre-orifice depending on the flow direction of a damping medium. The pre-orifice throttle arrangement includes multiple structural component parts arranged coaxial to one another, at least two of the structural component parts are inseparably connected to one another.

Abstract: Shock absorber comprising a tubular base, a piston, a stem connected to the piston, and a plurality of fluid paths for connecting a working chamber and an accumulation chamber on opposite sides of the piston, one of which provides for a ring-shaped obstructing member arranged about the piston and able to slide along an axial length of the piston. The obstructing member comprises a bush of plastic material, which has a flexible lip portion extending from a rear end of the bush and having a radially outer surface tapered towards the rear end of the bush, the lip portion being adapted to seal against a radially inner surface of the base when the obstructing member is in a closed configuration. A support ring member is adapted to radially engage the lip portion of the bush from within, and to push it against the radially inner surface of the base.

Abstract: An apparatus and method are described where one or more pre-stressed spring elements are disposed between two structures to mitigate or cancel the effect of static loads applied to a component connecting the structures. The apparatus and methods may be used, for example, to reduce the adverse impact of static loads on the performance of top-mounts in a suspension system of a vehicle.

Abstract: A frequency-selective damper valve includes a controlled flow channel providing a fluid connection between a first and second valve sides; a controlled valve assembly in a controlled flow channel; a movable valve body acting on the controlled valve assembly; and a variable volume chamber, the movable valve body interacting with the variable volume chamber such that movement of the movable valve body and a change in volume of the variable volume chamber are interrelated. The variable volume chamber includes an outlet opening, in operation, downstream of the controlled valve assembly and does not include an opening upstream of the controlled valve assembly with respect to a controlled fluid flow in the controlled flow channel, the outlet opening providing a flow resistance.

Abstract: A shock absorber includes a cylinder and a piston dividing the cylinder in first and second cylinder chambers. The piston includes a first main channel and a first main non-return valve allowing a first main fluid flow from the second to the first chamber; and a second main channel and a second main non-return valve allowing a second main fluid flow from the first to the second chamber. The piston includes a connecting member; a first central member received into the connecting member such that the parts of the first main channel in the connecting member and the first central member are in line; and a second central member including another part of the second main channel and received into the connecting member such that the parts of the second main channel in the connecting member and the second central member are in line.

Abstract: A vehicle includes a support arm and a suspension element. The suspension element is rotatably connected to a support arm of a vehicle via a mounting pin that extends through an opening on the suspension element, a thrust washer, and a seal. The combination of elements prevent debris from migrating into the connection. The suspension element is configured to connect to a structural element of the vehicle via an upper mount. The suspension element may include a recoil damper having a piston with a plurality of grooves arranged to balance the forces on the piston during and after a recoil event or jounce.

Abstract: A compressible stop for use in a crane has a housing, a rod slidably mounted within the housing, a floating piston, and a valve assembly. The floating piston divides the housing into a gas portion biasing the floating piston towards an end of the housing and a liquid portion containing a hydraulic fluid. The valve assembly divides the liquid portion into a support portion and a reserve portion. The valve assembly includes a check valve allowing a liquid to flow from the reserve portion into the support portion, a pressure sensitive valve inhibiting the liquid from flowing from the support portion into the reserve portion unless the pressure is above a threshold pressure, and a frangible divider configured to rupture when the liquid pressure exceeds a rupture pressure.

Abstract: A damper includes a piston and a cylinder housing the piston, and generates a braking force based on a movement or relative movement of the piston. The piston includes a trunk portion and a seal ring surrounding the trunk portion. A first seal portion against an inner wall of the cylinder is formed on an outer peripheral portion in the seal ring, and a second seal portion against a circumference wall portion projecting from the trunk portion is formed in a front end portion positioned on a pressure chamber side. Also, a support rib portion is provided outside the trunk portion, which allows the seal ring to move within a predetermined range along a moving direction of the piston in a state wherein a movement gap for a fluid is formed between the trunk portion and an inner peripheral portion of the seal ring.

Abstract: A shock absorber including: a first passage (101) allowing working fluid to flow out from one chamber (19) as a result of movement of a piston (18); a second passage (181) provided in parallel with the first passage; a damping force generating mechanism (41) provided in the first passage, and configured to generate a damping force; a tubular case member (140) including at least a part of the second passage formed therein; an annular disc (134) supported on an inner peripheral side or an outer peripheral side in the case member. An annular seal member (156) configured to seal a gap to the case member is provided on a non-supported side of the annular disc. The shock absorber further includes two chambers (171, 172) in the case member, which are defined and provided by the disc. The disc is configured to block flow to the second passage.

Abstract: A minimum pressure shut-off valve closes off fuel flow responsive fuel pressure being below a predefined pressure. A sleeve includes at least a first flow window and a second flow window. The second window includes a notch providing a flow area based on an axial position of a spool moveable within the sleeve.

Abstract: An apparatus and method are described where one or more pre-stressed spring elements are disposed between two structures to mitigate or cancel the effect of static loads applied to an component connecting the structures. The apparatus and methods may be used, for example, to reduce the adverse impact of static loads on the performance of top-mounts in a suspension system of a vehicle.

Abstract: Generally described, aspects of the disclosed subject matter are directed to dampers having shimmed pistons. In accordance with aspects of the present disclosure, the dampers generally include a shaft having a piston with compression and rebound valves extending therethrough. The piston interfaces a shim assembly at the valve outlets such that damping fluid flow is controlled through a set of valves in one direction, and the damping fluid flow is limited through the same set of valves in the opposite direction. In this regard, the shim assembly is configured to deflect away from the piston as a result of damping fluid flow through the first valve. The shim assembly generally includes a ring shim that interfaces a shim stack to provide a configurable preload for the deflectable shims.

Abstract: The present disclosure relates to a frequency sensitive type shock absorber configured to generate a soft damping force using one dividing disk to change the damping force on the basis of a traveling speed of a vehicle and a state of a road surface, improve ride comfort and steering stability, and decrease a manufacturing cost.

Abstract: A shock absorber includes a bottomed cylindrical housing (131), a disk (134) provided movably relative to the housing and forming a housing inner chamber (171) between a bottom portion of the housing and the disk, and a facing member (139) provided on an opposite side of the disk from the bottom portion so as to face the disk. Inner periphery sides of the housing and the facing member are fastened with a piston rod (21)inserted therethrough. A protruding portion is formed on the bottom portion of the housing or the facing member. The protruding portion protrudes toward the disk and is configured to restrict movement of the disk. A seal portion (158) is provided on one side of the disk where the protruding portion is provided. The seal portion is configured to seal between an outer periphery of the disk and an inner periphery of the housing.

Abstract: A lane keeping system for a vehicle includes a first roll angle sensor configured to provide a first signal indicative of dynamic vehicle body roll. A second roll angle sensor is configured to provide a second signal indicative of an angle between vehicle sprung and unsprung masses. A lane keeping system (LKS) controller is in communication with the first and second roll angle sensors. The LKS controller is configured to discern a vehicle roll angle in response to the first and second signals based upon effects of a lateral wind force on the vehicle. The LKS controller is configured to produce a correction in response to the determined lateral wind force effects to maintain the vehicle along a desired path.

Abstract: One embodiment provides a pressure buffer device including: a cylinder that stores fluid; a flow path forming portion that forms a flow path; and an opening-closing portion that opens and closes the flow path of the flow path forming portion. The fluid flows through the flow path forming portion in accordance with relative movement of a rod with respect to the cylinder in an axial direction of the cylinder. The flow path forming portion includes an annular first protruded portion and an annular second protruded portion protruded in the axial direction in opposite sides respectively. The second protruded portion has an axial end located at a radially outer side of the first protruded portion, and a tilt portion formed at least at a part of a radially-inner part of the second protruded portion.

Abstract: A sealing arrangement includes a first and a second machine part movable relative to each other along a motional axis. A sealing element is arranged in a press fit in a plurality of grooves of a seal-holding structure of the first machine part. A sealing lip of the sealing element extends away from the seal-holding structure in the axial direction. A pretensioning element is disposed in a retaining groove of the first machine part. The sealing lip is pretensioned against a sealing surface of the second machine part in order to seal off a high-pressure region. The retaining groove has a wedge guide surface for the pretensioning element, which wedge guide surface is arranged running obliquely at an angle ?, where ?<90°, to the motional axis. The pretensioning element is movable against and along the wedge guide surface to pretension the sealing lip against the sealing surface.

Abstract: A valve component includes a first disk-shaped joining part and a second disk-shaped joining part. The first disk-shaped joining part has a first opening and has an elevation in a first region of the first disk-shaped joining part which runs at least partially peripherally around the first opening. The second disk-shaped joining part is joined to the first disk-shaped joining part and has a second opening which together with the first opening defines a channel for flow of a fluid medium therethrough. The second disk-shaped joining part further has a depression in a second region of the second disk-shaped joining part which runs at least partially peripherally around the second opening and which opposes the first region of the first disk-shaped joining part. The elevation interacts with the depression in sealing fashion.

Abstract: The invention relates to a valve component, in particular for a piston or a valve, comprising at least one first disk-shaped joining part and at least one second disk-shaped joining part, wherein the first and second joining part each have at least one opening, and wherein once the joining parts have been joined, the opening in the joining parts interacts in such a way that a channel is formed and a fluid medium can flow through the channel. In first and second regions at the joining parts, an at least partially peripheral elevation and/or depression interact with one another in sealing fashion once joined.

Abstract: A hydraulic damper (1) includes an orifice plate (33) provided with an axial projection (334) and a number of rebound flow passages (332) disposed around the projection (334). A deflectable disc (91) and an elliptical disc (92) is disposed slidably one on top of the other over the axial projection (334) to cover a compression side of the rebound flow passages (332). A cage member (34) is fixed to a piston assembly at the compression side thereof and is provided with at least one passage (341, 343). A compression spring (95) is preloaded between the cage member (34) and the discs (91, 92) to normally close the compression side of the rebound flow passages (332).

Abstract: A guide member for a vehicle shock absorber having a construction with which, even when the guide member contacts an inside tube member, the operation of the vehicle shock absorber is not obstructed. A vehicle shock absorber system is provided with an outer tube, an inner tube, a damper cylinder which is connected to the outer tube and is positioned on the inside of the inner tube, a spring guide which is fixed onto the outer circumferential surface of the damper cylinder, and a coil spring which is positioned between the inner tube and the spring guide. The spring guide is provided with a guide main body portion and a low friction portion provided in a portion of the guide main body portion which contacts the inner tube when the outer tube and/or the inner tube has been bent. The low friction portion has a lower coefficient of friction than the guide main body portion.

Abstract: In a piston valve assembly for a shock absorber, a main piston partitions a cylinder into an upper chamber and a lower chamber. Compression passages and rebound passages penetrate the main piston in a vertical direction. A first compression value forms a first compression chamber, and a top surface of a lower retainer is opened toward the upper chamber. Bypass passages are formed on an outer peripheral surface of the piston rod. A guide assembly surrounds an outer peripheral surface of the compression valve and the bottom surface of the compression valve, tightly contacts the bottom surface of the compression valve in a high-frequency section, and moves down toward the lower retainer in a low-frequency section.

Abstract: Provided is a shock absorber that includes a disk support section protruding between an intermediate seat and an inner seat, having a tip height position in a protruding direction higher than that of the inner seat and lower than that of the intermediate seat, and continuously or discontinuously disposed in an annular shape. In a state in which a first disk is pressed against the inner seat and placed on an outer seat, the intermediate seat and the disk support section, in the first disk, a first bending section bent in a convex shape toward a valve main body side is formed between the inner seat and the disk support section, and a second bending section bent in a convex shape toward a side spaced apart from the valve main body is formed between the disk support section and the outer seat.

Abstract: A shock absorber includes a piston which has at least one compression fluid passage, at least one rebound fluid passage and at least one bleed fluid passage. A compression valve assembly closes the at least one compression passage and a rebound valve assembly closes the at least one rebound passage. A bleed valve assembly with the bleed fluid passage defines a first, always open flow path through the piston and a second flow path, separate from the first flow path, through the piston. A bleed disc is movable between a first position where the second flow path is open and a second position where the second flow path is closed.

Abstract: A valve structure includes a valve disc partitioning an interior of a damper into a one-side chamber and an other-side chamber, a plurality of one-side ports and a plurality of other-side ports communicating between the one-side chamber and the other-side chamber, a one-side leaf valve opening and closing only the one-side ports, and an other-side leaf valve opening and closing only the other-side ports, the one-side ports and the other-side ports are alternately arranged in the valve disc along the circumferential direction, and a plurality of through holes formed in the valve disk is opened from the inner circumferential side of openings of all the other-side ports and communicates with the one-side ports.

Abstract: A piston valve assembly for a shock absorber is disclosed. In a high-frequency mode, a damping force control is achieved through an open passage that is always opened. In a low-frequency mode, a guide assembly moves downward due to an increase in a pressure of a first pressure chamber by a fluid moved through an inlet hole of the first pressure chamber. At this time, the guide assembly blocks the open passage and the damping force control is achieved through only a rebound passage. Consequently, it is possible to solve a fluid bottle neck through a passage formation. A disk is installed on the inlet hole to prevent a continuous increase in the pressure of the first pressure chamber, thereby effectively preventing the reduction of the damping force.

Abstract: A piston (10) comprises a first pair of passive flow-control valves (18, 20) [namely, a first compensation valve (18) and a first rebound valve (20)], a second pair of passive flow-control valves (22, 24) [namely, a second compensation valve (22) and a second rebound valve (24)], and a flow-dividing solenoid valve (14) shiftable between a first operating position [in which it allows flow of a damping fluid between an upper chamber and a lower chamber of a shock absorber through the first pair of passive flow-control valves (18, 20) and second pair of passive flow-control valves (22, 24)] and a second operating position [in which it allows the flow of the damping fluid between the upper chamber and lower chamber through only the second pair of passive flow-control valves (22, 24)]. The solenoid valve (14) is normally open (i.e., it is normally kept in the first operating position).

Abstract: A shock absorber is provided. The shock absorber includes: a piston rod; an inner passage having an inlet port at an outer periphery of the piston rod; and a stopper installed at the outer periphery of the piston rod. The stopper is disposed to surround the inlet port of the inner passage, and an outer passage extending from an upper portion of the stopper to the inlet port is formed between the stopper and the piston rod.

Abstract: A motor-vehicle shock absorber has a tube at least partially filled with damping liquid and extending, a piston rod axially shiftable inside the damper tube, and a piston connected to the piston rod and subdividing the damper tube into a piston rod-side working chamber and an opposite working chamber. An on-off control valve is axially movable inside the piston between a closed and an open position. A first soft-characteristic damping valve inside the piston through which the damping liquid may flow in both flow directions is connectable to a flow path of the damping liquid from one into the other working chamber through the control valve. A second hard-characteristic damping valve through which the damping liquid may flow in both flow directions is also provided in the piston.

Abstract: A shock absorber includes a piston assembly disposed within a pressure tube. The piston assembly has a first and a second housing and a valve assembly located adjacent the first housing. The valve assembly has a valve disc which engages the first housing to close at least one of a first plurality of passages extending through the first and second housings and a biasing member for applying a load to the valve disc.

Abstract: An air spring that can be used in an air suspension system includes a hollow piston, a hollow shaft and a body. The hollow piston has a hole through it. The hollow shaft has a shaft interior volume in communication with the hole in the piston. The body has a body interior volume in communication with the hole in the hollow piston. The hole in the hollow piston in communication with the shaft interior volume and the body interior volume provides a total interior volume. Wherein, the total interior volume is greater than the body interior volume thereby providing a linearized spring rate.

Abstract: A vehicle shock absorber generates an additional counter-force acting counter to the direction of movement near the limit position of movement. The shock absorber substantially comprises a damping medium-filled damping cylinder that is divided into two damping chambers by a main piston. The main piston is axially moveable relative to the damping cylinder and is attached to a piston rod. A second piston/damping piston that contains one or more first and second through-ducts is mounted to the piston rod. The ducts are defined by first and second flow-limiting devices such as multiple thin washers. The damping piston slides in a restricting space located in the damping cylinder. The restricting space has an inside diameter smaller than the inside diameter of the damping cylinder. The additional counter-force is substantially constant throughout the entire stroke in order to create gentle braking of the damping movement.

Abstract: In a piston valve assembly for a shock absorber, a main piston partitions a cylinder into an upper chamber and a lower chamber. Compression passages and rebound passages penetrate the main piston in a vertical direction. A first compression value forms a first compression chamber, and a top surface of a lower retainer is opened toward the upper chamber. Bypass passages are formed on an outer peripheral surface of the piston rod. A guide assembly surrounds an outer peripheral surface of the compression valve and the bottom surface of the compression valve, tightly contacts the bottom surface of the compression valve in a high-frequency section, and moves down toward the lower retainer in a low-frequency section.

Abstract: Shock absorber comprising a piston inside which a sleeve is present which can be operated separately from the piston. This sleeve is provided with through-flow conduits which can cooperate with apertures, which are fitted at a vertical distance, of a part of the piston in order to provide an auxiliary flow when the piston is displaced in the cylinder. Such auxiliary flow enters into a chamber which is delimited by one or more spring plates which act on a sleeve which loads the main valve against opening when it is pressed down by the spring plate. By filling the chamber with fluid, the load applied on the sleeve by the spring plate is reduced and the load on the main valve decreases, as a result of which the latter opens more readily.

Abstract: A damping valve includes a valve disk, a retainer, an inner peripheral side flow passage configured to include a valve disk through hole formed in an inner peripheral side of the valve disk and a retainer through hole formed in the retainer and allowing communication between one and other chambers, an outer peripheral side flow passage formed in an outer peripheral side of the valve disk and allowing communication between the one and the other chambers, and a leaf valve in the form of an annular plate arranged on a side of the retainer opposite to the valve disk and configured to openably close the inner peripheral side flow passage by an outer peripheral part. A flow passage area of the retainer through hole is not smaller than that of the valve disk through hole.