EP1336586B1 - Lifting cylinder arrangement for lifting platforms - Google Patents
Lifting cylinder arrangement for lifting platforms Download PDFInfo
- Publication number
- EP1336586B1 EP1336586B1 EP03002099A EP03002099A EP1336586B1 EP 1336586 B1 EP1336586 B1 EP 1336586B1 EP 03002099 A EP03002099 A EP 03002099A EP 03002099 A EP03002099 A EP 03002099A EP 1336586 B1 EP1336586 B1 EP 1336586B1
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- EP
- European Patent Office
- Prior art keywords
- guiding tube
- lifting
- piston assembly
- assembly according
- tube
- 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.)
- Expired - Lifetime
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- 239000000463 material Substances 0.000 claims abstract description 13
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 10
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 10
- 239000004033 plastic Substances 0.000 claims abstract description 8
- 229920003023 plastic Polymers 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 4
- -1 polyethylene Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 239000004952 Polyamide Substances 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 14
- 238000000576 coating method Methods 0.000 abstract description 14
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 238000005488 sandblasting Methods 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
Definitions
- the invention relates to a Hubstempelan extract for lifts with a raised and lowered dimensionally stable guide tube, on the upper end supporting elements for the device to be lifted, e.g. a motor vehicle, are fixed, with a drive unit coupled to the guide tube for its lifting and lowering movements and with a stationary guide sleeve, the sliding elements bear against the guide tube.
- Each lifting ram contains a dimensionally stable steel tube of round or polygonal cross section, which is guided in a mostly arranged at ground level cuff and is moved by a suitable hoist, usually a positioned inside the tube hydraulic cylinder, vertically from a basic position at ground level in a raised operating position.
- a suitable hoist usually a positioned inside the tube hydraulic cylinder, vertically from a basic position at ground level in a raised operating position.
- a support structure for the motor vehicle to be lifted is attached, the flat ramp carrier, swiveling telescopic arms od with end support pieces.
- DE 20 106 513 U1 on which the preamble of claim 1 is based shows a telescopic column, in particular for lifting tables in furniture or the like, consisting of two or more, different sized base surfaces having tubes, each with a smaller base area in a tube larger base area and pushed out is and between the inner sides of the respective larger tube and the outer sides of the respective smaller tube guide elements are arranged.
- the object of the invention is to provide a generic Hubstkovan extract, which has the least possible wear under load with large forces, whereby the life of the guide is increased.
- the sprayed-on coating material together with the adjacent steel areas is subjected to a heat treatment in an oven at about 200 to 250 ° C.
- the layer thickness of the cured sliding coating is then about 10 to 50 microns.
- the PTFE material is tumbled into the fine recesses of the roughened tube surface, which enhances the long term adhesion of the slip coating to the guide tube.
- the main advantages of the Hubstempelan extract invention are the excellent sliding properties and the high wear resistance of Gleit vompet.
- special relatively high molecular weight plastic sliders such as hard polyethylene (e.g., PE1000) which have sufficiently high strength and will not injure the PTFE-containing sliding liner of the guide tube. Due to the increased temperature and also pressure stresses PTFE components are firmly embedded in the fine depressions and molecular gaps of the roughened tube surface, whereby durable sliding and emergency running properties are achieved even if a large part of the friction lining rubbed off by the movements of the guide tube on the sliding elements Has.
- the drawing shows a schematic axial section of the upper part of a Hubstkovs 1, which contains a vertical guide tube 2 from here square cross-section and a coaxial built-in its interior piston-cylinder unit 3 as a lifting unit.
- the piston-cylinder unit 3 has a fixed on a - not shown - lower base fixed piston 4 and a vertically displaceable on the piston 4 cylinder housing 5, the upper end is fixed in a thick-walled plate member 6, which is connected to the end portion of the guide tube. 2 is firmly connected.
- a PTFE lubricating film is then applied to this surface e.g. applied by spraying and cured by a preferably carried out in a furnace heat treatment of 230 ° C.
- a stationary guide sleeve 10 which in the illustrated embodiment with the square guide tube 2 either two or four diametrically opposed dimensionally stable plates 11 has.
- These plates 11 are permanently attached to the underside of a load-bearing base plate 12, for example by welding, which represents a part of the laid in the ground support structure of the lift.
- a pressure plate 14 and an inside plate-shaped sliding member 15 is set, forms the inner contact surface with the sliding coating 7 on the outer surface of the guide tube 2 a Gleit vomplanung.
- a pressure plate 14 and an inside plate-shaped sliding member 15 is set, forms the inner contact surface with the sliding coating 7 on the outer surface of the guide tube 2 a Gleit vomplanung.
- In the illustrated embodiment with square guide tube 2 are preferably eight identical plate-shaped sliding elements 15 - for each tube side two sliding elements 15 - provided, each consisting of a possibly provided with fillers hard polyethylene material.
- each plate 11 At the lower end region of each plate 11, a lower retaining web 16 and a lowermost reinforcing collar 17 are attached to stabilize the guide sleeve, which serve for fixing a lower pressure plate 18 and two plate-shaped sliding elements 19.
- the lower sliding elements 19 are made of the same material as the upper sliding elements 15 and, like them, are arranged in pairs on each tube side.
- upper and lower screws 20, 21 are provided, which on the associated pressure plate 14, 18 and through this on the sliding elements 15, 19 can exert a defined pressure.
- the sliding elements 15, 19 may not consist continuously of the plastic material, but only be provided with such a coating of suitable wall thickness.
- the positioning and fixing of these sliding elements in the guide sleeve containing the pipe section can also be done in other appropriate ways.
- the guide tubes may have almost any cross-section, polygonal, oval or circular, and also consist of another suitable sufficiently rigid and viable material as steel.
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Types And Forms Of Lifts (AREA)
- Actuator (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Sliding-Contact Bearings (AREA)
- Supports For Pipes And Cables (AREA)
- Manufacturing Optical Record Carriers (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
Description
Die Erfindung betrifft eine Hubstempelanordnung für Hebebühnen mit einem heb- und senkbaren formsteifen Führungsrohr, auf dessen oberem Ende Tragelemente für die zu liftende Vorrichtung, z.B. ein Kfz, befestigt sind, mit einem mit dem Führungsrohr gekoppelten Antriebsaggregat für dessen Hub- und Senkbewegungen und mit einer ortsfesten Führungsmanschette, deren Gleitelemente am Führungsrohr anliegen.The invention relates to a Hubstempelanordnung for lifts with a raised and lowered dimensionally stable guide tube, on the upper end supporting elements for the device to be lifted, e.g. a motor vehicle, are fixed, with a drive unit coupled to the guide tube for its lifting and lowering movements and with a stationary guide sleeve, the sliding elements bear against the guide tube.
Derartige Hubstempelanordnungen werden vorzugsweise in unterflurigen Kfz-Hebebühnen in Ein- oder Mehr-Stempelausführungen eingesetzt. Jeder Hubstempel enthält ein formsteifes Stahlrohr von rundem oder auch mehreckigem Querschnitt, das in einer meist im Bodenniveau angeordneten Manschette geführt ist und von einem geeigneten Hebezeug, meist einem im Rohrinneren positionierten Hydraulikzylinder, vertikal aus einer Grundstellung im Bodenniveau in eine angehobene Betriebsstellung bewegt wird. Auf dem oberen Ende dieses Führungsrohrs ist eine Auflagerkonstruktion für das anzuhebende Kraftfahrzeug befestigt, die flache Auffahrträger, schwenkbare Teleskoparme mit endseitigen Tragstücken od. dgl., aufweisen kann. Bei derartigen Hubstempelanordnungen sind die mit den Gleitkörpern in den Manschetten zusammenwirkenden äußeren Gleitflächen der Führungsstempel hartverchromt, um die erforderlichen Gleiteigenschaften auch bei mehrjährigen Betriebszeiten aufrechtzuerhalten. Damit die notwendige dauerhafte Haftung der Chromschicht erzielt und Verschleißerscheinungen an den Gleitfläche verhindert werden können, werden die Außenflächen der Führungsstempel zuerst mit einer dünnen Metallschicht aus insbesondere Ni versehen, bevor die Hartchromschicht durch bekannte Maßnahmen aufgebracht wird. Eine derartige Beschichtung ist technisch aufwendig und kostspielig.Such Hubstempelanordnungen are preferably used in underfloor vehicle lifts in single or multi-punch designs. Each lifting ram contains a dimensionally stable steel tube of round or polygonal cross section, which is guided in a mostly arranged at ground level cuff and is moved by a suitable hoist, usually a positioned inside the tube hydraulic cylinder, vertically from a basic position at ground level in a raised operating position. On the top End of this guide tube, a support structure for the motor vehicle to be lifted is attached, the flat ramp carrier, swiveling telescopic arms od with end support pieces. Like., Can have. In such Hubstempelanordnungen cooperating with the sliders in the sleeves outer sliding surfaces of the guide ram are hard chrome plated in order to maintain the required sliding properties even with multi-year operating times. So that the necessary permanent adhesion of the chromium layer can be achieved and signs of wear on the sliding surface can be prevented, the outer surfaces of the guide punch are first provided with a thin metal layer, in particular Ni, before the hard chrome layer is applied by known measures. Such a coating is technically complicated and expensive.
Damit die Gleiteigenschaften zwischen den Rohren verbessert wird, wird vorgeschlagen, die Rohre mit einer Gleitlackbeschichtung zu versehen.In order to improve the sliding properties between the pipes, it is proposed to provide the pipes with an anti-friction coating.
Aufgabe der Erfindung ist es, eine gattungsgemäße Hubstempelanordnung zu schaffen, die bei Belastung mit großen Kräften einen möglichst geringen Verschleiß aufweist, wodurch die Lebensdauer der Führung erhöht wird.The object of the invention is to provide a generic Hubstempelanordnung, which has the least possible wear under load with large forces, whereby the life of the guide is increased.
Die Aufgabe wird gemäß Patentanspruch 1 gelöst. Die abhängigen Patentansprüche beschreiben bevorzugte Ausführungsformen der vorliegenden Erfindung.The problem is solved according to
In der Praxis hat sich gezeigt, daß ein nur wenige Hundertstel Millimeter dicker Gleitbelag aus einem harten PTFE-haltigen Kunststoffmaterial gegenüber den bekannten verchromtem Führungsrohren nicht nur wesentlich kostengünstiger hergestellt werden kann, sondern daß aufgrund der bekannten hervorragenden Gleiteigenschaften von PTFE auch geringere Reibungswerte erreichbar sind, und zwar auch nach einer außerordentlich hohen Anzahl an Hub- und Senkbewegungen des Führungsrohrs unter Last, was ausreichend langen Betriebszeiten entspricht.In practice, it has been found that a few hundredths of a millimeter thick sliding coating of a hard PTFE-containing plastic material over the known chromium-plated guide tubes not only can be made much cheaper, but also lower friction values can be achieved due to the known outstanding sliding properties of PTFE, even after an extremely high number of lifting and lowering movements of the guide tube under load, which corresponds to sufficiently long operating times.
Ein extrem niedriger Verschleiß der Gleitflächenpaarung kann erreicht werden, wenn die in der ortsfesten Führungsmanschette eingebauten Gleitelemente aus einem formsteifen harten Kunststoffmaterial insbesondere auf Polyethylen- oder Polyamidbasis bestehen.An extremely low wear of the sliding surface pairing can be achieved if the built-in stationary guide sleeve sliding elements made of a dimensionally stable hard plastic material in particular on polyethylene or polyamide-based.
Zum Erhalt der hochfesten, dauerhaften und durchgehenden Verbindung des Gleitbelags aus dem PTFE-haltigen Kunststoffmaterial auf dem Stahlführungsrohr ist es zweckmäßig, die Oberfläche des Führungsrohrs sorgfältig zu reinigen und z.B. durch Sandstrahlen aufzurauhen, bevor der Gleitbelag z.B. in Form eines Flüssigfilms auf die Rohroberfläche aufgebracht wird. Um den Gleitbelag selbst zu verfestigen und auch die Bindung zum aufgerauhten Untergrund zu fördern, wird das aufgesprühte Beschichtungsmaterial zusammen mit den angrenzenden Stahlbereichen einer Wärmebehandlung in einem Ofen bei ca. 200 bis 250 °C ausgesetzt. Die Schichtstärke des ausgehärteten Gleitbelages beträgt danach etwa 10 bis 50 µm. Bei Betriebsbelastungen wird das PTFE-Material in die feinen Vertiefungen der aufgerauhten Rohroberfläche hineingewalkt, was die Langzeithaftung des Gleitbelages auf dem Führungsrohr verstärkt.To obtain the high-strength, permanent and continuous connection of the sliding coating of the PTFE-containing plastic material on the steel guide tube, it is expedient to carefully clean the surface of the guide tube and roughen by sandblasting, for example, before the sliding coating is applied in the form of a liquid film on the pipe surface , In order to solidify the sliding coating itself and also to promote bonding to the roughened substrate, the sprayed-on coating material together with the adjacent steel areas is subjected to a heat treatment in an oven at about 200 to 250 ° C. The layer thickness of the cured sliding coating is then about 10 to 50 microns. At service loads, the PTFE material is tumbled into the fine recesses of the roughened tube surface, which enhances the long term adhesion of the slip coating to the guide tube.
Die wesentlichen Vorteile der erfindungsgemäßen Hubstempelanordnung liegen in den hervorragenden Gleiteigenschaften und der hohen Verschleißfestigkeit der Gleitflächenpaarungen. Zur Erzielung optimaler Gleiteigenschaften werden spezielle Gleitstücke aus relativ hartem hochmolekularem Kunststoff, wie hartes Polyethylen (z.B. PE1000), verwendet, die eine ausreichend hohe Festigkeit haben und den PTFE-haltigen Gleitbelag des Führungsrohrs nicht verletzen. Durch die erhöhte Temperatur und auch Druckbeanspruchungen werden PTFE-Bestandteile in die feinen Vertiefungen und molekularen Zwischenräume der aufgerauhten Rohroberfläche fest eingelagert, wodurch dauerhafte Gleit- und Notlaufeigenschaften auch dann erreicht werden, wenn ein Großteil des Reibbelags sich durch die Bewegungen des Führungsrohrs an den Gleitelementen abgerieben hat.The main advantages of the Hubstempelanordnung invention are the excellent sliding properties and the high wear resistance of Gleitflächenpaarungen. To obtain optimum sliding properties, special relatively high molecular weight plastic sliders, such as hard polyethylene (e.g., PE1000), are used which have sufficiently high strength and will not injure the PTFE-containing sliding liner of the guide tube. Due to the increased temperature and also pressure stresses PTFE components are firmly embedded in the fine depressions and molecular gaps of the roughened tube surface, whereby durable sliding and emergency running properties are achieved even if a large part of the friction lining rubbed off by the movements of the guide tube on the sliding elements Has.
Im folgenden wird ein Ausführungsbeispiel der erfindungsgemäßen Hubstempelanordnung anhand der schematischen Schnittzeichnung ausführlicher beschrieben.In the following an embodiment of the Hubstempelanordnung invention will be described in more detail with reference to the schematic sectional drawing.
Die Zeichnung zeigt im schematischen Axialschnitt den oberen Teil eines Hubstempels 1, der ein vertikales Führungsrohr 2 von hier quadratischem Querschnitt sowie eine in dessen Innerem koaxial eingebaute Kolben-Zylinder-Einheit 3 als Hubaggregat enthält. Die Kolben-Zylinder-Einheit 3 hat einen auf einer - nicht dargestellten - unteren Basis befestigten ortsfesten Kolben 4 und ein vertikal auf dem Kolben 4 verschiebbares Zylindergehäuse 5, dessen oberes Ende in einem dickwandigen Plattenelement 6 festgelegt ist, das mit dem Endteil des Führungsrohrs 2 fest verbunden ist. Auf der durch eine spezielle Behandlung, z.B. durch Sandstrahlen, aufgerauhten von jeglicher Verschmutzung freien Außenfläche des Führungsrohrs 2 ist dauerhaft und fest ein reibungsarmer und abriebfester Gleitbelag 7 aus einem PTFE-haltigen Kunststoffmaterial festhaftend angeordnet.The drawing shows a schematic axial section of the upper part of a
Zum Aufbringen dieses Gleitbelages wird die Außenfläche des Führungsrohrs sorgfältig gereinigt und entfettet sowie anschließend zum Aufrauhen sandgestrahlt. Unter Vermeidung jeglicher erneuter Verunreinigungen wird auf diese Oberfläche dann ein PTFE-Schmierfilm z.B. durch Aufsprühen aufgebracht und durch eine vorzugsweise in einem Ofen ausgeführte Wärmebehandlung von 230 °C ausgehärtet.To apply this sliding coating, the outer surface of the guide tube is carefully cleaned and degreased and then sandblasted for roughening. By avoiding any re-contamination, a PTFE lubricating film is then applied to this surface e.g. applied by spraying and cured by a preferably carried out in a furnace heat treatment of 230 ° C.
Der vorstehend beschriebene Hubstempel ist in einer ortsfesten Führungsmanschette 10 geführt, die beim dargestellten Ausführungsbeispiel mit dem Vierkant-Führungsrohr 2 entweder zwei oder vier diametral gegenüberliegende formsteife Platten 11 aufweist. Diese Platten 11 sind an der Unterseite einer tragfesten Bodenplatte 12 dauerhaft z.B. durch Schweißen befestigt, welche einen Teil der im Boden verlegten Tragkonstruktion der Hebebühne darstellt. Im oberen Endteil jeder Platte 11 ist axial zwischen der Bodenplatte 12 und einem angeschweißten Haltesteg 13 eine Druckplatte 14 und ein innenseitiges plattenförmiges Gleitelement 15 festgelegt, dessen innere Kontaktfläche mit dem Gleitbelag 7 auf der Außenfläche des Führungsrohrs 2 eine Gleitflächenpaarung bildet. Beim dargestellten Ausführungsbeispiel mit Vierkant-Führungsrohr 2 sind vorzugsweise acht gleiche plattenförmige Gleitelemente 15 - für jede Rohrseite zwei Gleitelemente 15 - vorgesehen, die jeweils aus einem ggf. mit Füllstoffen versehenen harten Polyethylen-Werkstoff bestehen.The lifting piston described above is guided in a
Am unteren Endbereich jeder Platte 11 sind ein unterer Haltesteg 16 und ein unterster Verstärkungskragen 17 zur Stabilisierung der Führungsmanschette befestigt, die zur Fixierung einer unteren Druckplatte 18 sowie von zwei plattenförmigen Gleitelementen 19 dienen. Die unteren Gleitelemente 19 bestehen aus dem gleichen Material wie die oberen Gleitelemente 15 und sind wie diese jeweils paarweise an jeder Rohrseite angeordnet. Zur genauen Fixierung der unteren und oberen Gleitelemente 15 und 19 sowie zur Einstellung des Spalts zwischen dem Führungsrohr und den jeweiligen Gleitelementen 15, 19 sind obere und untere Schrauben 20, 21 vorgesehen, die auf die zugehörige Druckplatte 14, 18 und durch diese auf die Gleitelemente 15, 19 einen definierten Druck ausüben können.At the lower end region of each
Der Vollständigkeit halber sei noch darauf hingewiesen, daß auf der Oberseite des Führungsrohrs 2 die bei Hebebühnen üblichen Tragkonstruktionen für die anzuhebenden Vorrichtungen, insbesondere für verschiedenartige Fahrzeugtypen, montiert sind.For the sake of completeness it should be noted that on the top of the
Die Erfindung ist nicht auf das dargestellte Ausführungsbeispiel beschränkt, sondern umfaßt auch verschiedene Varianten der vorstehend beschriebenen Einzelheiten. Beispielsweise können die Gleitelemente 15, 19 nicht durchgehend aus dem Kunststoffmaterial bestehen, sondern lediglich mit einer solchen Beschichtung von geeigneter Wandstärke versehen sein. Die Positionierung und Fixierung dieser Gleitelemente in der das Rohrstück enthaltenden Führungsmanschette kann auch auf andere geeignete Weise erfolgen. Darüber hinaus können die Führungsrohre einen nahezu beliebigen Querschnitt, mehreckig, oval oder kreisrund, haben und auch aus einem anderen geeigneten ausreichend steifen und tragfähigen Werkstoff als Stahl bestehen.The invention is not limited to the illustrated embodiment, but also includes various variants of the details described above. For example, the
Claims (6)
- A lifting piston assembly for lifting platforms, comprising- a dimensionally stable guiding tube (2) capable of being raised and lowered, on the top end of which supporting members, for example for an automotive, are attached,- a driving unit (3) coupled to said guiding tube (2) in order to raise and lower said tube and- a stationary guiding collar (10) the sliding elements (15, 19) of which fit to said guiding tube (2), wherein- said guiding tube (2) is stickingly coated with a low-friction abrasion-resistant slideway lining (7) made of a plastic material containing PTFE,characterized in that- said sliding elements (15, 19) consist of a non-deformable hard material on the basis of polyamide or polyethylene.
- The lifting piston assembly according to claim 1,
characterized in that
said guiding tube (2) consists of steel to the purified and roughened surface of which said slightway lining (7) is permanently and stickingly connected after a heat-treatment. - The lifting piston assembly according to one of the preceding claims,
characterized in that
said slightway lining (7) has a layer thickness from 10 to 50 µm. - The lifting piston assembly according to one of the preceding claims,
characterized in that
said guiding tube (2) has a circular, oval or polygonal cross-section. - The lifting piston assembly according to one of the preceding claims,
characterized in that
said sliding elements (15, 19) attached inside of said guiding collar (10) are formed in the shape of a ring for round tubes and in the shape of a plate for multiple-cornered tubes. - The lifting piston assembly according to one of the preceding claims,
characterized in that
said driving unit (3) comprises at least one hydraulic piston-and-cylinder unit (4, 5) arranged inside or outside of said guiding tube (2) the stationary piston rod (4) of which abuts on a lower base and the cylinder housing (5) of which capable of being raised and lowered is fixedly connected to the top end of said guiding tube (2) via a massive plate element (6).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20202362U | 2002-02-15 | ||
| DE20202362U DE20202362U1 (en) | 2002-02-15 | 2002-02-15 | Lifting ram arrangement for lifting platforms |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1336586A2 EP1336586A2 (en) | 2003-08-20 |
| EP1336586A3 EP1336586A3 (en) | 2004-01-07 |
| EP1336586B1 true EP1336586B1 (en) | 2010-05-05 |
Family
ID=7967841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03002099A Expired - Lifetime EP1336586B1 (en) | 2002-02-15 | 2003-01-30 | Lifting cylinder arrangement for lifting platforms |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7028987B2 (en) |
| EP (1) | EP1336586B1 (en) |
| AT (1) | ATE466811T1 (en) |
| DE (2) | DE20202362U1 (en) |
| DK (1) | DK1336586T3 (en) |
| ES (1) | ES2345769T3 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005050990B4 (en) * | 2005-10-25 | 2010-02-11 | Herrmann, Johannes | Lifting ram for lifting platforms and lifting platform |
| CN102275593B (en) * | 2010-06-11 | 2015-03-04 | 北京铁道工程机电技术研究所有限公司 | Pit type train lifting jack of high-speed multiple unit |
| ES2582981B1 (en) * | 2016-02-08 | 2017-06-21 | Transports De Barcelona, S.A. | Sliding for lifting horizontal structures. |
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| US6006259A (en) * | 1998-11-20 | 1999-12-21 | Network Alchemy, Inc. | Method and apparatus for an internet protocol (IP) network clustering system |
| US6490632B1 (en) * | 1999-03-18 | 2002-12-03 | 3Com Corporation | High performance load balancing and fail over support of internet protocol exchange traffic over multiple network interface cards |
| US6567377B1 (en) * | 1999-03-18 | 2003-05-20 | 3Com Corporation | High performance load balancing of outbound internet protocol traffic over multiple network interface cards |
| US6560630B1 (en) * | 1999-03-18 | 2003-05-06 | 3Com Corporation | Receive load balancing and fail over with multiple network interface cards |
| DE20003062U1 (en) | 2000-02-19 | 2000-06-08 | Herrmann Johannes | Lift |
| US6411506B1 (en) * | 2000-07-20 | 2002-06-25 | Rlx Technologies, Inc. | High density web server chassis system and method |
| DE20102352U1 (en) * | 2001-02-10 | 2001-07-05 | Blitz M Schneider Werkzeug Und | Stamp lifting platform with several surface-treated lifting cylinders |
| DE20106513U1 (en) | 2001-04-14 | 2001-08-02 | Herbert Gruettner Gmbh & Co Kg | Telescopic column, in particular for lifting tables or the like. |
-
2002
- 2002-02-15 DE DE20202362U patent/DE20202362U1/en not_active Expired - Lifetime
-
2003
- 2003-01-30 EP EP03002099A patent/EP1336586B1/en not_active Expired - Lifetime
- 2003-01-30 DE DE50312680T patent/DE50312680D1/en not_active Expired - Lifetime
- 2003-01-30 DK DK03002099.4T patent/DK1336586T3/en active
- 2003-01-30 ES ES03002099T patent/ES2345769T3/en not_active Expired - Lifetime
- 2003-01-30 AT AT03002099T patent/ATE466811T1/en active
- 2003-02-13 US US10/366,927 patent/US7028987B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1336586A3 (en) | 2004-01-07 |
| ATE466811T1 (en) | 2010-05-15 |
| DE50312680D1 (en) | 2010-06-17 |
| DK1336586T3 (en) | 2010-08-30 |
| DE20202362U1 (en) | 2002-04-18 |
| US20030155561A1 (en) | 2003-08-21 |
| EP1336586A2 (en) | 2003-08-20 |
| ES2345769T3 (en) | 2010-10-01 |
| US7028987B2 (en) | 2006-04-18 |
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