EP2571749A1

EP2571749A1 - Spring fork

Info

Publication number: EP2571749A1
Application number: EP11722367A
Authority: EP
Inventors: Dirk LÜDE; Bernd Nenning
Original assignee: Gustav Magenwirth GmbH and Co KG
Current assignee: Gustav Magenwirth GmbH and Co KG
Priority date: 2010-05-19
Filing date: 2011-05-18
Publication date: 2013-03-27
Also published as: WO2011144667A1; TW201206753A; US20140191491A1; DE102010021076A1; DE102010021076A8

Abstract

The invention relates to a spring fork (1) with at least one positive chamber (31), at least one negative chamber (32) and a setting device (40) for setting the length of the spring fork (1), wherein the setting device (40) comprises a valve device (50), which is arranged between the at least one positive chamber (31) and the at least one negative chamber (32), and an actuating device (60), characterized in that the actuating device (60) has at least a first position for setting a small length of the spring fork (1) (lowered spring fork) and at least one second position for setting a large length of the spring fork (1) (extended spring fork).

Description

fork

The invention relates to a suspension fork according to the preamble of claim 1.

Such a suspension fork is known for example from DE 199 53 901 C2. The fork disclosed there has a spring device with a positive chamber and a

Negative chamber on. Between the positive chamber and the

Negative chamber is provided a connection path which can be closed with a shut-off device. To fill the two chambers, one chamber is filled via a filling opening and the other chamber via the connecting path with compressed air or compressed gas. After filling and adjusting the spring device, the filling opening and the

Connection way closed. In order to adjust the spring device and in particular the length of the suspension fork, the shut-off device can be opened when the filling opening is closed and the adjustment can be made. For example, a Hubabsenkung by pushing together the

Suspension fork or a Hubanhebung done by pulling the suspension fork. After the adjustment, the shut-off device is closed.

The well-known fork has the disadvantage that the adjustment of the fork is expensive and the adjustment of the length of Fork not easy. In particular, there is the difficulty that for lowering the suspension fork the

Actuator must be constantly pressed while the fork is lowered. Once the desired lowering of the suspension fork is done, the actuator can be released again. Likewise, to extend the suspension fork, the actuator must be constantly pressed and the fork simultaneously relieved. As soon as the

desired increase of the suspension fork is done, the actuator can be released again.

The invention is therefore based on the object, a

Specify suspension fork, in which the Hubabsenkung can be easily adjusted, and has a simple structure.

The object of the invention is achieved with a suspension fork according to the features of claim 1 and according to the features of one of the independent claims. advantageous

Embodiments of the invention are in the dependent

Claims specified.

According to the invention, a fork with at least one positive chamber, at least one negative chamber and a

Specified adjusting means for adjusting the length of the fork, said adjusting means comprises a valve means which is arranged between the at least one positive chamber and the at least one negative chamber, and an actuating device, wherein the

Actuator at least a first position for adjusting a small length of the fork (lowered fork) and at least one second position to

Setting a large length of the fork (extended fork) has.

The suspension fork according to the invention has the advantage that in the setting of the actuator in the first Position the fork when loaded in

Automatically lowers suspension direction, and that when adjusting the actuator in the second

Position the fork automatically extends.

According to the invention, the actuating device a

Locking device for locking the actuator in the or a first position and the or a second position.

According to the invention, the actuating device a

Having locking device for locking the actuator in the first position and the second position.

According to the invention, a fork is also provided with at least one positive chamber, at least one negative chamber and an adjusting device for adjusting the length of the suspension fork, wherein the adjusting device comprises a valve device which is arranged between the at least one positive chamber and the at least one negative chamber, and an actuating device wherein the actuating device has a locking device for locking the actuating device in the or a first position and the or a second position.

According to the invention, the adjusting device can have at least two connecting paths for connecting the positive chamber to the negative chamber.

According to the invention is also a fork with at least one positive chamber, at least one negative chamber and an adjusting device for adjusting the length of the fork wherein the adjusting device comprises a valve device, which is arranged between the at least one positive chamber and the at least one negative chamber, and an actuating device, wherein the adjusting device has at least two connecting paths for connecting the positive chamber to the negative chamber.

According to the invention, the adjusting device can be so

be formed and arranged that for setting a small length of the fork (lowered fork), the positive chamber is connected to the negative chamber via one of the at least two communication paths, and to set a large length of the fork (extended fork) the positive chamber with the negative chamber via a another of the at least two connection paths is connected.

According to the invention, the adjusting device can have an adjusting piston which is designed such that it releases the one connecting path in the or a first position of the actuating device and releases the other connecting path in the or a second position of the actuating device. In this case, the adjusting piston can be arranged displaceably in a cylinder, which is the at least two

Connection paths between the positive chamber and the

Negative chamber at least partially defined.

According to the invention, the valve device may comprise at least one check valve.

According to the invention, the valve device can have at least two check valves. Preferably, the two check valves may be arranged in a chamber through which more preferably at least one communication path extends from the positive chamber to the negative chamber. In these embodiments of the invention, the two

Check valves valve closure members such as balls, which by a spring means in preferably opposite directions are biased. For example, a spring between two balls

be arranged, which biases the two balls in corresponding valve seats.

According to the invention, a fork is also provided with at least one positive chamber, at least one negative chamber and an adjusting device for adjusting the length of the suspension fork, wherein the adjusting device comprises a valve device which is arranged between the at least one positive chamber and the at least one negative chamber, and an actuating device wherein the valve means comprises at least two check valves.

In the embodiments of the invention with the at least two connection paths can in each of the at least two

Connection paths between the positive chamber and the

Negative chamber in each case at least one check valve

be arranged. The at least two can

Check valves are formed and arranged such that at least one check valve, a flow of the

Positive chamber in the negative chamber through his

Non-return function locks, and that at least one

Check valve blocks a flow from the negative chamber into the positive chamber by its non-return function.

According to the invention, at least one connecting path can be arranged between the positive chamber and the negative chamber, and the valve device can be designed and arranged such that in the first position

Actuating the valve device the

Release communication path in a first direction and locks in the direction opposite to the first direction, and that in the second position of the actuator, the valve device releases the communication path in the direction opposite to the first direction and locks in the first direction. According to the invention, a suspension fork is also provided with at least one positive chamber, at least one negative chamber and an adjusting device for adjusting the length of the suspension fork, wherein the adjusting device comprises a valve device which is arranged between the at least one positive chamber and the at least one negative chamber, and an actuating device wherein at least one communication path is arranged between the positive chamber and the negative chamber, and the valve device is designed and arranged such that in the first position

Actuating the valve device the

Release communication path in a first direction and locks in the direction opposite to the first direction, and that in the second position of the actuator, the valve device releases the communication path in the direction opposite to the first direction and locks in the first direction.

In this case, the adjusting device may have an adjusting piston, which is designed such that it in the or a first position of the actuating device

at least one connection path in the first direction releases and locks in the direction opposite to the first direction, and in the or a second position of the actuator releases the at least one connection path in the direction opposite to the first direction and locks in the first direction. In this case, the adjusting piston can be arranged displaceably in a cylinder which at least partially defines the at least one connecting path between the positive chamber and the negative chamber. In this case, a check valve may be formed and arranged in the at least one connection path. In this case, the effective direction of the check valve by the

Actuator be reversed. For example, the check valve in the adjusting piston substantially perpendicular or perpendicular to the main axis of the adjusting piston be arranged and reversed by the actuation of the actuator with the defined in the adjusting at least one communication path between the positive chamber and the negative chamber.

According to the invention, the suspension fork can have an intermediate chamber which is fluidly arranged between the positive chamber and the negative chamber, at least one between the negative chamber and the intermediate chamber

A communication path is arranged, in which a valve device is designed and arranged such that a flow from the negative chamber is locked in the intermediate chamber, while a flow from the intermediate chamber into the

Negative chamber is allowed.

According to the invention, a fork is also provided with at least one positive chamber, at least one negative chamber and an adjusting device for adjusting the length of the suspension fork, wherein the adjusting device comprises a valve device which is arranged between the at least one positive chamber and the at least one negative chamber, and an actuating device wherein the suspension fork has an intermediate chamber, which is arranged fluidically between the positive chamber and the negative chamber, wherein between the negative chamber and the intermediate chamber at least one connection path is arranged, in which a

Valve device is designed and arranged such that a flow from the negative chamber into the

Intermediate chamber is blocked, while a flow from the intermediate chamber is allowed in the negative chamber.

According to the invention can from a certain reduction of

Suspension fork, the connection between the negative chamber and the intermediate chamber exclusively via the connection path, which has the valve device. In this case, the valve device may comprise a check valve which blocks a flow in the intermediate chamber. According to the invention, the actuating device a

Remote control have.

The remote control can be a radio remote control.

According to the invention, the actuating device or the remote control may have a lever.

In the embodiments of the invention with a remote control, the remote control may have the or a locking device for locking the remote control in a first position and a second position.

According to the invention, the adjusting device can have at least one further position in which the length of the suspension fork is adjustable, and at least one blocking position in which the adjustability of the length of the suspension fork is blocked.

According to the invention, the fork can be a pneumatic

Be suspension fork, which preferably comprises a pneumatic suspension.

The invention will be described in more detail below with reference to the exemplary embodiments shown in the figures.

Fig. 1 shows a side sectional view of a fork according to an embodiment of the invention along the line I-I of Fig. 2, wherein the adjusting device in a first position for adjusting the

Fork is shown in an extended position.

FIG. 2 shows a front view of the suspension fork of FIG. 1. FIG.

Fig. 3 shows an enlarged detail of the through the

Circle III defined area of FIG. 1. shows a detail of FIG. 3 corresponding detail view of the fork of FIG. 1, wherein the

Adjusting device is shown in a second position for adjusting the suspension fork in a lowered or retracted position. shows an enlarged detail view of the area defined by the circle V of FIG. 1. FIG. 5 shows a detailed view corresponding to FIG. 5 of the fork of FIG. 1, wherein the suspension fork is shown in a further lowered or retracted position. shows a schematic view of an alternative adjustment device in a first position for adjusting the suspension fork in an extended position. shows a corresponding to FIG. 6 view of the adjusting device of Fig. 6 in a second position for adjusting the suspension fork in a lowered or retracted position. shows a schematic view of an alternative adjustment device in a first position for adjusting the suspension fork in an extended position.

FIG. 9 shows a view corresponding to FIG. 8

Einsteileinrichtung of Fig. 8 in a second position for adjusting the suspension fork in a lowered or retracted position.

Fig. 10 shows a schematic view of an alternative

Adjustment device in a first position to Adjust the suspension fork in an extended position.

FIG. 11 shows a view corresponding to FIG. 10

Einsteileinrichtung of Fig. 10 in a second position for adjusting the suspension fork in a lowered or retracted position.

In the present description, the following reference numerals are used:

1 suspension fork

2 spring device

3 damper device

4 fork bridge

5 stabilizer

6 thru axle

7 filling valve

8 main pistons

9 piston rod

10 standpipe

20 sliding tube

30 spring device

31 positive chamber

32 negative chamber

33 intermediate chamber

34 seal

35 check valve

36 Connection path (between negative chamber and

Intermediate chamber)

40 adjustment device

140 adjustment device

240 adjustment device

340 adjustment device

41 cylinders

141 cylinders

141 cylinders cylinder

Connection to positive chamber

Connection to intermediate or negative chamber

Connection to positive chamber

Connection to intermediate or negative chamber

Connection to positive chamber

Connection to intermediate or negative chamber

connecting bore

valve means

Venti1einrichtung

valve means

check valve

Rückschlagventi1

check valve

Bullet

valve seat

feather

actuator

actuating button

adjusting piston

poetry

Connection hole (to the positive chamber 31)

Connecting bore (to the intermediate chamber 33)

connecting

connecting 90 connection path

Figures 1 to 5 show a fork according to a first embodiment of the invention.

The suspension fork 1 has a spring device 2 and a

Damper device 3, which are connected to each other via a fork bridge 4, a front stabilizer 5 and a rear stabilizer 5. At the dropout of the suspension fork a thru axle 6 is provided for receiving a front wheel, not shown, of a bicycle, not shown.

The spring device 2 and the damper device 3 each have a fixed to the fork bridge 4 connected standpipe 10 and relative thereto telescopically sliding slide tube 20.

It is clear that the invention is not limited to the illustrated construction of the fork. For example, the suspension fork can also be formed with sliding tubes immersed in uprights or less or more or none

Have stabilizers.

In the spring device 2, a spring device 30 having a positive chamber 31, a negative chamber 32 and an intermediate chamber 33 is provided. In the sliding tube 20, a main piston 8 is provided, which on a piston rod. 9

is arranged. During compression of the suspension fork 1, the main piston 8 moves into the standpipe 10, whereby the pressure in the positive chamber 31 rises and falls in the intermediate chamber 33 and the negative chamber 32.

During compression of the suspension fork from the initial position (ie, after the driver's sitting on the bike with the suspension fork adjusting equilibrium position), the air or gas is compressed in the positive chamber 31, so that a spring action with a progressive spring characteristic. The pressure in the positive chamber 31 should at the

The basic setting (i.e., the pre-ride adjustment of the spring characteristic of the suspension fork) may be selected substantially in response to the driver's weight acting on the suspension fork.

When rebounding the suspension fork from the home position, the air or the gas is compressed in the negative chamber 32, so that a spring action takes place with a progressive spring characteristic. The pressure in the negative chamber 32 should be selected in the basic setting substantially in response to the desired responsiveness of the suspension fork.

As best seen in Figures 3 and 4, the valve means 50 includes a check valve 51 and a

Check valve 52 which in the communication path 80 and Verbindungsweg 90 between the positive chamber 31 and the

Negative chamber 32 are formed.

The check valve 51 has a ball 53 and a

Valve seat 55 on. The check valve 52 has a ball 54 and a valve seat 56. Between the two balls 53, 54, a spring 57 is arranged, which biases the two balls 53, 54 in the corresponding valve seats 55 and 56, respectively.

According to alternative embodiments of the invention, one of the two balls 53, 54 or both balls 53, 54 may be biased into their valve seats by other means known to those skilled in the art. For example, instead of one spring 57, two springs may be provided. Accordingly, for example, one or two clips could be provided.

Alternatively or additionally, the balls could also be arranged on screens and / or sponges or floating. Both balls could also be placed up or down if the connection line structure is adjusted accordingly. According to alternative embodiments of the invention, instead of a ball 53, 54 or instead of both balls 53, 54, other valve closing members known to the person skilled in the art, in particular for non-return valves, may be provided,

for example, cones, cylinders, plates, etc.

In a cylinder 41 of the adjusting device 40 is a

Adjusting piston 70 slidably disposed, the

Valve device 50 includes. On the adjusting piston 70, a seal 71 and a seal 72 are arranged such that the space 57 receiving the spring 57 between the balls 53 and 54 in an upper position (see Fig. 3) via a bore in the adjusting piston 70 with the positive chamber 31 and in a lower position (FIG. 4) via the same or a different bore 74 in the adjusting piston 70 with the

Intermediate chamber 33 (or in versions that no

Intermediate chamber contained with the negative chamber) is connected.

The intermediate chamber 33 communicates with the negative chamber 32 via a valve assembly shown in detail in FIG

Connection .

The actuating device 60 has an actuating button 61, with which the actuating device 60 in a first defined and a second defined position the

Adjusting device adjusted such that the adjusting piston 70 in the upper position (Fig. 3) and lower position (Fig. 4) is arranged.

In the position of Fig. 3, the suspension fork 1 is in the extended position, or remains the suspension fork 1 in the extended position. The adjusting piston 70 is arranged in such a way in the cylinder 41, that the intermediate space, which receives the spring 57, is connected to the positive chamber 31 via a bore in the adjusting piston 70.

Is the suspension fork in the extended position, prevents the check valve 52, that of the rising in the positive chamber 31 during compression in the pressure

Intermediate chamber 33 and thus enters the negative chamber 32. When driving occurring shocks are cushioned in the extended position of the suspension fork 1. The suspension fork 1 remains in the extended position.

If the suspension fork is in the lowered position, the pressure in the negative chamber 32 and the intermediate chamber 33 increases during rebound, which then via the check valve 52 and the connecting path 90 into the intermediate space which receives the spring 57 and the bore in the adjusting piston can escape into the positive chamber 31, which has a lower pressure. This is done until the fork is in the extended position.

In the position of Fig. 4, the suspension fork 1 is in the lowered position, or remains the suspension fork in the lowered position. The adjusting piston 70 is arranged in such a way in the cylinder 41, that the intermediate space, which receives the spring 57, is connected to the intermediate chamber 33 and thus to the negative chamber 32 via a bore 74 in the adjusting piston 70.

The spring fork is in the lowered position, prevents the check valve 51, that in the

Negative chamber 32 and thus the rising in the intermediate chamber 33 during rebound pressure in the positive chamber 31 passes. When driving occurring shocks are cushioned in the lowered or retracted position of the suspension fork 1. The

Fork 1 remains in the lowered position.

When the suspension fork 1 is in the extended position, upon compression the pressure in the positive chamber 31 rises, which via the connecting path 80 and the check valve 51 into the intermediate space which receives the spring 57, and then via the bore 74 in the adjusting piston 70 in the intermediate chamber 33 and thus can escape into the negative chamber 32, which has a lower pressure. This is done until the fork 1 is in the lowered position.

Optionally, the suspension fork on a safety suspension, which ensures that the fork does not strike at full deflection, especially in the lowered or retracted position. For this purpose, a mechanical spring, such as an elastomer can be provided at the end of the strut. The preferred solution is a suspension according to the disclosed in DE 10 2006 010 245 AI, the entire disclosure of which is incorporated by reference in the present disclosure, disclosed fork.

Fig. 5 shows the corresponding design of the piston rod. In the piston rod 8 connecting bores 45 and 46 are provided. In a connection path 36 between the

Negative chamber 32 and the intermediate chamber 33 is a

Check valve 35 is provided, which is arranged and designed such that a flow from the negative chamber 32 into the intermediate chamber 33 is blocked when the negative chamber

32 is connected to the intermediate chamber 33 only via the connection path 36. Passing through the connecting holes 45, the seal 34, a volume exchange of the intermediate chamber

33 take place in the negative chamber 32 only via the check valve 35. The check valve 35 then prevents flow from the negative chamber 32 in the intermediate chamber 33, so as to ensure that from a certain lowering of the fork (when the connecting holes 45 pass over the seal 34), the pressure in the negative chamber 32 is not affected by a flow in the intermediate chamber 33 can decrease. As a result, a spring action of the negative chamber 32 is ensured and a mechanical stop avoided.

In the Fig. 5 shown in Fig. 5A corresponding

Detail view of the suspension fork of Fig. 1 is the suspension fork in a further lowered or retracted position shown. The connection bore 45 is still above the seal 34, so that a connection between the

Intermediate chamber and the negative chamber 32 is made. The

Connecting holes 46 have the seal 34 already

run over. As soon as the connecting holes 45 the

Pass over seal 34, there is no direct connection between the intermediate chamber 33 and the negative chamber 32, but only a connection via the check valve 35, so that a further lowering of the fork is no longer possible and as described above, a mechanical stop is avoided by the residual spring travel ,

Figures 6 to 11 show variants of an alternative

Einsteileinrichtung for a suspension fork, which in a

lowered position and an extended position can be adjusted. For the description of the parts not shown in the figures, reference is made to the description of

Embodiment, which is shown in Figures 1 to 5, and the expertise directed. The reference numbers themselves

corresponding parts are increased by 100 or a multiple of 100.

In the alternative adjusting device 140 shown in FIGS. 6 and 7, an adjusting piston 170 is rotatably arranged in a cylinder 141 about its main axis. In the adjusting piston 170, a communication path 180 is formed, in which a valve device 150 is arranged with a check valve 151, which may have, for example, a biased into a valve seat with, for example, a spring ball. Alternative check valves known to those skilled in the art may also be provided. In the cylinder 170 are a connection 143 to a positive chamber, not shown, and a connection 144 to a non-illustrated

Provided intermediate chamber or negative chamber.

In the position of the adjusting device 140 shown in FIG. 6, the connecting path 180 connects the connection 143 and the connection 144 such that a flow is blocked by the check valve from the positive chamber into the intermediate chamber or negative chamber and a flow from the

Negative chamber or intermediate chamber in the positive chamber is possible. As a result, the fork is moved to the extended position or remains in the extended position.

In the position of the adjusting device 140 shown in FIG. 7, the connecting path 180 also connects the connection 143 to the connection 144, wherein the adjusting piston 170 is in a position which is rotated by 180 degrees with respect to the position shown in FIG. This is the result

Reverse direction of the check valve 151 reversed, so that by the check valve, a flow from the negative chamber or intermediate chamber is blocked in the positive chamber and a flow from the positive chamber into the intermediate chamber or negative chamber is possible. As a result, the suspension fork is moved into the lowered or retracted position or remains in the lowered or retracted position.

FIGS. 8 and 9 show a variant of the alternative adjustment device 150 shown schematically in FIGS. 6 and 7, to the description of which reference is made. In the following, only the differences are described, where

corresponding parts with the same but increased by 100

Reference signs are designated.

In the variant shown in FIGS. 8 and 9, the cylinder 140 has in each case two connections 143 and 144, respectively, which are arranged in such a way that the reverse direction of the check valve 252 is reversed with a rotation of 90 degrees.

FIGS. 10 and 11 show a variant of the alternative shown schematically in FIGS. 6 and 7 or 8 and 9

Adjustment device 150 or 250, reference is made to the description. The following are just the differences described, wherein corresponding parts are referred to with the same but increased by 100 or 200 reference numerals.

In the variant shown in FIGS. 10 and 11, the cylinder 240 has in each case two connections 243 and 244 which are arranged in such a way that a reversal of the blocking direction of the check valve 252 takes place with a rotation of 45 degrees.

Other angles can be chosen appropriately. Preferably, the angle is 20 to 160 degrees, more preferably 30 to 140 degrees, more preferably 40 to 120 degrees. at

Versions with mechanical remote control are preferable to smaller angles, for example 90 degrees.

It is clear that in the embodiments shown in Figures 6 to 11 in addition to the rotation of the adjusting piston 170, 270 and 270, an axial adjustment can be made. In this case, the connections 243, 244 and 343, 344 must be at different levels or in the execution of the

Figures 6 and 7 in the axial direction longer connections 143 and 144 are provided. Alternatively, multiple connections 143 and 144 may be provided.

The suspension fork may have a remote control for actuating the actuator 60. The remote control can for example have a lever with a Bowden cable. Furthermore, a return spring may be provided, whose

Restoring force is selected such that a first provided in the remote control threshold is not overcome by the spring force. This has the advantage that override the threshold by pressing the remote control and the

Actuator can be moved to another position. Optionally, at least one additional threshold can be provided in the actuating device. The power of

Return spring should then be large enough to ensure that the threshold is passed over, thus with the remote control different positions can be adjusted. Is the force of the return spring is not sufficient to overrun the threshold in the actuator, can with the

Remote control at least one position can be set, which can be achieved against the spring force. The other position can then be set on the actuator. Alternatively or additionally, the remote control may also have a radio control. Such radio controls are known in the art.

Claims

claims

1. suspension fork with at least one positive chamber, at least one negative chamber and an adjusting device for adjusting the length of the suspension fork, wherein the

Einsteileinrichtung a valve device, the

between the at least one positive chamber and the at least one negative chamber, and an actuating device, characterized in that the actuating device at least a first position for adjusting a small length of the fork (lowered fork) and at least a second position for adjusting a large length of Fork (extended

Suspension fork).

2. Fork according to claim 1 or the preamble of

Claim 1, characterized in that the

Actuating a locking device for locking the actuator in the or

a first position and the second or a second

Position has.

3. Suspension fork according to one of the preceding claims or the preamble of claim 1, characterized in that the adjusting device at least two

Having connection paths for connecting the positive chamber with the negative chamber.

4. suspension fork according to claim 3, characterized in that the adjusting device is designed and arranged such that to set a small length of the fork (lowered fork) the

Positive chamber is connected to the negative chamber via one of the at least two communication paths, and to Adjustment of a large length of the suspension fork

(Extended fork) the positive chamber is connected to the negative chamber via another of the at least two communication paths.

Suspension fork according to one of claims 3 to 4, characterized in that the adjusting device has an adjusting piston which is designed such that it in the or a first position of the

Actuator the one connection path

releases and releases in the or a second position of the actuator the other connection path.

A suspension fork according to claim 5, characterized in that the adjusting piston is displaceably arranged in a cylinder which at least partially defines the at least two communication paths between the positive chamber and the negative chamber.

Suspension fork according to one of the preceding claims or the preamble of claim 1, characterized in that the valve device at least two

Has check valves.

Suspension fork according to the preceding claim, characterized in that the at least two

Check valves are arranged in a chamber through which preferably extends at least one communication path from the positive chamber to the negative chamber.

Suspension fork according to claim 7 or 8, characterized

characterized in that the at least two

Check valves valve closure members, which by a spring means in preferably

opposite directions are biased.

10. Suspension fork according to claim 9, characterized in that the spring device between the

Valve closing members of the at least two

Check valves is arranged and the

Valve closure members of at least two

Check valves in the respective valve seats biases the at least two check valves.

11. Suspension fork according to one of claims 7 to 10 in

Dependence of one of claims 3 to 6, characterized in that in each of the at least two connecting paths between the positive chamber and the negative chamber in each case at least one check valve is arranged.

12. Suspension fork according to one of claims 7 to 11, characterized in that the at least two check valves are formed and arranged such that at least one check valve blocks a flow from the positive chamber into the negative chamber by its non-return function, and that at least one check valve, a flow of the negative chamber in the positive chamber by its non-return function locks.

13. Suspension fork according to one of the preceding claims or the preamble of claim 1, characterized in that between the positive chamber and the negative chamber at least one connection path is arranged, and that the valve device is designed and arranged such that in the first position of the actuating device, the valve device releases the communication path in a first direction and locks in the direction opposite to the first direction, and that in the second position of the actuator, the valve device releases the communication path in the direction opposite to the first direction and locks in the first direction.

14. Suspension fork according to one of the preceding claims or the preamble of claim 1, wherein the suspension fork has an intermediate chamber, which is fluidically arranged between the positive chamber and the negative chamber, characterized in that between the negative chamber and the intermediate chamber at least one connection path is arranged in the one

Valve means is designed and arranged such that a flow from the negative chamber is locked in the intermediate chamber, while a flow is allowed from the intermediate chamber into the negative chamber.

15. Suspension fork according to one of the preceding claims, characterized in that the actuating device has a remote control.

16. Suspension fork according to claim 15, characterized in that the remote control lever and / or a

Radio remote control includes.

17. Fork according to 15 or 16, characterized in that the remote control or a

Locking device for locking the

Remote control in a first position and a second position.

18. Suspension fork according to one of the preceding claims, characterized in that the adjusting device at least one further position in which the length of the suspension fork is adjustable, and at least one

Has blocking position in which the adjustability of the length of the fork is locked.