Abstract: A vehicle damper comprising a cylinder and a piston; a working fluid within the cylinder; a reservoir in fluid communication with the working fluid to receive working fluid from the cylinder in a compression stroke; and a remotely-operable valve, the valve operable to permit and restrict flow of the working fluid between the cylinder and the reservoir.

Abstract: A shock absorber has a spring positioned within a chamber. The spring provides a spring force on a piston that offsets a hydraulic force such that the forces on the piston are generally balanced when a vehicle is at rest.

Abstract: A damper including a valve movable between an open position and a closed position to selectively alter the compression damping rate of the shock absorber. The valve may include a groove feature at the location of the openings in the valve shaft which operates to accumulate the flow of hydraulic fluid through the openings and to equalize the pressure exerted by the fluid on the other components of the valve.

Abstract: The flow of hydraulic fluid induced by sliding movement of a piston in a cylinder is controlled by a pilot-type main valve and a pilot valve to generate damping force. The valve opening of the main valve is controlled by adjusting the pressure in a pilot chamber through the pilot valve. A volume compensating chamber is defined by a flexible disk member so as to face the pilot chamber. The volume compensating chamber is communicated with a reservoir through communicating passages. When the disk valve opens, the volumetric capacity of the pilot chamber reduces. At this time, the flexible disk member deflects toward the volume compensating chamber, thereby suppressing an excessive rise in pressure in the pilot chamber and preventing an unstable operation of the pilot valve and the main valve to obtain a stable damping force.

Abstract: A gas spring capable of having long and short travel modes is described. The gas spring uses liquid in combination with pressurized air to affect the travel length. Unlike conventional gas springs, the gas spring according to the invention may have its travel reduced more than, for example, by 50%.

Abstract: The invention relates to a shock absorber for an aircraft undercarriage, the shock absorber comprising a main cylinder in which a rod is mounted to slide telescopically, the shock absorber having one or more pneumatic chambers filled with gas, a supply of hydraulic fluid, and throttle means for throttling the hydraulic fluid such that when the shock absorber is shortened, the gas in the pneumatic chamber(s) is compressed and the hydraulic fluid is throttled, in which the pneumatic chamber(s) is/are fully contained in one or more auxiliary cylinders external to the main cylinder, and in each of which a sealed piston is slidably mounted to separate a pneumatic chamber contained in said external auxiliary cylinder from a fluid chamber in fluid flow communication with the main cylinder. According to the invention, the throttle means are disposed at the inlet of a fluid flow connection between the main cylinder and the auxiliary cylinder(s).

Abstract: A self-regulating suspension includes a first suspension member movable relative to a second suspension member, a fluid reservoir having a volume, the volume variable in response to a relative movement between the first and second suspension members, and a fluid flow circuit having a first end in fluidic communication with the fluid reservoir and a second end in fluidic communication with an isolated suspension location, the fluid flow circuit comprising a first valve, a second valve and a third valve, wherein said first and third valves are in parallel with each other and the second valve is in series with each of the first and third valves.

Abstract: An improvement to damping cylinders in which the damping fluid needs to be separated from a gas is disclosed. In particular, an annular bladder is used. An annular bladder allows for a control shaft to extends at least a portion of the length of the damping cylinder. This configuration effectively and simply reduces most issues that result from when an IFP is used for the same purpose.

Abstract: In a front fork in which a partition wall member is provided in an inner periphery of an inner tube, a working fluid chamber is comparted under the partition wall member and an oil reservoir chamber is comparted over the partition wall member, a main suspension spring is interposed between an upper spring bearing in a piston rod side attached to an outer tube side and a lower spring bearing in a bottom portion side of the inner tube, within the working fluid chamber of the inner tube, and a sub suspension spring is interposed between an upper spring bearing in an upper end portion side of the outer tube side and a lower spring bearing in the partition wall member provided in an inner periphery of the inner tube, within the oil reservoir chamber of the inner tube.

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: A damper including a valve movable between an open position and a closed position to selectively alter the compression damping rate of the shock absorber. The valve may include a groove feature at the location of the openings in the valve shaft which operates to accumulate the flow of hydraulic fluid through the openings and to equalize the pressure exerted by the fluid on the other components of the valve.

Abstract: A reservoir comprises an upper reservoir part and a lower reservoir part divided by a member into a first reservoir chamber and second reservoir chamber. The reservoir mounts to a shock absorber having a generally cylindrical body. At least the lower reservoir part is delimited by two parallel-displaced flat base surfaces and has a reservoir wall as a contacting surface between these base surfaces. The reservoir has a vertical extent that is substantially parallel with the shock absorber body.

Abstract: A hydraulic shock absorbing apparatus of a vehicle is described in which hydraulic shock absorbers are provided at both left and right sides of a wheel. One hydraulic shock absorber is provided with a compression side damping valve in one oil passage of a piston, is provided with a check valve in another oil passage, and is provided with a volume compensating oil passage of a piston rod communicated with an oil reservoir chamber in a piston rod side oil chamber. The other hydraulic shock absorber is provided with an expansion side damping valve in one oil passage of the piston, is provided with a check valve dosing at the time of expansion and opening at the time of compression in another oil passage, and is provided with a volume compensating oil passage of the piston rod communicated with the oil reservoir chamber in a piston side oil chamber.

Abstract: Pressure-sensitive vales are incorporated within a dampening system to permit user-adjustable tuning of a shock absorber. In one embodiment, a pressure-sensitive valve includes an isolated gas chamber having a pressure therein that is settable by a user.

Abstract: A damper for a bicycle having a primary unit and a remote unit that, in some arrangements, is substantially entirely outside of the primary unit. The primary unit includes a damper tube, a spring chamber, and a piston rod that supports a main piston. The main piston is movable within the damper chamber of the primary unit. The main piston and the damper tube at least partially define a compression chamber. The remote unit comprises a remote fluid chamber and, in some arrangements, an inertial valve within the remote unit. The inertial valve is preferably responsive to terrain-induced forces and preferably not responsive to rider-induced forces when the shock absorber is assembled to the bicycle.

Abstract: A damper for a bicycle having a primary unit and a remote unit that, in some arrangements, is substantially entirely outside of the primary unit. The primary unit includes a damper tube, a spring chamber, and a piston rod that supports a main piston. The main piston is movable within the damper chamber of the primary unit. The main piston and the damper tube at least partially define a compression chamber. The remote unit comprises a remote fluid chamber and, in some arrangements, an inertial valve within the remote unit. The inertial valve is preferably responsive to terrain-induced forces and preferably not responsive to rider-induced forces when the shock absorber is assembled to the bicycle.

Abstract: The invention relates to a suspension arrangement (1) for—loading-bearing and resilient wheel support in a motor vehicle, having at least one spring cylinder (2) with a piston (6) which is guided in a cylinder (4) such that it can be moved relative to the latter and which, on one side, has a piston rod (8) guided out of the cylinder (4) in the outward direction. The piston (6) separates, within the cylinder (4), a cylindrical working chamber (12) from an annular chamber (14), which encloses the piston rod (8). On the side of the working chamber (12), in order to generate a load-bearing spring force (F), the piston (6) acts counter to a working pressure (pA) of an elastically compressible, in particular pneumatic spring medium (FM). The piston rod (8) is telescopically variable in length via an additional spring cylinder (16), the additional spring cylinder (16) being subjected at least to a counterpressure (pG; pG1, pG2) of an elastically compressible, in particular pneumatic opposing spring medium (GM).

Abstract: A hydraulic cushion unit (1) is interposed between a frame and a rear wheel axle of a bicycle. A surplus hydraulic oil discharging passage (31a) discharges surplus hydraulic oil from the hydraulic cushion unit (1) to an accumulator (2) in contraction. A damping force generating valve (3) which maintains a closed state below a predetermined cracking pressure is disposed in the surplus hydraulic oil discharging passage (31a). A bypass passage (4) which bypasses the damping force generating valve (3) and a bypass valve (4) which opens and closes the bypass passage (L) are further provided. By closing the bypass valve (4) when pedaling of the bicycle is performed to start the bicycle, squatting of the bicycle is prevented while maintaining a shock absorbing function of the damping force generating valve (3).

Abstract: The invention relates to a suspension and damping device (1; 100; 201) for the load-bearing and spring-loaded wheel support and for the damping of suspension movements in a motor vehicle. The device comprises at least one spring cylinder (2; 114; 222) having a piston (6; 118; 226) that is guided in a cylinder (4; 116; 224) such that it can move relative thereto. This piston acts against an elastically compressible spring medium (FM) in order to generate a load-bearing supporting spring force (F), wherein for damping purposes a separate circuit of a hydraulic damping medium (DM) is provided and the circuit is independent of the spring medium (FM). The piston (6; 118; 226) inside the cylinder (4; 116; 224) separates two working chambers (10, 12; 120, 122; 228, 230) from each other, wherein the first working chamber (10; 120; 228) is associated with the spring medium (FM) and the second working chamber (12; 122; 230) is associated with the damping medium (DM).

Abstract: A monotube shock absorber that can be adjusted remotely or otherwise, and a corresponding system are provided. The monotube shock absorber includes a body tube that houses a working piston therein and a bypass tube that is attached to but external with respect to the body tube. A control valve influences flow volume and rate of oil that passes through the bypass tube in a manner that correspondingly influences damping and/or other characteristics of the monotube shock absorber. The monotube shock absorber can include a floating piston separating a volume of gas from a volume of oil. The volumes of gas and oil may be entirely housed in the body tube or may be at least partially housed in an external reservoir that can include an anti-cavitation valve.

Abstract: A piston-cylinder assembly has a working piston attached to a piston rod and dividing a working cylinder into two working spaces. An external reservoir partially filled with damping medium is provided outside the piston-cylinder assembly and is connected to one of the working spaces by a connecting pipe. The piston-cylinder assembly is provided with a stepped bore for receiving the connecting pipe, in the larger-diameter part of which a seal is held in place by the connecting pipe.

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 dampening mechanism is described having a pressure tube defining a working chamber between a rod guide proximate a first end and an end cap proximate a second end. A piston is disposed within the pressure tube and divides the working chamber into an upper working chamber and a lower working chamber. A piston rod is secured to the piston. A reservoir tube surrounds the pressure tube defining a reservoir chamber between the reservoir tube and the pressure tube. At least one passage is disposed through the pressure tube between the reservoir chamber and the working chamber and a bypass valve is disposed between the piston and the at least one passage.

Abstract: A damper for a bicycle having a primary unit and a remote unit that, in some arrangements, is substantially entirely outside of the primary unit. The primary unit includes a damper tube, a spring chamber, and a piston rod that supports a main piston. The main piston is movable within the damper chamber of the primary unit. The main piston and the damper tube at least partially define a compression chamber. The remote unit comprises a remote fluid chamber and, in some arrangements, an inertial valve within the remote unit. The inertial valve is preferably responsive to terrain-induced forces and preferably not responsive to rider-induced forces when the shock absorber is assembled to the bicycle.

Abstract: A damper for vehicles is arranged with selectable or adjustable damping force characteristics that are essentially independent of other internal or external function factors in the damper. For this, fixing devices and a surrounding arrangement, piston arrangement and piston rod arrangement are utilized. In the event of a damping force arising on the arrangement's piston in a certain direction of the piston, an operating device with valves and pipes is arranged to ensure that there is an increase in pressure on the side of the piston facing towards the direction, while the pressure is essentially maintained on the side of the piston facing away from the direction. In addition, pressure-maintaining devices are included that ensure that the pressure in the arrangement is maintained in the event of the occurrence of pressure-affecting parameters. The damper is preferably arranged with adjusting devices that determine the damping force characteristics according to their setting.

Abstract: A suspension unit, for example for a track-laying vehicle, comprises an oil-filled cylinder within which a piston, connected to a piston rod, is provided. The cylinder 4 is oil-filled, and communicates with an upper region of a spring chamber, the lower region 46 of which contains gas under pressure. The piston rod has a hollow interior filled with gas under pressure. The piston is connected by a connecting rod to a secondary piston which is slidable within the piston rod. On rebound the piston rod and the piston move relatively to each other between a retracted end position and an extended end position. During this movement and the return movement, oil is transferred, by way of apertures between damping chambers which serve to damp the relative movement of the piston and the piston rod so avoiding shock loading at the end positions of the movement.

Abstract: A suspension unit (110) for a suspension system has an accumulator(112) for holding and maintaining a fluid such as a gas under pressure. The accumulator is associated with a motion damping unit (114) that is filled with a fluid, such as an oil, in operation. The accumulator includes a floating piston (122) that separates a first chamber (120) in which is stored the pressurized gas, and a second chamber (124) for storing the other fluid under pressure. A third chamber (128) in the motion damping unit (114) is in fluid flow communication with the second chamber (124) of said accumulator through valve means (126) controlling the flow of fluid between the chambers.

Abstract: The present invention provides an adjustable hydraulic damper for vehicles, which enables the running vehicle to generate kinetic energy through the extrusion of piston and piston rod in the hydraulic damper, thus allowing for circulating supply of high-pressure oil and providing kinetic energy to the vehicles under the control of inlet and outlet check valves installed on both sides of the hydraulic damper.

Abstract: A both-side rod type damper (11) is arranged in a storage chamber (40) formed inside an inner tube (2) and an outer tube (3), rods (31) and (32) of the damper (11) are coupled so as to move by the same quantity in accordance with the extending or retracting operation of a front fork, a bearing (5) for slidably supporting the rod (32) is provided at a cylinder end, the bearing (5) is movable by a predetermined quantity in a radius direction and an axial direction of the rod relative to the cylinder, and the bearing (5) moves toward the inside of the cylinder to communicate the oil chamber R2 with the storage chamber (40) when the pressure of the storage chamber (40) is higher than the pressure of the oil chamber R2 in the damper (11), and the communication is shut down when the movement is made to the opposite side thereof.

Abstract: A damper (400) including a pressure-sensitive damping control circuit that selectively permits fluid flow from a first chamber (406a) to a second chamber (448). A piston (410) is supported for reciprocation to vary a volume of the first chamber. A blow-off piston (429) is movable between a closed position, wherein fluid flow through the control circuit is substantially prevented, and an open position, wherein fluid flow through the control circuit is permitted. The damper also includes a first source of pressure. A fluid pressure created by compression of the damper applies an opening force to the blow-off piston tending to move the blow-off piston in a direction toward the open position against a resistance force provided by the first source of pressure. The resistance force is greater than the opening force until the pressure created by forces tending to insert the piston rod into the first fluid chamber exceeds the pressure in the first source of pressure by a predetermined amount.

Abstract: The invention relates to a gas pressure shock absorber for vehicle chassis having a damper tube (1) and a piston rod (3) which supports a working piston (2) and is disposed in a reciprocally moveable manner in the damper tube (1), wherein a first partial volume (1a) of the inner space of the damper tube (1) can be filled with a damping fluid and a second partial volume (1b) of the inner space of the damper tube (1) can be filled with a gas, and wherein the gas pressure shock absorber has a device for regulating the vehicle level, which is actuated by the introduction of a gas under pressure into the inner space of the damper tube (1).

Abstract: A suspension apparatus for use in a vehicle including a first liquid passage; a first connection portion; a first accumulator which is connected to the hydraulic suspension device via the first connection portion and the first liquid passage; a second liquid passage; a second connection portion; a second accumulator which is connected to the first liquid passage via the second connection portion and the second liquid passage; and a liquid-flow control device which controls a flow of a hydraulic liquid between the hydraulic suspension device and at least one of the first and second accumulators, wherein the first liquid passage and the first connection portion allow the hydraulic liquid to more easily flow therethrough into the first accumulator than the second liquid passage and the second connection portion allow the hydraulic liquid to flow therethrough into the second accumulator.

Abstract: A variable valve for impact dispersal of a force, such as a force caused by an impact or explosion. The apparatus includes a valve with a spring biased piston that engages an outlet bore as the piston moves in response to the pressure of a fluid at an inlet port. The valve is in fluid communication with a cylinder that receives an impulse force. The fluid flow from the cylinder is controlled by the variable valve, which disperses the force accordingly at a controlled rate. In one embodiment, a pressurized reservoir is connected to an extension valve and a check valve that allows the cylinder to be filled with fluid from the reservoir when the extension valve is actuated. Applications for such a system include connection to aircraft seats and to aircraft landing gear.

Abstract: In a damping force adjusting structure of a hydraulic shock absorber, a blow valve blowing an oil liquid in a rod side chamber to a back pressure chamber is provided in a back pressure introduction path introducing the oil liquid in the rod side chamber to the back pressure chamber, and a blow valve has a first pressure receiving portion capable of receiving the pressure of the rod side chamber before and after the valve opening, and a second pressure receiving portion capable of receiving the pressure of the rod side chamber after the valve opening.

Abstract: In a damping force adjusting structure of a hydraulic shock absorber, a blow valve blowing an oil liquid in a pressurized piston side chamber to a rod side chamber is provided in a bypass path communicating the rod side chamber and the piston side chamber while bypassing a damping valve, and the blow valve has a first pressure receiving portion which can receive the pressure of the piston side chamber before and after the valve opening, and a second pressure receiving portion which can receive the pressure of the piston side chamber after the valve opening.

Abstract: A bicycle suspension assembly having an inertia valve is described. A blow-off valve that permits fluid flow through the suspension assembly when the fluid pressure in the suspension assembly exceeds a predetermined threshold may be included.

Abstract: A suspension system dampens motion between two components of a vehicle, such as the wheels and the chassis. An assembly of a cylinder and a piston is connected to both components. The piston defines first and second chambers in the cylinder and has a shaft with an end surface exposed to pressure within a third chamber of the cylinder. A first accumulator is connected to the first chamber by a first accumulator valve and a second accumulator valve connects a second accumulator to the second chamber. A damping valve alternately connects the third chamber to either the second chamber or a fluid tank wherein that connection defines the stiffness of the suspension system and is made in response to force acting on the suspension system. A load leveling circuit also is described.

Abstract: A bicycle suspension assembly including an inertia valve is described. The suspension assembly includes first and second telescopingly engaged tubular portions configured to move closer together during compression of the suspension assembly. The bicycle suspension assembly may include an air spring tending to expand the bicycle suspension assembly.

Abstract: A damper including a valve movable between an open position and a closed position to selectively alter the compression damping rate of the shock absorber. The valve may be responsive to a vertical acceleration sensor.

Abstract: A shock absorber comprises first and second axially aligned cylinders (11, 21) each having a liquid filled prison chamber (12, 22), an axially displaceable piston (13, 23), received in the piston chamber (12, 22), and dampeners (14, 24) for dampening axial displacement of the piston (13, 23) through the liquid in the piston chamber (12, 22). A piston rod (1) axially extends between and into the first and second cylinder piston chambers (12, 22). The first and second axial ends (1a, 1b) of the piston rod (1) are connected to the first and second cylinder pistons (13, 23), respectively.

Abstract: In a hydraulic shock absorber, a first oil chamber (R1) around the piston rod (2) and a second oil chamber (R2) on the opposite side are separated by a piston (3). A communicating passage (L) is disposed on the outside of the cylinder (1) to connect the first oil chamber (R1) and the second oil chamber (R2). An elongation damping valve (4) is installed in the communicating passage (L). When the piston (3) performs an elongation stroke, the entire amount of working oil that has flowed out from the first oil chamber (R1) is supplied to the second oil chamber (R2) via the elongation damping valve (4). As a result, the second oil chamber (R2) does not suffer a shortage of working oil and when the piston (3) shifts to the contraction stroke, a response in generation of damping force can be improved.

Abstract: Presented is a piston-cylinder unit. The piston-cylinder unit includes an outer tube defining a cavity, a working cylinder disposed in the cavity of the outer tube and filling only a portion of the cavity. The unfilled portion of the cavity is a compensating space. The compensating space is divided into an area filled with a damping medium and an area filed with a gas. The piston-cylinder unit further includes a piston rod that includes a damping piston. The piston rod is disposed in the working cylinder and has freedom of axial movement, and is configured to displace the gas. The piston-cylinder unit further includes a reservoir that has a variable volume configured for actuating the compensating space.

Abstract: A gas chamber (G) and a liquid chamber (R) are separated by a free piston (2) in a cylinder (1) of a hydraulic damper. The free piston (2) comprises a hollow main body (3), a metal bellows (4) which elongates and contracts according to a pressure balance between the gas chamber (G) and liquid chamber (R), and a stopper (8) fixed to the main body (3) for preventing the metal bellows (4) from elongating beyond a predetermined length. By compensating for variation in the capacity of the liquid chamber (R) caused by a displacement of the piston (10) in the cylinder (1) by elongation or contraction of the metal bellows (4), the damping characteristic of the damper is prevented from becoming unstable due to a frictional force acting on the free piston (2). The stopper (8) prevents excessive stress from being exerted on the metal bellows (4).

Abstract: A damper includes a piston rod, a damping piston, at least one cylinder containing a damping liquid, a fixed partition member for partitioning the interior of the damper into two liquid chambers, a pressure source, and a valve in communication with the pressure source which reacts as a function of the pressure. The valve can also be in communication with additional forces, such as mechanical spring forces, which can be adjustable. The valve can include a pressure intensifier. The valve generates fluid flow resistance during flow of liquid in a first direction through the partition member. The fluid flow resistance in the first direction varies according to the amount of force communicated to the valve by the pressure source and any additional forces. The partition member can include means for providing low-resistance return flow of liquid in a second direction.

Abstract: A damping force is generated by keeping a damping force control valve closed when a piston of a hydraulic shock absorber starts to move from compression side dead center or expansion side dead center. A damping force control valve including a poppet valve for opening and closing a first fluid path is provided. A pilot pressure chamber defined from the fluid path by a valve element of the damping force control valve is provided. A linear solenoid and a pilot valve for increasing and reducing the hydraulic pressure in the pilot pressure chamber are provided. A check valve disposed in parallel with the damping force control valve is provided in a piston. A communication path for communication between the first fluid path downstream of the damping force control valve and the pilot pressure chamber is provided.

Abstract: A front fork, which is interposed between a vehicle body and an axle to restrain a change in vehicle attitude, comprises a fork body (101) including a reservoir chamber (106) partially filled with gas and performing an expansion and contraction operation, a reservoir tank (102) partially filled with gas and communicating with the reservoir chamber (106) through a flow path (103) in which hydraulic oil flows, an on-off valve (35) switching between opening and closing of the flow path (103), and a relief valve (40) accepting flow of hydraulic oil from the reservoir chamber (106) toward the reservoir tank (102) when a pressure of the reservoir chamber (106) reaches a predetermined pressure.

Abstract: One of a pair of the hydraulic shock absorbers each mounted in the right and left sides of a front wheel for a two-wheel vehicle includes a contraction-side damping valve (5a) disposed in a flow passage (11) communicating a rod-side oil chamber (R1) with a piston-side oil chamber (R2), the contraction-side damping valve (5a) permitting an operating oil to flow from the piston-side oil chamber (R2) to the rod-side oil chamber (R1) only when a volume in the piston-side oil chamber (R2) is reduced, and a contraction-side check valve (6) disposed in a flow passage (10) communicating the piston-side oil chamber (R2) with the reservoir (R), the contraction-side check valve (6) permitting the operating oil to flow from the reservoir (R) to the piston-side oil chamber (R2) only when a volume in the piston-side oil chamber (R2) is increased.

Abstract: A telescopic fork leg with damping system comprising piston and piston rod arrangements. The arrangements perform longitudinal shift motions in a medium-containing chamber. The chamber is situated in a tubular part belonging to the damping system. The piston rod arrangement is designed so as in the chamber, with its parts present therein, to have substantially constant volume regardless of the shift motions. Substantial displacement creation is thereby prevented. Moreover, the medium strives to assume and maintain a particular pressure, preferably a positive pressure, on the low-pressure side of the piston arrangement. Positive pressure build-up is therefore present in the damping system and the pressure on the low-pressure side does not need to be lower than the system pressure. A valve arrangement for handling a displacement can therefore be eliminated and the telescopic fork leg can be given an advantageous and easy-to-use structure with, for example, adjustment facilities for leak flows.

Abstract: A hydraulic control circuit (100) comprises a source (180) of fluid pressure having a fluid inlet (201) and a fluid outlet (202); a fluid reservoir (181) fluidly connected to the fluid inlet of the pressure source; an attenuation means (111) having a fluid inlet (203) fluidly connected to the fluid outlet of the pressure source, and a fluid outlet (204); a pressure control valve (199) fluidly connected to the fluid inlet of the attenuation means and to the fluid reservoir or the fluid inlet of the pressure source; and one or more valves (82-84) fluidly connected to the fluid outlet of the attenuation means.

Abstract: A suspension damper includes a housing bounding a main chamber. A hydraulic fluid is disposed within the main chamber. A piston rod is selectively movable between an advanced position wherein a portion of the piston rod is advanced into the main chamber and a retracted position wherein the portion of the piston rod is retracted from the main chamber, wherein as the piston rod is moved a fluid pressure of the hydraulic fluid within the main chamber progressively increases and a portion of the hydraulic fluid passes through a passage within the housing. A control valve is at least partially disposed within the main chamber, the control valve being moved by the fluid pressure of the hydraulic fluid so as to progressively restrict the flow of the hydraulic fluid through the passage as the fluid pressure of the hydraulic fluid within the main chamber progressively increases.