US2750993A - Folding and adjustable chair back - Google Patents

Folding and adjustable chair back Download PDF

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Publication number
US2750993A
US2750993A US398487A US39848753A US2750993A US 2750993 A US2750993 A US 2750993A US 398487 A US398487 A US 398487A US 39848753 A US39848753 A US 39848753A US 2750993 A US2750993 A US 2750993A
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US
United States
Prior art keywords
chair
frame
chair back
arm rest
lock
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
US398487A
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English (en)
Inventor
Eugene R Mcgregor
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.)
Reconstruction Finance Corp
Original Assignee
Reconstruction Finance Corp
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
Priority to CA555872A priority Critical patent/CA555872A/fr
Application filed by Reconstruction Finance Corp filed Critical Reconstruction Finance Corp
Priority to US398487A priority patent/US2750993A/en
Priority to GB7286/54A priority patent/GB745995A/en
Priority to FR1100433D priority patent/FR1100433A/fr
Application granted granted Critical
Publication of US2750993A publication Critical patent/US2750993A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C4/00—Foldable, collapsible or dismountable chairs
    • A47C4/04—Folding chairs with inflexible seats
    • A47C4/18—Folding chairs with inflexible seats having a frame made of metal
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
    • A47C1/025—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination by means of a rack-and-pinion or like gearing mechanism
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
    • A47C1/026—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism
    • A47C1/0265—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism positioned under the arm-rests
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
    • A47C1/027—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination by means of clamps or friction locking members
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C4/00—Foldable, collapsible or dismountable chairs
    • A47C4/04—Folding chairs with inflexible seats
    • A47C4/18—Folding chairs with inflexible seats having a frame made of metal
    • A47C4/20—Folding chairs with inflexible seats having a frame made of metal with legs pivotably connected to seat or underframe
    • A47C4/22—Folding chairs with inflexible seats having a frame made of metal with legs pivotably connected to seat or underframe of adjustable type
    • 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
    • A47C7/407—Support for the head or the back for the back of collapsible type

Definitions

  • My invention relates to an improvement in chairs and has for one of its objects to provide a chair or seat with new and improved reclining mechanism as well as new and improved mechanism for permitting the chair and its arm rests to be folded or collapsed for storage, transportation, etc.
  • the present invention provides a chair or seat in which the reclining mechanism, that is to say, the mechanism which controls the movement of the chair back to various reclining positions, is enclosed in the side arm rests of the chair.
  • the reclining mechanism just referred to and the mechanism which permits the back to be folded or collapsed are of simple, sturdy construction, and the latter is connected to the arm rests and their contained reclining mechanism in such a manner that the back and arm rests collapse simultaneously. Furthermore the arrangement is such that not only may the back be folded down or collapsed so as to occupy the minimum of space, but the arm rests at the same time will lie below the level of the folded back. In this way, not only are the dimensions of the folded or collapsed chair assembly reduced to a minimum, but the arm rests are protected against storage and transportation abuse.
  • the mechanism which adapts the chair back for tipping or reclining to an infinite number of positions may be referred to as a lock drag and, as mentioned, is installed in the side arm shell of the chair, and, inasmuch as this shell is open on its underside, the lock-drag mechanism is always available for adjustment without the aid of special tools. Furthermore, the arm shell is readily removable so as to expose the entire enclosed mechanism for maintenance.
  • Figs. 1, 2, and 3 are perspective views, showing a chair embodying my invention in extended position, partially folded position, and completely folded or collapsed position, respectively;
  • Fig. 4 is a side-elevational view of the chair of Figs. 1, 2, and 3;
  • Fig. 5 is a plan view of one of the arm rests with the shell removed;
  • Fig. 7 is a fragmentary view, showing part of the chairfolding mechanism.
  • Figs. 8 and 9 are fragmentary views also showing certain details of the folding mechanism.
  • FIG. 1 A two-seated chair has been shown for illustrative purposes only, my invention being usable with single-seated chairs as well as with chairs having more than two seats.
  • FIGs. 4, 7, 8 and 9. 8 and 10 designate brackets, which are welded or otherwise rigidly attached to each of the tubular members 12, constituting the sides of the chair frame.
  • the chair frame also comprises tubular members or legs 14, which are a part of the members 6, above referred to.
  • Each side frame member 12 at its rear end is provided with an extension 16.
  • Each of the brackets 8 supports a tubular member or brace 18, which is anchored to the rear frame member 20 of the chair frame and extends forwardly to a point above the bracket 10.
  • the brace 18 is open at its bottom at its front end, and lying within the same is a locking element constituting part of the mechanism by which the chair is held in extended position.
  • the illustrated mechanism comprises two metal locking jaws 22 and 24, attached to each other at 26 by a bolt 28.
  • a strap 30 extends from this bolt to a bolt 32, by which the tubular element 18 is rigidly attached to the upper end of the bracket 3.
  • the jaws 22 and 24 pivot on the bolt 28, so that the outer ends of these two jaws may be separated slightly for unlocking purposes, as will be brought out hereinafter.
  • I provide an adjustable spring 34, which may be adjusted simply by rotating the adjusting nut 35.
  • a tubular member or vertical post 36 Pivotally attached to the upper end of the bracket 10 is an upright tubular member or vertical post 36, this pivotal connection between the bracket and the post being clearly shown in Fig. 9.
  • a strap 38 Secured to the tubular member 36, adjacent the outer ends of the jaws 22 and 24, is a strap 38, across the ends of which I provide a locking pin 40, this pin lying in a hole 42, provided for that purpose in the jaws 22 and 24 near the front end thereof.
  • the outer ends of the jaw members 22 and 24 are beveled, as indicated at 44, to enable the pin 40 to force the jaws apart sutficiently to enable it to move into the transverse hole 42.
  • the chair parts are in extended position.
  • each of these extensions is shaped to provide a neck 46, which constitutes one of the bearings for the chair back 48 about which the back is moved for reclining purposes and for collapsing or folding of the chair.
  • the frame of the chair back comprises a frame 50, and this is pivoted to the necks 46, as indicated at 52.
  • each arm rest shell 4 installed within each arm rest shell 4 is a lock drag for controlling tilting of the chair back 48, and, as will be brought out shortly, this mechanism is tied to the post 36 so that not only may the arm rests and contained mechanism be folded down into collapsed position, but they must be folded simultaneously with the movement of the chair back to collapsed position.
  • the lock-drag mechanism comprises a tubular element 56, which is rectangular in cross-section.
  • a rack 58 Contained within the tubular element 56 is a rack 58.
  • This rack is pivoted to the frame 50 of the back of the chair, as seen at 60, and is bodily movable longitudinally, rearwardly and forwardly relatively to the chair frame.
  • the rack 58 will be moved endwise Within the tube 56 and in the same direction.
  • the rack will be moved in the opposite direct-ion when the chair back is moved again toward vertical position.
  • the teeth of the rack 58 constantly mesh with a pinion 62, mounted on pinion shaft 64, which passes through the side walls of the tubular member 56.
  • This pinion shaft 64 carries a drum 66, which, for clarity, will be referred to as a lock-drag drum, this drum being mounted at the exterior of 56.
  • a lock-drag cable 58 one end of which is anchored to the tubular member 56 to one side of the drum 66 through the medium of member '70, the stem of which passes through the two side walls of the tubular member.
  • This anchor for this end of the cable, may be adjusted by manipulation of the knurled nut 72.
  • the opposite end of the cable 68 is attached at the other side of the drum 66 to the stem 74 of a push button '76 through the medium of clevis 78 and a pin 80, which passes through the push button stem 74.
  • the push button stem 74 is equipped with coil spring $2 for maintaining tension on the cable 68 at all times, so that there is always a braking effect or drag on the drum 66, this drag effect being adjustable or variable by manipulation of the knurled nut '72, previously referred to.
  • a tension spring 84 Within the tubular member 56 is a tension spring 84, one end of which is fastened to the stem of the cable anchor 79, previously referred to, and, hence, fixed with respect to member 56; the other end of this spring is attached to the rack 58 through the medium of a pin 86.
  • This spring 84 cooperates with the cable 68 and drum 66 in tilting of the chair back in both rearward and forward directions, the cable tension being so set as barely to overcome the spring 84 when the chair back is at full recline.
  • the stem of the anchor member '70 limits forward movement of the rack. This stopped position of the rack 58 is the position which it takes when the chair back 48 is in vertical position.
  • the upright posts 36 which have previously been referred to, are pivoted at their lower ends to the brackets 10, as seen at 88, while at their upper ends they are pivoted, as seen at 9r), to straps 92 with which the members 56 are provided.
  • the parts are so dimensioned and relatively disposed that, not only will the back and arm rests collapse simultaneously, but in fully collapsed position the arm rests and their contained mechanism lie below the level of the back, as clearly illustrated in Fig. 4. This reduces the total folded thickness of the chair assembly and, of course, protects the arms of the chair from abuse.
  • the arm rest construction above described provides for ready adjustment and maintenance of the lock drag and tilting mechanism, while the arm rest construction, together with the locking and folding mechanism shown in Fig. 7, for example, reduces the dimensions of the chair for storage or shipment purposes and also makes it possible quickly to collapse the back of the chair so as to gain access to an emergency exit, for example, which permits the chair to be placed anywhere in an air craft cabin without regard to exit locations.
  • a chair comprising, in combination, a frame; a back pivoted to the frame; an arm rest; and lock-drag mechanism for controlling tilting of the back, said lockdrag mechanism comprising a rack within the arm rest and pivotally attached at its rear end to said back, a tension spring lying within the arm rest attached at one end to said rack and at its other end to the arm rest, a pinion within the arm rest meshing with said rack, and means carried by the arm rest for applying an adjustable braking effort to the pinion.
  • a chair comprising, in combination, a frame; a back pivoted to the frame; an arm rest; lock-drag mechanism mounted within said arm rest and pivotally attached to said back for controlling tilting of said back; a post beneath said arm rest; a pivotal connection between the upper end of said post and the arm rest and between the lower end of said post and the chair frame, said pivots being so disposed relatively to each other as to enable the arm rest and its contained lock-drag mechanism and the chair back to be folded or lowered into completely collapsed position upon the chair frame.
  • a chair comprising, in combination, a frame; a back pivoted thereto; an arm rest; and lock-drag mechanism within the arm rest for controlling tilting of the said back about the pivotal connection between the back and frame, said lock-drag mechanism comprising a tubular element constituting part of an arm rest, a rack mounted within the said tubular element and movable along the same, means for pivotally attaching the rear end of the rack to the chair back, a pinion within the tubular element in constant mesh with said rack, a lockdrag drum carried by the tubular element concentric with said pinion, a cable about said drum, means for anchoring the inner end of the cable to the tubular element, a Spring-loaded push button extending into the outer end of said tubular element, and means for attaching the outer end of said cable to said button, whereby the pushbutton loading spring will maintain said cable under tension about said drum to exert a drag against rotation of the same, thereby to control tilting of the chair back about its pivotal connection to the chair frame.
  • a chair comprising, in combination, a frame; a back pivoted thereto; an arm rest; and lock-drag mechanism within the arm rest for controlling tilting of the chair back about the pivotal connection between the back and frame, said lock-drag mechanism comprising a tubular element constituting part of the arm rest, a rack mounted within said arm rest element and having its inner end pivoted to the chair back, said rack being movable lengthwise within said arm rest element, a spring within the arm rest element having its inner end attached to the rack and its outer end anchored to the said tubular element, a pin extending across said tubular element, a pinion within said element mounted on said pin and constantly in mesh with said rack, a drum concentric with the pinion mounted on said pin at the exterior of said tubular element, a lock-drag cable about said drum, one end of the cable being adjustably anchored to the tubular element, a push button at the outer end of the tubular element, the other end of said cable being attached to said button, and an expansion spring carried by the push button outward
  • a chair comprising, in combination, a frame; a chair back pivoted thereto; an arm rest comprising lockdrag mechanism pivotally attached to the chair back; a post beneath the arm rest having its upper end pivoted to the arm rest and its lower end pivoted to the chair frame, whereby the chair back and arm rest including the lock-drag mechanism may be folded over or collapsed upon the chair frame; and locking mechanism for normally maintaining the back and arm rest in extended position, said locking mechanism comprising a tubular member attached at one end to the rear part of the chair frame and extending forwardly into close proximity to said post, spring-closed locking jaws within the said tubular member at the forward end thereof, and a pin carried by said post and adapted to be gripped by said jaws, thereby to lock the post in upright position to maintain the chair back and arm rest in extended or uncollapsed position.
  • a chair comprising, in combination, a frame; a chair back pivoted thereto; an arm rest; mechanism mounted within the arm rest and attached to the chair back; a post pivoted to the arm rest and to said frame; spring locking jaws attached to the frame and cooperating with said post to lock the chair in uncollapsed position while permitting tilting of the chair back, said locking jaws being arranged to release said post upon the application of force to the chair back in a directon to fold the back down upon sad frame, the parts being so disposed relatively to each other that, in folded or collapsed position, the arm rest will lie below the level of the upper face of the chair back.
  • a chair comprising, in combination, a frame; a chair back pivoted thereto; an arm rest; lock-drag mechanism within the arm rest and attached to one end to the chair back to control tilting of the chair back relative to the frame; a member intermediate the lock-drag mechanism and said frame and pivotally attached to each; and quick-release locking mechanism carried by said frame for locking said intermediate member against pivotal movement relative to said frame during tilting of the chair back relative to said frame under the control of said lock-drag mechanism, said chair back, arm rest, lock-drag mechanism, and intermediate member being collapsible as a unit in a forward direction upon release of said locking mechanism.
US398487A 1953-12-16 1953-12-16 Folding and adjustable chair back Expired - Lifetime US2750993A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA555872A CA555872A (fr) 1953-12-16 Chaises ou sieges
US398487A US2750993A (en) 1953-12-16 1953-12-16 Folding and adjustable chair back
GB7286/54A GB745995A (en) 1953-12-16 1954-03-12 Improvements in and relating to collapsible chairs
FR1100433D FR1100433A (fr) 1953-12-16 1954-03-19 Fauteuils et sièges similaires

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US398487A US2750993A (en) 1953-12-16 1953-12-16 Folding and adjustable chair back

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US2750993A true US2750993A (en) 1956-06-19

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US398487A Expired - Lifetime US2750993A (en) 1953-12-16 1953-12-16 Folding and adjustable chair back

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US (1) US2750993A (fr)
CA (1) CA555872A (fr)
FR (1) FR1100433A (fr)
GB (1) GB745995A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001821A (en) * 1958-06-30 1961-09-26 & Commerciale R Marechal S I C Adjustable seat structure
US3439889A (en) * 1967-02-13 1969-04-22 Hardman Aerospace Aircraft seating structure
US3495872A (en) * 1967-12-22 1970-02-17 Artnell Co Vehicle seat
US3744843A (en) * 1969-01-17 1973-07-10 American Seating Co Vehicle chair unit
US4687252A (en) * 1985-07-01 1987-08-18 Fisher Dynamics Corporation Seat recliner mechanism with spring coil actuator and redundant positioning
USD979272S1 (en) * 2022-07-13 2023-02-28 Series International, Llc Chair

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2211084A (en) * 1987-10-21 1989-06-28 Paul Martin Allen Seating
US5730495A (en) * 1996-05-28 1998-03-24 Sears Manufacturing Company Folding seat assembly

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US201912A (en) * 1878-04-02 Improvement in reclining-chairs
US293393A (en) * 1884-02-12 Reclining and folding chair
US960607A (en) * 1910-04-14 1910-06-07 Frank Bernard Wersel Jr Automatic reclining-chair back.
US1444024A (en) * 1920-08-31 1923-02-06 John S Burdick Adjustable seat
US1701604A (en) * 1926-07-02 1929-02-12 Boery Jean Seat provided with a reclining back
US1773597A (en) * 1930-01-08 1930-08-19 Myerson Adolph Reclining chair
US1929471A (en) * 1933-04-13 1933-10-10 Sylvia Bank Furniture
US2133471A (en) * 1936-06-30 1938-10-18 Dougias Aircraft Company Inc Adjustable chair
US2273428A (en) * 1939-05-03 1942-02-17 Sylvia Bank Furniture

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US201912A (en) * 1878-04-02 Improvement in reclining-chairs
US293393A (en) * 1884-02-12 Reclining and folding chair
US960607A (en) * 1910-04-14 1910-06-07 Frank Bernard Wersel Jr Automatic reclining-chair back.
US1444024A (en) * 1920-08-31 1923-02-06 John S Burdick Adjustable seat
US1701604A (en) * 1926-07-02 1929-02-12 Boery Jean Seat provided with a reclining back
FR35395E (fr) * 1926-07-02 1930-03-08 Dispositif permettant l'inclinaison, à n'importe quel point de sa course, du dossier d'un fauteuil, facilement manoeuvré par la personne assise dans ce fauteuil
US1773597A (en) * 1930-01-08 1930-08-19 Myerson Adolph Reclining chair
US1929471A (en) * 1933-04-13 1933-10-10 Sylvia Bank Furniture
US2133471A (en) * 1936-06-30 1938-10-18 Dougias Aircraft Company Inc Adjustable chair
US2273428A (en) * 1939-05-03 1942-02-17 Sylvia Bank Furniture

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001821A (en) * 1958-06-30 1961-09-26 & Commerciale R Marechal S I C Adjustable seat structure
US3439889A (en) * 1967-02-13 1969-04-22 Hardman Aerospace Aircraft seating structure
US3495872A (en) * 1967-12-22 1970-02-17 Artnell Co Vehicle seat
US3744843A (en) * 1969-01-17 1973-07-10 American Seating Co Vehicle chair unit
US4687252A (en) * 1985-07-01 1987-08-18 Fisher Dynamics Corporation Seat recliner mechanism with spring coil actuator and redundant positioning
US4705319A (en) * 1985-07-01 1987-11-10 Fisher Dynamics Corporation Seat recliner mechanism with spring coil actuator and creep eliminator feature
USD979272S1 (en) * 2022-07-13 2023-02-28 Series International, Llc Chair
USD1019161S1 (en) * 2022-07-13 2024-03-26 Series International, Llc Chair

Also Published As

Publication number Publication date
FR1100433A (fr) 1955-09-20
CA555872A (fr) 1958-04-15
GB745995A (en) 1956-03-07

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