US3815956A - Rotary armchair - Google Patents

Rotary armchair Download PDF

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Publication number
US3815956A
US3815956A US00320495A US32049573A US3815956A US 3815956 A US3815956 A US 3815956A US 00320495 A US00320495 A US 00320495A US 32049573 A US32049573 A US 32049573A US 3815956 A US3815956 A US 3815956A
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US
United States
Prior art keywords
seat
armchair
rotary
conical
base
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
US00320495A
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English (en)
Inventor
K Bocksch
W Hensel
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
Original Assignee
Mauser KG
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Publication date
Application filed by Mauser KG filed Critical Mauser KG
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Publication of US3815956A publication Critical patent/US3815956A/en
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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
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/54—Supports for the arms
    • A47C7/546—Supports for the arms of detachable type
    • 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

Definitions

  • a base carries an upright telescopic spring-loaded column the lower end of which is removably received in a conical seat of the base, and the upper end of which is also provided with a conical seat.
  • a discrete armrest unit has two symmetrically shaped tubular elements, the outer ends of which are connected by respective armrests, and the center of which is bridged by a connecting plate having a conical opening into which the conical seat at the upper end of the column is insertable so that a portion of the conical seat extends upwardly out of the plate.
  • a seat unit including a seat and the backrest extending upwardly from the seat, is provided at the underside of the seat with a socket into a conical recess of which the upwardly extending part of the conical seat of the upper end of the telescopic column is insertable.
  • the present invention relates generally to a rotary armchair, and more particularly to a spring-loaded rotary armchair, and still more particularly to a springloaded rotary armchair which isadjustable in its height.
  • Spring-loaded chairs which can be rotated and which may or not be adjustable in the heightof their seat, are already quite well known. As a rule they are usedas office furniture. There are two basic types of such chairs, namely those having armrests and those which are not provided with armrests. If thechair is of the type having an armrest then it is well known to connect the armrests via their carriers to the. underside of the chair seat, either by screwing them to the chair seat or by welding them to it. Of course, this requires additional operating steps in assembling the chair and increases not only the manufacturing. cost but also the manufacturing time and, in consequence, the selling expense of such chairs.
  • Another object of the invention is to provide such a rotary armchair which makes it possible for a user to convert the chair readily, without the use of tools and in a brief span of time from a chair having arms to a chair without arms, or vice versa.
  • An additional object of the invention is to provide such a rotary armchair in which all components can readily be disassembled for storage and, in particular, for packing and distribution purposes. This, however, is a requirement which must harmonize with the aboveindicated requirement that the components of the armchair should be capable of being assembled and disassembled by a user without the need for tools and special connecting means.
  • a rotary armchair which, briefly stated, comprises a base, and a spring-loaded telescopic column connected with and extending upwardly from the base.
  • the column includes an outer tube having a lower end which is secured to the base and also having an upper end.
  • a turnable inner tube extends through the upper end and is provided with a conical free end portion having a lower and an upper section.
  • a discrete armrest unit comprises two mirror-symmetrical shaped tubular elements having respective farther-spaced outer ends bridged by armrests, and closer-spaced center portions bridged by a connecting plate which is provided with a conical opening arranged to receive the lower section so as to releasably connect the unit with the column.
  • a seat unit includes a seat, backrest extending upwardly from the seat, a socket at the underside of the seat and having a conical recess arranged to receive the upper section of the free end portion of the inner tube, so as to releasably connect the seat unit with. the column. Further, the seat unit includes a projection which engages one of the tubular elements to thereby prevent relative angular displacement of the armrest unit and seat unit.
  • the armrest unit is provided as a discrete unit it can be installed or removed in toto when the chair is to be converted to an armchair, or when it is to be converted to a chair having no arms. Because the armrest unit is so constructed that the tubular elements are symmetrical it is clear that the armrest unit will always have the proper orientation with respect to the seat, irrespective of how it is connected with the telescopical column.
  • the base with conical recess having an upright orientation, and to provide the lower end of the outer tube of the telescopic column with a conical portion which can be received in this recess.
  • the column can also be readily connected with and disconnected from the base without requiring tools for any particular expertise.
  • FIG. I is a side view illustrating the base of the novel DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • FIGS. 1-5 each illustrating a portion of the armchair
  • FIG. 6 illustrating a top-plan detail view of the portion shown in FIG. 5
  • FIG. 7 showing a fragmentary detail view of the portion in FIGS. and 6.
  • the telescopic column is composed of an outer tube 2 and an inner tube'3 which extends upwardly through the upper open end of the outer tube 2.
  • the column is spring-loaded, which can be achieved in a manner well known from the art and therefore requiring no further discussion, by inserting a so-called gas spring into the interior of the column.
  • An operating pin 6 is provided, which when depressed opens a valve provided in the piston of the gas spring and unblocks the piston of the latter so that the piston can move.
  • the gas spring resembles a shock absorber in its construction and operation.
  • the inner tube 3 When there is no weight on the telescopic column, the inner tube 3 will slide upwardly upon depressing of the pin 6 until the latter is disengaged, causing the valve in the piston of the gas spring to close and thus to block the further movement of the piston. If the telescopic column is subjected to a load, the inner tube 3 slides into the outer tube 2 until the valve again is closed.
  • the outer tube 2 of the telescopical column is provided with a cone 5 which can be inserted into a corresponding bore located centrally in the cruciform base 1.
  • the outer ends of the projections of the base are provided with adjustable casters 21, advantageously dual characters.
  • the upper free end portion of the outer tube 3 is also provided with a cone, identified with reference numeral 4.
  • the discrete armrest unit which forms a part of the rotary armchair according to the present invention is designated with reference numeral 13 and has to symmetrical shaped tubular elements 17 and 18.
  • the outer free ends of the elements 17 and 18 are, as seen in FIG. 7, received in passages provided at the opposite ends of armrests 14 in which they are received under pre-stress. In these passages they are retained against displacement by pins 20.
  • Reference numeral 19 designates padding or upolstery on the armrests I4.
  • the tubular elements 17 and 18 are closest together and are there bridged by a sheet-material (preferably sheet metal) plate 15 which is welded to them.
  • a conical opening 16 which can receive the lower section of the conical free end portion 4 at the upper end of the outer tube 3 of the telescopical column. The upper section of the free end portion 4 will then project upwardly beyond the plate 15.
  • the seat unit is secured to the column.
  • the seat 7 is provided at its underside with a socket 7a having a conical recess arranged to mate with the upper section of the conical free end portion 4.
  • the seat 7 is then connected with this upper section, that is the section which projects upwardly beyond the plate 15.
  • the seat is provided with a laterally projecting extension or tongue 23 which, when the seat 7 is connected with the column in the manner just described, will engage one of the tubular elements 17 and 18 so as to prevent any undesired changes in the angular orientation of the seat unit and armrest unit with reference to one another.
  • an operating button 8 by means of which a user can operate the pin 6 which in turn actuates the valve of the gas spring; reference numeral 22 similarly diagrammatically identifies an operating button for a further gas spring permitting an adjustment in the inclination of the seat back or backrest 12.
  • transmission members connecting the buttons 8 and 22 with the pin 6 and a corresponding pin for the second gas spring, and these transmission members also do not form a part of the present invention but should be understood to be located in the interior of the seat 7.
  • the backrest 12 has a carrier 11 which is insertable into a recess between the clamping device 9 composed of two shell sections which can be so drawn together via an adjusting screw 10 as to retain the carrier 11. The latter can thus be fixed in the clamping device 9 at any desired level.
  • the device 9 is eccentrically mounted on the seat 7 and its position and thereby the inclination of the backrest 12 can be changed by operating the gas spring mentioned above which is not illustrated but which will be actuated by depressing the button 22.
  • a rotary armchair such as illustrated in FIGS. 1-7 can be readily manufactured but requires no assembly of its constituent components to one another, namely of the column to the base, of the armrest unit to the column, or of the seat unit to the column.
  • These various components can all be supplied in unassembled condition to a user. This not only cuts down on the assembly operations at the manufacturer, and thereby reduces the manufacturing expense, but also permits a simpler packing of the components for shipment, and a manner of packing which requires less shipping space.
  • the assembly of the various components by the user is so simple and requires no tools or expertise at all, that it is possible without any difficulty to expect a user to assemble the components himself.
  • a rotary armchair comprising a base; a springloaded telescopable column connected with and extending upwardly from said base, said column including an outer tube having a lower end secured to said base and an upper end, and a turnable inner tube extending through said upper end and provided with a conical free end portion having a lower and an upper section; a discrete armrest unit comprising two symmetrical shaped tubular elements having respective fartherspaced outer ends bridged by armrests, and closerspaced center portions bridged by a connecting plate which is provided with a conical opening arranged to receive said lower section so as to releasably connect said unit with said column; and a seat unit including a seat, a backrest extending upwardly from said seat, a socket at the underside of said seat and having a conical recess arranged to receive said upper section so as to releasably connect said seat unit with said column, and a projection on said seat and engaging one of said tubular elements to thereby prevent relative angular displacement of said units
  • a rotary armchair as defined in claim 1 said armrests being elongated and having spaced ends provided with inwardly extending passages, the respectively as sociated outer ends of said tubular elements each being received in stressed condition in one of said passages; and pin means securing the respective outer ends in the associated passages.
  • a rotary armchair as defined in claim 1 said base having a conical bore; and wherein said lower end of said outer tube is conically configurated and releasably received in said conical bore.

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  • Chairs Characterized By Structure (AREA)
US00320495A 1972-01-03 1973-01-02 Rotary armchair Expired - Lifetime US3815956A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2200106 1972-01-03

Publications (1)

Publication Number Publication Date
US3815956A true US3815956A (en) 1974-06-11

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ID=5832240

Family Applications (1)

Application Number Title Priority Date Filing Date
US00320495A Expired - Lifetime US3815956A (en) 1972-01-03 1973-01-02 Rotary armchair

Country Status (8)

Country Link
US (1) US3815956A (OSRAM)
JP (1) JPS4877952A (OSRAM)
BE (1) BE792744A (OSRAM)
BR (1) BR7300054D0 (OSRAM)
FR (1) FR2250274A5 (OSRAM)
GB (1) GB1371011A (OSRAM)
IT (1) IT971997B (OSRAM)
NL (1) NL7217473A (OSRAM)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3947068A (en) * 1974-04-22 1976-03-30 Steelcase Inc. Chair
US4370001A (en) * 1980-07-01 1983-01-25 Oernberg Stellan Basic frame for an adjustable damper-actuated chair
WO2016094967A1 (en) * 2014-12-19 2016-06-23 Ramler R&D Pty Ltd A chair
US10021984B2 (en) 2015-04-13 2018-07-17 Steelcase Inc. Seating arrangement
US10194750B2 (en) 2015-04-13 2019-02-05 Steelcase Inc. Seating arrangement
US10966527B2 (en) 2017-06-09 2021-04-06 Steelcase Inc. Seating arrangement and method of construction
EP3822115A3 (en) * 2019-11-13 2021-07-07 Autochair Limited Seat assembly
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2299752A (en) * 1995-04-13 1996-10-16 Francis Flanagan Demountable armrest assembly for vehicle seat

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1346386A (en) * 1919-09-29 1920-07-13 Smolar Frank Pedestal car-seat
US1977702A (en) * 1932-11-14 1934-10-23 Burroughs Adding Machine Co Chair
US2328243A (en) * 1941-04-28 1943-08-31 Posture Res Corp Chair
US2711211A (en) * 1952-04-16 1955-06-21 Tan Sad Chair Co 1931 Ltd Resiliently mounted back rest
US2966208A (en) * 1958-03-21 1960-12-27 Harter Corp Chair
US3223450A (en) * 1964-11-23 1965-12-14 Charles R Pollock Upholstered furniture

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1346386A (en) * 1919-09-29 1920-07-13 Smolar Frank Pedestal car-seat
US1977702A (en) * 1932-11-14 1934-10-23 Burroughs Adding Machine Co Chair
US2328243A (en) * 1941-04-28 1943-08-31 Posture Res Corp Chair
US2711211A (en) * 1952-04-16 1955-06-21 Tan Sad Chair Co 1931 Ltd Resiliently mounted back rest
US2966208A (en) * 1958-03-21 1960-12-27 Harter Corp Chair
US3223450A (en) * 1964-11-23 1965-12-14 Charles R Pollock Upholstered furniture

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3947068A (en) * 1974-04-22 1976-03-30 Steelcase Inc. Chair
US4370001A (en) * 1980-07-01 1983-01-25 Oernberg Stellan Basic frame for an adjustable damper-actuated chair
WO2016094967A1 (en) * 2014-12-19 2016-06-23 Ramler R&D Pty Ltd A chair
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
US10194750B2 (en) 2015-04-13 2019-02-05 Steelcase Inc. Seating arrangement
US10575648B2 (en) 2015-04-13 2020-03-03 Steelcase Inc. Seating arrangement
US11096497B2 (en) 2015-04-13 2021-08-24 Steelcase Inc. Seating arrangement
US10021984B2 (en) 2015-04-13 2018-07-17 Steelcase Inc. Seating arrangement
US11324325B2 (en) 2015-04-13 2022-05-10 Steelcase Inc. Seating arrangement
US11553797B2 (en) 2015-04-13 2023-01-17 Steelcase Inc. Seating arrangement
US11963621B2 (en) 2015-04-13 2024-04-23 Steelcase Inc. Seating arrangement
US10966527B2 (en) 2017-06-09 2021-04-06 Steelcase Inc. Seating arrangement and method of construction
US11825955B2 (en) 2017-06-09 2023-11-28 Steelcase Inc. Seating arrangement and method of construction
EP3822115A3 (en) * 2019-11-13 2021-07-07 Autochair Limited Seat assembly
US11285060B2 (en) 2019-11-13 2022-03-29 Autochair Limited Seat assembly

Also Published As

Publication number Publication date
GB1371011A (en) 1974-10-23
FR2250274A5 (OSRAM) 1975-05-30
BE792744A (fr) 1973-03-30
BR7300054D0 (pt) 1973-10-09
JPS4877952A (OSRAM) 1973-10-19
NL7217473A (OSRAM) 1973-07-05
IT971997B (it) 1974-05-10

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