WO2002055819A1 - Telescopic spring unit having a locking device - Google Patents

Telescopic spring unit having a locking device Download PDF

Info

Publication number
WO2002055819A1
WO2002055819A1 PCT/DK2002/000023 DK0200023W WO02055819A1 WO 2002055819 A1 WO2002055819 A1 WO 2002055819A1 DK 0200023 W DK0200023 W DK 0200023W WO 02055819 A1 WO02055819 A1 WO 02055819A1
Authority
WO
WIPO (PCT)
Prior art keywords
locking device
cylinder
piston rod
plug
stop means
Prior art date
Application number
PCT/DK2002/000023
Other languages
French (fr)
Inventor
Bent Kirk Jensen
Original Assignee
Vkr Holding A/S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vkr Holding A/S filed Critical Vkr Holding A/S
Priority to DE10295692.8T priority Critical patent/DE10295692B3/en
Priority to PL365250A priority patent/PL203465B1/en
Publication of WO2002055819A1 publication Critical patent/WO2002055819A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
    • E05F1/08—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings
    • E05F1/10—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance
    • E05F1/1091—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance with a gas spring
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C17/00—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith
    • E05C17/02—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith by mechanical means
    • E05C17/04—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith by mechanical means with a movable bar or equivalent member extending between frame and wing
    • E05C17/30—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith by mechanical means with a movable bar or equivalent member extending between frame and wing of extensible, e.g. telescopic, construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/0209—Telescopic
    • F16F9/0245—Means for adjusting the length of, or for locking, the spring or dampers
    • F16F9/0254—Means for adjusting the length of, or for locking, the spring or dampers mechanically lockable, e.g. by use of friction collar
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/45—Stops limiting travel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/46—Means for locking the suspension
    • B60G2204/4604—Means for locking the suspension mechanically, e.g. using a hook as anticreep mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/90—Maintenance
    • B60G2206/92—Tools or equipment used for assembling

Definitions

  • Telescopic spring unit having a locking device.
  • the present invention relates to a telescopic assembly
  • a spring unit preferably a gas spring, arranged in a cylinder, a piston rod being connected at one end to said spring unit and having a free end projecting out of the cylinder at one end thereof, and a locking device having a first end connected to said free end and a second end slidably riding on said cylinder, said locking device having stop means positioned at least at or near its second end, said second end being positioned at or near said one end of the cylinder in an extended position of the assembly and force means urging said stop means against said one end of the cylinder.
  • Gas springs are widely used to apply a force on a body, e.g. to open a hatch, a door or a window.
  • a body e.g. to open a hatch, a door or a window.
  • the hatch, door or window is in a fully open position, and the gas spring is fully extended, it may be desirable, or necessary, to engage a locking device to prevent accidential closing.
  • a roof window which may be used as an exit for craftsmen or builders to gain access to the roof. Of safety reasons it is necessary that the roof window will stay in the open position, so the craftsmen will be able to return to the inside of the building.
  • gas springs with locking devices for locking the piston rod in its fully ex- tended position is known in the art.
  • One such gas spring manufactured by Arvin Control Motion has a plate spring acting on the inside of the locking device and arranged in a plug firmly connected to the free end of the piston rod and pivotably connected to the locking device.
  • US Patent No. 4,596,383 discloses a telescopic assembly comprising a gas spring with a lock tube adapted to ride telescopingly over the gas spring.
  • the gas spring is provided with an additional overex- tension spring means and the gas spring must be over- extended to engage the lock tube.
  • Another additional spring may be provided between the lock tube and the piston rod near the outer end of the piston rod to urge the lock tube out of its coaxial position.
  • JP-A-56-14636 discloses a telescopic assembly comprising a gas spring and a locking sleeve.
  • the locking sleeve is urged out of alignment with the gas spring by an additional spring provided on the outer periphery of the cylinder to engage the locking sleeve in the fully extended position of the gas spring.
  • US Patent No. 5,358,225 discloses a telescopic as- sembly comprising a locking unit.
  • the piston rod is connected to the locking unit in a tilting joint so the locking unit is urged out of alignment when a compressive force is applied on the telescopic assembly.
  • the locking unit In the fully extended state of the telescopic assembly the locking unit will pivot when a compressive force is applied on the assembly and making the locking unit abut the end of the spring cylinder.
  • piston rod and locking unit must be provided with a tilting joint which will be require modification of the piston rod end and a joint between the piston rod and the locking unit that will withstand both compression and tension forces .
  • the telescopic assembly according to the invention is characterized in that in that in that in that said force means comprises a plug pivotably connected to said free end of the piston rod and firmly connected to the locking device and a resilient element connected with the plug and acting on said piston rod.
  • the locking device can thus relatively easily be mounted on a gas spring, and the assembly is inexpensive to manufacture.
  • said stop means comprises an edge of said locking device at said second end, whereby a stop means is provided in a very simple way.
  • several stop means are provided along the locking device starting from said second end.
  • the plug and the resilient element is made in one piece, prefera- bly in plastics, which will make the assembly even more inexpensive and easy to assemble.
  • Fig. 1 is a partly cut view of a gas spring with a locking device
  • Fig. 2 a perspective enlarged view of a plug with a resilient element
  • Fig. 3 an enlarged view of a locking device with several stop means .
  • a telescopic assembly 1 comprising a gas spring 2 housed a cylinder 3.
  • a piston rod 4 exits one end of the cylinder 3 and is con- nected to a piston (not shown) in the cylinder 3, which piston is acted on by a pressurized gas to urge the piston rod out of the cylinder 3 to a fully extended position of a free end 5 of the piston rod 4.
  • a cylindrical sleeve 11 is arranged coaxially around the cylinder 3 to act as a locking device 6 in the fully extended position of the piston rod 4, as the locking device 6 has an edge 7 at distance from the free end 5 corresponding to a position at a fully exteded position of the assembly 1, and this edge 7 can abut on the end of the cylinder 3.
  • the locking device 6 further has force means 8 to urge the edge 7 in a direction perpendicular to the axial direction of the assembly.
  • the force means 8 comprises a plug 9 press fit into one end of the cylindrical sleeve 11 to obtain a firm connection and the plug 9 is again pivotably connected to the free end 5 of the piston rod 4.
  • the plug 9 further comprises a resilient element 10 protruding from the plug 9 in direction of the cylinder 3 and acting on the piston rod 4 at a distance from the free end 5 to urge the plug 9 and therefore also the cylindrical sleeve 11 to have an angle with reference to the axial direction of the piston rod 4.
  • the plug 9 and resilient element 10 is shown in enlarged in Fig.
  • the plug 9 may further have a circular abutment 12, which the cylindrical sleeve abuts to ensure a firm connection and transfer of compression force from the cylindrical sleeve 11 to the connection at the free end 5 of the piston rod 4.
  • the plug 9 may be formed of any suitable material, such as aluminium, but it is preferred to use a plastic material, e.g. POM, which will ensure a cheap and durable element for this specific purpose.
  • a plastic material e.g. POM
  • a means comprising a plug and an integrally formed resilient element, however a separate resilient element mounted in the plug may be used, e.g. to achieve a higher resiliency, although this may result in a rise in production cost.
  • the locking device 6 may have several stop means. These stop means may comprise a) an edge 7 at the end of the locking device 6 and b) one or more additional indentations or the like along the length of the locking device 6, said indentations providing additional edges to engage with the end of the cylinder 3 during compression of the spring unit 2.
  • the cylindrical sleeve 11 must be formed of a ma- terial having a substantial rigidity to withstand buckling when the locking device is engaged.
  • a suitable material for most applications will be aluminium, but it the safety demands are less strict the cylindrical sleeve 11 may be made of a plastic mate- rial.

Abstract

A telescopic assembly (1) comprising a spring unit (2), preferably a gas spring, arranged in a cylinder (3), a piston rod (4) being connected at one end to said spring unit (2) and having a free end (5) projecting out of the cylinder (3) at one end thereof, and a locking device (6) having a first end connected to said free end (5) and a second end slidably riding on said cylinder (3), said locking device (6) having stop means positioned at least at or near its second end, said second end being positioned at or near said one end of the cylinder (3) in an extended position of the assembly (1) and force means (8) urging said stop means (7) against said one end of the cylinder (3), said force means (8) comprising a plug (9) pivotably connected to said free end (5) of the piston rod (4) and firmly connected to the locking device (6) and a resilient element (10) connected with the plug and acting on said piston rod (4).

Description

Telescopic spring unit having a locking device.
The present invention relates to a telescopic assembly comprising a spring unit, preferably a gas spring, arranged in a cylinder, a piston rod being connected at one end to said spring unit and having a free end projecting out of the cylinder at one end thereof, and a locking device having a first end connected to said free end and a second end slidably riding on said cylinder, said locking device having stop means positioned at least at or near its second end, said second end being positioned at or near said one end of the cylinder in an extended position of the assembly and force means urging said stop means against said one end of the cylinder.
Gas springs are widely used to apply a force on a body, e.g. to open a hatch, a door or a window. When the hatch, door or window is in a fully open position, and the gas spring is fully extended, it may be desirable, or necessary, to engage a locking device to prevent accidential closing. One example is a roof window, which may be used as an exit for craftsmen or builders to gain access to the roof. Of safety reasons it is necessary that the roof window will stay in the open position, so the craftsmen will be able to return to the inside of the building. Even with a strong gas spring it cannot be guaranteed that the window will stay open as it may be influenced by strong wind loading on the window or a person who ac- cidentially pushes the window or seeks support on the frame, and therefore some kind of locking device is necessary and in some countries a legislative demand.
Various examples of gas springs with locking devices for locking the piston rod in its fully ex- tended position is known in the art. One such gas spring manufactured by Arvin Control Motion has a plate spring acting on the inside of the locking device and arranged in a plug firmly connected to the free end of the piston rod and pivotably connected to the locking device.
A disadvantage of this gas spring is that the plug and locking device are pivotably connected by two small screws, making this construction labour- intensive during manufacture and therefore expensive. US Patent No. 4,596,383 discloses a telescopic assembly comprising a gas spring with a lock tube adapted to ride telescopingly over the gas spring. The gas spring is provided with an additional overex- tension spring means and the gas spring must be over- extended to engage the lock tube. Another additional spring may be provided between the lock tube and the piston rod near the outer end of the piston rod to urge the lock tube out of its coaxial position.
It is a disadvantage of this gas spring that it must be overextended to engage the lock tube. Further the spring to urge the lock tube out of coaxial position is provided between the lock tube and the piston rod, and this construction will be quite difficult to assemble and therefore expensive to manufacture. JP-A-56-14636 discloses a telescopic assembly comprising a gas spring and a locking sleeve. The locking sleeve is urged out of alignment with the gas spring by an additional spring provided on the outer periphery of the cylinder to engage the locking sleeve in the fully extended position of the gas spring.
An additional spring and a support for this spring on the outer periphery of the cylinder of the gas spring must therefore be provided, and it will be difficult to provide proper support, which will not move in axial or circumferential direction, and therefore this assembly will be relatively difficult and expensive to manufacture.
US Patent No. 5,358,225 discloses a telescopic as- sembly comprising a locking unit. The piston rod is connected to the locking unit in a tilting joint so the locking unit is urged out of alignment when a compressive force is applied on the telescopic assembly. In the fully extended state of the telescopic assembly the locking unit will pivot when a compressive force is applied on the assembly and making the locking unit abut the end of the spring cylinder.
In this prior art the piston rod and locking unit must be provided with a tilting joint which will be require modification of the piston rod end and a joint between the piston rod and the locking unit that will withstand both compression and tension forces .
It is an object of the present invention to pro- vide a telescopic assembly with a locking device that is more economical to produce, and with at least one automatic locking position in an extended state.
The telescopic assembly according to the invention is characterized in that in that said force means comprises a plug pivotably connected to said free end of the piston rod and firmly connected to the locking device and a resilient element connected with the plug and acting on said piston rod.
The locking device can thus relatively easily be mounted on a gas spring, and the assembly is inexpensive to manufacture.
According to a preferred embodiment said stop means comprises an edge of said locking device at said second end, whereby a stop means is provided in a very simple way. According to a preferred embodiment several stop means are provided along the locking device starting from said second end. An advantage of this embodiment is that these additional stop means may stop tele- scoping movement of the assembly in the event that one stop means is accidentally disengaged with the cylinder end.
According to a preferred embodiment the plug and the resilient element is made in one piece, prefera- bly in plastics, which will make the assembly even more inexpensive and easy to assemble.
In the following detailed description the invention will be explained with the aid of examples and reference to the accompanying schematic drawing in which,
Fig. 1 is a partly cut view of a gas spring with a locking device,
Fig. 2 a perspective enlarged view of a plug with a resilient element, and Fig. 3 an enlarged view of a locking device with several stop means .
In Fig. 1 is shown a telescopic assembly 1 comprising a gas spring 2 housed a cylinder 3. A piston rod 4 exits one end of the cylinder 3 and is con- nected to a piston (not shown) in the cylinder 3, which piston is acted on by a pressurized gas to urge the piston rod out of the cylinder 3 to a fully extended position of a free end 5 of the piston rod 4. A cylindrical sleeve 11 is arranged coaxially around the cylinder 3 to act as a locking device 6 in the fully extended position of the piston rod 4, as the locking device 6 has an edge 7 at distance from the free end 5 corresponding to a position at a fully exteded position of the assembly 1, and this edge 7 can abut on the end of the cylinder 3. The locking device 6 further has force means 8 to urge the edge 7 in a direction perpendicular to the axial direction of the assembly. The force means 8 comprises a plug 9 press fit into one end of the cylindrical sleeve 11 to obtain a firm connection and the plug 9 is again pivotably connected to the free end 5 of the piston rod 4. The plug 9 further comprises a resilient element 10 protruding from the plug 9 in direction of the cylinder 3 and acting on the piston rod 4 at a distance from the free end 5 to urge the plug 9 and therefore also the cylindrical sleeve 11 to have an angle with reference to the axial direction of the piston rod 4. The plug 9 and resilient element 10 is shown in enlarged in Fig. 2, and it can be seen that in this example it is formed in one piece, so the locking device 6 is very easy to assemble with the gas spring. The plug 9 may further have a circular abutment 12, which the cylindrical sleeve abuts to ensure a firm connection and transfer of compression force from the cylindrical sleeve 11 to the connection at the free end 5 of the piston rod 4.
The plug 9 may be formed of any suitable material, such as aluminium, but it is preferred to use a plastic material, e.g. POM, which will ensure a cheap and durable element for this specific purpose.
In the example is used a means comprising a plug and an integrally formed resilient element, however a separate resilient element mounted in the plug may be used, e.g. to achieve a higher resiliency, although this may result in a rise in production cost.
As shown in Fig. 3 the locking device 6 may have several stop means. These stop means may comprise a) an edge 7 at the end of the locking device 6 and b) one or more additional indentations or the like along the length of the locking device 6, said indentations providing additional edges to engage with the end of the cylinder 3 during compression of the spring unit 2.
The cylindrical sleeve 11 must be formed of a ma- terial having a substantial rigidity to withstand buckling when the locking device is engaged. A suitable material for most applications will be aluminium, but it the safety demands are less strict the cylindrical sleeve 11 may be made of a plastic mate- rial.

Claims

P A T E N T C L A I M S
1. A telescopic assembly (1) comprising a spring unit (2) , preferably a gas spring, arranged in a cylinder (3) , a piston rod (4) being connected at one end to said spring unit (2) and having a free end (5) projecting out of the cylinder (3) at one end thereof, and a locking device (6) having a first end connected to said free end (5) and a second end slidably riding on said cylinder (3) , said locking device (6) having stop means positioned at least at or near its second end, said second end being positioned at or near said one end of the cylinder (3) in an extended position of the assembly (1) and force means (8) urging said stop means against said one end of the cylinder (3) c h a r a c t e r i z e d in that said force means (8) comprises a plug (9) pivotably connected to said free end (5) of the piston rod (4) and firmly connected to the locking device (6) and a resilient element (10) connected with the plug and acting on said piston rod (4) .
2. Telescopic assembly (1) according to claim 1, c h a r a c t e r i z e d in that said stop means comprises an edge (7) of said locking device at said second end.
3. Telescopic assembly (1) according to claim 1 or 2, c h a r a c t e r i z e d in that several stop means are provided along the locking device (6) starting from said second end.
4. A telescopic assembly (1) according one of the preceding claims, c h a r a c t e r i z e d in that the plug (9) and the resilient element (10) is made in one piece, preferably in plastics.
PCT/DK2002/000023 2001-01-15 2002-01-15 Telescopic spring unit having a locking device WO2002055819A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10295692.8T DE10295692B3 (en) 2001-01-15 2002-01-15 Telescopic spring unit with a locking device
PL365250A PL203465B1 (en) 2001-01-15 2002-01-15 Telescopic assembly including a spring device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200100056 2001-01-15
DKPA200100056 2001-01-15

Publications (1)

Publication Number Publication Date
WO2002055819A1 true WO2002055819A1 (en) 2002-07-18

Family

ID=8160008

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2002/000023 WO2002055819A1 (en) 2001-01-15 2002-01-15 Telescopic spring unit having a locking device

Country Status (3)

Country Link
CN (1) CN1223750C (en)
DE (1) DE10295692B3 (en)
WO (1) WO2002055819A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1760353A1 (en) * 2005-08-30 2007-03-07 Kayaba Industry Co., Ltd. Stay damper
EP2520824A1 (en) * 2011-05-06 2012-11-07 Go.Vo.Ni. S.R.L. Mounting tool for assembling spring loaded shock absorbers
DE202013009606U1 (en) 2012-10-30 2014-01-16 Vkr Holding A/S Telescopic spring unit with a control device
US9121467B2 (en) 2006-02-10 2015-09-01 Stabilus Gmbh Lockable piston-cylinder assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102207151A (en) * 2011-05-24 2011-10-05 扬州市明瑞气弹簧有限公司 Compression gas spring capable of being self-locked and bounced
US9032587B2 (en) * 2013-02-08 2015-05-19 Barnes Group Inc. Universal stop tube
DE102016102384A1 (en) * 2016-02-11 2017-08-17 Hamm Ag Cylinder / piston assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4596383A (en) * 1984-02-21 1986-06-24 Gas Spring Company, Division Of Fichtel & Sachs Industries, Inc. Gas spring with secondary lock
US4813100A (en) * 1988-02-04 1989-03-21 King Daniel P Closure check
US4890703A (en) * 1988-05-16 1990-01-02 C. R. & I., Inc. Retention device for application to control cylinders
US6273405B2 (en) * 1999-12-01 2001-08-14 Unisia Jecs Corporation Stay damper

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5614636A (en) * 1979-07-11 1981-02-12 Kayaba Ind Co Ltd Holding mechanism of stay damper at its extreme extension
DE4216990B4 (en) * 1992-05-22 2006-01-12 Stabilus Gmbh Telescopic spring unit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4596383A (en) * 1984-02-21 1986-06-24 Gas Spring Company, Division Of Fichtel & Sachs Industries, Inc. Gas spring with secondary lock
US4813100A (en) * 1988-02-04 1989-03-21 King Daniel P Closure check
US4890703A (en) * 1988-05-16 1990-01-02 C. R. & I., Inc. Retention device for application to control cylinders
US6273405B2 (en) * 1999-12-01 2001-08-14 Unisia Jecs Corporation Stay damper

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1760353A1 (en) * 2005-08-30 2007-03-07 Kayaba Industry Co., Ltd. Stay damper
US7887031B2 (en) 2005-08-30 2011-02-15 Kayaba Industry Co., Ltd. Stay damper
US9121467B2 (en) 2006-02-10 2015-09-01 Stabilus Gmbh Lockable piston-cylinder assembly
EP2520824A1 (en) * 2011-05-06 2012-11-07 Go.Vo.Ni. S.R.L. Mounting tool for assembling spring loaded shock absorbers
ITMO20110102A1 (en) * 2011-05-06 2012-11-07 Go Vo Ni Srl MOUNTING DEVICE FOR SHOCK ABSORBERS, PARTICULARLY FOR GAS SHOCKS
DE202013009606U1 (en) 2012-10-30 2014-01-16 Vkr Holding A/S Telescopic spring unit with a control device
DK177972B1 (en) * 2012-10-30 2015-02-09 Vkr Holding As Telescopic spring unit with a control device

Also Published As

Publication number Publication date
CN1223750C (en) 2005-10-19
PL365250A1 (en) 2004-12-27
DE10295692T1 (en) 2003-12-11
CN1486390A (en) 2004-03-31
DE10295692B3 (en) 2014-08-28

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