U.S. patent number 3,859,991 [Application Number 05/412,346] was granted by the patent office on 1975-01-14 for leg brace.
This patent grant is currently assigned to Sudbury Engineering. Invention is credited to Peter Theodores.
United States Patent |
3,859,991 |
Theodores |
January 14, 1975 |
LEG BRACE
Abstract
A leg brace of the drop-foot type having a calf band joined by
two generally parallel rods to a shoe clamp.
Inventors: |
Theodores; Peter (Dudley,
MA) |
Assignee: |
Sudbury Engineering (Sudbury,
MA)
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Family
ID: |
26922942 |
Appl.
No.: |
05/412,346 |
Filed: |
November 2, 1973 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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229101 |
Feb 24, 1972 |
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Current U.S.
Class: |
602/28 |
Current CPC
Class: |
A61F
5/0113 (20130101) |
Current International
Class: |
A61F
3/00 (20060101); A61f 003/00 () |
Field of
Search: |
;128/8E,8F,8R,8A,8B |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Gaudet; Richard A.
Assistant Examiner: Yasko; J.
Attorney, Agent or Firm: Blodgett; Norman S. Blodgett; Gerry
A.
Parent Case Text
This is a continuation of application Ser. No. 229,101 filed Feb.
24, 1972 now abandoned.
Claims
The invention having been thus described, what is claimed as new
and desired to secure by Letters Patent is:
1. A leg brace, comprising:
a. a band adapted to be attached to the calf of the user,
b. a clamp consisting of two parts each having a flange for
engagement with an edge of the sole of the shoe of the user and of
means for drawing the parts together to clamp the sole between the
flanges, and
c. a pair of bowed rods of springy material each having a first end
attached to the band and a second end fixed to the clamp, so that
the band and clamp are resiliently connected, the first end being
attached to the band by a connection structure which rigidly fixed
the position of the first end with respect to the band and said
connection structure including means which allows selective
adjustment of the position either longitudinally or transversely of
the rod.
2. A leg brace as recited in claim 1, wherein the clamp has a
rearward edge and a forward edge, and the rods are attached to the
clamp in the vicinity of the forward edge.
3. A leg brace as recited in claim 1, in combination with a shoe
wherein the sole of the shoe has a heel, the heel has a forward
edge, and the flange extends rearwardly of the forward edge of the
heel and engages the sole of the shoe rearwardly of the forward
edge of the heel.
4. A leg brace as recited in claim 1, in combination with a shoe
wherein the clamp is provided with spikes which extend downwardly
from the clamp away from the sole of the shoe.
Description
BACKGROUND OF THE INVENTION
There are several diseases in which the condition known as
"drop-foot" occurs, such as chronic polymyositis. With this
condition, the patient is unable to articulate the foot about the
horizontal axis, so that it hangs limply in a downward direction.
This makes it difficult for the patient to walk, even when crutches
are used, because of the foot hanging down and striking thresholds
and other raised objects. For this purpose, a special leg device
known as a "drop-foot brace" is used, which acts on the foot to
bias it in the upward direction, so that the heel of the shoe is
the lowermost part of the foot, and this makes it easier for the
patient to walk. In the past, these braces have been manufactured
from heavy steel elements by a highly skilled artisan. In many
cases, the patient has had to wait several days in a large city in
order to obtain a fitting. Because the braces are, in effect,
custom made, they are also quite expensive. Furthermore, they
become part of the shoe, so that the only pair of shoes which the
patient can use is a pair which forms part of the brace. The
fitting of braces normally requires a hard leather soled shoe.
Also, since the braces are quite expensive, it is not possible for
the patient to own spare braces without a considerable expenditure
of money. This means that, if a brace becomes inoperative (as they
often do), the patient may not have a suitable brace for a
considerable period of time before repairs are made or before he is
able to obtain a replacement for the brace. Frequently, during
trial of a newly fitted pair of braces, it is necessary for the
patient to return to the fitter for fine adjustment, particularly
to correct irritating interferences in the area of the ankle bones.
These and other difficulties experienced with the prior art devices
have been obviated in a novel manner by the present invention.
It is, therefore, an outstanding object of the invention to provide
a leg brace which is light in weight, inconspicuous, and yet which
performs its function satisfactorily.
Another object of the present invention is the provision of a leg
brace which can be used with conventional shoes and which can be
easily changed from one shoe to another in a very short time
without the need for mechanical skill.
A further object of the present invention is the provision of a leg
brace of the drop-foot type made up of a number of inexpensive
simple elements that are readily interchangeable, so that a patient
can keep spare parts and repair his brace readily.
It is another object of the instant invention to provide a leg
brace having sufficient vertical and horizontal adjusting means so
that it can be applied to a wide range of patients without the need
for custom fitting, and with sufficient clearance around the ankle
bones.
A still further object of the invention is the provision of a leg
brace which is simple in construction, which can be inexpensively
manufactured from commonly available materials, and which is
capable of a long life of useful service with a minimum of
maintenance.
Another object of this invention is its suitability to a broad
variety of shoe styles including many which were not adaptable to
other designs.
With these and other objects in view, as will be apparent to those
skilled in the art, the invention resides in the combination of
parts set forth in the specification and covered by the claims
appended hereto.
SUMMARY OF THE INVENTION
In general, the invention consists of a leg brace having a band
adapted to be attached to the calf of the user and a pair of spring
wire rods each connected at one end to the band. The other ends of
the spring wire rods are connected to a clamp consisting of two
parts, each having a flange for engagement with an edge of the sole
of the shoe of the user, and of screw means for drawing the parts
together to clamp the sole between the flanges.
More specifically, each part of the clamp has a transverse integral
sleeve at one end and each rod is provided with a right angle
portion at its lower end, which portion lies in the integral
sleeve. The inner end of each right angle portion is provided with
a locking portion extending at a right angle thereto and underlying
the said screw means.
BRIEF DESCRIPTION OF THE DRAWINGS
The character of the invention, however, may be best understood by
reference to one of its structural forms, as illustrated by the
accompanying drawings, in which:
FIG. 1 is a perspective view of a leg brace embodying the
principles of the present invention,
FIG. 2 is a bottom plan view of a portion of the brace,
FIG. 3 is a sectional view of the brace taken on the line IV-IV of
FIG. 2, and
FIG. 4 is a sectional view of the brace taken on the line IV--IV of
FIG. 2.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring first to FIG. 1, wherein are best shown the general
features of the invention, a leg brace, indicated generally by the
reference numeral 10, is shown in use on a leg 11 of the user who
is also wearing a shoe 12. As is evident in the drawing, the leg
brace consists of three major parts, namely, a band 13, a rod 14,
and a clamp 15. It should be noted that, in the description which
follows, the expressions "longitudinal," "transverse," "vertical,"
and so forth are used in the sense that these terms are normally
used in connection with the shoe 12.
It can be seen that the calf band 13 consists of a U-shaped metal
clip 16, the inner surface of which is covered with a padding 17.
Each leg of the U-shaped clip 16 is provided with a slot 22 which
is carried a bolt 23. The nuts associated with this bolt lies on
the inside of the clip and is of a thin nature, so that it lies
under the padding (between the padding and the clip) and provide no
bulge to the padding.
The bolt 23 is of the cross-sloted round-head type. The rod 14
extends up one side of a plate 18 having a lot 21 lying under the
head of the screw 23. It is held in a vertical ferrole formed on a
vertical edge of the plate 18. It will be understood that two such
rods 14 are provided, one on each side of the band 13 and each
provided with a plate and screw similar to the plate 18 and the
screw 23 and with associated slots. In this figure of the drawings,
it can also be seen that each of the rods 14 is provided at its
lower end with a gently curved portion 26 leading to the clamp
15.
Referring now to FIGS. 2, 3, and 4, it can be seen that the clamp
15 consists of two portions 27 and 28 operating on the sole 31 of
the shoe 12 adjacent the heel 29; that is to say, on the instep of
the shoe. Joining the two portions 27 and 28 is screw means 32.
Bolts 33 and 34 extend transversely through a longitudinal,
downwardly depending flange 35, which is integral with and extends
along a longitudinal side of the generally rectanngular portion 27
of the clamp. A similar flange 36 is integrally formed with the
inner edge of the rectangular portion 28 of the clamp adjacent the
flange 35 and extends downwardly and longitudinally therefrom. The
bolts 33 and 34 engage the threaded interior of two sleeves 37 and
38 which are aligned with them and which are integrally attached to
the face of the flange 36. The longitudinal edge of the portion 27
of the clamp which lies along the outside of the shoe and which is
parallel to the flange 35, is provided with an upwardly extending
flange 39 adapted to lie along the adjacent edge of the sole 31 of
the shoe. This flange 39 is integral with the portion 27 and
extends upwardly from it and is provided at its upper edge with an
inwardly directed flange 41. The flange 41 is, therefore, parallel
to the main part of the portion 27 of the clamp and is spaced from
it approximately the thickness of the sole 31. Similarly, the
opposite edge of the portion 28 of the clamp is provided with an
upwardly extending integral flange 42 which is intended to lie
against the other side of the sole 31. From the top of this flange
extends an inwardly extending flange 43 adapted to lie along the
top surface of the sole. The flange 43 is, of course, spaced and
parallel to the main part of the portion 28 of the clamp.
The rearward transverse edge of the portion 28 is provided with an
integral sleeve 45 which extends transversely of the shoe. It lies
adjacent the forward edge of the heel 29. The lower end of the rod
14 on one side (that is to say, at the bottom of the curved portion
26) is bent inwardly to form a right angle portion which extends
through the sleeve 45. After this portion leaves the sleeve 45, it
may be bent again at a right angle to form a locking portion, which
lies in contact with the upper parts of the sleeves 37 and 38. It
lies between these sleeves and the undersurface of the sole 31 of
the shoe. The extreme end of the locking portion can be formed with
a hook which extends around the body of the sleeve 38. In a similar
way, the lower end of the other rod 14 can be provided with a right
angle portion which lies in a sleeve 48 integral with the rearward
transverse edge of the portion 27 of the clamp and extending
transversely thereof. The right angle portion terminates in a
locking position which extends longitudinally along the upper side
of the bolts 33 and 34 adjacent the flange 35. The extreme main
horizontal parts of the portions 27 and 28 of the clamp may be
provided on occasion with spikes 51 which are long enough to extend
beyond the plane of the shoe defined by the undersurface of the
heel 29 and the undersurface of the toe portion of the sole 31.
The operation of the invention will now be readily understood in
view of the above description. The clamp 15 is fastened to the shoe
of the user before he puts it on his leg. The shoe is then placed
on the patient's foot with the band 13 extending around his calf.
If this is the first time that the brace is being worn, it may be
necessary to loosen the screws 23, so that the calf band 13 can be
moved within the limits of the slots 21 and 22 at the top ends of
the rods 14, and so that the band can be moved, if necessary,
laterally or vertically of the rods. The bend 26 is made to avoid
contact with ankle bone. It is very unlikely that the rod will need
to be bent after braces are made. Mounting the clamp 15 on the shoe
originally takes place by placing the portions 27 and 28 against
the undersurface of the sole 31 of the shoe 12 and then tightening
the bolts 33 and 34. This serves to bring the flanges 41 and 43
over the top edges of the sole 31 into the wedge-like recess
between the top of the sole and the upper of the shoe. All of the
elements of the clamp are of such a size that it is able to lie
within the instep without touching the floor. This is with the
exception of the spikes 51 which may be added during icy weather to
give better traction.
It can be seen that the present invention provides a leg brace
which is very light in weight and inconspicuous and which can be
transferred from one pair of shoes to another. Furthermore, it is
made up of relatively simple inexpensive parts that can be replaced
when necessary very easily and with a minimum of mechanical
aptitude.
It is obvious that minor changes may be made in the form and
construction of the invention without departing from the material
spirit thereof. It is not, however, desired to confine the
invention to the exact form herein shown and described, but it is
desired to include all such as properly come within the scope
claimed.
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