US3253858A - Swivel chairs - Google Patents

Swivel chairs Download PDF

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Publication number
US3253858A
US3253858A US425515A US42551565A US3253858A US 3253858 A US3253858 A US 3253858A US 425515 A US425515 A US 425515A US 42551565 A US42551565 A US 42551565A US 3253858 A US3253858 A US 3253858A
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United States
Prior art keywords
chair
swivel
column
spring
seat
Prior art date
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Expired - Lifetime
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US425515A
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English (en)
Inventor
Degen Hugo
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Individual
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Individual
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    • 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
    • A47C3/18—Chairs or stools with rotatable seat
    • 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 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 inclination by means of a 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
    • 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 mounted in a rigid frame
    • A47C3/026—Rocking chairs with seat, or seat and back-rest unit, elastically mounted in a rigid frame with a 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
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/03—Locking members

Definitions

  • the present invention relates to a swivel chair with an upper portion comprising a seat and a back rest and adapted to be returned into a given position by a restoring spring when swivelled out of this position in either direction about its swivel axis.
  • the present invention provides a swivel chair with an upper portion that can be rotated in either direction through any angle and that will then be restored by the restoring spring to its normal position in that direction of rotation which returns it to its normal position through the shortest are.
  • This swivel chair which comprises an upper portion mounted on a horizontal carrier member which in turn is mounted in a pivot hearing at the upper end of a hollow pedestal column standing upright on a base, is characterised in that said restoring spring is a spring rod inside the hollow column, located in a position offset from the column axis and anchored at its bottom end, whereas its upper end loosely engages the rotating pivot member.
  • the spring rod forming the restoring spring is flexed.
  • the bending moment of the spring rod thus increases from zero to a maximum which it reaches when the angle of rotation is 180. From this position the upper portion of the chair can return into its former position in either direction of rotation and the bending moment of the spring thus reduced to zero. However, from any intermediate position the upper portion of the chair will be returned to its former position contrary to the direction of rotation whereby the chair moved tothis intermediate position.
  • FIGURE 1 is a side elevation of a first embodiment of the swivel chair, the upper portion, comprising the seat and back rest, being shown in chain lines,
  • FIGURE 2 is a horizontal section taken on the line IIII in FIGURE 1,
  • FIGURE 3 is a similar section showing the parts in a diiferent position
  • FIGURE 4 is a vertical section, on an enlarged scale, of part of the swivel chair according to FIGURE 1,
  • FIGURE 5 is a horizontal section taken on the line VV in FIGURE 4,
  • FIGURE 6 is a side elevation of a modified form of the swivel chair shown in FIGURE 1,
  • FIGURE 7 is a horizontal section taken on the line V-IIVII in FIGURE 6, and
  • FIGURE 8 is a similar section, showing the parts in a different position.
  • the swivel chair shown in FIGURE 1 comprises a horizontal carrier 1 with a pivot member 2 (FIGURE 4) rotatable in the upper end of a hollow pedestal column 3.
  • the pivot member 2 works in a roller bearing 4 in the end of the tubular pedestal column as indicated in FIG- URE 4.
  • the seating frame 5 of the upper portion comprising the seat and back rest of the chair.
  • the forward end of the horizontal carrier 1 is slightly downwardly offset.
  • a tension spring 6 connects the seating frame 5 to the forward extremity of this offset portion.
  • the foot of the hollow column 3 stands in a baseplate 7..
  • a restoring spring in the form of a rod 8 for instance of spring steel.
  • the bottom end of this spring rod is anchored in a plate 9 secured inside the foot end of the hollow column 3.
  • the upper end of the spring rod 8 has a ball head 10 which loosely engages a radial recess 11 in the underside of the pivot member '2.
  • any swivel motion of the upper portion of the chair also rotates the pivot member 2 in the upper end of the .hollow column 3.
  • the spring rod 8 is thereby deflected and, according to the angle of the swivel motion, the rod may be carried for instance into a position such as that shown in chain lines in FIGURES 4 and 5.
  • a screw 12 is provided in the pedestal column 3 at a point which corresponds to the position of the ball head 10 of the spring rod 8 when the latter is in its undeflected state.
  • the front end of the screw is formed with a spherical socket which seeks to intercept and retain the ball head 10 of the spring rod.
  • a safety hoop [13 is hingeably affixed to the underside of the seating frame 5.
  • the hoop cooperates with a row of teeth 14 located on the same side of the pedestal column 3, that is to say on that side of the column which faces away from the tilting axis of the seat of the chair.
  • Engagement of the cross bar of the hoop 13 between two neighbouring teeth .14 locks the chair in the corresponding position of tilt (cf. FIGURE 2).
  • the chair For releasing the hoop 13 the chair need merely be slightly swivelled out of its normal position (cf. FIGURE 3).
  • the seat can then be tilted as required into a difierent angle, either contrary to or yielding to the pull of tension spring 6.
  • the teeth 14 i for cooperation with the safety hoop 13 are replaced by a series of peripheral ribs 15 surroundingthe pedestal column 3 in tiers, said ribs having a tangential fiat on one side of the median plane of the chair perpendicular to its tilting axis.
  • FIGURE 7 In order'to release the safety hoop 13 from engagement with the ribs, as in FIGURE 7, the seat must be swivelled until the cross bar of the hoop is parallel with the tangential flat, as in FIGURE 8, in which position it can ride up and down the peripheral ribs for the selection of a different angle of tilt of the seat.
  • spring 8 which has been flexed by the swivel motion restores the chair into its former position, the cross bar of the safety hoop 13 will automatically slide into a corresponding gap between two different neighbouring peripheral ribs 15.
  • a swivel chair comprising a base, a hollow pedestal column vertically mounted on the base, a rotatable pivot member at the upper end of said column, a horizontal carrier member secured to said pivot member, seat and back rest portions mounted on said carrier member, and restoring spring means for returning said carrier member to a former position when swivelled in either direction from said position, said restoring spring means comprising a spring rod provided inside said hollow column in a position offset from the column axis and anchored at its bottom end with its upper end loosely engaging said rotatable pivot member so that the latter may perform an unlimited number of revolutions.
  • a swivel chair according to claim 2 comprising a screw passing through the column Wall at a point in the column corresponding to the position of said ball head when undeflected, said screw having at its forward end a spherical recess which seeks to intercept said .ball head when the spring rod restores the carrier member to its normal position of rest.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
US425515A 1964-01-23 1965-01-14 Swivel chairs Expired - Lifetime US3253858A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH82264A CH406551A (de) 1964-01-23 1964-01-23 Drehsessel

Publications (1)

Publication Number Publication Date
US3253858A true US3253858A (en) 1966-05-31

Family

ID=4195994

Family Applications (1)

Application Number Title Priority Date Filing Date
US425515A Expired - Lifetime US3253858A (en) 1964-01-23 1965-01-14 Swivel chairs

Country Status (4)

Country Link
US (1) US3253858A (de)
AT (1) AT241744B (de)
CH (1) CH406551A (de)
DE (1) DE1529478A1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3480249A (en) * 1967-12-11 1969-11-25 Finn Lie Tilting chair construction
US3593954A (en) * 1970-06-04 1971-07-20 Kofabco Inc Swivel connection for a chair
US3662983A (en) * 1970-09-25 1972-05-16 Steelcase Inc Chair control
US4120531A (en) * 1976-12-06 1978-10-17 Stylar Industries, Inc. Vehicle chair and seat belt arrangement for chair
US4603830A (en) * 1983-09-28 1986-08-05 Wilkhahn Wilkening And Hahne Gmbh & Co. Spring mounting apparatus
US4635999A (en) * 1982-10-28 1987-01-13 Flight Equipment And Engineering Ltd. Vehicle seats
NL1036398C2 (nl) * 2009-01-09 2010-07-13 Hans Luijkx Riooltechniek Steuninrichting.
US20200154889A1 (en) * 2018-11-19 2020-05-21 Profim SP. ZO.O Office Chair

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202016007689U1 (de) 2016-12-21 2017-01-26 Fischer EKF GmbH & Co. KG Rückholbeschlag für ein Drehelement

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US488707A (en) * 1892-12-27 Barber s chair
US792127A (en) * 1904-02-03 1905-06-13 Bror C I Hallgren Folding chair.
US1532354A (en) * 1923-11-09 1925-04-07 Joseph S Walton Revolving stool
US2298230A (en) * 1940-07-10 1942-10-06 Radke Hugo Max Cushioning pedestal
US2339953A (en) * 1942-10-20 1944-01-25 Schlorman Herman Tilt back swivel chair
GB840197A (en) * 1957-11-28 1960-07-06 Pel Ltd Swivelling seats
US3107891A (en) * 1962-05-24 1963-10-22 Maurice P Burke Return mechanism for swivels

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US488707A (en) * 1892-12-27 Barber s chair
US792127A (en) * 1904-02-03 1905-06-13 Bror C I Hallgren Folding chair.
US1532354A (en) * 1923-11-09 1925-04-07 Joseph S Walton Revolving stool
US2298230A (en) * 1940-07-10 1942-10-06 Radke Hugo Max Cushioning pedestal
US2339953A (en) * 1942-10-20 1944-01-25 Schlorman Herman Tilt back swivel chair
GB840197A (en) * 1957-11-28 1960-07-06 Pel Ltd Swivelling seats
US3107891A (en) * 1962-05-24 1963-10-22 Maurice P Burke Return mechanism for swivels

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3480249A (en) * 1967-12-11 1969-11-25 Finn Lie Tilting chair construction
US3593954A (en) * 1970-06-04 1971-07-20 Kofabco Inc Swivel connection for a chair
US3662983A (en) * 1970-09-25 1972-05-16 Steelcase Inc Chair control
US4120531A (en) * 1976-12-06 1978-10-17 Stylar Industries, Inc. Vehicle chair and seat belt arrangement for chair
US4635999A (en) * 1982-10-28 1987-01-13 Flight Equipment And Engineering Ltd. Vehicle seats
US4603830A (en) * 1983-09-28 1986-08-05 Wilkhahn Wilkening And Hahne Gmbh & Co. Spring mounting apparatus
EP0135875B1 (de) * 1983-09-28 1988-11-30 Wilkhahn Wilkening + Hahne GmbH + Co. Vorrichtung zur gefederten Schwenkbewegung eines Bauteiles
NL1036398C2 (nl) * 2009-01-09 2010-07-13 Hans Luijkx Riooltechniek Steuninrichting.
WO2010080025A1 (en) 2009-01-09 2010-07-15 Hans Luijkx Riooltechniek Supporting device
US20200154889A1 (en) * 2018-11-19 2020-05-21 Profim SP. ZO.O Office Chair
US10702066B2 (en) * 2018-11-19 2020-07-07 Profim SP. ZO.O Office chair

Also Published As

Publication number Publication date
DE1529478A1 (de) 1969-12-18
AT241744B (de) 1965-08-10
CH406551A (de) 1966-01-31

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