US3896744A - Height-adjustable desk - Google Patents

Height-adjustable desk Download PDF

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Publication number
US3896744A
US3896744A US368313A US36831373A US3896744A US 3896744 A US3896744 A US 3896744A US 368313 A US368313 A US 368313A US 36831373 A US36831373 A US 36831373A US 3896744 A US3896744 A US 3896744A
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US
United States
Prior art keywords
clamping
tube
desk
tubes
sliding
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Expired - Lifetime
Application number
US368313A
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English (en)
Inventor
Adolf Otto Goebl
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Individual
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Individual
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Publication date
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Publication of US3896744A publication Critical patent/US3896744A/en
Anticipated expiration legal-status Critical
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B41/00—School desks or tables
    • A47B41/02—Adjustable, inclinable, sliding or foldable desks tops
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B9/00—Tables with tops of variable height
    • A47B9/08—Tables with tops of variable height with clamps acting on vertical rods

Definitions

  • ABSTRACT A height-adjusting mechanism for a desk consisting of [52] US. Cl. 108/146, 108/150, 234182721523, 3 pp tube connected to the base of the desk, a [51] Int Cl 2 A47B 9/08 sliding tube telescopically mounted with respect to the [58] Fieid 146 144 support tube and connected to the top of the desk and 5 a lever-activated clamping tube located between the 403/368 6 sliding and support tubes, said clamping tube having a clamping ring that engages and holds the sliding tube lace when the tube is in clamping position and that [56] References Clted m p releases the slldlng tube for ad ustment when moved UNITED STATES PATENTS by the lever to its release position.
  • the present invention provides for such an adjustable desk comprising a base portion and a top portion supporting a desk or table that can be pulled up or pushed down and locked in place with respect to the base portion.
  • a vertical support tube is connected to and extends upwardly from the base portion, and a sliding tube concentrically mounted for telescoping'movement with respect to the support tube is connected to and extends downwardly from the top portion of the desk.
  • a clamping tube is located'between the sliding and support tubes and has limited movement between a release position and a clamping position.
  • Clamping means are mounted on the clamping tube which are pressed into engagement with the sliding tube to hold it in place by friction when the clamping tube is in clamping'position and which are disengaged from the sliding tube when the clamping tube'is moved to the release position to permit the desk top to be raised or lowered.
  • Spring means are further provided for biasing the clamping tube toward clamping position, and lever means are provided for moving the clamping tube against the spring means toward its release position.
  • the lever means are mounted on the base portion to provide a convenient foot-operated mechanism.
  • FIG. 1 is a rear view of a double desk utilizing the height-adjusting mechanism of the present invention
  • FIG. 2 is a side view of the desk shown in FIG. 1;
  • FIG. 3 is an exploded view partially in section showing the height-adjusting mechanism of the present invention.
  • FIG. 4 is a sectional view along the line 44 of FIG. 3.
  • the base portion of the desk comprises a base tube 1 on whose ends are transversely mounted foot tubes 2 and 4 having rubber coasters 7 for supporting the desk in a stable manner.
  • the base tube 1 supports two upright, vertical support tubes 3 into each of which are telescopically mounted vertical sliding tubes 20. Tubes are connected to a transverse member 21 having side parts 22 that support the top of the desk.
  • the desk top may obviously be replaced by a table top or any other form of top without departing from the scope of the present invention.
  • the height-adjusting mechanism of the present invention includes support tube 3 and sliding tube 20 as well as a clamping tube 17 that is located between support tube 3 and sliding tube 20.
  • Tube 17 has limited movement between a clamping position shown in solid in FIG. 3, where sliding tube 20 is gripped in place and a release position shown in phantom in FIG.- 3, where the sliding tube and the attached top portion of thedesk are free'to slide with respect to support tube 3.
  • clamping means are provided for engagingth sliding tube to hold it in placewhen clamping tube 17 is in clamping position.
  • the clamping means comprises an outer clamping ring 14 fixed to the open top of support tube 3 and held in place by screw or pin 16.
  • the inside'of clamping ring 14 has a tapered bore.
  • An inner clamping ring 18 having a complementary taper is also mounted to the upper end of clamping tube 17.
  • spring means are also provided for biasing the clamping tube toward clamping position.
  • this spring means comprises a fixed stop 19 mounted to the periphery of clamping tube '17 and an annular spring 15 mounted between clamping ring l4 and stop 19 on the clamping tube.
  • Spring 15 thus exerts a downward force on clamping tube 17 tending to draw clamping ring 18 into clamping ring 14 and against sliding tube 20.
  • a guide pin 31 between sliding tube 20 and clamping tube 17 as well as the cylindrical inner surface of clamping ring 18 guides the vertical movement of sliding tube 20 and prevents play between the tube and clamping tube 17.
  • a slot or other guide means for receipt of pin 31 may he provided, if desired, in sliding tube 20 to prevent the tube and the desk top from twisting with respect to the base portion.
  • lever means are further provided for moving the clamping tube against spring 15 toward release position to release the grip of clamping ring 18 on sliding tube 20 so that the top portion of the desk can be adjusted to the desired height.
  • this means comprises a lever arm 10 pivotally connected at one end to a foot-operated push-button 12 mounted in a collar 13 in base tube 1 by a pin 9 having a cross arm 9a engaging slot 27 between tips 10a of arm 10 as shown in FIGS. 3 and 4.
  • Lever arm 10 has a flat 26 at the opposite end that extends through an opening 28 in the base of support tube 3 and engages a supporting ring 29 on the bottom of clamping tube 17
  • lever arm 10 pivots about a support pin 1 1 in base tube 1 and moves outwardly at the same time as button 12 is pushed down.
  • button 12 In operation and to change the height of the desk top, button 12 is pushed downwardly, for instance, by the foot to rotate lever arm 10 about pivot or fulcrum 11 and push clamping tube 17 upwardly against spring 15 toward its release position. As clamping tube 17 moves upwardly, clamping ring 18 attached to the top of the tube also moves upwardly out of engagement with fixed clamping ring 14 on tube 3 thereby releasing its grip on sliding tube 20 and permitting it to slide with respect to support tube 3. Then, with the foot still on button 12, the top portion of the desk is raised or lowered the desired height. Following adjustment, pressure on button 12 is released and spring 15 then pushes clamping tube l7 downwardly to bring the tapers of clamping rings 14 and 18 back into engagement with each other and. to push ring 18 against sliding tube 20 and lock the desk at the desired height.
  • any wrenching or twisting of the top portion with respect to the base portion is obviously prevented although a single mechanism for a single desk can also be used.
  • the flat 26 on lever arm preferably extends beyond clamping ring 17 so that it will engage the bottom of sliding tube 20 and thereby limit the lowermost position of the tube.
  • the mechanism of the present invention permits simple and rapid adjustment of a student desk or table without the use of any .tools and in an efficient and trouble-free manner.
  • a height-adjustable desk comprising a base portion and a top portion, a pair of support tubes mounted on the base portion, a sliding tube concentrically mounted for telescoping movement with respect to each of the support tubes and connected to the top portion of the desk, a clamping tube located between said sliding and support tubes and mounted for movement between a clamping position and a release position, clamping means mounted on each of said clamping tubes for gripping the sliding tube to hold it in place when the clamping tube is in clamping position and for releasing the sliding tube when the clamping tube is in release position, spring means for biasing each of the clamping tubes toward clamping position, lever means for moving the clamping tubes toward release position so that the top portion can be adjusted to the desired height, said moving means comprising a pair of lever arms pivotally mounted on the base portion of the desk, each of said arms having a portion disposed to engage the associated clamping tube to push it upwardly and disengage the clamping means.
  • each support tube has an opening adjacent the bottom end thereof and said other end of the associated lever arm extends through said opening into engagement with the clamping tube.

Landscapes

  • Tables And Desks Characterized By Structural Shape (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
US368313A 1972-06-12 1973-06-08 Height-adjustable desk Expired - Lifetime US3896744A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH868972A CH552359A (de) 1972-06-12 1972-06-12 In der hoehe verstellbares pult oder tisch.

Publications (1)

Publication Number Publication Date
US3896744A true US3896744A (en) 1975-07-29

Family

ID=4343575

Family Applications (1)

Application Number Title Priority Date Filing Date
US368313A Expired - Lifetime US3896744A (en) 1972-06-12 1973-06-08 Height-adjustable desk

Country Status (8)

Country Link
US (1) US3896744A (xx)
AT (1) AT322146B (xx)
CH (1) CH552359A (xx)
CS (1) CS170107B2 (xx)
DE (1) DE2324432A1 (xx)
FR (1) FR2188423A5 (xx)
IT (1) IT989046B (xx)
NL (1) NL7308072A (xx)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4130069A (en) * 1976-11-24 1978-12-19 American Hospital Supply Corporation Vertically-adjustable two-post drafting table
US4164288A (en) * 1977-06-17 1979-08-14 Hiroshi Okazaki Coat hanger stand
US4541343A (en) * 1982-10-22 1985-09-17 Henri Erard Adjustable television/video recorder stand incorporating a cassette-holder
US4667605A (en) * 1986-09-22 1987-05-26 Hamilton Industries, Inc. Adjustable table leg assembly
US5495811A (en) * 1994-04-05 1996-03-05 Ergoflex Systems Height adjustable table
US5682825A (en) * 1994-03-01 1997-11-04 Robert Krause Gmbh & Co. Kg Zweignniederlassung Weilheim/Teck Height-adjustable work table
US6595144B1 (en) 2000-05-17 2003-07-22 Suspa Incorporated Adjustable leg assembly
US20040010328A1 (en) * 2002-06-10 2004-01-15 Carson Barry R. Method and system for controlling ergonomic settings at a worksite
US20070235398A1 (en) * 2006-03-31 2007-10-11 Perdue Holdings, Inc. Rack for storing and freezing processed food product
US7878476B2 (en) 2005-03-29 2011-02-01 Xybix Systems, Inc. Apparatus for mounting a plurality of monitors having adjustable distance to a viewer
WO2012015821A1 (en) * 2010-07-30 2012-02-02 Ergotron, Inc. Cam balance mechanism systems and methods
US8596599B1 (en) 2005-03-29 2013-12-03 Xybix Systems Incorporated Apparatus for mounting a plurality of monitors having adjustable distance to a viewer
US8826831B2 (en) 2010-07-30 2014-09-09 Ergotron, Inc. Display positioning apparatus and method
US9080721B2 (en) 2010-05-27 2015-07-14 Ergotron, Inc. Display positioning apparatus and method
US20160356418A1 (en) * 2015-06-03 2016-12-08 Labflex A/S Mounting device for installation against a substantially horizontal surface and use thereof
US9775431B2 (en) 2012-02-08 2017-10-03 Humanscale Corporation Accessory cart
US10124203B1 (en) 2016-01-21 2018-11-13 Geoffrey B. Brookshire Student desk for brain based movement
US10751239B2 (en) 2015-11-13 2020-08-25 Humanscale Corporation Medical technology station and method of use
US11284713B2 (en) 2010-07-30 2022-03-29 Ergotron, Inc. Display positioning apparatus and method
US12022941B2 (en) 2010-07-30 2024-07-02 Ergotron, Inc. Display positioning apparatus and method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US376016A (en) * 1888-01-03 Dental chair
US1075323A (en) * 1912-05-24 1913-10-14 Israel Benjamins Adjustable stand.
US1103839A (en) * 1913-11-18 1914-07-14 George E Rellay Raising and lowering mechanism.
US1238423A (en) * 1916-04-28 1917-08-28 Arthur Matthey Dressmaker's adjustable dummy-support.
US2703691A (en) * 1954-06-15 1955-03-08 Luther W Minnis Camera support
US2726126A (en) * 1952-01-24 1955-12-06 American Seating Co Vertically adjustable table
US3741514A (en) * 1972-04-17 1973-06-26 G Snurr Quick adjustable height support

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US376016A (en) * 1888-01-03 Dental chair
US1075323A (en) * 1912-05-24 1913-10-14 Israel Benjamins Adjustable stand.
US1103839A (en) * 1913-11-18 1914-07-14 George E Rellay Raising and lowering mechanism.
US1238423A (en) * 1916-04-28 1917-08-28 Arthur Matthey Dressmaker's adjustable dummy-support.
US2726126A (en) * 1952-01-24 1955-12-06 American Seating Co Vertically adjustable table
US2703691A (en) * 1954-06-15 1955-03-08 Luther W Minnis Camera support
US3741514A (en) * 1972-04-17 1973-06-26 G Snurr Quick adjustable height support

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4130069A (en) * 1976-11-24 1978-12-19 American Hospital Supply Corporation Vertically-adjustable two-post drafting table
US4164288A (en) * 1977-06-17 1979-08-14 Hiroshi Okazaki Coat hanger stand
US4541343A (en) * 1982-10-22 1985-09-17 Henri Erard Adjustable television/video recorder stand incorporating a cassette-holder
US4667605A (en) * 1986-09-22 1987-05-26 Hamilton Industries, Inc. Adjustable table leg assembly
US5682825A (en) * 1994-03-01 1997-11-04 Robert Krause Gmbh & Co. Kg Zweignniederlassung Weilheim/Teck Height-adjustable work table
US5495811A (en) * 1994-04-05 1996-03-05 Ergoflex Systems Height adjustable table
US6595144B1 (en) 2000-05-17 2003-07-22 Suspa Incorporated Adjustable leg assembly
US20040010328A1 (en) * 2002-06-10 2004-01-15 Carson Barry R. Method and system for controlling ergonomic settings at a worksite
US8596599B1 (en) 2005-03-29 2013-12-03 Xybix Systems Incorporated Apparatus for mounting a plurality of monitors having adjustable distance to a viewer
US7878476B2 (en) 2005-03-29 2011-02-01 Xybix Systems, Inc. Apparatus for mounting a plurality of monitors having adjustable distance to a viewer
US20070235398A1 (en) * 2006-03-31 2007-10-11 Perdue Holdings, Inc. Rack for storing and freezing processed food product
US9080721B2 (en) 2010-05-27 2015-07-14 Ergotron, Inc. Display positioning apparatus and method
US9188275B2 (en) 2010-07-30 2015-11-17 Ergotron, Inc. Edge mount positioning apparatus, system, and method
US10667602B2 (en) 2010-07-30 2020-06-02 Ergotron, Inc. Display positioning apparatus and method
US8839723B2 (en) 2010-07-30 2014-09-23 Ergotron, Inc. Display positioning apparatus and method
AU2011282862B2 (en) * 2010-07-30 2014-10-09 Ergotron, Inc. Cam balance mechanism systems and methods
US8967560B2 (en) 2010-07-30 2015-03-03 Ergotron, Inc. Cam balance mechanism systems and methods
CN103080626A (zh) * 2010-07-30 2013-05-01 爱格升公司 凸轮平衡机构系统与方法
WO2012015821A1 (en) * 2010-07-30 2012-02-02 Ergotron, Inc. Cam balance mechanism systems and methods
CN103080626B (zh) * 2010-07-30 2016-07-06 爱格升公司 升降机构、包括其的显示器定位设备、书桌及显示器定位方法
US9470357B2 (en) 2010-07-30 2016-10-18 Ergotron, Inc. Display positioning apparatus and method
US12022941B2 (en) 2010-07-30 2024-07-02 Ergotron, Inc. Display positioning apparatus and method
US9581285B2 (en) 2010-07-30 2017-02-28 Ergotron, Inc. Cam balance mechanism systems and methods
US9717329B2 (en) 2010-07-30 2017-08-01 Ergotron, Inc. Display positioning apparatus and method
US9743757B2 (en) 2010-07-30 2017-08-29 Ergotron, Inc. Edge mount positioning apparatus, system, and method
US11672334B2 (en) 2010-07-30 2023-06-13 Ergotron, Inc. Display positioning apparatus and method
US9820566B2 (en) 2010-07-30 2017-11-21 Ergotron, Inc. Display positioning apparatus and method
US11284713B2 (en) 2010-07-30 2022-03-29 Ergotron, Inc. Display positioning apparatus and method
US10939753B2 (en) 2010-07-30 2021-03-09 Ergotron, Inc. Display positioning apparatus and method
US8826831B2 (en) 2010-07-30 2014-09-09 Ergotron, Inc. Display positioning apparatus and method
US10172450B2 (en) 2010-07-30 2019-01-08 Ergotron, Inc. Display positioning apparatus and method
US10104957B2 (en) 2010-11-11 2018-10-23 Ergotron, Inc. Display and keyboard positioning apparatus, system, and method
US10159337B2 (en) 2012-02-08 2018-12-25 Humanscale Corporation Accessory cart
US9775431B2 (en) 2012-02-08 2017-10-03 Humanscale Corporation Accessory cart
US20160356418A1 (en) * 2015-06-03 2016-12-08 Labflex A/S Mounting device for installation against a substantially horizontal surface and use thereof
US10751239B2 (en) 2015-11-13 2020-08-25 Humanscale Corporation Medical technology station and method of use
US12102569B2 (en) 2015-11-13 2024-10-01 Capsa Solutions Llc Medical technology station and method of use
US10124203B1 (en) 2016-01-21 2018-11-13 Geoffrey B. Brookshire Student desk for brain based movement

Also Published As

Publication number Publication date
CS170107B2 (xx) 1976-08-27
FR2188423A5 (xx) 1974-01-18
AT322146B (de) 1975-05-12
DE2324432A1 (de) 1974-01-03
IT989046B (it) 1975-05-20
NL7308072A (xx) 1973-12-14
CH552359A (de) 1974-08-15

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