Supports – Stand – Understructure
Patent
1989-11-07
1991-10-29
Purol, David M.
Supports
Stand
Understructure
297345, F16M 1124
Patent
active
050608967
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a furniture adjustment device, particularly though not exclusively for use in adjusting the seat height of a child's chair.
BACKGROUND OF THE INVENTION
Childrens high chairs are well known, not only the type incorporating a tray for support of the child's plates, but also the type which are in effect long legged chairs. With the latter type, a child sits at a table in the normal way but lifted up to a height suitable for the child to eat comfortably from a plate on the table. In due course a child grows out of his high chair and yet is too small to sit comfortably on an ordinary chair.
At this stage the child is often sat on a cushion on an ordinary chair to lift him to a suitable height. However, this is seldom a convenient arrangement, in particular because the cushion tends to push the child too far forward or back, and the cushion may slip onto the floor. Also the cushion usually gets dirty from the child's sticky fingers.
British patent specification No. 971,253 describes an adjustable seat for a child for use in a car. It has telescopically adjustable legs for adjusting the height in the car at which the child is seated. However such telescopic adjustment is provided as an integral part of the seat. Telescopic adjustment cannot readily be introduced into an existing chair, which may have legs with a widely varying diameter and cross-section.
British patent specification No. 1,461,588 describes an adjustable furniture support which comprises upright members for housing wooden blocks on which rest the legs of a piece of furniture to be moved. The support is not connected to the piece of furniture in any permanent manner, rendering it unsuitable for a chair which is to be moved regularly.
THE INVENTION
The object of the present invention is to provide a device with which the height of an ordinary chair can be adjusted upwards leaving the chair readily movable, for instance for supporting a young child at a height convenient for the child to eat comfortably and to be moved into the table as necessary.
A furniture adjustment device of the invention comprises a plurality of leg extenders, each leg extender having an elongate leg extension member and a support intermediate its ends for supporting the bottom end of a furniture leg to extend it by the distance in the extender from the support to a lower end of the leg extension member; each leg extender further comprising a clamp for clamping the leg extension member to the leg above the support to secure the extender to the leg.
Each support may be fixed permanently to its extender, preferably eccentric to its length, whereby a different degree of seat height adjustment is achieved according to which way up the extender is arranged. Alternatively, as preferred, each support is adjustable along its extender, conveniently between discrete positions.
Preferably each leg extension member has a plurality of laterally open recesses providing the discrete positions and spaced along its length and its support has at least one tongue for engagement in a selected one of the recesses. Each extender may include a locking member laterally retained on and axially slidable along its leg extension member into discrete positions corresponding to the discrete positions of the recesses for restraining lateral movement of its support and withdrawable therefrom for disengagement of the tongue(s) from the selected recess(es).
THE DRAWINGS
To help understanding of my invention a specific embodiment thereof will now be described by way of example with reference to the accompanying drawings:
FIG. 1 is a perspective view of a chair having a furniture adjustment device of the invention fitted to it;
FIG. 2 is a cross-sectional side view of a leg extender of the invention, the cross-section being on the line II--II in FIG. 3;
FIG. 3 is a top plan view on the direction of the arrow III in FIG. 2;
FIG. 4 is a cross-sectional plan view on the line IV--IV in FIG. 2;
FIG. 5 is a cross-sectional plan view on the line V--V in F
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patent: 2107629 (1938-02-01), Dallas
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patent: 2941329 (1960-06-01), Apparius
patent: 3177035 (1965-04-01), Halstrick
patent: 4607726 (1986-08-01), Davis et al.
patent: 4807720 (1989-02-01), Kim
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