USRE29811E - Dental chair and adjustable head support mechanism therefor - Google Patents

Dental chair and adjustable head support mechanism therefor Download PDF

Info

Publication number
USRE29811E
USRE29811E US05/757,328 US75732877A USRE29811E US RE29811 E USRE29811 E US RE29811E US 75732877 A US75732877 A US 75732877A US RE29811 E USRE29811 E US RE29811E
Authority
US
United States
Prior art keywords
annular
pin
linking member
support
extending
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
US05/757,328
Inventor
Floyd E. Norris
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 filed Critical
Application granted granted Critical
Publication of USRE29811E publication Critical patent/USRE29811E/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G15/00Operating chairs; Dental chairs; Accessories specially adapted therefor, e.g. work stands
    • A61G15/10Parts, details or accessories
    • A61G15/12Rests specially adapted therefor, e.g. for the head or feet
    • A61G15/125Head-rests
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Support for the head or the back
    • A47C7/38Support for the head or the back for the head

Definitions

  • This invention relates to a dental chair and an improved adjustment mechanism for the headrest of the chair.
  • This invention relates to a dental chair incorporating an adjustable headrest which is vertically adjustable, adjustable about a central pivot point and adjustable both forward and rearward.
  • the adjustable headrest comprises a support connecting to the back support of the chair at one end and to the adjustment mechanism at the opposite end.
  • a padded headrest includes means connecting it with the adjustment mechanism.
  • the adjustment mechanism includes: (1) an elongated linking member having upper and lower, variable size jaw openings therein receiving the connecting means of the support and the headrest; (2) a pin extending through the linking member holding the connecting means in place; and (3) means secured to the pin at one end contacting a camming surface on the linking member for contracting the jaw openings about the connecting means, preventing their movement.
  • the invention is also directed to a dental chair including integral, deflectable "wing" portions extending between the arm support and the top of the back support which (1) are flexible, (2) allow the dentist or technician to work closer to the patient, if desired, and (3) do not need adjustment.
  • the objects of this invention are: (1) to provide an improved adjustment mechanism for the headrest of a chair which is relatively inexpensive to manufacture, easy to operate and flush mounted to prevent interference with the dentist or technician and for design purposes; (2) to provide a dental chair incorporating an improved, flush mounted adjustment mechanism for a headrest; (3) to provide a dental chair incorporating flexible, deflectable wing portions which do not need adjustment and which allow the operator closer access to the patient sitting in the chair; and (4) to provide a dental chair having a back support hinged to the lower body support forward of the terminating edge of the lower body support, the back support having a curved, barrel-like appearance.
  • FIG. 1 is a perspective view of the dental chair of the invention having a cut-away portion illustrating one of the flexible wings of the chair;
  • FIG. 2 is a rear elevational view of the headrest including the adjustment mechanism
  • FIG. 3 is a vertical cross-sectional view along section line 3--3 of FIG. 2 illustrating the adjustment mechanism
  • FIG. 4 is a horizontal cross-sectional view along section line 4--4 of FIG. 2;
  • FIG. 5 is a partial cross-sectional view of the flexible wing portion of the chair.
  • FIG. 1 illustrates a perspective view of the dental chair of this invention having a lower floor support 10 a padded lower body support 11 secured to the floor support 10 and a padded, integral back support 12 hinged at 21a to the lower body support forward of the rear terminating edge of the lower body support 11.
  • the frames of the lower body support 11 and back support 12 are fabricated from steel plating one-eighth inch to five-sixteenths inch thickness over which is placed padding as an outer decorative upholstery covering, such as leather, naugahyde or vinyl.
  • the back support has arm supports 14 attached at each side. Each of the arm supports includes a rigid steel frame, padding and covering similar to that of the lower body support and back support.
  • each of the arm supports Directly behind each of the arm supports is an arcuate member 15 secured to the frame of the back support, as illustrated by FIG. 1.
  • a stiff, semi-rigid material such as a thick plastic sheet 17 is stretched over the arcuate members and between the arm supports and the top of the frame of the back support prior to covering of the entire chair with the outer decorative covering, as illustrated by FIG. 5.
  • the end result is a flexible, deflectable wing portion 16 beside each arm which does not need adjustment and allows the operator or technician to get closer to the patient sitting in the chair, if necessary.
  • the wing portions can be deflected inwardly.
  • the wing portions On release of the deflector pressure, the wing portions will return to their original position due to the stiff material extending from the top of the back support over the arcuate portion 15 directly behind each of the arm supports 14.
  • the rear of the back support includes a slot 18 for insertion of the adjustable headrest assembly to be discussed.
  • the adjustable headrest assembly is illustrated by FIGS. 2 through 4 and essentially comprises a headrest support frame 39 covered with a padded front portion 40 and a padded rear portion 41 connected by an adjustment mechanism to an elongated support plate 19.
  • the headrest assembly is adjusted vertically relative to the back support by sliding in slot 18.
  • the assembly is held in a desired adjustment position by a friction clamp (not shown).
  • the supporting frame 39 of the headrest support has a center cut-out portion, as illustrated by FIG. 2, allowing the adjustment mechanism to be essentially flush mounted within the headrest assembly.
  • the adjustment mechanism comprises essentially an elongated, rectangular linking member 21 having bore openings 22 and 23 drilled therethrough at the upper and lower ends, respectively. Slots 24 and 25, cut in the link member 21, as illustrated by FIG. 3, communicate with the bore openings 22 and 23. The slot allows the internal diameter of the bore openings 22 and 23 to be reduced by compression of the linking member 21.
  • a channel 26 is bored at transverse angles through the length of the linking member 21 to receive pin 30. The channel intersects the bore openings 22 and 23 and projects a small distance into the bore openings, as illustrated by FIG. 4.
  • pins 27 and 28 having an outer diameter slightly less than the internal diameter of the openings 22 and 23, so that they are free to rotate in the absence of compressive force on the elongated linking member 21, tending to reduce the internal diameter of the bore openings 22 and 23.
  • Pin 27 consists essentially of two separate arcuate segments held in spaced relation by a rod 36 having a width less than the diameter of the pin 27.
  • the rod 36 is secured to the segments by a pivot pin 37 extending through the rod, as illustrated by FIGS. 3 and 4.
  • the pivot pin allows the rod to pivot thereabout between the positions shown in phantom in FIG. 4.
  • the rod 36 is connected by collars 38 to the headrest support frame 39. The headrest can thus be pivoted about the pivot pin 37 to a desired position and locked in place, as will be described.
  • the lower pin 28 extends beyond the plane of the member 21 on each side and includes a slot extending part way therethrough which receives the forks 42 of support plate 19, as illustrated by FIG. 2.
  • the pin 28 is secured in place to the plate 19 by bolts 43.
  • Each of the pins 27 and 28 has a central channel 29 cut therein, as illustrated by FIG. 4, of a depth sufficient to allow pin 30 to be inserted through the channel 26.
  • the purpose of the channels 29, in cooperation with pin 30, is to secure the pins 27 and 28 in place in the linking member.
  • the nut bears against a shoulder cut in the lower end of the linking member 21.
  • the upper end of the pin 30 is pivotally connected to a cam member 34 bearing against a cam surface 33 cut in the upper end of linking member 21.
  • the cam member 34 includes an integral handle 35 movable between the positions illustrated by FIG. 3. In the position shown in solid lines in FIG. 3, the pin in cooperation with the cam surface 34 exerts a compressive force on the respective ends of the linking member 21 compressing and closing the slots 24 and 25.
  • the headrest portion of the adjustable headrest assembly can easily be adjusted relative to support plate 19 by moving the handle 35 to the position shown in phantom in FIG. 3 and rotating the headrest about either of the upper or lower pins 27 and 28 and pivoting the headrest about pivot pin 37 as desired. Once the desired position of the headrest is obtained, the operator presses the handle 35 down to the position shown in solid lines in FIG. 3 to lock all the components together and prevent further rotation or movement.
  • the headrest can be adjusted to any desired position very easily and quickly.
  • the adjustment mechanism is flush mounted within the headrest assembly, is simple to operate and is relatively inexpensive to fabricate. The dentist or technician can adjust the patient's head to any desired angle for mouth work or denture work very easily and without complication.

Abstract

A dental chair is disclosed which has an adjustable headrest incorporating a flush mounted adjustment mechanism allowing (1) adjustment about a central pivot, (2) vertical adjustment or (3) forward and rear adjustment. The dental chair also incorporates deflectable "wing" portions adjacent each of the arm supports which do not need adjustment and which allow the dentist more ready access to the patient.

Description

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a dental chair and an improved adjustment mechanism for the headrest of the chair.
2. Prior Art Relating to the Disclosure
Many of the chairs used by dentists and other professionals have adjustable headrest assemblies which are expensive to fabricate, cumbersome, inadequately adjustable and annoying to operate. It is also conventional for dental chairs to incorporate arm slings extending from the top of the back support of the chair to the arm supports, which keep the patient's arms and hands close to the body, out of the way of the technician or professional. The slings are always slipping loose and needing adjustment.
SUMMARY OF THE INVENTION
This invention relates to a dental chair incorporating an adjustable headrest which is vertically adjustable, adjustable about a central pivot point and adjustable both forward and rearward. The adjustable headrest comprises a support connecting to the back support of the chair at one end and to the adjustment mechanism at the opposite end. A padded headrest includes means connecting it with the adjustment mechanism. The adjustment mechanism includes: (1) an elongated linking member having upper and lower, variable size jaw openings therein receiving the connecting means of the support and the headrest; (2) a pin extending through the linking member holding the connecting means in place; and (3) means secured to the pin at one end contacting a camming surface on the linking member for contracting the jaw openings about the connecting means, preventing their movement.
The invention is also directed to a dental chair including integral, deflectable "wing" portions extending between the arm support and the top of the back support which (1) are flexible, (2) allow the dentist or technician to work closer to the patient, if desired, and (3) do not need adjustment.
The objects of this invention are: (1) to provide an improved adjustment mechanism for the headrest of a chair which is relatively inexpensive to manufacture, easy to operate and flush mounted to prevent interference with the dentist or technician and for design purposes; (2) to provide a dental chair incorporating an improved, flush mounted adjustment mechanism for a headrest; (3) to provide a dental chair incorporating flexible, deflectable wing portions which do not need adjustment and which allow the operator closer access to the patient sitting in the chair; and (4) to provide a dental chair having a back support hinged to the lower body support forward of the terminating edge of the lower body support, the back support having a curved, barrel-like appearance.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the dental chair of the invention having a cut-away portion illustrating one of the flexible wings of the chair;
FIG. 2 is a rear elevational view of the headrest including the adjustment mechanism;
FIG. 3 is a vertical cross-sectional view along section line 3--3 of FIG. 2 illustrating the adjustment mechanism;
FIG. 4 is a horizontal cross-sectional view along section line 4--4 of FIG. 2; and
FIG. 5 is a partial cross-sectional view of the flexible wing portion of the chair.
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 illustrates a perspective view of the dental chair of this invention having a lower floor support 10 a padded lower body support 11 secured to the floor support 10 and a padded, integral back support 12 hinged at 21a to the lower body support forward of the rear terminating edge of the lower body support 11. The frames of the lower body support 11 and back support 12 are fabricated from steel plating one-eighth inch to five-sixteenths inch thickness over which is placed padding as an outer decorative upholstery covering, such as leather, naugahyde or vinyl. The back support has arm supports 14 attached at each side. Each of the arm supports includes a rigid steel frame, padding and covering similar to that of the lower body support and back support. Directly behind each of the arm supports is an arcuate member 15 secured to the frame of the back support, as illustrated by FIG. 1. A stiff, semi-rigid material, such as a thick plastic sheet 17, is stretched over the arcuate members and between the arm supports and the top of the frame of the back support prior to covering of the entire chair with the outer decorative covering, as illustrated by FIG. 5. The end result is a flexible, deflectable wing portion 16 beside each arm which does not need adjustment and allows the operator or technician to get closer to the patient sitting in the chair, if necessary. The wing portions can be deflected inwardly. On release of the deflector pressure, the wing portions will return to their original position due to the stiff material extending from the top of the back support over the arcuate portion 15 directly behind each of the arm supports 14. The rear of the back support includes a slot 18 for insertion of the adjustable headrest assembly to be discussed.
The adjustable headrest assembly is illustrated by FIGS. 2 through 4 and essentially comprises a headrest support frame 39 covered with a padded front portion 40 and a padded rear portion 41 connected by an adjustment mechanism to an elongated support plate 19. The headrest assembly is adjusted vertically relative to the back support by sliding in slot 18. The assembly is held in a desired adjustment position by a friction clamp (not shown). The supporting frame 39 of the headrest support has a center cut-out portion, as illustrated by FIG. 2, allowing the adjustment mechanism to be essentially flush mounted within the headrest assembly.
The adjustment mechanism comprises essentially an elongated, rectangular linking member 21 having bore openings 22 and 23 drilled therethrough at the upper and lower ends, respectively. Slots 24 and 25, cut in the link member 21, as illustrated by FIG. 3, communicate with the bore openings 22 and 23. The slot allows the internal diameter of the bore openings 22 and 23 to be reduced by compression of the linking member 21. A channel 26 is bored at transverse angles through the length of the linking member 21 to receive pin 30. The channel intersects the bore openings 22 and 23 and projects a small distance into the bore openings, as illustrated by FIG. 4. The bore openings 22 and 23 are fitted with pins 27 and 28, having an outer diameter slightly less than the internal diameter of the openings 22 and 23, so that they are free to rotate in the absence of compressive force on the elongated linking member 21, tending to reduce the internal diameter of the bore openings 22 and 23. Pin 27 consists essentially of two separate arcuate segments held in spaced relation by a rod 36 having a width less than the diameter of the pin 27. The rod 36 is secured to the segments by a pivot pin 37 extending through the rod, as illustrated by FIGS. 3 and 4. The pivot pin allows the rod to pivot thereabout between the positions shown in phantom in FIG. 4. The rod 36 is connected by collars 38 to the headrest support frame 39. The headrest can thus be pivoted about the pivot pin 37 to a desired position and locked in place, as will be described.
The lower pin 28 extends beyond the plane of the member 21 on each side and includes a slot extending part way therethrough which receives the forks 42 of support plate 19, as illustrated by FIG. 2. The pin 28 is secured in place to the plate 19 by bolts 43.
Each of the pins 27 and 28 has a central channel 29 cut therein, as illustrated by FIG. 4, of a depth sufficient to allow pin 30 to be inserted through the channel 26. The purpose of the channels 29, in cooperation with pin 30, is to secure the pins 27 and 28 in place in the linking member.
The pin 30, extending through channel 26 and securing the pins 27 and 28 in place, has a threaded portion 31 on the lower end over which is fitted a nut 32. The nut bears against a shoulder cut in the lower end of the linking member 21. The upper end of the pin 30 is pivotally connected to a cam member 34 bearing against a cam surface 33 cut in the upper end of linking member 21. The cam member 34 includes an integral handle 35 movable between the positions illustrated by FIG. 3. In the position shown in solid lines in FIG. 3, the pin in cooperation with the cam surface 34 exerts a compressive force on the respective ends of the linking member 21 compressing and closing the slots 24 and 25. As a result the internal diameter of openings 22 and 23 is reduced so that each frictionally engages the outer surfaces of pins 27 and 28 and prevents their rotation. When the handle 35 is moved to the position shown in phantom in FIG. 3, the compressive force on the linking member 21 is released, allowing the pins 27 and 28 to rotate freely within the bore openings 22 and 23.
The headrest portion of the adjustable headrest assembly can easily be adjusted relative to support plate 19 by moving the handle 35 to the position shown in phantom in FIG. 3 and rotating the headrest about either of the upper or lower pins 27 and 28 and pivoting the headrest about pivot pin 37 as desired. Once the desired position of the headrest is obtained, the operator presses the handle 35 down to the position shown in solid lines in FIG. 3 to lock all the components together and prevent further rotation or movement. The headrest can be adjusted to any desired position very easily and quickly. The adjustment mechanism is flush mounted within the headrest assembly, is simple to operate and is relatively inexpensive to fabricate. The dentist or technician can adjust the patient's head to any desired angle for mouth work or denture work very easily and without complication.

Claims (4)

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. An adjustment mechanism linking a head support and means for attachment to the back support of a chair comprising:
an elongated linking member having two parallel annular openings extending therethrough near each end,
slots in the linking member extending from the outer surface thereof into communication with each of the annular openings, each of the slots allowing the internal diameter of each of the annular openings to be reduced by compression of the linking member adjacent the slots;
an open-ended channel extending through the linking member essentially transverse to the axis of each of the annular openings and communicating with the slots and a segment of each of the annular openings;
annular pins received in each of the annular openings, each pin having an external diameter slightly less than the internal diameter of the respective annular opening in the uncompressed state, allowing free rotation thereof, each pin having a channel extending around the outer circumference thereof;
means connecting one of the annular pins to the head support and the other annular pin to the means for attachment to the back support;
a pin extending through the open-ended channel of the linking member communicating with the respective channels in the annular pins to retain the annular pins in place in the linking member;
retaining means at one end of the pin to retain the pin in place in the open-ended channel; and
cam means connected to the opposite end of the pin for exerting tension on the pin relative to the linking member to compress the linking member, reducing the diameter of the annular openings and frictionally engaging the annular pins to lock them against rotation.
2. The mechanism of claim 1 wherein the annular pin connected to the head support comprises two unconnected arcuate segments and wherein the means connecting the annular pin to the head support is a rod having a width less than the diameter of the annular pin extending between the two segments, the rod pivotally connected to the segments midway between their ends for adjustment of the headrest about the pivotal connection.
3. In a dental chair having a floor support, padded lower body support, arm supports, head support and adjustable back support, the improvement comprising providing flexible wing portions extending from the upper terminating edge of the back support down each side to a point adjacent the rear of each of the arm supports, allowing a dentist or technician closer access to the patient sitting in the chair by deflection of the wing portions and providing an adjustment mechanism for the head support, the mechanism comprising:
an elongated linking member having two parallel annular openings extending therethrough near each end,
slots in the linking member extending from the outer surface thereof into communication with each of the annular openings, each of the slots allowing the internal diameter of each of the annular openings to be reduced by compression of the linking member adjacent the slots;
an open-ended channel extending through the linking member essentially transverse to the axis of each of the annular openings and communicating with the slots and a segment of each of the annular openings;
annular pins received in each of the annular openings, each pin having an external diameter slightly less than the internal diameter of the respective annular opening in the uncompressed state, allowing free rotation thereof, each pin having a channel extending around the outer circumference thereof;
means connecting one of the annular pins to the head support and the other annular pin to the means for attachment to the back support;
a pin extending through the open-ended channel of the linking member communicating with the respective channels in the annular pins to retain the annular pins in place in the linking member;
retaining means at one end of the pin to retain the pin in place in the open-ended channel; and
cam means connected to the opposite end of the pin for exerting tension on the pin relative to the linking member to compress the linking member, reducing the diameter of the annular openings and frictionally engaging the annular pins to lock them against rotation.
4. The mechanism of claim 3 wherein the annular pin connected to the head support comprises two unconnected arcuate segments and wherein the means connecting the annular pin to the head support is a rod having a width less than the diameter of the annular pin extending between the two segments, the rod pivotally connected to the segments midway between their ends for adjustment of the headrest about the pivotal connection. .Iadd. 5. In a dental chair including a back support having two sides and a top, and two spaced apart arm supports mounted by the back support adjacent opposite sides thereof, two arm slings respectively associated with the two arm supports, each arm sling comprising:
means mounted by the back support adjacent one side thereof, said means extending behind and adjacent the respective arm support for engaging the arms of a patient so as to maintain the patient's arms close to the patient's body while sitting in the chair,
said means including a deflectable portion moveable (1) relatively toward the patient from an original position by application of a force directed toward the patient in order to permit close access to the patient while sitting in the chair, and (2) relatively away from the patient unitl resuming said original position upon termination of such force application. .Iaddend..Iadd. 6. The dental chair of claim 5, wherein each of said arm slings comprises sling support means secured to and extending from the back support adjacent said respective arm support, and wherein each of said deflectable portions comprises flexible sheet means extending between the sling support means and the back support..Iaddend. .Iadd. 7. The chair of claim 6, further comprising a headrest mounted by the back support..Iaddend. .Iadd.8. The chair of claim 7, further comprising means operatively associated with said headrest and the back support for adjusting the position of said headrest with respect to the back support. .Iaddend.
US05/757,328 1973-05-18 1977-01-06 Dental chair and adjustable head support mechanism therefor Expired - Lifetime USRE29811E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US361591A US3858937A (en) 1973-05-18 1973-05-18 Dental chair and adjustable head support mechanism therefor

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US361591A Reissue US3858937A (en) 1973-05-18 1973-05-18 Dental chair and adjustable head support mechanism therefor

Publications (1)

Publication Number Publication Date
USRE29811E true USRE29811E (en) 1978-10-24

Family

ID=23422641

Family Applications (2)

Application Number Title Priority Date Filing Date
US361591A Expired - Lifetime US3858937A (en) 1973-05-18 1973-05-18 Dental chair and adjustable head support mechanism therefor
US05/757,328 Expired - Lifetime USRE29811E (en) 1973-05-18 1977-01-06 Dental chair and adjustable head support mechanism therefor

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US361591A Expired - Lifetime US3858937A (en) 1973-05-18 1973-05-18 Dental chair and adjustable head support mechanism therefor

Country Status (1)

Country Link
US (2) US3858937A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5564668A (en) * 1995-02-15 1996-10-15 Crowe, Ii; Marvin E. Computer stand for vehicles
US6626496B2 (en) * 2000-05-01 2003-09-30 J. Morita Manufacturing Corporation Dental treatment chair assembly
US6893098B2 (en) 2003-10-07 2005-05-17 Kambiz Kohani Chair mounted back support system
US20060113830A1 (en) * 2004-11-01 2006-06-01 Hersh Nelson M Dental chair headrest
US7226130B2 (en) 2002-09-12 2007-06-05 Steelcase Development Corporation Seating with comfort surface
US7290836B2 (en) 2003-08-28 2007-11-06 A-Dec, Inc. Patient chair
US8876210B2 (en) 2012-11-27 2014-11-04 Beaver State Dental, Inc. Double articulating dental chair headrest apparatus
WO2018165319A1 (en) * 2017-03-07 2018-09-13 Movi Medical, Llc Reclining transport chairs
US10893754B1 (en) 2020-04-09 2021-01-19 Jay Patrick Cooke Modular and adjustable headrest
US10973507B2 (en) 2006-02-03 2021-04-13 Biomet Sports Medicine, Llc Method and apparatus for coupling soft tissue to a bone

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3924894A (en) * 1974-10-07 1975-12-09 Sybron Corp Dental chair backrest with integral elbow supports
US4300249A (en) * 1980-03-25 1981-11-17 Taylor Francis H Chair for neurologically impaired patients
US4466662A (en) * 1981-11-12 1984-08-21 The United States Of America As Represented By The Secretary Of The Air Force Powered articulated headrest system
US4674792A (en) * 1985-06-07 1987-06-23 Ikeda Bussan Co, Ltd. Position adjustable see-through headrest
DE8801808U1 (en) * 1988-02-12 1988-06-30 Lebenshilfe Fuer Geistig Behinderte Ortsvereinigung Karlsruhe Und Umgebung E.V., 7500 Karlsruhe, De
US5177823A (en) * 1992-05-13 1993-01-12 Oakworks, Inc. Adjustable headrest
US5427436A (en) * 1994-05-26 1995-06-27 Lloyd; John T. Adjustable headrest
US6076208A (en) * 1997-07-14 2000-06-20 Hill-Rom, Inc. Surgical stretcher
US6397414B1 (en) 2000-06-21 2002-06-04 John T. Lloyd Adjustable face rest
US6578215B1 (en) 2000-09-29 2003-06-17 Hill-Rom Services, Inc. Surgery stretcher

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3197255A (en) * 1964-10-12 1965-07-27 Doris B Caudill Portable back support
US3603642A (en) * 1969-10-13 1971-09-07 Sybron Corp Articulated headrest for dental chairs and the like
US3627379A (en) * 1968-03-13 1971-12-14 Recaro Ag Backrest for a seat especially of a motor vehicle
US3719388A (en) * 1971-05-12 1973-03-06 Den Tal Ez Mfg Co Adjustable headrest assembly for a dental chair
US3729227A (en) * 1971-06-11 1973-04-24 S Ohta Dental chair
US3773382A (en) * 1970-07-10 1973-11-20 Renault Seats, particularly for motor vehicles
US3924894A (en) * 1974-10-07 1975-12-09 Sybron Corp Dental chair backrest with integral elbow supports

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3197255A (en) * 1964-10-12 1965-07-27 Doris B Caudill Portable back support
US3627379A (en) * 1968-03-13 1971-12-14 Recaro Ag Backrest for a seat especially of a motor vehicle
US3603642A (en) * 1969-10-13 1971-09-07 Sybron Corp Articulated headrest for dental chairs and the like
US3773382A (en) * 1970-07-10 1973-11-20 Renault Seats, particularly for motor vehicles
US3719388A (en) * 1971-05-12 1973-03-06 Den Tal Ez Mfg Co Adjustable headrest assembly for a dental chair
US3729227A (en) * 1971-06-11 1973-04-24 S Ohta Dental chair
US3924894A (en) * 1974-10-07 1975-12-09 Sybron Corp Dental chair backrest with integral elbow supports

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5564668A (en) * 1995-02-15 1996-10-15 Crowe, Ii; Marvin E. Computer stand for vehicles
US6626496B2 (en) * 2000-05-01 2003-09-30 J. Morita Manufacturing Corporation Dental treatment chair assembly
US7226130B2 (en) 2002-09-12 2007-06-05 Steelcase Development Corporation Seating with comfort surface
US7360835B2 (en) 2002-09-12 2008-04-22 Steelcase Inc. Seating with comfort surface
US7677670B2 (en) 2003-08-28 2010-03-16 A-Dec, Inc. Patient chair
US8033613B2 (en) 2003-08-28 2011-10-11 A-Dec, Inc. Patient chair
US7290836B2 (en) 2003-08-28 2007-11-06 A-Dec, Inc. Patient chair
US20080067852A1 (en) * 2003-08-28 2008-03-20 A-Dec, Inc., Patient chair
US7140691B2 (en) 2003-10-07 2006-11-28 Joe Dentist, Inc. Chair with torso support system
US20050194830A1 (en) * 2003-10-07 2005-09-08 Kambiz Kohani Chair with torso support system
US6893098B2 (en) 2003-10-07 2005-05-17 Kambiz Kohani Chair mounted back support system
US20090039694A1 (en) * 2004-11-01 2009-02-12 Nelson Mark Hersh Dental chair headrest
US7448686B2 (en) 2004-11-01 2008-11-11 Nelson Mark Hersh Dental chair headrest
US20060113830A1 (en) * 2004-11-01 2006-06-01 Hersh Nelson M Dental chair headrest
US10973507B2 (en) 2006-02-03 2021-04-13 Biomet Sports Medicine, Llc Method and apparatus for coupling soft tissue to a bone
US8876210B2 (en) 2012-11-27 2014-11-04 Beaver State Dental, Inc. Double articulating dental chair headrest apparatus
WO2018165319A1 (en) * 2017-03-07 2018-09-13 Movi Medical, Llc Reclining transport chairs
US10893754B1 (en) 2020-04-09 2021-01-19 Jay Patrick Cooke Modular and adjustable headrest
US11154140B1 (en) 2020-04-09 2021-10-26 Jay Patrick Cooke Modular and adjustable headrest

Also Published As

Publication number Publication date
US3858937A (en) 1975-01-07

Similar Documents

Publication Publication Date Title
USRE29811E (en) Dental chair and adjustable head support mechanism therefor
US6540300B2 (en) Armrest for chair, armchair or similar, a chair using said armrest
US3124328A (en) kortsch
US5154449A (en) Extensible rod
US3950026A (en) Chair or a wheeled chair
US5427436A (en) Adjustable headrest
US5039167A (en) Movable footrest for handicap and styling chair
US6431649B1 (en) Working chair with synchronous seat and back adjustment
US7717833B1 (en) Adjustable, reversible exercise apparatus with converging and diverging motion
DE3666330D1 (en) Working chair
AU2003236489B2 (en) Headrest Support and Adjustment Mechanism
CA1332146C (en) Work chair or office chair
CZ212993A3 (en) Apparatus for practicizing dentist's operations
GB2173696A (en) Chair
US9521908B1 (en) Head rest for chair
TWM586565U (en) Chair armrests
US5232265A (en) Vertical back adjust for chairs
US5823920A (en) Exercise machine
US4375902A (en) Locking headrest for dental chair
US6325455B1 (en) Reclining chair
CN215226102U (en) Chair convenient to adjust
CN210540086U (en) Device for adjusting inclination angle of seat
AU2019100879A4 (en) Chair seat sliding and locking mechanism
US2130083A (en) Dental articulator
CN220384683U (en) Mounting structure for realizing adjustment of seat backrest