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EP0088957A2 - Dental treatment chair - Google Patents

Dental treatment chair Download PDF

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Publication number
EP0088957A2
EP0088957A2 EP83102087A EP83102087A EP0088957A2 EP 0088957 A2 EP0088957 A2 EP 0088957A2 EP 83102087 A EP83102087 A EP 83102087A EP 83102087 A EP83102087 A EP 83102087A EP 0088957 A2 EP0088957 A2 EP 0088957A2
Authority
EP
European Patent Office
Prior art keywords
spindle
headrest
treatment chair
chair according
head support
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
EP83102087A
Other languages
German (de)
French (fr)
Other versions
EP0088957B1 (en
EP0088957A3 (en
Inventor
Klaus Stöckl
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0088957A2 publication Critical patent/EP0088957A2/en
Publication of EP0088957A3 publication Critical patent/EP0088957A3/en
Application granted granted Critical
Publication of EP0088957B1 publication Critical patent/EP0088957B1/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
    • A61G15/10—Parts, details or accessories
    • A61G15/12—Rests specially adapted therefor, e.g. for the head or feet
    • A61G15/125—Head-rests

Definitions

  • the invention relates to a dental treatment chair, on the back of which is supported by means of a support member a headrest which is displaceable in the longitudinal axis of the backrest, which can be adjusted in various inclination positions by means of an adjusting device about a horizontal transverse axis, locked in these positions, and unlocked again by means of a trigger element which can be actuated by hand is.
  • a headrest for a dental treatment chair in which two mutually engaging by spring force, and disengageable by pressing a button toothed coupling members are available, one of which with the headrest housing and the other with the backrest or the support member is connected.
  • a disadvantage of such a construction is that when the headrest is loaded, ie when a patient is in the chair and the head rests on the headrest, the device is relatively difficult to unlock.
  • Unlocking the device can only be facilitated by relieving the headrest.
  • the headrest requires two-hand operation; the release link must be operated with one hand and the headrest must be held against tipping over with the other hand.
  • Another disadvantage is that only a stepped, so no stepless adjustment of the headrest is possible through the teeth.
  • the object of the present invention is to provide a treatment chair with a headrest adjustment which is improved in comparison therewith, which enables stepless adjustment in one-hand operation even in a loaded condition without great effort on the part of the operator.
  • the support member has at its end receiving the transverse axis a lever arm forming attachment to which a rod that can be subjected to tension and pressure is articulated, and that in the headrest housing is motorized driven, by means of the trigger member on and off, with self-locking and connected to the push and pull rod adjustment means are arranged.
  • an electric motor as the adjusting means, which drives a spindle arranged in the headrest housing, on which a spindle nut is placed, which is connected to the pull and push rod via a lever.
  • FIG. 1 shows a dental treatment chair, on the backrest 1 of which a headrest 2 can be pulled out by means of a support member 3, i.e. is adjustable in the direction of arrow 4.
  • a support member 3 i.e. is adjustable in the direction of arrow 4.
  • the support member 3 is held in the backrest in a known manner by means of a suitable longitudinal guide.
  • Fig. 2 which shows a top view of the headrest 2 with the cushion cover removed, reveals the inner structure of the adjusting device, with which an adjustment of the headrest in different inclination positions in the direction of arrow 5 in Fig. 1 is made possible.
  • a spindle 7 is rotatably mounted, which is driven by a belt 8 by an electric motor 9 fastened there approximately in the middle of the housing.
  • a spindle nut 10 which, as can be seen from FIG. 3, is secured against rotation via a tongue and groove guide 11.
  • a rocker arm 12 is seated on the nut 10 and is pivotably mounted on the opposite longitudinal side of the headrest 2 by means of a bearing 13.
  • a pull rod 15 is mounted by means of a further bearing 14, which is articulated on an extension of the support member 3, designated 16.
  • Fig. 4 shows that the axle bearing 17 of the pull and push rod 15 on the attachment part 16 to the bearing axis 18, with which the headrest housing 6 is articulated on the support member 3, forms a lever arm a.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)

Abstract

1. A dental treatment chair, on whose back rest (1) a head support (2) is mounted by means of a supporting element (3) and is displaceable along the longitudinal axis of the back rest and is rotatable about a horizontal transverse axis (18) between different positions of inclination by means of an adjusting device which is arranged in the casing (6) of the head support, which head support can be locked in said positions and unlocked by means of a manually operated releasing element (20) characterised in that the adjusting device comprises an electric motor (9) which can be switched on and off by means of the releasing element (20) and includes a spindle (7) which is arranged in the casing (6) of the head support in the longitudinal direction thereof and driven by the motor (9), and a spindle nut (10) which engages with said spindle and upon which a rocker arm (12), which is arranged transversely to the longitudinal direction of the casing (6) of the head support, acts, which rocker arm (12) is pivotably mounted (13) on the side of the casing (6) of the head support opposite the spindle (7), and that there is arranged a push/pull rod (15) which is articulated firstly to the rocker arm (12) so as to be adjacent to the swivel bearing (13) and secondly to an attachment (16) to the supporting element (3) at a distance (a) from the transverse axis (18) to form a moment arm (a).

Description

Die Erfindung bezieht sich auf einen zahnärztlichen Behandlungsstuhl, an dessen Rückenlehne mittels eines Stützgliedes eine in Rückenlehnenlängsachse verschiebbare Kopfstütze gehaltert ist, welche mittels einer Verstellvorrichtung um eine horizontale Querachse in verschiedenen Neigungslagen einstellbar, in diesen Positionen arretierbar, und mittels eines von Hand betätigbaren Auslösegliedes wieder entriegelbar ist.The invention relates to a dental treatment chair, on the back of which is supported by means of a support member a headrest which is displaceable in the longitudinal axis of the backrest, which can be adjusted in various inclination positions by means of an adjusting device about a horizontal transverse axis, locked in these positions, and unlocked again by means of a trigger element which can be actuated by hand is.

Aus der DE-OS 20 47 720 ist eine Kopfstütze für einen zahnärztlichen Behandlungsstuhl bekannt, bei der zwei miteinander durch Federkraft in Eingriff stehende, und durch Knopfdruck außer Eingriff bringbare verzahnte Kupplungsglieder vorhanden sind, von denen eines mit dem Kopfstützengehäuse und das andere mit der Rückenlehne bzw. dem Stützglied verbunden ist.From DE-OS 20 47 720 a headrest for a dental treatment chair is known, in which two mutually engaging by spring force, and disengageable by pressing a button toothed coupling members are available, one of which with the headrest housing and the other with the backrest or the support member is connected.

Nachteilig bei einer solchen Konstruktinn ist, daß bei belasteter Kopfstütze, wenn sich also ein Patient im Stuhl befindet und der Kopf auf der Kopfstütze aufliegt, die Vorrichtung relativ schwer entriegelbar ist.A disadvantage of such a construction is that when the headrest is loaded, ie when a patient is in the chair and the head rests on the headrest, the device is relatively difficult to unlock.

Das Entriegeln der Vorrichtung kann also nur durch Entlasten der Kopfstütze erleichtert werden. Ein weiterer Nachteil ist darin zu sehen, daß die Kopfstütze eine Zweihandbedienung erfordert; mit der einen Hand ist das Auslöseglied zu betätigen, mit der anderen Hand muß die Kopfstütze gegen Nachhintenkippen gehalten werden. Als weiterer Nachteil kommt hinzu, daß durch die Verzahnung nur eine stufenförmige, also keine stufenlose Verstellung der Kopfstütze möglich ist.Unlocking the device can only be facilitated by relieving the headrest. Another disadvantage is that the headrest requires two-hand operation; the release link must be operated with one hand and the headrest must be held against tipping over with the other hand. As Another disadvantage is that only a stepped, so no stepless adjustment of the headrest is possible through the teeth.

Aufgabe der vorliegenden Erfindung ist es, einen Behandlungsstuhl mit einer demgegenüber verbesserten Kopfstützenverstellung anzugeben, die eine stufenlose Verstellung in Einhandbedienung auch in belastetem Zustand ohne größeren Kraftaufwand für die Bedienungsperson ermöglicht.The object of the present invention is to provide a treatment chair with a headrest adjustment which is improved in comparison therewith, which enables stepless adjustment in one-hand operation even in a loaded condition without great effort on the part of the operator.

Das gestellte Ziel wird bei einem Behandlungsstuhl der eingangs genannten Gattung gemäß der Erfindung dadurch gelöst, daß das Stützglied an seinem die Querachse aufnehmenden Ende einen einen Hebelarm bildenden Ansatz aufweist, an dem eine auf Zug und Druck beaufschlagbare Stange angelenkt ist, und daß im Kopfstützengehäuse motorisch angetriebene, mittels des Auslösegliedes ein-und ausschaltbare, mit einer Selbsthemmung versehene und mit der Druck- und Zugstange verbundene Verstellmittel angeordnet sind.The object is achieved in a treatment chair of the type mentioned according to the invention in that the support member has at its end receiving the transverse axis a lever arm forming attachment to which a rod that can be subjected to tension and pressure is articulated, and that in the headrest housing is motorized driven, by means of the trigger member on and off, with self-locking and connected to the push and pull rod adjustment means are arranged.

Besonders vorteilhaft ist es, als Verstellmittel einen Elektromotor vorzusehen, der eine im Kopfstützengehäuse angeordnete Spindel antreibt, auf der eine Spindelmutter aufgesetzt ist, die über einen Hebel mit der Zug- und Druckstange verbunden ist.It is particularly advantageous to provide an electric motor as the adjusting means, which drives a spindle arranged in the headrest housing, on which a spindle nut is placed, which is connected to the pull and push rod via a lever.

Weitere vorteilhafte Ausgestaltungen und Weiterbildungen sind in den Unteransprüchen enthalten. Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. Es zeigen:

  • Fig. 1 einen zahnärztlichen Behandlungsstuhl in einer Seitenansicht,
  • Fig. 2 die Kopfstütze und einen Teil des Stützgliedes in der Draufsicht bei abgenommener Polsterauflage,
  • Fig. 3 einen Querschnitt entlang der Linie II-II nach .Fig. 2,
  • Fig. 4 einen Längsschnitt entlang der Linie IV-IV in Fig. 2,
  • Fig. 5 einen Querschnitt entlang der Linie 111-111 nach Fig. 2.
Further advantageous refinements and developments are contained in the subclaims. An embodiment of the invention is explained below with reference to the drawing. Show it:
  • 1 is a side view of a dental treatment chair,
  • 2 the headrest and part of the support member in plan view with the cushion cover removed,
  • Fig. 3 shows a cross section along the line II-II according to .Fig. 2,
  • 4 shows a longitudinal section along the line IV-IV in FIG. 2,
  • 5 shows a cross section along the line 111-111 of FIG. 2nd

Die Fig. 1 zeigt .einen zahnärztlichen Behandlungsstuhl, an dessen Rückenlehne 1 eine Kopfstütze 2 mittels eines Stützgliedes 3 ausziehbar, d.h. in Richtung des Pfeiles 4 verstellbar gehaltert ist. Das Stützglied 3 ist hierzu in bekannter Weise mittels einer geeigneten Längsführung in der Rückenlehne gehaltert.1 shows a dental treatment chair, on the backrest 1 of which a headrest 2 can be pulled out by means of a support member 3, i.e. is adjustable in the direction of arrow 4. For this purpose, the support member 3 is held in the backrest in a known manner by means of a suitable longitudinal guide.

Die Fig. 2, die eine Draufsicht auf die Kopfstütze 2 bei abgenommener Polsterauflage zeigt, läßt den Innenaufbau der Verstellvorrichtung erkennen, mit der eine Verstellung der Kopfstütze in verschiedenen Neigungslagen in Richtung des Pfeiles 5 in Fig. 1 ermöglicht wird.Fig. 2, which shows a top view of the headrest 2 with the cushion cover removed, reveals the inner structure of the adjusting device, with which an adjustment of the headrest in different inclination positions in the direction of arrow 5 in Fig. 1 is made possible.

Im Gehäuse 6 der Kopfstütze 2, und zwar auf der linken Längsseite, ist eine Spindel 7 drehbar gelagert, die über einen Riemen 8 von einem etwa mittig des Gehäuses dort befestigten Elektromotor 9 angetrieben wird. Auf der Spindel 7 sitzt eine Spindelmutter 10, die, wie aus Fig. 3 ersichtlich ist, über eine Nut/Federführung 11 gegen Verdrehung gesichert ist. Auf der Mutter 10 sitzt ein Kipphebel 12 auf, der an der gegenüberliegenden Längsseite der Kopfstütze 2 mittels einer Lagerung 13 kippbar gelagert ist. Unmittelbar benachbart der Lagerung 13 ist mittels einer weiteren Lagerung 14 eine Zugstange 15 gelagert, die an einem mit 16 bezeichneten Ansatz des Stützgliedes 3 angelenkt ist.In the housing 6 of the headrest 2, namely on the left longitudinal side, a spindle 7 is rotatably mounted, which is driven by a belt 8 by an electric motor 9 fastened there approximately in the middle of the housing. On the Spindle 7 has a spindle nut 10 which, as can be seen from FIG. 3, is secured against rotation via a tongue and groove guide 11. A rocker arm 12 is seated on the nut 10 and is pivotably mounted on the opposite longitudinal side of the headrest 2 by means of a bearing 13. Immediately adjacent to the bearing 13, a pull rod 15 is mounted by means of a further bearing 14, which is articulated on an extension of the support member 3, designated 16.

Die Fig. 4 läßt erkennen, daß die Achslagerung 17 der Zug- und Druckstange 15 am Ansatzteil 16 zur Lagerachse 18, mit welcher das Kopfstützengehäuse 6 am Stützglied 3 angelenkt ist, einen Hebelarm a bildet.Fig. 4 shows that the axle bearing 17 of the pull and push rod 15 on the attachment part 16 to the bearing axis 18, with which the headrest housing 6 is articulated on the support member 3, forms a lever arm a.

Wenn der Elektromotor mit Hilfe eines an einer geeigneten Stelle der Kopfstütze angeordneten Schalters 20 in der einen oder anderen Drehrichtung eingeschaltet wird, wird die Spindelmutter 10 längs der Spindel 7 bewegt. Angenommen, die Spindelmutter wird in Betrachtung der Fig. 2 nach oben bewegt, so wird zwangsläufig der Kipphebel 12 um die Achslagerung 13 nach oben gekippt, durch die Anlenkung der Zugstange 15 am Hebel 12. Die Zugstange 15 wird ebenfalls nach oben bewegt, wodurch über den Hebelarm a die Kopfstütze nach vorne bewegt wird. Umgekehrt, wenn die Spindelmutter nach unten bewegt wird, wird über den Hebel 12 die Zugstange nach unten gedrückt, wodurch die Kopfstütze nach rückwärts geneigt wird. Die Endstellungen sind durch Entschalter 21,22 begrenzt, welche durch an der Spindelmutter angeordnete Anschlagteile 23 betätigt werden.When the electric motor is switched on in one or the other direction of rotation by means of a switch 20 arranged at a suitable position of the headrest, the spindle nut 10 is moved along the spindle 7. Assuming that the spindle nut is moved upward in view of FIG. 2, the rocker arm 12 is inevitably tilted upward about the axle bearing 13 by the articulation of the pull rod 15 on the lever 12. The pull rod 15 is also moved upwards, thereby over the lever arm a the headrest is moved forward. Conversely, when the spindle nut is moved down, the pull rod is pressed down via the lever 12, as a result of which the headrest is tilted backwards. The end positions are limited by switches 21, 22, which are actuated by stop parts 23 arranged on the spindle nut.

Claims (7)

1. Zahnärztlicher Behandlungsstuhl, an dessen Rückenlehne (1) mittels eines Stützgliedes (3) eine in Rückenlehnenlängsachse verschiebbare Kopfstütze (2) gehaltert ist, welche mittels einer Verstellvorrichtung um eine horizontale Querachse (18) in verschiedenen Neigungslagen einstellbar, in diesen Positionen arretierbar, und mittels eines von Hand betätigbaren Auslösegliedes (20) wieder entriegelbar ist, dadurch gekennzeichnet , daß im Kopfstützengehäuse (6) ein mittels des Auslösegliedes (20) ein- und ausschaltbarer Antrieb (9) und eine mit dem Antrieb gekuppelte Zug-oder Druckstange (15) angeordnet sind, welche in einem einen Hebelarm bildenden Abstand (a) zur Querachse (18) zwischen Kopfstützengehäuse (6) einerseits und Stützglied (3) andererseits angreift.1. Dental treatment chair, on the backrest (1) by means of a support member (3) a headrest (2) which is displaceable in the longitudinal axis of the backrest is held, which can be adjusted by means of an adjusting device about a horizontal transverse axis (18) in various inclination positions, locked in these positions, and Can be unlocked again by means of a trigger element (20) which can be actuated by hand, characterized in that in the headrest housing (6) a drive (9) which can be switched on and off by means of the trigger element (20) and a pull or push rod (15) coupled to the drive. are arranged, which acts at a distance (a) forming a lever arm to the transverse axis (18) between the headrest housing (6) on the one hand and the support member (3) on the other. 2. Zahnärztlicher Behandlungsstuhl nach Anspruch 1, dadurch gekennzeichnet, daß das Stützglied (3) an seinem die Querachse (18) aufnehmenden Ende einen den Hebelarm bildenden Ansatz (16) aufweist, an dem die mit dem Antrieb (9) gekuppelte Zug-/Druckstange (15) angelenkt ist.2. Dental treatment chair according to claim 1, characterized in that the support member (3) at its end receiving the transverse axis (18) has a lever arm forming projection (16) on which the pull / push rod coupled to the drive (9) (15) is articulated. 3. Behandlungsstuhl nach Anspruch 1 oder 2, dadurch gekennzeichnet , daß im Kopfstützengehäuse (6) eine von einem Elektromotor (9) angetriebene Spindel (7) gelagert ist, auf der eine Spindelmutter (10) aufgesetzt ist, an der ein am Kopfstützengehäuse (6) angelenkter Hebel (12) angreift, an dem die Zug-/Druckstange (15) gelagert ist.3. Treatment chair according to claim 1 or 2, characterized in that in the headrest housing (6) is driven by an electric motor (9) driven spindle (7) on which a spindle nut (10) is placed, on which a headrest housing (6 ) articulated lever (12) on which the pull / push rod (15) is mounted. 4. Behandlungsstuhl nach Anspruch 3, dadurch gekennzeichnet , daß die Spindel (7) auf der einen Längsseite des Kopfstützengehäuses (6) in dessen Längsrichtung verlaufend gelagert ist und der an der Spindelmutter (10) angreifende Hebel (12) quer dazu als Kipphebel ausgebildet und auf der gegenüberliegenden anderen Längsseite gelagert ist (13), und der Zug- und Druckstange (15) benachbart dem Drehpunkt (13) des Kipphebels (12) angelenkt ist (14).4. Treatment chair according to claim 3, characterized in that the spindle (7) on one longitudinal side of the headrest housing (6) is mounted in the longitudinal direction thereof and the lever (12) acting on the spindle nut (10) is designed as a rocker arm transversely thereto and is mounted on the opposite other longitudinal side (13), and the pull and push rod (15) is articulated (14) adjacent to the pivot point (13) of the rocker arm (12). 5. Behandlungsstuhl nach Anspruch 1, dadurch gekennzeichnet , daß der Antriebsmotor (9) etwa in der Mitte des Kopfstützengehäuses (6) angeordnet ist und die Spindel (7) über einen Riemen (8) angetrieben wird.5. Treatment chair according to claim 1, characterized in that the drive motor (9) is arranged approximately in the middle of the headrest housing (6) and the spindle (7) is driven by a belt (8). 6. Behandlungsstuhl nach einem der Ansprüche 3 - 5, dadurch gekennzeichnet , daß der an der Spindelmutter (7) angreifende Hebel (12) dort nur in einer, der Neigungsbewegung der Kopfstütze nach rückwärts entsprechenden, Verstellrichtung gegen Anschlag aufliegt, in der anderen Verstellrichtung dagegen frei bewegbar ist.6. Treatment chair according to one of claims 3 - 5, characterized in that the lever (12) engaging on the spindle nut (7) rests there only in one, the tilting movement of the headrest backwards corresponding adjustment direction against the stop, in the other adjustment direction is freely movable. 7. Behandlungsstuhl nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet , daß die Spindelmutter (7) mittels einer Nut/Feder-Führung (11) entlang der Spindel (7) gegen Verdrehung am Kopfstützengehäuse (6) geführt ist.7. Treatment chair according to one of claims 3 to 6, characterized in that the spindle nut (7) is guided by means of a tongue and groove guide (11) along the spindle (7) against rotation on the headrest housing (6).
EP83102087A 1982-03-17 1983-03-03 Dental treatment chair Expired EP0088957B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8207541 1982-03-17
DE8207541U 1982-03-17

Publications (3)

Publication Number Publication Date
EP0088957A2 true EP0088957A2 (en) 1983-09-21
EP0088957A3 EP0088957A3 (en) 1984-04-25
EP0088957B1 EP0088957B1 (en) 1986-12-30

Family

ID=6738113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83102087A Expired EP0088957B1 (en) 1982-03-17 1983-03-03 Dental treatment chair

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Country Link
EP (1) EP0088957B1 (en)
JP (1) JPS58169448A (en)
DE (1) DE3368515D1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5346283A (en) * 1991-06-10 1994-09-13 Siemens Aktiengesellschaft Dental patient chair with an adjustable headrest
DE102006055211B3 (en) * 2006-11-21 2008-05-21 Sirona Dental Systems Gmbh Adjustable headrest for a dental workstation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0346755Y2 (en) * 1986-12-11 1991-10-03
DE10014063A1 (en) * 2000-03-22 2001-09-27 Kaltenbach & Voigt Medical or dental treatment chair or a headrest for such a treatment chair

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3471198A (en) * 1967-10-16 1969-10-07 Lear Siegler Inc Headrest assembly
DE2047720A1 (en) * 1969-10-13 1971-04-22 Sybron Corp , Rochester, N Y (VStA) Headrest
US3817576A (en) * 1972-10-02 1974-06-18 Pennwalt Corp Dental chair with adjustable headrest
DE2932344A1 (en) * 1979-08-09 1981-02-26 Ritter Ag Dentists chair head rest adjusting mechanism - has triangular linkage and guide members slid by servomotors in backrest
DE3048688A1 (en) * 1979-12-27 1981-09-10 Kabushiki Kaisha Morita Seisakusho, Kyoto CONTROL DEVICE FOR THE HEADREST OF A TREATMENT CHAIR

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3471198A (en) * 1967-10-16 1969-10-07 Lear Siegler Inc Headrest assembly
DE2047720A1 (en) * 1969-10-13 1971-04-22 Sybron Corp , Rochester, N Y (VStA) Headrest
US3817576A (en) * 1972-10-02 1974-06-18 Pennwalt Corp Dental chair with adjustable headrest
DE2932344A1 (en) * 1979-08-09 1981-02-26 Ritter Ag Dentists chair head rest adjusting mechanism - has triangular linkage and guide members slid by servomotors in backrest
DE3048688A1 (en) * 1979-12-27 1981-09-10 Kabushiki Kaisha Morita Seisakusho, Kyoto CONTROL DEVICE FOR THE HEADREST OF A TREATMENT CHAIR

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5346283A (en) * 1991-06-10 1994-09-13 Siemens Aktiengesellschaft Dental patient chair with an adjustable headrest
DE102006055211B3 (en) * 2006-11-21 2008-05-21 Sirona Dental Systems Gmbh Adjustable headrest for a dental workstation

Also Published As

Publication number Publication date
DE3368515D1 (en) 1987-02-05
JPS58169448A (en) 1983-10-05
EP0088957B1 (en) 1986-12-30
EP0088957A3 (en) 1984-04-25
JPH0310334B2 (en) 1991-02-13

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