U.S. patent number 3,799,158 [Application Number 05/187,021] was granted by the patent office on 1974-03-26 for knee brace.
Invention is credited to Harris L. Gardner.
United States Patent |
3,799,158 |
Gardner |
March 26, 1974 |
KNEE BRACE
Abstract
A knee brace having perforated upper and lower members coated
with a soft plastic material and adapted to take the form of and to
be secured to the leg of a user above and below the knee. A
semi-ball joint attaches the upper and lower members and provides
free pivotal rotation while restricting lateral rotation.
Reinforcing ribs are formed on the upper and lower members to
provide rigidity along a line parallel to the leg.
Inventors: |
Gardner; Harris L. (Cranston,
RI) |
Family
ID: |
22687292 |
Appl.
No.: |
05/187,021 |
Filed: |
October 6, 1971 |
Current U.S.
Class: |
602/16; 602/26;
128/DIG.14 |
Current CPC
Class: |
A61F
5/0125 (20130101); Y10S 128/14 (20130101) |
Current International
Class: |
A61F
5/01 (20060101); A61f 003/00 () |
Field of
Search: |
;128/8C,85,87,88,DIG.14
;2/22 ;287/12,14 ;85/5R,32R |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Gaudet; Richard A.
Assistant Examiner: Yasko; J.
Attorney, Agent or Firm: Salter & Michaelson
Claims
What is claimed is:
1. A knee brace comprising upper and lower members adapted to
snugly fit on a side of a person's leg above and below the knee,
respectively, each of said members having laterally extending
portions at opposite sides thereof, said members and their
laterally extending portions being curved so as to generally define
a semicircle in cross section, whereby when said brace is worn,
said lateral portions extend across the front and rear of the
wearer's leg above and below the knee, said members being
constructed of a malleable metallic material so as to be readily
deformable to be shaped to the leg of the wearer, a soft plastic
coating covering said metallic material, a plurality of
perforations in each of said members of sufficient size to permit
the wearer's skin to protrude therethrough and at the same time to
enhance the deformability of said members, and means pivotally
interconnecting said members to each other, said pivotal means
comprising semispherical-shaped overlapping portions on said upper
and lower members, a semi-spherical washer formed of a
self-lubricating material positioned between said overlapping
portions, said overlapping portions and said washer having aligned,
centrally located openings, a semi-spherical member overlying the
outermost semi-spherical portion and having a centrally positioned
threaded stud extending inwardly through said openings, and a
threaded semi-spherical inner member formed of self-lubricating
material threadedly engaging said stud to maintain said overlapping
portions and said washer in assembled relation.
2. The knee brace of claim 1 further characterized in that each of
said members has an imperforate ribbed portion extending from top
to bottom thereof at substantially the central portion of said
members.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to protective devices and more particularly
to a knee brace for preventing injury to a knee and for aiding in
the healing of an injured knee.
2. Description of a Prior Art
Heretofore knee braces for protecting a knee from injury have been
extremely bulky and had a tendency to interfere with the natural
movement of the knee. The braces of the prior art have been
excessively heavy and have suffered from an inability to remain in
their proper position adjacent the knee of a user. The knee braces
of the prior art had a tendency to slip out of place and severely
interfere with the proper and natural action of the knee. The prior
art knee braces also had a tendency to chafe the skin and cause
bruises.
SUMMARY OF THE INVENTION
The present invention contemplates a knee brace having an upper and
lower member formed of a semi-soft material such as aluminum. The
portions are coated with a soft plastic material that prevents
chafing and bruising of the skin. The upper and lower members have
perforations formed therein which serve a dual function. Firstly,
the perforations add to the malleability of the soft aluminum so
that the upper and lower portions may be shaped to fit the contour
of the leg. Secondly, the perforations assist in stabilizing the
knee brace when it is secured to a leg. Each perforation provides a
pocket through which a small portion of the skin and flesh protrude
to prevent movement of the knee brace over the skin. A reinforcing
rib is formed on each member and extends in a direction parallel to
the leg to add rigidity to the brace and to protect against lateral
blows.
A uniquely structured semi-ball joint allows free and unrestricted
pivotal rotation but severely limits lateral rotation thereby
protecting the knee from lateral blows while allowing the knee to
bend naturally.
The knee brace wraps around the leg below the knee cap where the
brace forms a slight radius to protect the knee cap.
Thus, the present invention provides a lightweight knee brace that
allows free mobility in the normal rotational direction of the knee
while providing for a very slight amount of lateral rotation so
that an athlete is assured full use and mobility of his knee. The
knee brace may be shaped to fit any leg and the perforations assure
that the brace remains in a position on the leg without slipping.
The soft plastic coating eliminates the chafing and bruises
associated with devices of the prior art.
One objective of the present invention is to provide a knee brace
that gives the athlete full use of the natural knee mobility.
Another objective of the present invention is to provide a
lightweight knee brace that is sufficiently strong to protect
against lateral blows.
Another objective of the present invention is to provide a knee
brace that does not slip and move out of place once it is secured
to the leg of a user.
Another objective of the present invention is to provide a knee
brace that provides some degree of protection to the knee cap.
The foregoing and other objectives and advantages of the invention
will appear more fully hereinafter from a consideration of the
detailed description which follows, taken together with the
accompanying drawings wherein one embodiment of the invention is
illustrated by way of example. It is to be expressly understood,
however, that the drawings are for illustrative purposes only and
are not to be considered as defining the limits of the
invention.
DESCRIPTION OF THE DRAWINGS
FIG. 1 shows the knee brace of the present invention positioned on
the leg of an athlete.
FIG. 2 is an end view of the knee brace of the present
invention.
FIG. 3 is a plan view of the knee brace of the present
invention.
FIG. 4 is a partial sectional view taken along line 4--4 of FIG.
3.
DESCRIPTION OF THE INVENTION
Referring to FIG. 1 there is shown the knee brace of the present
invention having an upper member 1 and a lower member 2 connected
by a semi-ball joint 3. Member 1 is adapted to be secured to a
position on the leg of an athlete above the knee and member 2 to a
position on the leg below the knee. The upper and lower portions
are formed of malleable aluminum, having a thickness of 0.050 to
0.063 of an inch, such as No. 50-52 aluminum. Perforations 11 are
formed in both the upper and lower members to increase the
malleability of the aluminum and to anchor the knee brace on the
leg in a manner which will be described subsequently. Because of
the malleability of the aluminum, which is enhanced by the
perforations, the members of the knee brace may be shaped to
perfectly fit the contour of the leg of a user.
The knee brace is coated with a soft foam like plastic material to
cushion the knee brace and protect the leg from becoming chaffed
and bruised.
Upper and lower members 1 and 2 each have formed thereon a
reinforcing rib 7 extending in a direction parallel to the portion
of the leg of the user to which it is secured. The reinforcing ribs
increase the strength of the knee brace so that it can withstand
severe lateral blows to which it will be subjected.
Members 1 and 2 of the knee brace are connected by semi-ball joint
3 which is most clearly shown in FIG. 4. Semi-ball joint 3
comprises a semi-spherical member 8 having semi-spherical outer and
inner surfaces and a threaded stud 6 extending from the center of
the inner semi-spherical surface. Upper and lower members 1 and 2
have semi-spherical shaped portions 9 and 10 respectively which are
overlapped and separated by a semi-spherical self lubricating
washer 4 such as Nylon. Washer 4 and portions 9 and 10 have a hole
formed therein for receiving stud 6 and a self lubricating member 5
is threaded onto stud 6 to hold washer 4 and portions 9 and 10 in
place to form the semi-ball joint. Washer 4 provides a smooth
bearing surface between semi-spherical portions 9 and 10 to
facilitate ease of pivotal rotation. Likewise member 5 is formed of
a self lubricating material to provide a low friction bearing
surface between member 5 and semi-spherical portion 9. It is to be
understood that the invention is not limited to the use of threaded
stud 6 and threaded member 5. Other locking methods could be used
such as a split washer.
The use of self lubricating members such as Nylon provides for a
highly efficient pivot point that allows free pivotal rotation
about the axis of stud 6 and does not obstruct the natural mobility
of the athlete's knee. The semi-ball joint also provides for a
slight amount of lateral rotation that approximates the natural
lateral rotation of the knee. It is to be understood that this
lateral rotation is severely limited so that the brace does provide
protection against severe lateral blows.
In use the brace is strapped onto the outer portion of the leg of
an athlete in any convenient manner. Conventional adhesive tape may
be used or in lieu thereof straps provided with Velcro fasteners
may be used. When the brace is secured to the leg of the user the
skin and flesh of the leg protrude slightly into perforations 11
and tend to anchor the knee brace in place to prevent slippage. It
is to be noted that when the knee brace is in position on the leg
of a user the front portion of lower member 2 extends beneath the
knee cap and provides a limited amount of protection for the knee
cap. Frontal blows will tend to glance off of this portion rather
than being absorbed by the knee cap.
Thus, the present invention provides a knee brace that is extremely
compact and light in weight and allows for the full natural
mobility of an athlete's knee while at the same time providing
protection against severe lateral blows. The knee brace is coated
with a soft plastic material to prevent chafing and bruising of the
athlete's leg. The knee brace is prevented from slipping by the
unique use of perforations that anchor the knee brace in place. The
perforations also add to the malleability of the knee brace so that
it may be shaped to properly fit the leg of the athlete .
* * * * *