U.S. patent number 3,632,162 [Application Number 05/019,006] was granted by the patent office on 1972-01-04 for chair for the handicapped.
Invention is credited to Edward J. Trethaway.
United States Patent |
3,632,162 |
Trethaway |
January 4, 1972 |
CHAIR FOR THE HANDICAPPED
Abstract
A unitary structure is molded from resinous impregnated fabric
material to provide a back, seat and front leg portions with side
flanges which together form a channel for containing parts of the
body of a handicapped user. The unitary structure is supported on a
stable base by the front leg portions which preferably provide a
hingedlike effect due to the flexibility of the impregnated fabric
material. The base may be a wheeled dolly with suitable braking
means. Further support is provided by an adjustable length rear
leg, extending between the base and the rear of the seat portion.
The channel-shaped unitary structure preferably had additional
oppositely directed reinforcement channels sharing in common the
side flanges along each side. In addition to other reinforcement
there are preferably provided a detachable headrest and adjustable
and detachable tray and footrest members.
Inventors: |
Trethaway; Edward J. (Ithaca,
NY) |
Family
ID: |
21790915 |
Appl.
No.: |
05/019,006 |
Filed: |
March 12, 1970 |
Current U.S.
Class: |
297/149;
297/DIG.4; 297/397; 297/294; 297/452.12 |
Current CPC
Class: |
A61G
5/121 (20161101); A47C 7/38 (20130101); A47C
5/12 (20130101); A47C 7/68 (20130101); B60B
33/021 (20130101); A61G 5/128 (20161101); A47C
7/506 (20130101); A61G 5/00 (20130101); A61G
5/1094 (20161101); A61G 5/1018 (20130101); A61G
5/101 (20130101); A61G 5/1037 (20130101); A61G
5/1075 (20130101); Y10S 297/04 (20130101) |
Current International
Class: |
A47C
7/50 (20060101); A47C 7/00 (20060101); A47C
5/00 (20060101); A47C 5/12 (20060101); A47C
7/36 (20060101); A47C 7/68 (20060101); A47C
7/38 (20060101); A47C 7/62 (20060101); A61G
5/00 (20060101); B60B 33/00 (20060101); B60B
33/02 (20060101); A61G 5/12 (20060101); A61G
5/10 (20060101); A47b 039/00 (); A47c 001/10 ();
A47c 007/02 () |
Field of
Search: |
;297/71,115,196,344,345,445,357,DIG.2,DIG.4,377,194
;248/399,401,160,161 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Gilliam; Paul R.
Claims
I claim:
1. A chair for the handicapped comprising
a stable support base,
a unitary structure mounted on said support base having back, seat
and front leg portions molded from a web of resinous impregnated
fiber material wherein rigidity is increased by continuing the
molded web in essentially parallel continuous side flanges at the
opposite sides of the seat, back and front leg portions, whereby
the unitary structure provides a channel for containing seated body
portions of the user, the front leg portion being attached to the
base and having a hinge region adjacent to the place of attachment
to the base providing a hinge effect due to the inherent
flexibility of the impregnated fiber material, in order to afford
limited tilting or inclination of the chair,
a single rear leg beneath the seat and spaced back from the front
leg portion, including telescoping pieces, one affixed beneath the
seat and one affixed to the base, movement of which relative to one
another changes the effective length of the rear leg to effect
rotation of the unitary structure about the hinge region and
latching means for securing in selected positions the telescoping
pieces against movement relative to one another,
a removable footrest adjustably positionable within the side
flanges of the molded channel in the front leg portion of the
unitary structure and being supported in selected positions by said
side flanges, and
associated tray and headrest attachments removably supported on
said unitary structure, at least one of which is adjustable in
position.
2. The chair of claim 1 in which the unitary structure includes a
flange portion at the bottom of the front leg portion extending
generally perpendicular to the side flanges and joining together
the side flanges.
3. The chair of claim 2 in which the side flanges themselves are,
in turn, provided with a further flange web increasing strength of
the chair and providing arms on the chair at an appropriate level
above the seat.
4. The chair of claim 3 in which the side flange structure is
completed by further flanges directed away from the direction of
opening of the chair so that each side flange structure all
together provides a channel of opposite-facing direction from the
channel provided by the chair itself and so that there is a channel
extending along the length of each side of the chair to provide
greater rigidity and whose edges are rounded to prevent the user
from being injured on an edge of the web.
5. The chair of claim 4 in which the tray attachment is provided on
the outer surface of the outermost flange at each side of the chair
below the flanges supplying arms.
6. The chair of claim 5 in which the tray attachment is a metallic
channel provided to entrap slide elements permitting adjustment of
the tray toward and away from the back of the chair, the channel
slide element being located beneath the arms of the chair and out
of the way of the user.
7. The chair of claim 4 in which a flange is provided at the top of
the back, extending away from the back in the direction away from
the front leg portions, said flange also closing the ends of the
flanged channel structures extending along each side of the unitary
structure.
8. The chair of claim 7 in which the removable headrest effectively
extends the back upwardly and is removably attached to the flange
atop the back of the unitary structure, a convoluted portion
conforming to and interfitting with the flange across the top of
the back of the unitary structure so that attachment is made by a
single removable attachment means extending through the convoluted
portion and said flange.
9. The chair of claim 8 in which the headrest is provided with a
series of spaced openings in order to accommodate straps and ties
for pillow and head holding apparatus.
10. The footrest of claim 1 in which the footrest is provided with
means alternatively engageable with a number of portions in the
front leg web portion of the channel and retractable means
engageable at different levels into alternative pairs of opposed
openings in the opposed flanges.
11. The chair of claim 10 in which rows of holes are provided in
the front leg web portion and each of the respective flanges at
such levels to accommodate pins in the footrest such that the
footrest may be either horizontal or tilted at angles which are
multiples of 8.degree. by rotating the footrest around the pins
engaged by the flanges.
12. The chair of claim 5 in which the tray extends above and beyond
the arms of the chair and is provided with downwardly extending
support flanges through each of which extend at least two manual
locking means attachable to slides in channel slide guides, each of
said locking means being adjustable to lock and loosen structure in
position in the guides.
13. The chair of claim 12 in which the support flanges for the tray
are provided with slots transverse to the slide guide and
permitting adjustment of the tray upwardly and downwardly, away
from and toward the seat of the chair, and at least one of the
manual locking means acts to lock the tray in vertical position by
clamping the flange against the guide.
14. The chair of claim 1 in which the base is provided with wheels
permitting it to be conveniently moved about and suitable brake
means to hold the chair in a selected place.
Description
The present invention relates to a chair for the handicapped. More
specifically, the present invention relates to a chair which is
adapted especially to the needs of a severely handicapped person
who may be unable to support himself in a wheelchair.
In the prior art wheelchairs and other devices have been designed
for the needs of persons who are normal in most respects but have
to be moved without walking, for some specific reason. Such chairs
do not meet the particular needs of the severely handicapped, such
as persons who have not developed normally from childhood, either
physically or mentally, so that they are not able to sit up without
help. The present invention has for its principal object the
fulfilling of the needs of such severely handicapped people, so
that they may be able to assume a sitting position and perform
simple tasks, which they may be unable to do as well in bed.
More specifically, the chair of the present invention contemplates
providing a unitary structure on a stable support base. The unitary
structure consists of a molded web of resinous impregnated fabric
material having a back, a seat, and front leg portions, generally
parallel side flanges at the opposite sides of these portions
whereby the unitary structure provides a channel for containing
seated body portions of the user.
The present invention also provides attachments to the unitary
structure including a headrest, an adjustable tray and footrest
portions and the chair itself is preferably adjustable to a
slightly reclining position.
For a better understanding of the present invention reference is
made to the accompanying drawings in which
FIG. 1 is a perspective view of the chair of the present invention
from the rear;
FIG. 2 is a plan view of the chair above;
FIG. 3 is a plan view of the chair from below on a somewhat smaller
scale;
FIG. 4 is a vertical sectional view of the chair partially in
elevation in the region of the tray support;
FIG. 5 is a detail sectional view showing attachment of the rear
leg means to the base;
FIG. 6 is a sectional view taken along line 6--6 of FIG. 4, showing
the footrest in plan from the bottom;
FIG. 7 is a perspective view of the tray support flange structure
and its associated manual locking means, showing an exploded view
of the said structure through a flange at one end;
FIG. 8 is sectional view taken along line 8--8 in FIG. 4 showing
details of the tray support and locking structure;
FIG. 9 is a sectional view taken along line 9--9 of FIG. 4;
FIG. 10 is a sectional view taken along line 10--10 of FIG. 4;
FIG. 11 is a view of a front wheel showing a manually adjustable
brake associated therewith.
Referring first to FIGS. 1, 2, 3 and 4, it will be seen that the
chair is provided with a stable base generally designated 10, and
preferably made of molded resinous impregnated fabric. The base is
made mobile by four wheels which are rotatable relative to
conventional support brackets on the base. The front wheels 12 are
fixed and the back wheels 14 swivel, in order to provide movement
of the chair.
The body-supporting portion of the chair is a unitary structure
generally designated 16. The chair, like the base, is preferably
made of resinous impregnated fabric material. In preferred
embodiments the impregnated fabric is fiberglass. The resinous
material employed and the overall thickness of the laminate are
matters of judgment and subject to variation depending on the
weight of persons to be supported and other factors. The material
is molded to chair form avoiding sharp corners and rough edges in
order to prevent injury to the handicapped user or institutional
aides. The unitary molded structure includes a back 18, a seat 20
and front leg portion 22, all in a continuous web. The various
dimensions may be varied as to size depending upon the size of the
user but to avoid manufacturing too many sizes, padding may be
employed. The unitary structure has side flanges to provide a
channellike structure containing the seated body portions of the
user. As seen best in FIGS. 1 and 4, the parallel side flanges 24
and 24' extend from the front leg portion 22 along the seat portion
20 and up along the back 18, diminishing in width toward the top of
the back.
The flanges 24 and 24' are further extended from the side flanges
at opposite edges of the chair in channels which are oppositely
directed from the channel provided by the chair itself. The
opposite direction of the channel can be seen in FIG. 6. The webs
of the smaller reinforcing channels 26 and 26' are parallel to the
web 27 forming the main web of the leg portion 22 and the outer
flanges 28 and 28' are generally parallel to side flanges 24 and
24'. At the seat level, the web 30 of the reinforcing channel
provides the arms of the chair spaced above the seat by the width
of the side flange 24 in that region. As seen in FIG. 4, it will
also be noted that the seat and the arm are designed to be at a
slight angle to one another, with the seat being slanted downwardly
at a small angle on the order of 8.degree. from the horizontal
toward the back and the arm being essentially horizontal in this
position. The outer flanges 32 and 32' of the reinforcing channel
at the arm also preferably provide support for the channel guides
34 and 34', which will be discussed below in connection with the
tray. As best seen in FIG. 3, both the depth and the width of the
reinforcing channels along the sides of the back taper as they
approach the top. The webs 24 and 24' in this area, depart from the
parallel and rather increase the sight curvature of the back more
sharply at the edges before being terminated at the webs 36 and
36'. The outer flanges 38 and 38' are more enlarged. The whole
structure is closed at the top in a flange 40 generally
perpendicular to the back, to which a headrest 42 may be optionally
attached.
The unitary structure, also preferably has a flange 44 extending
between the side flanges 24 and 24' closing the end of the leg
structure. A slight terminating flange 46 in the plane of webs 26
and 26' completes the bottom end of the unitary structure 16. The
unitary structure is preferably connected to the base 10, using a
pair of bolt and nut connectors 48, which are spaced apart as may
be seen in FIG. 4 and connect the web 44 to the forward end of the
base platform 10. The flexibility of the material of the web 48 and
the unitary structure, plus the optional use of a slightly
compressible washer material 50 permit a hinging effect, which lets
the unitary structure 16 of the chair to be tilted back into the
position shown in phantom lines in FIG. 4. Support at the front is
obviously insufficient and additional support structure 52 is
needed in the form of rear leg means of some sort, preferably a
rear leg whose effective length can be adjusted to accommodate and
effect the tilt of the chair. In this case a single rear leg in the
form of a telescoping column, which permits length adjustment,
extends between the base 10 and the rear portion of seat 20, spaced
well behind the front leg portion of the chair and its attachment
to the base 10. In this particular embodiment the telescoping rear
leg column is made of a rod 54 and snugly and slidably engaged by
tube 56 attached respectively to the seat and to the base. Rod 54
has a series of parallel diametrical holes through it which mate
with the single diametrical hole through tube 56. As seen in FIG.
4, in the partially sectioned portion of the structure, a pin 58,
having a suitable pull ring 58a, passes through a selected
diametrical hole in rod 54, as well as the holes in tube 56, and
holds the rear leg at a preselected length and the chair at a
corresponding inclination. A practical range of adjustment is
probably 15.degree. or 16.degree. at about 4.degree. increments so
that the number of holes shown for illustration are probably not
useful in practice. The rod 54 is connected to the bottom of the
seat of the chair by relatively massive bracket which provide a
socket structure which rigidly accommodates rod 54. The tube 56 is
attached, as shown in FIG. 8, through a socket structure 64, which
is bolted to a boss portion 66 of the base 10 which provides
increased flexibility.
Considering the base briefly again, it will be observed that it is
made so that it has a slight concavity toward the center at the low
point of which is provided a drain opening 68, accommodating a
removable plug 70. The base, therefore, serves to collect body
fluids and spilled food and retain them by virtue of a dam molded
into the structure by the inverted channel 72 around the outer
periphery of the base. The wheels 12 and 14 are preferably standard
caster structures, the rear wheels 14 being swivel casters.
Referring to FIGS. 4 and 6, there is shown a suitable footrest 74,
which may also be made of molded resinous material, or, if
preferred, of sheetmetal material. The top of the footrest may be
coated with nonslip material or corrugated for the same purpose.
The structure shown is provided with a rearwardly extending pin 76,
which may be cast into an enlarged portion of the footrest, and
which is adapted to engage one of a plurality of holes 78
vertically aligned in the web 27. Other means of interengagement of
the parts could of course be substituted. The footrest also has
slidable L-shaped retractable pins 80 and 80' at opposite ends
about in the middle of the structure. The L-bends provide handles
82 and 82'. The pins slide in guides provided by bosses 84 and 84',
specifically provided for that purpose, and are urged outwardly
toward the side flanges by springs attached between the footrest
and the handles 82 and 82'. In the illustrated embodiment the pins
are urged outwardly and away from one another until the handles 82
and 82' engage the ends of the bosses in order to engage in opposed
holes in the opposed rows of holes 88 and 88' in the side flanges
24 and 24', respectively. To put the footrest in place a hole 78 is
selected at an appropriate level for the user and pin 76 inserted
while the pins 80 and 80' are retracted. Pins 80 and 80' then are
preferably inserted into the next higher level of holes 88 and 88',
respectively. The pins 80 and 80' are retracted by grasping the
handles 82 and 82' and squeezing them together until the pins are
withdrawn to a position where the footrest can be slid into place
and releasing the handles when the pins are in place.
Another attachment for the chair is the tray generally designated
90 seen in FIGS. 1, 2, 3 and 4. The tray consists of a molded
structure of resinous impregnating fiber glass, reinforced by a
bead 94, which forms a dam around the top surface and a downwardly
extending flange 96. Fixed beneath the tray is a bracket 98
extending the full length of the tray and reinforcing the tray.
Bracket 98 as seen in FIG. 7 has down-turned flanges 100 and 100',
each having three parallel vertically oriented slots 102 and 102',
which are therefore transverse to slide guides 34 and 34'. As seen
in FIG. 7, these slots permit the passage of threaded shank
portions of both vertical adjustment manual locking means 104 and
horizontal adjustment manual locking means 106, both of whose
threaded shank portions 104a and 106a, respectively, engage a
common slide bar 108 or 108' of T-shaped cross section. As seen in
FIGS. 8, 9 and 10, the slide bar 108 slides within the guide 34,
which is a channel guide with overlying flange portions to retain
the slide, as can best be seen in FIGS. 9 and 10. The guide is
affixed to flange 32 by bolts, or other suitable means, as shown in
FIG. 8, and the slide bar 108 slid in place into the slide guide 34
from one end. The tray flanges 100 and 100' are put in place, as
seen in FIG. 8, so that their slots 102 reveal the threaded holes
in the slide bar and the threaded shanks 104a and 106a of manual
adjustment means 104 and 106 can pass through the slots and engage
their proper holes in the slide. As seen in FIGS. 8 and 10, the
knob portion 104b of manually adjusted vertical adjustment means
has a large flat shoulder, which effectively clamps the flange 100
against the exposed flat bottom of the T-slide which projects above
the guide when the manual adjustment knob 104b is tightened down
into position. As seen in FIGS. 8 and 9, horizontal adjustment
member 106 passes through middle slot 102 out of contact with the
flange 100, but its threaded shank 102a extends through the slide
bar 108 and, in its locking position, engages the bottom of the
slide guide channel 34, while urging the crosshead of the T-section
of the slide 108 against the entrapping flanges of the slide, thus
preventing the slide from moving relative to the channel and
holding the tray in place horizontally.
It will be observed in passing that the slots 102 are made with
greater clearance than required to pass the respective shanks. This
clearance permits the tray to be tilted slightly as when the
unitary structure is in the phantom position of FIG. 4 and the tray
needs to be horizontal.
Finally, the optional headrest may be attached as seen in FIG. 4 by
insertion of the flange 40 within the convolution channel 110,
molded into the headrest, which is merely an extension of the back
18. A strip of resilient material within the bottom of the channel
is compressed by the flange before the stop 114 at the bottom of
the structure bottoms on the back of the chair's back. Thus
compression of the resilient material tends to urge the headrest
outward, but it is held snugly in place by a pin 116 placed through
the aligned holes in the channel convolution 110 and flange 40.
Ring handle 116a enables the handling of the pin both in inserting
and withdrawing and prevents the pin from passing through the hole
completely and escaping from the bottom.
As seen in FIG. 11, and in FIGS. 1, 2 and 4, simple means is
provided for braking each of the front wheels 12. This means is
supported through the base and consists of a brake shoe 118 on the
end of a threaded shaft 120 rotatable relative to the shoe but
threaded through a boss 122 in base 10. The threaded shaft 120
carries a knob 124 to rotate the shaft 120 to engage the brake shoe
against the wheel and brake it, or to release the wheel.
It will be observed that an opening 130 is provided through the
back 18 of the chair, said opening having reinforcing flanges 132
surrounding it to avoid loss of rigidity by this cutout. The
opening provides room just above the seat to accommodate extra
padding, diapers on the user, or other bulkiness of clothing or
equipment which might add to the discomfort of the user, if not
provided. Extending along the sides of the back at each side are a
row of slots 134 and 134'. These slots provide means for supporting
belts, or belts or ties for supporting vests, or ties for holding
padding or for supporting the user of the chair, if needed.
Similarly, large diagonal slots 136 and 136' may be used for a seat
belt, as required, or for padding as needed. Similar slots may be
provided elsewhere on the unitary structure. It should be noted in
many cases adjustment of the tray into a position against the user
will afford all the extra support for the upper body that is
required.
It will be observed that slots 138 and 138' are also provided on
the footrest 74 to enable straps to be employed to hold the feet in
position as required. Likewise, slots 140 and 140' are provided
through the headrest 42 to support pillows or padding or ties or
for restraints to hold the user's head in place.
In some cases corresponding parts on opposite sides of the
structure have been numbered with identical numbers, but with the
numbers on one side primed and on the other side unprimed. In many
cases both have been described but in others numbers appearing in
the drawings may not appear in the specification but their
significance will be understood from these remarks.
A preferred embodiment of the chair in accordance with the present
invention has been described. It will be apparent to one skilled in
the art that modifications of this chair can be made very readily.
Modifications to the chair have been contemplated within the scope
of the claims and all such modifications within the scope of the
claims are intended to be within the scope of the present
invention.
* * * * *