US2689599A - Chair - Google Patents

Chair Download PDF

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Publication number
US2689599A
US2689599A US116456A US11645649A US2689599A US 2689599 A US2689599 A US 2689599A US 116456 A US116456 A US 116456A US 11645649 A US11645649 A US 11645649A US 2689599 A US2689599 A US 2689599A
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United States
Prior art keywords
housing
seat
chair
bearing
thrust
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
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US116456A
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English (en)
Inventor
Mauser Alfons
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.)
Mauser KG
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Mauser KG
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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
    • A47C3/02—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
    • 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
    • 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
    • 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
    • A47C7/443—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with coil springs

Definitions

  • This invention relates to reclining articles of furniture, and more particularly to chairs with a rotatable and 'tiltable seat, ⁇ such as office chairs.
  • An object of the present invention is to provide a tiltable oice chair or Ithe like, wherein the springs for returning the seat into its sitting position are invisibly arranged.
  • a further object of the present invention is to provide a tiltable ollice chair or the like, wherein the returning springs may be readily adjusted.
  • Another object of the present invention is to provide a tiltable oflice chair or the like which is of simple construction and may be readily manufactured at low costs.
  • a further lobject of the present invention is t provide a tiltable and rotatable oice chair which has a pleasing appearance.
  • Another object of the present invention is to improve on the construction of tiltable ofce chairs or the like as now ordinarily made.
  • Fig. 1 is a vertical sectional view of an ofce chair according to the invention
  • Fig. 2 is -a sectional View of the chai'rrshown in Fig. 1, wherein, however, the seat is in a reclined position,
  • Fig. 3 is ⁇ a fragmentary sectional view of a detail of the chair shown in Figs. 1 and 2,
  • Fig. 4 is a sectional view taken on line IV-IV of Fig. l,
  • Fig. 5 is an elevational view of a detail of the chair shown in Fig. 1, partly in section,
  • Fig. 6 is a fragmentary sectional view of another embodiment of a chair according to the invention.
  • Fig. 7 is a fragmentary rear elevational view of the chair shown in Fig. 6,
  • Fig. 8 is a sectional view of a further embodiment of a chair according to the invention.
  • Fig. 9 Iis a fragmentary sectional view of a further embodiment of a chair according to the invention.
  • Fig. 10 is a sectional View taken on line Ill-I0 of Fig. 9,
  • Fig. 11 is a fragmentary sectional view of another embodiment of a chair according to the invention.
  • Fig. 12 is a fragmentary rear elevational View of the chair shown in Fig. 1l.
  • the seat-back rest structurel is mounted on a hollow body or housing 2 forming a part of a pedestal including said housing 2 and legs 3 secured Ito the latter for carrying same. Casters of any suitable type are arranged on said legs 3.
  • a thrust-ball-bearing 'I comprising a stationary member and a rotatable member 62.
  • the stationary member 60 is secured to the housing 2 by screws 6I (only one being shown).
  • a ring 63 having a ii'ange 65 is secured to a projecting flange of the stationary member 60 Iby screws Ii'I (only one being shown).
  • the flange 65 of the ring 63 overlapping the rim of the rotatable member 62 prevents an undesired separation of the members 60 and 62 in vertic-al direction.
  • the rotatable member 62 carries two bearings 8.
  • a rod 9 secured vto lugs 64 attached to 'the frame of the seat-back-rest structure I is rotatable in said bearings 8 about a substantially horizontal axis.
  • the 'seat-back-rest structure I is tiltably mounted on the thrust-bearing I at the top of the housing 2.
  • the rotatable member 62 of the thrust-bearing 'I has an aperture 66 in its center and the stationary lmember ⁇ 60 of said thrust bearing has an aperture 68 in its center.
  • a lever 5 rigidly con- ⁇ nected with said rod 9 extends downwardly through the passage 66, 68 of the thrust-bearing 7 into lthe housing 2.
  • One end of a tension spring 4 arranged within said housing 2 is connected to the free end of said lever 5, the other end of said tension spring 4 is connected with an anchoring hook 'I0' carried by the threaded spindle 'I2 of an adjusting device E mounted in the lower portion of the housing 2.
  • the tension of the spring 4 may be readily adjusted by a longitudinal displacement of the hook 'III by means o-f the elements of theV adjusting device 6.
  • la pin 14 secured to the anchoring hook I0 is in engagement with an annular recess I0 of the spindle l2, so that the hook 'I'Il is rotatable relative to 'the spindle 12 of the adjusting device 6 and, consequently, the seat I may be rotated' about the substantially vertical longitudinal axis of the housing 2 without ⁇ twisting the spring Il.
  • the sitting position of the seat I is limited by an abutment of the lever 5 against the vertical surface I2 of the aperture 66 of the rotatable member 62 of the thrust-bearing 1; the extreme reclined position of the seat I is limited by an 3 abutment of the lever 5 against the inclined surface 16 of said 'aperture 66.
  • the tapering surface 13 of the aperture 68 of the stationary member 60 of the thrust-bearing 1 may be in lalignment with the inclined surface 16 of the aperture 66 of the rotatable member 02 as shown in the drawings.
  • Fig. 1 illustrates the chair in the sitting position.
  • the spring 4 yieldingly opposes to such a tilting movement of the seat-back-rest str-ucture.
  • a return movement of the seat-back-rest structure into its normal sitting position is assisted by said spring 4.
  • the action of the latter can be adjusted by the adjusting device 6 as desired by the user of the chair.
  • the seat carried by the thrust-bearing 1 may be rotated relative to the housing 2 about the vertical longitudinal axis Iof the latter into ⁇ any desired position.
  • the seat remains always in the same level during such a rota-tion.
  • the housing 102 is rotatably mounted on the supporting pedestal 1 16 by means of a thrustball-bearing 101, the member 160 of which is connected with said pedestal 116 and *the member 102 of which is connected with the housing 2.
  • Means of the ⁇ type shown in Fig. 3 may be arranged for preventing a vertical separation of the members 110 and 162.
  • the housing 102 is closed at the top by a member 118 having an aperture 160.
  • the seat 101 is -tiltably mounted on said member 118 at 109 at a point spaced from the vertical longitudinal axis of the housing 102.
  • a structure including rods 11S and a yplate I 19 is connected with the lower end of the link 105.
  • a plate 121 having bores slidably engaged with said rods 118 is connected to the upper end of a rod 120, the lower end ci which is connected with an ⁇ anchoring hook 110 carried by a spindle 112 of an adjusting device 106 arranged in the lower portion of the housing 102.
  • 11 larranged within the housing 102 Iand interposed between the plates 119 and 121 tends to urge the seat 1 into its sitting position limited by an abutment of a stop 182 arranged on the link 105 against the member 110. The tension of said spring 1 11 yieldingly opposing a tilting movement of the seat 101 may be adjusted by the adjusting device 106.
  • the inclined position of the seat 101 may be limited by adjustable stops 111 mounted on projections 113 of the bearings 108 carried by the member
  • the seat may be rotated together with the housing 102 relative to the pedestal l 16 irrespective of its tilting position. Such a rotation has 4 no inuence 4on the spring 1 11, as the housing 102 is rotated together with the ⁇ seat 101.
  • the thrust-bearing 101 is not under the action of the spring 1 11, so that its 4dimensions must be calcul-ated only for the load to be expected by a person resting on the chair.
  • a member 216 having an aperture 280 is rotatably mounted on the pedestal 216 by means of a thrust-bearing 201.
  • the members 260 and 262 of said bearing 201 may be prevented from vertical separation by suitable means for example of :the type shown in Fig. 3.
  • a rod 209 connected with the frame of the seat-back-rest structure 201 by lugs 2611 is rotatably mounted in bearings 200 carried 'by the member 218.
  • the seat 201 may be tilted on the housing 202 and may be rotated together with the housing.
  • a lever 222 rigidly connected with the rod 209 extends through the passage 260 of the member 218 into the housing 202.
  • the free end of said lever 222 is in abutting engagement with one arm of a double-armed lever 223 swingably mounted in the housing 202 at 232 at a point substantially in the longitudinal axis of the housing.
  • the other arm of said lever 223 is connected with a rod 224 carrying a holding member 221.
  • a pair of endless bands 226 of rubber or other resilient material is looped around said holding member 221 and another holding member 284 carrying a rod 285 engaged with an anchoring hook 230 carried by an adjusting device 206.
  • Said adjusting device cornprises a member 23
  • the member 231 of the adjusting device is held in engagement with the member 225 and the latter is held in engagement with the gripping means 220 by the action of the rubber bands 226.
  • the opposing action of said rubber bands to a tilting movement of the seat 201 is stepped up by the doublearmed lever 223.
  • the arrangement of the engaged spherical portions of the members 225 and 231 permits the adjusting device 200 to follow the change in the position of the biasing mechanism 224, 221, l226, 284, 265 caused by a rotation of the lever 223 about its pivot 232.
  • the opposing action of said biasing mechanism may be adjusted by the adjusting device ⁇ 21.16 by turning a setting knob 286 thereof screwed on the threaded end of the hook 230 and engaged with the lower surface of the member 23
  • the stepping up lever 226 could be replaced by another suitable stepping up mechanism.
  • the sitting position of the seat 201 is limited by an abutment of the lever 222 against the straight edge of the aperture 280 of the member 218.
  • the reclined or tilted position of the seat 1 is limited by an adjustable stop 233 mounted on the housing 202 for abutting cooperation with said lever 222.
  • the operation of the chair shown in Fig. 8 is as follows:
  • the lever 222 rigidly connected with the rod 209 actuates the double-armed lever 223 for a swinging movement about its pivot 232.
  • the rubber bands 226 are stretched to a larger degree than they would be stretched if they were directly connected to the lever 222, so that the opposing action of said rubber bands 226 becomes'more effective.
  • may be rotated irrespective of the fact Whether the seat is in the sitting position or in a tilted position.
  • the housing 402 open at its top is rotatably mounted on the pedestal 4
  • extends into the housing 402.
  • is swingably mounted on a shaft 438 carried by the housing 402. The end of the cam-portion 44
  • tiltable about the pivot 438 is limited by an abutment of the end of the cam-portion 44
  • is arranged for slidable engagement with the spherical surface of a member 442 slidably arranged in the housing 402.
  • Said member 442 is under the action of a spring 443 interposed between said member 442 and the plate 444 of an adjusting device 406 arranged on a wall 402 secured to the housing 402.
  • Theupper end of the spring 443 is engaged with a cap arranged in the member 442; the lower end of said spring 443 is sur- ,A
  • the tension of the spring 443 may be adjusted by the adjusting device 406.
  • the spring 443 does not act on the thrust-bearing 4
  • the housing 502 covered by a member 518 is rotatably mounted on the pedestal 5
  • swingably mounted in the bearings 508 attached to the member 518 extends into the housing 502 wherein it is in engagement with a lug 534 arranged on a member 536 rotatably arranged on a shaft 598 secured to the housing 502.
  • a torsion spring 545 having one of its ends secured to said shaft l59
  • the spring 545 made, for example, of ⁇ steel or rubber yieldingly opposes ⁇ tilting movements of the seat 50
  • may be limited by an adjustable stop Slt mounted on the housing 502 for cooperation with the lug 584 of the spring-loaded member 506;
  • a chair according to the invention may be made of elements light in Weight; the chair is comfortable and may be conveniently manipulated.
  • the construction of the chair permits a noiseless rotation and/or tilting of the seat.
  • the chair also, has a neat appearance.
  • a chair comprising: a stationary base-assembly, a rotatable seat-assembly including connecting means and a seat-structure tiltably joined to said connecting means, a thrust-bearing having a stationary member and a rotatable member with annular bearing surfaces, the stationary member of said thrust-bearing being secured to said stationary base-assembly, the rotatable member of said thrust-bearing being in rigid connection with said connecting means of the rotatable seat-assembly, a housing included in one of said two assemblies, and biasing' means arranged within said housing, said biasing means being connected to the tiltable seat-structure of said seat-assembly for yieldingly opposing' a tilting movement thereof.
  • limiting means arranged for abutting cooperation with said tiltable seat-structure so as to limit the extreme reclined position thereof.
  • said biasing means having adjusting means associated therewith for adjusting the opposing action thereof.
  • a chair comprising: a base-assembly, a seatassembly including connecting means and a seatstructure tiltably joined to said connecting means, a thrust-bearing having a stationary member and a rotatable member with annular bearing surfaces, the stationary member of said thrust-bearing being secured to said stationary base-assembly, the rotatable member of said thrust-bearing being in rigid connection with said connecting means of the rotatable seatassembly, a housing included in one of said two assemblies, a passage in the upper portion of said housing, an element rigidly connected with said seat-structure, said element extending through said passage into said housing, and biasing means arranged within said housing, said biasing means being engaged with said element for yieldingly opposing a tilting movement of said seat-structure.
  • a chair comprising: supporting means, a housing rigidly connected with said supporting means, a thrust-bearing having a stationary member and a rotatable member with annular bearing surfaces, the stationary member of said thrust-bearing being secured to said housing, a seat tiltably mounted ⁇ on the rotatable member of said thrust-bearing, and biasing means arranged Within said housing, said biasing means ⁇ being connected to said seat for yieldingly opposing a tilting movement thereof.
  • a chair comprising: supporting means, a
  • a thrust-bearing having a stationary member and a rotatable member, the stationary member of said thrust-bearing being secured to said housing, a seat tiltably mounted on the rotatable member of said thrust-bearing, and biasing means arranged within said housing, said biasing means being connected to said seat for yieldingly opposing a tilting movement thereof.
  • said seat and means rigid therewith forming a tiltable seat-structure, limiting means arranged for abutting cooperation with said tiltable [seatstructure so as to limit the extreme reclined position thereof.
  • said biasing means having adjusting means associated therewith for adjusting the biasing action thereof.
  • a chair comprising: supporting means, a housing rigidly connected with said supporting means, a thrust-bearing having a stationary member and a rotatable member, the stationary member of said thrust-bearing being secured to said housing, a seat tiltably mounted on the rotatable member of said thrust-bearing, a passage in said thrust-bearing, an element rigidly connected with said seat, said element extending through said passage of the thrust-bearing into said housing, and biasing means arranged Within said housing, said biasing means being connected to said element for yieldingly opposing a tilting movement of said seat.
  • said housing having an open upper end, and said thrustbearing covering said open end of said housing.
  • limiting means on said thrust-bearing for cooperation with said element so as to limit the extreme tilted position of said seat.
  • an adjustable limiting device connected to the rotatable member of the thrust-bearing and arranged for cooperation with said element so as to limit a reclined position of said seat.
  • a chair comprising: supporting means, a housing rigidly connected with said supporting means, a thrust-bearing having a stationary member and a rotatable member, the stationary member of said thrust-bearing being secured to said housing, a seat tiltably mounted on the rotatable member of said thrust-bearing, a passage in said thrust-bearing, an element rigidly connected with said seat, said element extending through said passage of the thrust bearing into said housing, and resilient means arranged within said housing, said resilient means being connected to said housing and to said element for yieldingly opposing a tilting movement of said seat.
  • said resilient means including a tension spring, one end of said tension spring being connected to said housing, the other end of said tension spring being connected to said element.
  • a chair comprising: supporting means, a housing rotatably connected with said supporting means for rotation about a vertical axis, a seat tiltably joined to said housing, and biasing means arranged within said housing for acting on said seat so as to yieldingly oppose a tilting movement thereof.
  • said rotatable connection comprising a thrust-bearing having a stationary member and a rotatable member, the stationary member being connected to said supporting means, and the rotatable member being connected to said housing.
  • limiting means arranged on'said housing for cooperation with said seat so as to limit an extreme position thereof.
  • said biasing means having adjusting means associated therewith for adjusting the opposing action thereof.
  • a chair comprising: supporting means, a housing rotatably connected with said supporting means for rotation about a vertical axis, said housing having an aperture at its top, a seat tiltably mounted on said housing, an element connected with said seat, said element extending through said aperture into said housing, and resilient means arranged within said housing, said resilient means acting on said element for yieldingly opposing a tilting movement of the seat.
  • the tiltable connection between the seat and the housing being at a distance from the axis of rotation of the housing, said element being pivotally connected with said seat, and a spring connected to said housing and said element.
  • a chair comprising: supporting means, a housing rotatably connected with said supporting means for rotation about a vertical axis, said housing having an aperture at its top, a seat tiltably mounted on said housing, an element rigidly connected with said seat, said element extending through said aperture into said housing, stepping up means movably mounted in said housing and engaged with said element, a spring, and an anchoring element movably arranged in said housing, one end of said spring being connected to said stepping up means, and the other end of said spring being connected to said anchoring element.
  • a chair comprising: supporting means, a housing rotatably connected with said supporting means for rotation about a Vertical axis, said housing having an aperture at its top, a seat tiltably mounted on said housing, a cam rigidly connected with said seat, said cam extending into said housing, a member movable in said housing, engaging means mounted in said housing, and a spring in said housing engaged with said engaging means and said member for urging the latter into engagement with said cam.
  • said member having a curved surface for cooperation with said cam, and said engaging means including an adjusting device associated with said spring for adjusting the action thereof.
  • a chair comprising: supporting means, a housing rotatably connected with said supporting means for rotation about a vertical axis, said housing having an aperture at its top, a seat tiltably mounted on said housing, an element rigidly connected with said seat, said element extending through said aperture into said housing, and a spring loaded member swingably arranged in said housing for cooperation with said element so as to yieldingly oppose tilting movements of the seat.
  • a chair comprising: supporting means, a housing rotatably connected with said supporting means for rotation about a vertical axis, said housing having an aperture at its top, a seat tiltably mounted on said housing, an element rigidly connected with said seat, said element extending through said aperture into said housing, a member movably arranged in said housing for cooperation with said element said member being in the path of said element upon a tilting movement of said seat, and a torsion spring connected to said housing and said member for yieldingly opposing a tilting movement of said seat upon an engagement of said element with said member.

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  • Chairs Characterized By Structure (AREA)
US116456A 1948-09-21 1949-09-19 Chair Expired - Lifetime US2689599A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1010628T 1948-09-21
DEP10095D DE823920C (de) 1948-09-21 1948-10-02 Drehbarer Kippsessel

Publications (1)

Publication Number Publication Date
US2689599A true US2689599A (en) 1954-09-21

Family

ID=41043820

Family Applications (1)

Application Number Title Priority Date Filing Date
US116456A Expired - Lifetime US2689599A (en) 1948-09-21 1949-09-19 Chair

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US (1) US2689599A (pt)
BE (1) BE488799A (pt)
DE (1) DE823920C (pt)
FR (1) FR1010628A (pt)
NL (1) NL71026C (pt)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2935120A (en) * 1956-07-05 1960-05-03 Glen L Naus Seat and backrest for a locomotive seat
US3185430A (en) * 1960-11-28 1965-05-25 Bernard Charles Henri Marius Height adjustable tilting device for rev olving chairs
US3206153A (en) * 1963-02-25 1965-09-14 Bjorgensen Designs Ltd Tilt swivel mechanism for chairs
US3455601A (en) * 1966-11-02 1969-07-15 Finn Lie Support unit for chair
US3603553A (en) * 1969-10-17 1971-09-07 Doerner Products Co Ltd Chair control
US4974904A (en) * 1989-10-23 1990-12-04 Phillips E Lakin Rocking chair apparatus
US5383709A (en) * 1992-12-03 1995-01-24 Zoetech, Inc. Orthopedic chair with forwardly and rearwardly inclined positions
US20060097558A1 (en) * 2004-11-09 2006-05-11 Girsberger Holding Ag Chair
US9844272B1 (en) 2017-04-25 2017-12-19 Seachrome Corporation Lift assist systems and methods for adjustable seats
US11204296B2 (en) * 2019-07-26 2021-12-21 Chuhan WANG Horizontal instrument, a supporting device and a method for adjusting the bearing surface of the supporting device to be horizontal

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1061983B (de) * 1952-11-27 1959-07-23 Robert Blancke An der auf einer Fahrschiene verschiebbaren Laufkatze freipendelnd aufgehaengter Arbeitssitz
CH328370A (de) * 1955-02-23 1958-03-15 Stoll Albert Ing Dipl Stuhl mit einem allseitig neigbar auf einem Stützschaft angeordneten Sitz
EP0208695B1 (de) * 1985-01-12 1989-08-02 Rolf Völkle Sitzmöbel mit feder für die sitzschale
DE29717571U1 (de) * 1997-10-02 1997-12-18 SIFA Sitzfabrik GmbH, 92237 Sulzbach-Rosenberg Sitzträger für Stühle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH18106A (de) * 1899-04-26 1899-11-15 Hermann Boehme Kippgelenk für Möbel etc.
US1194551A (en) * 1916-08-15 Assiotob
US1711085A (en) * 1926-08-02 1929-04-30 Arcy Frank P D Bus seat
US2363935A (en) * 1941-02-03 1944-11-28 Automatic Products Co Chair
US2498106A (en) * 1945-01-05 1950-02-21 Seng Co Chair iron

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1194551A (en) * 1916-08-15 Assiotob
CH18106A (de) * 1899-04-26 1899-11-15 Hermann Boehme Kippgelenk für Möbel etc.
US1711085A (en) * 1926-08-02 1929-04-30 Arcy Frank P D Bus seat
US2363935A (en) * 1941-02-03 1944-11-28 Automatic Products Co Chair
US2498106A (en) * 1945-01-05 1950-02-21 Seng Co Chair iron

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2935120A (en) * 1956-07-05 1960-05-03 Glen L Naus Seat and backrest for a locomotive seat
US3185430A (en) * 1960-11-28 1965-05-25 Bernard Charles Henri Marius Height adjustable tilting device for rev olving chairs
US3206153A (en) * 1963-02-25 1965-09-14 Bjorgensen Designs Ltd Tilt swivel mechanism for chairs
DE1283457B (de) * 1963-02-25 1969-02-20 Burke Maurice Prentice Kippvorrichtung fuer einen Stuhl
US3455601A (en) * 1966-11-02 1969-07-15 Finn Lie Support unit for chair
US3603553A (en) * 1969-10-17 1971-09-07 Doerner Products Co Ltd Chair control
US4974904A (en) * 1989-10-23 1990-12-04 Phillips E Lakin Rocking chair apparatus
US5383709A (en) * 1992-12-03 1995-01-24 Zoetech, Inc. Orthopedic chair with forwardly and rearwardly inclined positions
US20060097558A1 (en) * 2004-11-09 2006-05-11 Girsberger Holding Ag Chair
US7490902B2 (en) * 2004-11-09 2009-02-17 Girsberger Holding Ag Chair
US9844272B1 (en) 2017-04-25 2017-12-19 Seachrome Corporation Lift assist systems and methods for adjustable seats
US11204296B2 (en) * 2019-07-26 2021-12-21 Chuhan WANG Horizontal instrument, a supporting device and a method for adjusting the bearing surface of the supporting device to be horizontal

Also Published As

Publication number Publication date
DE823920C (de) 1951-12-06
FR1010628A (fr) 1952-06-13
BE488799A (pt)
NL71026C (pt) 1952-10-15

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