U.S. patent number 3,916,886 [Application Number 05/450,419] was granted by the patent office on 1975-11-04 for preformed self-conforming drop foot brace.
This patent grant is currently assigned to Memorial Hospital Medical Center of Long Beach. Invention is credited to John E. Rogers.
United States Patent |
3,916,886 |
Rogers |
November 4, 1975 |
Preformed self-conforming drop foot brace
Abstract
A preformed, light weight, drop foot brace that is
self-conforming and removably positionable adjacent to the
posterior calf portion, the heel and instep of a leg of a user who
has suffered a stroke or other disability, with the brace when
employed maintaining the foot of a user in a normal walking
position relative to the leg. The brace is of such structure that
both the foot of the user and lower portion of the brace may be
disposed in a shoe without alteration or modification of the
latter. Due to the conforming nature of the brace it is
inconspicuous when worn, for the upper portion of the brace is
situated within the confines of the trouser leg of a user, and the
lower portion of the brace within a shoe.
Inventors: |
Rogers; John E. (La Habra,
CA) |
Assignee: |
Memorial Hospital Medical Center of
Long Beach (Long Beach, CA)
|
Family
ID: |
23788017 |
Appl.
No.: |
05/450,419 |
Filed: |
March 12, 1974 |
Current U.S.
Class: |
602/28;
D24/192 |
Current CPC
Class: |
A61F
5/0113 (20130101) |
Current International
Class: |
A61F
5/01 (20060101); A61F 003/00 () |
Field of
Search: |
;128/8E,8R,166,84
;5/327R |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Other References
"Ortholen, Posterior Leaf Spring Below Knee Orthosis," Orthotics
& Prosthetics, p. 29, June 1972..
|
Primary Examiner: Gaudet; Richard A.
Assistant Examiner: Yasko; J.
Attorney, Agent or Firm: Babcock; William C.
Claims
I claim:
1. An orthopedic foot drop brace defined by a single sheet of a
resilient polymerized resin of such shape as to define a first
elongate shell of concave-convex transverse cross section that has
first and second end portions, said second end portion developing
into a second shell of concave-convex cross section that is
substantially normally disposed to said first shell, said first and
second shells being self conforming and removably positionable
adjacent to the posterior calf portion, the heel and instep of a
leg of a user who has suffered a stroke or other disability to
maintain the foot of said user in a substantially normal walking
position relative to said leg, said foot brace being characterized
by said first and second shells having a continuous longitudinal
central portion of sufficient width and thickness as to prevent any
substantial pivoting of said second shell transversely relative to
said first shell, said first and second shells on opposite sides of
said longitudinal central portion including side portions of lesser
thickness than said central portion, each side portion being at
least equal in width to said central portion and said side portions
possessing sufficient memory to retain said convex-concave cross
section, with said side portions of said first and second shells
due to the positions thereof relative to said central portion
acting as stiffeners that tend to maintain said second shell
normally disposed to said first shell, and said first and second
shells due to the resiliency of said resin defining the same being
self conforming to the exterior surface of the posterior calf
portion, heel and instep; and first means for removably securing
said first shell in an abutting position relative to the exterior
surface of said posterior calf portion of said user.
2. A brace as defined in claim 1 in which said means is a resilient
band that has the ends thereof secured to opposite sides of said
first end portion of said first shell, with said band when in light
pressure contact with a forward portion of said leg serving to
maintain said first shell adjacently disposed relative to said
posterior calf portion of said user.
3. A brace as defined in claim 2 which in addition includes:
second means for removably securing said ends of said band to said
opposite sides of said first end portion.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
Preformed, self-conforming, drop foot brace.
2. Description of the Prior Art
A person who has suffered a stroke or other physical disability may
lose the control of his feet, in the sense that they tend when
unsupported, to drop downwardly in depending positions from the
legs. This condition is particularly bothersome to a person in
walking as the feet are sequentially raised from the ground or
supporting floor surface.
Various types of braces have been devised and used in the past to
prevent the dropping of a foot when a person that has suffered a
stroke or other physical disability walks, but such braces have in
the main had certain operational disadvantages. Such disadvantages
are that the prior art braces are of such structure as to require
individual fitting to the contour of a leg and associated foot of a
user, are clumsey and bulky in appearance, are unyielding in
structure, and in some instances may be used only in combination
with specially designed or modified shoes.
The primary object in devising the present invention is to supply
an inexpensive drop foot brace that is lightweight, is self
conforming to the posterior calf portion, heel, and instep of the
leg and foot of the user, is easily mounted on or removed from the
leg and foot of a user, and requires no special fitting.
Another object of the invention is to supply a drop foot brace that
positions closely to the posterior calf portion heel, and instep of
the user, and as a result is inconspicuous in that the upper
portion of the brace is concealed within the confines of a trouser
leg and the lower portion within a shoe worn by the user.
A still further object of the invention is to supply a brace
capable of being worn without the necessity of the user's shoes
being modified or constructed to a special design.
SUMMARY OF THE INVENTION
A preformed, light weight, drop foot brace that is self-conforming
and removably positionable adjacent to the posterior calf portion,
the heel, and instep of the leg of a user. The brace includes a
first elongate shell of concave, convex transverse cross section
that is adapted to be adjacently disposed to the posterior calf
portion of the leg of a user with the first shell in the upper end
portion thereof being provided with means to removably secure it in
an adjacently disposed position relative to the calf portion, and
the first shell in a lower end thereof developing into a second
shell that is normally disposed to the first shell.
The second shell is also of concave, convex transverse cross
section with the second shell so shaped as to be in abutting
supporting contact with the heel and instep of the user, and when
so disposed supporting the foot of the user in a normal walking
position. A foot of a user when so supported is prevented from
dropping downwardly relative to the leg with which it is associated
when the foot is raised from the ground or supporting surface when
the user walks.
The first and second sections of the brace are integrally formed
from a polymerized resin such as polypropylene or the like. The
first and second sections of the brace have a continuous elongate
thickened area intermediately disposed between the longitudinal
edges thereof, and this elongate area being of greater thickness
than the portions of the brace on opposite longitudinal sides
thereof. The elongate area of the first portion possesses
sufficient rigidity to maintain the first shell in an upwardly
extending position adjacent the posterior calf portion of the user.
The elongate area in the second shell, possesses sufficient
rigidity, that there is little or no tendency for the second shell
to pivot transversely relative to the first shell, and as a result
the first and second shells are at all times so maintained that the
elongate areas thereof are in longitudinal alignment. The elongate
area in the second shell in cooperation with the portions of the
second shell on opposite longitudinal sides thereof, cooperate to
remain in a substantially normal position relative to the first
shell, and by so doing maintain the foot of the user supported in
the second shell in a normal walking position relative to the leg
of the user.
The brace above described is relatively light in weight, is
generally self conforming to the contour of the posterior calf
portion, heel and instep of the user, and due to the compactness of
the brace, it is inconspicuous when worn for the upper shell of the
brace may be disposed within the confines of a trouser leg, and the
second shell concealed within the confines of a shoe worn by the
user.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side elevational view of the drop foot brace removably
secured by an encircling band to the lower leg portion of a user to
extend downwardly over the posterior calf portion, and the brace
including a second outwardly extending shell that engages the heel
and instep of the foot of the user to at all times support the foot
of the user in a normal walking position;
FIG. 2 is a front elevational view of the leg and foot of a user on
which the brace is removably mounted;
FIG. 3 is a rear elevational view of a leg of the user, with the
brace being illustrated in abutting contact with the posterior calf
portion of the leg, and the brace having a second lower shell that
supports the heel and instep of the foot of the user to prevent the
latter dropping downwardly when the foot is raised from supporting
contact with the ground or a floor surface;
FIG. 4 is a bottom plan view of the second shell of the brace
illustrated in FIGS. 1, 2 and 3; and
FIG. 5 is a top plan view of the brace taken in the line 5--5 of
FIG. 3.
DESCRIPTION OF THE PREFERRED EMBODIMENT
A user's leg A is shown in FIG. 1 on which a drop foot brace B is
removably mounted and held in position therein by fastening means
C. The brace B includes a first elongate shell 10 that has an upper
end portion 12 and lower end portion 14.
The first shell 10 as may best be seen in FIGS. 3 and 5 has an
elongate area 16 formed in substantially the center thereof, which
elongate area is a greater thickness than the portions 16a and 16b
of the first shell situated on opposite sides of the elongate area
16. The first shell 10 at the second end portion 14 thereof
develops into a second shell 18 best seen in FIGS. 3 and 4, which
second shell also has a continuation of the elongate area 16
extending the longitudinal length thereof. The second shell has
side portions 18a and 18b situated in opposite longitudinal sides
of the area 16.
The side portions 16a and 16b are resilient, but sufficiently
pliable as to be drawn into conforming engagement with the
posterior calf portion 20 of the user's leg A, when the fastening
means C are lightly tensioned. The elongate area 16 of the second
section 18 in cooperation with the side portions 18a and 18b,
maintain the second shell 18 in a substantially normal position
relative to the first shell 10 as shown in FIG. 1 when on the foot
22 of the user is held in a substantially normal walking position
relative to the calf portion 20. The side portions 18a and 18b
terminate in longitudinal upwardly and rearwardly extending edges
24 that are situated adjacent the ankle bones 26 of the leg A.
The side portion 16a at the upper portion thereof as may be seen in
FIG. 1 has a doubled over fabric tab 28 sewed or otherwise affixed
thereto, with the tab pivotally engaging and supporting an elongate
rigid loop 30. The side portion 16b opposite the tab 28 has a first
end 32 of an elongate resilient band 34 secured thereto, which band
may be extended through the loop 30 as shown in FIG. 5.
The second end portion 34a of the band supports a first pad 36 of a
pressure sensitive adhering material such as "Velcro" or the like
that may be placed in engagement with a second pad 38 of the same
material that is supported on the band 34. When the band 34 is
doubled over as shown in FIG. 5, the pads 36 and 38 are adjacently
disposed, and in removable engagement and the fastening means C
removably held in a partial leg encircling position as shown in
FIG. 1.
By varying the lengths of the portion of the band 34 relative to
the loop 30, the overall length of the band 34 may be adjusted
relative to a user's leg A to hold the first shell 10 in light
abutting contact with the posterior calf portion of the user. The
elongate area 10 of first shell 10 is of sufficient rigidity to
maintain the first shell in the upwardly extending position on leg
A, even though the first shell is not in full surface contact with
the posterior calf portion 20 of the user's leg.
The drop foot leg brace B is preferably formed as an integral unit
from a sheet of polymerized resin, such as polypropylene,
polyethylene or the like, and the brace being formed by heating the
sheet and then forming it to the configuration illustrated in FIGS.
4 and 5. The forming of the sheet is preferably done by heating the
sheet and stretching it over a suitable mold. However, prior to
such stretching taking place, a clamp is placed in pressure
engagement with the sheet to hold the part of the sheet that is to
constitute the elongate area 16 in pressure contact with the mold.
Thus, although the portions of the sheet on each side of the
elongate area 16 are stretched and thinned, the elongate area 16
remains unstretched and in its original thickness.
The portion 16a and 16b while possessing some resiliency are
sufficiently pliable to conform to the surface of the posterior
calf portion of the user A and this is also true of the portions
18a and 18b that are adapted to conform to the heel and instep
portion of the foot 22.
The second shell 18 prevents the foot 22 from dropping downwardly
relative to the user's leg A but permits the foot to flex
upwardly.
The use and operation of the invention has been described
previously in detail and need not be repeated.
* * * * *