EP0816281A1 - Lifting platform for vehicles - Google Patents

Lifting platform for vehicles Download PDF

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Publication number
EP0816281A1
EP0816281A1 EP97103203A EP97103203A EP0816281A1 EP 0816281 A1 EP0816281 A1 EP 0816281A1 EP 97103203 A EP97103203 A EP 97103203A EP 97103203 A EP97103203 A EP 97103203A EP 0816281 A1 EP0816281 A1 EP 0816281A1
Authority
EP
European Patent Office
Prior art keywords
drive motor
lifting
lift according
column
drive
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.)
Granted
Application number
EP97103203A
Other languages
German (de)
French (fr)
Other versions
EP0816281B1 (en
Inventor
Hans Dipl.-Ing. Nussbaum
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Otto Nussbaum GmbH and Co KG
Original Assignee
Otto Nussbaum GmbH and Co KG
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 Otto Nussbaum GmbH and Co KG filed Critical Otto Nussbaum GmbH and Co KG
Publication of EP0816281A1 publication Critical patent/EP0816281A1/en
Application granted granted Critical
Publication of EP0816281B1 publication Critical patent/EP0816281B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B66F7/02—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms suspended from ropes, cables, or chains or screws and movable along pillars
    • B66F7/025—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms suspended from ropes, cables, or chains or screws and movable along pillars screw operated

Definitions

  • the invention relates to a lifting platform for motor vehicles, consisting of at least one lifting column, the one that Vehicle supporting lifting element that carries vertically is movably mounted in the lifting column and its lifting movement generated by an electric drive motor is, in particular by means of a vertical, in the Pillar-mounted spindle, driven by the drive motor is rotated and with a nut the vertically movable lifting element is engaged.
  • Such lifts are in numerous embodiments known. They usually consist of two opposing ones Pillars, each pillar as a lifting element two has telescopic swivel name that under the vehicle swung between the columns and under the intended jacking points of the vehicle be positioned.
  • the invention also relates to such lifts, where the lifting elements as ramps or are designed as a continuous platform.
  • the drive is not hydraulic but is done by an electric motor this drive motor is flanged to the side of the lifting columns and stands over an intermediate gear with the mentioned spindle or another lifting device for Generation of the desired lifting movement in connection.
  • the present invention is based on the object the known lifts of the type described above continue to improve, in particular to build more cost-effectively, but also to make it more compact.
  • the motor shaft is not used as usual To equip V-belt pulleys for the V-belt drive, but a sleeve with an outer axial groove profile or with circumferential grooves to attach to the motor shaft and one as a drive belt serrated belt with matching the groove profile Tooth pitch to use.
  • the groove profile is a further development of this idea not in the form of a separate sleeve, but through direct Material removal generated in the motor shaft itself. In these cases, it is particularly suitable as a drive belt a so-called poly-V belt.
  • Another advantageous embodiment of the invention is that there is no conventional drive motor but a case-less open motor is used. This gives further advantages in terms of Cost and dimensions.
  • the motor it is recommended to place it at the top of the column, especially flanged to the top cover of the column.
  • the free end of the motor shaft after directed above so that the belt connection to the spindle or the corresponding drive element after acceptance of an upper housing cover immediately accessible becomes.
  • FIG vertical lifting columns 1 and 2 With their base plate 1a and 2a are attached to the workshop floor.
  • Each Lifting column carries two horizontally swiveling and telescopically extendable support arms 3 and 4, the under the prescribed support points of the vehicle can be.
  • These arms are each guided vertically in its lifting column, in the embodiment by a lifting spindle 5, which is shown in FIG 2 and 3 is visible.
  • This lifting spindle can be rotated in stored their pillar and stands with an invisible Mother engaged, which in turn with the support arms 3 or 4 is connected.
  • the lift has the conventional structure. On the description the further details, especially the leadership the mother, not shown, and the whole Control is therefore dispensed with.
  • Figures 1 and 3 also show a cable bridge 11, in the control lines for switching on and off as well as for the synchronism of the lift. They are with the usual electrical or electronic Connected components that are also within the columns are arranged.

Abstract

The drive motor (6) for the vehicle lift is located completely inside the lifting struts (1,2) with the axis of the shaft vertical. The drive motor is connected without an intermediate gear and only through a drive belt (8) to the spindle (5) or corresponding drive element. A channel profile is in the form of a sleeve, or produced directly on the free end of the drive motor shaft. Torque transmission is effected via a toothed belt (8) with a tooth spacing conforming to the channel profile.

Description

Die Erfindung betrifft eine Hebebühne für Kraftfahrzeuge, bestehend aus zumindest einer Hubsäule, die ein das Fahrzeug unterfassendes Hubelement trägt, das vertikal verfahrbar in der Hubsäule gelagert ist und dessen Hubbewegung durch einen elektrischen Antriebsmotor erzeugt wird, insbesondere mittels einer vertikalen, in der Säule diehbar gelagerten Spindel, die von dem Antriebs-motor in Drehung versetzt wird und über eine Mutter mit dem vertikal verfahrbaren Hubelement in Eingriff steht.The invention relates to a lifting platform for motor vehicles, consisting of at least one lifting column, the one that Vehicle supporting lifting element that carries vertically is movably mounted in the lifting column and its lifting movement generated by an electric drive motor is, in particular by means of a vertical, in the Pillar-mounted spindle, driven by the drive motor is rotated and with a nut the vertically movable lifting element is engaged.

Derartige Hebebühnen sind in zahlreichen Ausführungsformen bekannt. Meist bestehen sie aus Zwei gegenüberstehenden Säulen, wobei jede Säule als Hubelement zwei teleskopierbare Schwenkame aufweist, die unter das zwischen den Säulen stehende Fahrzeug geschwenkt und unter den vorgesehenen Aufbockpunkten des Fahrzeuges positioniert werden.Such lifts are in numerous embodiments known. They usually consist of two opposing ones Pillars, each pillar as a lifting element two has telescopic swivel name that under the vehicle swung between the columns and under the intended jacking points of the vehicle be positioned.

Die Erfindung bezieht sich aber auch auf solche Hebebühnen, bei denen die Hubelemente als Auffahrschienen oder als durchgehende Plattform ausgebildet sind.The invention also relates to such lifts, where the lifting elements as ramps or are designed as a continuous platform.

Soweit bei diesen Bauformen der Antrieb nicht hydraulisch sondern durch einen Elektromotor erfolgt, ist dieser Antriebsmotor seitlich an den Hubsäulen angeflanscht und steht über ein Zwischengetriebe mit der genannten Spindel oder einem anderen Huborgan zur Erzeugung der gewünschten Hubbewegung in Verbindung.As far as with these designs, the drive is not hydraulic but is done by an electric motor this drive motor is flanged to the side of the lifting columns and stands over an intermediate gear with the mentioned spindle or another lifting device for Generation of the desired lifting movement in connection.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, die bekannten Hebebühnen der vorbeschriebenen Art weiter zu verbessern, insbesondere den Aufbau kostengünstiger, aber auch kompakter zu gestalten.The present invention is based on the object the known lifts of the type described above continue to improve, in particular to build more cost-effectively, but also to make it more compact.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Antriebsmotor nicht mehr wie bisher außerhalb der Hubsäule angeordnet ist, sondern vollständig in der Hubsäule integriert ist. Man erhält dadurch einen glatten äußeren Verlauf der Säulen ohne vorstehende Teile. Gleichzeitig erhält man beim Transport wie auch beim Betrieb einen hervorragenden Schutz des Motors gegenüber Beschädigungen.This object is achieved in that the drive motor is no longer outside of the Lift column is arranged, but completely in the Lifting column is integrated. This gives you a smooth one outer course of the columns without protruding parts. At the same time, you receive both the transport and the Operation against excellent protection of the engine Damage.

Besonders günstig ist es, wenn der Antriebsmotor mit vertikaler Wellenachse in die Hubsäule eingebaut wird und ohne Zwischengetriebe nur durch einen Treibriemen mit der Spindel oder einem entsprechenden Antriebselement verbunden ist. Man erhält dadurch eine sehr kompakte Anordnung, so daß der Motor in die bisher üblichen Hubsäulen hineinpaßt, ohne deren Abmessungen zu vergrößern.It is particularly favorable if the drive motor with vertical shaft axis is installed in the lifting column and without an intermediate gear, only with a drive belt with the spindle or a corresponding drive element connected is. This gives a very compact Arrangement so that the engine in the usual Fits lifting columns without reducing their dimensions enlarge.

Aus den gleichen Gründen hat es sich als zweckmäßig erwiesen, die Motorwelle nicht wie sonst üblich mit Keilriemenscheiben für den Keilriementrieb zu bestükken, sondern eine Hülse mit einem äußeren Axialrillenprofil oder mit in Umfangsrichtung laufenden Rillen an der Motorwelle anzubringen und als Treibriemen einen gezahnten Riemen mit zu dem Rillenprofil passender Zahnteilung zu verwenden. In besonders zweckmäßiger Weiterbildung dieses Gedankens wird das Rillenprofil nicht in Form einer separaten Hülse, sondern durch direkten Materialabtrag in der Motorwelle selbst erzeugt. Als Treibriemen eignet sich in diesen Fällen vor allem ein sogenannter Poly-V-Riemen.For the same reasons, it has proven useful proved that the motor shaft is not used as usual To equip V-belt pulleys for the V-belt drive, but a sleeve with an outer axial groove profile or with circumferential grooves to attach to the motor shaft and one as a drive belt serrated belt with matching the groove profile Tooth pitch to use. In a particularly useful way The groove profile is a further development of this idea not in the form of a separate sleeve, but through direct Material removal generated in the motor shaft itself. In these cases, it is particularly suitable as a drive belt a so-called poly-V belt.

Eine weitere vorteilhafte Ausgestaltung der Erfindung besteht darin, daß kein herkömmlicher Antriebsmotor sondern ein gehäuseloser offener Motor verwendet wird. Dadurch ergeben sich weitere Vorteile hinsichtlich der Kosten und der Abmessungen.Another advantageous embodiment of the invention is that there is no conventional drive motor but a case-less open motor is used. This gives further advantages in terms of Cost and dimensions.

Hinsichtlich der Positionierung des Motors empfiehlt es sich, ihn am oberen Säulenende anzuordnen, insbesondere am oberen Abschlußdeckel der Säule anzuflanschen. Vorzugsweise ist dabei das freie Ende der Motorwelle nach oben gerichtet, so daß die Riemenverbindung zur Spindel bzw. einem dem entsprechenden Antriebselement nach Abnahme eines oberen Gehäusedeckels sofort zugänglich wird.Regarding the positioning of the motor, it is recommended to place it at the top of the column, especially flanged to the top cover of the column. Preferably is the free end of the motor shaft after directed above so that the belt connection to the spindle or the corresponding drive element after acceptance of an upper housing cover immediately accessible becomes.

Schließlich empfiehlt es sich, auch die elektrische Steuerung der Hebebühne, alle Endschalter für die Begrenzung des Hubweges sowie die Relais und übrigen elektrischen Bauteile innerhalb der Hubsäule anzuordnen, so daß der bisher übliche äußere Schaltkasten sowie alle vorstehenden Abdeckungen und dergleichen entfallen. Diese Bauteile sind ebenso wie die Spindel durch ein leicht abnehmbares Abdeckblech, das seitlich an der Säule angeordnet ist, zugänglich. Finally, it is also recommended to use the electrical one Control of the lift, all limit switches for the Limitation of the stroke as well as the relays and others to arrange electrical components within the lifting column, so that the usual external control box as well as all of the above covers and the like omitted. These components are just like the spindle due to an easily removable cover plate, which is on the side is arranged on the column, accessible.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels anhand der Zeichnung; dabei zeigt

Figur 1
ein Schrägbild einer erfindungsgemäßen Hebebühne;
Figur 2
eine Hubsäule mit nach oben herausgezogenem Antriebsmotor und
Figur 3
eine vergrößerte Darstellung des Ausschnittes X in Figur 2
Further features and advantages of the invention will become apparent from the following description of an embodiment with reference to the drawing; shows
Figure 1
an oblique view of a lifting platform according to the invention;
Figure 2
a lifting column with the drive motor pulled upwards and
Figure 3
an enlarged view of the detail X in Figure 2

Man erkennt in Figur 1 zwei einander gegenüberstehende vertikale Hubsäulen 1 und 2, die mit ihrer Grundplatte 1a bzw. 2a auf dem Werkstattboden befestigt sind. Jede Hubsäule trägt zwei horizontal verschwenkbare und teleskopartig ausfahrbare Tragarme 3 bzw. 4, die unter den vorgeschriebenen Auflagerpunkten des Fahrzeuges positioniert werden können. Diese Tragarme sind jeweils vertikal verfahrbar in ihrer Hubsäule geführt, im Ausführungsbeispiel durch eine Hubspindel 5, die in Figur 2 und 3 sichtbar ist. Diese Hubspindel ist drehbar in ihrer Säule gelagert und steht mit einer nicht sichtbaren Mutter in Eingriff, die ihrerseits mit den Tragarmen 3 bzw. 4 verbunden ist. Insoweit weist die Hebebühne den herkömmlichen Aufbau auf. Auf die Beschreibung der weiteren Einzelheiten, insbesondere die Führung der nicht dargestellten Mutter und der gesamten Steuerung wird daher verzichtet.One can see two opposite one another in FIG vertical lifting columns 1 and 2 with their base plate 1a and 2a are attached to the workshop floor. Each Lifting column carries two horizontally swiveling and telescopically extendable support arms 3 and 4, the under the prescribed support points of the vehicle can be. These arms are each guided vertically in its lifting column, in the embodiment by a lifting spindle 5, which is shown in FIG 2 and 3 is visible. This lifting spindle can be rotated in stored their pillar and stands with an invisible Mother engaged, which in turn with the support arms 3 or 4 is connected. In this respect, the lift has the conventional structure. On the description the further details, especially the leadership the mother, not shown, and the whole Control is therefore dispensed with.

Wesentlich ist, daß der Antriebsmotor 6 jeweils innerhalb seiner Hubsäule mit vertikal verlaufender Wellenachse positioniert ist, und zwar in Richtung zu einer Säulenecke hin versetzt, so daß er neben der Hubspindel 5 noch Platz in der Hubsäule findet. Er ist an seinem oberen Ende an einen Abschlußdeckel 7 angeflanscht, der seinerseits das obere Ende verschließt. Seine Motorwelle durchguert diesen Abschlußdeckel 7 und steht oberhalb desselben mit seinem gezahnten Wellenende 6a über einen Poly-V-Zahnriemen 8 mit einer Riemenscheibe 9 der Hubspindel 5 in Verbindung. Die Hubspindel 5 ist an ihrem oberen Ende ebenfalls in diesem Abschlußdeckel 7 und an ihrem unteren Ende am Säulenfuß gelagert.It is essential that the drive motor 6 within each its lifting column with a vertical shaft axis is positioned, towards one Column corner offset so that it is next to the lifting spindle 5 still finds space in the lifting column. He is at his flanged the upper end to a cover 7, the in turn closes the upper end. His motor shaft runs through this end cover 7 and is above the same with its toothed shaft end 6a a poly-V timing belt 8 with a pulley 9 Lifting spindle 5 in connection. The lifting spindle 5 is on its upper end also in this cover 7th and stored at its lower end on the column base.

Durch einen oberen Gehäusedeckel 10, der in Figur 3 sichtbar ist, wird der Riementrieb gegenüber der Umgebung verschlossen.Through an upper housing cover 10, which is shown in FIG the belt drive is visible to the surroundings locked.

Schließlich zeigen die Figuren 1 und 3 noch eine Kabelbrücke 11, in der Steuerleitungen für das An- und Abschalten sowie für den Gleichlauf der Hebebühne verlaufen. Sie sind mit den üblichen elektrischen bzw. elektronischen Bauteilen verbunden, die ebenfalls innerhalb der Säulen angeordnet sind.Finally, Figures 1 and 3 also show a cable bridge 11, in the control lines for switching on and off as well as for the synchronism of the lift. They are with the usual electrical or electronic Connected components that are also within the columns are arranged.

Claims (10)

Hebebühne für Kraftfahrzeuge, bestehend aus zumindest einer Hubsäule (1, 2), die ein das Fahrzeug unterfassendes Hubelement (3, 4) trägt, das vertikal verfahrbar in der Hubsäule (1, 2) gelagert ist und dessen Hubbewegung durch einen elektrischen Antriebsmotor (6) erzeugt wird, insbesondere mittels einer vertikalen, in der Säule (1, 2) drehbar gelagerten Spindel (5), die von dem Antriebsmotor (6) in Drehung versetzt wird und über eine Mutter mit dem vertikal verfahrbaren Hubelement (3, 4) in Eingriff steht,
dadurch gekennzeichnet,
daß der Antriebsmotor (6) vollständig innerhalb der Hubsäule (1, 2) angeordnet ist.Lifting platform for motor vehicles, consisting of at least one lifting column (1, 2), which carries a lifting element (3, 4) under the vehicle, which is vertically movable in the lifting column (1, 2) and whose lifting movement is carried out by an electric drive motor (6 ) is generated, in particular by means of a vertical spindle (5) rotatably mounted in the column (1, 2), which is set in rotation by the drive motor (6) and via a nut with the vertically movable lifting element (3, 4) Intervention stands,
characterized,
that the drive motor (6) is arranged entirely within the lifting column (1, 2). Hebebühne nach Anspruch 1,
dadurch gekennzeichnet,
daß der Antriebsmotor (6) mit vertikaler Wellenachse in die Hubsäule (1, 2) eingebaut ist.Lift according to claim 1,
characterized,
that the drive motor (6) is installed with a vertical shaft axis in the lifting column (1, 2). Hebebühne nach Anspruch 1,
dadurch gekennzeichnet, daß der Antriebsmotor (6) ohne Zwischengetriebe nur durch einen Treibriemen (8) mit der Spindel (5) oder einem entsprechenden Antriebselement verbunden ist. Lift according to claim 1,
characterized in that the drive motor (6) is connected to the spindle (5) or a corresponding drive element only by a drive belt (8) without an intermediate gear. Hebebühne nach Anspruch 1,
dadurch gekennzeichnet,
daß ein Rillenprofil in Form einer Hülse oder direkt auf das freie Ende der Welle des Antriebsmotors aufgebracht ist und daß die Drehmomentübertragung durch einen Zahnriemen (8) mit zu dem Rillenprofil passender Zahnteilung erfolgt.Lift according to claim 1,
characterized,
that a grooved profile in the form of a sleeve or is applied directly to the free end of the shaft of the drive motor and that the torque is transmitted by a toothed belt (8) with tooth pitch matching the grooved profile. Hebebühne nach Anspruch 3,
dadurch gekennzeichnet,
daß der Treibriemen (8) einen Poly-V-Riemen ist.Lift according to claim 3,
characterized,
that the drive belt (8) is a poly-V belt. Hebebühne nach Anspruch 1,
dadurch gekennzeichnet,
daß der Antriebsmotor (6) als gehäuseloser offener Motor ausgebildet ist.Lift according to claim 1,
characterized,
that the drive motor (6) is designed as a housing-free open motor. Hebebühne nach Anspruch 1,
dadurch gekennzeichnet,
daß der Antriebsmotor (6) am oberen Säulenende angeordnet ist.Lift according to claim 1,
characterized,
that the drive motor (6) is arranged at the upper end of the column. Hebebühne nach Anspruch 7,
dadurch gekennzeichnet,
daß der Antriebsmotor (6) an einem oberen Abschlußdekkel der Säule aufgehängt ist, derart, daß das freie Ende (6a) seiner Motorwelle nach oben gerichtet ist.Lift according to claim 7,
characterized,
that the drive motor (6) is suspended from an upper end cover of the column, such that the free end (6a) of its motor shaft is directed upwards. Hebebühne nach Anspruch 1,
dadurch gekennzeichnet,
daß zusätzlich die Endschalter und die elektrische Steuerung der Hebebühne innerhalb der Hubsäule (1, 2) untergebracht sind.Lift according to claim 1,
characterized,
that in addition the limit switches and the electrical control of the lift are housed within the lifting column (1, 2). Hebebühne nach Anspruch 1,
dadurch gekennzeichnet,
daß die Hubsäulen (1, 2) an zumindest einer Seite abnehmbare vertikale Abdeckbleche (1a, 1b) aufweisen.Lift according to claim 1,
characterized,
that the lifting columns (1, 2) have removable cover plates (1a, 1b) on at least one side.
EP97103203A 1996-07-01 1997-02-27 Lifting platform for vehicles Expired - Lifetime EP0816281B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29611390U DE29611390U1 (en) 1996-07-01 1996-07-01 Lift for motor vehicles
DE29611390U 1996-07-01

Publications (2)

Publication Number Publication Date
EP0816281A1 true EP0816281A1 (en) 1998-01-07
EP0816281B1 EP0816281B1 (en) 2001-09-05

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EP97103203A Expired - Lifetime EP0816281B1 (en) 1996-07-01 1997-02-27 Lifting platform for vehicles

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EP (1) EP0816281B1 (en)
DE (2) DE29611390U1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020200268A1 (en) 2020-01-10 2021-07-15 Maha Maschinenbau Haldenwang Gmbh & Co. Kg Guide device for a connecting line of a lifting platform for motor vehicles and lifting platform for motor vehicles
CN112744738B (en) * 2021-01-04 2022-07-29 东风汽车股份有限公司 Two-column lifting machine capable of preventing falling

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1373217A (en) * 1963-08-23 1964-09-25 Transportable lifting device with jacks in garages, in particular for automobiles, electrically operated
GB1084127A (en) * 1965-06-28 1967-09-20 Laycock Eng Ltd Improvements in load-lifting apparatus
DE2311845A1 (en) * 1973-03-09 1974-10-10 Rietbergwerke Kg CONVEYOR DEVICE, IN PARTICULAR FOR LIFTING LOADS
DE2403633A1 (en) * 1974-01-25 1975-07-31 Rietbergwerke Kg Vehicle platform lifting mechanism - has thrust carriage nut of low-friction non-locking type with separate automatic brake
GB1478512A (en) * 1974-06-28 1977-07-06 Gkn Transmissions Ltd Lifting apparatus
US5248022A (en) * 1990-11-28 1993-09-28 Tokyo Electron Limited Driving device having sealing mechanism

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3008626A1 (en) * 1979-03-06 1980-09-11 Pedersen H E H CAR LIFT
NL9200688A (en) * 1992-04-14 1993-11-01 Stertil Bv SAFETY ROD DEVICE.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1373217A (en) * 1963-08-23 1964-09-25 Transportable lifting device with jacks in garages, in particular for automobiles, electrically operated
GB1084127A (en) * 1965-06-28 1967-09-20 Laycock Eng Ltd Improvements in load-lifting apparatus
DE2311845A1 (en) * 1973-03-09 1974-10-10 Rietbergwerke Kg CONVEYOR DEVICE, IN PARTICULAR FOR LIFTING LOADS
DE2403633A1 (en) * 1974-01-25 1975-07-31 Rietbergwerke Kg Vehicle platform lifting mechanism - has thrust carriage nut of low-friction non-locking type with separate automatic brake
GB1478512A (en) * 1974-06-28 1977-07-06 Gkn Transmissions Ltd Lifting apparatus
US5248022A (en) * 1990-11-28 1993-09-28 Tokyo Electron Limited Driving device having sealing mechanism

Also Published As

Publication number Publication date
EP0816281B1 (en) 2001-09-05
DE29611390U1 (en) 1996-08-14
DE59704512D1 (en) 2001-10-11

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