US3218021A - Rotatable chair - Google Patents

Rotatable chair Download PDF

Info

Publication number
US3218021A
US3218021A US369764A US36976464A US3218021A US 3218021 A US3218021 A US 3218021A US 369764 A US369764 A US 369764A US 36976464 A US36976464 A US 36976464A US 3218021 A US3218021 A US 3218021A
Authority
US
United States
Prior art keywords
nut
support plate
spindle
bearing
column
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
US369764A
Other languages
English (en)
Inventor
Michalshi Heinz
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
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3218021A publication Critical patent/US3218021A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/24—Chairs or stools with vertically-adjustable seats with vertical spindle
    • A47C3/245—Chairs or stools with vertically-adjustable seats with vertical spindle resiliently supported
    • 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
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/28—Chairs or stools with vertically-adjustable seats with clamps acting on vertical rods

Definitions

  • the present invention relates to chairs wherein a seat member i mounted on spring means and is adjustable vertically by means of a threaded spindle supported within a column or standard and nut means cooperable with the spindle.
  • the problem involved in the art is to combine spring components and adjusting means in such a fashion that such components are available as a prefabricated unit prior to the final assembly of the rotatable chair. Additionally, it should be possible to effect a vertical adjustment of the seat member without the actuation of special locking devices as well as a reduction of the heretofore required dimensions of the chair in the zone of the column or standard.
  • these objects are achieved by mounting at least three truncated conical springs in parallelism within a bell-shaped nut which extends over the end of the column or standard with the lower ends of the springs engaging a support plate which is non-rotatable yet axially shi'fta'ble with respect to the nut up to a limit element for assuring spring tensioning and with the bottom face of the support plate adjoining a support bearing means for the spindle.
  • FIG. 1 is a view inside elevation and partly in cross section of the invention
  • FIG. 2 is a plan View of FIG. 1,
  • FIG. 3 is a view taken along the line A-B of FIG. 2, the view looking in the direction of the arrows,
  • FIG. 4 is a view taken along the line C-D of FIG. 2, the view looking in the direction of the arrows,
  • FIG. 5 is a plan view of the support plate
  • FIG. 6 is a view taken along the line E-F of FIG. 5, the view looking in the direction of the arrows,
  • FIG. 7 is a view in perspective and partly broken away illustrating the bellshaped nut, the support plate and end abutment, and
  • FIG. 8 is a view in perspective partly broken away illustrating the bearing, threaded spindle and the connection between the bearing and spindle for allowing axial movement yet nonrotatable movement to the bearing.
  • a spindle 1 having an ex- "ice ternal screw thread is mounted for rotatable and vertical adjustable movements within a column or standard 11 for the chair.
  • a seat member S is supported by the upper end of the spindle 1 and a base B is provided for the lower end of the column 11.
  • a nut 2 which is substantially bell-shaped is adapted to engage threadedly the external threads of the spindle 1 as indicated at 14 and the lower end of the nut extends below flared upper end 4 of the column 11.
  • four truncated conical springs 3 are located within the nut 2 and are arranged symmetrically about the circumference of the spindle 1.
  • the springs 3 are positioned in outwardly bowed portions 15 formed in the inner periphery of the nut.
  • the upper ends of the spring 3 bear against the closed end of the nut 2 while the lower ends bear against a generally circular support plate 6.
  • the plate 6 is nonrotatably mounted on the spindle 1 but such plate is capable of axial movement relative to the spindle.
  • the support plate 6 is provided with outwardly extending enlargements or base 16 which engage the portions 15 and can be shifted against the pressure of the springs 3 but cannot be rotated relative to the nut 2.
  • the plate 6 rests on an end abutment 5 constituted by an expansible ring which is received by a groove 17 formed in the nut 2 (FIG. 4).
  • a support bearing 7 for the spindle 1 is located adjacent the bottom or lower surface of the plate 6.
  • the bearing 7 is preferably made of synthetic material and is formed with a downwardly tapered stepped surface 10 as shown in FIGURE 8 and which surface lies slidingly against the flared upper end 4 of the column 11.
  • the support plate 6 on its underside is provided with projections 8 which engage corresponding projections 9 formed on the bearing 7.
  • the projections 8 of the plate 6 engage the projections 9 of the bearing 7 so that no relative movement in the circumferential direction can occur between the spindle 1 and the nut 2 as the bearing 7 is held against rotation by the engagement of the projection 7a in the groove 1a. It is only when the seat member is unloaded that an adjustment in height can be made and this is effected by rotating the nut 2 manually. During this operation the projections 8 and 9 are not interlocked or intel-engaged so that relative rotation between the plate 6 and bearing 7 can be effected.
  • the spindle 1 is held firmly by the seat member and upon rotation of the nut 2, depending upon the direction of rotation threads itself either upward or downward in the thread of the nut 2.
  • the flared end 4 of the column 11 also functions as an abutment for locking component 13 which is fitted within the nut 2 so as to contact the end 4 from beneath and such component is secured within the nut by means of an expansible ring 12 which is received in groove 18 of the nut (FIGS. 1 and 4).
  • the assembly of the chair can be effected very simply and easily. Initially, the springs 3 are inserted into the outwardly bowed portions 15 of the nut 2. Next, the support plate 6 is inserted from below into the nut 2 with the enlargements 16 positioned in the portions 15 and the plate is forced upwardly somewhat against the pressure of the springs 3. Thereafter, the end abutment 5 is sprung into the groove 17.
  • the nut 2, springs 3 and support plate 6 constitute a pro-assembled unit.
  • the spindle 1 is then threaded into thread 14- of the nut 2 and after the bearing 7 has been forced from below against the nut 2, the spindle 1, together with the nut 2, springs 3, plate 6 and bearing 7 is inserted into the column 11. After the insertion of the locking component 13 which is secured by means of the expansible ring 12, the entire adjusting and rotating mechanism of the chair is fully mounted. Obviously, such components may readily and easily be detached in the event repair or replacement is necessary.
  • a rotatable chair including a column having an upper end, a threaded spindle mounted within said col umn and having a portion projecting beyond said upper end, a bell-shaped nut threadedly engaging said projecting portion of said spindle and overlapping said upper end of said column, said projecting portion being adapted to carry a seat, a support plate within said nut which is nonrotatable yet axially movable relative to said nut, a plurality of truncated conical springs arranged within the nut in parallelism with the upper ends of the springs engaging the end of the nut and the lower ends of the springs engaging said support plate, an abutment within said nut and below the support plate for limiting axial movement of the support plate in a direction away from the end of the nut, and a bearing for the spindle below the support plate whereby upon the seat being loaded and the spindle rotated, the plate is engaged with the hearing so that no relative rotation occurs between the spindle and the nut but
  • a rotatable chair including a column having a flared upper end, a threaded spindle mounted within said colurnn and having a portion projecting beyond said upper end, a bell-shaped nut threadedly engaging said projecting portion of said spindle and overlapping said upper end of said column, said projecting portion being adapted to carry a seat, a support plate within said nut which is non-rotatable yet axially movable relative to said nut, a plurality of truncated conical springs arranged within the nut in parallelism with the upper ends of the springs engaging the end of the nut and the lower ends of the springs engaging said support plate, an abutment within the nut and below the support plate for limiting axial movement of the support plate in a direction away from spot the end of the nut, a non-rotatable yet axially movable bearing for said spindle below the support plate, said bearing having a downwardly stepped surface in sliding contact with the flared upper end of the column
  • a rotatable chair including a column having an upper end, a threaded spindle mounted within said column and having a portion projecting beyond said upper end, a bell-shaped nut threadedly engaging said projecting portion of said spindle and overlapping said upper end of said column, said projecting portion being adapted to carry a seat, a support plate mounted within said nut, the inner wall of said nut being provided with a plurality of outwardly bowed recesses, a plurality of truncated conical springs within the nut with each spring being located in an outwardly bowed recess, a plurality of enlargements on said support plate with each enlargement being located in an outwardly bowed recess whereby said support plate is non-rotatable yet axially movable relative to said nut, the upper ends of said springs engaging the end of the nut and the lower ends of the springs engaging said enlargements, an abutment within the nut below the support plate for limiting

Landscapes

  • Chairs Characterized By Structure (AREA)
  • Pivots And Pivotal Connections (AREA)
US369764A 1963-11-02 1964-05-25 Rotatable chair Expired - Lifetime US3218021A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM58769A DE1261291B (de) 1963-11-02 1963-11-02 Drehstuhl

Publications (1)

Publication Number Publication Date
US3218021A true US3218021A (en) 1965-11-16

Family

ID=7309327

Family Applications (1)

Application Number Title Priority Date Filing Date
US369764A Expired - Lifetime US3218021A (en) 1963-11-02 1964-05-25 Rotatable chair

Country Status (9)

Country Link
US (1) US3218021A (de)
BE (1) BE647523A (de)
CH (1) CH417883A (de)
DE (1) DE1261291B (de)
DK (1) DK111387B (de)
FR (1) FR1383647A (de)
GB (1) GB1032600A (de)
LU (1) LU45618A1 (de)
NL (1) NL6402197A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3391893A (en) * 1966-02-14 1968-07-09 Frank Doerner & Sons Ltd Thrust bearing for a swivel chair
US3727871A (en) * 1972-04-14 1973-04-17 H Harper Seat-height adjustment device
US3991965A (en) * 1976-01-27 1976-11-16 Gf Business Equipment, Inc. Chair height adjusting mechanism
US4181280A (en) * 1977-05-18 1980-01-01 Faultless-Doerner Manufacturing Inc. Bell assembly for a chair support
US4394001A (en) * 1981-03-18 1983-07-19 Haworth, Inc. Height-adjusting mechanism for chair seat
US4509382A (en) * 1983-03-25 1985-04-09 General Motors Corporation Preloaded screw actuator
WO1986000974A1 (en) * 1984-07-27 1986-02-13 Haworth, Inc. Mechanical chair-height control mechanism
US5499644A (en) * 1995-05-25 1996-03-19 Tye-Sil Corporation Sunshade assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5451024A (en) * 1994-07-12 1995-09-19 Lai; Yu-Shan Height adjusting mechanism for a swivel chair

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1067961A (en) * 1912-02-29 1913-07-22 William M Bailey Chair.
US1129175A (en) * 1911-04-18 1915-02-23 Peter J Desselle Stool.
US1270729A (en) * 1917-03-13 1918-06-25 Orlan A Harris Stool.
US1880181A (en) * 1930-08-22 1932-09-27 John Y Turner Shock absorbing seat support
US2298230A (en) * 1940-07-10 1942-10-06 Radke Hugo Max Cushioning pedestal
US2590382A (en) * 1949-04-09 1952-03-25 Ludwig P Danielson Stool
US3059888A (en) * 1960-02-26 1962-10-23 Lie Finn Rotary seat construction having novel bearing means therein

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE600417C (de) * 1934-07-23 Fr Drabert Soehne Drehstuhl
DE687506C (de) * 1935-08-26 1940-01-31 Juho Merivaara Selbsttaetige Hoeheneinstellvorrichtung fuer Drehstuehle u. dgl.
GB935968A (en) * 1961-11-10 1963-09-04 Arenson A Ltd Improvements in vertically adjustable chairs

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1129175A (en) * 1911-04-18 1915-02-23 Peter J Desselle Stool.
US1067961A (en) * 1912-02-29 1913-07-22 William M Bailey Chair.
US1270729A (en) * 1917-03-13 1918-06-25 Orlan A Harris Stool.
US1880181A (en) * 1930-08-22 1932-09-27 John Y Turner Shock absorbing seat support
US2298230A (en) * 1940-07-10 1942-10-06 Radke Hugo Max Cushioning pedestal
US2590382A (en) * 1949-04-09 1952-03-25 Ludwig P Danielson Stool
US3059888A (en) * 1960-02-26 1962-10-23 Lie Finn Rotary seat construction having novel bearing means therein

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3391893A (en) * 1966-02-14 1968-07-09 Frank Doerner & Sons Ltd Thrust bearing for a swivel chair
US3727871A (en) * 1972-04-14 1973-04-17 H Harper Seat-height adjustment device
US3991965A (en) * 1976-01-27 1976-11-16 Gf Business Equipment, Inc. Chair height adjusting mechanism
US4181280A (en) * 1977-05-18 1980-01-01 Faultless-Doerner Manufacturing Inc. Bell assembly for a chair support
US4394001A (en) * 1981-03-18 1983-07-19 Haworth, Inc. Height-adjusting mechanism for chair seat
US4509382A (en) * 1983-03-25 1985-04-09 General Motors Corporation Preloaded screw actuator
WO1986000974A1 (en) * 1984-07-27 1986-02-13 Haworth, Inc. Mechanical chair-height control mechanism
US4598892A (en) * 1984-07-27 1986-07-08 Haworth, Inc. Mechanical chair-height control mechanism
US5499644A (en) * 1995-05-25 1996-03-19 Tye-Sil Corporation Sunshade assembly

Also Published As

Publication number Publication date
DE1261291B (de) 1968-02-15
BE647523A (de) 1964-08-31
FR1383647A (fr) 1964-12-24
DK111387B (da) 1968-08-12
GB1032600A (en) 1966-06-15
NL6402197A (de) 1965-05-03
LU45618A1 (de) 1964-05-09
CH417883A (de) 1966-07-31

Similar Documents

Publication Publication Date Title
US3479081A (en) Body mount
US4576357A (en) Leveling element
US3227113A (en) Locking mechanism
US10538923B2 (en) Anti-seismic access floor
US2697578A (en) Vibration mounting
US2956368A (en) Adjustable foot for hospital and restaurant cabinets, tables and like articles of furniture
US2979297A (en) Combined support and shock absorber for piping and the like
US2897520A (en) Resilient support assembly
US2702075A (en) Swivel chair releasable height adjusting means
US3161396A (en) Swivel chair support construction
US3646633A (en) Adjustable swivel glide
US4494721A (en) Seat adjustment mechanism for a chair
US3659814A (en) Load responsive device and method of making
US3606234A (en) Releasable swivel chair support construction
US2514109A (en) Pedestal
US1666392A (en) Seat
US3145669A (en) Locking mechanism
US3506287A (en) Linearly adjustable devices
US2717747A (en) Chock devices for machinery bases
US1894743A (en) Supporting structure
US3090466A (en) Slope support compensators for ladders
US3224032A (en) Caster
US1872894A (en) Chair iron
US2555064A (en) Gyratory crusher
US2382973A (en) Fastener assembly