EP1958917B1 - Telescope shot - Google Patents
Telescope shot Download PDFInfo
- Publication number
- EP1958917B1 EP1958917B1 EP20070024227 EP07024227A EP1958917B1 EP 1958917 B1 EP1958917 B1 EP 1958917B1 EP 20070024227 EP20070024227 EP 20070024227 EP 07024227 A EP07024227 A EP 07024227A EP 1958917 B1 EP1958917 B1 EP 1958917B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thickness
- section
- metal sheet
- welding
- cut
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
Links
- 238000003466 welding Methods 0.000 claims description 29
- 239000002184 metal Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 description 12
- 239000000945 filler Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 238000009499 grossing Methods 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/708—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic locking devices for telescopic jibs
Definitions
- the invention relates to a telescopic weft according to the preamble of claim 1.
- Telescopic shots are used, for example, in mobile cranes. They usually consist of profile tubes. After pushing out, they are bolted together. These Verbolzstellen transfer large forces. They are usually carried out reinforced. Such a reinforced design is usually carried out by a further sheet metal layer which is applied in this area. This additional sheet metal layer is referred to as a bolt plate or locking plate.
- the bolt plates or locking plates are welded onto the profile tube at the bolting point.
- the bolted joints are reinforced by the welded-on sheet metal.
- the base material of the telescopic section but charged by the welding process.
- the welding process itself is expensive.
- the so-called MAG welding process is usually used.
- Object of the present invention is therefore to provide a generic telescope shot with a simple to apply and structurally stable Verbolzstelle.
- a telescopic weft which consists of a profile tube with at least one recess having a Verbolzstelle, with a Verbolzstelle provided from a metal sheet, which is welded via a butt weld via laser beam welding or laser hybrid welding in the profile tube.
- Laser beam welding in contrast to laser hybrid welding, has the great advantage that no filler metal is required because the base material alone is melted and forms the weld seam. Thus, the yield strength of the base material can be fully utilized. Laser hybrid welding is used when there is a larger gap between the sheets to be joined.
- the bolt plate can not be welded according to the teaching of claim 1, since due to the strong shrinkage stresses in the radial direction already at or shortly after welding there is a risk of cracking at or in the seam.
- Verbolzstelle forming sheet of the same material as the profile tube but is formed comparatively thicker.
- the Verbolzstelle is circular and its serving to receive a bolt recess is arranged almost centrally.
- the plate forming the bolting point has a thickness increasing towards its recess in the direction of the bolting point.
- the bolted plate is designed in such a way that the sheet forming the bolting point thickens steadily from the sheet thickness of the profile tube to the larger thickness of the plate-shaped central area around the recess.
- FIG. 1 the plan view of a top flange of a telescopic section belonging to a profile tube 10 is shown, in which a Verbolzstelle 12 is arranged in the form of a Verbolztellers.
- the Verbolzstelle 12 has almost centrally a recess 14 through which a not shown here bolts for producing a bolt connection can be inserted.
- FIG. 1 In the illustration according to FIG. 1 only a section of the telescopic section forming a profile tube 10 is shown.
- the telescopic weft is to be bolted after pushing out with another telescopic weft with appropriate Verbolzstelle.
- Verbolzvorganges The manner of such a Verbolzvorganges is well known and will therefore not be shown again in detail at this point.
- the statement made in the exemplary embodiment with respect to the telescopic weft statement applies in the same way to an articulated weft application.
- the Verbolzstelle 12 is attached to the upper flange of the telescopic section.
- a corresponding Verbolzstelle but also be provided on the lower flange or on the side walls.
- FIG. 3 is the joint area between the profile tube 10 and Verbolzstelle 12 shown enlarged.
- the intended in the region of this joint weld 16 results from the enlarged view according to FIG. 4 ,
- This is a butt joint in the form of an I-seam.
- a compound as a 1-seam (butt weld) has a significantly lower negative metallurgical influence on the component to be produced by the welding process.
- the notch case is favorably influenced by the geometric design of the weld. This results in a significantly higher fatigue strength.
- the circular Verbolzteller is divided into different thickness ranges.
- the thickness of the bolt plate corresponds to that of the sheet thickness of the surrounding profile tube 10. This thickness retains the bolt plate for a region 18.
- the bolt plate has approximately three times the thickness. This area is shown here at 20. From the region 18 of lesser thickness to the region 20 of greater thickness, the thickness increases steadily in a transition region 22.
- the advantages of this solution are a very favorable flow of forces. Due to the butt joint and the notch-free seam transition as well as the low residual weld stress, a weld with very good mechanical properties is created here.
- the laser seam is aftertreated. This is done by at least one side smoothing the laser weld. This smoothing can be done, for example, thermally by laser post-treatment with an unsharp laser. Other smoothing methods, such as, for example, mechanical smoothing methods, can alternatively be used.
- the Verbolzteller is performed circular.
- any other form of the bolted plate is possible, that is, for example, a polygonal symmetrical or asymmetrical shape.
- the arrangement and geometric configuration of the recess 14 is not limited to the embodiment described above within the scope of the invention. Again, any shapes can be realized within the scope of the invention.
- the position of the receiving points of the bolt is not necessarily central, but may also vary within the scope of the invention.
- the required gap in the laser beam welding or laser hybrid welding can be achieved on the one hand by machining the Verbolztellers with the appropriate Tolleranzen and on the other hand at the hole in the tube of the telescopic section by laser cutting.
- the profile tube and the bolt plate are advantageously made of a fine grain structural steel with a high yield strength. Due to the use of laser beam welding or laser hybrid welding, no filler metal is needed, because the base material alone is melted and forms the weld. Thus, the yield strength of the material can be fully utilized.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Description
Die Erfindung betrifft einen Teleskopschuß nach dem Oberbegriff des Anspruchs 1.The invention relates to a telescopic weft according to the preamble of
Teleskopschüsse werden beispielsweise bei Mobilkranen eingesetzt. Sie bestehen üblicherweise aus Profilrohren. Nach dem Ausschieben werden sie miteinander verbolzt. Diese Verbolzstellen übertragen große Kräfte. Dabei werden sie üblicherweise verstärkt ausgeführt. Eine derartig verstärkte Ausführung erfolgt üblicherweise durch eine weitere Blechlage, die in diesem Bereich aufgebracht wird. Diese zusätzliche Blechlage wird als Verbolzteller oder auch Verriegelungsblech bezeichnet.Telescopic shots are used, for example, in mobile cranes. They usually consist of profile tubes. After pushing out, they are bolted together. These Verbolzstellen transfer large forces. They are usually carried out reinforced. Such a reinforced design is usually carried out by a further sheet metal layer which is applied in this area. This additional sheet metal layer is referred to as a bolt plate or locking plate.
Die Verbolzteller bzw. Verriegelungsbleche werden an der Verbolzstelle auf das Profilrohr aufgeschweißt. Durch das aufgeschweißte Blech werden einerseits die Verbolzstellen verstärkt. Andererseits wird das Grundmaterial des Teleskopschusses aber durch den Schweißvorgang belastet. Der Schweißvorgang selbst ist aufwendig. Hier wird üblicherweise das sogenannte MAG-Schweißverfahren eingesetzt. Hier handelt es sich um Metallschutzgasschweißen. Genauer handelt es sich um ein Lichtbogenschweißverfahren, bei dem der abschmelzende Schweißdraht von einem Motor in veränderbarer Geschwindigkeit kontinuierlich nachgeführt wird. Gleichzeitig wird die Schweißstelle über eine Düse mit Kohlendioxyd oder einem Edelgas begast. Dieses Gas schützt das flüssige Metall unter dem Lichtbogen vor Oxidation, die die Schweißnaht schwächen würde. Bei dem MAG-Verfahren (Metall-Aktivgas-Schweißen) wird entweder mit reinem CO2 oder einem Mischgas aus CO2, Argon und O2 gearbeitet, um die Schweißverbindung entsprechend dem besonderen technologischen Erfordernissen zu beeinflussen. Nachteilig bei diesem Verfahren ist es, dass ein Schweißzusatzwerkstoff verwendet werden muss. Dieser verwendete Schweißzusatzwerkstoff ist wegen der höheren Dehnung derart ausgewählt, dass er üblicherweise eine Streckgrenze von 700 N/mm2 aufweist. Wird nun bei dem Teleskopschuß und dem entsprechend vorzusehenden Verbolzteller ein Grundwerkstoff mit einer wesentlich höheren Streckgrenze, beispielsweise 1100 N/mm2 eingesetzt, so ist die Schweißnaht mit dem weniger belastbaren Schweißzusatzwerkstoff das schwächste Glied der Konstruktion.The bolt plates or locking plates are welded onto the profile tube at the bolting point. On the one hand, the bolted joints are reinforced by the welded-on sheet metal. On the other hand, the base material of the telescopic section but charged by the welding process. The welding process itself is expensive. Here, the so-called MAG welding process is usually used. This is metal arc gas welding. Specifically, it is an arc welding method in which the consumable welding wire is continuously tracked by a motor in variable speed. At the same time, the weld is gassed via a nozzle with carbon dioxide or a noble gas. This gas protects the liquid metal under the arc from oxidation, which would weaken the weld. In the MAG process (metal-active gas welding), either pure CO 2 or a mixed gas of CO 2 , argon and O 2 is used to influence the welded joint according to the particular technological requirements. A disadvantage of this method is that a filler metal must be used. This welding filler used is selected such that it usually has a yield strength of 700 N / mm 2 because of the higher elongation. Now, if a base material with a much higher yield strength, for example, 1100 N / mm 2 used in the telescopic weft and the corresponding to be provided Verbolzteller, the weld with the less resilient filler metal is the weakest link in the construction.
Bei einem bekannten Herstellverfahren zum Einschweißen von Verbolztellern bzw. Verriegelungsblechen werden drei Schweißstellen vorgesehen, wobei diese Schweißstellen jeweils so ausgeführt sind, dass mindestens zwei Schweißlagen herzustellen sind. Somit ergeben sich hier insgesamt sechs Schweißlagen. Aufgrund der hohen Energieeinbringung durch die Vielzahl dieser Schweißlagen im MAG-Verfarehn ist ein höherer Schweißverzug vorhanden. Hierdurch ist ein erhöhter Aufwand beim Richten nach dem Schweißen bedingt.In a known manufacturing method for welding Verbolztellern or locking plates three welds are provided, these welds are each carried out so that at least two weld layers are to be produced. This results in a total of six welding layers. Due to the high energy input due to the large number of these welding layers in the MAG-Verfarehn a higher welding distortion is present. As a result, an increased effort in straightening after welding is required.
Aus der
Aufgabe der vorliegenden Erfindung ist es daher, einen gattungsgemäßen Teleskopschuß mit einer einfach aufzubringenden und konstruktiv stabileren Verbolzstelle zu versehen.Object of the present invention is therefore to provide a generic telescope shot with a simple to apply and structurally stable Verbolzstelle.
Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruchs 1 gelöst.According to the invention, this object is solved by the features of
Nach dieser Lösung wird ein Teleskopschuß, der aus einem Profilrohr mit mindestens einer eine Ausnehmung aufweisenden Verbolzstelle besteht, mit einer Verbolzstelle aus einem Blech versehen, das über eine Stumpfnaht über Laserstrahlschweißen oder Laserhybridschweißen in das Profilrohr eingeschweißt wird.After this solution, a telescopic weft, which consists of a profile tube with at least one recess having a Verbolzstelle, with a Verbolzstelle provided from a metal sheet, which is welded via a butt weld via laser beam welding or laser hybrid welding in the profile tube.
Laserstrahlschweißen hat entgegen Laserhybridschweißen den großen Vorteil, dass kein Schweißzusatzwerkstoff benötigt wird, da der Grundstoff allein geschmolzen wird und die Schweißnaht bildet. Damit kann die Streckgrenze des Grundstoffs voll ausgenutzt werden. Laserhybridschweißen wird eingesetzt, wenn ein größeres Spaltmaß zwischen den zu verbindenden Blechen vorhanden ist.Laser beam welding, in contrast to laser hybrid welding, has the great advantage that no filler metal is required because the base material alone is melted and forms the weld seam. Thus, the yield strength of the base material can be fully utilized. Laser hybrid welding is used when there is a larger gap between the sheets to be joined.
Mit einem konventionellen Schweißverfahren, wie beispielsweise einem MAG-Schweißverfahren kann der Verbolzteller nicht entsprechend der Lehre des Anspruchs 1 eingeschweißt werden, da aufgrund der starken Schrumpfspannungen in radialer Richtung bereits beim oder kurz nach dem Schweißen die Gefahr der Rißbildung an oder in der Naht besteht.With a conventional welding method, such as an MAG welding method, the bolt plate can not be welded according to the teaching of
Besonders vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den sich an den Hauptanspruch anschließenden Unteransprüchen.Particularly advantageous embodiments of the invention will become apparent from the subsequent claims to the main claim.
Demnach besteht das die Verbolzstelle bildende Blech aus demselben Material wie das Profilrohr, ist jedoch vergleichsweise dicker ausgebildet.Accordingly, there is the Verbolzstelle forming sheet of the same material as the profile tube, but is formed comparatively thicker.
Vorteilhaft ist die Verbolzstelle kreisförmig ausgebildet und ihre zur Aufnahme eines Bolzens dienende Ausnehmung ist nahezu mittig angeordnet.Advantageously, the Verbolzstelle is circular and its serving to receive a bolt recess is arranged almost centrally.
Gemäß einem anderen Vorteil weist das die Verbolzstelle bildende Blech eine zu seiner Ausnehmung in Richtung Verbolzstelle hin zunehmende Dicke auf.According to another advantage, the plate forming the bolting point has a thickness increasing towards its recess in the direction of the bolting point.
Gemäß einer weiteren besonderen Ausgestaltung der Erfindung ist der Verbolzteller derart besonders gestaltet, dass das die Verbolzstelle bildende Blech von der Blechdicke des Profilrohres ausgehend sich stetig zur größeren Dicke des tellerförmigen mittleren Bereiches um die Ausnehmung herum verdickt.According to a further particular embodiment of the invention, the bolted plate is designed in such a way that the sheet forming the bolting point thickens steadily from the sheet thickness of the profile tube to the larger thickness of the plate-shaped central area around the recess.
Die Vorteile der erfindungsgemäßen Lösung gegenüber aufgedoppelten Verriegelungsblechen (und Scheiben innen) liegen in einem günstigen Kräftefluß bedingt durch eine Stumpfnahtverbindung mit kerbfreiem Nahtübergang und geringer Schweißeigenspannung. Aufdopplungen (Lamellen), selbst mit flach auslaufenden Kehlnähten angeschweißt, sind als schlechterer Kerbfall eingestuft als Stumpfnähte.The advantages of the solution according to the invention over doubled locking plates (and discs inside) are in a favorable flow of forces due to a butt weld with notch-free seam transition and low Schweißeigenspannung. Duplication (lamellae), even welded with flat-running fillet welds, are classified as a worse notch case than butt welds.
Weitere Merkmale, Einzelheiten und Vorteile der Erfindung werden anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:
- Figur 1:
- eine Draufsicht auf ein Detail eines Teleskopschusses mit einer Verbolzstelle,
- Figur 2:
- ein Schnitt entlang der Schnittlinie A-A in
,Figur 1 - Figur 3:
das Detail 1 entsprechendFigur 2 und- Figur 4:
- das Detail X gemäß
Figur 4 .
- FIG. 1:
- a top view of a detail of a telescopic section with a Verbolzstelle,
- FIG. 2:
- a section along the section line AA in
FIG. 1 . - FIG. 3:
- the
detail 1 accordinglyFIG. 2 and - FIG. 4:
- the detail X according to
FIG. 4 ,
In
In der Darstellung gemäß
Im hier dargestellten Ausführungsbeispiel ist die Verbolzstelle 12 am Obergurt des Teleskopschusses angebracht. Alternativ kann eine entsprechende Verbolzstelle aber auch am Untergurt oder auch an den Seitenwänden vorgesehen sein.In the embodiment shown here, the
Wie insbesondere in
Wie aus der
Die auftretenden kleinen Überhöhungen an der Ober- und gegebenenfalls Unterseite der Naht 16 (vgl.
Um die Kerbwirkung (z. B. durch Wurzeldurchhang oder Kantenversatz oder Decklagenüberhöhung) wesentlich zu verringern, wird die Lasernaht nachbehandelt. Dies erfolgt durch ein mindestens einseitiges Glätten der Laserschweißnaht. Dieses Glätten kann beispielsweise thermisch dadurch erfolgen, dass eine Lasernachbehandlung mit einem unscharf eingestellten Laser erfolgt. Andere Glättverfahren, wie beispielsweise mechanische Glättverfahren sind aber alternativ auch einsetzbar.In order to significantly reduce the notch effect (eg due to root sag or edge offset or overburden), the laser seam is aftertreated. This is done by at least one side smoothing the laser weld. This smoothing can be done, for example, thermally by laser post-treatment with an unsharp laser. Other smoothing methods, such as, for example, mechanical smoothing methods, can alternatively be used.
Im vorliegenden Ausführungsbeispiel wird der Verbolzteller kreisrund ausgeführt. Im Rahmen der Erfindung ist aber auch jede andere Form des Verbolztellers möglich, also beispielsweise eine mehreckige symmetrische oder asymmetrische Formgebung. Auch die Anordnung und geometrische Gestaltung der Ausnehmung 14 ist nicht auf die zuvor beschriebene Ausführungsform im Rahmen der Erfindung begrenzt. Auch hier können beliebige Formgebungen im Rahmen der Erfindung verwirklicht werden. Auch die Lage der Aufnahmestellen des Bolzens ist nicht zwangsläufig mittig, sondern kann im Rahmen der Erfindung ebenfalls variieren.In the present embodiment, the Verbolzteller is performed circular. In the context of the invention, however, any other form of the bolted plate is possible, that is, for example, a polygonal symmetrical or asymmetrical shape. The arrangement and geometric configuration of the
Das erforderliche Spaltmaß beim Laserstrahlschweißen bzw. Laserhybridschweißen kann einerseits durch spanabhebende Bearbeitung des Verbolztellers mit den entsprechenden Tolleranzen und andererseits an dem Loch im Rohr des Teleskopschusses durch Laserschneiden erreicht werden.The required gap in the laser beam welding or laser hybrid welding can be achieved on the one hand by machining the Verbolztellers with the appropriate Tolleranzen and on the other hand at the hole in the tube of the telescopic section by laser cutting.
Vorteilhaft wird durch die vorgenannte Lösung ein Schweißverfahren mit geringem Verzug durch die eingebrachte hohe Energiedichte bei gleichzeitigem Erreichen der erforderlichen mechanischen Eigenschaften gewährleistet.Advantageously, by the aforementioned solution, a welding process with low distortion ensured by the introduced high energy density while achieving the required mechanical properties.
Vorteilhaft sind das Profilrohr und der Verbolzteller aus einem Feinkornbaustahl mit großer Streckgrenze gefertigt. Aufgrund der Verwendung des Laserstrahlschwei-βens bzw. des Laserhybridschweißens wird kein Schweißzusatzwerkstoff benötigt, da der Grundwerkstoff allein geschmolzen wird und die Schweißnaht bildet. Somit kann die Streckgrenze des Materials voll ausgenutzt werden.The profile tube and the bolt plate are advantageously made of a fine grain structural steel with a high yield strength. Due to the use of laser beam welding or laser hybrid welding, no filler metal is needed, because the base material alone is melted and forms the weld. Thus, the yield strength of the material can be fully utilized.
Claims (6)
- A telescopic section comprising a section tube (10) having at least one bolted point (12) having a cut-out (14) and comprising a metal sheet,
characterised in that
the metal sheet forming the bolted point (12) is divided into different thickness regions, with said metal sheet corresponding at its marginal regions (18) to the sheet metal thickness of the section tube (10) surrounding it and being welded into the section tube (10) by means of laser jet welding or laser hybrid welding via a butt weld. - A telescopic section in accordance with claim 1, characterised in that the metal sheet forming the bolted point (12) comprises the same material as the section tube (10), but is comparatively thicker in the region of the cut-out (14).
- A telescopic section in accordance with claim 1, characterised in that the metal sheet forming the bolted point (12) comprises a different material to the section tube (10).
- A telescopic section in accordance with one of the preceding claims, characterised in that the bolted point (12) is circular and its cut-out (14) serving to receive a bolt is arranged almost centrally.
- A telescopic section in accordance with one of the claims 1 to 4, characterised in that the metal sheet forming the bolted point (12) has a thickness which increases towards its cut-out (14).
- A telescopic section in accordance with one of the claims 1 to 5, characterised in that the metal sheet forming the bolted point (12) has a thickness which constantly increases starting from the sheet metal thickness of the section tube (10) to the greater thickness of the plate-shaped middle region about the cut-out (14).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200720002203 DE202007002203U1 (en) | 2007-02-14 | 2007-02-14 | telescopic section |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1958917A1 EP1958917A1 (en) | 2008-08-20 |
EP1958917B1 true EP1958917B1 (en) | 2013-02-13 |
Family
ID=39469516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20070024227 Ceased EP1958917B1 (en) | 2007-02-14 | 2007-12-13 | Telescope shot |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1958917B1 (en) |
DE (1) | DE202007002203U1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009012772A1 (en) | 2009-03-13 | 2010-09-16 | Koki Technik Seating Systems Gmbh | Motor vehicle seat, has seat depth adjustment mechanism for adjustment of seat depth, where backrest and seat are connected by mechanism and base body of backrest and/or seat is made of plastic |
DE202010013544U1 (en) * | 2010-09-23 | 2012-01-19 | Liebherr-Werk Ehingen Gmbh | Telescopic weft and crane with telescopic weft |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4018222A1 (en) * | 1990-06-07 | 1991-12-12 | Krupp Industrietech | TELESCOPIC BOOM WITH CLUTCH DEVICE FOR EXTENSION ARRANGEMENT |
DE19836085A1 (en) * | 1997-09-11 | 1999-04-01 | Mannesmann Ag | Procedure for manufacture of profiled track for telescopic jib of crane |
ATE286849T1 (en) * | 1999-04-29 | 2005-01-15 | Terex Demag Gmbh & Co Kg | CRANE WITH A TELESCOPIC BOOM |
DE10113471B4 (en) * | 2001-03-19 | 2005-02-17 | Highyag Lasertechnologie Gmbh | Method for hybrid welding by means of a laser double focus |
-
2007
- 2007-02-14 DE DE200720002203 patent/DE202007002203U1/en not_active Expired - Lifetime
- 2007-12-13 EP EP20070024227 patent/EP1958917B1/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
EP1958917A1 (en) | 2008-08-20 |
DE202007002203U1 (en) | 2008-06-26 |
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