U.S. patent number 3,639,927 [Application Number 05/034,094] was granted by the patent office on 1972-02-08 for mattress for invalids.
This patent grant is currently assigned to Firma Otto Bock Orthopadische Industrie KG.. Invention is credited to Josef Munch.
United States Patent |
3,639,927 |
Munch |
February 8, 1972 |
MATTRESS FOR INVALIDS
Abstract
A frame of foam polymer with a rectangular cutout, positioned to
underlie the major part of the body of a patient recumbent thereon,
rests on a baseplate serving as a support for a multiplicity of
square or rectangular inserts of like foam material detachably
pasted onto the base so as to be removable at locations proximal to
a pressure-sensitive part of the patient's body. A transverse pad
at the foot end of the mattress has vertical recesses open toward
the head end to receive the feet of the patient whose legs rest on
anatomically shaped wedge pieces which extend into these recesses
but terminate short of their closed ends to leave room for the
unsupported heels of the patient.
Inventors: |
Munch; Josef (Duisburg-Hamborn,
DT) |
Assignee: |
Firma Otto Bock Orthopadische
Industrie KG. (Duderstadt, DT)
|
Family
ID: |
6602007 |
Appl.
No.: |
05/034,094 |
Filed: |
May 4, 1970 |
Foreign Application Priority Data
|
|
|
|
|
May 7, 1969 [DT] |
|
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G 69 18 374 |
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Current U.S.
Class: |
5/723; 5/648;
5/651; 5/733; 5/734 |
Current CPC
Class: |
A47C
27/148 (20130101); A47C 27/146 (20130101); A47C
27/15 (20130101); A61G 7/05715 (20130101) |
Current International
Class: |
A47C
27/14 (20060101); A61G 7/057 (20060101); A61g
007/02 () |
Field of
Search: |
;5/91,319,320,327,345
;297/218,219,229 ;161/159,167,406 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Nunberg; Casmir A.
Claims
I claim:
1. A mattress comprising a generally rectangular horizontal frame
of resilient material provided with a central longitudinal cutout
positioned to underlie the major part of the body of a patient
recumbent thereon, a multiplicity of resilient inserts closely
juxtaposed in said cutout to form a continuous surface with said
frame, said inserts being selectively removable from said frame to
relieve pressure on a sensitive part of the patient's body, a
transverse pad extending entirely across said frame at the foot end
thereof, said pad having a pair of vertical recesses open toward
and defined in part by a vertical wall facing the head end for
receiving the feet of the patient, and two elongate wedge pieces
shaped to support the legs of the patient up to the thighs, said
wedge pieces rising from said surface and extending into said
recesses while being spaced from the respective walls thereof by a
distance sufficient to accommodate the unsupported heels of the
patient.
2. A mattress as defined in claim 1, further comprising a baseplate
underlying said cutout and supporting said inserts.
3. A mattress as defined in claim 2 wherein said inserts are
adhesively but detachably secured to said baseplate, said pad is
adhesively but detachably secured to said frame and said wedge
pieces are adhesively but detachably secured to and overlie said
inserts.
4. A mattress as defined in claim 3 wherein said baseplate has an
outline substantially registering with that of said frame.
5. A mattress as defined in claim 4 wherein said inserts are
provided with pressure-activated adhesive layers on their
undersides.
6. A mattress as defined in claim 3 wherein said inserts are
rectangular.
7. A mattress as defined in claim 3 wherein said pad, said wedge
pieces, said frame and said inserts consist essentially of foam
polymer.
8. A mattress as defined in claim 3, further comprising a headrest
at the head end of said frame, said cutout terminating
substantially at said headrest.
Description
My present invention relates to a mattress to be used by invalids
and other persons with oversensitivity to external pressure on
parts of their body.
Amputees, paraplegics and other persons react with varying degrees
of discomfort to such pressures which frequently lead to bruises at
points of concentrated stress e.g., in the region of the hips or
buttocks in the case of a recumbent body. It is therefore desirable
to provide for a more even stress distribution by spreading the
area of contact between the body and the mattress on which the
patient is resting, a task calling for a wide variety of mattress
configurations according to the size of the patient and the nature
of the ailment.
It is, therefore, the general object of my present invention to
provide a mattress construction which can be quickly and easily
adapted to specific requirements for the purpose of relieving local
pressure on the body of a patient.
A related object is to provide means in combination with such a
mattress for keeping the feet of the patient free from pressure of
both the underlying mattress and an overlying blanket.
A further object is to provide a mattress, e.g., for hospital beds,
which can be quickly restored to use by a replacement of certain
parts upon being soiled or otherwise damaged.
In accordance with the present invention, I provide a mattress in
the form of a generally rectangular horizontal frame, commensurate
with the body measurements of a patient whom it is intended to
support, which has a central longitudinal cutout positioned to
underlie the major part of the patient's body in a recumbent
position, this cutout being filled by a multiplicity of preferably
rectangular (e.g., square) inserts closely juxtaposed therein to
form a continuous surface with the frame. Both the frame and the
inserts are made of resilient cushioning material, preferably a
foam polymer, as is a headrest carried by the mattress. The inserts
are individually and selectively removable from the frame to
relieve the pressure upon sensitive parts of the patient's body.
For this purpose, advantageously, the frame and the inserts are
supported on a baseplate which underlies the cutout and may have an
outline substantially registering with that of the frame. The
inserts may be detachably pasted onto that baseplate, as with the
aid of a pressure-activated adhesive.
According to another feature of my invention, the foot end of the
mattress frame carries a transverse pad formed with a pair of
vertical recesses which are open toward the head end to receive the
feet of the patient. Two elongate wedge pieces, shaped to support
the legs of the patient up to the thighs, rise from the mattress
and extend into these recesses but terminate short of the closed
ends of the latter by a distance sufficient to accommodate the
unsupported heels of the patient so as to keep them free from
pressure. A blanket covering the lower body of the patient can then
be draped over this pad so as to stay clear of his toes for the
avoidance of possible discomfort. The pad may be made of the same
polymeric foam material as the rest of the mattress structure.
The invention will be described in greater detail with reference to
the accompanying drawing in which:
FIGS. 2, 4 and 6 are plan views of three different embodiments of
my invention; and
FIGS. 1, 3 and 5 are cross-sectional views taken on lines I--I,
III--III and V--V of FIGS. 2, 4 and 6, respectively.
The mattress shown in FIGS. 1 and 2 comprises a rectangular frame 2
of foam plastic resting on a rigid baseplate 1 coextensive
therewith. Frame 2 has a rectangular central cutout 7, occupied by
an array of substantially identical inserts 3 of like foam plastic
and square outline. The inserts 3 are detachably cemented onto the
baseplate 1 by a pressure-activated adhesive which also serves to
hold the frame 2 in position. A headrest 4, also of foam plastic,
is similarly cemented onto the right-hand end of frame 2 just
beyond the cutout 7.
As shown in FIGS. 3 and 4, several of the squares 3 of the
preceding embodiment may be combined into larger inserts 3a (six
squares), 3b (nine squares) or divided into smaller strips 3c; the
latter may be partly removed, for example, at a location where the
stump of a leg amputee overhangs the middle section 3a.
FIGS. 5 and 6 show a mattress similar to that of FIGS. 1 and 2 with
the addition of a pad 5, likewise of foam plastic, detachably
cemented onto the frame 2 just beyond the end of cutout 7. A part
of the frame 2 and some of the inserts 3 are overlain by two
elongate wedge pieces 6 which are anatomically shaped to conform to
the hollow of the knees of the patient and to support his shanks
down to the region of the ankles. Two forwardly open vertical
recesses 5a in pad 5 receive the ends of the wedge pieces 6 with
enough clearance to accommodate the heels of the patient whose toes
do not quite reach the top of the pad so that they will not be
contacted by an overhanging blanket 8. The wedge pieces 6 may be
strips of foam plastic also detachably cemented to the underlying
mattress portions.
It will be apparent that, in the case of a soiled mattress, only
some of the inserts 3, 3a-3c will usually have to be replaced to
provide a clean supporting surface for the patient.
* * * * *