Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS2851086 A
Publication typeGrant
Publication dateSep 9, 1958
Filing dateSep 20, 1955
Priority dateSep 20, 1955
Publication numberUS 2851086 A, US 2851086A, US-A-2851086, US2851086 A, US2851086A
InventorsMeyer C Weiner
Original AssigneeMeyer C Weiner
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Lock for folding chairs
US 2851086 A
Images(2)
Previous page
Next page
Description  (OCR text may contain errors)

Se pt.9,1958 mcwgma v 2,851,086

' LOCK-FOR FOLDING CHAIRS Filed Sept. 20, 1955 2 Sheets-Sheet 1 Meyer C. we) er Afforney P 1958 M. c. WElNER 2,851,086

LOCK FOR FOLDING CHAIRS Filed Sept. 20, 1955 2 Sheets-Sheet 2 J I L-292 v /;g. I Make! C. We/her" I: Y-

" Affomev;

United Stae This invention relates to the construction of folding chairs, and has .been developed primarily to cope with the problems present in the adaptation of a folding mechanism to childrens highchairs. The notorious tendency for children to occupy chairs in strange attitudes,- and to shift their weight continually and with violence from one part of the chair to the other makes it imperative that the folding mechanism be designed to accommodate such conditions without establishing any tendency to move the chair toward the folded condition, or to otherwise endanger the occupant. In additionto the unpredictable behavior of the occupant of the chair, outside forces are often brought to bear which must be accounted for in the design of the mechanism. It is often desirable/to drag an occupied chair across the floor from one part of'the room totheother, and such a maneuver will apply substantial forces to the legs and folding linkage which are very difficult topredict. The chair can be moved in such a fashion that the principal portion of the weight is supported in an almost endless variety of weight-distribution combinations between the several legs, and any mechanical linkage is normally quite sensitive in its behavior to the direction of applied forces with respect to the pivot points. A folding chair mechanism of conventional type which will accommodate all of these unpredictable conditions Without disturbing the stability of the chair would be most remarkable; and if available at all, would carry with it the likelihood of prohibitive cost.

In view of the difficulty of designing a mechanism which would, in and of itself, accommodate all of the infinite changes in condition to which the chair is subjected, applicant has discovered a system which can be incorporated in a relatively conventional folding chair mechanism which will adequately lock the structure in the erected condition so that no amount of mistreatment will serve to move the chair toward a folded or otherwise unstable position.

The several features of the invention will be analyzed in detail through a discussion of the particular embodiments illustrated in the accompanying drawings. In the drawings:

Figure 1 presents a perspective view in side elevation of a chair embodying this invention.

Figure 2 presents a perspective view of the same chair in the folded condition.

Figure 3 shows a fragmentary view on an enlarged scale of the locking mechanism, as seen directly from the rear.

Referring to the drawings, the illustrated chair includes a back unit composed of an upholstered section and a pair of opposite arms 11 which are each attached to the lower part of the upholstered unit and extend downwardly in a curved configuration. The lower part of each of the arms 11 is pivotally connected at 12 to the seat unit 13. Opposite arm rests 14 are pivotally connected to the upper end of the arms 11 at points as indicated at 15 in Figure 1.

The front legs 16 and 17 are each pivotally connected atent O "ice shown at 24, with the opposite ends being connected to the arms 11 at the abutments 25. The construction of the abutments is best indicatedin Figure 3, and includes a bolt 26fitted with a suitable spacingwasher 27,

and with a resilient tubular member 29 forabsorbing the shock as the rear legs comeinto engagement therewith. The nut 30 completes the assembly,.and .it should be observed that the abutment 25 is positioned-so thatit limits the rearwardswing of the rear legs about thepivot points 22 with respect to the backand seat. When the chair is in the erectcondition, the upholstered-unit 10 and .theseat unit 13 have a relativelyfixed relationship, and

cant has provided a latch in the form of a. hook-shaped member 31 pivotally connected to eachof the. rear legs at the point indicated at'32. The lower extremity 33 (see Figure 3) of the hook member 31 engages the abutment 25 when the chair is in erect position. Such engagement securely locks the folding action of the chair, since it is no longer possible for the rear legs 20 and 21 to move forwardly with respect to the seat away from the abutment 25. The upper portion of the hook member 31 may be formed in some convenient fashion to provide an effective grip for engagement of the finger to facilitate the unlocking of the chair prior to folding it. i

A tray 34 is mounted on the arms 14 with a conventional positioning adjustment mechanism generally indicated at 35. A foot rest panel 36 is mounted on brackets 37 having an adjustable clamping action determined by the tightness of the screw 38 which will permit positioning of the foot rest at adjustable vertical locations. A portion 39 of the brackets 37 surrounds the legs in the manner of a collar, and tightening of the screw 38 serves to constrict the portion 39 and establish the necessary clamping action. The foot rest 36 is preferably secured to the brackets 37 by a single fastening as shown at 40 in Figure 1, so that the vertical movement of the foot rest assembly (accompanied by angular movements of the brackets 3'7 about the fastening 40 as a result of the divergence of the legs) may be freely accommodated by the radially-extending arm portions of the brackets 37 without necessity of removing or re-locating fastenings.

Conventional cross-braces are provided as shown at 41 on the front legs and 42 on the rear legs to provide added strength and to avoid over-loading the various pivot connections. The strap 43 is conventional, and is installed to prevent the infant from sliding downward and out of the chair underneath the tray 34.

The particular embodiments of the present invention which have been illustrated and discussed herein are for illustrative purposes only and are not to be considered as a limitation upon the scope of the appended claims. In these claims, it is my intent to claim the entire invention disclosed herein, except as I am limited by the prior art.

I claim:

1. In a folding chair having a seat, a back pivotally prising: abutment means substantially fixed with respect" to said back when said chair is in the erected condition, said abutment means being disposed to limit the rotation of said rear legs to the rear with respect to said back; and disengageable latch means for interconnecting said rear legs respectively to said abutment means when said chair is in the erected condition.

2. In a folding chair having a seat, a back pivotally connected to said seat, arm rests pivotally connected to said back, front legs pivotally connected to said seat andto said arm rests respectively, rear legs pivotally connected at the upper end thereof to said arm rests, and a link connecting each of said rear legs respectively to a member substantially fixed with respect to said back when said chair is in the erected condition, the improvement comprising: abutment means substantially fixed with respect to said back when said chair is in the erected condition, said abutment means being disposed to limit the rotation of said rear legs to the rear with respect to said back; and disengageable latch means for interconnecting said rear legs respectively to a point substantially fixed with respect to said backwhen said chair is in the erected condition.

3. In a folding chair having a seat, a back pivotally connected to said seat, arm rests pivotally connected to said back, front legs pivotally connected to said seat and to said arm rests respectively, rear legs pivotally connected at the upper end thereof to said arm rests, and a link connecting each of said rear legs respectively to a member substantially fixed with respect to said back when said chair is in the erected condition, the improvement comprising: abutment means substantially fixed with respect to said back when said chair is in the erected condition, said abutment means being disposed to limit the rotation of said rear legs with respect to said back; and disengageable latch means for interconnecting a rear leg and said abutment means when said chair is in the erected condition.

4. In a folding chair having a seat, a back pivotally connected to said seat, arm rests pivotally connected to said back, front legs pivotally connected to said seat and to said arm rests respectively, rear legs pivotally connected at the upper end thereof to said arm rests, and a link connecting each of said rear legs respectively to a member substantially fixed with respect to said back when said chair is in the erected condition, the improvement comprising: abutment means substantially fixed with respect to said back when said chair is in the erected condition, said abutment means being disposed to limit the rotation of said rear legs with respect to said back; and disengageable latch means for interconnecting a rear leg and a point substantially fixed with respect to said back when said chair is in the erected condition.

References Cited in the file of this patent UNITED STATES PATENTS 238,708 Parker Mar. 8, 1881 388,981 La Barbe Sept. 4, 1888 390,801 Parker Oct. 9, 1888 1,683,327 Bouharoun Sept. 4, 1928 2,599,164 Cudini June 3, 1952 2,652,098 Nordmark Sept. 15, 1953 2,705,043 Hoven Mar. 29, 1955

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US238708 *Dec 10, 1880Mar 8, 1881Philakdee DeebyFbank f
US388981 *Jan 9, 1888Sep 4, 1888 Foot-rest for stools
US390801 *Jul 2, 1888Oct 9, 1888 Foot-rest for chairs
US1683327 *Oct 25, 1927Sep 4, 1928Bouharoun Sliman EFolding chair
US2599164 *Aug 13, 1947Jun 3, 1952Moynahan Bronze CompanyFolding chair
US2652098 *Aug 25, 1951Sep 15, 1953American Seating CoFolding chair
US2705043 *Jul 6, 1954Mar 29, 1955American Seating CoFolding chairs
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3319997 *Sep 2, 1965May 16, 1967Napoleon ClementLocking device for folding chair
US3330597 *Mar 28, 1966Jul 11, 1967Hamilton Cosco IncHigh chair
US3334909 *Jan 6, 1967Aug 8, 1967Strolee Of California IncConvertible stroller apparatus
US3345105 *Mar 3, 1966Oct 3, 1967Union Carbide CorpFoldable chair
US3575466 *Oct 31, 1968Apr 20, 1971Edwards Donald WGeriatric chair
US4580833 *Nov 16, 1984Apr 8, 1986The Quaker Oats CompanySafety lock for a folding high chair
US4603902 *Feb 21, 1984Aug 5, 1986Cosco, Inc.Foldable high chair
US4613185 *Aug 15, 1984Sep 23, 1986Icu Intercommerz Union S.A.Folding chair
US4626030 *Aug 16, 1985Dec 2, 1986Aprica Kassai KabushikikaishaBaby carriage
US4711487 *Jul 2, 1985Dec 8, 1987Norman D. KoernerEvacuation chair
US4963762 *Oct 23, 1987Oct 16, 1990Norman D. KoernerEvacuation chair
US6293623 *Sep 25, 1998Sep 25, 2001Cosco Management, Inc.Juvenile seat assembly
US7128367 *Sep 27, 2004Oct 31, 2006Link Treasure LimitedFoldable highchair framework
US7490895 *Dec 12, 2005Feb 17, 2009Link Treasure LimitedHigh chair with collapsible frame
DE1031156B *Feb 23, 1953May 29, 1958Marcel LenoirVorrichtung zum Demontieren und Montieren von Luftreifen auf die Radfelge
DE3540642A1 *Nov 15, 1985May 22, 1986Quaker Oats CoSicherheitsbeschlag fuer einen zusammenfaltbaren hochstuhl
Classifications
U.S. Classification297/39, 297/423.38, 297/149
International ClassificationA47D1/00, A47D1/02
Cooperative ClassificationA47D1/008, A47D1/02
European ClassificationA47D1/02, A47D1/00E