EP0325726A1 - Blockable lifting device for the stepless adjustment of furniture parts, and guiding bush for such a lifting device - Google Patents

Blockable lifting device for the stepless adjustment of furniture parts, and guiding bush for such a lifting device Download PDF

Info

Publication number
EP0325726A1
EP0325726A1 EP88119734A EP88119734A EP0325726A1 EP 0325726 A1 EP0325726 A1 EP 0325726A1 EP 88119734 A EP88119734 A EP 88119734A EP 88119734 A EP88119734 A EP 88119734A EP 0325726 A1 EP0325726 A1 EP 0325726A1
Authority
EP
European Patent Office
Prior art keywords
guide
lifting device
tube
sleeve
axially
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
EP88119734A
Other languages
German (de)
French (fr)
Other versions
EP0325726B1 (en
Inventor
Hans-Peter Bauer
Hans Jürgen Bauer
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.)
Suspa Compart AG
Original Assignee
Suspa Compart AG
Fritz Bauer and Sohne OHG
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 Suspa Compart AG, Fritz Bauer and Sohne OHG filed Critical Suspa Compart AG
Priority to AT88119734T priority Critical patent/ATE74725T1/en
Publication of EP0325726A1 publication Critical patent/EP0325726A1/en
Application granted granted Critical
Publication of EP0325726B1 publication Critical patent/EP0325726B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B51/00—Cabinets with means for moving compartments up and down
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/30—Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B9/00—Tables with tops of variable height
    • A47B9/10—Tables with tops of variable height with vertically-acting fluid cylinder

Definitions

  • the invention relates to a lockable lifting device according to the preamble of claim 1 and to a guide bush for such a lifting device.
  • the cylindrical outer surface of the housing of the gas spring is guided directly in a guide bush connected to the guide tube.
  • the gas spring is not only a load-bearing and length-adjustable, but also a guiding and rotating element of a chair or table column. Since the piston rod in the base plate of the guide tube is not only freely rotatable, but is also attached radially with sufficient play, the gas spring can align itself according to any changing load directions on the seat or table top, so that the risk of jamming in the guide bushing is small overall .
  • the housing of the gas spring is surrounded by an additional tube in which the housing of the gas spring is arranged axially immovable.
  • This additional tube is rotatably and longitudinally guided in the guide bush (EP-PS 0 133 524 according to JP-GM 60-54446).
  • the guide bushes are formed in one piece and consist of an abrasion-resistant, high-quality material. They are pressed into the guide tubes. Then the guide surface of the bushing, which serves as a sliding surface, is brought to the exact dimension by turning or rubbing it out. This is necessary because the guide bushes have large tolerance dimensions due to their size and because they are deformed differently when they are pressed into the guide tube. This processing is expensive. In addition, the requirement that the guide bush should have good sliding properties, be abrasion-resistant and still be able to be pressed into the guide tube with corresponding hard elastic deformation is difficult to achieve from the material side with one another.
  • DE-GM 72 35 759 From DE-GM 72 35 759 it is known for a lifting device for the continuous adjustment of chair seats to guide a gas spring in two spaced-apart guide bushings, each of which is in turn provided with bearing or guide surfaces.
  • the two guide bushes are pressed into a guide tube and held apart by a spacer tube.
  • a special purpose is not specified in DE-GM 72 35 759.
  • the invention is therefore based on the object, in a blockable lifting device of the generic type, to design the guide bushing in such a way that, on the one hand, a jam-free, abrasion-resistant, sliding-friendly guidance of the gas spring in the guide bushing and, on the other hand, a production of the guide bushing which is favorable in terms of material expenditure is achieved.
  • the measures according to the invention ensure that the sliding bushes can be made from a material that has high abrasion resistance on the one hand and good sliding properties compared to metal on the other.
  • the fact that the sliding bushes are arranged at a distance from one another ensures good tilt-free guidance of the gas spring or of the additional tube surrounding it.
  • the carrying sleeve can only be designed with regard to its ability to be pressed into the guide tube, i.e. In the choice of materials, relatively inexpensive plastics can be used, since abrasion resistance and sliding properties are irrelevant.
  • the sub-claims reflect numerous advantageous configurations of the guide bush.
  • the blockable lifting device shown in the drawing for the stepless adjustment of seats or table tops has a lower guide tube 1, which is essentially cylindrical, but in its lower region has a downwardly conically tapering section 2, which is received in a corresponding hub 3 of a base frame 4 is used.
  • the guide tube 1 is provided in the vicinity of its lower end with a base plate 5 which has an opening 7 which is concentric with the central longitudinal axis 6 of the entire lifting device and thus also with the guide tube 1.
  • a length-adjustable, hydraulically or pneumatically lockable gas spring B is axially parallel to the longitudinal axis 6 .
  • the cylindrical housing 9 is located in the upper region of the guide tube 1 and protrudes upwards from it, while its piston rod 10 projects downwards from the housing 9 and is detachably connected to the base plate 5.
  • the free end of the piston rod 10 is formed with a reduced-diameter pin 11, on which an axial ball bearing 12 is arranged, the upper race 13 of which is supported against the collar 14 formed at the transition between the pin 11 and the piston rod 10, while the lower race 15 is supported against the base plate 5.
  • a locking ring 16 is attached to the pin, which holds the thrust ball bearing 12 in the position shown, even if the lower race 15 is not supported against the base plate 5.
  • the pin 11 passes through the opening 7 with a sufficient radial play of a few tenths of a millimeter to one millimeter, so that the piston rod 10 is not radially clamped relative to the guide tube 1.
  • a washer 17 is pushed onto the pin 11, the diameter of which is larger than the diameter of the opening 7.
  • a securing element 18 is inserted, so that the piston rod 10 of the gas spring 8 is axially fixed but releasable with the guide tube 1 is connected.
  • the continuous circular cylindrical housing 9 of the gas spring 8 is arranged in a tube 20 with a sliding fit, which is also circular cylindrical over its essential length, i.e. the radial play between the housing 9 and the tube 20 is a few hundredths of a millimeter to a maximum of 1 or 2 tenths of a millimeter.
  • the game is just such that the housing 9 of the gas spring 8 can be inserted into or pulled out of the tube 20, but at the same time the housing 9 is guided and held radially in the tube 20.
  • This tube 20 which forms a detachable part of the gas spring 8, is provided in its upper region, which projects beyond the housing 9, with a conically tapering fastening section 21, which is used to produce a fixed, easy-to-produce plug connection with a suitably designed hub 22, which is on the underside of a Chairs, armchairs, a table top or the like. is attached.
  • a sleeve 23 which is designed in accordance with the tapering of the pipe 20 and is thus axially fixed in the direction of the fastening section 21, is arranged in the pipe 20.
  • the housing 9 of the gas spring 8 is supported axially firmly against this sleeve 23.
  • the housing 9 is held axially in the tube 20 by means of a releasable fastening element 24.
  • This can be a so-called claw, that is to say a ring provided with resilient projections, which is relatively easy in one direction, that is to say, until it rests against the housing 9 can be inserted into the tube 20, but opposes an opposite movement in that it clings to the tube like barbs.
  • a sufficient effort for example by means of a screwdriver, it can be easily removed downwards, whereby the connection between the housing 9 and the tube 20 is broken in a simple manner.
  • fasteners including screw connections, are also contemplated.
  • This tube which forms a detachable part of the gas spring 8, is mounted in the usual manner axially displaceably in the guide tube 1, for which purpose this is provided in its upper region with a guide bush 25, which will be described in more detail below.
  • the guide tube 1 and the tube 20 are made of steel.
  • the sleeve 23 consists of a softer material, for example die-cast zinc.
  • Length adjustments of the gas spring 8 and thus height adjustments of the entire lifting device are carried out by actuating an actuating plunger 26 of the gas spring 8 which protrudes from the upper end facing away from the piston rod 10 and which is pressed into the housing 9 to enable the corresponding length adjustments.
  • an upwardly protruding sliding body 27 is arranged in the fastening section 21, which tapers conically upwards and bears with a contact surface 28 against the actuating plunger 26.
  • This sliding body 27 is further provided with retaining fingers 29, which engage resiliently behind a corresponding ring 30 on the sleeve 23, as a result of which the sliding body 27 is secured against the actuating plunger 26 against inadvertent falling out or being pulled out of the fastening section 21 while at the same time largely free of play against the contact surface 28.
  • the actuation is carried out by means of a pivotable actuating lever, not shown, which is mounted in the hub 22 in the usual way and which comes into contact with the outer surface of the sliding body 27, as is known, for example, from DE-GM 70 19 918 (corresponding to US Pat. No. 3,790,119). is known.
  • the gas spring 8 does not necessarily have to be arranged in an additional cylindrical tube 20; it can also be guided directly with its housing in the guide bush 25 and the like on the underside of a chair seat, a table top. be attached. This is known, for example, from DE-PS 19 37 012, which corresponds to US Pat. No. 3,711,054 or JP-PS 892 209, to which reference is made.
  • the guide bush 25 is constructed in several parts. It consists of a support tube 31, slide bushings 32, 33 inserted into this and an outer two-part support sleeve 34.
  • the support tube 31 is designed as an annular cylinder and, in particular, has a relatively precise inside diameter Di, that is to say with only small tolerances.
  • the two sliding bushes 32, 33 are of identical design. They have one before being inserted into the support tube 31 Outer diameter there, which is a few hundredths of a millimeter, for example 0.02 to 0.09 mm, larger than the inner diameter Di of the support tube 31.
  • the sliding bushes 32, 33 are inserted into the supporting tube 31 in such a way that a sliding bush 32 or 33 is pressed in from each of their two ends until their collar 35 rests against the corresponding end face 36 of the supporting tube.
  • the two sliding bushings 32, 33 extend over a quarter to one third of the length of the support tube 31, so that between the two sliding bushings 32, 33 there is approximately a third to two quarters of the length of the support tube 31 extending free space 37 is formed.
  • the inside diameter di of the sliding bushes 32, 33 thus corresponds to the outside diameter of the housing of a gas spring or the outside diameter of the tube 20 with the usual guide play.
  • the two-part bushing 34 consists of two half bushes 39, 40 of identical design, each of which has a semicircular cylinder section 41 in its basic form, from which ribs 42 extending outwards parallel to the axis 6 project.
  • the half-sleeves 39.40 have longitudinal flanges 43.44 which lie against each other when joining the two half-sleeves 39.40. They then lie against each other in a plane which is guided through the central longitudinal axis 6.
  • Pins 45 and associated openings 46 are formed on these longitudinal flanges 43, 44, so that when the two half-sleeves 39, 40 are joined together, the pins 45 of one half-sleeve 39, 40 engage in the opening 46 of the other half-sleeve 40 and 39, respectively.
  • a semi-ring-shaped, radially inwardly projecting stop 47 is formed, against which — as can be seen from FIG. 2 — the ring collar 35 of the associated slide bush 32 abuts in the assembled state of the guide bush 25 , so that the support tube 31 with the two sliding bushes 32, 33 is fixed axially in one direction.
  • the support tube 31 is fixed with the two sliding bushes 32, 33 in such a way that an upper, half-ring-shaped stop 48 is formed on the two half-sleeves 39, 40, which also projects radially inward beyond the semicircular cylinder section.
  • the collar 35 of the adjacent sliding bush 33 lies axially.
  • this upper stop 48 is designed to be slightly resilient in the axial direction, so that it can compensate for length tolerances of the support tube 31 with the two sliding bushings 32, 33 on the one hand, and the supporting tube 31 with the two sliding bushings 32, 33, on the other hand, can be adjusted axially free of play and thus also wobble-free.
  • this stop 48 is in each case in the form of a half-ring disk and is guided into the radial outer region of the ribs 42 attached to a half-ring web 49 which projects radially outwards and has an outer diameter which corresponds to the inner diameter of the guide tube 1.
  • this half-ring web 49 and the stop 48 there is also an annular collar 50 which comes into contact with the corresponding end face 51 of the guide tube 1 when the fully assembled guide bush 25 is inserted.
  • the support tube 31 already provided with the sliding bushes 32, 33 is inserted into one of the half bushes 39 and 40, respectively.
  • the other half-sleeve 40 or 39 is then placed against it, the pins 45 engaging in the corresponding openings 46.
  • This fully assembled guide bush 25 is then inserted into the guide tube 1 until the collar 50 rests against the end face 51.
  • the ribs 42 are elastically slightly deformed so that the entire guide bush 25 is seated firmly in the guide tube 1. Since the support tube 31 is practically non-deformable, since it consists of steel or aluminum or a comparable metal, the tolerance-related deformations of the support sleeve 34 do not affect the inner diameter di of the slide bushes 32, 33 and thus not the exact dimensions of the guide surfaces 38.
  • the relatively material-consuming half-sleeves 39, 40 which are each in one piece, can be produced from an inexpensive plastic, for example PPN (polypropylene), while the sliding sleeves 32, 33 from a plastic with particularly good sliding properties compared to metal, in particular Steel.
  • the tube 20 or the housing of a directly guided gas spring consists of metal, in particular steel. Polyacetal is considered to be such a plastic with particularly good sliding properties.
  • the outer diameter Da of the support tube 31 is selected so that it is held in the support sleeve 34 without play.

Abstract

A blockable lifting device for the stepless adjustment of chair seats or the like has a guide pipe (1), in which a longitudinally adjustable, blockable gas spring (8) is displaceably guided. The piston rod (10) of the gas spring (8) is attached to the bottom (5) of the guide pipe (1). The housing (9) of the gas spring (8) is guided in the guide pipe (1) by means of a guiding bush (25) which has a central bearing pipe (31), in which sliding bushes (32, 33) are arranged spaced apart. The bearing pipe (31) is surrounded by a bearing bush (34) which is held in the guide pipe (1). By this means, a gas spring is achieved in the guiding bush, on the one hand, which gas spring is free from jamming, resistant to abrasion and favourable in its sliding properties and, on the other hand, a manufacture of the guiding bush which is favourable in terms of material expenditure. <IMAGE>

Description

Die Erfindung bezieht sich auf eine blockierbare Hub­vorrichtung nach dem Oberbegriff des Anspruches 1 und auf eine Führungsbüchse für eine solche Hubvorrich­tung.The invention relates to a lockable lifting device according to the preamble of claim 1 and to a guide bush for such a lifting device.

Bei einer derartigen aus der DE-PS 19 31 012 (entspre­chend US-PS 3 711 054 und JP-PS 892 209) bekannten Hubvorrichtung wird die insoweit zylindrische Außen­fläche des Gehäuses der Gasfeder unmittelbar in einer mit dem Führungsrohr verbundenen Führungsbüchse ge­führt. Die Gasfeder ist also nicht nur tragendes und längenverstellbares, sondern auch führendes und dreh­bares Element einer Stuhl- oder Tischsäule. Da die Kolbenstange in der Bodenplatte des Führungsrohres nicht nur frei drehbar, sondern auch radial mit einem ausreichenden Spiel befestigt ist, kann sich die Gas­feder entsprechend etwaigen wechselnden Belastungs­richtungen der Sitzfläche bzw. Tischplatte ausrichten, so daß die Gefahr eines Verklemmens in der Führungs­büchse insgesamt klein ist. Bei einer auch unter den Gattungsbegriff des Anspruches 1 fallenden Hubvorrich­tung ist das Gehäuse der Gasfeder von einem zusätzli­chen Rohr umgeben, in dem das Gehäuse der Gasfeder axial unverschiebbar angeordnet ist. Hierbei wird dieses zusätzliche Rohr in der Führungsbüchse drehbar und längsverschieblich geführt (EP-PS 0 133 524 ent­sprechend JP-GM 60-54446).In such a lifting device known from DE-PS 19 31 012 (corresponding to US Pat. No. 3,711,054 and JP-PS 892 209), the cylindrical outer surface of the housing of the gas spring is guided directly in a guide bush connected to the guide tube. The gas spring is not only a load-bearing and length-adjustable, but also a guiding and rotating element of a chair or table column. Since the piston rod in the base plate of the guide tube is not only freely rotatable, but is also attached radially with sufficient play, the gas spring can align itself according to any changing load directions on the seat or table top, so that the risk of jamming in the guide bushing is small overall . In one of the Generic term of claim 1 falling lifting device, the housing of the gas spring is surrounded by an additional tube in which the housing of the gas spring is arranged axially immovable. This additional tube is rotatably and longitudinally guided in the guide bush (EP-PS 0 133 524 according to JP-GM 60-54446).

Bei den bekannten Ausführungen sind die Führungsbüch­sen einstückig ausgebildet und bestehen aus einem abriebfesten hochwertigen Material. Sie werden in die Führungsrohre eingepreßt. Anschließend wird die als Gleitfläche dienende Führungsfläche der Büchse noch auf das genaue Maß gebracht, und zwar durch Ausdrehen oder Ausreiben. Dies ist notwendig, weil die Führungs­büchsen aufgrund ihrer Größe entsprechend große Tole­ranzmaße haben und weil sie beim Einpressen in das Führungsrohr unterschiedlich verformt werden. Diese Bearbeitung ist kostenaufwendig. Darüber hinaus ist die Forderung, daß die Führungsbüchse gute Gleiteigen­schaften haben soll, abriebfest sein soll und sich trotzdem unter entsprechender hartelastischer Verfor­mung in das Führungsrohr einpressen lassen soll, von der Materialseite her nur schwer miteinander reali­sierbar.In the known designs, the guide bushes are formed in one piece and consist of an abrasion-resistant, high-quality material. They are pressed into the guide tubes. Then the guide surface of the bushing, which serves as a sliding surface, is brought to the exact dimension by turning or rubbing it out. This is necessary because the guide bushes have large tolerance dimensions due to their size and because they are deformed differently when they are pressed into the guide tube. This processing is expensive. In addition, the requirement that the guide bush should have good sliding properties, be abrasion-resistant and still be able to be pressed into the guide tube with corresponding hard elastic deformation is difficult to achieve from the material side with one another.

Aus dem DE-GM 72 35 759 ist es für eine Hubvorrichtung zum stufenlosen Verstellen von Stuhlsitzen bekannt, eine Gasfeder in zwei im Abstand voneinander befindli­chen Führungsbüchsen zu führen, die jeweils wiederum mit Lager- bzw. Führungsflächen versehen sind. Die beiden Führungsbüchsen sind in ein Führungsrohr einge­preßt und durch ein Distanzrohr im Abstand voneinander gehalten. Ein besonderer Zweck ist hierzu in dem DE-GM 72 35 759 nicht angegeben.From DE-GM 72 35 759 it is known for a lifting device for the continuous adjustment of chair seats to guide a gas spring in two spaced-apart guide bushings, each of which is in turn provided with bearing or guide surfaces. The two guide bushes are pressed into a guide tube and held apart by a spacer tube. A special purpose is not specified in DE-GM 72 35 759.

Der Erfindung liegt daher die Aufgabe zugrunde, bei einer blockierbaren Hubvorrichtung der gattungsgemäßen Art die Führungsbüchse so auszugestalten, daß einer­seits eine verklemmungsfreie abriebfeste gleitgünstige Führung der Gasfeder in der Führungsbüchse und ande­rerseits eine vom Materialaufwand her günstige Her­stellung der Führungsbüchse erreicht wird.The invention is therefore based on the object, in a blockable lifting device of the generic type, to design the guide bushing in such a way that, on the one hand, a jam-free, abrasion-resistant, sliding-friendly guidance of the gas spring in the guide bushing and, on the other hand, a production of the guide bushing which is favorable in terms of material expenditure is achieved.

Diese Aufgabe wird durch die Merkmale im Kennzeich­nungsteil des Anspruches 1 gelöst. Durch die erfin­dungsgemäßen Maßnahmen wird erreicht, daß die Gleit­buchsen aus einem Material gefertigt werden können, das hohe Abriebfestigkeit einerseits und gute Gleit­eigenschaften gegenüber Metall andererseits aufweist. Dadurch daß die Gleitbuchsen im Abstand voneinander angeordnet sind, wird eine gute verkantungsfreie Füh­rung der Gasfeder bzw. des sie umgebenden zusätzlichen Rohrs erreicht. Andererseits kann die Tragbüchse nur im Hinblick auf ihre Einpreßbarkeit in das Führungs­rohr ausgestaltet werden, d.h. bei der Materialwahl können relativ preiswerte Kunststoffe verwendet wer­den, da Abriebfestigkeit und Gleiteigenschaften keine Rolle spielen. Dadurch daß zwischen den Gleitbuchsen einerseits und der Tragbüchse andererseits ein Trag­rohr aus Metall angeordnet ist, wirken sich Verfor­mungen der Tragbüchse beim Einpressen in das Füh­rungsrohr nicht auf die Maße und die Form der Füh­rungsflächen der Gleitbuchsen aus.This object is achieved by the features in the characterizing part of claim 1. The measures according to the invention ensure that the sliding bushes can be made from a material that has high abrasion resistance on the one hand and good sliding properties compared to metal on the other. The fact that the sliding bushes are arranged at a distance from one another ensures good tilt-free guidance of the gas spring or of the additional tube surrounding it. On the other hand, the carrying sleeve can only be designed with regard to its ability to be pressed into the guide tube, i.e. In the choice of materials, relatively inexpensive plastics can be used, since abrasion resistance and sliding properties are irrelevant. Characterized in that a metal support tube is arranged between the slide bushes on the one hand and the support sleeve on the other hand, deformations of the support sleeve when pressed into the guide tube do not affect the dimensions and shape of the guide surfaces of the slide bushings.

Die Unteransprüche geben zahlreiche vorteilhafte Aus­gestaltungen der Führungsbüchse wieder.The sub-claims reflect numerous advantageous configurations of the guide bush.

Weitere Vorteile, Merkmale und Einzelheiten der Erfin­dung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels anhand der Zeichnung. Es zeigt

  • Fig. 1 eine Hubvorrichtung im Längsschnitt,
  • Fig. 2 eine Führungsbüchse nach der Erfindung im Längsschnitt,
  • Fig. 3 eine Gleitbuchse im Längsschnitt,
  • Fig. 4 eine Halbbüchse der Führungsbüchse in einer Längsansicht und
  • Fig. 5 einen Querschnitt durch die Halbbüchse gemäß der Schnittlinie V-V in Fig. 4.
Further advantages, features and details of the invention result from the following description of an exemplary embodiment with reference to the drawing. It shows
  • 1 is a lifting device in longitudinal section,
  • 2 is a guide sleeve according to the invention in longitudinal section,
  • 3 is a slide bush in longitudinal section,
  • Fig. 4 is a semi-sleeve of the guide sleeve in a longitudinal view and
  • 5 shows a cross section through the half-sleeve according to section line VV in FIG. 4.

Die in der Zeichnung dargestellte blockierbare Hub­vorrichtung zum stufenlosen Verstellen von Sitzen oder Tischplatten weist ein unteres Führungsrohr 1 auf, das im wesentlichen zylindrisch ausgebildet ist, in seinem unteren Bereich aber einen sich nach unten konisch verjüngenden Abschnitt 2 aufweist, der zur Aufnahme in einer entsprechenden Nabe 3 eines Fußgestells 4 dient. Das Führungsrohr 1 ist in der Nähe seines unteren En­des mit einer Bodenplatte 5 versehen, die eine zur Mittel-Längsachse 6 der gesamten Hubvorrichtung und damit auch des Führungsrohres 1 konzentrische Öffnung 7 aufweist. Ebenfalls achsparallel mit der Längsachse 6 ist eine längenverstellbare, hydraulisch oder pneu­matisch blockierbare Gasfeder B vorgesehen, deren zy­ lindrisches Gehäuse 9 sich im oberen Bereich des Füh­rungsrohres 1 und aus diesem nach oben hinausragend befindet, während ihre Kolbenstange 10 nach unten aus dem Gehäuse 9 herausragt und mit der Bodenplatte 5 lösbar verbunden ist. Hierzu ist das freie Ende der Kolbenstange 10 mit einem im Durchmesser reduzierten Zapfen 11 ausgebildet, auf dem ein Axial-Kugel-Lager 12 angeordnet ist, dessen oberer Laufring 13 sich gegen den am Übergang zwischen Zapfen 11 und Kolben­stange 10 ausgebildeten Ringbund 14 abstützt, während der untere Laufring 15 sich gegen die Bodenplatte 5 abstützt. Außerdem ist auf dem Zapfen ein Sicherungs­ring 16 angebracht, der das Axial-Kugel-Lager 12 in der dargestellten Stellung hält, auch wenn der untere Laufring 15 sich nicht gegen die Bodenplatte 5 ab­stützt.The blockable lifting device shown in the drawing for the stepless adjustment of seats or table tops has a lower guide tube 1, which is essentially cylindrical, but in its lower region has a downwardly conically tapering section 2, which is received in a corresponding hub 3 of a base frame 4 is used. The guide tube 1 is provided in the vicinity of its lower end with a base plate 5 which has an opening 7 which is concentric with the central longitudinal axis 6 of the entire lifting device and thus also with the guide tube 1. Also axially parallel to the longitudinal axis 6 is a length-adjustable, hydraulically or pneumatically lockable gas spring B, the zy The cylindrical housing 9 is located in the upper region of the guide tube 1 and protrudes upwards from it, while its piston rod 10 projects downwards from the housing 9 and is detachably connected to the base plate 5. For this purpose, the free end of the piston rod 10 is formed with a reduced-diameter pin 11, on which an axial ball bearing 12 is arranged, the upper race 13 of which is supported against the collar 14 formed at the transition between the pin 11 and the piston rod 10, while the lower race 15 is supported against the base plate 5. In addition, a locking ring 16 is attached to the pin, which holds the thrust ball bearing 12 in the position shown, even if the lower race 15 is not supported against the base plate 5.

Der Zapfen 11 durchsetzt die Öffnung 7 mit einem aus­reichenden radialen Spiel von einigen Zehntel Milli­metern bis zu einem Millimeter, so daß die Kolbenstan­ge 10 gegenüber dem Führungsrohr 1 nicht radial ver­spannt wird. Von außen, also unten, ist auf den Zapfen 11 eine Beilagscheibe 17 aufgeschoben, deren Durch­messer größer ist als der Durchmesser der Öffnung 7. Hiergegen ist wiederum ein Sicherungselement 18 ein­geschoben, so daß die Kolbenstange 10 der Gasfeder 8 axial fest aber lösbar mit dem Führungsrohr 1 verbun­den ist. Auf der Kolbenstange 10 befindet sich ein etwa ringzylindrischer Endlagen- oder Anschlag-Dämpfer 19 aus Gummi, der mit seiner Unterseite gegen den oberen Laufring 13 des Axial-Kugel-Lagers 12 anliegt.The pin 11 passes through the opening 7 with a sufficient radial play of a few tenths of a millimeter to one millimeter, so that the piston rod 10 is not radially clamped relative to the guide tube 1. From the outside, ie below, a washer 17 is pushed onto the pin 11, the diameter of which is larger than the diameter of the opening 7. Against this, a securing element 18 is inserted, so that the piston rod 10 of the gas spring 8 is axially fixed but releasable with the guide tube 1 is connected. On the piston rod 10 there is an approximately ring-cylindrical end position or stop damper 19 made of rubber, which rests with its underside against the upper race 13 of the axial ball bearing 12.

Das durchgehend kreiszylindrische Gehäuse 9 der Gas­feder 8 ist in einem über seine wesentliche Länge ebenfalls kreiszylindrischen Rohr 20 mit Schiebesitz angeordnet, d.h. das radiale Spiel zwischen dem Ge­häuse 9 und dem Rohr 20 beträgt einige Hundertstel Millimeter bis maximal 1 oder 2 Zehntel Millimeter. Das Spiel ist also gerade so, daß das Gehäuse 9 der Gasfeder 8 in das Rohr 20 eingeschoben bzw. aus diesem herausgezogen werden kann, wobei gleichzeitig aber das Gehäuse 9 in dem Rohr 20 radial geführt und gehalten ist. Dieses einen lösbaren Teil der Gasfeder 8 bilden­de Rohr 20 ist in seinem oberen, das Gehäuse 9 überra­genden Bereich mit einem sich konisch verjüngenden Be­festigungsabschnitt 21 versehen, der zur Herstellung einer festen einfach herzustellenden Steckverbindung mit einer entsprechend ausgebildeten Nabe 22 dient, die an der Unterseite eines Stuhles, Sessels, einer Tischplatte od.dgl. befestigt ist. Am Übergang zu dem Befestigungsabschnitt 21 ist im Rohr 20 eine entspre­chend der Verjüngung des Rohres 20 ausgebildete Hülse 23 angeordnet, die also in Richtung auf den Befesti­gungsabschnitt 21 axial festliegt. Gegen diese Hülse 23 stützt sich das Gehäuse 9 der Gasfeder 8 axial fest ab.The continuous circular cylindrical housing 9 of the gas spring 8 is arranged in a tube 20 with a sliding fit, which is also circular cylindrical over its essential length, i.e. the radial play between the housing 9 and the tube 20 is a few hundredths of a millimeter to a maximum of 1 or 2 tenths of a millimeter. The game is just such that the housing 9 of the gas spring 8 can be inserted into or pulled out of the tube 20, but at the same time the housing 9 is guided and held radially in the tube 20. This tube 20, which forms a detachable part of the gas spring 8, is provided in its upper region, which projects beyond the housing 9, with a conically tapering fastening section 21, which is used to produce a fixed, easy-to-produce plug connection with a suitably designed hub 22, which is on the underside of a Chairs, armchairs, a table top or the like. is attached. At the transition to the fastening section 21, a sleeve 23, which is designed in accordance with the tapering of the pipe 20 and is thus axially fixed in the direction of the fastening section 21, is arranged in the pipe 20. The housing 9 of the gas spring 8 is supported axially firmly against this sleeve 23.

Von der anderen Seite her, also vom unteren freien Ende des Rohres 20 her, ist das Gehäuse 9 in dem Rohr 20 axial mittels eines lösbaren Befestigungselementes 24 festgehalten. Hierbei kann es sich um eine soge­nannte Kralle handeln, also einen mit federnden Vor­sprüngen versehenen Ring, der sich in einer Richtung, also bis zur Anlage gegen das Gehäuse 9 relativ leicht in das Rohr 20 einschieben läßt, sich aber einer ent­gegengesetzten Bewegung dadurch widersetzt, daß er sich widerhakenartig in dem Rohr verklammert. Mit einem ausreichenden Kraftaufwand, beispielsweise mit­tels eines Schraubendrehers, ist er aber ohne weiteres nach unten herausnehmbar, wodurch in einfacher Weise die Verbindung zwischen dem Gehäuse 9 und dem Rohr 20 aufgehoben wird. Naturgemäß kommen auch viele andere Arten von Befestigungselementen einschließlich Schraubverbindungen in Betracht.From the other side, that is, from the lower free end of the tube 20, the housing 9 is held axially in the tube 20 by means of a releasable fastening element 24. This can be a so-called claw, that is to say a ring provided with resilient projections, which is relatively easy in one direction, that is to say, until it rests against the housing 9 can be inserted into the tube 20, but opposes an opposite movement in that it clings to the tube like barbs. With a sufficient effort, for example by means of a screwdriver, it can be easily removed downwards, whereby the connection between the housing 9 and the tube 20 is broken in a simple manner. Naturally, many other types of fasteners, including screw connections, are also contemplated.

Dieses einen lösbaren Teil der Gasfeder 8 bildende Rohr ist in üblicher Weise axial verschiebbar in dem Führungsrohr 1 gelagert, wozu dieses in seinem oberen Bereich mit einer Führungsbüchse 25 versehen ist, die weiter unten noch genau beschrieben wird. Das Füh­rungsrohr 1 und das Rohr 20 bestehen aus Stahl. Glei­ches gilt für das Gehäuse 9 der Gasfeder 8, wogegen die Hülse 23 aus einem weicheren Material, beispiels­weise Zinkdruckguß, besteht.This tube, which forms a detachable part of the gas spring 8, is mounted in the usual manner axially displaceably in the guide tube 1, for which purpose this is provided in its upper region with a guide bush 25, which will be described in more detail below. The guide tube 1 and the tube 20 are made of steel. The same applies to the housing 9 of the gas spring 8, whereas the sleeve 23 consists of a softer material, for example die-cast zinc.

Längenverstellungen der Gasfeder 8 und damit Höhenver­stellungen der gesamten Hubvorrichtung erfolgen durch Betätigung eines aus dem oberen, der Kolbenstange 10 abgewandten Ende herausragenden Betätigungsstößels 26 der Gasfeder 8, der zur Ermöglichung der entsprechen­den Längenverstellungen in das Gehäuse 9 hineinge­drückt wird. Hierzu ist in dem sich konisch nach oben verjüngenden Befestigungsabschnitt 21 ein nach oben aus letzterem herausragender Schiebekörper 27 ange­ordnet, der mit einer Anlagefläche 28 gegen den Betä­tigungsstößel 26 anliegt. Dieser Schiebekörper 27 ist weiterhin mit Haltefingern 29 versehen, die federnd hinter einen entsprechenden Ring 30 an der Hülse 23 greifen, wodurch der Schiebekörper 27 gegen ein unbe­absichtigtes Herausfallen oder Herausziehen aus dem Befestigungsabschnitt 21 unter gleichzeitiger weit­gehend spielfreier Anlage der Anlagefläche 28 gegen den Betätigungsstößel 26 gesichert ist. Die Betätigung erfolgt mittels eines nicht dargestellten, in der Nabe 22 in üblicher Weise gelagerten schwenkbaren Betäti­gungshebels, der gegen die Außenfläche des Schiebe­körpers 27 zur Anlage kommt, wie es beispielsweise aus dem DE-GM 70 19 918 (entsprechend US-PS 3 790 119) bekannt ist.Length adjustments of the gas spring 8 and thus height adjustments of the entire lifting device are carried out by actuating an actuating plunger 26 of the gas spring 8 which protrudes from the upper end facing away from the piston rod 10 and which is pressed into the housing 9 to enable the corresponding length adjustments. For this purpose, an upwardly protruding sliding body 27 is arranged in the fastening section 21, which tapers conically upwards and bears with a contact surface 28 against the actuating plunger 26. This sliding body 27 is further provided with retaining fingers 29, which engage resiliently behind a corresponding ring 30 on the sleeve 23, as a result of which the sliding body 27 is secured against the actuating plunger 26 against inadvertent falling out or being pulled out of the fastening section 21 while at the same time largely free of play against the contact surface 28. The actuation is carried out by means of a pivotable actuating lever, not shown, which is mounted in the hub 22 in the usual way and which comes into contact with the outer surface of the sliding body 27, as is known, for example, from DE-GM 70 19 918 (corresponding to US Pat. No. 3,790,119). is known.

Die Gasfeder 8 muß nicht zwingend in einem zusätzli­chen zylindrischen Rohr 20 angeordnet sein; sie kann auch unmittelbar mit ihrem Gehäuse in der Führungs­büchse 25 geführt sein und an der Unterseite eines Stuhlsitzes, einer Tischplatte od.dgl. befestigt sein. Dies ist beispielsweise aus der DE-PS 19 37 012 be­kannt, die der US-PS 3 711 054 bzw. der JP-PS 892 209 entspricht, worauf verwiesen wird.The gas spring 8 does not necessarily have to be arranged in an additional cylindrical tube 20; it can also be guided directly with its housing in the guide bush 25 and the like on the underside of a chair seat, a table top. be attached. This is known, for example, from DE-PS 19 37 012, which corresponds to US Pat. No. 3,711,054 or JP-PS 892 209, to which reference is made.

Die Führungsbüchse 25 ist mehrteilig aufgebaut. Sie besteht aus einem Tragrohr 31, in dieses eingesetzten Gleitbuchsen 32,33 und einer äußeren zweiteiligen Tragbüchse 34. Das Tragrohr 31 ist kreisringzylin­drisch ausgebildet und weist insbesondere innen einen verhältnismäßig genauen, also nur mit geringen Tole­ranzen behafteten Innendurchmesser Di auf. Die beiden Gleitbuchsen 32,33 sind identisch ausgebildet. Sie weisen - vor dem Einsetzen in das Tragrohr 31 - einen Außendurchmesser da auf, der um einige wenige Hundert­stel Millimeter, beispielsweise 0,02 bis 0,09 mm größer ist als der Innendurchmesser Di des Tragrohres 31. An einem Ende sind die kreisringzylinderförmigen Gleitbuchsen 32,33 mit einem nach außen vorragenden Ringbund 35 versehen. Die Gleitbuchsen 32,33 werden in der Weise in das Tragrohr 31 eingesetzt, daß von des­sen beiden Enden jeweils eine Gleitbuchse 32 bzw. 33 eingepreßt wird, bis ihr Ringbund 35 gegen die ent­sprechende Stirnseite 36 des Tragrohres anliegt. Wie Fig. 2 erkennen läßt, erstrecken sich die beiden Gleitbuchsen 32,33 über ein Viertel bis ein Drittel der Länge des Tragrohres 31, so daß zwischen den bei­den Gleitbuchsen 32,33 ein sich etwa über ein Drittel bis zwei Viertel der Länge des Tragrohres 31 er­streckender Freiraum 37 gebildet ist. Die als Füh­rungsflächen 38 für das Gehäuse einer Gasfeder bzw. das Rohr 20 dienenden Innenflächen der Gleitbuchsen 32,33 haben also den geschilderten Abstand voneinan­der, so daß das Rohr 20 bzw. ein Gehäuse der Gasfeder nur durch diese voneinander distanzierten Führungs­flächen 38 geführt wird. Der Innendurchmesser di der Gleitbuchsen 32,33 entspricht also mit dem üblichen Führungsspiel dem Außendurchmesser des Gehäuses einer Gasfeder bzw. dem Außendurchmesser des Rohres 20.The guide bush 25 is constructed in several parts. It consists of a support tube 31, slide bushings 32, 33 inserted into this and an outer two-part support sleeve 34. The support tube 31 is designed as an annular cylinder and, in particular, has a relatively precise inside diameter Di, that is to say with only small tolerances. The two sliding bushes 32, 33 are of identical design. They have one before being inserted into the support tube 31 Outer diameter there, which is a few hundredths of a millimeter, for example 0.02 to 0.09 mm, larger than the inner diameter Di of the support tube 31. The sliding bushes 32, 33 are inserted into the supporting tube 31 in such a way that a sliding bush 32 or 33 is pressed in from each of their two ends until their collar 35 rests against the corresponding end face 36 of the supporting tube. As can be seen in FIG. 2, the two sliding bushings 32, 33 extend over a quarter to one third of the length of the support tube 31, so that between the two sliding bushings 32, 33 there is approximately a third to two quarters of the length of the support tube 31 extending free space 37 is formed. The inner surfaces of the sliding bushes 32, 33, which serve as guide surfaces 38 for the housing of a gas spring or the tube 20, therefore have the distance described, so that the tube 20 or a housing of the gas spring is only guided through these guide surfaces 38, which are spaced apart from one another. The inside diameter di of the sliding bushes 32, 33 thus corresponds to the outside diameter of the housing of a gas spring or the outside diameter of the tube 20 with the usual guide play.

Die zweiteilig ausgebildete Tragbüchse 34 besteht aus zwei gleichartig ausgebildeten Halbbüchsen 39,40, die in ihrer Grundform jeweils aus einem Halbkreisringzy­linderabschnitt 41 bestehen, von dem nach außen paral­lel zur Achse 6 verlaufende Rippen 42 abstehen. Die Halbbüchsen 39,40 weisen Längsflansche 43,44 auf, die beim Zusammenfügen der beiden Halbbüchsen 39,40 gegen­einanderliegen. Sie liegen dann in einer Ebene gegen­einander, die durch die Mittel-Längs-Achse 6 geführt ist. An diesen Längsflanschen 43,44 sind Zapfen 45 und zugeordnete Öffnungen 46 ausgebildet, so daß beim Zu­sammenfügen der beiden Halbbüchsen 39,40 die Zapfen 45 der einen Halbbüchse 39,40 in die Öffnung 46 der ande­ren Halbbüchse 40 bzw. 39 eingreifen.The two-part bushing 34 consists of two half bushes 39, 40 of identical design, each of which has a semicircular cylinder section 41 in its basic form, from which ribs 42 extending outwards parallel to the axis 6 project. The half-sleeves 39.40 have longitudinal flanges 43.44 which lie against each other when joining the two half-sleeves 39.40. They then lie against each other in a plane which is guided through the central longitudinal axis 6. Pins 45 and associated openings 46 are formed on these longitudinal flanges 43, 44, so that when the two half-sleeves 39, 40 are joined together, the pins 45 of one half-sleeve 39, 40 engage in the opening 46 of the other half-sleeve 40 and 39, respectively.

An einem, dem unteren, Ende der Halbbüchsen 39,40 ist ein jeweils halbringförmiger, radial nach innen vor­springender Anschlag 47 ausgebildet, gegen den - wie aus Fig. 2 ersichtlich ist - in montiertem Zustand der Führungsbüchse 25 der Ringbund 35 der zugehörigen Gleitbuchse 32 anliegt, so daß das Tragrohr 31 mit den beiden Gleitbuchsen 32,33 axial in einer Richtung festgelegt ist. In der anderen Richtung ist das Trag­rohr 31 mit den beiden Gleitbuchsen 32,33 in der Weise festgelegt, daß ein oberer jeweils halbringförmiger Anschlag 48 an den beiden Halbbüchsen 39,40 ausgebil­det ist, der ebenfalls radial nach innen über den Halbkreisringzylinderabschnitt vorragt. Hiergegen liegt der Ringbund 35 der benachbarten Gleitbuchse 33 axial an. Wie aus Fig. 2 hervorgeht, ist dieser obere Anschlag 48 in axialer Richtung leicht federnd ausge­bildet, so daß er einerseits Längentoleranzen des Tragrohrs 31 mit den beiden Gleitbuchsen 32,33 aus­gleichen kann und andererseits doch das Tragrohr 31 mit den beiden Gleitbuchsen 32,33 axial spielfrei und damit auch wackelfrei hält. Hierzu ist dieser Anschlag 48 jeweils in Form einer Halbringscheibe bis in den radialen Außenbereich der Rippen 42 geführt und dort an einem Halb-Ringsteg 49 angebracht, der radial nach außen vorspringt und einen Außendurchmesser hat, der dem Innendurchmesser des Führungsrohres 1 entspricht. An der Verbindungsstelle zwischen diesem Halb-Ringsteg 49 und dem Anschlag 48 ist auch noch ein Ringbund 50 ausgebildet, der beim Einschieben der fertigmontierten Führungsbüchse 25 gegen die entsprechende Stirnseite 51 des Führungsrohres 1 zur Anlage kommt.On one, the lower, end of the half-sleeves 39, 40 a semi-ring-shaped, radially inwardly projecting stop 47 is formed, against which — as can be seen from FIG. 2 — the ring collar 35 of the associated slide bush 32 abuts in the assembled state of the guide bush 25 , so that the support tube 31 with the two sliding bushes 32, 33 is fixed axially in one direction. In the other direction, the support tube 31 is fixed with the two sliding bushes 32, 33 in such a way that an upper, half-ring-shaped stop 48 is formed on the two half-sleeves 39, 40, which also projects radially inward beyond the semicircular cylinder section. Against this, the collar 35 of the adjacent sliding bush 33 lies axially. As is apparent from Fig. 2, this upper stop 48 is designed to be slightly resilient in the axial direction, so that it can compensate for length tolerances of the support tube 31 with the two sliding bushings 32, 33 on the one hand, and the supporting tube 31 with the two sliding bushings 32, 33, on the other hand, can be adjusted axially free of play and thus also wobble-free. For this purpose, this stop 48 is in each case in the form of a half-ring disk and is guided into the radial outer region of the ribs 42 attached to a half-ring web 49 which projects radially outwards and has an outer diameter which corresponds to the inner diameter of the guide tube 1. At the connection point between this half-ring web 49 and the stop 48 there is also an annular collar 50 which comes into contact with the corresponding end face 51 of the guide tube 1 when the fully assembled guide bush 25 is inserted.

Das bereits mit den Gleitbuchsen 32,33 versehene Trag­rohr 31 wird in eine der Halbbüchsen 39 bzw. 40 einge­legt. Anschließend wird die andere Halbbüchse 40 bzw. 39 dagegengesetzt, wobei die Zapfen 45 in die entspre­chenden Öffnungen 46 eingreifen. Diese fertigmontierte Führungsbüchse 25 wird dann in das Führungsrohr 1 ein­geschoben, bis der Ringbund 50 gegen die Stirnseite 51 anliegt. Die Rippen 42 werden hierbei elastisch ge­ringfügig verformt, so daß die gesamte Führungsbüchse 25 fest im Führungsrohr 1 sitzt. Da das Tragrohr 31 praktisch unverformbar ist, da es aus Stahl oder Alu­minium oder einem vergleichbaren Metall besteht, wir­ken sich die toleranzbedingten Verformungen der Trag­büchse 34 nicht auf den Innendurchmesser di der Gleit­buchsen 32,33 und damit nicht auf die genauen Maße der Führungsflächen 38 aus.The support tube 31 already provided with the sliding bushes 32, 33 is inserted into one of the half bushes 39 and 40, respectively. The other half-sleeve 40 or 39 is then placed against it, the pins 45 engaging in the corresponding openings 46. This fully assembled guide bush 25 is then inserted into the guide tube 1 until the collar 50 rests against the end face 51. The ribs 42 are elastically slightly deformed so that the entire guide bush 25 is seated firmly in the guide tube 1. Since the support tube 31 is practically non-deformable, since it consists of steel or aluminum or a comparable metal, the tolerance-related deformations of the support sleeve 34 do not affect the inner diameter di of the slide bushes 32, 33 and thus not the exact dimensions of the guide surfaces 38.

Darüber hinaus können die relativ werkstoffaufwendigen Halbbüchsen 39,40, die jeweils einstückig sind, aus einem preiswerten Kunststoff, beispielsweise PPN (Polypropylen) hergestellt werden, während die Gleit­buchsen 32,33 aus einem Kunststoff mit besonders guten Gleiteigenschaften gegenüber Metall, insbesondere Stahl, hergestellt werden. Aus Metall, und zwar insbe­sondere Stahl, besteht das Rohr 20 bzw. das Gehäuse einer unmittelbar geführten Gasfeder. Als solcher Kunststoff mit besonders guten Gleiteigenschaften gilt Polyacetal.In addition, the relatively material-consuming half-sleeves 39, 40, which are each in one piece, can be produced from an inexpensive plastic, for example PPN (polypropylene), while the sliding sleeves 32, 33 from a plastic with particularly good sliding properties compared to metal, in particular Steel. The tube 20 or the housing of a directly guided gas spring consists of metal, in particular steel. Polyacetal is considered to be such a plastic with particularly good sliding properties.

Der Außendurchmesser Da des Tragrohrs 31 ist so gewählt, daß es spielfrei in der Tragbüchse 34 gehalten ist.The outer diameter Da of the support tube 31 is selected so that it is held in the support sleeve 34 without play.

Claims (16)

1. Blockierbare Hubvorrichtung zum stufenlosen Ver­stellen von Stuhlsitzen, Tischplatten oder ähnlichen Möbelteilen, mit einem mit einem Fußgestell (4) ver­bindbaren Führungsrohr (1) und mit einer längenver­stellbaren, blockierbaren Gasfeder (8), deren Kolben­stange (10) mit einer Bodenplatte (5) des Führungs­rohres (1) axial fest aber lösbar verbunden ist, deren Gehäuse (9) in dem der Kolbenstange (10) entgegenge­setzten Bereich mit dem Stuhlsitz oder der Tischplatte axial fest, wenn auch grundsätzlich lösbar verbindbar ist, deren gegebenenfalls von einem zusätzlichen Rohr (20) umgebenes Gehäuse (9) im Führungsrohr (1) mittels einer in letzterem gehaltenen Führungsbüchse (25) seitlich fest und axial verschiebbar geführt ist, und die einen Betätigungsstößel (26) zum Längenverstellen der Gasfeder (8) aufweist, dadurch gekennzeichnet, daß die Führungsbüchse (25) ein zentrales Tragrohr (31) aufweist, in dem im Abstand voneinander Gleitbuchsen (32,33) angeordnet sind, und das von einer Tragbüchse (34) umgeben ist, die im Führungsrohr (1) gehalten ist.1. Blockable lifting device for the continuous adjustment of chair seats, table tops or similar furniture parts, with a guide tube (1) which can be connected to a base frame (4) and with a length-adjustable, lockable gas spring (8), the piston rod (10) of which has a base plate (5) of the guide tube (1) is axially fixed but releasably connected, the housing (9) of which, in the area opposite the piston rod (10), can be axially fixed, if in principle releasably, connected to the chair seat or the table top, the latter of which may be connected by an additional tube (20 ) Surrounded housing (9) in the guide tube (1) by means of a guide bush (25) held in the latter is guided laterally fixed and axially displaceable, and which has an actuating plunger (26) for adjusting the length of the gas spring (8), characterized in that the guide bush (25) has a central supporting tube (31), in which sliding bushes (32, 33) are arranged at a distance from one another, and that of a supporting bush e (34) is surrounded, which is held in the guide tube (1). 2. Hubvorrichtung nach Anspruch 1, dadurch gekenn­zeichnet, daß die Tragbüchse (34) aus zwei identi­schen, jeweils einstückigen Halbbüchsen (39,40) be­steht.2. Lifting device according to claim 1, characterized in that the carrying sleeve (34) consists of two identical, each one-piece half-sleeves (39, 40). 3. Hubvorrichtung nach Anspruch 2, dadurch gekenn­zeichnet, daß die Halbbüchsen (39,40) im Bereich ihrer axialen Enden radial nach innen vorspringende An­schläge (47,48) aufweisen, gegen die das Tragrohr (31) mit den Gleitbuchsen (32,33) axial spielfrei anliegt.3. Lifting device according to claim 2, characterized in that the half-sleeves (39, 40) have radially inwardly projecting stops (47, 48) in the region of their axial ends, against which the support tube (31) with the sliding bushes (32, 33) axially free of play. 4. Hubvorrichtung nach Anspruch 3, dadurch gekenn­zeichnet, daß mindestens ein Anschlag (48) axial elastisch nachgiebig ausgebildet ist.4. Lifting device according to claim 3, characterized in that at least one stop (48) is axially resilient. 5. Hubvorrichtung nach Anspruch 2, dadurch gekenn­zeichnet, daß die Halbbüchsen (39,40) mit Längsflan­schen (43,44) versehen sind, an denen Zapfen (45) und zugeordnete Öffnungen (46) ausgebildet sind.5. Lifting device according to claim 2, characterized in that the half-sleeves (39, 40) are provided with longitudinal flanges (43, 44), on which pins (45) and associated openings (46) are formed. 6. Hubvorrichtung nach Anspruch 3, dadurch gekenn­zeichnet, daß die Gleitbuchsen (32,33) mittels jeweils eines Ringbundes (50) zwischen der benachbarten Stirn­seite (36) des Tragrohres (31) und dem benachbarten Anschlag (47,48) der Tragbüchse (34) axial gehalten sind.6. Lifting device according to claim 3, characterized in that the sliding bushes (32, 33) by means of an annular collar (50) between the adjacent end face (36) of the support tube (31) and the adjacent stop (47, 48) of the support sleeve (34 ) are held axially. 7. Hubvorrichtung nach Anspruch 1, dadurch gekenn­zeichnet, daß die Gleitbuchsen (32,33) mit Preßsitz oder Haftsitz in dem Tragrohr (31) gehalten sind.7. Lifting device according to claim 1, characterized in that the sliding bushes (32,33) are held in the support tube (31) with a press fit or adhesive fit. 8. Hubvorrichtung nach Anspruch 1, dadurch gekenn­zeichnet, daß das Tragrohr (31) aus Metall besteht.8. Lifting device according to claim 1, characterized in that the support tube (31) consists of metal. 9. Führungsbüchse für eine Hubvorrichtung nach dem Oberbegriff des Anspruches 1, dadurch gekennzeichnet, daß die Führungsbüchse (25) ein zentrales Tragrohr (31) aufweist, in dem im Abstand voneinander Gleit­buchsen (32,33) angeordnet sind, und das von einer Tragbüchse (34) umgeben ist, die im Führungsrohr (1) gehalten ist.9. guide sleeve for a lifting device according to the preamble of claim 1, characterized in that the guide sleeve (25) has a central support tube (31) in which spaced sliding bushes (32,33) are arranged, and that of a support sleeve ( 34) is surrounded, which is held in the guide tube (1). 10. Führungsbüchse nach Anspruch 9, dadurch gekenn­zeichnet, daß die Tragbüchse (34) aus zwei identi­schen, jeweils einstückigen Halbbüchsen (39,40) besteht.10. Guide sleeve according to claim 9, characterized in that the carrying sleeve (34) consists of two identical, each one-piece half-sleeves (39, 40). 11. Führungsbüchse nach Anspruch 10, dadurch gekenn­zeichnet, daß die Halbbüchsen (39,40) im Bereich ihrer axialen Enden radial nach innen vorspringende An­schläge (47,48) aufweisen, gegen die das Tragrohr (31) mit den Gleitbuchsen (32,33) axial spielfrei anliegt.11. Guide sleeve according to claim 10, characterized in that the half-sleeves (39, 40) have radially inwardly projecting stops (47, 48) in the region of their axial ends, against which the support tube (31) with the sliding bushes (32, 33) axially free of play. 12. Führungsbüchse nach Anspruch 11, dadurch gekenn­zeichnet, daß mindestens ein Anschlag (48) axial elastisch nachgiebig ausgebildet ist.12. Guide bushing according to claim 11, characterized in that at least one stop (48) is axially resilient. 13. Führungsbüchse nach Anspruch 10, dadurch gekenn­zeichnet, daß die Halbbüchsen (39,40) mit Längsflan­schen (43,44) versehen sind, an denen Zapfen (45) und zugeordnete Öffnungen (46) ausgebildet sind.13. Guide sleeve according to claim 10, characterized in that the half-sleeves (39, 40) are provided with longitudinal flanges (43, 44), on which pins (45) and associated openings (46) are formed. 14. Führungsbüchse nach Anspruch 11, dadurch gekenn­zeichnet, daß die Gleitbuchsen (32,33) mittels jeweils eines Ringbundes (50) zwischen der benachbarten Stirn­seite (36) des Tragrohres (31) und dem benachbarten Anschlag (47,48) der Tragbüchse (34) axial gehalten sind.14. Guide sleeve according to claim 11, characterized in that the sliding bushes (32, 33) by means of an annular collar (50) between the adjacent end face (36) of the support tube (31) and the adjacent stop (47, 48) of the support sleeve (34 ) are held axially. 15. Führungsbüchse nach Anspruch 9, dadurch gekenn­zeichnet, daß die Gleitbuchsen (32,33) mit Preßsitz oder Haftsitz in dem Tragrohr (31) gehalten sind.15. Guide bushing according to claim 9, characterized in that the sliding bushes (32,33) are held with a press fit or adhesive fit in the support tube (31). 16. Führungsbüchse nach Anspruch 9, dadurch gekenn­zeichnet, daß das Tragrohr (31) aus Metall besteht.16. Guide bushing according to claim 9, characterized in that the support tube (31) consists of metal.
EP88119734A 1988-01-28 1988-11-26 Blockable lifting device for the stepless adjustment of furniture parts, and guiding bush for such a lifting device Expired - Lifetime EP0325726B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88119734T ATE74725T1 (en) 1988-01-28 1988-11-26 LOCKABLE LIFTING DEVICE FOR CONTINUOUS ADJUSTMENT OF FURNITURE PARTS AND GUIDE BUSHING FOR SUCH LIFTING DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8800976U DE8800976U1 (en) 1988-01-28 1988-01-28
DE8800976U 1988-01-28

Publications (2)

Publication Number Publication Date
EP0325726A1 true EP0325726A1 (en) 1989-08-02
EP0325726B1 EP0325726B1 (en) 1992-04-15

Family

ID=6820020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88119734A Expired - Lifetime EP0325726B1 (en) 1988-01-28 1988-11-26 Blockable lifting device for the stepless adjustment of furniture parts, and guiding bush for such a lifting device

Country Status (9)

Country Link
US (1) US4899969A (en)
EP (1) EP0325726B1 (en)
JP (1) JPH0531968Y2 (en)
KR (1) KR940007032Y1 (en)
AT (1) ATE74725T1 (en)
DE (2) DE8800976U1 (en)
ES (1) ES2031985T3 (en)
GR (1) GR3004573T3 (en)
TR (1) TR24248A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0441267A1 (en) * 1990-02-03 1991-08-14 Stabilus GmbH A support column
EP0511500A1 (en) * 1991-05-01 1992-11-04 SUSPA COMPART Aktiengesellschaft Blockable lifting device for continuously adjusting a seat
DE4200786A1 (en) * 1992-01-14 1993-07-15 Suspa Compart Ag LENGTH ADJUSTABLE COLUMN FOR TABLES, CHAIRS OR THE LIKE
EP0553440A1 (en) * 1992-01-25 1993-08-04 SUSPA COMPART Aktiengesellschaft Guiding bush for a length adjustable column for chairs, tables or the like
DE9212735U1 (en) * 1992-09-22 1994-02-03 Schneider W Dictator Tech Lockable gas spring
EP0602406A2 (en) * 1992-12-16 1994-06-22 SUSPA COMPART Aktiengesellschaft Guide bush particularly for an adjustable chair column and chair column equipped with such a guide bush
EP0668037A1 (en) * 1994-02-18 1995-08-23 SUSPA COMPART Aktiengesellschaft Guiding sleeve and telescopic column with guiding sleeve
EP0802346A2 (en) * 1996-04-11 1997-10-22 Gain Gas Technique, S.L. Gas cylinder
EP0910973A2 (en) 1997-10-16 1999-04-28 SUSPA COMPART Aktiengesellschaft Guide bush and length adjustable column with a guide bush
DE19713035C2 (en) * 1997-03-27 2000-09-07 T R Plast & Co Kunststoff Vera Guide bushing for a spring tube that can be inserted in a standpipe of office chairs

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5020752A (en) * 1990-06-12 1991-06-04 Westinghouse Electric Corporation Adjustable pedestal for tables and the like
DE4024392A1 (en) * 1990-08-01 1992-02-06 Suspa Compart Ag METHOD FOR PRODUCING A SLIDING SURFACE ON A PLASTIC GUIDE BUSH FOR A HEIGHT-ADJUSTABLE CHAIR COLUMN
DE9013467U1 (en) * 1990-09-25 1990-11-22 Suspa Compart Ag, 8503 Altdorf, De
IL98036A0 (en) * 1991-05-02 1992-06-21 Yoav Cohen Plastic stand pipe support for load-bearing adjustable piston
FR2678495B1 (en) * 1991-07-01 1993-09-24 Airax Sa COLUMN INTENDED TO BE PART OF A FURNITURE SUPPORT EQUIPPED WITH A GAS SPRING.
US5234187A (en) * 1992-06-02 1993-08-10 Steelcase Inc. Chair height adjustment mechanism
CA2319865C (en) * 1992-06-15 2001-12-11 Herman Miller, Inc. Tilt control mechanism for a chair
DE4227553A1 (en) * 1992-08-20 1994-02-24 Stabilus Gmbh Height adjustable support esp. for chair seat - has foot, upright, guide surface, support in bottom of upright.
DE4233407A1 (en) * 1992-10-05 1994-04-07 Stabilus Gmbh Guide for telescopic cylindrical parts
US5511759A (en) * 1994-05-26 1996-04-30 Steelcase, Inc. Hydraulic chair height adjustment mechanism
EP0707160B1 (en) * 1994-07-28 1998-12-02 SUSPA COMPART Aktiengesellschaft Adjustable-length gas spring for chairs, tables etc.
US5586830A (en) * 1994-12-05 1996-12-24 Ashley Furniture, Industries, Inc. Pivoting and variable height table
US5608960A (en) * 1995-06-07 1997-03-11 Herman Miller, Inc. Apparatus and method for mounting a support column to a chair base and tilt control housing
US5740997A (en) * 1995-06-07 1998-04-21 Herman Miller, Inc. Pneumatic height adjustment column for a chair
US5556170A (en) * 1995-08-22 1996-09-17 Lai; Yu-Shan Sleeve structure of an office chair
US5756569A (en) * 1996-12-19 1998-05-26 Carver; Bobby Carroll Use of alkyl 3-alkoxypropionates as coalescing agents in aqueous coating compositions
WO1998003360A1 (en) * 1996-07-24 1998-01-29 Pilot Precision Dampers Limited Extended travel damper
US5979845A (en) * 1997-05-16 1999-11-09 Steelcase Inc. Hub tube/washer assembly
CN1106512C (en) * 1997-06-04 2003-04-23 燃气技术开发公司 Gas cylinder
US6371421B1 (en) * 1997-08-23 2002-04-16 Samhongsa Co., Ltd. Device for controlling the height of a swivel chair
US6116555A (en) * 1998-05-29 2000-09-12 Krueger International, Inc. Plastic chair base including hub with integral ring and oppositely-directed tapers
US5984567A (en) * 1998-07-09 1999-11-16 Gollin & Co., Inc. Molded split sleeve bushing for chair base
US6841021B1 (en) 2000-07-10 2005-01-11 General Electric Company Method of making a polyimide resin and carbon fiber molded tube clamp
DE10227201C1 (en) * 2002-06-18 2003-09-04 Stabilus Gmbh Furniture item support column has pressure equalisation openings for movement of carrier tube arranged to prevent collection of water in guide tube
TWM255364U (en) * 2004-04-12 2005-01-11 Chin-Chih Lin Cantilever arm structure
DE102007003321A1 (en) * 2007-01-17 2008-08-21 Mbb International Group Ag Closure device for a pressurized gas-filled pressure vessel of a cold gas generator
US20140145483A1 (en) * 2011-04-29 2014-05-29 Samhongsa Co., Ltd. Column unit for chair
US20130086835A1 (en) * 2011-10-10 2013-04-11 Steven W. Minneman Weapon rest
DE102014207191A1 (en) * 2013-11-05 2015-05-07 Sedus Stoll Ag Height adjustment device and chair with such a height adjustment device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7235759U (en) * 1973-02-01 Giroflex Entwicklungs Ag Gas mechanics especially for chairs
EP0258656A1 (en) * 1986-08-09 1988-03-09 Stabilus GmbH Telescopic device

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH514317A (en) * 1969-06-19 1971-10-31 Bauer Fritz Lifting device for stepless adjustment of a wing, in particular the seat of chairs or stools
US4323088A (en) * 1979-11-20 1982-04-06 Pipe Shields, Inc. Insulating pipe support
CA1154369A (en) * 1980-02-11 1983-09-27 Duane M. Beukema Height adjustor for furniture
US4493469A (en) * 1983-01-19 1985-01-15 Mohasco Corporation Height adjustment control arrangement
DE8321916U1 (en) * 1983-07-29 1983-11-17 Fritz Bauer + Söhne oHG, 8503 Altdorf LOCKABLE LIFTING DEVICE FOR CONTINUOUSLY ADJUSTING CHAIR SEATS, TABLETOP OR SIMILAR FURNITURE
GB8329695D0 (en) * 1983-11-07 1983-12-07 Von Dulong O Table/desk
JPS6091054U (en) * 1983-11-29 1985-06-21 ジロフレツクス　エントヴイツクルンクス　アクチエンゲゼルシヤフト chair legs
JPS60146448U (en) * 1984-03-09 1985-09-28 トキコ株式会社 Seat lifting device for chairs, etc.
DE3420528A1 (en) * 1984-06-01 1985-12-05 Stabilus Gmbh, 5400 Koblenz CONTINUOUSLY ADJUSTABLE LIFTING DEVICE
JPS6137321U (en) * 1984-08-09 1986-03-08 益太郎 中尾 plate-like body
US4592590A (en) * 1984-11-05 1986-06-03 Kimball International, Inc. Hydraulic lifting mechanism for a chair or the like using a two phase working fluid
US4613106A (en) * 1985-04-25 1986-09-23 Tornero Lino E Mechanical adjustable column
DE3517003A1 (en) * 1985-05-10 1986-11-13 Stabilus Gmbh, 5400 Koblenz CONE CONNECTION ON A HEIGHT-ADJUSTABLE CHAIR OR TABLE COLUMN
US4720068A (en) * 1986-08-29 1988-01-19 Tornero Lino E Seat support column

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7235759U (en) * 1973-02-01 Giroflex Entwicklungs Ag Gas mechanics especially for chairs
EP0258656A1 (en) * 1986-08-09 1988-03-09 Stabilus GmbH Telescopic device

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5131615A (en) * 1990-02-03 1992-07-21 Stabilus Gmbh Support column
EP0441267A1 (en) * 1990-02-03 1991-08-14 Stabilus GmbH A support column
EP0511500A1 (en) * 1991-05-01 1992-11-04 SUSPA COMPART Aktiengesellschaft Blockable lifting device for continuously adjusting a seat
DE4200786A1 (en) * 1992-01-14 1993-07-15 Suspa Compart Ag LENGTH ADJUSTABLE COLUMN FOR TABLES, CHAIRS OR THE LIKE
US5333968A (en) * 1992-01-14 1994-08-02 Suspa Compart Aktiengesellschaft Length-adjustable column for tables, chairs or the like
TR26401A (en) * 1992-01-25 1995-03-15 Suspa Compart Ag CHAIRS TABLE ETC.
EP0553440A1 (en) * 1992-01-25 1993-08-04 SUSPA COMPART Aktiengesellschaft Guiding bush for a length adjustable column for chairs, tables or the like
DE9212735U1 (en) * 1992-09-22 1994-02-03 Schneider W Dictator Tech Lockable gas spring
EP0602406A2 (en) * 1992-12-16 1994-06-22 SUSPA COMPART Aktiengesellschaft Guide bush particularly for an adjustable chair column and chair column equipped with such a guide bush
EP0602406A3 (en) * 1992-12-16 1995-05-17 Suspa Compart Ag Guide bush particularly for an adjustable chair column and chair column equipped with such a guide bush.
EP0668037A1 (en) * 1994-02-18 1995-08-23 SUSPA COMPART Aktiengesellschaft Guiding sleeve and telescopic column with guiding sleeve
EP0802346A2 (en) * 1996-04-11 1997-10-22 Gain Gas Technique, S.L. Gas cylinder
EP0802346A3 (en) * 1996-04-11 1998-12-23 Gain Gas Technique, S.L. Gas cylinder
DE19713035C2 (en) * 1997-03-27 2000-09-07 T R Plast & Co Kunststoff Vera Guide bushing for a spring tube that can be inserted in a standpipe of office chairs
EP0910973A2 (en) 1997-10-16 1999-04-28 SUSPA COMPART Aktiengesellschaft Guide bush and length adjustable column with a guide bush

Also Published As

Publication number Publication date
TR24248A (en) 1991-07-04
EP0325726B1 (en) 1992-04-15
ES2031985T3 (en) 1993-01-01
ATE74725T1 (en) 1992-05-15
JPH0531968Y2 (en) 1993-08-17
DE8800976U1 (en) 1989-06-01
KR940007032Y1 (en) 1994-10-13
KR890015927U (en) 1989-08-18
DE3870209D1 (en) 1992-05-21
GR3004573T3 (en) 1993-04-28
US4899969A (en) 1990-02-13
JPH01117245U (en) 1989-08-08

Similar Documents

Publication Publication Date Title
EP0325726B1 (en) Blockable lifting device for the stepless adjustment of furniture parts, and guiding bush for such a lifting device
EP0635227B1 (en) Chair, particularly office chair
DE2732654C3 (en) Articulated fitting for control panels
EP2910146B1 (en) Frame of an item of furniture, in particular chair or table frame, and chair or a table with such a frame of an item of furniture
DE8422413U1 (en) Length-adjustable gas spring for a lockable lifting device for stepless adjustment of chair seats, table tops or similar pieces of furniture
EP0641532B1 (en) Length adjustable column for chairs, tables or the like
DE3235361A1 (en) LOCKABLE LOCKING DEVICE FOR SEAT PARTS OF SEAT FURNITURE
EP2818360B1 (en) Vehicle seat and commercial motor vehicle with at least one vehicle seat
EP0511500B1 (en) Blockable lifting device for continuously adjusting a seat
DE10116821A1 (en) Adjustable armrest for office chair has locking mechanism released to allow movement of adjustable part in at least 2 directions
DE3806540A1 (en) TILTING ADJUSTMENT FOR SWIVEL CHAIR
DE3413804A1 (en) LOCKABLE LIFTING DEVICE FOR CONTINUOUSLY ADJUSTING CHAIR SEATS, TABLETOP OR SIMILAR FURNITURE
DE2853118B2 (en) Detachable locking device for telescopically interacting members
DE1119135B (en) Articulated fitting for seats with adjustable backrest, especially for motor vehicles
EP0995371A1 (en) Office-chair with a seat adjustable in inclination
EP0133523B1 (en) Lengthwise adjustable gas spring for a lockable lifting device for the infinitely variable positioning of seats, table tops or the like
DE2808381C2 (en) Headrest for a seat, in particular a motor vehicle seat
DE2341790C3 (en) Office swivel chair
EP1161160B1 (en) Telescope-type tubular construction, whose length or height can be adjusted, to be used in particular as a height-adjusting device for office furniture
DE1580609A1 (en) Seat frame, especially for motor vehicles
DE4040268A1 (en) Column for height adjustable chair - has base frame and seat support and has two gas operated springs each located inside pipe, with guide piece
DE1654284C3 (en) Device for tilting the seat surface of a seat
DE2016229A1 (en) Connecting device, in particular for connecting furniture parts to one another
DE7716983U1 (en) LOCKABLE LIFTING DEVICE FOR CONTINUOUSLY ADJUSTMENT OF CHAIR SEATS, TABLE TOPS OR DGL.
DE4319125C2 (en) Adjustable leg for chairs, tables or the like

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI NL SE

17P Request for examination filed

Effective date: 19900113

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SUSPA COMPART AKTIENGESELLSCHAFT

17Q First examination report despatched

Effective date: 19910923

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19920415

Ref country code: BE

Effective date: 19920415

REF Corresponds to:

Ref document number: 74725

Country of ref document: AT

Date of ref document: 19920515

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: ING. C. GREGORJ S.P.A.

REF Corresponds to:

Ref document number: 3870209

Country of ref document: DE

Date of ref document: 19920521

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2031985

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3004573

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19931015

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19931020

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 19931129

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19941107

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19941123

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19941126

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19941130

Ref country code: CH

Effective date: 19941130

EAL Se: european patent in force in sweden

Ref document number: 88119734.7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19950531

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

Ref country code: GR

Ref legal event code: MM2A

Free format text: 3004573

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19951126

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19951127

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19951126

EUG Se: european patent has lapsed

Ref document number: 88119734.7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19961118

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19961129

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19970124

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971127

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19971130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980801

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19981212

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051126