DK0815778T3 - Improvements in systems for differential bending of backrests on office chairs - Google Patents

Improvements in systems for differential bending of backrests on office chairs

Info

Publication number
DK0815778T3
DK0815778T3 DK96440052T DK96440052T DK0815778T3 DK 0815778 T3 DK0815778 T3 DK 0815778T3 DK 96440052 T DK96440052 T DK 96440052T DK 96440052 T DK96440052 T DK 96440052T DK 0815778 T3 DK0815778 T3 DK 0815778T3
Authority
DK
Denmark
Prior art keywords
seat
backrests
systems
office chairs
bar
Prior art date
Application number
DK96440052T
Other languages
Danish (da)
Inventor
Frederiks Faiks
Pascal Jaeger
Philippe Mayeur
Robert M Scheper
Original Assignee
Steelcase Strafor Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Steelcase Strafor Sa filed Critical Steelcase Strafor Sa
Application granted granted Critical
Publication of DK0815778T3 publication Critical patent/DK0815778T3/en

Links

Classifications

    • 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
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
    • 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
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03266—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with adjustable elasticity
    • 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
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office 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
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03277—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with bar or leaf springs
    • A47C1/03279—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with bar or leaf springs of torsion type

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

An office chair comprises a seat (A) and a back (D) made with two independently-adjustable spinal support sections, one for the thoracic and the other for the lumbar region of the spine. The back is connected by a bar (3) to a control box (B) beneath the seat equipped with two torsion bars (1,5) - one for the bar (3) and the other for columns (6) pivoted to the lumbar support section of the seat back and having different levels of elastic resistance. The seat back is made from glass fibres embedded in polyester foam, and the two torsion bars are positioned so that they act in sequence, the second coming into operation after the first.
DK96440052T 1996-06-28 1996-06-28 Improvements in systems for differential bending of backrests on office chairs DK0815778T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96440052A EP0815778B1 (en) 1996-06-28 1996-06-28 Improvements for systems with differential shaping of back supports of office chairs

Publications (1)

Publication Number Publication Date
DK0815778T3 true DK0815778T3 (en) 1998-09-23

Family

ID=8225411

Family Applications (1)

Application Number Title Priority Date Filing Date
DK96440052T DK0815778T3 (en) 1996-06-28 1996-06-28 Improvements in systems for differential bending of backrests on office chairs

Country Status (5)

Country Link
EP (1) EP0815778B1 (en)
AT (1) ATE162937T1 (en)
DE (1) DE69600161T2 (en)
DK (1) DK0815778T3 (en)
ES (1) ES2114755T3 (en)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6557939B1 (en) 1998-10-21 2003-05-06 Vitra Patente Ag Adjustment mechanism, back cover and arm rest for a chair
IT1308075B1 (en) * 1999-06-04 2001-11-29 Pro Cord Srl CHAIR WITH OSCILLATING SEAT
CA2422015A1 (en) * 2000-09-19 2002-03-28 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
CA2626453C (en) 2002-02-13 2011-02-01 Herman Miller, Inc. Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof
DE102007044130A1 (en) * 2007-09-15 2009-03-19 König + Neurath AG Backrest, in particular, of an office chair
KR100903215B1 (en) 2008-10-10 2009-06-18 주식회사 시디즈 Tilting chair
NL1037679C2 (en) * 2010-02-03 2011-08-04 Konink Ahrend N V CHAIR, IN PARTICULAR AN OFFICE CHAIR.
USD637423S1 (en) 2010-04-13 2011-05-10 Herman Miller, Inc. Chair
USD657166S1 (en) 2010-04-13 2012-04-10 Herman Miller, Inc. Chair
USD652657S1 (en) 2010-04-13 2012-01-24 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
AU2011267475B2 (en) 2010-06-15 2015-12-24 MillerKnoll, Inc Chair
CH704814A2 (en) * 2011-04-12 2012-10-15 Vitra Patente Ag Chair mechanism with synchronously adjustable alignment of the backrest and seat.
DE202012007254U1 (en) * 2012-07-26 2013-10-28 Proflm Sp. Z.O.O. Seating furniture, in particular office chair
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
US8998339B2 (en) 2012-09-20 2015-04-07 Steelcase Inc. Chair assembly with upholstery covering
NO2908696T3 (en) * 2012-10-18 2018-05-05
CA3026655A1 (en) 2016-06-11 2017-12-14 Humanscale Corporation Chair with articulating backrest
EP3927215A4 (en) 2019-02-21 2023-03-15 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3072436A (en) * 1960-04-14 1963-01-08 Moore Edwin Rosco Tilting devices for chair seats and chair backs
DE3719784A1 (en) * 1987-06-13 1988-12-22 Roeder Soehne Sitzmoebelfab A piece of seating furniture
US5249839A (en) * 1991-11-12 1993-10-05 Steelcase Inc. Split back chair

Also Published As

Publication number Publication date
DE69600161T2 (en) 1998-09-17
ATE162937T1 (en) 1998-02-15
DE69600161D1 (en) 1998-03-19
EP0815778B1 (en) 1998-02-04
EP0815778A1 (en) 1998-01-07
ES2114755T3 (en) 1998-06-01

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