U.S. patent application number 09/767766 was filed with the patent office on 2001-10-11 for orthopedic support pillow.
Invention is credited to Frydman, Larry G..
Application Number | 20010027577 09/767766 |
Document ID | / |
Family ID | 27502858 |
Filed Date | 2001-10-11 |
United States Patent
Application |
20010027577 |
Kind Code |
A1 |
Frydman, Larry G. |
October 11, 2001 |
Orthopedic support pillow
Abstract
A stress reducing device is defined by a dual use orthopedic
pillow having a low density polyurethane foam outer region, a high
density polyurethane foam middle region that are provided in
removably attachable layers, so that the size of the device may be
adjusted to accommodate different sizes and preferences of
individual users. The pillow advantageously includes leg clasps for
securely engaging the inner thighs of an individual in a side lying
position defined by a stem and a pair of crescent shaped
buttresses. The buttresses resist rotation to the prone and supine
lying positions. The high density foam within the stem separates
the knees to reduce spinal stress. Advantageously, a supine
sleeping position is aided by positioning said pillow under the
legs to flatten out the spine while supporting the legs at the
thigh and calf regions.
Inventors: |
Frydman, Larry G.;
(Thornhill, CA) |
Correspondence
Address: |
JON E. HOKANSON
SMALL LARKIN, LLP
18th Floor
10940 Wilshire Boulevard
Los Angeles
CA
90024
US
|
Family ID: |
27502858 |
Appl. No.: |
09/767766 |
Filed: |
January 22, 2001 |
Related U.S. Patent Documents
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
|
|
09767766 |
Jan 22, 2001 |
|
|
|
09573012 |
May 17, 2000 |
|
|
|
6182314 |
|
|
|
|
09573012 |
May 17, 2000 |
|
|
|
09353416 |
Jul 15, 1999 |
|
|
|
6154905 |
|
|
|
|
09353416 |
Jul 15, 1999 |
|
|
|
08999372 |
Dec 29, 1997 |
|
|
|
08999372 |
Dec 29, 1997 |
|
|
|
08480581 |
Jun 7, 1995 |
|
|
|
Current U.S.
Class: |
5/648 |
Current CPC
Class: |
A47C 20/021
20130101 |
Class at
Publication: |
5/648 |
International
Class: |
A47C 017/86 |
Claims
What is claimed is:
1. A stress reducing device for use by an individual while in a
side lying position, said device comprising: a pair of buttresses,
each having a convex side and a concave side; an elongated stem
connected to said buttresses between said concave sides; said
device including a plurality of layers adapted to fasten to each
other and to said buttresses and stems; said buttresses and stem
forming respective C-shaped leg clasps on opposite sides of said
stem; said leg clasps, each having a pair of resilient lips having
an elastic characteristic to allow said lips to be spread apart in
response to a predetermined force; such that said lips of each of
said clasps may be separated to receive legs of an individual
within the respective clasps, and release of said force allowing
said lips to securely engage said legs within respective
clasps.
2. A stress reducing device for use by an individual while in a
side lying position, said device comprising: a pair of buttresses,
each having a convex side and a concave side; an elongated stem
connected to said buttresses between said concave sides; said
buttresses and stem forming respective C-shaped leg clasps on
opposite sides of said stem; said leg clasps, each having a pair of
resilient lips having an elastic characteristic to allow said lips
to be spread apart in response to a predetermined force; such that
said lips of each of said clasps may be separated to receive legs
of an individual within the respective clasps, and release of said
force allowing said lips to securely engage said legs within
respective clasps.
3. The stress reducing device of claim 2, wherein: said stem
includes a low density compressible out layer for contacting said
thighs and a center region having a high density compression
resistant inner layer such that when said stem is positioned
between said legs, respective knees of said legs are positioned in
spaced apart overlying relation.
4. The stress reducing device of claim 3, wherein: said buttresses
have a volume and density characteristic such that when said legs
are secured in said clasps, said buttresses positioned against the
front side and back side of the individual resist rotation by the
individual to the spine and prone positions.
5. A stress reducing device for use by an individual while in a
side lying or supine position, said device comprising: a
compression resistant mat having a pair generally rectangular
shaped surfaces; a first and second outer layer connected to
respective surfaces of said mat; said outer layers, each having an
outer surface including a lengthwise concave channel along said
outer surface; a pair of leg clasps formed in respective outer
layers defined by outwardly facing widthwise C-shaped channels
located at the lengthwise median.
6. A stress reducing pillow for use by an individual while in a
sideling or supine position, the device comprising: a first and
second outer surface, each including a lengthwise concave channel
along said outer surface; a pair of leg clasps formed in respective
outer layers defined by outwardly facing widthwise C-shaped
channels located at the lengthwise median; a first and second end;
each having a convex shaped surface; and a flat planar side walls,
each extending between said ends and outer surfaces.
7. A stress reducing pillow for use by an individual while in a
side lying or supine position, the device comprising: a first and
second outer surface, each including a lengthwise concave channel
along said outer surface; a pair of leg clasps formed in respective
outer layers defined by outwardly facing widthwise C-shaped
channels located at the lengthwise median. a first and second end,
each end having a convex shaped surface; flat planar side walls,
each extending between said ends and outer surfaces; and a
detachable layer removably attached to said first outer surface,
removably attached to said second outer surface and positioned
between said first and said second outer surfaces.
8. A stress reducing device for use by an individual between the
legs and along the left thigh and along the right thigh of the
individual while in a side lying position, said device comprising:
a pair of buttresses, each having a convex side and a concave side;
an elongated stem connected to said buttresses between said concave
sides; said buttresses and stem forming respective C-shaped leg
clasps on opposite sides of said stem; each of said leg clasps
having a pair of resilient lips formed by intersecting the convex
and concave sides of the buttresses and having an elastic
characteristic to allow said lips to be spread apart in response to
a predetermined force; such that, upon said lips being spread apart
by said force, said clasps are adapted to receive the legs of the
individual, and, upon release of said force, allowing said lips to
return together thereby securely engaging the legs within
respective clasps and resisting rotation of the individual to
supine and prone positions.
9. A pillow made of a foam material, having a length, a height and
a width dimension comprising: a first side wall extending along the
length dimension and along the height dimension; a second side wall
extending along the length dimension and along the height
dimension; a first C-shaped channel extending across the pillow in
the width dimension from the first side wall to the second side
wall, having an arc of curvature greater than 180.degree. and open
in a first direction; a second C-shaped channel extending across
the pillow in the width dimension from the first side wall to the
second side wall, having an arc of curvature greater than
180.degree. and open m in a direction opposite the open direction
of the first channel; a first buttress extending across the pillow
in the width dimension from the first side wall to the second side
wall and having an elliptical arc of curvature greater than
180.degree.; a second buttress extending across the pillow in the
width dimension from the first side wall to the second side wall
and having an elliptical arc of curvature greater than 180.degree.;
said first buttress having an elliptical arc of curvature which
intersects with the first C-shaped channel arc of curvature and
with the second C-shaped channel arc of curvature to form a first
resilient edge at the first C-shaped channel and a second resilient
edge at the second C-shaped channel; said second buttress having an
elliptical arc of curvature which intersects with the first
C-shaped channel arc of curvature and with the second C-shaped
channel arc of curvature to form a third resilient edge at the
first C-shaped channel and a fourth resilient edge at the second
C-shaped channel; the of intersection of the elliptical arc of
curvature of the first buttress with the arcs of curvature of the
first and second C-shaped channels and the intersection of the
elliptical arc of curvature of the second buttress with the arcs of
curvature of the first and second C-shaped channels lie between a
first plane tangent to both the first C-shaped channel and the
second C-shaped channel and a second plane tangent to both the
first C-shaped channel and the second C-shaped channel; the first
buttress contains the first plane tangent to both the first and
second C-shaped channels; and the second buttress contains the
second plane tangent to both the first and second C-shaped
channels.
10. The pillow of claim 9 further including at least one groove
interrupting the surface of the first C-shaped channel and
extending along the width dimension.
11. The pillow of claim 9 further including at least one groove
interrupting the surface of the second C-shaped channel and
extending along the width dimension.
12. The pillow of claim 9 wherein the elliptical arcs of curvature
of the first buttress and of the second buttress are defined by
ellipses having major axis of equal or different lengths.
13. The pillow of claim 9 wherein the elliptical arcs of curvature
of the first buttress and of the second buttress are defined by
ellipses having equal or different eccentricity.
14. The pillow of claim 9 wherein the pillow is formed in a first
section, a second section and in a third section; the first section
including the first C-shaped channel and a first surface opposite
the open direction of the first C-shaped channel; the second
section including the second C-shaped channel and a second surface
opposite the open direction of the second C-shaped channel; the
third section having a predetermined height and having the same
length and width as the first section and the second section; the
third section adjacent and fixedly connected to said first surface
of the first section; the third section adjacent and fixedly
connected to said second surface of the second section.
15. The pillow of claim 9 wherein the pillow is formed in a first
section, a second section and in a third section; the first section
including the first C-shaped channel and a first surface opposite
the open direction of the first C-shaped channel, said first
surface including a third channel; the second section including the
second C-shaped channel and a second surface opposite the open
direction of the second C-shaped channel, said second surface
including a protrusion adapted to fit within and conform to the
third channel whereby the first section may be detachably connected
to the second section; the third section having a predetermined
height dimension, a surface including a protrusion adapted to fit
within and conform to the third channel whereby the third section
may be detachably connected to the first section, and a surface
having a fourth channel of the same shape as the third channel,
whereby the third section may be detachably connected to the second
section.
16. The pillow of claim 14 or claim 15 wherein the foam of the
third section is more dense than the foam of the first section.
17. The pillow of claim 14 or claim 15 wherein the foam of the
third section is more dense than the foam of the second
section.
18. The pillow of claim 9, claim 14, or claim 15 including: the
first C-shaped channel having a predetermined surface; a cavity
provided in the surface of the first C-shaped channel; said cavity
being adapted to receive an inlay; said inlay being adapted to be
disposed in said cavity and to conform to the predetermined surface
of the first C-shaped channel; and said inlay being fixedly
disposed in said cavity.
19. The pillow of claim 9, claim 14, or claim 15 including: the
second C-shaped channel having a predetermined surface; a cavity
provided in the surface of the second C-shaped channel; said cavity
being adapted to receive an inlay; said inlay being adapted to be
disposed in said cavity and to conform to the predetermined surface
of the second C-shaped channel; and said inlay being fixedly
disposed in said cavity.
20. The pillow of claim 18 or claim 19 wherein the inlay is soft
viscoelastic memory foam.
21. The pillow of claim 18 or claim 19 wherein the exposed surface
of the inlay is convoluted.
22. The pillow of claim 18 or claim 19 including a medial plane
extending along the length dimension and along the width dimension
and further including a groove in the first side wall positioned in
the medial plane.
23. The pillow of claim 18 or claim 19 including a medial plane
extending along the length dimension and along the width dimension
and further including a groove in the second side wall positioned
in the medial plane.
24. The pillow of claim 18 or claim 19 including a medial plane
extending along the length dimension and along the width dimension
and further including a groove in the first buttress positioned in
the medial plane.
25. The pillow of claim 18 or claim 19 including a medial plane
extending along the length dimension and along the width dimension
and further including a groove in the second buttress positioned in
the medial plane.
Description
[0001] This is a continuation-in-part of pending application Ser.
No. 09/573,012, filed May 17, 2000, which is a continuation of U.S.
Pat. No. 6,154,905 which was a continuation-in-part of application
Ser. No. 08/999,372, filed Dec. 29, 1997, now abandoned, which was
a continuation of application Ser. No. 08/480,581, filed Jun. 7,
1995, now abandoned.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates to orthopedic support devices
for minimizing spinal stress while an individual is in the lying
position. More particularly the present invention relates to an
orthopedic support device that bolsters, i.e., supports the back of
the legs of an individual lying on his/her back and additionally
maintains spinal support for an individual when lying on his/her
side; and to adjustable orthopedic support pillows which can be
varied and customized to support the individual's needs.
[0004] 2. Description of Prior Art
[0005] Spinal related complaints are very common. In fact, back
pain is the second most common complaint (behind the common cold)
for visits to the family doctor. Proper spinal support (whether
related to the lower back, upper back or neck) has been a concern
for decades. This has resulted in a significant variety of products
designed to provide greater comfort and support.
[0006] The majority of these products were designed for 95
percentile of the population. As all individuals vary anatomically,
and when combining this factor with individual and personal
preference, the varying possibilities would render customization to
all individuals to be not practical. Methods of customization for
both the cervical and lumbar spine have been attempted, as
discussed below. However, these vary from intricate systems of
support that are either adjustable through an inflatable means,
fluid filled or even a combination of self attachment through the
use of hook and loop fastening devices, zippers and strapping. All
of these methods although effective, would be extremely costly from
a manufacturing standpoint. None of these products, whether
designed to support the cervical or lumbar spine, ever considered
the specific needs of the individual user. For all of the above
reasons, a need exists for an orthopedic support pillow that is
capable of being customized to the individuals needs as opposed to
the individual conforming to the product.
[0007] The present invention overcomes many of the problems of the
prior art in that it provides a capability for customization of an
orthopedic support pillow to fit the individuals needs, without the
use of accessory application devices such as hook and loop, elastic
bands, zippers and/or straps.
[0008] It is generally known that maintaining proper posture of the
spine helps to prevent the occurrence of spinal injury and back
pain. The preferred proper spinal posture in all daily sitting and
upright activities includes a slight lordotic curve in the lumbar
region of the spine, or what is known as the "neutral spine"
position in lay terms. That is the spinal position where all stress
on the spine is minimized to allow the spine to rest in its
naturally curved position. For example, it is commonly known that
when lifting heavy objects, an individual should use their knees to
lift such objects and that the back should be maintained in the
neutral spine position to alleviate any potential stress to the
spine which can lead to back pain.
[0009] With the recent, increasing interest in ergonomics and in
prevention of repetitive trauma injuries in the work place, sleep
ergonomics has been for the most part neglected. On the average of
1/3 of most individuals' lives is spent partaking in this form of
activity. One must appreciate the necessity that merely lying down
is not sufficient for spinal stress reduction and thus proper sleep
postural maintenance is paramount for complete and comfortable
rest.
[0010] For years it has been recommended that proper sleep posture
would entail avoiding the prone position, simply due to the
aggravated stress on the lumbar spine (from accentuation of the
lordotic curve) and as well the rotational positioning of the
cervical spine could lead to neck pathomechanics over time. The
supine position was promoted, however, without the appropriate
flexion at the knee the lumbar lordotic curve was as well
accentuated. In other words, when lying on the backside, it is
natural for the legs to lie flat on the sleeping surface. In this
manner the legs cooperate with the buttocks to act as a lever
raising the lumbar region of the spine thereby causing an unnatural
accentuation of the lordotic curve that may result in stress on the
spine as well. In order to alleviate this stress caused by the
legs, it is preferred that an individual sleep with the knees bent.
This sleeping position reduces the stress on the lumbar region of
the spine and allows the spine to rest flatly against the mattress
or other sleeping surface. However, without some type of leg
support, the natural tendency of the knees is to flatten out.
[0011] Lying on one's side is another preferred sleep position.
However, without the appropriate support, the lumbar spine has a
tendency to be affected by rotational stresses due to torquing
factors between the upper and lower body. In the side lying
position, the legs of the individual are generally maintained in an
overlying relationship with each other. Positioning the legs in
this manner at the mattress along one side of the body causes the
body to compensate for this position which may result in stress on
the spine. In order to minimize these stresses one must be
knowledgeable of both human anatomy as well as physical forces
acting on the spine. Simply relieving gravitational stress from the
spine is insufficient to reduce spinal stress and strain to the
point of eliminating it.
[0012] Several devices have been proposed to alleviate stress on
the spine of an individual while sleeping. Such devices include
large pillows or other supporting devices placed between the upper
thighs of an individual to maintain a side lying position. These
pillows extend out and away from the front and back sides of the
individual to block, or prevent the individual from rolling over.
Such devices are well known in the art and a variety of such
pillows are available. One problem associated with these devices
arises from the natural tendency of people to roll or shift
positions while sleeping. Such movement can cause these pillows to
shift or move from the preferred position in-between the
individuals legs thereby defeating the purpose of the pillow or
causing the sleeper to awaken and re-adjust the pillow. Some side
lying devices have over come this problem by adding straps to
secure the pillow to the thighs. However, it is not desirable to
secure the pillow in this manner especially if a fire or other
emergency occurred. Thus the need exists for an orthopedic support
pillow that maintains support between the legs for a sleeper lying
in a side lying position, but which can easily be removed.
[0013] In addition, it is desirable to have an orthopedic device as
described above that could also support the back sides of the legs
to maintain a bend in the knees of an individual while lying in the
supine position. Such a dual capability would allow an individual
to select a comfortable sleeping position while helping to
alleviate stress on the spine. Thus the need exists for an
orthopedic device that relieves spinal stress and strain either
when an individual is lying on his/her side or back, and provides
for a selection of individual sleep positions.
OBJECTS AND SUMMARY OF THE INVENTION
[0014] A primary object of the present invention is provide a
flexible lower limb support device which can be utilized in order
to support and assist an individual to lying in either the supine
or side lying positions.
[0015] It is yet another object of the present invention to provide
a flexible lower limb support device which will inhibit an
individual from lying in the prone position.
[0016] It is yet another object of the present invention to provide
a flexible lower limb support device which can maintain the normal
anatomical position of the lower limbs when side lying in order to
minimize stress on the lumbar spine, sacroiliac joints and femoral
acetabular joints.
[0017] It is yet another object of the present invention to provide
a flexible lower limb support device which will assist an
individual lying supine by minimizing the lumbar lordotic
curve.
[0018] Another object of the present invention is to provide leg
secure engagement of the device to the inner thighs of the
individual for uninterrupted sleep while in a side lying
position.
[0019] These and other objects of the present invention are
attained by providing lower limb support device which is,
generally, biconcave in lengthwise design and consists of two outer
layers of lower density polyurethane foam and a middle layer of
higher density polyurethane foam. The opposing outer layers are
contour cut to provide two widthwise channels traversing opposing
upper and lower outer layers of the device. The channels, forming
C-shaped clasps, universally contour and support an individual's
thighs as well as the upper border of the knee joints by
maintaining them in the normal anatomical position.
[0020] Several of the embodiments described herein incorporate
three forms of orthopedic support cushions which are utilized on
different regions. All three of these pillows are customizable via
a tongue and groove attachment where the individual components of
the support cushion can be either added to or subtracted from other
components create the customization desired and necessary for the
individual user.
[0021] The first alternate embodiment includes a cervical pillow,
which is contoured by having two buttress of unequal dimension
placed linearly at either end of the pillow. Vertically the pillow
is made up three layers such that it's height can be customized to
an individual physical and therapeutic needs. These layers are
connected to one another via a tongue and groove locking mechanism
which fastens the layers to one another in series.
[0022] This tongue and groove mechanism consists of a (mushroom
like) male projection and negative impression, female conduit. The
male projection comprises of a head which is connected to a shaft.
The diameter of the shaft is somewhat narrower (and is positioned
axially to the head) than the diameter of the head resulting in the
lateral borders of the head protruding symmetrically laterally.
[0023] The female conduit is a negative impression of the male
projection and is comprised of a head receiving area and stem
receiving area.
[0024] In application, large individuals (larger 10% of population)
would require all three layers in position in order to provide
support for the natural curvature of their cervical spine. The
average individual (average height and weight) would only require
two layers and at the smaller end of the scale, slight individuals
would only require a single layer of support.
[0025] These variances are broad spectrum, and additional
consideration to choice of a specific number of layers would
involve consideration of multiple other factors, e.g., whether the
individual is predominantly a stomach or side sleeper, types of
inherent deformity to the spinal curvature, and, most importantly
the, individualized preference.
BRIEF DESCRIPTION OF DRAWINGS
[0026] Other objects and advantages of the invention will become
apparent from the forgoing detailed description taken in connection
with the accompanying drawings, in which:
[0027] FIG. 1 is a perspective view of the side support pillow
device of the present invention;
[0028] FIG. 2 is a side view of the side support pillow having top
and bottom leg clasps;
[0029] FIG. 3 is a top view of the side support pillow;
[0030] FIG. 4 is a perspective view of the side support pillow
being used while an individual is in the side lying position with
her thighs securely engaged within the respective clasps;
[0031] FIG. 5 is a perspective view of the side support pillow
being used while an individual is lying in the supine position;
[0032] FIG. 6 is a front view of the side support pillow; and
[0033] FIG. 7 is a side view of the side support pillow having top
and bottom leg clasps forced apart for placement between the
legs.
[0034] FIG. 8 is a perspective, exploded view taken from the front
and to the side of an alternate embodiment showing a three layered,
tongue and groove support pillow embodiment of the present
invention.
[0035] FIG. 9 is a side view of the support pillow having widthwise
grooves formed in the leg clasping channels.
[0036] FIG. 10 is a side view of the support pillow having inlays
disposed in the leg clasping channels.
[0037] FIG. 11 is a side view of the support pillow having
widthwise grooves formed in the leg clasping channels and grooves
formed in the perimeter of the support pillow at the medial
plane.
[0038] FIG. 12 is a side view of the support pillow having grooves
formed in the perimeter of the support pillow at the medial
plane.
DESCRIPTION OF THE PREFERRED EMBODIMENT
[0039] As shown in the drawings for purposes of illustration, the
invention is generally embodied in a foam pillow 20, shown in FIGS.
1-3, comprised of two outer cushioning layers 22 and 24 of
resilient foam material joined along inner surfaces 23,25,
respectively to opposite surfaces of a high density foam mat 26.
The outer surface 28 of each cushioning layer, generally
rectangular in shape from a top view as shown in FIG. 3, includes a
concave shaped surface (FIGS. 1 and 6) forming a valley 30 bounded
by side walls 32 and 34 rounded at respective peaks extending
lengthwise dimension "l", as shown in FIG. 1 along the respective
sides 36 and 38 of the pillow. Included within each cushion layer
22,24 (FIGS. 1-3) traversing the lengthwise median on opposite
sides of the inner mat are opposing C-shaped channels 40 and 42
extending in a widthwise dimension "w", as shown in FIG. 1, forming
outwardly-facing, leg clasps.
[0040] Thus, configured the pillow presents the appearance of two
crescent-shaped buttresses 44 and 46 extending along the width wise
dimension w and from top to bottom along a height dimension "h", as
shown in FIG. 1, each formed with two outer convex surfaces 48A,
48B extending in an elliptical arc about an axis L1, L2, each
defined by a focus of the elliptical arc and each of which extend
through the inside of the pillow as shown in FIGS. 1 and 2. The
C-shaped channels have four edges as shown at 56A, 56B, 56C, and
56D in FIGS. 1 and 2. Each of these four edges 56A, 56B, 56C and
56D are formed at the intersection of the two ends of the arcs of
each of the two end surfaces 48A, 48B with the two ends of the arcs
of each of the two channels 40, 42, at the ends of their inwardly
facing surfaces 50A, 50B. The four edges 56A, 56B, 56C and 56D
extend along the pillow in the width wise direction w, to form
resilient fingers which perform a clasping function as described in
greater detail below. A central stem 52, shown in FIG. 2 as lying
within the region bounded by the dashed lines 53A, 53B and having
convex-shaped elliptical arcs of curvature as shown at 54A, 54B,
connects between the two crescent shaped buttresses and form the
two surfaces 50A, 50B. The pillow, thus formed, when standing
end-to-end is bi-laterally symmetric about the lengthwise plane
formed by the central mat 26. The C-shaped channels each have an
elliptical cross-sectional shape with the major axis of each
channel 55A, 55B being parallel to the lengthwise median. The
channels extend across the pillow in the width direction w, with
one channel open to the top in the height dimension and one channel
open to the bottom, as shown in FIG. 1. As also shown in FIGS. 1
and 2, the arc of curvature of each of the C-shaped channels is
greater than 180.degree., extends along the width dimension and
appears to be like the letter "C" rotated 90.degree. so that one
channel, 40 is open upward, and the other, opposed channel 42 is
open downward. Each of the outer surfaces 48A, 48B has a
cross-sectional shape of that of a portion of an ellipse, with the
focus of each ellipse in the median and defining an axis of
rotation L1, L2. The outer surfaces 48A, 48B also extend across the
pillow in the width direction w, have an arc of curvature greater
than 180.degree., so that the arc of curvature of end 48A is open
toward the interior of the pillow, i.e., to the right as shown in
FIGS. 1 and 2, and the arc of curvature of end 48B is open toward
the interior of the pillow, i.e., to the left as shown in FIGS. 1
and 2. In FIG. 2, the four edges 56A, 56B, 56C and 56D lie between
a first plane T1 tangent to surface 50A of C-shaped channel 40 and
tangent to surface 50B of C-shaped channel 42, and a second plane
T2 tangent to surface 50A of C-shaped channel 40 and tangent to
surface 50B of C-shaped channel 42. As further shown in FIG. 2, the
first plane T1 passes through the first buttress 44, and the second
plane T2 passes through the second buttress 46. By being greater
than 180.degree., the arcs of curvature of the ends 48A, 48B extend
beyond the points of tangency at which planes T1 and T2 are tangent
to the arcs of curvature of surfaces 50A and 50B, and provide the
structure of the resilient fingers for clasping the thighs of the
user.
[0041] The central mat 26 provides a stiff center layer lengthwise
through the center of the pillow 20, bounded on opposite sides by a
comfortable outer layer 22 and 24 for contacting the legs of an
individual. The foam pillow outer material 22 and 24 is preferably
made from low density polyurethane foam of the type manufactured
using conventional techniques for foam sleeping pillows. The inner
layer or mat 26 is preferably made from high density polyurethane
foam of the type manufactured using conventional techniques for
foam gymnastic or camping floor mats. These layers may then be
molded together using conventional glue or heat bonding
techniques.
[0042] In use, the pillow 20 of the preferred embodiment can be
used to reduce spinal stress while in the side lying and supine
sleeping positions. When used for the side lying sleeping position
(FIG. 4), the inner thighs 55 of an individual are placed within
the respective clasps 40 and 42 of the pillow. Each clasp 40 and 42
includes deformable, resilient lips 56 (FIG. 7) which when forced
to spread apart, as illustrated by force lines 58, provide an
opening for receipt of an individual's thigh 55. The lips 56, when
released return to their original position in engagement thereby
hugging the respective thigh in a secure, universally-contoured
engagement. The low density foam material securely maintains the
pillow 20 between the thighs 55 throughout the sleep period by
resisting disengagement from tossing and turning by the individual
without any discomfort due to the containment of the thighs within
the respective clasps. Once in place (FIG. 4), the crescent shaped
buttresses 44 and 46 extend out from the front and back sides of
the individual respectively. The bulk of the buttresses 44 and 46
supported by the rigidity of the inner mat 26 are of sufficient
size and rigidity to resist the desire of the sleeping individual
to roll over onto the prone or supine positions. The stem 52,
secured between the thighs and further supported by the rigid
compression resistant mat 26, produces a gap between the thighs 55,
thereby resisting the natural tendency of the upper knee 60 to lie
on top of the lower knee 62. The gap between the knee, preferably
2-4 inches, relieves the torsional stress on the spine created by
the undesired rotation of the upper leg. Thus, the pillow 20 used
in the side lying position, not only prevents rotation by the
individual into an undesirable prone position, but also reduces
spinal stress while in the side lying position by displacing the
upper knee 60 in spaced apart relation to the lower knee 62.
[0043] Similarly, when used for sleeping in the supine position
(FIG. 5), the individual's legs extend traversely widthwise across
one of the concave outer surfaces 30 of the pillow. The bulk of the
pillow further enhanced by the compression resistant mat 26 causes
the knees 60 and 62 to bend at an obtuse angle to accommodate the
pillow 20 there under. With the knees bent, the lordotic curve of
the spine is reduced or eliminated thereby allowing the lower spine
to rest against the mattress or sleeping surface 64. Once again the
outer layers 22 and 24 of the pillow compress and universally
contour fit the shape of the individual's legs and underlying
sleeping surface. Although compressed, the pillow does not
uniformly support the back sides of the legs. Instead, the side
walls 32 and 34 (FIGS. 5 and 6), created by the concave upper and
lower surfaces having a stylized H-shape when viewed from an end,
compress to a greater thickness than the middle valley portions 30
of the upper and lower surfaces 28. This non-uniform distribution
of compression, ensures that bolstered knee is supported mainly by
the backsides of the thigh 55 and calf 66. This reduces any direct
pressure against the back of the knees 60 and 62 which is
undesirable. Thus, the pillow 20 when used in the supine position
reduces spinal stress by flattening out the spine, while supporting
the knees 60 and 62 by the preferred backsides of the thigh 55 and
calf 66 regions.
[0044] With reference to FIG. 8, an alternate embodiment
illustrates an effective and preferred structure and method of
customization for a between-the-knee support device 80 which solves
the problem of variation between various sizes and personal choice
of individuals.
[0045] Ideally the body should rest in the natural anatomical
position. The natural anatomical position as defined and pertaining
to the lower limb is identified with the medial malleoli (ankles)
separated by 7 inches and the medial condyles of the knees (inner
border of the knee joint) separated by 4 inches. Variations from
this norm creates abnormal strain on the femoral acetabular joint
and the sacroiliac joints respectively.
[0046] The pillow of the present invention should be used in the
side lying position where an individual can adjust the distance
between opposing knees by either varying the thickness or density
of the "stem" 82 thus maintaining the normal anatomical position.
The diameter of the leg clasps should stay constant despite varying
the diameter of the stem.
[0047] Increasing the diameter of the stem (for larger individuals)
would also necessitate increasing the general height of the bumpers
84 in order provide enough rotational support to prevent the
individual from rolling into the prone position while sleeping.
This alteration in diameter of height of both the stem 82 and
bumpers 84 can be attained by either adding or removing part of the
material making up the product. This would allow the general shape
of the product to maintained however the size (more specifically
the height) would become variable. This would maintain the
functionality of the product and yet allow customization for the
individuals needs.
[0048] Adding and removing material to alter the general height of
the product can be easiest attained by creating segments or layers,
one of which is shown at 86. These layers whether added or removed
would completely functional as different entities. Therefore the
product is divided into two components. The upper and lower body
contact regions and the functional components 88 and 90,
respectively ("FC") and removable layers are the adjustable
components ("AC") one of which is shown at 86.
[0049] An important feature is that the functional components 88,
90 act as solitary components regardless of the activity of the
adjustable component(s) 86. Thus the FC 88, 90 must be connected by
some structure, either directly or indirectly (interrupted by the
AC) to the opposing FC. Various structures for creating this
adhesion may be used, e.g., Velcro (hook and loop) fasteners,
strapping, webbing and/or elastic fasteners. The preferred
structure and method would employ the structure of the FC and AC so
that they would connect to one another in series whether the AC is
engaged or disengaged.
[0050] This preferred connection can be attained by providing
either a singular or plurality of male projections and female
conduits which would fasten the two FC's together, whether the FC's
were either connected to one another directly, or indirectly
connected through one or more of the AC's 86, thus allowing
assembled support pillow to function as a solitary unit.
[0051] By connecting these components through a series of male
projections and female layer 86, a high degree of customization is
made possible with minimum additional structure and minimum to no
loss of structural integrity of the pillow.
[0052] It is emphasized that the AC 86 can vary in number, as well
as thickness of each layer 86. The principles of the present
invention can also be used to provide various additional components
to the cushion, e.g., different sized bumpers, various sizes for
the leg clasps and so forth.
[0053] As shown in FIG. 9, a further preferred embodiment of pillow
20 includes one or more groove(s) 90 disposed in C-shaped channels
40 and 42 extending along the width dimension, the depth of which
groove(s) 90 does not reach the medial plane. Groove(s) 90 permits
expansion of the leg engaging area to better facilitate proper
placement of pillow 20 between the legs of the user. As also shown
in FIG. 9, by use of elliptical surfaces 48A and 48B, the cusps of
clasp forming C-shaped channels 40 and 42 are elongated to contact
a greater circumference of the thigh of the user thus providing
increased surface contact area resulting in enhanced resistance to
dislodging pillow 20 during normal sleep.
[0054] Referring to FIG. 10, another alternative embodiment
illustrates an effective and preferred structure of the orthopedic
support pillow 20 which solves the problem of increased sensitivity
to contact which may occur in some individuals, particularly, for
example, those who suffer from Osteoarthritis of the knees. In this
embodiment, a layer of soft foam, ViscoElastic Memory Foam being
preferred, is incorporated into the leg engaging area of the
pillow, thereby providing both support and added comfort. As shown
in FIG. 10, cavity 92 is formed in surface 50A and cavity 94 is
formed in surface 50B, of C-shaped channels 40 and 42,
respectively. Cavities 92 and 94 extend across pillow 20 in the
width dimension w and along the length dimension l in the region
between planes T1 and T2. The cavities 92 and 94 further are shaped
and adapted to receive soft foam inlays 96 and 98, respectively.
Each inlay 96 and 98 is adapted such that its exterior surface
conforms to the shape that surfaces 50A and 50B, respectively, of
the C-shaped channels 40 and 42 would have had cavities 92 and 94
not been formed. Further, the exterior surface of inlays 96 and 98
may be smooth or convoluted.
[0055] Another effective and preferred embodiment, shown in FIGS.
11 and 12, is a structure of the orthopedic pillow 20 having a
continuous or interrupted groove 91 along the perimeter of pillow
20, extending in the bisecting medial plane of the pillow formed
along the length dimension l and the width dimension w. Said
perimeter groove(s) 91 assist in grasping and proper placement of
the pillow 20 by users whose dexterity may be impaired, as by
Osteoarthritis.
[0056] It will be appreciated by those skilled in the art, that a
variety of sizes will be available to accommodate the diverse range
of human forms. Such sizes will need to consider the size of the
buttress in relation to the size and weight of the individual. In
addition, the size of the leg clasps will need to adjust to
variances in thigh diameter.
[0057] While the present invention has been described in connection
with what are presently considered to be the most practical and
preferred embodiments, it is to be understood that the invention is
not to be limited to the disclosed embodiments, but to the
contrary, is intended to cover various modifications and equivalent
arrangements included within the spirit of the invention, which are
set forth in the appended claims, and which scope is to be accorded
the broadest interpretation so as to encompass all such
modifications and equivalent structures.
* * * * *