US3799485A - Height adjusting mechanism - Google Patents

Height adjusting mechanism Download PDF

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Publication number
US3799485A
US3799485A US00285188A US28518872A US3799485A US 3799485 A US3799485 A US 3799485A US 00285188 A US00285188 A US 00285188A US 28518872 A US28518872 A US 28518872A US 3799485 A US3799485 A US 3799485A
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United States
Prior art keywords
spindle
nut
respect
detent
washer
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
US00285188A
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English (en)
Inventor
R Wolters
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.)
Steelcase Inc
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Steelcase Inc
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 Steelcase Inc filed Critical Steelcase Inc
Priority to US00285188A priority Critical patent/US3799485A/en
Priority to US00285527A priority patent/US3799486A/en
Priority to CA167,043A priority patent/CA986002A/en
Priority to CA176,513A priority patent/CA1004126A/en
Priority to DE19732343328 priority patent/DE2343328A1/de
Priority to JP48096246A priority patent/JPS4970757A/ja
Priority to GB4104373A priority patent/GB1401937A/en
Application granted granted Critical
Publication of US3799485A publication Critical patent/US3799485A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/24—Chairs or stools with vertically-adjustable seats with vertical spindle
    • 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

Definitions

  • the height-adjusting mechanism includes a threaded spindle rotatably mounted in a chair base, a nut threaded on the spindle and a seat-supporting column telescopically mounted in the base and carried on a detent washer which in turn rests on top of the nut.
  • a pin projecting from the nut and through elongated vertical slots at the base of the column allows vertical movement of the column with respect to the nut, but fixes the column against rotatable motion withrespect to the nut.
  • the detent washer includes a key projecting into a slot in the spindle and includes downwardly projecting detents engaging depressions in the top of the nut and normally preventing rotation of the washer and spindle with respect to the nut.
  • a locking button at the base of the spindle can be depressed upwardly to hold the spindle against rotation such that when the chair is rotated, the column and the nut will rotate with respect to the detent washer and with respect to the threaded spindle and will thereby adjust upwardly or downwardly.
  • FIG. 0 FIG. I l
  • the present invention relates to height-adjusting mechanisms for chairs. Normally, a bell nut is rotatably mounted on the chair base and a threaded spindle is threaded in the nut. The chair is mounted at the top of the spindle. Normally, the spindle and bell nut rotate together, generally because of some type of biased detent means therebetween. The height of the chair is adjusted by holding the bell nut and turning the chair to thereby thread the spindle upwardly or downwardly.
  • One drawback to such a mechanism is that the spindle is exposed, at least above the bell nut. The spindle is unsightly and any grease or lubrication thereon becomes exposed to dust.
  • Patent application Ser. No. 68,178 filed Aug. 31, 1970, by Bernard J. Fries and assigned to the assignee ofthe present application discloses a telescoping chair base in which the threads of the spindle are continually hidden from view by a cover tube which is slidably interconnected to the nut within which the threaded spindle is threaded. One adjusts the height by grasping the cover tube and then rotating the chair. While this mechanism is extremely desirable, it is not optimumly acceptable in all applications.
  • One prior art mechanism employs a spindle rotatably mounted in the chair base, the chair itself being mounted on a column which is in turn threaded onto the spindle.
  • the bottom of the sheet metal tubular column is actually formed into the shape of a nut having downwardly deviating detents.
  • These detents normally engage indentations in the threads of the spindle such that the column and spindle tend to rotate in unison.
  • the spindle is locked against rotation with respect to the base by means ofa push plate at the bottom of the base, the detents turn out of the indentations in the spindle threads and the column threads on the spindle.
  • a detent means slidably engages a threaded spindle rotatably mounted in the chair base, the detent means being fixed against rotation with respect to the spindle.
  • This detent means engages a nut which is threadably mounted on the spindle and normally holds the nut against rotation with respect to the spindle.
  • the chair-supporting column is operably connected to the nut such that when the chair and column rotate, the nut, detent means, and spindle also rotate,
  • the detent means comprises a washer having at least one downwardly protruding detent engaging a receiving depression in the top of the nut.
  • the column itself is rotatably mounted directly on the washer, and is vertically slidably connected to the nut, but is fixed against rotation with respect thereto. In this manner, when the rotated column turns the nut and forces the detents up out of the depressions in the top surface of the nut, the column is free to slide upwardly with respect to the nut, but continues to be fixed against rotation with respect thereto.
  • FIG. 1 is a generally cross sectional view of a chair base embodying the height-adjusting mechanism of the invention
  • FIG. 2 is a cross-sectional view of the same chair base wherein the chair has been adjusted upwardly;
  • FIG. 3 is a bottom plan view of the detent washer which rests on top of the adjusting nut and upon which the chair-supporting column rests;
  • FIG. 4 is a generally elevated perspective view of the height-adjusting nut
  • FIG. 5 is a side elevational view of the spindle
  • FIG. 6 is a generally perspective view of the cylindri cal sleeve of the chair-supporting column
  • FIG. 7 is a generally perspective view of the collar which is secured to the inside of the sleeve of the chairsupporting column;
  • FIG. 8 is a perspective view of the locking button which is used to lock the spindle against rotation with respect to the base;
  • FIG. 9 is a generally perspective, cut-away view of the mechanism at the base of the chair-supporting column
  • FIG. 10 is a cross-sectional view showing the spindle locking means at the base of the chair base.
  • FIG. 11 is the same view as FIG. 10, with the chairsupporting column having been adjusted downwardly to its lowermost point.
  • spindle 10 is rotatably mounted in chair base 20 (FIG. 1).
  • Nut 30 is threadably mounted on spindle 10.
  • Chair-supporting column 40 is telescopically received within base 20 and rests on a detent washer 50 which in turn rests on nut 30.
  • Column 40 is operably connected to nut 30, being movable vertically with respect thereto, but being fixed against rotation with respect thereto.
  • Detent washer 50 is operably connected to spindle 10, being vertically slidable with respect thereto, but being fixed against rotation with respect thereto.
  • Spindle lock 60 at the bottom of base 20 can be used to lock spindle 10 against rotation with respect to base 20 whereby rotation of chairsupport column 40 will cause nut 30 to rotatably disengage detent washer 50 and thread on spindle 10 either upwardly or downwardly (compare FIGS. 1 and 2).
  • Spindle 10 comprises a steel shaft or the like having threads 11 thereon (FIGS. and 9).
  • An annular shoulder plate 13 is secured to spindle near the base thereof. Shoulder l3 and a stem 14 projecting downwardly from annular shoulder 13 facilitate rotatable mounting of spindle 10 within base 20.
  • Annular shoulder plate 13 includes a plurality of slots or notches 16 about its perimeter which facilitate the cooperation of shoulder plate 13 with spindle lock 60 to hold spindle 10 against rotation with respect to base 20 (FIGS. 10 and l 1
  • Spindle 10 includes a groove 12 extending vertically therein from generally its top to its bottom (FIG. 5) for cooperating with detent washer 50 to facilitate the slidable but nonrotatable mounting to spindle 10. Groove 12 is deeper than threads 11 such that a key tab received in groove 12 cannot slip-out between threads 11.
  • Base 20 includes a hub 21 with outwardly radiating legs 22 (FIG. 1).
  • Hub 21 is generally cylindrical, being hollowed out in the center from its top almost to its bottom for receiving spindle 10 and chair-supporting column 40.
  • the bottom wall 23 of of hub 21 includes an opening 25 therein through which stem 14 of spindle 10 passes.
  • a pair of spindle bearing washers 24 are positioned between bottom wall 23 and shoulder plate 13 to provide a ratatable bearing means at the base of spindle 10.
  • a pair of openings 26 positioned on opposite sides of bottom wall 23 facilitate cooperation of spindle lock 60 with spindle 10 (FIGS. 10 and 11).
  • Stem 14 of spindle 10 passes through bottom wall 23 and into a downwardly opening cavity 17 in the bottom of base 20.
  • Spindle lock 60 is located generally within cavity 17.
  • a snap ring slips into a receiving groove at the base of stem 14 to lock spindle 10 in place.
  • bearing sleeve 27 is inserted in hub 21 in snugly fitting relationship thereto.
  • Bearing sleeve 27 is a selflubricating bearing sleeve made of nylon or the like which extends generally the length of hub 21.
  • Nut 30, which is threadably mounted on threads 11 of spindle 10 includes depressions 31 in the top surface thereof for cooperating with detent washer 50 (FIG. 4).
  • each side of nut 30 there is a pin hole 32 for receiving a pin 33 (FIGS. 4 and 1).
  • Pins 33 facilitate operable connection of nut 30 to chair-supporting column 40 whereby column 40 is free to move vertically with respect to nut 30, but is fixed against rotation with respect thereto.
  • Each pin 33 comprises a swage pin, a screw or other similar fastener.
  • Column 40 comprises a metal sleeve 41 rigidly joined to a collar 42 at the bottom thereof by means of weld ing or the like (FIGS. 1, 6, and 7). It is telescopically received within bearing sleeve 27 and hub 21. Collar 42 includes a central opening 43 therein through which spindle 10 passes. Sleeve 41 and collar 42 include matching apertures 44 and 45 respectively in the side walls thereof. Apertures 44 and 45 are either elongated in a generally vertical direction (as shown) or are oversized round holes which give the same degree of vertical play for pins 33 as would an elongated slot. They are positioned on opposite sides of column 40 in alignment with pin holes 32 in nut 30. It is through mating apertures 44 and 45 that each pin 33 passes (FIG. 1). In this manner, column 40 is locked against rotation with respect to nut 30, but is free to slide vertically a short distance with respect thereto due to the fact that the apertures have a greater diameter at least in a vertical direction than do pins 33.
  • a chair support 48 which may be of any conventional construction. It is secured to the top of column 40 by means of welding, bolting, or the like.
  • detent washer 50 Collar 42 of column 40 rests directly atop detent washer 50 (FIG. 1).
  • Detent washer 50 in turn rests atop nut 30.
  • detent washer 50 is made of metal, but it could be made of a self-lubricating material such as nylon or the like. It includes a key 51 projecting inwardly towards the center thereof for mating engagement with groove 12 of spindle 10 (FIGS. 3 and 9). This fixes detent washer 50 against rotation with respect to spindle 10.
  • detent washer 50 Projecting downwardly from the bottom surface of detent washer 50 are a plurality of detents 52, one for each depression 31 in the top surface of nut 30 (FIGS. 3 and 9). Detents 52 are received within depressions 31 and normally prevent nut 30 from rotating with respect to washer 50 and spindle 10.
  • Spindle lock 60 for locking spindle 10 against movement with respect to base 20 includes a button 61 formed of sheet metal or the like (FIG. 8).
  • Button 61 includes a pair of upwardly projecting detent fingers 62 (FIGS. 1, 8, l0, and 11). By pushing button 61 upwardly, one can move the upper portion of each detent finger 62 into slot 16 in shoulder plate 13 of spindle 10 (FIG. 10).
  • Each detent finger 62 is wider at its bottom portion than at its top portion and juts inwardly at the base of its top portion to define a limit shoulder 63. Only the upper portion of detent finger 62 is sufficiently narrow to pass through a slot 16, and accordingly, limit shoulder 63 engages the bottom of shoulder plate 13 to prevent further upward movement of button 61.
  • a guide pin 68 projects upwardly from button 61 and is slidably received in a guide tunnel 69 in stem 14 of spindle 10. The cooperation of guide pin 68 and guide tunnel 69 serves to guide button 61 as it is pushed in or out, thereby minimizing jamming.
  • each detent finger 62 is cut off at an angle on one side to define a sloping wedge 64.
  • the bottom of column 40 acts as an abutment means and is aligned with the top of finger 62.
  • its bottom surface abuts the very top of each detent finger 62 and forces detent finger 62 downwardly until wedge 64 is aligned with the edge of receiving slot 16 (FIG. 11).
  • further rotation of a chair and of column 40 causes the edge of receiving slot 16 to engage wedge 64 and, acting as a cam, actually forces button 61 downwardly against the pressure of a person who is depressing button 61 upwardly.
  • detent fingers 62 are forced out of engagement with slots 16 and further downward adjustment of column 40 is prevented. This feature prevents a person from carelessly adjusting column 40 downwardly to the point where it jams against shoulder plate 13 and possibly causes damage to the mechanism.
  • a small retainer ring 66 is force fitted or otherwise secured to the very bottom of base at the edge of cavity 17. Its inside diameter is less than the outside diameter of button 61 so that button 61 is prevented from falling out of the bottom of base 20.
  • Assembly is effected by threading nut 30 onto spindle 10 from the top.
  • Detent washer S0 is then slipped onto spindle 10 with key 51 in groove 12.
  • Spindle 10 is then inserted upwardly through opening 43 in collar 42 of column 40.
  • the apertures 44 and 45 in the base of column 40 are aligned with pin holes 32 in nut 30.
  • Pins 33 are then inserted through apertures 44 and 45 into pin holes 32 and are secured either by a forced fit or, in the case of screws, by threading.
  • washer 18 is secured to the top of spindle 10 by screw 19 in order to prevent the accidental removal of column 40 from spindle 10.
  • Spindle lock 60 is assembled to base 20 by positioning spring 65 within locking button 61 and inserting fingers 62 upwardly through opening 26 in bottom wall 23 of hub 21. Retainer ring 66 is then secured to the bottom edge of cavity 17 to hold locking button 61 in place.
  • FIG. 1 shows the mechanism in its lowermost position and FIG. 2 shows the mechanism in its uppermost position.
  • column 40 can always be adjusted upwardly from its lowermost position since at least the tips of detent fingers 62 can be inserted into notches 16 even with column 40 in its lowermost position and since fingers 62 act as a positive stop against shoulder plate 13 when the chair is rotated in a raising direction.
  • a height-adjusting mechanism for a chair or the like comprising:
  • chair-supporting means operably connected to said nut and being fixed against rotation with respect thereto; detent means slidably mounted on said spindle and fixed against rotation with respect thereto, said detent means engaging said nut for normally holding said nut against rotation with respect thereto, said detent means being disengageable from said nut upon the exertion of a predetermined force; and
  • said detent means comprises a washer having at least one downwardly protruding detent; said nut including at least one depression in the top surface thereof for receiving said detent; said chair support means being slidably joined to said nut whereby said chair-support means can be slid vertically with respect to said nut at least a distance great enough to allow said detent to slide out of said depression.
  • said chair-support means comprises a column, generally sleeve like in configuration; said column including a collar at the base thereof, said collar resting on said washer and embracing said nut, said collar including an opening therein through which said spindle passes, said collar including a generally vertical, elongated slot; a pin on said nut projecting radially therefrom through said slot.
  • said washer includes a key projecting radially inwardly; said spindle including a groove therein extending generally from top to bottom thereof; said key being positioned within said groove to thereby fix said washer against rotation with respect to said spindle.
  • said washer includes a key projecting radially inwardly; said spindle including a groove therein extending generally from top to bottom thereof; said key being positioned within said groove to thereby fix said washer against rotation with respect to said spindle.
  • a height-adjusting mechanism for a chair or the like comprising:
  • a chair-supporting column operably connected to said nut, being slidable vertically with respect thereto and being fixed against rotation with respect thereto;
  • a detent washer resting on top of said nut and including at least one downwardly projecting detent
  • said nut including at least one detent receiving depression in the top thereof;
  • said washer being positioned around said spindle and being slidable vertically with respect thereto. but being fixed against rotation with respect thereto; said column resting on said washer;
  • said washer includes a key projecting radially inwardly; said spindle including a groove therein extending generally from top to bottom thereof; said key being positioned within said groove to thereby fix said washer against rotation with respect to said spindle.
  • said column comprises a sleeve having a collar at the bottom thereof; said collar resting on said washer and embracing said nut; said collar including an opening therethrough through which said spindle passes; said collar including an elongated, generally vertical slot through which said pin passes.
  • said washer includes a key projecting radially inwardly; said spindle including a groove therein extending generally from top to bottom thereof; said key being positioned within said groove to thereby fix said with respect to said spindle.

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US00285188A 1972-08-31 1972-08-31 Height adjusting mechanism Expired - Lifetime US3799485A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US00285188A US3799485A (en) 1972-08-31 1972-08-31 Height adjusting mechanism
US00285527A US3799486A (en) 1972-08-31 1972-08-31 Height adjusting mechanism
CA167,043A CA986002A (en) 1972-08-31 1973-03-26 Height adjusting mechanism
CA176,513A CA1004126A (en) 1972-08-31 1973-07-16 Height adjusting mechanism
DE19732343328 DE2343328A1 (de) 1972-08-31 1973-08-28 Hoeheneinstellvorrichtung fuer stuehle, sessel o.dgl
JP48096246A JPS4970757A (de) 1972-08-31 1973-08-29
GB4104373A GB1401937A (en) 1972-08-31 1973-08-31 Height adjusting mechanisms

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US00285188A US3799485A (en) 1972-08-31 1972-08-31 Height adjusting mechanism
US00285527A US3799486A (en) 1972-08-31 1972-08-31 Height adjusting mechanism

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US3799485A true US3799485A (en) 1974-03-26

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US00285188A Expired - Lifetime US3799485A (en) 1972-08-31 1972-08-31 Height adjusting mechanism
US00285527A Expired - Lifetime US3799486A (en) 1972-08-31 1972-08-31 Height adjusting mechanism

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Application Number Title Priority Date Filing Date
US00285527A Expired - Lifetime US3799486A (en) 1972-08-31 1972-08-31 Height adjusting mechanism

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US (2) US3799485A (de)
JP (1) JPS4970757A (de)
CA (2) CA986002A (de)
DE (1) DE2343328A1 (de)
GB (1) GB1401937A (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026509A (en) * 1976-01-13 1977-05-31 Herman Miller, Inc. Adjustable standard for swivel chair
US4324382A (en) * 1979-06-21 1982-04-13 Steelcase Inc. Height adjustable chair base
US4494795A (en) * 1982-05-06 1985-01-22 Steelcase Inc. Variable back adjuster for chairs
WO1986000205A1 (en) * 1984-06-18 1986-01-16 Werner Per Gunnar Improvements in adjustable telescopic devices
US4627602A (en) * 1984-06-05 1986-12-09 Hag A/S Mechanical lifting device
US4709894A (en) * 1986-04-10 1987-12-01 Steelcase Inc. Slip connector for weight actuated height adjustors
US4720071A (en) * 1986-12-19 1988-01-19 Haworth, Inc. Split nut mechanical height adjusting mechanism for chair
US4750701A (en) * 1987-05-05 1988-06-14 Illinois Tool Works, Inc. Chair height adjustment mechanism
US4903930A (en) * 1988-11-04 1990-02-27 Jann James M Chair height adjustment mechanism
US5031869A (en) * 1987-05-05 1991-07-16 Illinois Tool Works Inc. Control assembly for chair height adjustment
US20060130713A1 (en) * 2004-12-17 2006-06-22 Steelcase Development Corporation Load compensator for height adjustable table
US20070137535A1 (en) * 2005-12-16 2007-06-21 Steelcase Development Corporation Load compensator for height adjustable table
US20090121100A1 (en) * 2007-11-14 2009-05-14 Veyhl Gmbh Length adjustable support
US20130075549A1 (en) * 2011-09-24 2013-03-28 Wen-Hsiu Huang Supporting Structure of a stage
WO2020245751A1 (en) * 2019-06-04 2020-12-10 Shilo Yair Telescopic item and mechanism therefor
US20200405056A1 (en) * 2018-02-14 2020-12-31 Kinema Gmbh Seating and Support Furniture

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3870270A (en) * 1973-10-31 1975-03-11 Harter Corp Fully enclosed, adjustable, support column for a pivotal chair
US3923280A (en) * 1975-03-21 1975-12-02 Harter Corp Adjustable support column for a pivotal chair
US3991965A (en) * 1976-01-27 1976-11-16 Gf Business Equipment, Inc. Chair height adjusting mechanism
US4315613A (en) * 1979-11-01 1982-02-16 Bliss & Laughlin Mechanical height adjustment mechanism for chairs
US4394001A (en) * 1981-03-18 1983-07-19 Haworth, Inc. Height-adjusting mechanism for chair seat
US4540148A (en) * 1983-11-10 1985-09-10 Jann James M Chair height adjustment mechanism
US4598892A (en) * 1984-07-27 1986-07-08 Haworth, Inc. Mechanical chair-height control mechanism
US5749557A (en) * 1996-05-23 1998-05-12 Huang Ching-Feng Height adjusting device for a chair

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US2060075A (en) * 1934-06-11 1936-11-10 Bassick Co Swivel chair mounting
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US3386697A (en) * 1966-08-02 1968-06-04 Knoll Associates Rotatable chair height-adjustment mechanism
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GB1226763A (de) * 1967-04-27 1971-03-31
US3606234A (en) * 1970-02-24 1971-09-20 Collier Keyworth Co Releasable swivel chair support construction
US3691858A (en) * 1969-10-10 1972-09-19 Richard Wilke Electromotive adjusting device

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US400528A (en) * 1889-04-02 Piano-stool
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US457774A (en) * 1891-08-18 John gilson
US1160108A (en) * 1914-02-02 1915-11-09 Otis Ridgeway Hasty Adjustable rotary hub for furniture.
US2060075A (en) * 1934-06-11 1936-11-10 Bassick Co Swivel chair mounting
US2504018A (en) * 1945-11-15 1950-04-11 Curtiss Wright Corp Screw operated clutch
US2543924A (en) * 1947-04-05 1951-03-06 Mondy Peter Adjustable seat support for chairs
US2771787A (en) * 1955-11-08 1956-11-27 Duff Norton Co Push-pull jack
US3391893A (en) * 1966-02-14 1968-07-09 Frank Doerner & Sons Ltd Thrust bearing for a swivel chair
US3386697A (en) * 1966-08-02 1968-06-04 Knoll Associates Rotatable chair height-adjustment mechanism
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Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026509A (en) * 1976-01-13 1977-05-31 Herman Miller, Inc. Adjustable standard for swivel chair
US4324382A (en) * 1979-06-21 1982-04-13 Steelcase Inc. Height adjustable chair base
US4494795A (en) * 1982-05-06 1985-01-22 Steelcase Inc. Variable back adjuster for chairs
US4627602A (en) * 1984-06-05 1986-12-09 Hag A/S Mechanical lifting device
WO1986000205A1 (en) * 1984-06-18 1986-01-16 Werner Per Gunnar Improvements in adjustable telescopic devices
US4860987A (en) * 1984-06-18 1989-08-29 Mec-Lift A.S. Adjustable telescopic devices
US4709894A (en) * 1986-04-10 1987-12-01 Steelcase Inc. Slip connector for weight actuated height adjustors
US4872635A (en) * 1986-04-10 1989-10-10 Steelcase Inc. Slip connector for weight actuated height adjustors
US4720071A (en) * 1986-12-19 1988-01-19 Haworth, Inc. Split nut mechanical height adjusting mechanism for chair
US4750701A (en) * 1987-05-05 1988-06-14 Illinois Tool Works, Inc. Chair height adjustment mechanism
US5031869A (en) * 1987-05-05 1991-07-16 Illinois Tool Works Inc. Control assembly for chair height adjustment
US4903930A (en) * 1988-11-04 1990-02-27 Jann James M Chair height adjustment mechanism
US10051955B1 (en) 2004-12-17 2018-08-21 Steelcase Inc. Load compensator for height adjustable table
US9913532B1 (en) 2004-12-17 2018-03-13 Steelcase Inc. Load compensator for height adjustable table
US20060145036A1 (en) * 2004-12-17 2006-07-06 Steelcase Development Corporation Height adjustable table
US10420417B1 (en) 2004-12-17 2019-09-24 Steelcase Inc. Load compensator for height adjustable table
US20060130713A1 (en) * 2004-12-17 2006-06-22 Steelcase Development Corporation Load compensator for height adjustable table
US20060130714A1 (en) * 2004-12-17 2006-06-22 Steelcase Development Corporation Load compensator for height adjustable table
US7658359B2 (en) 2004-12-17 2010-02-09 Steelcase Development Corporation Load compensator for height adjustable table
US8091841B2 (en) 2004-12-17 2012-01-10 Steelcase Inc. Load compensator for height adjustable table
US9826825B1 (en) 2004-12-17 2017-11-28 Steelcase Inc. Load compensator for height adjustable table
US9591920B2 (en) 2004-12-17 2017-03-14 Steelcase Inc. Load compensator for height adjustable table
US20070137535A1 (en) * 2005-12-16 2007-06-21 Steelcase Development Corporation Load compensator for height adjustable table
EP2060202A2 (de) * 2007-11-14 2009-05-20 Veyhl GmbH Längenverstellbare Stütze
US20090121100A1 (en) * 2007-11-14 2009-05-14 Veyhl Gmbh Length adjustable support
US20130075549A1 (en) * 2011-09-24 2013-03-28 Wen-Hsiu Huang Supporting Structure of a stage
US20200405056A1 (en) * 2018-02-14 2020-12-31 Kinema Gmbh Seating and Support Furniture
US11937708B2 (en) * 2018-02-14 2024-03-26 Mykinema Gmbh Seating and support furniture
WO2020245751A1 (en) * 2019-06-04 2020-12-10 Shilo Yair Telescopic item and mechanism therefor
US20220088498A1 (en) * 2019-06-04 2022-03-24 Hasbro, Inc. Telescopic item and mechanism therefor
US11980827B2 (en) * 2019-06-04 2024-05-14 Hasbro, Inc. Telescopic item and mechanism therefor
US20240261695A1 (en) * 2019-06-04 2024-08-08 Yair Shilo Telescopic item and mechansim therefor
US12330082B2 (en) * 2019-06-04 2025-06-17 Yair Shilo Telescopic item and mechansim therefor

Also Published As

Publication number Publication date
US3799486A (en) 1974-03-26
GB1401937A (en) 1975-08-06
CA1004126A (en) 1977-01-25
JPS4970757A (de) 1974-07-09
DE2343328A1 (de) 1974-03-14
CA986002A (en) 1976-03-23

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