Beds – Sofa bed – Reverting back
Patent
1985-04-16
1987-06-30
Grosz, Alexander
Beds
Sofa bed
Reverting back
5 60, 74606R, A61G 700
Patent
active
046759263
DESCRIPTION:
BRIEF SUMMARY
FIELD OF INVENTION AND PRIOR ART
This invention relates to a chair and/or bed arrangement of the kind defined in the preamble of appendant claim 1.
Such an arrangement is disclosed in U.S. Pat. No. 3,593,350. The frame therein consists of a lathwork formed by longitudinal and transversal beams. Power exerting devices and a large number of links and the like for attaining the desired adjustability are secured to the transversal beams. Chairs or beds of this kind are primarily used within the medical sector, for what reason the requirements as to hygiene as a rule are high. Thus, the chairs and beds must be cleaned with regular intervals. The cleaning work in connection with the bed in the US patent is tiresome to say the least due to the large number of operating components being entirely exposed in the frame. Careless cleaning may easily lead to operating disturbances of the exposed motors, in particular if they are of electrical type. Automatical cleaning procedures can probably hardly be applied in connection with the prior art bed.
SUMMARY OF THE INVENTION
The object of the invention is to reduce the deficiencies discussed hereinabove and achieve a chair and/or bed arrangement having a form and design as simple as possible at the same time as cleaning must be possible to carry out rapidly without jeopardizing the result.
This object is obtained according to the invention in that the frame is designed as a container generally closed at all sides, said power exerting devices being housed within said container, and that pivot shafts for the operating members, which are designed as pivot arms, extend into the interior of the container through wall portions thereof. In this way an embodiment is obtained which to a maximum extent makes it possible to house operating components within the frame. The cleaning work will thereby generally be restricted to flat surfaces with a minimum of areas difficult to reach.
BRIEF DESCRIPTION OF THE DRAWINGS
With reference to the appended drawing, a more specific description of an embodiment example of the invention will follow hereinafter.
In the drawings
FIGS. 1-3 are side views of the arrangement in three different positions of use;
FIG. 4 is a diagrammatical longitudinal section through the frame as viewed in a position corresponding to FIG. 3;
FIG. 5 is a cross section as viewed along the line V--V in FIG. 4; and
FIG. 6 is a longitudinal section illustrating an alternative embodiment.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
The arrangement according to the invention will hereinbelow be described as primarily functioning as a bed. However, it should be noted that the invention as well can be applied in connection with arrangements having as primary task to function as a chair.
The bed comprises a base 1, which may be provided with wheels to simplify transport, and a frame in the form of a girder 2, which is vertically adjustable relative to the base by means of first operating members 3. The operating members are formed by two pairs of pivot arms 3. The two pivot arms in each individual pair extend in a spaced parallel relation and are non-rotatably connected to each other at one of their ends by means of a shaft 4. The other ends of the pivot arms 3 are via shafts 5 pivotably connected to longitudinal and parallel beams 6 arranged at a distance from each other in the base 1. The pivot shafts 4 of the two pairs of pivot arms and the shafts 5 form a parallelogram.
The lying surface of the bed is formed by a back member 7, a seat member 8 and a leg member 9, which are connected to each other via hinges 10 and 11 respectively. Additional operating members in the form of two pairs of pivot arms 12, 13 serve for adjustment of members 7-9. Each of the pivot arms in these two pairs are, as is indicated in FIG. 5 concerning the arms 13, non-rotatably connected at one or their ends to the opposite ends of a pivot shaft 14 while the arms extend in parallel. The pivot shaft 15 connecting the pivot arms 12 is indicated in FIG. 4. The pivot arms 12 are adapted to a
REFERENCES:
patent: 646467 (1900-04-01), Short
patent: 2564083 (1951-08-01), Stechert
patent: 2996732 (1961-08-01), Draper
patent: 3593350 (1971-07-01), Knight et al.
patent: 3644945 (1972-02-01), Goodman et al.
patent: 4120057 (1978-10-01), Neumann
patent: 4345344 (1982-08-01), Gadoury et al.
Bergling Thomas
Lindblom Hans-Olov
Brown Charles A.
Brown Charles E.
Grosz Alexander
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