CA2365056A1 - Improved tilt control mechanism for tilt back chair - Google Patents

Improved tilt control mechanism for tilt back chair Download PDF

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Publication number
CA2365056A1
CA2365056A1 CA002365056A CA2365056A CA2365056A1 CA 2365056 A1 CA2365056 A1 CA 2365056A1 CA 002365056 A CA002365056 A CA 002365056A CA 2365056 A CA2365056 A CA 2365056A CA 2365056 A1 CA2365056 A1 CA 2365056A1
Authority
CA
Canada
Prior art keywords
actuator
tilt
adjustment
torsion spring
control mechanism
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.)
Granted
Application number
CA002365056A
Other languages
French (fr)
Other versions
CA2365056C (en
Inventor
Richard M. Holbrook
Darren M. Mark
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.)
Virco Manufacturing Corp
Original Assignee
Virco Mgmt Corp
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 Virco Mgmt Corp filed Critical Virco Mgmt Corp
Publication of CA2365056A1 publication Critical patent/CA2365056A1/en
Application granted granted Critical
Publication of CA2365056C publication Critical patent/CA2365056C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/025—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame
    • A47C3/026—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame with central column, e.g. rocking office chairs; Tilting chairs
    • 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
    • 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
    • A47C7/441—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with adjustable elasticity

Abstract

An improved tilt rate control mechanism for a tilt back chair has an adjustable torsion spring, a tilt rate adjustment actuator and an actuator movement mechanism. The torsion spring has an adjustment lever for adjusting the tension on the torsion spring. The tilt rate adjustment actuator is disposed in contact with the adjustment lever such that the movement of the adjustment actuator causes movement of the adjustment lever.
The adjustment actuator is moveable between (i) a first actuator position wherein the actuator is proximal to the torsion spring and the adjustment lever is in a minimum tension position, and (ii) a second actuator position wherein the actuator is distal from the torsion spring and the adjustment lever is in a maximum tension position.
CA002365056A 2001-06-15 2001-12-12 Improved tilt control mechanism for tilt back chair Expired - Lifetime CA2365056C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/881,987 US6585320B2 (en) 2001-06-15 2001-06-15 Tilt control mechanism for a tilt back chair
US09/881,987 2001-06-15

Publications (2)

Publication Number Publication Date
CA2365056A1 true CA2365056A1 (en) 2002-12-15
CA2365056C CA2365056C (en) 2005-05-17

Family

ID=25379652

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002365056A Expired - Lifetime CA2365056C (en) 2001-06-15 2001-12-12 Improved tilt control mechanism for tilt back chair

Country Status (3)

Country Link
US (1) US6585320B2 (en)
CA (1) CA2365056C (en)
WO (1) WO2002102201A1 (en)

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US11419425B2 (en) * 2017-10-05 2022-08-23 Godrej & Boyce Mfg. Co. Ltd. Posture adaptive work chair
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GB2572805B (en) * 2018-04-12 2022-07-13 Stannah Stairlifts Ltd Improvements in or relating to stairlifts
EP3741258A1 (en) * 2019-05-20 2020-11-25 BOCK 1 GmbH & Co. KG Chair with seat tilt mechanism
JPWO2020255195A1 (en) * 2019-06-17 2020-12-24
JP7382178B2 (en) * 2019-08-30 2023-11-16 株式会社イトーキ Chair

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Also Published As

Publication number Publication date
WO2002102201A1 (en) 2002-12-27
US20020190555A1 (en) 2002-12-19
CA2365056C (en) 2005-05-17
US6585320B2 (en) 2003-07-01

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Effective date: 20211213