Abstract: The present disclosure provides a method of manufacturing a damper for a vehicle. The method includes forming a groove on an outer surface of a first component in a first annular region. The first component is tubular. The method further includes inducing a compressive residual stress in a second annular region. The second annular region is at least partially aligned with the first annular region along a longitudinal axis of the first component. The method further includes coupling a second component to the first component. Surfaces of the first component and the second component directly engage one another at an interface. The second component is axially aligned with and radially surrounding at least a portion of the first annular region. In some configurations, forming the groove and inducing the compressive residual stress are performed concurrently, such as by low plasticity burnishing.

Abstract: A damper assembly comprises a main tube defining a fluid chamber. The main tube includes a first section, a second section, and an intermediate portion. A sleeve is disposed about the main tube. An external tube is disposed about the main tube and the sleeve. The external tube defines a compensation chamber between the sleeve and the external tube. A main piston divides the fluid chamber into a rebound chamber and a compression chamber. A piston rod couples to the main piston for moving the main piston between a compression stroke and a rebound stroke. The sleeve is in an abutment relationship with the second section of the main tube, radially spaced apart from the first section of the main tube, defining a compartment extending between the sleeve and the first section of the main tube. A housing for the damper assembly is also disclosed herein.

Abstract: The invention relates to a method for monitoring a state of wear of a damping device within a system. The system includes a vehicle seat having a first portion which is movably mounted in at least one direction with respect to a second portion, a damping device for damping oscillations is arranged between the first portion and the second portion, and a first sensor that determines an instantaneous relative position of the first portion with respect to the second portion. A displacement function in relation to the relative position of the first portion with respect to the second portion is defined as a function of time, and a current value of the displacement function is determined at selected intervals and summed. The sum is compared with a predetermined first limit.

Abstract: A damper includes a damper tube (a pressure tube or a reserve tube for a mono-tube or a double tube damper respectively) including a first end and a second end opposite to the first end. The damper includes a base member. The base member includes a cup portion at least partially enclosing the first end of the damper tube, and a sleeve portion extending from and integral with the cup portion. The sleeve portion surrounds a length of the damper tube. The sleeve portion is attached to the damper tube. Further, the damper includes a knuckle engaged with the sleeve portion such that the sleeve portion is disposed between the knuckle and the damper tube.

Abstract: An air spring assembly is disclosed. The air spring assembly includes an upper fork tube having a base lug on one end, a lower fork tube having an opening to receive the upper fork tube in a first axial end, and a fork tube gas seal to form a gas seal between the upper fork tube and the lower fork tube. A partial cartridge tube within a portion of the upper fork tube, the partial cartridge tube including a partial cartridge tube gas seal between an outer diameter (OD) of the partial cartridge tube and an inner diameter (ID) of the upper fork tube. An annular volume formed between the ID of the upper fork tube, the OD of the partial cartridge tube, the partial cartridge tube gas seal, and the base lug of the upper fork tube.

Abstract: A shock absorber includes: a cylinder which is filled with a fluid; a piston valve which includes a valve seat dividing an inner space of the cylinder, a passage which is formed in the valve seat and through which the fluid passes, and a valve disposed to cover the passage and interfering with a flow of the fluid; a performance controller which is disposed in the cylinder to control at least one of a spring constant, a damping force, or a combination thereof; and a piston support which is connected to the piston valve and exposed to an outside.

Abstract: A metallic liner includes a cylindrical body defining a wear resilient surface, and a bearing carrier extending radially inward from the wear resilient surface, wherein the wear resilient surface and the cylindrical body are formed as a monolithic piece.

Abstract: A stationary exercise bike has an exercise bike body assembly and a desk plate assembly. The desk plate assembly includes a desk plate and a fixing seat for the desk plate. The desk plate is in slide connection with the fixing seat for the desk plate. The fixing seat for the desk plate is connected with the stationary exercise bike body assembly through a lifting assembly. The fixing seat for the desk plate can be lifted up and down relatively to the stationary exercise bike body assembly due to the connection of the lifting assembly.

Abstract: A shock absorber having a shock absorber tube (10) is disclosed and has an external module tube (11) which is connected to the shock absorber tube (10) via a flange (12), wherein the flange (12) has one or more fluid ducts (13, 14) which fluidly couple the module tube (11) to the shock absorber tube (10). The flange (12) has at least one metallic support cage (15) which forms a retentive connection between the shock absorber tube (10) and the module tube (11), and the flange (12) has a plastics body (16) in which the fluid duct (13, 14) for the fluidic coupling of the module tube (11) to the shock absorber tube (10) is formed.

Abstract: Provided is a liquid pressure device having no dead band in generation of force and causing no contamination, the liquid pressure device including a bottom cap and a head cap welded to an outer tube, and a rod guide fastened to the head cap, and one end of a pipe is fit in the bottom cap and the other end of the pipe is fit in the rod guide, and the bottom cap and the rod guide sandwich a cylinder. Accordingly, the liquid pressure device of the present invention can add shaft force to the cylinder while supporting the pipe, an inside of which is isolated from a tank, by the bottom cap and the rod guide, and does not need to braze the pipe to the bottom cap. Therefore, the liquid pressure device of the present invention has no dead band in generation of force and causes no contamination.

Abstract: A system for monitoring the track tension for a track assembly of a work vehicle may include a track tensioning assembly having a fluid-driven actuator. The actuator may be configured to adjust the track tension of the track assembly based on a fluid pressure of fluid within the actuator. The system may also include a wireless pressure sensor provided in operative association with the actuator that is configured to detect the fluid pressure within the actuator. Additionally, the system may include controller communicatively coupled to the wireless pressure sensor. The controller may be configured to monitor the fluid pressure within the actuator based on wireless pressure signals received from the wireless pressure sensor, wherein the monitored fluid pressure is indicative of the track tension for the track assembly.

Abstract: In various embodiments, a two stage shock strut for use in a landing gear assembly may comprise a first cylinder, a fill port, a first stage piston head, a second cylinder, a second stage piston head, and a bleed tube. The first cylinder may define a first volume. The fill port valve may be in fluid communication with the first cylinder and configured to receive hydraulic fluid. The first stage piston head may be in fluid communication with the first volume. The second cylinder may comprise a metering pin. The metering pin may be in fluid communication with the first volume and a second volume defined by the second cylinder. The metering pin may be configured to receive the hydraulic fluid from the first volume and purge gas from the second volume. The second stage piston head may be in fluid communication with the second volume.

Abstract: A shock absorber is provided having a housing, an inner tube, a piston rod, a piston which divides the interior of the inner tube into a lower chamber and an upper chamber, a first valve arrangement on the piston, a second valve arrangement at the upper end of the inner tube, and a third valve arrangement at the lower end of the inner tube. The shock absorber includes a first connection element on the lower chamber of the inner tube and a second connection element on the upper chamber of the inner tube, to connect a means for controlling the flow resistance of the working medium in the first valve arrangement and an ascending pipe which projects into the working medium received in the housing and by which working medium can be transferred from the housing acting as a tank into the upper chamber of the inner tube.

Abstract: A shock absorber including a piston inserted into a cylinder (2) having a hydraulic oil sealed therein. An outer tube (3) is provided around the outer periphery of the cylinder to form a reservoir (4) therebetween. A bottomed circular cylindrical casing (25) is joined to a side surface portion of the outer tube, and a damping force control valve (27) is housed in the casing. The bottomed circular cylindrical casing has a bottom (25A) formed with a joint surface (25B) curved along the outer peripheral surface of the outer tube and a flat inner surface (25C). The casing is integrally formed by forging.

Abstract: A vibration isolator assembly includes a bellows component, a piston component, a shaft component, and a housing component, wherein at least one of the bellows component, the piston component, the shaft component, and the housing component is formed using additive manufacturing techniques.

Abstract: A fluid pressure damper is provided with a damper main body composed of an outer tube and an inner tube, a bottom member for sealing a bottom side opening of the damper main body, a suspension spring and a damper. The damper includes a cylinder storing a working fluid inside. The cylinder is inserted into the inner tube and fixed to the bottom member by being sandwiched between a head member fixed to a joint member coupled to the inner tube and the bottom member. The joint member includes a stopper member with the inner periphery of which the head member is threadably engaged, and a pin member which couples the stopper member to the inner periphery of the inner tube. The suspension spring is supported by the stopper member.

Abstract: A vibration damper including a cylinder with a cylinder-side connection member. The at least one mounted component is fastened to the cylinder by a material bond. The cylinder and the mounted component are made of plastic. The mounted component and/or the cylinder are based on at least one ready-prepared semi-finished product that forms the surface of the vibration damper on at least one body side in the final state. Plastic supplemental volume fractions determine the finished body contour.

Abstract: A shock absorber for a vehicle contains a shock absorber tube in which at least one shock absorber piston is guided in a sliding manner. The shock absorber tube is made of a carbon fiber composite material and has a coating made of an epoxide on the inside of the shock absorber tube, which coating forms the sliding partner for the shock absorber piston guided in the shock absorber tube. A method is explained for producing the shock absorber tube for the shock absorber and to the use of a tube made of a carbon fiber composite material having an epoxide coating to form a shock absorber tube for a shock absorber.

Abstract: Vibration damper includes a tubular body to which an external part, which acts as a stop, is fastened. A component such as a steering knuckle, which is supported against the stop, is also fastened to the tubular body. When a normal load on the component is exceeded, a deformation area allows the component to shift on the tubular body.

Abstract: A colloidal damper includes: a cylinder; a piston guided and supported by the cylinder and defining a closed space in association with the cylinder; a porous body having a multiplicity of first pores and being housed in the closed space; a liquid contained in the closed space together with the porous body, the liquid flowing into the first pores of the porous body when pressurized, and flowing out from the first pores of the porous body when the pressure is relieved. The damper may include a partition wall which has a multiplicity of second pores and which isolates the porous body from a frictional area, each of the second pores having a diameter smaller than the outer diameter of the porous body. The porous body may have an outer diameter larger than the size of the gap formed between the cylinder and the piston.

Abstract: Provided is a shock absorber enabling stable stop by damping at a terminal of a stroke and covering demanded impact-absorbing models. The shock absorber has a piston chamber, a start part for piston movement, a decelerating part, and an end part for stopping the piston. The start part forms a curve to provide a diameter larger than a virtual tapered surface formed within a stroke range of the piston and to be outward to a central axis of the piston chamber. In the decelerating part, a variation of diameter reduction is increased with the result that the diameter becomes smaller than the tapered surface, and a curve is formed so the change in variation of diameter reduction reaches the maximum variation point and turns negative. In the end part, the variation of diameter reduction is decreased with the result that a curve which enables piston stopping by damping is formed.

Abstract: The invention relates to a hydro-pneumatic piston accumulator (1), particularly for vehicle suspension systems, consisting of an accumulator housing (2) and a separating piston (6), which is disposed free-floating inside the accumulator housing in a displaceable manner in the direction of the movement axis (4). The separating piston separates an accumulator area (8) for a hydraulic medium from a pressure area (10) that is filled or is to be filled with a compressible medium, and is guided with an interior guide opening (30) on an elongated guide element (32), which is axially fixed within the accumulator housing (2).

Abstract: In a combined deceleration and acceleration device for the controlled closing and opening of, for example, furniture parts, a base part consisting of a cylinder and a guide structure is provided wherein a drag element is movably supported by the guide structure, and a piston with a piston rod is connected to the drag element which has a park position remote from the cylinder and is biased by an energy storage structure toward the cylinder for moving the piston into the cylinder in a controlled decelerating manner while carrying along the drag element and a movable part engaged with the drag element.

Abstract: An identical engagement hole 12b is formed in each of first and second brackets 1, 2. A first engagement portion 31c is formed in a damper body 31 of a rotary damper 3. A distal end portion of a rotor 32 of the rotary damper 3 is non-rotatably inserted in an adapter 4. A third engagement portion 46 is formed in an outer circumference of the adapter 4. The first engagement portion 31c is non-rotatably inserted in the engagement hole 12b of the first bracket 1. The third engagement portion 46 is non-rotatably inserted in the engagement hole 12b of the second bracket 2.

Abstract: A hydraulic shock absorber having a plurality of tubes (outer and inner tubes), which constitute a multiple-walled cylinder to be inserted inside a damper tube, held and secured between a rod guide and a support piece under a compressive load applied to all of the tubes. In the hydraulic shock absorber (10), a contact surface (P), where an end surface of the inner tube (13B), of the tubes (13A, 13B) of the cylinder (13), is in contact with a seating surface (201) of a rod guide (21) in the axial direction, is formed intermittently at a plurality of circumferential positions on the end surface of the inner tube 13B in the state where the tubes (13A, 13B) of the cylinder (13) are held and secured.

Abstract: A lockable piston-cylinder unit includes a cylinder having at least one axially facing counterstop; a piston dividing the cylinder into a first working chamber and a second working chamber; a piston rod extending through the first working chamber to a free end outside the cylinder; and a fastening tube having a first end in which the free end of the piston rod is fixed, a second end which receives the cylinder coaxially, and at least one axially facing supporting stop. When the piston rod is extended to maximum extension, the fastening tube is rotatable relative to the cylinder from a release position, wherein the supporting stop is offset from a respective counterstop, to a locking position, wherein the supporting stop faces the counterstop so that the fastening tube cannot move axially relative to the cylinder.

Abstract: Methods for easily adjusting a shock and strut assembly to modify the ride height of a vehicle by providing one or more spacers to be placed between the lower spring seat mount and the spring seat plate that rests upon it in order to raise the ride height of a vehicle. Embodiments include a unique location for a lower spring seat mount. The position of the lower spring seat mount may be lowered to reduce the ride height of the vehicle, and one or more spacers may be inserted above the lower spring seat mount to raise the ride height of the vehicle.

Abstract: A front fork for easily optimizing an oil quantity in a damper cylinder with a relatively simple structure without affecting operability of a free piston even in an assembled state. An escape portion is formed on an outer periphery of a piston rod at a position where a seal member mounted on a sealing cap faces in an opposed manner when a front fork extends to the maximum.

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

Abstract: In the inside of a cylinder tube, there are provided a piston chamber and an adjusting chamber communicating each other, and these both chambers are filled with oil in a pressurized condition, and further, there are provided a piston moving in an axial direction in the piston chamber and a rod coupled to the piston. An elastic member is located in the inside of the adjusting chamber in a state that a reservoir tank is formed in the adjusting chamber by being compressed by pressurizing force of the oil, and impact is absorbed in such a way that the elastic member is caused to extend and contract by the oil flowing in/flowing out the reservoir tank by movement of the rod.

Abstract: A joined body includes a first member having a female portion, and a second member having a male portion inserted in the female portion at one end, and an annular groove along an outer circumference of the male portion. The first member and the second member are fitted to each other. A plurality of joint portions is formed on a side wall of the female portion. The joint portions are joined to the male portion by being pushed in the annular groove. A pressing member is formed at the female portion so as to face a position of the male portion axially different from the annular groove of the male portion. The pressing member is pressed against the male portion.

Abstract: A piston with a piston rod coupled thereto is inserted in a cylinder, which sealingly contains oil. An oil flow generated by movement of the piston is controlled by a damping force generation mechanism, thereby generating a damping force. A separator tube is disposed around the cylinder, and the oil is transmitted to the damping force generation mechanism through a branch tube integrally formed on a cylindrical sidewall of the separator tube. The branch tube is tapered at the outer circumferential portion thereof with the outer diameter thereof reducing toward the distal end of the branch tube.

Abstract: A fluid pressure shock absorber comprises a cylinder 3 disposed in a tube 2 and having a base supported by the tube 2 and a head member 31 fitted onto a tip of the cylinder 3. A hole 2b is formed in the tube 2 facing the head member 31. A ring-shaped stopper member 101 is screwed onto an outer circumference of the head member 31. A pin member 102 held by the head member 31 and biased in a radial direction by a snap ring 103 penetrates the hole 2b, thereby making connection of the tube 2 and the cylinder 3 easy.

Abstract: A vibration damper including a cylinder in which a displacer carries out a translational movement. The displacer has a work piston which divides the cylinder into two work spaces. The work spaces outside the displacer for each operating movement direction of the displacer are connected to damping valves by a flow connection. Every flow connection has only one flow direction through a check valve arrangement. The flow connection has a plurality of inflow ports which are offset in axial direction starting from the work spaces and is formed by a bypass channel, and a plurality of damping valves are connected to the bypass channel and admit damping medium via the inflow ports.

Abstract: A strut assembly includes an upper mount assembly, a shock absorber and a knuckle. The upper mount assembly is attached to a piston rod which is a part of the shock absorber. The knuckle is attached to an outer tube of the shock absorber which can be a reserve tube of a dual-tube shock absorber or a pressure tube of a single tube shock absorber. A reinforcement member increases the strength of the outer tube in the area that interfaces with the knuckle and the area that is directly above the knuckle.

Abstract: In lifting columns (1) for tables and similar articles of furniture and consisting of pipe profiles (2a, 2b) with intermediate slides (8), it is a problem that the profiles (2a, 2b) have relatively great dimensional tolerances. This means that the gap between two successive sections may vary relatively much, which causes a great play in the column. This is solved in that at least one of these sections (2a) at one of the slides (8) is formed with a local deformation of the wall inwards toward the slide to press the slide inwards against the following section (2b). The dimensional tolerances may be neutralized by suitable arrangement and selection of deformations as well as the force with which the deformation is made.

Abstract: A strut assembly includes an upper mount assembly, a shock absorber and a knuckle. The upper mount assembly is attached to a piston rod which is a part of the shock absorber. The knuckle is attached to an outer tube of the shock absorber which can be a reserve tube of a dual-tube shock absorber or a pressure tube of a single tube shock absorber. A reinforcement member increases the strength of the outer tube in the area that interfaces with the knuckle.

Abstract: A protective pipe for a piston-cylinder unit comprises a pipe body having at one end a bottleneck-shaped base which is axially and radially supported at least indirectly at a piston rod of the piston-cylinder unit. A surface region of the bottleneck-shaped base has an accumulation of material which increases radially inward starting from its outer edge.

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

Abstract: A vibration damping device for hydraulic shock absorbers for vehicles, having two cartridges, each associated with a shock-absorber integrated in a component of a vehicle, and each comprising a tubular body, with a piston that forms two chambers with variable volumes of incompressible fluid, a first compression chamber, and a second extension chamber. Each piston is carried by a stem exiting from an end of the tubular body and associated with part of the shock-absorber. The piston is provided with bleeding orifices for fluid bleeding. Flow control and throttling for the orifices are provided.

Abstract: A shock absorbing device may include a first stem having an inner surface extending along a longitudinal axis, and a second stem configured to receive a portion of the first stem. The shock absorbing device may also include a guide member having an outer surface configured to prevent the first stem from rotating relative to the guide member. The shock absorbing device may further include a shock absorbing structure disposed between the first stem and the second stem. The shock absorbing device may further include a bearing device configured to rotatably guide movement of the first stem relative to the second stem along a direction substantially parallel to the longitudinal axis of the first stem and prevent radial sway between the first and second stems.

Abstract: A strut assembly includes an upper mount assembly, a shock absorber and a knuckle. The upper mount assembly is attached to a piston rod which is a part of the shock absorber. The knuckle is attached to an outer tube of the shock absorber which can be a reserve tube of a dual-tube shock absorber or a pressure tube of a single tube shock absorber. A reinforcement member increases the strength of the outer tube in the area that interfaces with the knuckle.

Abstract: A variable damping-force damper includes a cylinder tube filled with magnetic particles (MRF), a piston that is slidably disposed within the cylinder tube, a piston rod connected with the piston and is disposed so as to protrude out of one end of the cylinder tube and a rod guide that closes one end of the cylinder tube and slidably supports the piston rod. The cylinder tube has a Ni plating film whose Vickers hardness is 800 VHN or more on its inner peripheral surface and the piston slides relative to the Ni plating film. The rod guide has a structure having a predetermined base material portion and a fluorine resin contained Ni plating film that is treated by heat and is provided on the surface of the base material portion. The piston rod slides relative to the fluorine resin contained Ni plating film.

Abstract: A vibration damper has a working cylinder and a working piston axially displaceable therein. A compensation cylinder has a compensation piston axially displaceable therein. The compensation cylinder is situated at the longitudinal end of the working cylinder and diagonally thereto.

Abstract: In a pull arrangement including a housing with a guide structure movably supporting a carrier element which has a park position at one end of the guide structure and a rest position at the other end and a reversing structure is provided at the other end of the guide structure and a tension spring extending around the reversing structure is connected with one end to the carrier element and the opposite end to the housing for moving the carrier element to the end position, the tension spring comprises an area of high spring stiffness where it extends around the reversing structure and an area of low spring stiffness where the spring is connected to the housing away from the reversing structure.

Abstract: A steering damper can generate a smaller damping force according to a first damping force characteristic or a larger damping force according to a second damping force characteristic by controlling a flow of hydraulic oil during a steering operation of a steering member. When the associated vehicle is running at a relatively low or medium speed and is not accelerating, and if an operational speed of the steering damper is lower than a predetermined value, damping force according to the first damping force characteristic can be generated in the steering damper. On the other hand, when the operational speed of the steering damper is equal to or higher than the predetermined value, damping force according to the second damping force characteristic can be generated in the steering damper.

Abstract: The invention relates to a rapid recovery shock absorber system with hydraulic end stop, comprising a stem (3) and a body (1), in which a piston (8, 9, 10, 11) runs which is fixed to a tube (71) and which defines at least one upper chamber (S) and one lower chamber (I) in the body (1). A body (32, 32a) in the stem (3) comprises a housing (321), in which a piston (33, 33a) runs which is connected to a rod (7) which slides in the tube (71). A clamp (31), for fixing the shock absorber system to the vehicle, tensioning means (35, 37, 39), exerting a force which tends to displace the piston (33, 33a), sliding in the stem body (32, 32a), driving the displacement of the rod (7) which results in the opening or closing of a section of an oil passage in the lower chamber (I) towards the upper chamber (S) are also provided.

Abstract: A piston with a piston rod coupled thereto is inserted in a cylinder, which sealingly contains oil. An oil flow generated by movement of the piston is controlled by a damping force generation mechanism, thereby generating a damping force. A separator tube is disposed around the cylinder, and the oil is transmitted to the damping force generation mechanism through a branch tube integrally formed on a cylindrical sidewall of the separator tube. The branch tube is tapered at the outer circumferential portion thereof with the outer diameter thereof reducing toward the distal end of the branch tube.

Abstract: A lightweight gas spring with a volume compensator, which is incorporated into a fork leg of a two-wheel vehicle fork. The fork leg includes a housing having an upper inner telescoping hollow rod with a closed top and bottom end which is partially inserted into a lower outer telescoping rod having a closed bottom end. The inner upper telescoping rod inside includes a stationary volume compensator, a reciprocating piston, a first expandable and contractible gas chamber between the volume compensator and the piston which functions as a positive gas spring, and a second expandable and contractible gas chamber between the piston and the bottom end which can function as a negative gas spring, an air bypass channel which is longitudinally positioned on the inner surface of the inner telescoping rod may open to the first and second gas chamber.