Abstract: A telescopic leg forming part of a front fork comprises displaceably arranged outer and inner parts (3, 4). Within the leg parts there is disposed a first chamber (10) for liquid and gas medium (12), together with a control and sealing arrangement between the leg parts, in which a second chamber (21) between a first end of a control element and a sealing element (19) is intended to accommodate some of the liquid medium (12a). The second chamber is provided with or connected to a medium supply arrangement which, irrespective of the mutual positions and movements of the outer and inner leg parts, ensures a supply of medium from a third chamber (22), disposed between the leg parts and at the second end of the control element, to the second chamber. The supply of medium substantially counteracts pressure reduction in the second chamber and ensures maintenance of the said lubrication function.

Abstract: A telescopic fork leg with damping system comprising piston and piston rod arrangements. The said 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 vehicle (1) in the form of a motorcycle comprises a support wheel system located between the front and rear wheels (3, 4) of the motorcycle. The front wheel is arranged in a wheel suspension (5), in or with which the front wheel can, depending on steering actions with steering means (7), be turned into different desired turning steering positions. In the longitudinal section plane of the vehicle in the vertical direction, there is a projection (a) at the front wheel on account of the said suspension.

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: An arrangement with or in the form of a gas spring, comprising a first and second gas chamber with one or more devices separating these, which devices are arranged to increase the volume of the first chamber and reduce the volume of the second chamber, or vice versa, when a difference in pressure arises in the chamber. The invention also relates to a method for determining the spring characteristics of a gas spring, with the spring characteristics being created only by a first device, by means of which the space in the gas cylinder is divided into a first gas chamber and a second gas chamber, or in combination with a second device which is arranged in an additional chamber, which is divided by the second device into a third chamber and a fourth chamber that are connected to the first chamber and the second chamber respectively.

Abstract: A telescopic fork leg incorporates mutually displaceable inner and outer tube parts and a damping arrangement for damping the relative movements of the tube parts. The damping arrangement comprises tubular and coaxially disposed units. A piston belonging to the first outer tube part operates in a chamber within the interior of the tubular units in a medium present in the chamber, which medium, at a piston speed above a chosen value, is transferred between the top and bottom sides of the piston via passage(s) disposed in, on or by the piston and damping-influencing members, for example in the form of shims.

Abstract: A gas-filled spring (1) operates using gas (13, 14) and may be intended for a motor cycle. The gas-filled spring comprises a cylinder (2) and a piston (4), said cylinder comprising a compression chamber and a return chamber (8, 9). An arrangement maintains the necessary quantities of gas and gas pressure settings or differential pressures in the chambers despite any gas leakage and temperature variations occurring. Arranged between the chambers is a passage (12), which is open only in a predetermined position of the cylinder and the piston relative to one another. In the open position gas transfer between the chambers and/or pressure equalization in or differential pressure adjustment of the gas pressures in the chambers are permitted. The invention also relates to a valve for counteracting rapid changes in leakage and temperature. The desired spring characteristic of the gas-filled spring can in this way be maintained despite leakage and temperature variations.

Abstract: An arrangement forms part of a shock absorber (1) and is intended to produce distinct longitudinal displacements of an element (7) in response to longitudinal displacements of a screw (15). The displacement directions of the screw and the element diverge and the displacement of the element is designed to occur against the action of a force (14) on the element. The screw is designed with a tapered or inclined surface (17) and the element, or a part related thereto, is pressed against the surface by the said force (14). Interacting sections of the surface and the element, or the part, are designed with structures that produce the said distinct longitudinal displacement positions of the element when acted upon by the member. In this way the element actuation function and that of producing the distinct positions can be incorporated into a relatively simple and compact construction.

Abstract: A vane damper, and a method for making the vane damper is disclosed. A casing including a space for at least one rotable vane divides the space into two parts. The spaces are variable because of the vane which rotates within the space. Further, a number of asymmetrical ducts connects the spaces separated by the vane with a gas accumulator space so that a medium within the spaces for damping motion of the vane can expand into the gas accumulator space against the force of a gas. The vane is produced by extruding aluminum or an aluminum containing alloy. The vane is sealed against the surfaces of the space as well as a bearing member supporting the vane.

Abstract: A shock absorber is made with a bleed function and preferably a non-return valve function associated with the bleed function. The shock absorber has a cylinder (3) and, working in the latter in working medium and arranged on a piston rod (4), a piston arrangement. The latter comprises at least two first and second pistons (5, 6) arranged at a distance from one another on the piston rod. At least one piston (5) can, in connection with an end position, be introduced into a first space so as, depending on its position in or at the space, to bring about a modified or varied damping force relative to when the piston is located outside the space. The piston rod (4) is provided with an inner second space (15) which is arranged so as to contain said bleed and/or non-return valve function. Additionally or alternatively, the piston (6) working outside the first space is provided with a member performing a bleed function and with any associated non-return valve function.

Abstract: In a front wheel suspension on a motorcycle, the front wheel is mounted in rearward-sloping supporting members which, in turn, are mounted on the chassis of the vehicle by bearing units comprising link elements and a springing function. The supporting member and the wheel are turnable about a steering line which slopes in a corresponding manner to the supporting members. The bearing units form separate upper and lower bearing units, which are provided with bearing units in or about which the supporting members and the wheel are turnable. Preferably, the upper bearing unit of the bearing units acts as a combined bearing and steering linkage member for the supporting members. The bearing units are torsionally rigid in their respective planes, which extend through the respective securement points or bearings of the bearing units in the chassis and the supporting members.

Abstract: A device, e.g. a pressure regulator, for realizing an opening and/or closing function in connection with the force-velocity curves of the device incorporates two parts which work away from and towards each other at different velocities and accelerations, e.g. slide and housing. The parts work with a stroke and determine, in dependence upon the present size of the stroke, the passage of a fluid by way of a restrictor function realized by the parts. At least the one part (the slide) is subjected to force on both its sides. The restrictor function is made up of at least two part-restrictors which can be simultaneously actuated by a respective stroke and thereupon vary, preferably successively, their restrictor sizes differently from each other in dependence upon the respective stroke size. In the restrictor function, a passage of fluid is herein obtained which produces a smooth curve shape in the introductory and concluding part of the respective opening or closing function.

Abstract: A method of producing a vane damper comprising a body including a space for at least one rotatable vane that divides the space into two part spaces that are located on either side of the vane. The spaces are variable because of the rotatability of the vane. The vane is mounted in the body by a bearing member and operates in a working medium that is located in the space. The working medium is transferable between the variable spaces via a passage or at least one throttle function to produce damping. The method includes producing the vane with associated bearing member by extruding aluminum or aluminum-containing alloy. The extruded product is cut for production of the respective vane with associated bearing member. The vane is provided with sealing members for establishing a seal against surfaces of the space and of the bearing member.

Abstract: A number of embodiments of hydraulic shock absorbers, including a damping arrangement that includes a cavity and an elastomeric member received in the cavity which cooperates with the fluid chamber so as to permit small degrees of relatively undamped fluid flow to improve road holding.

Abstract: A shock absorber has a cylinder with a piston and piston rod arrangement in the cylinder. Working medium can be guided in different flow paths via shim stacks for the purpose of obtaining different dampings based on the position of the piston. The piston arrangement can have a piston supporting shim stacks. One or more further shim stacks are arranged in a unit which is separate from the cylinder. In at least one of the shock absorber strokes, the working medium can be conveyed via the shim stack(s) in the unit separate from the cylinder.

Abstract: A shock absorber has an arrangement for bringing about different kinds of damping characteristics, in response to external controls and independently of how the piston speed varies. The shock absorber comprises a piston which works in a cylinder (2) and which has a passage between upper and lower sides (1a, 1b) of the piston. The changes in the damping characteristics are obtained by a restriction in a channel through which a shock absorber medium or fluid flows. A first valve element (7) exerts an influence on the restriction in response to a first pressure which is created by a pilot flow running between the upper and lower sides at the piston. The pilot flow is determined by a second valve element (8) which is controllable by electrical control signal.

Abstract: A shock-absorber includes a cylinder and a piston arranged within the cylinder and provided with at least one passageway of variable area for controlling flow of a working fluid from one side of the piston to the other side thereof. A controllable device is incorporated within the piston and continuously controlled by external control signals from a control unit to vary the area of the passageway. The external control signals are supplied by the control unit in response to input signals received from sensors which are associated with the shock-absorber. The input signals are related to the instantaneous parameter information obtained from the piston. The value of the external control signals varies during the stroke of the piston at least in part as a function of the input signals.

Abstract: A suspension in a motorcycle or similar vehicle having a frame relative to which a rear fork with a rear wheel is moveable. The suspension is characterized by an elongated composite spring mounted at the front end on the lower front part of the frame and loaded at the rear end by one end of a link member the other end of which is mounted on the rear fork. The frame is provided on its underside with at least one deflecting member which is arranged in such a manner that it bears against the composite spring upon a relative low loading of the rear fork relative to the frame to change the spring rate.