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US2859799A - Functional posture controller for chairs - Google Patents

️Tue Nov 11 1958

US2859799A - Functional posture controller for chairs - Google Patents

Functional posture controller for chairs Download PDF

Info

Publication number

US2859799A

US2859799A US582390A US58239056A US2859799A US 2859799 A US2859799 A US 2859799A US 582390 A US582390 A US 582390A US 58239056 A US58239056 A US 58239056A US 2859799 A US2859799 A US 2859799A Authority

United States

Prior art keywords

chair

seat

angular

portions

chairs

Prior art date

1956-05-03

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

US582390A

Inventor

Edwin R Moore

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Individual

Original Assignee

Individual

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1956-05-03

Filing date

1956-05-03

Publication date

1958-11-11

1956-05-03 Application filed by Individual filed Critical Individual

1956-05-03 Priority to US582390A priority Critical patent/US2859799A/en

1957-05-02 Priority to GB14046/57A priority patent/GB848092A/en

1957-05-03 Priority to FR1174489D priority patent/FR1174489A/en

1958-11-11 Application granted granted Critical

1958-11-11 Publication of US2859799A publication Critical patent/US2859799A/en

1975-11-11 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Images

Classifications

- 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
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
- 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
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
- 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
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
- A47C1/03266—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with adjustable elasticity
- 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
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
- A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S297/00—Chairs and seats
- Y10S297/04—Wheelchair

Definitions

This feature of my invention also avoids the tendency of hitherto known similar chairs to pull out the occupants shirt with an opposing motion of the chair back when reclining
Another object of the present invention is the provision of a device of the character described which is provided with a lever or hell crank arrangement that has a forward and backward moveability independent of the lowering and raising of the chair seat, and to which thecha'ir back is attached in such a manner as to give a unison relation with the occupants back, so that the chair back creepsforwardly whenrecli'ning, thus hugging the occupants back with angular relation, and synchro nizing all motions into one.
Yet still another object of-the present invention is the provision of a device of the character described which has a new and improved adjustment nut design and arr angem en't on the swivel spindle, said nut being partially split into segments and tapered at the ends to conform to an adaptor collar.
This arrangement will maintain a constant heighth of the chair seat, allows a finger touch adjustment "of the same when desired, and eliminates the need formilling out a long keyway groove in the-spindle, thusavoiding-awakening of the spindle and being more economical to manufacture than hitherto known similar constructions.
Fig. 2 is a side view like Fig. 1, showing the chair in an inclined position;
Fig. 3 is an enlargedfractional sectional view on the line 3 -3 of Fig. 1;
Fig. 4 is a further enlarged fractional sectional view on the line 4'- 4 of Fig. 3
An adaptor collar 17, which has a taper portion 20 corresponding to the taper lower end 14 of the nut 7, is interposed between the member 4 and the nut 7.
the aforementioned partially segmental splitting of the nut 7 by means of the slots 11 and the taper portions 14 and 20 cause a clinching effect of the nut 7 on the spindle 5, due to the weight of the occupant of the chair as well as 'of those parts of the chair which are supported by thespindle 5.
the nut 7 will hold securely on the spindle 5 and swivel with the spindle 5, sodas to maintain a constant heighth of the chair, or allowing finger-touch adjustment by turning of the membeil15 as previously referred to.
the seat 23 of the chair is secured by any suitable means, for instance by means of screws 25 (Fig. 3) to a seat frame consisting preferably of a pair of parallel angle bars 24, which have registering slots 27.
a swivel frame 30' has a pair 'of angular portions 31 which are joined to each other by means of cross portions 32 and 33';- The spindle 5 extends from the cross portion 33, to which it is firmly secured.
the upper ends of the angular portions 31 of the swivel frame 30 are pivoted to the angle bars 24 at 35.
Two pairs of link members 37. and 40 are'pivot'ed to the horizontal sections of the angular portions 31 of the frame 30 at 41 and 42 respectively.
a substantially U-shaped member 43 which Basia pair of longitudinal flange portions 44 and a web portion 45' is mov'ably interposed with its 'flange portions 4.4 between :the 'bars24.
-An up'right'member 47 which parries achair back 50, is firmly secured to the web portion 45 of the member 43 so as to form therewith an angular member.
the contour adjusting dial member 67 is a specific feature of my invention. When the member 67 is turned in one direction the spring 64 is collapsed to any desired position, allowing the chair to assume any contour, which will remain relative to the posture for the occupant of the chair at any adjustment of axis location in relation to the hip axis of the occupant.
a chair of the character described the combination of a pedestal, a threaded post extending upwardly from said pedestal, a swivel frame having a pair of angular portions joined to each other by cross portions one of which is secured to said post, a seat frame having a pair of parallel portions pivoted to the outer ends of the angular portions of said swivel frame and provided with registering longitudinal slots, a chair seat carried by said seat frame, a chair back, an angular member having two branch portions to the first of which said chair back is secured while the second is extended between the parallel portions of said seat frame, a fulcrum rod extending through the slots in said seat frame and through the second branch portion of said angular member, a first pair of link members pivotably connecting said fulcrum rod to the angular portions of said swivel frame to which said seat frame is secured, a second pair of link members pivotably connecting the angular portions of said swivel frame to the outer end of the said branch portion of said angular
a tilting chair the combination of a pedestal, a post extending upwardly from said pedestal, a swivel frame having a pair of angular portions joined to each other by crossportions one of which is secured to said post, a seat frame having a pair of parallel portions pivoted to the outer ends of the angular portions of said swivel frame and provided with registering longitudinal slots, a chair seat carried by said seat frame, a chair back, an angular member having two branch portions to the first of which said chair back is secured while the second is extended between the parallel portions of said seat frame, a fulcrum rod extending through the slots in said seat frame and through the second branch portion of said angular member, a first pair of link members pivotably connecting said fulcrum rod to the angular portions of said swivel frame to which said seat frame is secured, a second pair of link members pivotably connecting the angular portions of said swivel frame to the outer end of the second branch portion of said angular member, resilient means

Landscapes

Health & Medical Sciences (AREA)
Dentistry (AREA)
General Health & Medical Sciences (AREA)
Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Chairs Characterized By Structure (AREA)

Description

Nov. 11, 1958 E. R. MOORE 2,859,799

' FUNCTIONAL POSTURE CONTROLLER FOR CHAIRS 2 Sheets-

Sheet

1 Filed May 3. 195a INVENTOR. EDWIN R. MOORE -ATTO RN EY Nov. 11, 1958 E. R. MOORE- FUNCTIONAL POSTURE CONTROLLER FOR CHAIRS 2 Sheet'sSheet 2 Filed May 5, 1956 m I; J 2/ 2:

1 I x INVENTORY EDWIN R. M0 0RE ATTORNEY United States Patent FUNCTIONAL POSTURE CONTROLLER FOR CHAIRS Edwin R. Moore, New York, N. Y. Application May 3, 1956, Serial No. 582,390 2 Claims. (cl. 155-47 My invention relates generally to chairs of the type having a tilting seat and back and in particular to a chair having seat and back elements which automatically adjust themselves relatively as the back is inclined, and commonly referred to as a posture chair, although the principle of my invention can be applied also to other devices. I

One object of the present invention is the provision of a device of the character described which affords related posture control in all positions of a chair wherein the seat and the back tilt at diiterent angles, so as to avoid that the tilting of the seat and back of the chair will cause a loss of posture fit or angular relation to the occupant while reclining. This feature of my invention also avoids the tendency of hitherto known similar chairs to pull out the occupants shirt with an opposing motion of the chair back when reclining Another object of the present invention is the provision of a device of the character described which is provided with a lever or hell crank arrangement that has a forward and backward moveability independent of the lowering and raising of the chair seat, and to which thecha'ir back is attached in such a manner as to give a unison relation with the occupants back, so that the chair back creepsforwardly whenrecli'ning, thus hugging the occupants back with angular relation, and synchro nizing all motions into one.

A further object of the present invention is the provision of a device of "the character described which has a contour adjusting dial built inside of an adjustment wheel for the tension of a spring that tends to hold the chair upright; by turning said dial said spring is collapsed to any desired position allowing the chair to assume any contour position, which remains relative to the occupants position at any adjustment in relation to the hip axis of the occupant.

Yet still another object of-the present invention is the provision of a device of the character described which has a new and improved adjustment nut design and arr angem en't on the swivel spindle, said nut being partially split into segments and tapered at the ends to conform to an adaptor collar. This arrangement will maintain a constant heighth of the chair seat, allows a finger touch adjustment "of the same when desired, and eliminates the need formilling out a long keyway groove in the-spindle, thusavoiding-awakening of the spindle and being more economical to manufacture than hitherto known similar constructions.

With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts hereinafter more fully described and pointed out in the claims, it being understood that changes may be made in the construction and arrangements of parts without departing from the spirit of the invention as claimed.

In the accompanying drawing a preferred form of the invention has been shown.

2,859,799 Patented Nov. 11, 1958 ICC In said drawing:

Figure 1 is a side view of a preferred embodiment of my invention with the chair in an upright position;

Fig. 2 is a side view like Fig. 1, showing the chair in an inclined position;

Fig. 3 is an enlargedfractional sectional view on the line 3 -3 of Fig. 1; and,

Fig. 4 is a further enlarged fractional sectional view on the line 4'- 4 of Fig. 3

Similar reference characters refer to similar parts throughout the several views.

In the drawing the

numeral

1 denotes a base or pedestal which has mounted on its top a disk 2 provided with a central bore 3 (Fig. 4) through which extends a

bushing member

4. A

chair spindle

5 extends through the

member

4, and a

heighth adjustment nut

7 is screwed upon the

spindle

5. The

nut

7 has an exterior

annular groove

10, is partially split into segments by means of upright slots 11', and has a tapered lower end 14. A 'cap'

member

15, through which extends the

spindle

5, is firmly secured to the upper end of the

nut

7 in such a manner that the

nut

7 may be rotated relatively to the

spindle

5 by turning the

member

15. Thus the heighth of the chair can be finger-touch adjusted by turning the

cap member

15. An adaptor collar 17, Which has a taper portion 20 corresponding to the taper lower end 14 of the

nut

7, is interposed between the

member

4 and the

nut

7. The aforementioned partially segmental splitting of the

nut

7 by means of the slots 11 and the taper portions 14 and 20 cause a clinching effect of the

nut

7 on the

spindle

5, due to the weight of the occupant of the chair as well as 'of those parts of the chair which are supported by

thespindle

5. Thus the

nut

7 will hold securely on the

spindle

5 and swivel with the

spindle

5, sodas to maintain a constant heighth of the chair, or allowing finger-touch adjustment by turning of the membeil15 as previously referred to. A screw 21, screwed through a lug. 22, which obliquely extends from the disk 2;:ehgags the annulargroove 10, so that the

parts

5, 371-15 and 17 cannot be separated from the

parts

1, 2 and 4 inadvertently. --1

iThe seat

23 of the chair is secured by any suitable means, for instance by means of screws 25 (Fig. 3) to a seat frame consisting preferably of a pair of

parallel angle bars

24, which have registering

slots

27. A swivel frame 30'has a pair 'of

angular portions

31 which are joined to each other by means of

cross portions

32 and 33';- The

spindle

5 extends from the

cross portion

33, to which it is firmly secured. The upper ends of the

angular portions

31 of the

swivel frame

30 are pivoted to the

angle bars

24 at 35. Two pairs of

link members

37. and 40 are'pivot'ed to the horizontal sections of the

angular portions

31 of the

frame

30 at 41 and 42 respectively. A substantially U-shaped

member

43, which Basia pair of

longitudinal flange portions

44 and a web portion 45' is mov'ably interposed with its 'flange portions 4.4 between :the 'bars24. -An up'right'member 47, which parries achair back 50, is firmly secured to the

web portion

45 of the

member

43 so as to form therewith an angular member. The upper ends of the

link members

40 are pivoted at 51 to the outer ends of the

flange portions

44, and a

fulcrum cross rod

53 is extended traversely through the

slots

27 in the

bars

24 as well as through the upper ends of the

link members

40 and the

flange portions

44 of the

member

43. Thus the

member

43, together with the

member

47 and the

back

50, has a forward and backward moveability independent of the

bars

24 and the

chair seat

23 attached thereto. Spacing members 55, such as washers or the like, preferably are interposed between the

bars

24 and the

members

37,

and the

rod

53 is slidable in the

slots

27. Thus the fulcrum of the

member

43, which is movable upwards and downwards as well as forwards and backwards, is pivotally attached to the

bars

24 by means ofthe

rod

53. J The

slots

27 allow an independent forward and backward movement while lowering or rising the chair seat, as may be seen in Figs. 1 and 2. 7 The

chair back

50 is attached by means of the

member

47 to the

member

43 about six inches back from the fulcrum, allowing sufficient leverage to drop the chair back 50 about one to one and one half inches more than the

seat

23 drops in recline. This gives a unison relation with the occupants back. Moreover, due to the slots 27in the

bars

24, the chair back 50 creeps forwardly in recline, hugging the occupants back with angular relation, and synchronizing all motions into one. To one side of the rim portion of a

disk

54 are secured a

pair oflugs

56, through which extends the

rod

53. To the center portion of the

disk

54 at the other side thereof is secured a

tubular adaptor member

57, which has an internally threaded portion 60 (Fig. 4). The

cross portion

33 of the swivel base has a threaded hole 61 through which is screwed the externally threaded

tubular portion

62 of a

hand wheel

63 for the adjustment of a coiled

spring

64. The

wheel

63 has a preferably cup-

shaped portion

66, which encompasses substantially a contour adjusting

circular dial member

67. To the center of the

member

67 is secured a threaded bolt 70, which extends through a second disk 71 and through a portion of the

spring

64, and is screwed into the threaded portion 60 of the

member

57. A portion of the

spring

64 encompasses the

member

57, and the chair is held upright by the force of the

spring

64 from the

cross portion

33 of the

frame

30 to the swinging

fulcrum rod

53.

The contour adjusting

dial member

67 is a specific feature of my invention. When the

member

67 is turned in one direction the

spring

64 is collapsed to any desired position, allowing the chair to assume any contour, which will remain relative to the posture for the occupant of the chair at any adjustment of axis location in relation to the hip axis of the occupant.

Since certain changes may be made in the above article and different embodiments of the invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are 7 intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention which as a matter of language might be said to fall therebetween.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent is:

1. In a chair of the character described, the combination of a pedestal, a threaded post extending upwardly from said pedestal, a swivel frame having a pair of angular portions joined to each other by cross portions one of which is secured to said post, a seat frame having a pair of parallel portions pivoted to the outer ends of the angular portions of said swivel frame and provided with registering longitudinal slots, a chair seat carried by said seat frame, a chair back, an angular member having two branch portions to the first of which said chair back is secured while the second is extended between the parallel portions of said seat frame, a fulcrum rod extending through the slots in said seat frame and through the second branch portion of said angular member, a first pair of link members pivotably connecting said fulcrum rod to the angular portions of said swivel frame to which said seat frame is secured, a second pair of link members pivotably connecting the angular portions of said swivel frame to the outer end of the said branch portion of said angular member, resilient means interposed between said swivel frame and said fulcrum rod tending to hold said chair back upright 1 and said seat in a horizontal position, and adjustable means for limiting the expansion movement of said re silient means.

2. In a tilting chair, the combination of a pedestal, a post extending upwardly from said pedestal, a swivel frame having a pair of angular portions joined to each other by crossportions one of which is secured to said post, a seat frame having a pair of parallel portions pivoted to the outer ends of the angular portions of said swivel frame and provided with registering longitudinal slots, a chair seat carried by said seat frame, a chair back, an angular member having two branch portions to the first of which said chair back is secured while the second is extended between the parallel portions of said seat frame, a fulcrum rod extending through the slots in said seat frame and through the second branch portion of said angular member, a first pair of link members pivotably connecting said fulcrum rod to the angular portions of said swivel frame to which said seat frame is secured, a second pair of link members pivotably connecting the angular portions of said swivel frame to the outer end of the second branch portion of said angular member, resilient means interposed between said swivel frame and said fulcrum rod tending to hold said chair back upright and said seat horizontally, a hand wheel having an exteriorly threaded tubular portion screwed into a cross portion of said swivel frame, a threaded stem extending through the tubular portion of said hand Wheel, a circular operating member secured to one end of said stem, and an adaptor member pivoted to said fulcrum rod having a thread-ed portion into which said stem is screwed, so that the expansion movement of said resilient means can be adjusted by turning said hand wheel as well as by manipulating said threaded stem.

References Cited in the file of this patent UNITED STATES PATENTS 1,872,894 Collier et al Aug. 23, 1932 1,928,801 Uhl Oct. 3, 1933 2,321,385 Herold June 8, 1943 2,403,198 Sheldrick et a1 July 2, 1946 2,403,425 Bolens July 2, 1946 2,420,745 Harman May 20, 1947 2,447,601 Sengpiel Aug. 24, 1948 2,471,024 Cramer May 24, 1949 2,545,950 Fox Mar. 20, 1951

US582390A 1956-05-03 1956-05-03 Functional posture controller for chairs Expired - Lifetime US2859799A (en)

Priority Applications (3)

Application Number	Priority Date	Filing Date	Title
US582390A US2859799A (en)	1956-05-03	1956-05-03	Functional posture controller for chairs
GB14046/57A GB848092A (en)	1956-05-03	1957-05-02	Improvements in adjustable chairs
FR1174489D FR1174489A (en)	1956-05-03	1957-05-03	Armchair with tilting seat and backrest

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US582390A US2859799A (en)	1956-05-03	1956-05-03	Functional posture controller for chairs

Publications (1)

Publication Number	Publication Date
US2859799A true US2859799A (en)	1958-11-11

Family

ID=24328964

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
US582390A Expired - Lifetime US2859799A (en)	1956-05-03	1956-05-03	Functional posture controller for chairs