Chairs and seats – Movable bottom – Independently movable resilient bottom sections
Patent
1993-05-06
1995-04-11
Brown, Peter R.
Chairs and seats
Movable bottom
Independently movable resilient bottom sections
297331, 29734419, 29734421, 29745239, 5 811, 5 861, A61G 500
Patent
active
054051878
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a wheelchair for the handicapped, comprising a frame structure which is carried by chair-rolling devices and which supports a chair seat.
It is known that handicapped people find it difficult to climb from their bed into a wheelchair and to climb from the wheelchair onto a toilet or water closet. In the case of younger people with well-developed muscles, this problem is overcome relatively easily for a number of years, although with time the shoulder muscles of the person concerned are liable to become strained and tired therewith often requiring the assistance of a nurse or like attendant, particularly as the weight of the handicapped person increases.
The present invention relates to a wheelchair which provides a solution to the aforesaid problem and enables handicapped persons to move into and from the wheelchair without appreciable effort.
The invention thus relates to a wheelchair for the handicapped, comprising a frame structure which is carried by chair-rolling devices and which, in turn, carries a seat and back-supporting means.
The wheelchair is mainly characterized in that the seat is divided in its longitudinal direction, preferably along a centre line, and is so journalled to the frame structure that the separate parts of the seat can be swung out on respective sides of the frame, independently of one another.
The invention will now be described in more detail with reference to an exemplifying embodiment thereof and also with reference to the accompanying drawings, in which
FIG. 1 is a vertical, central longitudinal section view through a first embodiment of an inventive wheelchair whose frame structure is constructed so as to enable the chair to be moved over a bed while enabling, at the same time, part of the chair to be inserted beneath the bed;
FIG. 2 illustrates the wheelchair of FIG. 1 in perspective;
FIG. 3 illustrates the wheelchair shown in FIG. 1 seen from above in said Figure and shows the seat members in a fully outwardly swung position, and also shows in broken lines the seat members in a fully combined position and a partially outwardly swung position;
FIG. 4 illustrates the wheelchair of FIG. 1 seen from the left in said Figure, and shows the seat with both seat members positioned at mutually the same height; and
FIG. 5 illustrates the wheelchair of FIG. 4, with one seat member raised above the other.
FIG. 6 illustrates a partial front view showing seat and hinge components illustrating the obliquely positioned hinged axes.
Shown in FIG. 1 is a frame structure 1 of which one-half is shown in the Figure and of which each half includes a vertical part 2 which is connected to a substantially horizontal lower part 3 supported on casters 4. A moveable periscope-like part 5 of the vertical frame part 2, such as a tubular part 5, is connected to a substantially horizontal upper frame part 6, which is pivotally connected to a seat member 9 forming part of the seat 8 of the wheelchair by means of appropriate hinge devices 7. The seat member 9 is, in turn, connected to a back-support member 10 connected to in the wheelchair seat.
The wheelchair seat is thus divided into two seat components in the longitudinal direction of the wheelchair, preferably along a centre line 8' in FIG 3, each seat part comprising together two seat components and two back-support components, said seat components with connecting back-support components being capable of being swung independently to respective sides of the wheelchair, as illustrated in FIG. 3. According to one preferred embodiment of the invention, the seat components, when brought partially together, can substitute for a toilet seat.
Respective seat parts can be raised and lowered independently of each other. In the case of the illustrated embodiment, there is arranged in each of the moveable pericope-like parts 5 a blockable gas spring 11 provided with a manipulating knob 12 by means of which the parts 5 can be locked in selected positions. The lifting force exerted by each spring will preferably correspond essentia
REFERENCES:
patent: 439088 (1890-10-01), Allen
patent: 3882555 (1975-05-01), Edlund
patent: 5098158 (1992-03-01), Palarski
patent: 5148559 (1992-09-01), Morris
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