Chairs and seats – Movable bottom – Movable independently of back
Patent
1996-05-24
1998-07-21
Nelson, Jr., Milton
Chairs and seats
Movable bottom
Movable independently of back
29742338, 2974514, A47C 102, A47C 750
Patent
active
057825327
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to an arrangement in a chair, especially a chair for children, comprising a back rest, a chair seat and a foot support, said chair seat and foot support being attachable at adjustable levels above the foundation of the chair.
PRIOR ART
From NO 132.782 (Peter Opsvik) there is known a chair having two side members which at the bottom merge into a leg support and at the top carry a back rest connecting the upper portions of the side members, said side members at their inner surfaces being provided with tracks, wherein can be inserted the side edges of a seat plate and a foot plate, respectively, which plates thereby are given an optional height as well as an optional horizontal position in relation to said side members.
Such a chair can, due to its adjustability, be adapted to both small children, larger children and even to adult persons, i.e. cover a sitting requirement throughout the overall adolescence of a person.
In order to adjust the seat plate and the foot plate, however, there is a need for using both hands, at the same time as the plates cannot be pulled out from the side members and be inserted into a new position before specific attachment or locking means between the side members have been released, especially by means of tools.
From NO 126.294 (Peter Opsvik) there is further known an arrangement in a chair of the type comprising a seat plate and a back plate which optionally in a height adjustable manner can be attached to supporting pillars extending from a leg base, said back plate and seat plate being displaceable along portions forming an obtuse angle in relation to each other. However, the cusp of the angle faces forwardly of the chair, and the supporting pillars comprise parallelly running pipe posts to which the back plate and seat plate, respectively, are attached at their side edges. It is true that an alteration of the seat depth can be achieved in relation to the back rest, but that requires a mutual regulation of the back rest and the seat plate, at the same time as the adjustment requires the use of both hands and comprises the loosening of fastening bolts at respective side portions of the seat plate and back plate. Besides, this prior art chair comprises no foot support which can be regulated in relation to the seat plate, which involves that the user of the chair must obtain support for his feet at floor level, which for small persons entails that they can not reach to normal table height.
From NO 150.743 (Eknes) there is known an adjustable chair, especially a chair for children, comprising a chair seat and a foot support which can be adjusted along a chair member extending upwardly and rearwardly in a slanting manner, through a supporting sleeve with associated stopper means, said chair seat and foot support being kept in place in selected position due to the stopper means under the influence of the weight of the chair seat and foot rest, respectively, as well as the load being imposed thereupon.
However, the chair member extending upwardly and rearwardly in a slanting manner is contemplated to be implemented only as two pipe-shaped front chair legs which together with the rear leg pairs of the chair constitute four legs requiring unnecessary space in relation to the foundation of the chair. Further, there are provided supporting sleeves and stopper means for the chair seat and foot rest, respectively, on each of the front legs, which during the adjustment operation will be subjected to wedging during upwardly or downwardly regulation. Such a chair also requires free access from the front in order to allow a child or an underaged to reach the seat via the foot support, which in turn requires that the chair must be pulled completely back from the table in order to give a step function. If the underaged should try to climb the chair from the side, via the foot support, this would be very difficult, at the same time as there exists a danger of tilting the chair. Besides, the foot support is very small in relation to the sea
REFERENCES:
patent: 573133 (1896-12-01), Browne
patent: 2542480 (1951-02-01), Cramer et al.
patent: 3625563 (1971-12-01), Dickeinson et al.
patent: 4109961 (1978-08-01), Opsvik
patent: 4712835 (1987-12-01), Volkle
patent: 4767160 (1988-08-01), Mengshoel et al.
patent: 4768831 (1988-09-01), Liedberg et al.
patent: 4793655 (1988-12-01), Kralheim
patent: 4832407 (1989-05-01), Serber
patent: 4960305 (1990-10-01), Opsvik
patent: 5328240 (1994-07-01), Neumuller
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