US2590718A - Adjustable chair back - Google Patents

Adjustable chair back Download PDF

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Publication number
US2590718A
US2590718A US2512A US251248A US2590718A US 2590718 A US2590718 A US 2590718A US 2512 A US2512 A US 2512A US 251248 A US251248 A US 251248A US 2590718 A US2590718 A US 2590718A
Authority
US
United States
Prior art keywords
post
chair back
handle
disk
arm
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
US2512A
Other languages
English (en)
Inventor
Lundquist Carl Ernst Edward
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.)
Individual
Original Assignee
Individual
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
Priority claimed from US533370A external-priority patent/US2476258A/en
Application filed by Individual filed Critical Individual
Priority to US2512A priority Critical patent/US2590718A/en
Application granted granted Critical
Publication of US2590718A publication Critical patent/US2590718A/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
    • A47C1/027—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

  • the present invention relates to adjustable chairs having a frame, a seat supported thereby and means for connecting said seat with a chair back adjustably as to its height and angularity.
  • a further object of the invention is to provide connecting means ensuring that the chair back when being adjusted is guided in an unfailing manner and after the adjustment effectively secured against displacement as to its height or angularity.
  • Fig. 1 is a perspective view of an ofiice chair with an adjustable back constructed in accordance with the invention
  • Fig. 2 shows on an enlarged scale the guiding and locking device for the adjustable back in section on the lines II-II of Figs. 1 and 3, and
  • Fig. 3 is a view, partly sectioned, on the line III-III of Fig. 2.
  • the chair comprises a lower frame 16, the threaded tubular center of which is engaged by a spindle 36 carrying an upper frame [2 for the seat 40, which frame is freely rotatable on said spindle and consists of a central portion 34 and outwardly bent brace portions 38.
  • an arm 64 Extending through a slot in one of the said brace portions 38 is an arm 64, which is preferably rigidly connected with the central portion 34 of the same brace, for instance by welding.
  • This arm carries on its other end a gear rim 6'6.
  • Parallel to said gear rim is a clutch disk 16 welded to a hub and provided on its periphery with teeth 12 engaging the teeth of the gear rim 66.
  • a guide element for a post 18, such as a cover 14, is connected to the clutch disk 19, said cover being provided with apertures 16 for the post, which latter carries a chair back 80.
  • the post 18 is provided with a longitudinally extending slot 82 engaged by an element 84 of rectangular cross section.
  • a bolt 86 extending through the hub of the disk 19 and through a central aperture of restricted diameter in the center of the gear rim 66.
  • a nut 88 is screwed onto the end portion of the bolt 86, said end portion having a restricted diameter, so that the gear rim 66 is pressed between the nut and a shoulder 89 of the bolt.
  • the bifurcated end portion of a handle 90 embraces the element 84 and is supported thereon by means of a pin 92.
  • This bifurcated end portion is formed as an eccentric, the eccentric surface 94 of which bears on a disk 96, which, in turn, bears on the post 18. In the position shown in Figs.
  • the gear rim 16 is locked by the disk 66, that is to say, by turning the handle 90 upwards it moves the disk 16 to the left as viewed in Fig. 2 through the medium of the disk 96 and the post I8 in such a manner that the teeth of the two geared elements 66 and I9 engage each other against the action of the spring 98 located therebetween.
  • the eccentric surface 94 thus forces the disk 96 against the post 18 so as to hold it fast.
  • This angular movement may be limited by means of a projection 91 on the disk 10, said projection being brought into contact with the arm 64 when the chair back is lowered.
  • the post 18 has also been released, so that the same may be moved in its longitudinal direction for the adjustment of the height of the chair back 86.
  • the handle 90 which is preferably directed upwardly for the purpose of facilitating an adjustment of the chair back in locked position, cooperates with the element 84 positively guided by the guide 82 of the post 18, the handle will always take a position parallel to the post.
  • a seat supporting frame an arm secured to and extending rearwardly from said frame, a first gear member rigidly secured to said arm, a longitudinally slotted back supporting post, a second gear member on one side of said post and an aper- 55 tured retaining member on the other side of said post rigidly fixed to said second gear member to provide a guide for said post, said post being longitudinally slidable and non-rotatable relative to said guide, a pressure plate located in the aperture in said retaining member, and means for locking said post against movement relative to said arm comprising a locking element fixed to said first gear member and extending through said second gear member, the slot in said post and said pressure plate, and a handle pivoted on said locking member, said handle having a cam located to bear on said pressure plate to draw said gear members into locking engagement and to grip said post between said second gear member and said pressure plate.
  • said locking member includes a block non-rogo tatable in said slot, said handle being pivoted to said block to turn in a plane extending longitudinally of said post.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Hinges (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
US2512A 1943-05-12 1948-01-15 Adjustable chair back Expired - Lifetime US2590718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US2512A US2590718A (en) 1943-05-12 1948-01-15 Adjustable chair back

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE643183X 1943-05-12
US533370A US2476258A (en) 1942-10-03 1944-04-29 Support for vertically adjustable seats
CH260823T 1946-11-09
US2512A US2590718A (en) 1943-05-12 1948-01-15 Adjustable chair back

Publications (1)

Publication Number Publication Date
US2590718A true US2590718A (en) 1952-03-25

Family

ID=47747112

Family Applications (1)

Application Number Title Priority Date Filing Date
US2512A Expired - Lifetime US2590718A (en) 1943-05-12 1948-01-15 Adjustable chair back

Country Status (4)

Country Link
US (1) US2590718A (ru)
CH (1) CH260823A (ru)
FR (1) FR957096A (ru)
GB (1) GB643183A (ru)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2838264A (en) * 1954-07-19 1958-06-10 Matt V Hill Waste can holder
US3147946A (en) * 1961-10-13 1964-09-08 Vacudent Mfg Company Utility stool
US3351379A (en) * 1965-02-13 1967-11-07 Tan Sad Chair Co 1931 Ltd Chairs
US4712870A (en) * 1986-04-03 1987-12-15 Robinson Donald L Fresnell lens and filter for use with computers and the like
US20160157614A1 (en) * 2014-12-08 2016-06-09 Ferdinand Lusch Gmbh & Co. Kg Seating Furniture with Pivotable Functional Part
US9375117B2 (en) 2010-12-09 2016-06-28 Maurice Granger Device for dispensing pre-cut or Z-folded wiping material
US9375118B2 (en) 2011-01-11 2016-06-28 Maurice Granger Device for dispensing pre-cut rolled or Z-folded wiping material
US9526382B2 (en) 2012-09-17 2016-12-27 Maurice Granger Apparatus for dispensing precut materials wound into a coil or folded into a “Z”
US9872589B2 (en) 2011-03-03 2018-01-23 Maurice Granger Device for dispensing pre-cut rolled wiping material

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2927377C2 (de) * 1979-07-06 1983-12-08 Steifensand Sitzmöbel- und Tischfabrik Inh.: F. Martin Steifensand, 8501 Wendelstein Sitzmöbel, insbesondere Bürodrehstuhl
GB2253138B (en) * 1991-02-08 1995-05-03 Evertaut Limited A chair
CA2319870C (en) 1992-06-15 2001-12-04 Herman Miller, Inc. Woven fabric membrane for a seating surface
GB9218366D0 (en) * 1992-08-28 1992-10-14 Black & Decker Inc A locking device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB132968A (ru) *
US369143A (en) * 1887-08-30 Compound swiveling and clamping joint mechanism
US1860096A (en) * 1928-02-20 1932-05-24 Tan Sad Chair Co 1931 Ltd Chair, seat and the like
US1927491A (en) * 1932-03-09 1933-09-19 Tan Sad Chair Co 1931 Ltd Backrest or support for alpha seat or the like
US2137335A (en) * 1936-08-21 1938-11-22 Tan Sad Chair Co 1931 Ltd Chair, seat, and the like

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB132968A (ru) *
US369143A (en) * 1887-08-30 Compound swiveling and clamping joint mechanism
US1860096A (en) * 1928-02-20 1932-05-24 Tan Sad Chair Co 1931 Ltd Chair, seat and the like
US1927491A (en) * 1932-03-09 1933-09-19 Tan Sad Chair Co 1931 Ltd Backrest or support for alpha seat or the like
US2137335A (en) * 1936-08-21 1938-11-22 Tan Sad Chair Co 1931 Ltd Chair, seat, and the like

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2838264A (en) * 1954-07-19 1958-06-10 Matt V Hill Waste can holder
US3147946A (en) * 1961-10-13 1964-09-08 Vacudent Mfg Company Utility stool
US3351379A (en) * 1965-02-13 1967-11-07 Tan Sad Chair Co 1931 Ltd Chairs
US4712870A (en) * 1986-04-03 1987-12-15 Robinson Donald L Fresnell lens and filter for use with computers and the like
US9375117B2 (en) 2010-12-09 2016-06-28 Maurice Granger Device for dispensing pre-cut or Z-folded wiping material
US9375118B2 (en) 2011-01-11 2016-06-28 Maurice Granger Device for dispensing pre-cut rolled or Z-folded wiping material
US9872589B2 (en) 2011-03-03 2018-01-23 Maurice Granger Device for dispensing pre-cut rolled wiping material
US9526382B2 (en) 2012-09-17 2016-12-27 Maurice Granger Apparatus for dispensing precut materials wound into a coil or folded into a “Z”
US20160157614A1 (en) * 2014-12-08 2016-06-09 Ferdinand Lusch Gmbh & Co. Kg Seating Furniture with Pivotable Functional Part
US9867467B2 (en) * 2014-12-08 2018-01-16 Ferdinand Lusch Gmbh & Co. Kg Seating furniture with pivotable functional part

Also Published As

Publication number Publication date
GB643183A (en) 1950-09-15
CH260823A (de) 1949-04-15
FR957096A (ru) 1950-02-13

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