US3806192A - Chair for dental patients - Google Patents

Chair for dental patients Download PDF

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Publication number
US3806192A
US3806192A US00264211A US26421172A US3806192A US 3806192 A US3806192 A US 3806192A US 00264211 A US00264211 A US 00264211A US 26421172 A US26421172 A US 26421172A US 3806192 A US3806192 A US 3806192A
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United States
Prior art keywords
chair
seat
accordance
lower portion
rods
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
US00264211A
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English (en)
Inventor
W Ohlrogge
W Hetz
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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
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Publication of US3806192A publication Critical patent/US3806192A/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/04—Hairdressers' or similar chairs, e.g. beauty salon chairs
    • 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 invention is particularly characterized in that the seat is mounted upon the lower portion so as to be movable in the longitudinal direction of the chair, while the back is guided over a rigid guide which is connected with the lower portion and the back.
  • Means are provided in the part of the seat free from the hinge between it and the lower portion which are operable when the back is swung to tip the seat about a horizontal axis toward the back.
  • This invention relates to a chair for dental patients having an inclinable back and an adjustable seat.
  • the invention is particularly concerned with a chair for dental. patients having a lower portion and an upper portion including a swingable back and a seat movable uponthelower portion in the longitudinal direction of the chair. when the back is swung and connected at its rear endby a hinge with the lower end of the back.
  • a. known examining and. treating chair has a back provided with a running surface and an outer support with rollers located between them which are arranged on a fixed link connected with the base.
  • the seat which is connected with the back by a hinge, is moved upon a slidingsurface when the back is inclined.
  • This chair construction has, amongothers, the drawbackthat the fixed link and the running surfaces for the rollers require a comparatively large space behind the back,.so that freedom of kneemovement for the dentist and his assistant is greatly limited, particularly in a sitting working position and when the back is inclined rearwardly toa great extent.
  • Anobject of the present invention is to improve existing constructions.
  • Another object is the provision of a. chair for dental patients which can be used in a large number of ways and which nevertheless has a simple structure.
  • a further object is the provision of a chair wellsuited for treating lying patients in modernways.
  • the rear side of the back. should be substantially free from guiding and. supporting parts for the back and the seat, so that1 it should be as flat. as possible and provide great freedom for the knees of the dentist.
  • advantages of known chair constructions should be fully retained wherein when the position of the; chair is changed, the distance of the dentist or his assistant from. the: mouth of the patient is substantially unchanged, so that no corrections are necessary when the treating position is changed.
  • the adjusting mechanism of the chair. parts should be operated as easily as possible.
  • Yet another objectof the present invention is to construct a. chair for dental patients in such manner that the patient can assume a relaxed and convenient position. thereon in all lying and sitting positions. This is.
  • This construction of the present :invention provides a substantial advantage over known chair constructions as far as the location of the patient is concerned. Due to. this construction the patient has a secure hold even in an extreme lying position (with the head practically horizontal), since his body will not lie in a completely stretched position, but his legs will be somewhat bent relatively to his body due to the slight tipping of the seat.
  • the construction of the present invention makes it possible chair. couple the movements of the back and the seat as a tipping and at the same time to carry, out alongitudinal movement of the lower part of the chari.
  • the structural depthof the back does not haveto. be increased for this purpose.
  • By coupling three movements of the chair with each other substantial. advantages are produced since only a single drive is required for actuating the chair.
  • the resulting advantages consist not only in smaller manufacturing costs, which are particularly high in program-actuated chairs, since here only asingle operating circuit is required, but they also provide servicing advantages.
  • the dentist can actually operate the three chair movements by actuating a single button, providingthe adjustment of the entire upper chair portion.
  • a further advantage consists in the simple structure of the chair, particularly the setting mechanism.
  • the construction of the present invention solves the problemof eliminating to a great extent relative movements between the back of the patient and the supportingsurface of the back when the back is swung, without it being necessary to shift the rotary axis. of the back greatly forwards and upwardly, as is often the case in known patients chairs.
  • Means for tipping the seat when the back is inclined can consist advantageously of a supporting arm arranged between the seat and the lower part of the chair.
  • the arm supports the seat when the back is inclined relatively to the lower part and tips the seat toward the back.
  • a further advantageous embodiment consists in providing a curved member upon the seat or the lower part of the chair in the seat part free from the hinge for the tipping of the seat, a roll member or the like being used as a support of the chair lower part or the seat engaging the curved member.
  • the best possible lying position is attained when the curved member is so shaped, or according to another suggestion, when the size of the supporting arm or its attachment are so selected, that the tipping of the seat starts only when the back is inclined by more than 25 to the vertical.
  • the hinge of the rigid guide belonging to the lower part of the chair as well as that of the supporting arm can be combined into a slide stone movable along a straight guide.
  • FIG. 1 is a simplified side view of a chair for dental patients constructed in accordance with the present invention.
  • FIG. 2 is a side view of a somewhat differently constructed chair.
  • FIG. 3 is an enlarged side view of a part of a mechanism shown in FIG. 2.
  • FIG. 4 is a side view of another chair construction.
  • FIG. 5 is a side view of yet another chair construction.
  • FIG. 1 shows a chair for dental patients having a base 1 and a lower chair portion 2 adjustable in height relatively to the base.
  • the lower chair part 2 carries a back 3 and a seat 4 which jointly form the upper part of the chair.
  • the rear end of the seat 4 is connected by a hinge 5 with the back 3.
  • the hinge 5 is supported in a straight guide 11 mounted upon the lower chair part 2 to provide longitudinal movement of the seat 4.
  • the straight guide 11 has a substantially horizontal guiding path.
  • the guide 11 is supposed to represent a slide guide. Obviously the slide guide can be replaced by a roller guide.
  • the back 3 is guided by rods 6 and 8, the rod 6 being pivoted at 7 to the lower chair part 2 while the rod 8 is connected by the pivot 9 with the back 3.
  • the rods 6 and 8 are rigidly interconnected.
  • the seat 4 is swingably connected in the part free from the hinge 5 with the lower chair portion 2 by a supporting arm 40. Pivots attached to the ends of the arm 40 are indicated as 41 and 42. It is apparent from the drawing that when the back 3 is inclined, the entire upper chair part 3, 4 is movable upon the straight guide 11.
  • the supporting arm 40 is of such length and the pivots 41 and 42 are so arranged that when the back 3 is inclined in the direction of the arrow, the seat 4 is easily raised toward the back. Obviously, when the back is raised the seat is lowered.
  • the easy raising of the front part of the seat (foot support) when the back is inclined provides a particularly good hold and seating without tension for a patient sitting upon the chair. As shown in the drawing, the tipping takes place about an axle 5 common to back 3 and seat 4.
  • pivot 9 along the back need not be that shown in the drawing. Obviously it must not coincide with the hinge 5.
  • the pivot 7 and pivot 50 of FIG. 3 are so arranged as far as their height is concerned that when the back is lowered to a great extent an imaginary straight line extruding between the pivots 9 and 7, or between pivots 9 and 50 will be always located above the hinge 5.
  • the end pivots of the hinge are constructed as slide stones which can easily move in the path of the straight guide 1 1.
  • the rigid rod connection 6, 8 serves at the same time as an arm support and is arranged on both sides of the chair.
  • One of these arm supports is preferably so constructed that its rods can be changed by simple manipulation from a rigid condition to a non-rigid condition so that the arm support can be moved to a position which will help the patient to get off the chair.
  • the rods can be made of two parts and provided with a lockable coupling member permitting the rods to be rigid in a coupled condition and swinging them into an open position when uncoupled.
  • the pivots 9 and 7 are constructed as cardan joints with both cardan axes extending in the direction of the connection 7-9.
  • This arrangement makes possible a single side swinging of the arm support into a get off position (about the diagonal 9-7 of the rectangle 9, 5, 7, 12 as the swinging axis), so that it is not necessary to provide a special device, such as a telescopic support or the like for this purpose, as is the case in prior art arm supports. From the drawing it is apparent that in a folded position the arm 9-12 of the arm support substantially covers the side 9-5 of the back and the arm 12-7 covers the side 5-7. Thus when the arm support is folded the patient can easily leave the chair.
  • a further advantage consists in that the arm support can be folded inwardly to some extent and thus provide a better hold, particularly for small children.
  • the construction of the present invention makes it possible to provide good compensation for forces exerted in different directions by the weight of the patient upon the chair. It is apparent from the drawing that forces acting upon the back have the tendency of moving the chair forward (toward the foot end of the chair), while the forces upon the inclined rising seat have the tendency of moving the chair rearwardly (toward the headend of the chair). The two forces are opposed and nearly balance each other.
  • the pivots 50 and 51 used to support the arm 8 and the arm 40 holding the seat 4 upon the chair lower part 20, are combined into a common slide stone 52.
  • the slide stone 52 is movable in a straight guide 53 having a, horizontal guide path and carried by the chair lower part 20.
  • the guide 53 is so arranged that the arm 40 raises the seat 4 only when the back 3 has been inclined by more than 25 relatively to the vertical. Thus the tipping movement of the seat is retarded relatively to the movement of the back.
  • the initial position of the seat is combined with an inclination of the back of about to the vertical. This was found to be a particularly good position when a pa.- tientis getting off.
  • the seat 4 is initially moved only in the longitudinal direction.
  • the slide stone 52 reaches its counter support in the guide 53.
  • the seat 4 begins to rise toward the back.
  • FIG. 4 shows other means for coupling the tippingof the seat 4 with the movement of the back 3.
  • the pivoted arm is replaced by a curved member 60 located upon the lower part of the seat 4 and supported by a roller guide 62 fixed upon the lower chair portion 61.
  • the angle of im clinationof thecurved member 60 canbe changedby an adjusting screw 63 or the like, so that the tipping (rising) of the seat depending upon the inclination of the back can be adjusted individually.
  • the curved member 60 can be also fixed upon the lower chair portion 61 while the roller guide 62 can be attached to the seat.
  • FIG. 5 shows anembodiment of the patients chair of the present invention wherein the seat is made of two parts, namely, it isdivided into a seat support 70 and a leg support 72 connected with the seat support by a rotary hinge 71.
  • the leg support 72 is provided with a curved member 73 which is also supported by a roller guide 74 connected with the lower chair portion 61.
  • the curved member 73 is so arranged or its inclination can be adjusted in such manner that the leg support 72 is raised by a predetermined amount for a predetermined position of theback.
  • the straight guide for the hinge Sshown in the drawingsdoes not have to be necessarily a horizontal guide path. It is possible within the scope of the present invention to make the guide path somewhat inclined to the horizontal, namely, in such manner that when the hinge 5 is moved longitudinally (when the back is inclined) the seat 4 is moved upon an inclined plane provided by the inclined guide path in the direction of a tipping seat movement.
  • the present invention solves the problem of adjusting the chair with small operational forces.
  • the upper chair part is well balanced in all positions. As already described, even when a patient is sitting on thechair, the balancing of the upper part of the chair is provided, since forces exerted upon the back. substantially balance the forces exerted upon the seat consisting of a seat support and leg support.
  • the resulting advantages consist in that the upper chair part can be also adjusted by hand. and if a drive isprovided, it must have only a comparatively small output.
  • a rotary drive can be provided for operating the chair which, for example, engages the hinge 5 or 9 and. causes the swinging of the back. It is also possible to provide a straight drive, such as a hydraulic or pneumatic. piston drive,.whichengages the seat as a suitable location of the straight guide.
  • seat is shiftable ina longitudinal guide.
  • supporting the seat in the longitudinal guide can be provided at any desired suitable place.
  • a chair in accordance with claim 1 wherein the second-mentioned means comprise a curved member and a roller guide engaging said curved member.
  • a chair in accordance withcla'im 1 wherein the second-mentioned means comprise a supporting arm piv- Q tally connected with said seat and said lower portion.
  • a chair in accordance with claim 3, comprising crosshead guides having a horizontal. guiding way and carried by said lower portion, said supporting arm.
  • a chair in accordance with claim 3, comprising a common bearing upon said lower portion for said rods and said supporting arm.
  • a chair in accordance with claim 6, comprising a sliding block movable upon said crosshead guides and constituting a bearing for said supporting arm and said rods.
  • rods constitute arm supports, cardan joints connecting said rods with said back and said lower portion.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
US00264211A 1971-08-16 1972-06-19 Chair for dental patients Expired - Lifetime US3806192A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2141022A DE2141022C3 (de) 1971-08-16 1971-08-16 Zahnärztlicher Patientenstuhl mit neigbarer Rückenlehne und verstellbarem Sitz

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/912,233 Reissue USRE30648E (en) 1971-08-16 1978-06-02 Chair for dental patients

Publications (1)

Publication Number Publication Date
US3806192A true US3806192A (en) 1974-04-23

Family

ID=5816882

Family Applications (2)

Application Number Title Priority Date Filing Date
US00264211A Expired - Lifetime US3806192A (en) 1971-08-16 1972-06-19 Chair for dental patients
US05/912,233 Expired - Lifetime USRE30648E (en) 1971-08-16 1978-06-02 Chair for dental patients

Family Applications After (1)

Application Number Title Priority Date Filing Date
US05/912,233 Expired - Lifetime USRE30648E (en) 1971-08-16 1978-06-02 Chair for dental patients

Country Status (7)

Country Link
US (2) US3806192A (de)
JP (1) JPS552979B2 (de)
BR (1) BR7205587D0 (de)
DE (1) DE2141022C3 (de)
FR (1) FR2150101A5 (de)
GB (1) GB1393453A (de)
IT (1) IT963949B (de)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4047758A (en) * 1976-02-23 1977-09-13 Kenneth Jack Whitehill Adjustable dental recliner
US4099276A (en) * 1976-07-26 1978-07-11 Watkins & Watson Limited Support appliances having articulated sections
US4217669A (en) * 1978-03-27 1980-08-19 Stylar Industries, Inc. Convertible seat
US4252371A (en) * 1979-05-03 1981-02-24 Lehnen James A Lounge chair
US4268086A (en) * 1977-07-16 1981-05-19 Aisin Seiki Kabushiki Kaisha Seat assembly for an automobile
US4968095A (en) * 1987-11-23 1990-11-06 Moyers, Inc. Seat back arm recliner
US5314237A (en) * 1992-02-12 1994-05-24 Kimball International Marketing, Inc. Reclining chair
US6739669B2 (en) * 2002-05-23 2004-05-25 Tzora Active Systems Ltd. Foldable armrest for a seat having a collapsible back
US6742840B2 (en) * 2001-05-25 2004-06-01 Weber Aircraft Lp Adjustable seats
US20080179934A1 (en) * 2007-01-29 2008-07-31 Ahearn David J Chair arm rest system
US20080303329A1 (en) * 2005-08-04 2008-12-11 Heka Dental Aps Chair or a Bed Having a Seat, a Backrest and an Armrest as Well as Use Thereof
US20110043023A1 (en) * 2004-10-12 2011-02-24 Lafreniere Sandi Lounge chair with adjustable arm rests
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
US10021984B2 (en) 2015-04-13 2018-07-17 Steelcase Inc. Seating arrangement
US10194750B2 (en) 2015-04-13 2019-02-05 Steelcase Inc. Seating arrangement
US10966527B2 (en) 2017-06-09 2021-04-06 Steelcase Inc. Seating arrangement and method of construction
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
US11779501B2 (en) * 2019-09-17 2023-10-10 Engle Dental Systems, LLC Traverse dental chair and a sensor assembly for monitoring positions thereof

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3209773A1 (de) * 1982-03-17 1983-09-22 Siemens AG, 1000 Berlin und 8000 München Zahnaerztlicher patientenstuhl
US5190349A (en) * 1990-03-29 1993-03-02 A-Dec, Inc. Dental chair
US5467002A (en) * 1993-11-05 1995-11-14 Reliance Medical Products, Inc. Adjustable chair having programmable control switches
DE19853271A1 (de) * 1998-11-18 2000-05-25 Maquet Ag Untersuchungsstuhl

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2629425A (en) * 1946-06-18 1953-02-24 Boeing Co Berthable chair
US3427072A (en) * 1966-08-15 1969-02-11 Dean Howard Hale Reclining dental chair
DE1940646A1 (de) * 1969-08-09 1971-02-11 Siemens Ag Zahnaerztlicher Patientenstuhl
US3578379A (en) * 1967-12-28 1971-05-11 Pennwalt Corp Adjustable chair

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* Cited by examiner, † Cited by third party
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US454912A (en) * 1891-06-30 Staedt
US2016133A (en) * 1932-01-11 1935-10-01 Heywood Wakefield Co Reclining chair
US2497395A (en) * 1946-03-04 1950-02-14 Sr Roy A Cramer Reclining chair
US2479175A (en) * 1946-08-10 1949-08-16 Reconstruction Finance Corp Reclining chair
US2677412A (en) * 1947-12-03 1954-05-04 Joseph R Thomas Reclining chair
US2633181A (en) * 1950-09-14 1953-03-31 Pearl B Beil Lounge chair
US2746523A (en) * 1951-07-09 1956-05-22 Cuesta Eduardo Martinez De La Rocking chairs with adjustable backs
US3138805A (en) * 1961-04-11 1964-06-30 Salvatore J Piazza Bed-wheelchair
US3381997A (en) * 1966-09-06 1968-05-07 Edward E. Fritz Adjustable chair
US3719391A (en) * 1970-04-17 1973-03-06 V Neri Chair for use in dentistry

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2629425A (en) * 1946-06-18 1953-02-24 Boeing Co Berthable chair
US3427072A (en) * 1966-08-15 1969-02-11 Dean Howard Hale Reclining dental chair
US3578379A (en) * 1967-12-28 1971-05-11 Pennwalt Corp Adjustable chair
DE1940646A1 (de) * 1969-08-09 1971-02-11 Siemens Ag Zahnaerztlicher Patientenstuhl

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4047758A (en) * 1976-02-23 1977-09-13 Kenneth Jack Whitehill Adjustable dental recliner
US4099276A (en) * 1976-07-26 1978-07-11 Watkins & Watson Limited Support appliances having articulated sections
US4268086A (en) * 1977-07-16 1981-05-19 Aisin Seiki Kabushiki Kaisha Seat assembly for an automobile
US4217669A (en) * 1978-03-27 1980-08-19 Stylar Industries, Inc. Convertible seat
US4252371A (en) * 1979-05-03 1981-02-24 Lehnen James A Lounge chair
US4968095A (en) * 1987-11-23 1990-11-06 Moyers, Inc. Seat back arm recliner
US5314237A (en) * 1992-02-12 1994-05-24 Kimball International Marketing, Inc. Reclining chair
US6742840B2 (en) * 2001-05-25 2004-06-01 Weber Aircraft Lp Adjustable seats
US6739669B2 (en) * 2002-05-23 2004-05-25 Tzora Active Systems Ltd. Foldable armrest for a seat having a collapsible back
US20110043023A1 (en) * 2004-10-12 2011-02-24 Lafreniere Sandi Lounge chair with adjustable arm rests
US20080303329A1 (en) * 2005-08-04 2008-12-11 Heka Dental Aps Chair or a Bed Having a Seat, a Backrest and an Armrest as Well as Use Thereof
US7618095B2 (en) * 2005-08-04 2009-11-17 Heka Dental A.P.S. Chair or a bed having a seat, a backrest and an armrest as well as use thereof
US20080179934A1 (en) * 2007-01-29 2008-07-31 Ahearn David J Chair arm rest system
US7422288B2 (en) 2007-01-29 2008-09-09 Ahearn David J Chair arm rest system
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
US10575648B2 (en) 2015-04-13 2020-03-03 Steelcase Inc. Seating arrangement
US10194750B2 (en) 2015-04-13 2019-02-05 Steelcase Inc. Seating arrangement
US10021984B2 (en) 2015-04-13 2018-07-17 Steelcase Inc. Seating arrangement
US11096497B2 (en) 2015-04-13 2021-08-24 Steelcase Inc. Seating arrangement
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
US11324325B2 (en) 2015-04-13 2022-05-10 Steelcase Inc. Seating arrangement
US11553797B2 (en) 2015-04-13 2023-01-17 Steelcase Inc. Seating arrangement
US11963621B2 (en) 2015-04-13 2024-04-23 Steelcase Inc. Seating arrangement
US10966527B2 (en) 2017-06-09 2021-04-06 Steelcase Inc. Seating arrangement and method of construction
US11825955B2 (en) 2017-06-09 2023-11-28 Steelcase Inc. Seating arrangement and method of construction
US11779501B2 (en) * 2019-09-17 2023-10-10 Engle Dental Systems, LLC Traverse dental chair and a sensor assembly for monitoring positions thereof

Also Published As

Publication number Publication date
DE2141022B2 (de) 1974-03-28
DE2141022C3 (de) 1978-04-20
JPS4829293A (de) 1973-04-18
BR7205587D0 (pt) 1973-11-01
JPS552979B2 (de) 1980-01-23
DE2141022A1 (de) 1973-02-22
USRE30648E (en) 1981-06-16
IT963949B (it) 1974-01-21
FR2150101A5 (de) 1973-03-30
GB1393453A (en) 1975-05-07

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