US3059971A - Seat comprising a plurality of individually adjustable back members - Google Patents

Seat comprising a plurality of individually adjustable back members Download PDF

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Publication number
US3059971A
US3059971A US111322A US11132261A US3059971A US 3059971 A US3059971 A US 3059971A US 111322 A US111322 A US 111322A US 11132261 A US11132261 A US 11132261A US 3059971 A US3059971 A US 3059971A
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Prior art keywords
seat
chair
back rest
members
adjustable back
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Expired - Lifetime
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US111322A
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Becker Otto Alfred
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Individual
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Individual
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Publication date
Priority to DEB57483A priority Critical patent/DE1221772B/en
Priority to CH540161A priority patent/CH413263A/en
Priority to GB16822/61A priority patent/GB925337A/en
Application filed by Individual filed Critical Individual
Priority to US111322A priority patent/US3059971A/en
Priority to FR863225A priority patent/FR1298392A/en
Application granted granted Critical
Publication of US3059971A publication Critical patent/US3059971A/en
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Expired - Lifetime legal-status Critical Current

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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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/023—Reclining or easy chairs having independently-adjustable supporting parts the parts being horizontally-adjustable seats ; Expandable seats or the like, e.g. seats with horizontally adjustable parts
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/24—Chairs or stools with vertically-adjustable seats with vertical spindle
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/402—Support for the head or the back for the back adjustable in height
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/405—Support for the head or the back for the back with double backrests
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/445—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with bar or leaf springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs

Definitions

  • a back rest frame is adjustably mounted in the seat frame for forward and rearward displacement relative thereto and supports two separate back rests or pads, namely one for the small of the back of the chair occupant and a second for the upper or shoulder portion of his back, each back rest or pad being adjustable in vertical direction.
  • FIG. 1 is a rear view of a vertically adjustable swivel chair.
  • FIG. 2 is a side elevation of this chair
  • FIG. 3 shows a detail of FIG. 2 in a side elevation on an enlarged scale.
  • the vertically adjustable swivel chair comprises a chair frame 1 with base ring 2, a seat 3 resting upon a seat frame 15, 16, 17 mounted on said chair frame, and padlike back supporting members 4a, 4b.
  • the lower member 4a serves to support the small of the human back
  • the upper member 4b serves to support the human body above the small of the back.
  • Each of the members 4a, 4b is individually vertically slidably mounted on a resilient back rest frame formed by round-section steel rods 5a and 5b, respectively, and secured thereto with set screws 6a and 6b, respectively, which cooperate with bridge members 70 and 7b, respectively, to force the round-section rods 5:: and 5b against the members 4a, 4b, respectively.
  • said back supports may be mounted on said bridge members 7a, 7b, pivotably on horizontal spindles 9a, 9b and supported by springs 10a, 1012.
  • an adjustable chair comprising in combination (a) a substantially horizontal seat frame,
  • each of said back rest frames adjustably mounted upon said seat frame for individual displacement forwardly and rearwardly relative thereto
  • an adjustable chair comprising in combination (a) a substantially horizontal seat frame,

Description

0a. 23, 1962 o. A. BECKER 3,
SEAT COMPRISING A PLURALITY OF INDIVIDUALLY ADJUSTABLE BACK MEMBERS 2 Sheets-Sheet 1 Filed May 19, 1961 Oct. 23, 1962 o. A. BECKER 3,059,971
SEAT COMPRISING A PLURALITY OF INDIVIDUALLY ADJUSTABLE BACK MEMBERS Filed May 19, 1961 2 Sheets-Sheet 2 United States Patent 3,059,971 SEAT COMPRISING A PLURALITY 0F INDI- VIDUALLY ADJUSTABLE BACK MEMBERS Otto Alfred Becker, 59 Robert-Koch-Str. Saarbrucken, Germany Filed May 19, 1961, Ser. No. 111,322 2 Claims. (Cl. 297353) This invention relates to chairs and similar seating devices and more particularly to devices of that type which include a seat frame and an adjustable back rest frame.
In known seating devices of said type a back rest frame is adjustably mounted in the seat frame for forward and rearward displacement relative thereto and supports two separate back rests or pads, namely one for the small of the back of the chair occupant and a second for the upper or shoulder portion of his back, each back rest or pad being adjustable in vertical direction.
The said known seating devices did not, however, permit a completely satisfactory adaptation of the back rests to many particular body shapes of the chair occupant. To avoid the said and other disadvantages I use according to my invention two separate and mutually independent back rest frames each of which is adjustably mounted in the seat frame being individually forwardly and rearwardly displaceable relative thereto, and each of which supports a vertically adjustable back rest or pad namely one for the small of the back and one for the shoulder portion of the chair occupant.
The said and other objects of my invention will be more fully understood from the following specification when read with the accompanying drawing in which one embodiment is illustrated. In the drawing FIG. 1 is a rear view of a vertically adjustable swivel chair.
FIG. 2 is a side elevation of this chair, and
FIG. 3 shows a detail of FIG. 2 in a side elevation on an enlarged scale.
As shown in the drawing the vertically adjustable swivel chair comprises a chair frame 1 with base ring 2, a seat 3 resting upon a seat frame 15, 16, 17 mounted on said chair frame, and padlike back supporting members 4a, 4b. The lower member 4a serves to support the small of the human back and the upper member 4b serves to support the human body above the small of the back. Each of the members 4a, 4b is individually vertically slidably mounted on a resilient back rest frame formed by round-section steel rods 5a and 5b, respectively, and secured thereto with set screws 6a and 6b, respectively, which cooperate with bridge members 70 and 7b, respectively, to force the round-section rods 5:: and 5b against the members 4a, 4b, respectively.
These round-section rods 5a and 5b which carry the padlike members 4a, 4b extend below the seat 3 through angle members 8a, 8b formed with appropriate holes so 5 that the rods can be individually displaced forwardly or rearwardly (see FIG. 3). This enables an exact adaptation of the also vertically adjustable back supports 4a,
"ice
4b to the individual form of the seated human body. Additionally the said back supports may be mounted on said bridge members 7a, 7b, pivotably on horizontal spindles 9a, 9b and supported by springs 10a, 1012.
While one specific embodiment of my invention has been shown and described in detail to illustrate the application of the principles of my invention, it will be well understood that the same may be otherwise embodied without departing from such principles.
What I claim as my invention is:
1. In an adjustable chair the improvement comprising in combination (a) a substantially horizontal seat frame,
(b) a substantially vertical back-supporting chair portion composed of two mutually independent back rest frames;
(0) each of said back rest frames adjustably mounted upon said seat frame for individual displacement forwardly and rearwardly relative thereto,
(d) a first back rest or pad mounted on one of said back rest frames for adjustment in vertical direction relative to the small of the back of the chair occupant and a second back rest or pad mounted on the other back rest frame for adjustment in vertical direction relative to the shoulders of such chair occupant,
(e) and retaining means for securing the said back rest frames and the said back rests or pads in any individually adjusted position.
2. In an adjustable chair the improvement comprising in combination (a) a substantially horizontal seat frame,
(b) a substantially vertical back-supporting chair portion composed of two mutually independent L-shaped back rest frames having a horizontal and an upstanding arm,
(c) said horizontal arms slidably and adjustably mounted in said seat frame for individual displacement forwardly and rearwardly relative thereto,
(d) a first back rest or pad mounted on one of said upstanding arms for adjustment in vertical direction relative to the small of the back of the chair occupant, and asecond back rest or pad mounted on the other of said upstanding arms for adjustment in vertical direction relative to the shoulders of such chair occupant, and
(e) retaining means for securing the said back rest frames and the said back rests or pads in any individually adjusted position.
References Cited in the file of this patent UNITED STATES PATENTS 693,685 Case Feb. 18, 1902 2,063,732 Gailey Dec. 8, 1936 2,400,630 Cramer May 21, 1946 FOREIGN PATENTS 332,759 Great Britain July 31, 1930
US111322A 1960-04-13 1961-05-19 Seat comprising a plurality of individually adjustable back members Expired - Lifetime US3059971A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DEB57483A DE1221772B (en) 1960-04-13 1960-04-13 Seating
CH540161A CH413263A (en) 1960-04-13 1961-05-08 Seating furniture with an adjustable backrest that can be adapted to the shape of the body
GB16822/61A GB925337A (en) 1960-04-13 1961-05-09 Improvements in or relating to seats each having an adjustable back
US111322A US3059971A (en) 1960-04-13 1961-05-19 Seat comprising a plurality of individually adjustable back members
FR863225A FR1298392A (en) 1960-04-13 1961-05-29 Chair or similar piece of furniture comprising a subdivided, elastic and movable backrest as well as a sliding seat

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DEB57483A DE1221772B (en) 1960-04-13 1960-04-13 Seating
CH540161A CH413263A (en) 1960-04-13 1961-05-08 Seating furniture with an adjustable backrest that can be adapted to the shape of the body
GB16822/61A GB925337A (en) 1960-04-13 1961-05-09 Improvements in or relating to seats each having an adjustable back
US111322A US3059971A (en) 1960-04-13 1961-05-19 Seat comprising a plurality of individually adjustable back members
FR863225A FR1298392A (en) 1960-04-13 1961-05-29 Chair or similar piece of furniture comprising a subdivided, elastic and movable backrest as well as a sliding seat

Publications (1)

Publication Number Publication Date
US3059971A true US3059971A (en) 1962-10-23

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US111322A Expired - Lifetime US3059971A (en) 1960-04-13 1961-05-19 Seat comprising a plurality of individually adjustable back members

Country Status (5)

Country Link
US (1) US3059971A (en)
CH (1) CH413263A (en)
DE (1) DE1221772B (en)
FR (1) FR1298392A (en)
GB (1) GB925337A (en)

Cited By (46)

* Cited by examiner, † Cited by third party
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US3215470A (en) * 1964-05-22 1965-11-02 Milsco Mfg Co Seat with adjustable elements
US3469883A (en) * 1967-07-20 1969-09-30 Hyland C Flint Seat assembly
US3765718A (en) * 1972-01-10 1973-10-16 C Chen Folding chair
DE2820063A1 (en) * 1977-05-09 1978-12-07 Center Design Res & Dev CHAIR
US4602818A (en) * 1983-01-13 1986-07-29 Roder Gmbh Sitzmobelwerke Apparatus for the attachment of a lower back support upholstery to a chair
US4732423A (en) * 1986-10-27 1988-03-22 Bio-Architectural Design, Inc. Invalid's chair construction
US4744603A (en) * 1986-04-10 1988-05-17 Steelcase Inc. Chair shell with selective back stiffening
WO1989009557A1 (en) * 1988-04-12 1989-10-19 Giordano Pasutto An adjustable lumbar cushion used for chairs, arm-chairs and others
US5385388A (en) * 1991-11-12 1995-01-31 Steelcase Inc. Split back chair
US5730688A (en) * 1996-03-28 1998-03-24 Prusick; Vincent R. Portable abdominal-lumbar exercise device
US5944382A (en) * 1996-10-09 1999-08-31 Center For Design Research And Development N.V. Adjustable seating
USD429926S (en) * 1999-04-27 2000-08-29 Zi-Wen Cao Backrest support frame for a chair
US6126235A (en) * 1999-10-25 2000-10-03 Grove; James E. Chair back with adjustable lumbar cushion and clothes hanger hook included within a handle
US6146317A (en) * 1996-03-28 2000-11-14 Prusick; Vincent R. Exercising device
US6193315B1 (en) * 1999-02-26 2001-02-27 Hoshino Gakki Kabushiki Kaisha Backrest structure of a chair, particularly a drum chair
US20020033626A1 (en) * 2000-09-19 2002-03-21 Han-Keel Yoo Chair for correcting an improper alignment of spinal vertebrae and method for correcting an improper alignment of spinal vertebrae by means of the chair
GB2390795A (en) * 2002-07-18 2004-01-21 Thomas William Douglas Harper Back support for fishing tackle seat box
US6843530B1 (en) * 2003-12-23 2005-01-18 Yao-Chuan Wu Multi-stage backrest assembly
WO2005006917A2 (en) * 2003-07-09 2005-01-27 Sanchez Gary L Task chair
US20050029849A1 (en) * 2003-06-23 2005-02-10 Goetz Mark W. Tilt chair
US20050184570A1 (en) * 2002-03-29 2005-08-25 Sanchez Gary L. Task chair
US20050189810A1 (en) * 2003-12-23 2005-09-01 Yao-Chuan Wu Multi-stage backrest assembly
US7040703B2 (en) * 2002-03-29 2006-05-09 Garrex Llc Health chair a dynamically balanced task chair
US20060175884A1 (en) * 2005-02-09 2006-08-10 Jenkins Jeffrey B Mobile ergonomic rotating adjustable chair with lumbar support
US7222920B1 (en) * 2005-06-17 2007-05-29 Washington James N Adjustable chair
US20070188003A1 (en) * 2005-07-04 2007-08-16 Wu Wenjin Chair with armrests
GB2448688A (en) * 2007-04-23 2008-10-29 Jcm Seating Solutions Ltd A segmented seat back assembly
US7523992B1 (en) * 2007-08-02 2009-04-28 Da Yin Wei Tong Co., Ltd. Mechanisms for flexibly securing J-bar to chair backrest and chair headrest respectively
US7625046B2 (en) 2002-03-29 2009-12-01 Garrex Llc Task chair
US20100164266A1 (en) * 2008-12-29 2010-07-01 L & P Property Management Company Seat with independently adjustable user support assemblies
US20110304192A1 (en) * 2010-06-15 2011-12-15 Augustat Betty A Ergometric Chair Apparatus
US20120299350A1 (en) * 2009-01-23 2012-11-29 Backjoy Orthotics, Inc. Apparatus and system for dynamically correcting posture
US20130069411A1 (en) * 2011-09-21 2013-03-21 Brock Walker Bi-level headrest, body support structure and method of supporting a user's cranium
US8419133B2 (en) 2007-01-29 2013-04-16 Herman Miller, Inc. Seating structure with independently adjustable back
US20130175839A1 (en) * 2010-06-11 2013-07-11 Youngho Park Chair
US20140221881A1 (en) * 2013-02-06 2014-08-07 Better Back Technologies, LLC Device for repetitive spine extension at selectable lumbar levels for stimulation of vertebral segments
US20150015042A1 (en) * 2009-01-23 2015-01-15 Backjoy Orthotics, Llc Apparatus and system for dynamically correcting posture
FR3047394A1 (en) * 2016-02-10 2017-08-11 Revology Sa CHAIR WITH FLEXIBLE LUMBAR SUPPORT
US10827841B1 (en) * 2019-09-24 2020-11-10 Zhongshan Shi Songlin Furniture Co., Ltd Chair waist backrest height adjusting device
US10842281B2 (en) 2012-09-20 2020-11-24 Steelcase Inc. Control assembly for chair
US11109683B2 (en) 2019-02-21 2021-09-07 Steelcase Inc. Body support assembly and method for the use and assembly thereof
US11229294B2 (en) 2012-09-20 2022-01-25 Steelcase Inc. Chair assembly with upholstery covering
US11304528B2 (en) 2012-09-20 2022-04-19 Steelcase Inc. Chair assembly with upholstery covering
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US20220322833A1 (en) * 2020-02-10 2022-10-13 X-Chair, LLC Chair assemblies, systems, and apparatuses having integrated technologies, and related methods
US11744375B2 (en) * 2021-07-14 2023-09-05 Anthro Form, Llc Seat configuration

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EP0277912B1 (en) * 1987-01-30 1990-09-19 Equus Marketing Ag Chair, especially an office chair with a seat and a composite back support
US4795212A (en) * 1988-01-29 1989-01-03 Herman Miller, Inc. Chair back adjustment
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EP0379564B1 (en) * 1988-07-19 1993-04-21 "AURA" HERBERT D. STOLLE GMBH & CO. Back-rest
DK0700651T3 (en) * 1994-08-12 1996-08-19 Steelcase Strafor Sa New office chair construction
DE20104124U1 (en) * 2001-03-08 2001-09-27 Schipke Norbert Height-adjustable backrest for vehicle seats and vehicle seats
DE10392285T5 (en) 2002-02-13 2005-05-12 Herman Miller, Inc., Zeeland Recliner with flexible backrest, adjustable armrests and adjustable seat depth and method for its use
ITTO20020775A1 (en) * 2002-09-06 2004-03-07 Pro Cord Spa BACK OF CHAIR.
USD637423S1 (en) 2010-04-13 2011-05-10 Herman Miller, Inc. Chair
USD652657S1 (en) 2010-04-13 2012-01-24 Herman Miller, Inc. Chair
USD657166S1 (en) 2010-04-13 2012-04-10 Herman Miller, Inc. Chair
USD639091S1 (en) 2010-04-13 2011-06-07 Herman Miller, Inc. Backrest
USD650206S1 (en) 2010-04-13 2011-12-13 Herman Miller, Inc. Chair
US8449037B2 (en) 2010-04-13 2013-05-28 Herman Miller, Inc. Seating structure with a contoured flexible backrest
USD653061S1 (en) 2010-04-13 2012-01-31 Herman Miller, Inc. Chair
GB2543565B (en) * 2015-10-23 2019-10-09 Ratstands Ltd Stackable chair

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US2063732A (en) * 1934-11-30 1936-12-08 Florence L Gailey Chair
US2400630A (en) * 1943-01-26 1946-05-21 Roy A Cramer Chair

Cited By (83)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3215470A (en) * 1964-05-22 1965-11-02 Milsco Mfg Co Seat with adjustable elements
US3469883A (en) * 1967-07-20 1969-09-30 Hyland C Flint Seat assembly
US3765718A (en) * 1972-01-10 1973-10-16 C Chen Folding chair
DE2820063A1 (en) * 1977-05-09 1978-12-07 Center Design Res & Dev CHAIR
US4602818A (en) * 1983-01-13 1986-07-29 Roder Gmbh Sitzmobelwerke Apparatus for the attachment of a lower back support upholstery to a chair
US5611598A (en) * 1986-04-10 1997-03-18 Steelcase Inc. Chair having back shell with selective stiffening
US4744603A (en) * 1986-04-10 1988-05-17 Steelcase Inc. Chair shell with selective back stiffening
US4732423A (en) * 1986-10-27 1988-03-22 Bio-Architectural Design, Inc. Invalid's chair construction
WO1989009557A1 (en) * 1988-04-12 1989-10-19 Giordano Pasutto An adjustable lumbar cushion used for chairs, arm-chairs and others
US5385388A (en) * 1991-11-12 1995-01-31 Steelcase Inc. Split back chair
US5730688A (en) * 1996-03-28 1998-03-24 Prusick; Vincent R. Portable abdominal-lumbar exercise device
US6146317A (en) * 1996-03-28 2000-11-14 Prusick; Vincent R. Exercising device
US6312366B1 (en) * 1996-03-28 2001-11-06 Vipa, L.L.C. Exercising device
US5944382A (en) * 1996-10-09 1999-08-31 Center For Design Research And Development N.V. Adjustable seating
US6193315B1 (en) * 1999-02-26 2001-02-27 Hoshino Gakki Kabushiki Kaisha Backrest structure of a chair, particularly a drum chair
USD429926S (en) * 1999-04-27 2000-08-29 Zi-Wen Cao Backrest support frame for a chair
US6126235A (en) * 1999-10-25 2000-10-03 Grove; James E. Chair back with adjustable lumbar cushion and clothes hanger hook included within a handle
US20020033626A1 (en) * 2000-09-19 2002-03-21 Han-Keel Yoo Chair for correcting an improper alignment of spinal vertebrae and method for correcting an improper alignment of spinal vertebrae by means of the chair
US6626494B2 (en) * 2000-09-19 2003-09-30 Han-Keel Yoo Chair and method for correcting an improper alignment of spinal vertebrae
US7963606B2 (en) * 2002-03-29 2011-06-21 Garrex Llc Task chair
US20100038947A1 (en) * 2002-03-29 2010-02-18 Sanchez Gary L Task Chair
US20050184570A1 (en) * 2002-03-29 2005-08-25 Sanchez Gary L. Task chair
US7625046B2 (en) 2002-03-29 2009-12-01 Garrex Llc Task chair
US7396082B2 (en) 2002-03-29 2008-07-08 Garrex Llc Task chair
US7040703B2 (en) * 2002-03-29 2006-05-09 Garrex Llc Health chair a dynamically balanced task chair
GB2390795A (en) * 2002-07-18 2004-01-21 Thomas William Douglas Harper Back support for fishing tackle seat box
US7207629B2 (en) 2003-06-23 2007-04-24 Herman Miller, Inc. Tilt chair
US20050029849A1 (en) * 2003-06-23 2005-02-10 Goetz Mark W. Tilt chair
WO2005006917A2 (en) * 2003-07-09 2005-01-27 Sanchez Gary L Task chair
WO2005006917A3 (en) * 2003-07-09 2005-05-12 Gary L Sanchez Task chair
US6945601B1 (en) * 2003-12-23 2005-09-20 Yao-Chuan Wu Multi-stage backrest assembly
US20050189810A1 (en) * 2003-12-23 2005-09-01 Yao-Chuan Wu Multi-stage backrest assembly
US6843530B1 (en) * 2003-12-23 2005-01-18 Yao-Chuan Wu Multi-stage backrest assembly
US8622474B2 (en) * 2005-02-09 2014-01-07 Jeffrey B. Jenkins Mobile ergonomic rotating adjustable chair with lumbar support
US20090289483A1 (en) * 2005-02-09 2009-11-26 Jenkins Jeffrey B Mobile ergonomic rotating adjustable chair with lumbar support
US9226582B2 (en) 2005-02-09 2016-01-05 Jeffrey B. Jenkins Mobile ergonomic rotating adjustable chair with lumbar support
US7585028B2 (en) * 2005-02-09 2009-09-08 Jenkins Jeffrey B Mobile ergonomic rotating adjustable chair with lumbar support
US9756945B2 (en) 2005-02-09 2017-09-12 Jeffrey Jenkins Mobile ergonomic rotating adjustable chair with lumbar support
US8100476B2 (en) 2005-02-09 2012-01-24 Jenkins Jeffrey B Mobile ergonomic rotating adjustable chair with lumbar support
US20060175884A1 (en) * 2005-02-09 2006-08-10 Jenkins Jeffrey B Mobile ergonomic rotating adjustable chair with lumbar support
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CH413263A (en) 1966-05-15
DE1221772B (en) 1966-07-28
GB925337A (en) 1963-05-08
FR1298392A (en) 1962-07-13

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