US3773383A - Readjustable chair - Google Patents

Abstract

Readjustable chair of the kind where a seat and a back are hinge connected to each other, and are supported on a leg subframe work such that the mutual angular position of the seat and back may be altered. Two rigidly fixed supports are provided on each side of the chair, raising from the leg subframe work, and which can carry arm rests. The back of the chair is pivoted to the back support. The seat is fixed to the other support by a pair of slidable and fixable slide shoes.

Description

United States Patent 1 1 14 1 Nov. 20, 1973 Ekornes READJUSTABLE CHAIR 3,337,266 8/1967 Burns 297 342 x I3 27 9 4 [76] Inventor: Jostein Ekornes,6222 Ikornes, 6/1 6 oven 297/422 X Norway FOREIGN PATENTS OR APPLICATIONS Filed Oct 28 1971 154,892 l/1954 Australia 297/320 [21] Appl. No.: 193,430 Primary Examiner-Francis K. Zugel Attorney-Nolte et al. [30] Foreign Application Priority Data Oct. 29, 1970 Norway 4125/70 [57] ABSTRACT Read ustable chair of the kmd where a seat and a back 52 us. c1. 297/320 297/342 are hinge each her, and s"Ppmed I 51 1 int Cl. l r U032 on a leg subframe work such that the mutual angular 58 Field o1a;;i..I.II..........II..I 257/542 320 317 the and back my be altered- 297/343 5 idly fixed supports are provided on each side of the chair, raising from the leg subframe work, and which The back of the chair is pivoted [56] References Cited can carry arm rests to the back support. The seat 1s fixed to the other sup- UNITED STATES PATENTS port by a pair of slidable and fixable slide shoes. 2,400,588 5/1946 McArthur 297/320 X 809,944 I/l906 I-Iunger 297 342 3 Claims, 2 Drawing F lgul'es 2,617,471 11/1952 Lorenz 297/342 X where the back is mounted pivotally on to the rear of the said supports.

A series of types of such chairs are previously known, where the back and seat are suspended on the frame work or supported by this in such a way that the two said main parts may be brought to adopt the preferred mutual angular position.

' To obtain this plus the fixing in a wanted position, it has been proposed different mechanical means, springs for balancing of forces and weights etc. Such previous constructions have, in other words, been relatively complicated and thus expensive to manufacture. Such constructions have also often been'liable to the essential disadvantage, that the placing of the construction parts has made possible wedging and damage to the fingers during readjustment of the chair.

The invention aims at providing a readjustable chair of unusual simple construction which is easy to adjust and by its way of construction does not contain any details which make wedging' possible.

According to the invention, it is proposed that a chair according to the previous mentioned, is designed such that the seat by slidable and fixable slide shoes along the frontmost of the said supports, may be fixed to these supports.

For better understanding of the invention, it will be further described in the following with a reference to the two embodyments which are shown shematically on the drawings.

FIG. 1 shows an initial embodyment of a chair according to the invention, in an almost stretched position respectively in a position with a rected back.

'FIG. 2 shows a somewhat modified version in' the same two positions as mentioned in FIG. 1.

In FIG. 1, 1 indicates the frame upon which the cushion for the back rests and 2 the frame upon which the cushion for the seat rests. The cushion may, if desired, be designed as one cushion or be detachable, separate cushions. The two frames 1 and 2 are hinge connected to each other by trunnions 3 and may thus adopt varying angular positions with regard to each other.

Upright supports 4a, 4b, which at the upper end pass into arm rests 4c, are arranged on each side from a suitable leg subframe work, in the shown case a base plate 8 an upright column 7 from the said base plate. Additional arm rest cushions or similar may be fixed to the part 40, if desired.

Lower part of the frame for the back is pivotally suspended to the rear, tilted upright supports 4b, as shown b 5.

The frame 2 for the seat is connected to the front,

tilted upward running supports 4a by means of movable slide shoes aquipped with a lock wheel or similar. This detail is indicated by 6.

As will be understood, the movable parts of the chair may swing about the suspension 5, as the slide shoes 6 then slide along the tilted, upward going supports 4a. When the chair is brought into the wanted position, the wheel for the slide shoe is taken up, and the chair is then secured in the required position. As will be seen, a minimum of constructive details has been used, and movement with fixing is obtained by simple and safe means which can be manufactured at low cost.

In FIG. 1, the slide shoe with attached fixing lock wheel will move along the tilted supports 4a and consequently have variable distance from the arm rest 40. The chair may be arranged as indicated in FIG. 2, if it is preferred that this distance does not vary, which may be practical since the arms usually rest more or less against the arm rests 4c. 6a indicates a moveable slide shoe, while 6b indicates a stationary slide shoe equipped with a lock wheel, since it here is provided a guide by means of a tube 9 fixed to the upper slide shoe By the readjustable chair described above, one may easily control the position of the chair, i.e., the mutual position between the back and seat, only just by suitable weight transfer of the body, and fixing in the wanted position is done by the described easy means. All readjustments may thus be done while one sits in the chair, and no details exist which may initiate wedging of fingers, clothes and similar. The construction is simple, and no disfiguring parts are present.

I claim:

l. Readjustable chair of the kind where the seat and the back are hinge connected to each other and where these parts are supported on a leg subframe work such that the mutual angular position of the seat and back may be altered as required, and where rigidly fixed rear and front supports on each side of the chair rise from the leg subframe work, said supports at the upper end carrying or passing into arm rests, and where the back is mounted pivotally on to the rear supports, characterized in that the seat and front supports are connected via slide shoes fixedly attached to said seat a predetermined distance from the hinge connection between said seat and back and to said front supports via means for sliding therealong, said slide shoes including means for securing andreleasing the same along said front support, said front support extending in an upward, forward path from the leg subframe work.

2. Chair according to claim 1, characterized by that a guide is entered in the connection between the seat and the front supports.

3. A chair according to claim 1 wherein said slide shoes and means for securing and releasing the same along said front support comprise means for varying friction between said front supports and said shoes and for locking said supports and said shoes in fixed relation.

Claims (3)

1. Readjustable chair of the kind where the seat and the back are hinge connected to each other and where these parts are supported on a leg subframe work such that the mutual angular position of the seat and back may be altered as required, and where rigidly fixed rear and front supports on each side of the chair rise from the leg subframe work, said supports at the upper end carrying or passing into arm rests, and where the back is mounted pivotally on to the rear supports, characterized in that the seat and front supports are connected via slide shoes fixedly attached to said seat a predetermined distance from the hinge connection between said seat and back and to said front supports via means for sliding therealong, said slide shoes including means for securing and releasing the same along said front support, said front support extending in an upward, forward path from the leg subframe work.

2. Chair according to claim 1, characterized by that a guide is entered in the connection between the seat and the front supports.

3. A chair according to claim 1 wherein said slide shoes and means for securing and releasing the same along said front support comprise means for varying friction between said front supports and said shoes and for locking said supports and said shoes in fixed relation.

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