Chairs and seats – With means to control rearward chair tipping
Patent
1993-06-21
1996-02-13
Brown, Peter R.
Chairs and seats
With means to control rearward chair tipping
2972581, 2973024, 2972701, A47C 302
Patent
active
054907152
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to an arrangement in a chair.
The present arrangement is adaptable to all types of chairs, but will have a specific application within the category of chairs comprising so-called conference chairs, dining-room chairs and working chairs.
PRIOR ART
U.S. Pat. No. 2,244,614 (Fox) relates to a rocking chair in which there is allowed an even rocking movement, especially by means of further springs. Said springs are located between curved strips attached to the seat frame and supporting rails, but do not allow for the possibility for moving the chair itself in the vertical direction, let alone in any sideways directions. Further, the rocking chair according to U.S. Pat. No. 2,244,614 is based on the principle of having an arched runner as basis for the rocking movement.
U.S. Pat. No. 3,368,843 (Caldemeyer) also relates to a rocking chair in which the rocking movement itself is based on arched side rails. Apart from suggesting a specific type of arched runners, this patent publication does not suggest a chair allowing a combined vertical movement and rocking movement.
U.S. Pat. No. 4,372,606 (Faull) suggests a specific type of rocking chair, in which a plurality of springs are located between two plates, there being between said plates provided a plurality of pipes keeping the two plates at a specific distance at the central area thereof. Since at least two such pipes must be provided, there will only be allowed movement in the "rocking" direction, which means that the prior art structure exclude a combined movement in the vertical plane as well as sideways tilting of the chair.
FR 914 419 (Nystrom) also relates to a specific type of rocking chair, but neither does this prior art chair allow any movement in the vertical plane or any sideways movement of the chair.
NO 156.634 (Kjersem) discloses so-called tilting runners for being mounted in pairs on the base of a chair, such runners allowing a tilting of the chair for thereby altering the angle of the seat member in relation to a horizontal plane. However, according to this publication there is no suggestions as to means allowing for a floating or heaving movement of the chair in question.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an arrangement in a chair, which allows the chair to "yield" in all directions, which thereby should provide a floating or heaving or even air-walking movement when the user takes her or his various chair sitting positions.
A further object of the present invention is in such a chair with expanded liberty of movement, to limit the soft movements of the chair for thereby rendering stabile maximum forwardly tilting and rearwardly tilting positions, respectively.
A still further object of the present invention is to provide an arrangement in a chair that may be mass-produced at a low cost in respect to both material and labour.
Yet another object of the present invention is to provide an arrangement in a chair which in a non-expensive and efficient manner can be included in not only novel chair designs, but also in existing chair designs.
These objects are achieved in an arrangement as stated in the preamble, which according to the present invention is characterized in that the chair comprises one or more resilient elements redering the chair freedom of movement in both vertical and side-wise directions, as well as in forward and rearward directions.
Said one ore more resilient element(s) may appropriately constitute the only connection between the chair seat member and a chair supporting member or floor supporting member.
Further, such resilient elements may for example be implemented as for example helical springs, rubber elements, plastic elements, laminates, air pillows, etc, or a combination thereof.
Still further, said resilient elements may be located as far down on the chair as possible.
Alternatively, said resilient elements may be located just below the chair seat member.
Accordingly, the objects are achieved in an arrangement in a chair, w
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