Horizontally supported planar surfaces – Tiltable surfaces – Sectional
Patent
1991-03-21
1993-04-06
Chen, Jose V.
Horizontally supported planar surfaces
Tiltable surfaces
Sectional
108 1, 108 6, A47F 512
Patent
active
051993600
DESCRIPTION:
BRIEF SUMMARY
The present invention refers to an improvement in table constructions.
Recently table constructions have been suggested in which one or several table tops are so connected to a table stand that they can be inclined to form desk-like units or sections. This depends upon the knowledge about the reaction of the human body to different positions of work.
However, these known table constructions have only partly been able to fulfill the requirements which such knowledge raises upon work tables.
For instance it has not been possible without complicated, heavy and expensive constructions to produce work tables which are suited for work in a sitting as well as a standing position. The stability has in most cases been unsatisfactory.
Another drawback with the solutions presented is that in most cases it has been necessary to use bulky structures with downwardly extending parts which encroach upon the space for the legs and which may cause damages to the knees of the user.
The object of the invention has thus been to provide a table construction of the kind referred to which does not suffer the mentioned drawbacks and which may be produced at a low cost.
In order to accomplish these and other objects the invention has the characteristics which appear from the patent claims.
The accompanying drawings illustrate an exemplary embodiment of the invention in which
FIG. 1 is a schematic side view of a table construction according to the invention and set for work in a sitting position.
FIG. 2 is a similar illustration but with the table construction set for work in a standing position.
FIG. 3 shows in perspective and on an enlarged scale part of a unit forming part of the table construction while
FIG. 4 also in perspective shows certain of the parts which form part of the unit according to FIG. 3 and
FIG. 5, finally in perspective shows a part of FIG. 4.
The new table construction comprises a base frame generally designated as 1, which may be of any suitable kind and is here illustrated by means of a table stand which consists of a rectangular frame 2 supported by a number of legs 3. The parts of the table constructions may be connected to such a base frame but in the embodiment to be described in connection with FIGS. 3-5 inclusive the majority of said parts are assembled to a unit which in an easy manner may be connected to a base frame such as a table stand. The advantage with such units is of course that they may be fully produced at a factory and then rapidly and with a minimum of effort may be built in already manufactured furniture or furniture stands.
As appears from FIGS. 1 and 2 a first table top 4 is hingedly connected to the front edge of a table stand 1 by means of a hinge 5. Said first table top is in turn by means of a hinge 6 hingedly connected to a second table top 7. The latter has at the lower surface thereof bearings 8 for a pivot shaft 9, by means of which a link 10 is pivotally connected to the table top 7. The link 10 is at the opposite end thereof at 11 pivotally connected to the table stand and the pivot shafts are so chosen that the table tops 4 and 7 and the link and the part of the base frame which is located between the pivot points 5 and 11 together will form a parallel link system.
Pivotally connected to the link 10 at 12 is a catch arm 13 which in combination with a catch means 14 connected to the base frame can bring forth a locking of the link 10 and consequently the entire parallel link system in various angular positions.
As appears from FIG. 5 the catch arm 13 near to one end thereof has projections 15 extending therefrom in opposite directions and which may consist of a dowel which penetrates the arm and is secured thereto for instance by a press fit and a support arm 16 (FIG. 3) is also pivotally mounted about the same axis as the catch arm 13.
As initially mentioned most of the components of the device are assembled to a unit which is partly shown in FIG. 3 and there has the general designation 17.
This unit comprises a channel bar 18 which preferably bridges the distance between tw
REFERENCES:
patent: 8486 (1851-11-01), Hammitt
patent: 133087 (1872-11-01), Dummer
patent: 173706 (1876-02-01), Woolson
patent: 2623435 (1952-12-01), Geis
patent: 2843226 (1958-07-01), Nordmark
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