US3889998A - Adjustable dental chair - Google Patents

Adjustable dental chair Download PDF

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Publication number
US3889998A
US3889998A US407259A US40725973A US3889998A US 3889998 A US3889998 A US 3889998A US 407259 A US407259 A US 407259A US 40725973 A US40725973 A US 40725973A US 3889998 A US3889998 A US 3889998A
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US
United States
Prior art keywords
actuating
chair
upper edge
actuating members
switches
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US407259A
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English (en)
Inventor
Rolf-Jurgen Weiland
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 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
Priority claimed from DE19722251738 external-priority patent/DE2251738C3/de
Priority claimed from DE2339267A external-priority patent/DE2339267B2/de
Application filed by Siemens Corp filed Critical Siemens Corp
Application granted granted Critical
Publication of US3889998A publication Critical patent/US3889998A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A61G15/02—Chairs with means to adjust position of patient; Controls therefor

Definitions

  • the switches are so arranged that actu- 297/347, 348 188, 191 217-, 200/153 K, ating members operatively connected with the [326/13 R, 13 136/37 switches are located in a space defined substantially by the upper edge of the back and a limiting line lo- [56]
  • the present invention pertains to an adjustable chair for dental patients with a back and manually operated switches located upon the rear side of the back for releasing an operating procedure to adjust the chair.
  • Patients chairs are also known wherein the manual switches are located on both sides of the back, namely, upon its side surfaces.
  • the drawback of this arrangement is that a double switch arrangement is required in order to be able to operate the adjusting device equally well from one side of the chair as well as from the other side.
  • An object of the present invention is the provision of an adjustable chair for dental patients of the described type wherein the manual switches releasing operating procedures for chair adjustment can be uniformly well and easily operated by the doctor and his assistant and wherein the danger of erroneous switching through oversight actuation of switches is greatly reduced particularly when the back is greatly inclined.
  • the actuating member is constructed as a substantially flat shaped part which is shiftable in the direction of its flat extension. This provides on the one hand that wrong switching is avoided when there is an erroneous pressing against the actuating surface, and, on the other hand, that the switch can have a very narrow fitting depth, so that it can be advantageously used for very thin backs.
  • the shaped part can be preferably so constructed and arranged that it can be moved from a specific central position into two opposed switching positions.
  • the central position can be defined by a sheet spring fixed transversely to the shifting direction in the switch casing and serving as a return element in the switching positions.
  • a further advantageous construction consists in making the shaped part narrow and elongated.
  • the outer surface of the shaped part can be provided with a gripping recess.
  • the shaped part can be provided at an end of the actuating surface with an angular short attachment which is preferably shaped as a one part padshaped bent form piece, the curve being directed away from the servicing side of the chair.
  • This arrangement has the great advantage that the switch can be actuated in at least one switching direction also by the back of a hand or by the arm.
  • the actuating members can be clearly seen by the doctor and his assistant even in the complete lying position of the chair, i.e., when the back is inclined horizontally.
  • shifting switches are replaced by tipping switches which are so arranged that their axes extend transversely to the longitudinal symmetry axis of the back.
  • FIG. 1 is a perspective view of a dental chair of the present invention with hand switches upon the back of the chair.
  • FIG. 2 is a partial perspective view of the top part of a chair back having a switch arrangement with several hand switches.
  • FIG. 3 is a perspective view similar to that of FIG. 2 but showing a different construction of hand switches.
  • FIG. 4 is a rear view of the switch arrangement of FIG. 3.
  • FIG. 5 is a section along the lines IV IV of FIG. 4.
  • FIG. 6 is a partial section showing an actuating member of the switches of FIG. 3.
  • FIG. 7 is a diagram showing the connection of a switch to its motor.
  • FIG. 1 shows a dental chair for patients having an upper part consisting of a seat I and a back 2.
  • the upper part is mounted upon a support 3 which is connected by a parallelogram arm 4 with a base 5.
  • the back 2 can be inclined relatively to the seat I by a rotary joint 6.
  • the seat is moved by an electromotor axle drive 7 which is shown diagrammatically in the drawing and which is fixed on one side to a frame part 8 of the back and on the other side to a frame part 9 of the seat.
  • a further axle drive 10 is provided for height adjustment of the upper part 1, 2 of the chair, the drive being supported on the one side at the base 5 and on the other side on the seat support 3.
  • the two electric motors of the axle drives are switched on and off by hand switches 11, 12.
  • the hand switches are provided in the upper part of the back and are operated from the rear side of the back.
  • Parts actuating the switches l1, 12 are located directly under the upper edge 13 and substantially in the middle of the back. As shown in FIG. 1 these parts are located around the longitudinal axis 25 of the symmetry of the chair; they can be conveniently reached and actuated by the doctor who works at the right hand side of the chair as well as by his assistant who helps him from the opposite side.
  • the double switch arrangement used in prior art patients chairs is eliminated.
  • Key surfaces of members actuating the switches 11, I2 are preferably located in a section defined by the upper edge 13 of the back and a line 14 located below the back at a distance substantially equal to the width ofa hand (about ID to 15 cm.
  • An arrangement in this section is particularly advantageous since. as shown in the drawing, the operating person can place his fingers upon the upper edge of the back to provide support and direction.
  • the actuating members can be easily and quickly engaged even when the operator does not see them directly. This can be the case, for example, when the back is greatly inclined.
  • the range for the advantageous arrangement of the switches is shown by broken lines in FIG. 1 and indicated as a.
  • FIG. 2 A different embodiment of a switch connection is shown in an enlarged view on FIG. 2. It shows switches 15, 16 and 17 combined in a frame 18 into a switch area which is located directly under the upper edge 13 of the back 2.
  • the key surfaces of the actuating members 19 to 21 of the switches 15 to 17 extend in the lon gitudinal direction, namely, parallel to the longitudinal symmetry axis 25 of the back. At the top they extend around the upper edge 13 of the back.
  • This tipping arrangement makes it possible to easily recognize the switches in all positions of the chair, particularly in lying positions in which the back extends substantially horizontally.
  • the actuating members can be tipped on both sides about an axis 22 extending transversely to the longitudinal axis of the back and they operate upon microswitches.
  • microswitches 23 and 24 pertaining to the switch 16 have been illustrated. They are used to switch on and off the corresponding drives 7 and for moving the back and the seat in one or the other direction.
  • the switch can be used for other purposes.
  • the drawing shows that the actuating members 15 and 17 along with the frame 16 are embedded in the back. Their key surfaces extend substantially along the rear surface of the back and lie at least partly in that rear surface.
  • the advantage of the construction of the present invention is that the switches can be easily engaged even in extreme inclined positions of the back.
  • the surfaces of the switches which are to be engaged can be easily recognized in these inclined positions so that a mix up among the switches by a user is substantially eliminated even when the back is strongly inclined.
  • FIG. 3 Another embodiment of the hand switches is shown in FIG. 3 illustrating the upper part of the back 4.
  • Actuating members 31, 32, 33 are arranged in the switch area 30. These actuating members are shaped substantially as flat form pieces shiftable in the direction of their flat extension. They can be moved in both directions from a central position, as illustrated by arrows. To provide better engaging and handling the form pieces are provided substantially upon their half lengths with gripping recesses 34.
  • the drawing shows that the form pieces 31 to 33 are narrow and elongated. They are so constructed that their actuating surfaces extend within or parallel to their shifting plane. At their upper ends the form pieces are bent curve-like to form short connecting pieces 35 to 37.
  • the three actuating members 31 to 33 can be used to switch on the adjust ing devices for a movement of the seat in height (drive 10 of FIG. 1), for a tipping of the seat relatively to the seat carrier 3 and for the inclination of the back (drive 7 of FIG. 1).
  • the switching elements provided within the switch area 30 are coupled with the corresponding actuating circuits for the adjusting devices in such man ner that when the form pieces 31 to 33 are shifted in the direction of the base 5 of the chair, there is always a downward movement of the chair part being actuated.
  • the switch area is located in a depression of the back 2, so that actually there are no parts projecting beyond the outer surface of the back.
  • Pressure keys 38 to 40 operate upon the switch members used to switch on an actuating device by means of which the chair can be moved automatically into a preselected position. The pressure keys can provide three different chair positions.
  • FIG. 4 shows the switch area 30 from the back.
  • the form pieces 32 and 33 with the corresponding casing parts and switch elements are similarly constructed.
  • the switch area 30 includes a casing 41 in which frame members 42 are located.
  • the actuating member 31 shaped as a form piece is mounted between these frame members and is movable in the longitudinal direction of the casing.
  • the form piece 31 has a cross piece 43. When the part 31 moves out of its central position the cross piece actuates either the switch 44 or the switch 45.
  • the two switches 44 and 45 are fixed upon a supporting plate 46 shown in cross section in FIG. 5.
  • the plate 46 serves at the same time as the conducting plate for electronic structural members 47 of the above-mentioned actuating device.
  • the form piece 31 is provided with projections 48 between which is located a sheet spring 49 fixed to the frame parts 42 of the casing 41.
  • the spring 49 serve as return element for the form piece 31.
  • Projections 50 are located on both sides of the frame 42 and serve as a stop for the form piece 31 when the switch is located in the lower switching position.
  • a flange 51 lies upon the projection 50.
  • the pressure key 38 actuates a switch member 52 which serves to release the above-mentioned actuating device.
  • FIG. 6 shows the movable member 31 as a single part in longitudinal section.
  • the present invention is not limited to the mechanical structure of the patients chair shown in the drawings nor in the shown type and arrangement of the moving devices.
  • the hand switches can be also used to switch on and off valves of a hydraulic or pneumatic moving device.
  • One of the switches shown in the drawings can also release a switching operation by means of which the back and the seat are moved automatically into a position permitting the patient to step off.
  • An adjustable dental patients chair comprising a seat and a back, means for adjusting said seat and said back, manually operated switching means operatively connected with said adjusting means for actuating them, said switching means comprising switch elements and actuating members connected with said switch elements for actuating them, said actuating members having substantially flat key surfaces on their actuating sides and being located in the middle part of the rear side of the upper portion of said back, which part is limited by the upper edge of said back and a limiting line located substantially by the length of 10 to l 5 cm width below said upper edge.
  • An adjustable dental patients chair comprising a seat and a back, means for adjusting said seat and said back, manually operated switching means operatively connected with said adjusting means for actuating them, said switching means comprising switch elements and actuating members connected with said switch elements for actuating them, said actuating members being narrow and elongatedly shaped, having longitudinal axes extending parallel to the longitudinal symmetry axis of said back and having substantially flat key surfaces on their actuating sides, said actuating members being located in the middle part of the rear side of the upper portion of said back, which part is limited by the upper edge of said back and a limiting line located substantially by the length of to cm width below said upper edge, and wherein one of the narrow sides of the actuating members is adjacent to the upper edge of said back.

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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)
  • Accommodation For Nursing Or Treatment Tables (AREA)
US407259A 1972-10-21 1973-10-17 Adjustable dental chair Expired - Lifetime US3889998A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19722251738 DE2251738C3 (de) 1972-10-21 1972-10-21 Handschalter zum Schalten eines Verstellantriebes eines zahnärztlichen Patientenstuhles
DE2339267A DE2339267B2 (de) 1973-08-02 1973-08-02 Verstellbarer zahnärztlicher Patientenstuhl

Publications (1)

Publication Number Publication Date
US3889998A true US3889998A (en) 1975-06-17

Family

ID=25763986

Family Applications (1)

Application Number Title Priority Date Filing Date
US407259A Expired - Lifetime US3889998A (en) 1972-10-21 1973-10-17 Adjustable dental chair

Country Status (5)

Country Link
US (1) US3889998A (enrdf_load_stackoverflow)
JP (1) JPS4995489A (enrdf_load_stackoverflow)
FR (1) FR2208641B1 (enrdf_load_stackoverflow)
GB (1) GB1452952A (enrdf_load_stackoverflow)
IT (1) IT995996B (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114946A (en) * 1976-05-28 1978-09-19 Kaltenbach & Voigt Gmbh & Co. Medical treatment chair
US4691964A (en) * 1986-06-30 1987-09-08 Morgan John A Powered reclining chair
US5214360A (en) * 1992-03-13 1993-05-25 Den-Tal-Ez, Inc. Programmable adjustable chair for medical and dental applications
US5671972A (en) * 1995-06-30 1997-09-30 Global Upholstery Company Seat back adjustment mechanism for a chair
US5868687A (en) * 1997-06-05 1999-02-09 Global Upholstery Company Chair equipped with massage apparatus
US5899530A (en) * 1995-08-23 1999-05-04 Global Upholstery Company Control mechanism for a chair
US6056363A (en) * 1997-12-29 2000-05-02 Maddox; Lee W. Reclining computer chair apparatus
US20070102979A1 (en) * 2005-10-25 2007-05-10 GLOBAL TOTAL OFFICE an Ontario limited partnership having GLOBAL UPHOLSTERY CO. Adjustment mechanism for a chair and method for replacing a telescoping cylinder in a reconfigurable chair
US20110095587A1 (en) * 2008-11-27 2011-04-28 Jeff Baker Articulated chair having universal reclining armrest system
US20170065083A1 (en) * 2008-11-27 2017-03-09 Medical Technology Industries, Inc. Articulated chair having universal reclining armrest system
US11369539B2 (en) * 2019-05-13 2022-06-28 David J. Ahearn Dental chair
US11730655B2 (en) 2019-05-13 2023-08-22 David J. Ahearn Dental chair

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1578905A (en) * 1976-05-28 1980-11-12 Kaltenbach & Voigt Medical treatment chair
GB8404507D0 (en) * 1984-02-21 1984-03-28 Spratling R J Support unit
FR2585562B1 (fr) * 1985-08-01 1989-09-01 Garant Benedicte Bouton-poussoir de commande de changement de position de tables de manipulation, medicale ou para-medicale
JP2010218831A (ja) * 2009-03-16 2010-09-30 Osamu Komatsu テレビ・オーディオ等線の接続用の線端子及び、装置分入機

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2608239A (en) * 1949-09-09 1952-08-26 Gorden Fred Chair
US3172699A (en) * 1963-07-01 1965-03-09 Den Tal Ez Chair Mfg Co Dental chair
US3209088A (en) * 1963-06-17 1965-09-28 Gen Motors Corp Sliding contact window switch with resilient spring means for biasing contacts and centering actuator means
US3247352A (en) * 1962-02-12 1966-04-19 Reiner Ind Inc Modular electrical components having means for side-by-side physical and electrical inter-connection
US3345488A (en) * 1966-11-04 1967-10-03 Kenron Aluminum And Glass Corp Center bias momentary switch
US3578379A (en) * 1967-12-28 1971-05-11 Pennwalt Corp Adjustable chair

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2608239A (en) * 1949-09-09 1952-08-26 Gorden Fred Chair
US3247352A (en) * 1962-02-12 1966-04-19 Reiner Ind Inc Modular electrical components having means for side-by-side physical and electrical inter-connection
US3209088A (en) * 1963-06-17 1965-09-28 Gen Motors Corp Sliding contact window switch with resilient spring means for biasing contacts and centering actuator means
US3172699A (en) * 1963-07-01 1965-03-09 Den Tal Ez Chair Mfg Co Dental chair
US3345488A (en) * 1966-11-04 1967-10-03 Kenron Aluminum And Glass Corp Center bias momentary switch
US3578379A (en) * 1967-12-28 1971-05-11 Pennwalt Corp Adjustable chair

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114946A (en) * 1976-05-28 1978-09-19 Kaltenbach & Voigt Gmbh & Co. Medical treatment chair
US4691964A (en) * 1986-06-30 1987-09-08 Morgan John A Powered reclining chair
US5214360A (en) * 1992-03-13 1993-05-25 Den-Tal-Ez, Inc. Programmable adjustable chair for medical and dental applications
US5671972A (en) * 1995-06-30 1997-09-30 Global Upholstery Company Seat back adjustment mechanism for a chair
US5899530A (en) * 1995-08-23 1999-05-04 Global Upholstery Company Control mechanism for a chair
US6019429A (en) * 1995-08-23 2000-02-01 Global Upholstery Company Control mechanism for a chair
US5868687A (en) * 1997-06-05 1999-02-09 Global Upholstery Company Chair equipped with massage apparatus
US6056363A (en) * 1997-12-29 2000-05-02 Maddox; Lee W. Reclining computer chair apparatus
US20070102979A1 (en) * 2005-10-25 2007-05-10 GLOBAL TOTAL OFFICE an Ontario limited partnership having GLOBAL UPHOLSTERY CO. Adjustment mechanism for a chair and method for replacing a telescoping cylinder in a reconfigurable chair
US20080010802A1 (en) * 2005-10-25 2008-01-17 Global Total Office an Ontario Limited Partership having Global Upholstery Co. Inc. as its General Method for replacing a telescoping cylinder in a reconfigurable chair
US7721399B2 (en) 2005-10-25 2010-05-25 Global Total Office An Ontario Limited Partnership Having Global Upholstery Co.Inc. As Its General Partner Method for replacing a telescoping cylinder in a reconfigurable chair
US20110095587A1 (en) * 2008-11-27 2011-04-28 Jeff Baker Articulated chair having universal reclining armrest system
US8480172B2 (en) * 2008-11-27 2013-07-09 Jeff Baker Articulated chair having universal reclining armrest system
US9125495B2 (en) 2008-11-27 2015-09-08 Medical Technologies Industries, Inc. Articulated chair having universal reclining armrest system
US20170065083A1 (en) * 2008-11-27 2017-03-09 Medical Technology Industries, Inc. Articulated chair having universal reclining armrest system
US9782319B2 (en) * 2008-11-27 2017-10-10 Medical Technology Industries, Inc. Articulated chair having universal reclining armrest system
US11369539B2 (en) * 2019-05-13 2022-06-28 David J. Ahearn Dental chair
US11730655B2 (en) 2019-05-13 2023-08-22 David J. Ahearn Dental chair

Also Published As

Publication number Publication date
FR2208641A1 (enrdf_load_stackoverflow) 1974-06-28
IT995996B (it) 1975-11-20
GB1452952A (en) 1976-10-20
FR2208641B1 (enrdf_load_stackoverflow) 1980-05-30
JPS4995489A (enrdf_load_stackoverflow) 1974-09-10

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