IES950622A2 - "A chair tilting mechanism" - Google Patents

"A chair tilting mechanism"

Info

Publication number
IES950622A2
IES950622A2 IE950622A IES950622A IES950622A2 IE S950622 A2 IES950622 A2 IE S950622A2 IE 950622 A IE950622 A IE 950622A IE S950622 A IES950622 A IE S950622A IE S950622 A2 IES950622 A2 IE S950622A2
Authority
IE
Ireland
Prior art keywords
teeth
lock
chair
bias
tilt
Prior art date
Application number
IE950622A
Inventor
William John Hancock
Original Assignee
Ashfield Eng Co Wexford Ltd
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 Ashfield Eng Co Wexford Ltd filed Critical Ashfield Eng Co Wexford Ltd
Priority to IE950622A priority Critical patent/IES950622A2/en
Publication of IES65982B2 publication Critical patent/IES65982B2/en
Publication of IES950622A2 publication Critical patent/IES950622A2/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
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • A47C1/03238—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism
    • 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
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • 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

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Abstract

A chair mechanism (1) has a seat support (11) and a backrest support (50) which can pivot about pins on a fixed support (2). They are interconnected so that their tilting is synchronised. A lock (30) locks the seat support (11) at a certain tilt position with respect to the fixed support (2) and therefore in turn locks the backrest support. The lock (30) has lock members (36,37) with ridges or teeth which interengage to provide positive mechanical locking. The teeth are configured so that tilt bias which is provided by a bias unit (15) urges the teeth into tighter locking engagement once they are engaged. Therefore, accidental release of the actuator does not cause the lock to become released and therefore jerking actions of parts of the chair are avoided. For releasing of the lock, it is necessary for the user to urge parts of the chair against the tilt bias, thereby causing release surfaces on the teeth to slide with respect to each other to urge the locking member (37) away from the locking member (36). The slopes of the surfaces on the teeth are important as they provide for tighter mechanical engagement under the tilt bias and for disengagement when the user urges a chair part against the tilt bias.
IE950622A 1994-08-17 1995-08-17 "A chair tilting mechanism" IES950622A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IE950622A IES950622A2 (en) 1994-08-17 1995-08-17 "A chair tilting mechanism"

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IE940648 1994-08-17
IE950126 1995-02-15
IE950622A IES950622A2 (en) 1994-08-17 1995-08-17 "A chair tilting mechanism"

Publications (2)

Publication Number Publication Date
IES65982B2 IES65982B2 (en) 1995-11-29
IES950622A2 true IES950622A2 (en) 1995-11-29

Family

ID=26319752

Family Applications (2)

Application Number Title Priority Date Filing Date
IE950622A IES950622A2 (en) 1994-08-17 1995-08-17 "A chair tilting mechanism"
IE950623A IE80799B1 (en) 1994-08-17 1995-08-17 A chair tilting mechanism

Family Applications After (1)

Application Number Title Priority Date Filing Date
IE950623A IE80799B1 (en) 1994-08-17 1995-08-17 A chair tilting mechanism

Country Status (5)

Country Link
EP (1) EP0698358A3 (en)
AU (1) AU2857095A (en)
CA (1) CA2156372A1 (en)
GB (1) GB2292313B (en)
IE (2) IES950622A2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996025070A1 (en) * 1995-02-15 1996-08-22 Ashfield Engineering Company Wexford Limited An actuator for a chair mechanism lock
DE29714809U1 (en) * 1997-08-19 1997-11-06 SIFA Sitzfabrik GmbH, 92237 Sulzbach-Rosenberg Seat supports for swivel chairs
DE29804382U1 (en) * 1998-03-12 1998-06-10 SIFA Sitzfabrik GmbH, 92237 Sulzbach-Rosenberg Clamping device for seat supports
EP1211966B1 (en) * 1998-09-18 2006-06-14 Rbm A/S Ergonomic chair
DE19853041A1 (en) * 1998-11-18 2000-05-25 Stoll Sedus Ag Device for synchronously adjusting the seat and backrest of a chair
GB0010238D0 (en) 2000-04-28 2000-06-14 Northeastern Components Intern Locking mechanism for chair and pushbutton control therefor
DE10033418A1 (en) 2000-07-08 2002-01-31 Dauphin Friedrich W Gmbh Chair, especially office chair
US6588843B1 (en) * 2000-10-06 2003-07-08 Ghsp, Incorporated Chair control
US7566099B2 (en) 2003-10-22 2009-07-28 Lord Corporation Furniture seatback tilt recline angle limiter and method
ITVI20080057A1 (en) * 2008-03-07 2009-09-08 Moving S R L ADJUSTMENT DEVICE FOR OFFICE CHAIR
CN104605648B (en) * 2015-01-29 2017-02-22 安吉富和家具有限公司 Synchronous different-angle base plate for backrest and cushion

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1725427A (en) * 1929-08-20 Adjustable chair
FR1117628A (en) * 1954-12-30 1956-05-24 Further development of adjustable back seats
US4062587A (en) 1976-01-13 1977-12-13 Herman Miller, Inc. Back position control device for chairs
GB1565695A (en) * 1977-08-10 1980-04-23 Britax Ltd Reclining seat mechanism
US4494795A (en) * 1982-05-06 1985-01-22 Steelcase Inc. Variable back adjuster for chairs
CH668541A5 (en) * 1986-01-07 1989-01-13 Provenda Marketing Ag WORK CHAIR, ESPECIALLY FOR USE AS OFFICE CHAIR.
GB2193884B (en) 1986-08-16 1989-12-20 Chair Mechanisms Limited A tilting mechanism for a chair
US5161856A (en) * 1990-03-17 1992-11-10 Tachi-S Co., Ltd. Reclining device for a seat
IE66531B1 (en) 1991-05-21 1996-01-24 Ashfield Eng Co Wexford Ltd A chair tilting mechanism
AU3647393A (en) 1992-03-10 1993-10-05 Ashfield Engineering Company (Wexford) Limited A chair tilting mechanism

Also Published As

Publication number Publication date
AU2857095A (en) 1996-02-29
IE80799B1 (en) 1999-02-24
GB2292313A (en) 1996-02-21
CA2156372A1 (en) 1996-02-18
IES65982B2 (en) 1995-11-29
GB9516872D0 (en) 1995-10-18
IE950623A1 (en) 1996-02-21
EP0698358A2 (en) 1996-02-28
EP0698358A3 (en) 1996-06-19
GB2292313B (en) 1998-09-23

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Legal Events

Date Code Title Description
FK9A Application deemed to have been withdrawn section 23(9)
FK9A Application deemed to have been withdrawn section 23(9)
MM4A Patent lapsed