EP0185230B1 - Construction of a supporting arm for dental purposes - Google Patents

Construction of a supporting arm for dental purposes Download PDF

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Publication number
EP0185230B1
EP0185230B1 EP85115074A EP85115074A EP0185230B1 EP 0185230 B1 EP0185230 B1 EP 0185230B1 EP 85115074 A EP85115074 A EP 85115074A EP 85115074 A EP85115074 A EP 85115074A EP 0185230 B1 EP0185230 B1 EP 0185230B1
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EP
European Patent Office
Prior art keywords
supporting arm
tube
arm construction
construction according
profile
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85115074A
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German (de)
French (fr)
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EP0185230A1 (en
Inventor
Helmut Kiesel
Klaus Stöckl
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Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT85115074T priority Critical patent/ATE42036T1/en
Publication of EP0185230A1 publication Critical patent/EP0185230A1/en
Application granted granted Critical
Publication of EP0185230B1 publication Critical patent/EP0185230B1/en
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G15/00—Operating chairs; Dental chairs; Accessories specially adapted therefor, e.g. work stands
    • A61G15/14—Dental work stands; Accessories therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7005—Lugged member, rotary engagement
    • Y10T403/7007—Bayonet joint

Definitions

  • a support arm construction for a dental instrument table in which on a bottom-side vertical support tube (stand) a first and in turn a second horizontal support arm carrying the instrument table at its free end, each by means of a swivel joint are articulated.
  • Such a support arm construction can only be used in the intended arrangement, i.e. the support arm construction shown there with the base-side stand is not readily usable for ceiling mounting.
  • a support arm construction designed for ceiling mounting would not be readily usable for floor mounting.
  • the addition, omission or shortening of support tubes in the known construction is not possible or not possible without complex modification of the construction.
  • the invention specified in claim 1 is based on the object to provide an improved support arm construction. Due to the construction according to the invention of the support arm construction explained in more detail below, it is possible to put together an individual support arm construction with regard to the bends and support tubes to be provided and their lengths, using the same components in each case.
  • FIG. 1 shows a schematic representation of an embodiment of the support arm construction according to the invention for the pivotable mounting of a dental instrument table.
  • the support arm construction consists of a vertical support tube 2 fastened to a base-side stand 1, two horizontal support tubes 3 and 4 as well as pipe bends 5 to 8 for connecting the support tubes to one another or to the instrument table 9. ...._._.._. ..,
  • the support arm construction is provided for ceiling mounting and for this purpose also contains a vertical support pipe 2 'and a pipe bend 5' which is offset by 180 ° with respect to the previously explained arrangement.
  • the support arms 3 and 4 can be pivoted at the points shown by arrows, otherwise the parts are rigid, i.e. non-rotating, connected to each other.
  • an additional height-adjustable support arm can be provided, or the support arm designated by 4 can be designed as a parallelogram support arm.
  • the support tubes 2, 3, 4 have a constant profile, preferably extending over their entire length, which, as will be explained in more detail later, fits a correspondingly designed counter profile on the tube bends 5 to 8, so that a rotationally fixed connection between the pipe bend and the support pipe can be established by axially plugging together.
  • the profile is designed in such a way that the pipe bend can alternatively preferably be used offset by 180 ° with respect to the support tube, so that, as shown in dashed lines in FIG .
  • the profile of the support tubes is shown in Figure 2.
  • the pipe bend consists of a base body 13 (blank), which has a plug pin 14 at one end and a bore 15 at its other end for receiving a pivot pin of a further pipe bend adjoining it (e.g. pipe bend 6).
  • the pivot is axially secured by means of an angle plate 25 screwed onto the base body 13.
  • the plug pin 14 is provided with a counter profile matching the profile according to FIG. on the spigot 14 there are also on the one hand four evenly distributed longitudinal grooves 16 that fit the elevations 11 of the support tube profile, and intermediate webs 17 that match the longitudinal grooves 12 of the support tube profile.
  • connection of the pipe bend 5 or 5 'to the vertical support pipe 2 or 2' is explained in more detail with reference to FIGS. 9 and 10.
  • This connection is a rotatable connection, i.e. the pipe bend can be rotated around 360 ° around the support pipe.
  • Such a connection can also exist between the arch 7 and the arch 6.
  • a pipe 26 protruding in the form of a pin is screwed or otherwise fastened into the bore 15 according to FIG.
  • a plastic bushing 27 is placed thereon and axially secured by means of washer 28 and spring ring 29.
  • the plastic bushing 27 together with the tube 26 forms a slide bearing, i.e. the socket is freely rotatable relative to the tube 26.
  • circumferentially arranged locking elements are designated, which correspond in profile to the profile of the pin 14 at the other end of the bend, so that they match the tubular profile shown in FIG. As shown in FIG.
  • the tube contains a recess or undercut 31, the depth of which corresponds to that of the latching elements 30, so that when tube 2 and bend 5 are joined together, the parts are inserted axially via the recesses 12 and after the two parts are rotated Bayonet-like connection is created, which absorbs the axial forces when suspended.
  • a set screw 32 can be provided in the support tube 2, which engages in a thread or in a blind hole 33 in the plastic bushing 27 and thus prevents the bayonet connection from being unscrewed.
  • the turning range can be limited to a maximum of 360 °, e.g. in the form of a stop pin or the like. Be present, which are then attached at the point marked 34 in the support tube and at a corresponding point in the tube 26.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Coloring Foods And Improving Nutritive Qualities (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

The present invention is directed to a bracket structure which has one or more tubular members interconnected by elbow members. At least one of the tubular members is connected to an elbow member by a plug-type connection having a socket receiving a pin part with the socket and pin part being constructed so that no twisting will occur between the two parts in the assembled position but the two parts can be disassembled and reassembled with the position of the parts being rotated through at least 180 DEG relative to each other. This provides the advantage of enabling easy changing of the bracket from being adapted for a floor mounting to a ceiling mounting.

Description

Aus der US-A-39 02 246 ist eine Tragarmkonstruktion für einen zahnärztlichen Instrumententisch bekannt, bei der an einem bodenseitig befestigbaren vertikalen Tragrohr (Ständer) ein erster und an diesem wiederum ein an seinem freien Ende den Instrumententisch tragender zweiter horizontaler Tragarm jeweils mittels eines Drehgelenks angelenkt sind. Eine solche Tragarmkonstruktion ist nur in der vorgesehenen Anordnung verwendbar, d.h. die dort aufgezeigte Tragarmkonstruktion mit dem bodenseitigen Ständer ist nicht ohne weiteres verwendbar für eine Deckenbefestigung. Umgekehrt wäre eine zur Deckenbefestigung ausgebildete Tragarmkonstruktion nicht ohne weiteres für eine Bodenbefestigung einsetzbar. Des weiteren ist das Hinzufügen, Weglassen oder Kürzen von Tragrohren bei der bekannten Konstruktion nicht bzw. nicht ohne aufwendige Änderung der Konstruktion möglich.From US-A-39 02 246 a support arm construction for a dental instrument table is known, in which on a bottom-side vertical support tube (stand) a first and in turn a second horizontal support arm carrying the instrument table at its free end, each by means of a swivel joint are articulated. Such a support arm construction can only be used in the intended arrangement, i.e. the support arm construction shown there with the base-side stand is not readily usable for ceiling mounting. Conversely, a support arm construction designed for ceiling mounting would not be readily usable for floor mounting. Furthermore, the addition, omission or shortening of support tubes in the known construction is not possible or not possible without complex modification of the construction.

Der im Anspruch 1 angegebenen Erfindung liegt die Aufgabe zugrunde, demgegenüber eine verbesserte Tragarmkonstruktion anzugeben. Durch den erfindungsgemässen Aufbau der nachfolgend näher erläuterten Tragarmkonstruktion ist es möglich, hinsichtlich vorzusehender Bogen und Tragrohre und deren Längen, unter Verwendung jeweils gleicher Bauteile, eine individuelle Tragarmkonstruktion zusammenzustellen.The invention specified in claim 1 is based on the object to provide an improved support arm construction. Due to the construction according to the invention of the support arm construction explained in more detail below, it is possible to put together an individual support arm construction with regard to the bends and support tubes to be provided and their lengths, using the same components in each case.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnung näher erläutert.An embodiment of the invention is explained below with reference to the drawing.

Es zeigen:

  • Figur 1 die erfindungsgemässe Tragarmkonstruktion alternativ für Boden- oder Deckenbefestigung verwendbar,
  • Figur 2 den Querschnitt eines Tragrohres,
  • Figur 3 einen Teil des Rohrbogens im Längsschnitt,
  • Figur 4 eine Frontansicht auf den Rohrbogen nach Figur 3,
  • Figur 5 eine obere Verkleidungshalbschale für den Rohrbogen nach Figur 3,
  • Figur 6 eine Frontansicht von der oberen Verkleidungshalbschale,
  • Figur 7 eine untere Verkleidungshalbschale für den Rohrbogen nach Figur 3 im Längsschnitt,
  • Figur 8 eine Frontansicht von der unteren Verkleidungshalbschale,
  • Figur 9 das eine Ende eines Rohrbogens in schaubildlicher Ansicht,
  • Figur 10 das zu Figur 9 passende Ende eines Tragrohres.
Show it:
  • FIG. 1 the support arm construction according to the invention can alternatively be used for floor or ceiling fastening,
  • FIG. 2 shows the cross section of a support tube,
  • FIG. 3 shows part of the pipe bend in longitudinal section,
  • FIG. 4 shows a front view of the pipe bend according to FIG. 3,
  • FIG. 5 shows an upper cladding half-shell for the pipe bend according to FIG. 3,
  • FIG. 6 shows a front view of the upper cladding half-shell,
  • FIG. 7 shows a lower cladding half-shell for the pipe bend according to FIG. 3 in longitudinal section,
  • FIG. 8 shows a front view of the lower cladding half-shell,
  • FIG. 9 shows one end of a pipe bend in a diagrammatic view,
  • Figure 10 shows the end of a support tube matching Figure 9.

Die Figur 1 zeigt in einer schematischen Darstellung eine Ausführungsform der erfindungsgemässen Tragarmkonstruktion zur schwenkbaren Halterung eines zahnärztlichen Instrumententisches. Die Tragarmkonstruktion besteht aus einem an einem bodenseitigen Ständer 1 befestigten vertikalen Tragrohr 2, zwei jeweils waagerechten Tragrohren 3 und 4 sowie Rohrbogen 5 bis 8 zur Verbindung der Tragrohre untereinander bzw. mit dem Instrumententisch 9. ...._._.._...,FIG. 1 shows a schematic representation of an embodiment of the support arm construction according to the invention for the pivotable mounting of a dental instrument table. The support arm construction consists of a vertical support tube 2 fastened to a base-side stand 1, two horizontal support tubes 3 and 4 as well as pipe bends 5 to 8 for connecting the support tubes to one another or to the instrument table 9. ...._._.._. ..,

bei der unter Verwendung gleicher Bauteile die Tragarmkonstruktion für eine Deckenmontage vorgesehen ist und zu diesem Zweck ebenfalls ein vertikales Tragrohr 2' und einen gegenüber der zuvor erläuterten Anordnung um 180° versetzt dazu angeordneten Rohrbogen 5' enthält.in which, using the same components, the support arm construction is provided for ceiling mounting and for this purpose also contains a vertical support pipe 2 'and a pipe bend 5' which is offset by 180 ° with respect to the previously explained arrangement.

Die Tragarme 3 und 4 können an den durch Pfeilen gezeichneten Stellen geschwenkt werden, ansonsten sind die Teile starr, d.h. verdrehsicher, miteinander verbunden. Um eine gewisse Höhenverstellung des Instrumententisches 9 zu ermöglichen, kann entweder ein zusätzlicher höhenverstellbarer Tragarm vorgesehen oder auch der mit 4 bezeichnete Tragarm als Parallelogrammtragarm ausgebildet sein.The support arms 3 and 4 can be pivoted at the points shown by arrows, otherwise the parts are rigid, i.e. non-rotating, connected to each other. In order to enable a certain height adjustment of the instrument table 9, either an additional height-adjustable support arm can be provided, or the support arm designated by 4 can be designed as a parallelogram support arm.

Ein wesentliches Kennzeichen der Tragarmkonstruktion ist, dass die Tragrohre 2, 3, 4 ein bevorzugt sich über ihre gesamte Länge erstreckendes, gleichbleibendes Profil aufweisen, das, wie später noch näher erläutert, zu einem entsprechend ausgebildeten Gegenprofil an den Rohrbogen 5 bis 8 passt, so dass durch axiales Zusammenstecken eine drehfeste Verbindung zwischen Rohrbogen und Tragrohr hergestellt werden kann. Das Profil ist so ausgebildet, dass der Rohrbogen alternativ vorzugsweise um jeweils 180° versetzt gegenüber dem Tragrohr eingesetzt werden kann, so dass, wie in Figur 1 gestrichelt dargestellt, der Bogen mit seinem einen Ende alternativ nach oben oder unten gerichtet im Tragrohr montiert werden kann. Das Profil der Tragrohre ist in Figur 2 dargestellt. Es wird gebildet durch ein Rohr mit zylindrischer äusserer Mantelfläche und vier am Umfang gleichmässig verteilt und über die gesamte Länge des Tragrohres sich erstreckenden inneren Erhebungen 11 und dazwischenliegenden Vertiefungen 12, die achsparallel verlaufende Stege und dazwischenliegende Nuten bilden. Ein entsprechendes Gegenprofil weist das eine Ende der Rohrbogen 5 bis 8 auf, wie dies anhand der Figuren 3 und 4 am Beispiel des Rohrbogens 7 erläutert wird. Der Rohrbogen besteht aus einem Grundkörper 13 (Rohling), der an seinem einen Ende einen Steckzapfen 14 und an seinem anderen Ende eine Bohrung 15 zur Aufnahme eines Drehzapfens eines sich daran anschliessenden weiteren Rohrbogens (z.B. Rohrbogen 6) aufweist. Der Drehzapfen ist mittels eines auf den Grundkörper 13 aufgeschraubten Winkelbleches 25 axial gesichert. Der Steckzapfen 14 ist mit einem zum Profil gemäss Figur 2 passenden Gegenprofil versehen, d.h. am Steckzapfen 14 sind ebenfalls einerseits vier gleichmässig am Umfang verteilte Längsnuten 16, die zu den Erhebungen 11 des Tragrohrprofils passen, und dazwischenliegende Stege 17, die zu den Längsnuten 12 des Tragrohrprofils passen, vorhanden.An essential characteristic of the support arm construction is that the support tubes 2, 3, 4 have a constant profile, preferably extending over their entire length, which, as will be explained in more detail later, fits a correspondingly designed counter profile on the tube bends 5 to 8, so that a rotationally fixed connection between the pipe bend and the support pipe can be established by axially plugging together. The profile is designed in such a way that the pipe bend can alternatively preferably be used offset by 180 ° with respect to the support tube, so that, as shown in dashed lines in FIG . The profile of the support tubes is shown in Figure 2. It is formed by a tube with a cylindrical outer circumferential surface and four evenly distributed on the circumference and over the entire length of the support tube extending inner elevations 11 and intermediate recesses 12 which form axially parallel webs and grooves in between. A corresponding counter profile has one end of the pipe bends 5 to 8, as will be explained with reference to FIGS. 3 and 4 using the example of the pipe bend 7. The pipe bend consists of a base body 13 (blank), which has a plug pin 14 at one end and a bore 15 at its other end for receiving a pivot pin of a further pipe bend adjoining it (e.g. pipe bend 6). The pivot is axially secured by means of an angle plate 25 screwed onto the base body 13. The plug pin 14 is provided with a counter profile matching the profile according to FIG. on the spigot 14 there are also on the one hand four evenly distributed longitudinal grooves 16 that fit the elevations 11 of the support tube profile, and intermediate webs 17 that match the longitudinal grooves 12 of the support tube profile.

Im Bereich des Bogens enthält der Grundkörper 13 eine Ausnehmung 18, die einen Zugang zum Rohrinneren verschafft, wodurch z.B. im Inneren verlegte Leitungen leichter ausgewechselt werden können. Die Mantelfläche des an sich unbearbeiteten Grundkörpers 13 wird bedeckt durch zwei in den Figuren 5 bis 8 dargestellte Kunststoffhalbschalen, einer oberen Halbschale 19 (Figur 5) und einer unteren Halbschale 20 (Figur 7). Die beiden Halbschalen 19 und 20 enthalten geeignete Kupplungselemente 21, 22, die beim Aufsetzen der Halbschalen auf den Grundkörper 13 miteinander in Eingriff kommen. Solche vorzugsweise als Schnappverbindungselemente ausgebildeten Kupplungselemente sind an sich bekannt. Die untere Halbschale 20 kann durch geeignete Befestigungsmittel, z.B. ebenfalls in Form von Schnappelementen 23, 24, am Grundkörper 13 befestigt sein. Im aufgesetzten Zustand wird durch die Halbschale 19 die Ausnehmung 18 im Grundkörper 13 verdeckt. Ein wesentlicher Vorteil dieses Aufbaus ist, dass die Oberfläche des Grundkörpers 13 nicht fein bearbeitet zu werden braucht, da die beiden Halbschalen 19 und 20 als sehr billig herzustellende Kunststoffspritzteile bereits die notwendige Oberflächenbeschaffenheit aufweisen können. Ein weiterer Vorteil liegt darin, dass unterschiedliche Wünsche des Kunden in der Farbgestaltung bereits in der Erstellung der Kunststoffhalbschalen berücksichtigt werden können, so dass aufwendige Lackierarbeiten am Rohrbogen selbst entfallen. Ein weiterer Vorteil liegt, wie bereits erwähnt, darin, dass in der gesamten Tragarmkonstruktion verlegte Leitungen sehr leicht auch nachträglich verlegt bzw. ausgewechselt werden können, weil durch Abnehmen der oberen Halbschale 19 gerade im kritischen Bereich des Rohrbogens über die Ausnehmung 18 ein guter Zugang zu den im Inneren verlegten Leitungen gegeben ist.In the area of the bend, the base body 13 contains a recess 18, which provides access to the inside of the pipe, as a result of which, for example, lines laid inside can be replaced more easily. The outer surface of the basic body 13, which is not machined per se, is covered by two art shown in FIGS half-shells, an upper half-shell 19 (Figure 5) and a lower half-shell 20 (Figure 7). The two half-shells 19 and 20 contain suitable coupling elements 21, 22 which come into engagement with one another when the half-shells are placed on the base body 13. Such coupling elements, which are preferably designed as snap connection elements, are known per se. The lower half-shell 20 can be fastened to the base body 13 by suitable fastening means, for example also in the form of snap elements 23, 24. In the attached state, the recess 18 in the base body 13 is covered by the half-shell 19. A major advantage of this construction is that the surface of the base body 13 does not need to be finely machined, since the two half-shells 19 and 20 can already have the necessary surface properties as plastic injection-molded parts which can be produced very cheaply. Another advantage is that the customer's different color requirements can be taken into account in the creation of the plastic half-shells, so that time-consuming painting work on the elbow itself is no longer necessary. Another advantage, as already mentioned, is that cables that are installed in the entire support arm construction can also be very easily retrofitted or replaced, because by removing the upper half-shell 19, good access to the recess 18 in the critical area of the pipe bend the cables laid inside are given.

Anhand der Figuren 9 und 10 wird die Verbindung des Rohrbogens 5 bzw. 5' mit dem senkrechten Tragrohr 2 bzw. 2' näher erläutert. Diese Verbindung ist eine drehbare Verbindung, d.h. der Rohrbogen kann um etwa 360° um das Tragrohr gedreht werden. Eine solche Verbindung kann auch zwischen dem Bogen 7 und dem Bogen 6 bestehen.The connection of the pipe bend 5 or 5 'to the vertical support pipe 2 or 2' is explained in more detail with reference to FIGS. 9 and 10. This connection is a rotatable connection, i.e. the pipe bend can be rotated around 360 ° around the support pipe. Such a connection can also exist between the arch 7 and the arch 6.

In die Bohrung 15 nach Figur 3 ist ein zapfenförmig vorstehendes Rohr 26 eingeschraubt oder anderweitig befestigt. Darauf ist eine Kunststoffbuchse 27 aufgesetzt und mittels Scheibe 28 und Federring 29 axial gesichert. Die Kunststoffbuchse 27 bildet zusammen mit dem Rohr 26 ein Gleitlager, d.h. die Buchse ist gegenüber dem Rohr 26 frei drehbar. Mit 30 sind am Umfang vorstehend angeordnete Rastelemente bezeichnet, die im Profil dem Profil des Zapfens 14 am anderen Ende des Bogens entsprechen, so dass sie zu dem in Figur 2 gezeigten Rohrprofil passen. Das Rohr enthält, wie in Figur 10 dargestellt, eine Ausdrehung oder Hinterdrehung 31, deren Tiefenmass dem der Rastelemente 30 entspricht, so dass beim Zusammenfügen von Rohr 2 und Bogen 5 nach axialem Einführen der Teile über die Vertiefungen 12 und nach Verdrehen der beiden Teile eine bajonettartige Verbindung zustande kommt, welche bei hängender Montage die Axialkräfte aufnimmt. Zur Sicherung der Verbindung kann im Tragrohr 2 eine Stellschraube 32 vorgesehen sein, die in ein Gewinde oder in eine Sackbohrung 33 in der Kunststoffbuchse 27 eingreift und so ein Ausdrehen der Bajonettverbindung verhindert.A pipe 26 protruding in the form of a pin is screwed or otherwise fastened into the bore 15 according to FIG. A plastic bushing 27 is placed thereon and axially secured by means of washer 28 and spring ring 29. The plastic bushing 27 together with the tube 26 forms a slide bearing, i.e. the socket is freely rotatable relative to the tube 26. At 30 circumferentially arranged locking elements are designated, which correspond in profile to the profile of the pin 14 at the other end of the bend, so that they match the tubular profile shown in FIG. As shown in FIG. 10, the tube contains a recess or undercut 31, the depth of which corresponds to that of the latching elements 30, so that when tube 2 and bend 5 are joined together, the parts are inserted axially via the recesses 12 and after the two parts are rotated Bayonet-like connection is created, which absorbs the axial forces when suspended. To secure the connection, a set screw 32 can be provided in the support tube 2, which engages in a thread or in a blind hole 33 in the plastic bushing 27 and thus prevents the bayonet connection from being unscrewed.

Um ein Überdrehen der beiden Teile 2 und 5 zu verhindern, können den Drehbereich auf maximal 360° begrenzende Anschläge, z.B. in Form von einem Anschlagstift od.dgl., vorhanden sein, die dann an der mit 34 gekennzeichneten Stelle im Tragrohr und an korrespondierender Stelle im Rohr 26 angebracht sind.To prevent overtightening of the two parts 2 and 5, the turning range can be limited to a maximum of 360 °, e.g. in the form of a stop pin or the like. Be present, which are then attached at the point marked 34 in the support tube and at a corresponding point in the tube 26.

Claims (9)

1. Supporting arm construction assembled from one or more straight bracing tubes and one or more tube bends, characterised in that the bracing tube (2 to 4) and tube bend (5 to 8) have an insertion profile adapted to each other (Figure 2), which is constructed in such a way that a torsionally strong connection of the parts (5, 3; 3, 6; 7, 4; 4, 8) is made possible in positions displaced by 180° or a smaller angle.
2. Supporting arm construction according to claim 1, characterised in that the profile (Figure 2) contains four bars and slots which are arranged evenly distributed on the perimeter, are formed by projections (11,17) and cavities (12,16) and run lengthwise.
3. Supporting arm construction according to claim 1 or 2, characterised in that the bracing tube (2 to 4) has a continuous profile which stretches along its entire length (Figure 2).
4. Supporting arm construction according to one of claims 1 to 3, characterised in that the tube bend (5, 7, 8) is provided at one end with an insertion pin (14) having the profile (16,17) and at the other end with a receiving hole (15) for a turning pin (26).,
5. Supporting arm construction according to claim 4, characterised in that the tube bend (5 to 8) is formed by a basic body (13) with overlaid half shells (19, 20) which cover the outer surface.
6. Supporting arm construction according to claim 5, characterised in that the basic body (13) contains a recess (18) in the region of the bend.
7. Supporting arm construction according to claim 5, characterised in that the half shells (19, 20) are connected with each other by means of clip elements (21, 22).
8. Supporting arm construction according to one of claims 4 to 7, characterised in that a tube (27), which is provided with bayonet coupling links (30) adapted to the profile (Figure 2) and can be freely turned with respect to the turning pin (26), is placed on the turning pin (26) and axially secured (Figure 9), and in that the bracing tube (2) which is to be connected to the tube bend (5) contains corresponding opposite links (31 ) on at least the end on the connecting side.
9. Supporting arm construction according to claim 8, characterised in that the opposite links (31 ) are formed by a recess or relief of the profile (11,12).
EP85115074A 1984-12-10 1985-11-27 Construction of a supporting arm for dental purposes Expired EP0185230B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85115074T ATE42036T1 (en) 1984-12-10 1985-11-27 SUPPORT ARM CONSTRUCTION FOR DENTAL PURPOSES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3445020 1984-12-10
DE3445020 1984-12-10

Publications (2)

Publication Number Publication Date
EP0185230A1 EP0185230A1 (en) 1986-06-25
EP0185230B1 true EP0185230B1 (en) 1989-04-12

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EP85115074A Expired EP0185230B1 (en) 1984-12-10 1985-11-27 Construction of a supporting arm for dental purposes

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US (1) US4714222A (en)
EP (1) EP0185230B1 (en)
JP (1) JPH0352505Y2 (en)
AT (1) ATE42036T1 (en)
DE (1) DE3569330D1 (en)
YU (1) YU188485A (en)

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Also Published As

Publication number Publication date
DE3569330D1 (en) 1989-05-18
JPS61103110U (en) 1986-07-01
JPH0352505Y2 (en) 1991-11-14
US4714222A (en) 1987-12-22
EP0185230A1 (en) 1986-06-25
ATE42036T1 (en) 1989-04-15
YU188485A (en) 1988-08-31

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