WO2024253601A4 - Multi pivot tilting seat support structure - Google Patents

Multi pivot tilting seat support structure

Info

Publication number
WO2024253601A4
WO2024253601A4 PCT/TH2024/000002 TH2024000002W WO2024253601A4 WO 2024253601 A4 WO2024253601 A4 WO 2024253601A4 TH 2024000002 W TH2024000002 W TH 2024000002W WO 2024253601 A4 WO2024253601 A4 WO 2024253601A4
Authority
WO
WIPO (PCT)
Prior art keywords
seat
assembly
support structure
adjustable
support
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.)
Ceased
Application number
PCT/TH2024/000002
Other languages
French (fr)
Other versions
WO2024253601A1 (en
Inventor
Klaus Jürgen KUMMER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Levitask
Chaichana Suladda
Original Assignee
Levitask
Chaichana Suladda
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 Levitask, Chaichana Suladda filed Critical Levitask
Priority to CN202480029856.3A priority Critical patent/CN121099936A/en
Publication of WO2024253601A1 publication Critical patent/WO2024253601A1/en
Publication of WO2024253601A4 publication Critical patent/WO2024253601A4/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • A47C1/03255—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
    • A47C1/03272—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
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03283—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with fluid springs

Landscapes

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

Abstract

A seat support apparatus is provided. The seat support apparatus is used as a seat support mechanism, whereby a seat pan (D) is pivotally moved from a higher forward inclined seating position to a lower backward reclined seating position over a transverse pivotal axis with a fulcrum representing the knee joint (4.b). The apparatus comprises two transverse pivotally hinged pairs of levers, which form a parallelogram between a bearing base (2) and a seat pan support plate (6). The seat pan support plate (6) forms a parallelepiped with two unequal facing sides, in which a rear pivotal lever (4) is longer than a pivotal front lever (5), so that the rotation simulates the rotation of the thigh with the fulcrum in the knee joint (4.b) and thus evenly supports the length of the thigh through its entire movement. A third transverse mounted pivotal lever (7) is engaging by means of a helical surface gear (7.2) with the rear pivotal lever (4) in a point (4.4) to force a reverse synchronized movement of the backrest when tilting upward thus opening the angle between thigh and the upper body.

Claims

AMENDED CLAIMS received by the International Bureau on 22 December 2024 (22.12.2024)
1. A chair, comprising an adjustable seat support structure to modify the posture of a seated person with a dual tilt mechanism, which allows and supports both a forward inclining and a rearward reclining seating posture comprising: a foundation base assembly A; a height adjustable seat support column assembly B; an adaptive seat support link C, positioned on the base assembly A and the seat support column B to move vertically up and down to accommodate various person heights and pivot 360 degrees horizontally around a vertical axis related to base assembly A; an adaptive and lockable dual tilt mechanism C, supporting a pivotal seat assembly D configured to support a seated persons upper leg; a dynamic moving seat support C, that facilitates a modulated pivotal motion through a transverse parallelepiped lever assembly, which is at the bottom pivotally hinged to the base housing of the support and at the top is pivotally hinged to the top plate, which enables and simulates an arc path with the fulcrum in the knee joint, allowing the seat surface to maintain permanent contact with the full length of a person's thigh; a seat assembly D, which is mounted to the top plate of the support structure C and comprises a concave recessed portion at the rear along a longitudinal midline of the seat support structure with a portion of the flexible seat support assembly configured to receive the rearward lower pelvic area, e.g. the seat bones, and a flat forward portion to support the thigh; a seat assembly D with a bowl portion at the rear of the flexible seat support structure configured to arrest the buttock protrusion of the lower pelvis when inclining forward and wherein the recessed bowl portion has greater flexibility than the overall flexibility of the seat support structure; a seat assembly D with a fabric cover, which has added frictional rubber dots to its surface, to create slide resistance when the seat is tilting forward; a backrest support portion F & G, which is adjustable and lockable horizontal and vertical by sliding on a 90 degree j-bar fixed to the seat support C and comprises a shell G, foam padding and a backbone support structure F; an armrest support portion E, which is mounted permanent to the backrest portion G and follows the vertical and horizontal adjustment of the backrest movement, allowing the ergonomic alignment of the elbows with the corresponding position of the lumbar support of the backrest; a headrest portion H, which is mounted to the back rest support portion F by a j-bar and is vertical adjustable by means of frictional resistance inside the slide slot of portion F and horizontal adjustable by a slide slot inside the headrest adaptor arrestable by means of a knob or screw.
2. An adjustable support structure C as in claim 1, comprising a lever handle to lock or unlock the height adjustable seat support column assembly B;
3. An adjustable support structure C as in claim 1, describing a modulated vertical and forward motion on a simulated path of an arc, that has its fulcrum in the knee joint and thus enabling a mounted seat pan to maintain permanent even contact with the entire length of the thigh of a person seated upon it.
4. An adjustable support structure C as in claims 1 - 2, wherein an assembly of the portions of the in claim 1 described parallelepiped facilitates, but does not limit, a longitudal rearward tilting angle of the seat pan of at least minus 5 degrees below a horizontal alignment of the seat pan D.
5. An adjustable support structure C as in claim 3, wherein the assembly of the portions described in claim 1 facilitates, but does not limit, an up- and forward tilting angle of the seat pan D of at least plus 18 degrees over the horizontal alignment of the seat pan D.
6. An adjustable seat support assembly C as in claim 2, which comprises an uplifting force in the form of a longitudinal mounted pneumatic lockable gas spring, which at the lower end is fixed onto the adaptive seat support assembly base and at the upper end to the rear transverse mounted pivotal lever in a semi lying position within the seat support structure, which allows a seated person to move in response to the weight of the user bearing onto the seat assembly from a higher first forward position to a second lower rearward position, when the gas spring is unblocked, and secondly arrests the seat assembly between the first and second position when blocked by releasing the locking lever handle attached to the support assembly C.
7. An adjustable seat support structure C as in any of the claims 1 - 5, provided with an adaptive means to accommodate a fixed angle j-bar bracket to carry the backrest assembly G & F, being adjustable horizontally by means of a slide in the support structure C and lockable by a wheel knob.
8. An adjustable support structure as in claims 1-6, which facilitates the mounting of a flat or modulated seat pan assembly to be fixed on top of the support structure C.
9. A backrest support assembly G & F as in claims 1-7, which is height adjustable to allow for lumbar alignment and adjustable in depth to accommodate various user sizes.
PCT/TH2024/000002 2023-05-02 2024-01-18 Multi pivot tilting seat support structure Ceased WO2024253601A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202480029856.3A CN121099936A (en) 2023-05-02 2024-01-18 Multi-pivot tilting seat support structure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
THPCT/TH2023/000011 2023-05-02
PCT/TH2023/000011 WO2024228680A1 (en) 2023-05-02 2023-05-02 Multi pivot tilting seat support structure

Publications (2)

Publication Number Publication Date
WO2024253601A1 WO2024253601A1 (en) 2024-12-12
WO2024253601A4 true WO2024253601A4 (en) 2025-09-18

Family

ID=93333206

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/TH2023/000011 Ceased WO2024228680A1 (en) 2023-05-02 2023-05-02 Multi pivot tilting seat support structure
PCT/TH2024/000002 Ceased WO2024253601A1 (en) 2023-05-02 2024-01-18 Multi pivot tilting seat support structure

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/TH2023/000011 Ceased WO2024228680A1 (en) 2023-05-02 2023-05-02 Multi pivot tilting seat support structure

Country Status (2)

Country Link
CN (1) CN121099936A (en)
WO (2) WO2024228680A1 (en)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1002523C2 (en) * 1996-03-04 1997-09-05 Rudimec B V Tilting office chair.
DE19823632C1 (en) * 1998-05-27 1999-09-30 Roeder Peter Office chair
CA2375917A1 (en) * 1999-06-28 2001-01-04 Studio Innova Inc. An improved open-angle seat for a chair
JP2001178779A (en) * 1999-12-22 2001-07-03 Matsushita Electric Works Ltd Stand-up assisting chair
GB0609315D0 (en) * 2006-05-11 2006-06-21 Technicon Internat Man Service Improved seat
ITTO20070398A1 (en) * 2007-06-06 2008-12-07 Malenotti S R L "CHAIR WITH OSCILLATING BACKREST"
US8944507B2 (en) * 2009-10-13 2015-02-03 Herman Miller, Inc. Ergonomic adjustable chair mechanisms
US8272692B1 (en) * 2009-10-26 2012-09-25 Epperson Ronald B Office chair having tiltable seat and back
KR101009490B1 (en) * 2010-04-28 2011-01-21 주식회사 토치 A chair having a moving structure of a seat plate portion in which a sitting position is adjusted
WO2014021796A1 (en) * 2012-08-03 2014-02-06 Kummer Klaus Juergen Adjustable support structure
GB2553750B (en) * 2016-06-28 2019-06-05 Posturite Ltd Seat tilting mechanism
WO2019156641A1 (en) * 2018-02-07 2019-08-15 CHAICHANA, Suladda An adjustable seat support structure
US10383448B1 (en) * 2018-03-28 2019-08-20 Haworth, Inc. Forward tilt assembly for chair seat
JP7809642B2 (en) * 2020-02-21 2026-02-02 アエテロン ゲーエムベーハー chair

Also Published As

Publication number Publication date
WO2024253601A1 (en) 2024-12-12
CN121099936A (en) 2025-12-09
WO2024228680A1 (en) 2024-11-07

Similar Documents

Publication Publication Date Title
JP3255592B2 (en) Furniture components for stools and connection reinforcements with interlocking backrest and seat adjustment
US7585028B2 (en) Mobile ergonomic rotating adjustable chair with lumbar support
US8662586B2 (en) Dynamically balanced seat assembly having independently and arcuately movable backrest and method
JPS5929244B2 (en) adjustable back chair
US20110101748A1 (en) Ergonomic Adjustable Chair Mechanisms
EP2156766B1 (en) Chair (variants)
JPS6348529B2 (en)
JPH07248A (en) Adjustable back rest of chair
CN101742946A (en) Furniture device with adjustable angle between the seat and the back of the piece of furniture
EP0413732A1 (en) Reclining chair
US11844440B2 (en) Chair
JPH10165252A (en) Furniture member for chair interlocking adjustment of back rest and seat
CA2302063A1 (en) Ergonomic chair
US5213395A (en) Adjustable seating assembly
US20120119552A1 (en) Automatically adjustable chair structure
WO2024253601A4 (en) Multi pivot tilting seat support structure
KR20210015185A (en) Ergonomic office chair with improved performance
JP3080585B2 (en) Chair
US4792187A (en) Pivot mechanism for seats
CN212878495U (en) Back seat linkage device for chair
EP0584152A1 (en) A chair
JPH0235235Y2 (en)
KR19980025851U (en) Frames for Reclining Chairs
JPS62117503A (en) Apparatus for holding balance of seat backrest of backrest tiltable seat
JPH0456613B2 (en)

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24819703

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE