US3351379A - Chairs - Google Patents

Chairs Download PDF

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Publication number
US3351379A
US3351379A US534939A US53493966A US3351379A US 3351379 A US3351379 A US 3351379A US 534939 A US534939 A US 534939A US 53493966 A US53493966 A US 53493966A US 3351379 A US3351379 A US 3351379A
Authority
US
United States
Prior art keywords
block
bolt
seat assembly
stem
seat
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.)
Expired - Lifetime
Application number
US534939A
Other languages
English (en)
Inventor
Street Leslie John
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.)
Tan Sad Chair Co 1931 Ltd
Original Assignee
Tan Sad Chair Co 1931 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 Tan Sad Chair Co 1931 Ltd filed Critical Tan Sad Chair Co 1931 Ltd
Application granted granted Critical
Publication of US3351379A publication Critical patent/US3351379A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
    • A47C1/026—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, 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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
    • A47C1/027—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination by means of clamps or friction locking members
    • 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

Definitions

  • An adjustable chair comprises a back-rest assembly and a seat assembly.
  • a block in which the upright stern of the back-rest assembly is vertically slidably mounted, is angularly adjustable about a horizontal axis on the seat assembly, there being cooperating serrated locking surfaces on the block and seat assembly. Adjustment of the stern relative to the block and the block relative to the seat assembly is controlled by a common bolt that extends rotatably through the block and a vertically elongated slot in the stem to a combined pivotal and threaded connection with the seat assembly.
  • a U-shaped clamping member disposed between the bolt head and the block laterally encloses the block and stem.
  • This invention relates to chairs of the kind commonly known as typists chairs and comprising separate seat and back-rest assemblies.
  • the invention has for its object the provision in a typists chair of improved means for adjusting both the angular and height relationship between the seat and back-rest assemblies which means is of particularly simple construction, is cheap to manufacture, and is easily operated and maintained by the user.
  • a typists chair comprises seat and back-rest assemblies secured together through adjusting means including a block, complementary surfaces (preferably having complementary serrations) on the block and seat assembly capable of selective engagement to determine the angular position of the block in relation to the seat assembly about a horizontal axis, a dependant stem of the seat assembly abutting the block, and a bolt passing through a vertically elongated slot in the stem and through the block in a direction perpendicular to the complementary surfaces to have screw engagement with the seat assembly, the rotation of the bolt serving simultaneously to clamp the block in its selected angular position and to clamp the stem against said block at a selected height both in relation to the seat assembly.
  • adjusting means including a block, complementary surfaces (preferably having complementary serrations) on the block and seat assembly capable of selective engagement to determine the angular position of the block in relation to the seat assembly about a horizontal axis, a dependant stem of the seat assembly abutting the block, and a bolt passing through a vertically elongated slot in the
  • FIGURE 1 is a part-sectional side elevation showing the parts of a typists chair relevant to the invention.
  • FIGURE 2 is a fragmentary and part-sectional plan View of certain of the parts of FIGURE 1 on an enlarged scale.
  • a typists chair comprises a seat assembly including a die cast seat frame 3 adapted to surmount a pedestal and to carry a seat pad (both not shown) and a back-rest assembly including a pad 4 mounted on the head of a stem 5 of rectangular crosssection adapted for attachment to the seat frame 3 via an adjusting means.
  • the adjusting means comprises a block 6 having a flat rear face 7 and horizontally extending serrations 8 in a cylindrically concave front face protruding forwardly beyond a pair of cylindrically concave marginal portions 9.
  • the block 6 has a bore 10 extending along a radius from Patented Nov. 7, 1967 the horizontal axis of curvature O of the cylindrically concave faces 8 and 9.
  • An integral rear portion 11 of the frame 3 is provided with inner and outer cylindrically convex regions 12 and 13 complementary to the concave faces 8 and 9 of the block, and the inner convex face 12 has serrations complementary to those of the block face 8.
  • the serrated portion 12 of the seat frame embodies a vertically elongated slot 14.
  • the adjusting means further comprises a clamping member 15 of U-shape in horizontal cross-section having side flanges 25 shaped to overlap portions of the sides of the stem 5, the sides of the block 6, and marginal parts of the seat frame portion 11, thereby to conceal the major part of the block.
  • the clamping member is formed with a central bore 16.
  • the adjusting means is completed by a bolt 17 which extends from an integral hand piece 18, forming the head of the bolt through the close fitting bore 16 in the clamping member, through a vertically elongated slot 19 in the stem 5, through the close fitting bore 10 in the block 6, and through the elongated slot 14 in the seat frame 3 to have screw engagement with an element in the form of a cylindrical cross-bar 20 journalled at the axis of curvature O of the serrated portions 8 and 12 and between a pair of flanges 21 integral with the seat frame.
  • a pin or circlip 22 may be mounted in or about the bolt 17 to prevent accidental withdrawal of the bolt from the crossbar 2%).
  • the hand piece 18 In use, to adjust both the angle and height of the backrest assembly in relation to the seat frame assembly the hand piece 18 is manually rotated sufliciently to allow disengagement of the complementary serrated parts 8 and 12 and so permit angular movement together of the block 6, stem 5, clamping member 15, bolt 17 and cross bar 20 in relation to the seat frame 3 about the horizontal axis 0 within the limits determined by the available movement of the bolt 17 within the seat frame slot 14. Simultaneously the height of the back-rest stem 5 is adjusted by its sliding between the clamping member 15 and block 6. After selection of both the angle and height of the back-rest assembly the hand piece 18 is rotated in a direction to tighten the parts and to re-engage the complementary serrations 8 and 12 so as to lock the adjusting means in selected position.
  • a compression spring 23 can be mounted about the bolt 17 to abut between the cross-bar 20 and block 6 so as to bias the latter away from the seat frame 3 and so facilitate slackening of the parts.
  • a chair for typists and the like comprising seat and back-rest assemblies secured together through adjusting means including a block, complementary surfaces on the block and seat assembly capable of selective locked engagement to determine the angular position of the block about a horizontal axis, a dependant stem of the seat assembly slidably connected to the block, a bolt passing through a vertically elongated slot in the stem and through the block in a direction substantially perpendicular to the complementary surfaces, and coacting means on said bolt and said seat assembly providing a combined pivotal and threaded connection therebetween whereby rotation of said bolt in one direction enables said complementary surfaces to be released and permits said block and bolt to swing together about said connection angularly relative to the seat assembly, and rotation of the bolt in the opposite direction serves simultaneously to clamp the block to the seat assembly in the selected angular position and to clamp the stem against the block at a selected height in relation to the seat assembly.
  • a chair according to claim 1 comprising a clamping member disposed between a head of the bolt and the stem whereby when the bolt is rotated in said opposite direction the stem is clamped between the clamping member and said block.
  • clamping member is of U-shape in horizontal cross-section with side flanges overlying the sides of the stem and block.
  • a chair according to claim 2, wherein the block and seat assembly comprise second complementary and cylindrically curved surfaces coaxial with and horizontally spaced from the surfaces incorporating the serrations.
  • a chair according to claim 1 wherein spring means is compressed between the block and the seat assembly for urging said complementary surfaces apart When said bolt is rotated in said one direction.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
US534939A 1965-02-13 1966-02-01 Chairs Expired - Lifetime US3351379A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6342/65A GB1124241A (en) 1965-02-13 1965-02-13 Improvements in chairs

Publications (1)

Publication Number Publication Date
US3351379A true US3351379A (en) 1967-11-07

Family

ID=9812749

Family Applications (1)

Application Number Title Priority Date Filing Date
US534939A Expired - Lifetime US3351379A (en) 1965-02-13 1966-02-01 Chairs

Country Status (6)

Country Link
US (1) US3351379A (zh)
BE (1) BE676145A (zh)
CH (1) CH446636A (zh)
FR (1) FR1467594A (zh)
GB (1) GB1124241A (zh)
NL (1) NL6601755A (zh)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5511852A (en) * 1993-02-25 1996-04-30 Herman Miller, Inc. Adjustable backrest for a chair
US6250715B1 (en) 1998-01-21 2001-06-26 Herman Miller, Inc. Chair
US6273506B1 (en) 1995-06-07 2001-08-14 Herman Miller, Inc. Chair with an adjustable seat
US20100148556A1 (en) * 2008-12-16 2010-06-17 Kuo-Ching Chou Angle-Adjusting Structure for Backrest of Chair
US20110260517A1 (en) * 2010-04-26 2011-10-27 Yao-Chuan Wu Multi-Section Angle Adjusting Structure for a Chair Back
US8262162B2 (en) 2007-01-29 2012-09-11 Herman Miller, Inc. Biasing mechanism for a seating structure and methods for the use thereof
US11612249B2 (en) * 2021-05-27 2023-03-28 Comfort Office Furniture Co., Ltd Guangdong Chair chassis and chair

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2443058B (en) * 2006-09-30 2011-09-21 Huang Yucheng Adjustment apparatus for a swivel chair

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1277726A (en) * 1918-04-16 1918-09-03 Howard G Hunn Chair-iron.
US1696153A (en) * 1924-08-16 1928-12-18 Bettcher Stamping & Mfg Compan Chair
US1860096A (en) * 1928-02-20 1932-05-24 Tan Sad Chair Co 1931 Ltd Chair, seat and the like
US2137335A (en) * 1936-08-21 1938-11-22 Tan Sad Chair Co 1931 Ltd Chair, seat, and the like
US2421702A (en) * 1944-11-13 1947-06-03 Posture Res Corp Adjustable chair back
US2590718A (en) * 1943-05-12 1952-03-25 Lundquist Carl Ernst Edward Adjustable chair back
US2845994A (en) * 1956-02-23 1958-08-05 Tan Sad Chair Co 1931 Ltd Adjustable clamping means for the back rest of a chair or seat

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1277726A (en) * 1918-04-16 1918-09-03 Howard G Hunn Chair-iron.
US1696153A (en) * 1924-08-16 1928-12-18 Bettcher Stamping & Mfg Compan Chair
US1860096A (en) * 1928-02-20 1932-05-24 Tan Sad Chair Co 1931 Ltd Chair, seat and the like
US2137335A (en) * 1936-08-21 1938-11-22 Tan Sad Chair Co 1931 Ltd Chair, seat, and the like
US2590718A (en) * 1943-05-12 1952-03-25 Lundquist Carl Ernst Edward Adjustable chair back
US2421702A (en) * 1944-11-13 1947-06-03 Posture Res Corp Adjustable chair back
US2845994A (en) * 1956-02-23 1958-08-05 Tan Sad Chair Co 1931 Ltd Adjustable clamping means for the back rest of a chair or seat

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5511852A (en) * 1993-02-25 1996-04-30 Herman Miller, Inc. Adjustable backrest for a chair
US6273506B1 (en) 1995-06-07 2001-08-14 Herman Miller, Inc. Chair with an adjustable seat
US6513222B2 (en) 1995-06-07 2003-02-04 Herman Miller, Inc. Method for adjusting a seat
US6250715B1 (en) 1998-01-21 2001-06-26 Herman Miller, Inc. Chair
US6367876B2 (en) 1998-01-21 2002-04-09 Herman Miller, Inc. Chair
US7004543B2 (en) 1998-01-21 2006-02-28 Herman Miller, Inc. Chair
US8262162B2 (en) 2007-01-29 2012-09-11 Herman Miller, Inc. Biasing mechanism for a seating structure and methods for the use thereof
US20100148556A1 (en) * 2008-12-16 2010-06-17 Kuo-Ching Chou Angle-Adjusting Structure for Backrest of Chair
US7802847B2 (en) * 2008-12-16 2010-09-28 Kuo-Ching Chou Angle-adjusting structure for backrest of chair
US20110260517A1 (en) * 2010-04-26 2011-10-27 Yao-Chuan Wu Multi-Section Angle Adjusting Structure for a Chair Back
US8251449B2 (en) * 2010-04-26 2012-08-28 Yao-Chuan Wu Multi-section angle adjusting structure for a chair back
US11612249B2 (en) * 2021-05-27 2023-03-28 Comfort Office Furniture Co., Ltd Guangdong Chair chassis and chair

Also Published As

Publication number Publication date
GB1124241A (en) 1968-08-21
BE676145A (zh) 1966-06-16
NL6601755A (zh) 1966-08-15
FR1467594A (fr) 1967-01-27
CH446636A (de) 1967-11-15

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