# Patent

## Title
Ankle brace

## Abstract

An ankle brace has a stirrup with a flat bottom portion and a first and second upright leg. Each of the first and second upright legs has an upper end and a lower end, the upper end having a circular opening therethrough and the lower end attached to the flat bottom portion. First and second pivot legs, each having a circular opening therethrough, are releasably and rotatably connected to the first and second upright legs respectively. When connected, the circular openings in the pivot legs overlap the respective circular openings in the upright legs, and each pivot leg is rotatable about an axis through and perpendicular to the pivot leg circular opening. The circular openings in the first and second upright legs are positioned and sufficiently large to allow at least a portion of the malleolus bone of an ankle to protrude therethrough.

## Background
BACKGROUND OF THE INVENTIVE CONCEPTS
1. Field of the Inventive Concepts
The inventive concepts disclosed and claimed herein relate generally to orthopedic devices, and more particularly, but not by way of limitation, to an ankle brace.
2. Brief Description of Related Art
Ankle injuries are among the most common injuries in sports. When an ankle is injured, the traditional methods for promoting healing include application of pressure to the area to reduce swelling and to prevent movement of the ankle. The current trend in medicine now is to promote exercise as soon as possible after an ankle injury. It is therefore desirable to provide an orthopedic device or orthosis which allows exercise of the injured ankle while additionally resisting mobility in the direction which would irritate the injury.
An ankle orthosis is typically a brace that surrounds the ankle and provides pressure while controlling the ankle movement. The orthosis can be designed to allow forward and backward flexing while preventing lateral movement of the ankle, i.e., inward and outward flexing. This is accomplished using a brace with upper and lower portions hinged at the ankle bone position allowing the brace to pivot backwards and forwards. Unfortunately, location of a hinge or rivet adjacent the ankle bone can cause pressure, rubbing and irritation of the protruding ankle bones.
To alleviate the pressure on and irritation to the ankle bones, one prior art device utilizes a circular hinge with hinge openings sufficiently large to accommodate protrusion of the ankle bone (see U.S. Pat. No. 4,665,904). Unfortunately, this circular hinge device is not separable. Ankle braces having a separable hinge, such as the brace described in U.S. Pat. No. 6,146,350, can be less difficult to manufacture in that separate steps are not required to connect the upper and lower portions of the brace. A separable hinge design also allows a wearer to remove the upper portion of the brace while leaving the lower portion inserted in the shoe for storage. However, prior art ankle braces having detachable hinges are bulky and require the detachable hinge surface to rotate about the ankle bone when worn, causing irritation as described above.
In view of the foregoing, there is a need for a less bulky ankle brace having upper and lower portions that are releasably and rotatably connected about the ankle bone area, while reducing or eliminating contact of the hinge surface with the ankle bone. It is to such a comfortable and user-friendly ankle brace design that the presently disclosed and claimed inventive concept(s) is directed.
SUMMARY OF THE INVENTIVE CONCEPTS
The inventive concepts disclosed and claimed herein generally relate to an ankle brace. The ankle brace has a stirrup and first and second pivot legs. The stirrup has a flat bottom portion and a first and second upright leg. Each of the first and second upright legs has an upper end with a circular opening therethrough, and a lower end that attaches to the flat bottom portion. The first and second pivot legs each have a circular opening therethrough and are releasably and rotatably connected to the first and second upright legs respectively. When connected, the circular openings in the pivot legs overlap the respective circular openings in the upright legs, and each pivot leg is rotatable about an axis through and perpendicular to the pivot leg circular opening. When the ankle brace is worn, the circular openings in the first and second upright legs are positioned and sufficiently large to allow at least a portion of the malleolus bone of an ankle to protrude therethrough.



BRIEF DESCRIPTION OF THE DRAWINGS
Like reference numerals in the figures represent and refer to the same or similar element or function. Implementations of the disclosure may be better understood when consideration is given to the following detailed description thereof. Such description makes reference to the annexed pictorial illustrations, schematics, graphs, and drawings. The figures are not necessarily the scale and certain features and certain views of the figures may be shown exaggerated, to scale or in schematic in the interest of clarity and conciseness. In the drawings:
FIG. 1 is a perspective view of an ankle brace constructed in accordance with the inventive concepts disclosed herein.
FIG. 2 is a sectional view of a hinge assembly of the ankle brace.
FIG. 3 is a sectional view of a hinge assembly for another embodiment of the ankle brace.
FIG. 4 is a sectional view of a removable grommet and retaining member for use in an embodiment of the ankle brace.
FIGS. 5A and 5B illustrate the snug fit obtained using an ankle brace constructed in accordance with the inventive concepts disclosed herein compared to the bulkiness of a prior art ankle brace.
FIG. 6 is a sectional view of a hinge assembly for yet another embodiment of the ankle brace.



DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS
Before explaining at least one embodiment of the inventive concepts disclosed herein in detail, it is to be understood that the inventive concepts are not limited in their application to the details of construction, experiments, exemplary data, and/or the arrangement of the components set forth in the following description, or illustrated in the drawings. The presently disclosed and claimed inventive concepts are capable of other embodiments or of being practiced or carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein is for purpose of description only and should not be regarded as limiting in any way.
In the following detailed description of embodiments of the inventive concepts, numerous specific details are set forth in order to provide a more thorough understanding of the inventive concepts. However, it will be apparent to one of ordinary skill in the art that the inventive concepts within the disclosure may be practiced without these specific details. In other instances, well-known features have not been described in detail to avoid unnecessarily complicating the instant disclosure.
Further, unless expressly stated to the contrary, “or” refers to an inclusive or and not to an exclusive or. For example, a condition A or B is satisfied by anyone of the following: A is true (or present) and B is false (or not present), A is false (or not present) and B is true (or present), and both A and B are true (or present).
In addition, use of the “a” or “an” are employed to describe elements and components of the embodiments herein. This is done merely for convenience and to give a general sense of the inventive concept. This description should be read to include one or at least one and the singular also includes the plural unless it is obvious that it is meant otherwise.
Use of the term “malleolus” refers to either of the two rounded prominences or protuberances on either side of the ankle joint. The lateral (or fibular, external, or outer) malleolus is at the lower end of the fibula and the medial (or tibial, internal, or inner) malleolus is at the lower end of the tibia.
Finally, as used herein any reference to “one embodiment” or “an embodiment” means that a particular element, feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. The appearances of the phrase “in one embodiment” in various places in the specification are not necessarily all referring to the same embodiment.
Referring now to the drawings, and more particularly to FIG. 1, shown therein is an exemplary embodiment of an ankle brace 10 constructed in accordance with the inventive concepts disclosed and claimed herein. The ankle brace 10 has a stirrup 12, a first pivot leg 14 and a second pivot leg 16. The stirrup 12 has a flat bottom portion 18, a first upright leg 20 and second upright leg 22. The first upright leg 20 has a first upper end 24 with a first circular opening 26 therethrough, and a first lower end 28 that attaches to the flat bottom portion 18. The first pivot leg 14 has a first circular pivot opening 30 therethrough and is releasably and rotatably connected to the first upright leg 20. When connected, the first circular pivot opening 30 overlaps the first circular opening 26 and the first pivot leg 14 is rotatable about an axis 32 through and perpendicular to the first circular pivot opening 30.
Similarly, the second upright leg 22 has a second upper end 34 with a second circular opening 36 therethrough, and a second lower end 38 that attaches to the flat bottom portion 18. The second pivot leg 16 has a second circular pivot opening 40 therethrough and is releasably and rotatably connected to the second upright leg 22. When connected, the second circular pivot opening 40 overlaps the second circular opening 36 and the second pivot leg 16 is rotatable about an axis 32′ through and perpendicular to the second circular pivot opening 40. When the ankle brace 10 is worn, the first and second circular openings 26 and 36, respectively, are positioned and sufficiently large to allow at least a portion of the malleolus of an ankle to protrude therethrough. Thus the ankle brace 10 pivots along the same axis as the foot, allowing forward and backward flexing (plantar flexion and dorsiflexion) while limiting inward and outward flexing (inversion and eversion) and reducing or eliminating irritation due to contact of the hinge surface with the ankle bone.
The stirrup 12 can be a single integral piece formed to define the flat bottom portion 18 and the first and second upright legs 20 and 22, respectively. The first and second upright legs 20 and 22 extend substantially vertically from the flat bottom portion 18. The stirrup 12 conforms closely to the shape of the foot and can be worn inside the user's shoe. In one embodiment, the first and second upright legs 20 and 22 are mirror images of each other, allowing a right ankle brace to be interchangeable with a left ankle brace. In another embodiment, the first and second upright legs 20 and 22, respectively, are not mirror images and can be slightly offset to compensate for a slight pronation or supination.
The stirrup 12 and the first and second pivot legs 14 and 16, respectively, can be made of any material providing semi-rigid support without irritating the wearer's skin. In one embodiment, the stirrup 12 and the first and second pivot legs 14 and 16, respectively, are made of a semi-rigid, thin wall thermoplastic such as polyethylene, polyurethane, polypropylene, polycarbonate, and/or acrylic. In another embodiment, these components are made of polyethylene.
In one embodiment, the first pivot leg 14 is releasably and rotatably connected to the first upright leg 20 using a hinge assembly 42. Because the second pivot leg 16 can be releasably and rotatably connected to the second upright leg 22 using an identical hinge assembly, only one hinge assembly 42 will be described. Referring now to FIG. 2, the first pivot leg 14 can include a round neck 44 about the first circular pivot opening 30. The neck 44 can be an integral part of the first pivot leg 14 and provides a pivot surface 46 on which the first upright leg 20 and the first pivot leg 14 can rotate about the axis 32. The first upright leg 20 is rotatably secured to the first pivot leg 14 using a retaining member 48. A user can remove the retaining member 48 from the neck 44 to disconnect the first upright leg 20 from the first pivot leg 14.
In the embodiment shown in FIG. 2, the retaining member 48 is internally threaded and sized to receive an externally threaded neck 44. The retaining member 48 can be configured as a collar 50 with a retaining surface 52 positionable adjacent a perimeter 54 of the first circular opening 26. A wearer can readily secure or remove the first pivot leg 14 by attaching or removing the collar 50.
While the retaining member 48 is shown in FIG. 2 as an open collar 50 threadingly securing the first pivot leg 14 to the first upright leg 20, other shapes and mechanisms of attachment can be used. For example, the retaining member 48 can include an end cap 56 and can utilize a snap fit attachment mechanism as shown in FIG. 3. The snap fit can be achieved, for example, by using an annular ring 58 along an outer edge 60 of the tubular neck 44 on a grommet 62 such that compression of the retaining member 48 against the grommet 62 causes the annular ring 58 to snap fit within an annular groove 64 on the retaining member 48. Addition of the end cap 56, while adding bulk to the overall ankle brace 10, can provide additional structural integrity to the retaining member 48 while still maintaining an open space for the malleolus.
The tubular neck 44 of the grommet 62 can be sized to fit through the first circular pivot opening 30 and the first circular opening 26, while a flange 66 of the grommet 62 is sized larger than the openings 30 and 26, respectively, to act as a stop. To attach the first pivot leg 14 to the first upright leg 20, the outer edge 60 of the grommet 62 can be inserted through the first circular pivot opening 30 in the first pivot leg 14 and through the first circular opening 26 in the first upright leg 20. The retaining member 48 can then be snapped onto the outer edge 60 of the grommet 62. Thus the flange 66 retains the grommet 62 on one side of the hinge assembly 42 while the retaining member 48 retains the grommet on the opposite side of the hinge assembly 42. The pivot surface 46 allows rotation of the first pivot leg 14 with respect to the first upright leg 20. If desired, the flange 66 can be glued or otherwise made to adhere to the first pivot leg 14 causing the flange 66 to rotate with the first pivot leg 14.
FIG. 4 shows another variation of a hinge assembly 42 having a removable grommet 62 and retaining member 48. The tubular neck 44 of the grommet 62 is shown as internally-threaded and sized to receive an externally threaded tubular portion 68 of the retaining member 48. The external surface of the tubular neck 44 provides the pivot surface 46 on which the first upright leg 20 and the first pivot leg 14 can rotate. Assembly and disassembly of the hinge 42′ can be accomplished as described above with screw tightening of the retaining member 48 rather than with a snap fit.
The first and second circular pivot openings 30 and 40, respectively, as well as the first and second circular openings 26 and 36, respectively, are sized to accommodate protrusion of the malleolus or ankle bone. In one embodiment, the inside diameters 70 and 72 of the first circular pivot opening 30 and the first circular opening 26, respectively, are between 11⁄4 inches and 21⁄2 inches. When the ankle brace 10 is designed as in FIG. 2 with the neck 44 an integral part of the first pivot leg 14, then the inside diameter 72 of the first circular opening 26 is slightly larger than the inside diameter 70 of the first circular pivot opening 30 to accommodate insertion of the neck 44 therethrough.
The ankle brace 10 can be secured and tightened to a wearer's lower leg and ankle using a variety of strap-type fasteners which can circumscribe at least a portion of the first and second pivot legs 14 and 16, respectively. For example, a strap 74 can attach to the first and second pivot legs 14 and 16, respectively, and to itself using methods known to those skilled in the art such as VELCRO® and other hook and loop type attachments. The strap 74 can be made of any suitable material such as nylon or a flexible and/or stretchable material such as an elastic fabric cloth. In one embodiment, the strap 74 can be tightened about the leg using standard lacing to avoid harming delicate clothing with VELCRO®-type hook material.
Padding (not shown) can be placed on surfaces of the stirrup and/or pivot legs that are in contact with the wearer. The padding can be attached to these surfaces using, for example, VELCRO® strips glued, stitched or otherwise adhered to the surfaces and to the padding. Such use and attachment of padding to ankle braces is well known to those skilled in the art.
An ankle brace 10 constructed in accordance with the inventive concepts disclosed herein is viewed on the foot of a wearer in FIG. 5A, demonstrating how much closer the ankle brace can conform to the heel and ankle area of the foot compared to the bulkiness of a prior art ankle brace shown in FIG. 5B. This allows the user to more readily insert the stirrup 12 into a shoe. When not wearing the ankle brace 10, the user may choose to leave the stirrup 12 beneath, for example, a gel pad in a tennis shoe, and remove the first and second pivot legs 14 and 16, respectively, by detaching the retaining members 48 and 48′. This allows the shoes to be stored normally in, for example, a standard shoe box, without removal of the stirrup and padding. As the ankle mends and the entire ankle brace 10 is no longer necessary, a user may choose to wear only the stirrup 12. By wearing only the stirrup 12, a level of protection and support is still provided, but with even less bulk about the ankle and calf.
Typically, ankle braces are hinged with the pivot legs adjacent the ankle and the upper end of the upright legs external to the pivot legs as shown in FIG. 5B. This is done to reduce the rubbing and irritation of the ankle that occurs with forward and backward flexing. However, the presently disclosed ankle brace 10 reduces the contact of the brace with the ankle sufficiently to allow hinging with the first and second upright legs 20 and 22, respectively, adjacent the ankle and the first and second pivot legs 14 and 16, respectively, external to the upright legs. Such arrangement even further reduces the bulkiness of the ankle brace 10 allowing the ankle brace 10 to be even more readily fit within a shoe.
For example and referring now to FIG. 6, in one embodiment, the first upright leg 20 includes a round neck 44 about the first circular opening 26. The neck 44 can be an integral part of the first upright leg 20 and provides a pivot surface 46 on which the first upright leg 20 and the first pivot leg 14 can rotate about the axis 32. The first pivot leg 14 is rotatably secured to the first upright leg 20 using a retaining member 48 as described previously. The retaining member 48, when configured as a collar 50, has the retaining surface 52 positionable adjacent a perimeter 54′ of the first circular pivot opening 30. As previously described, a user can remove the retaining member 48 from the neck 44 to disconnect the first upright leg 20 from the first pivot leg 14.
From the above description, it is clear that the inventive concepts disclosed herein are well adapted to carry out the objects and to attain the advantages mentioned herein as well as those inherent in the inventive concepts disclosed herein. While exemplary embodiments of the inventive concepts disclosed herein have been described for purposes of this disclosure, it will be understood that numerous changes may be made which will readily suggest themselves to those skilled in the art and which are accomplished without departing from the scope of the inventive concepts disclosed herein and defined by the appended claims.

## Claims

1. An ankle brace, comprising:
a stirrup having a flat bottom portion and a first and second upright leg, each of the first and second upright legs having an upper end and a lower end, the upper end having a circular opening therethrough and the lower end attached to the flat bottom portion; and
first and second pivot legs rotatably connected to the first and second upright legs at first and second hinge assemblies respectively, and wherein the first and second pivot legs are releasably removable from the first and second upright legs at the first and second hinge assemblies respectively, each hinge assembly and each of the pivot legs having a circular pivot opening therethrough such that in a connected configuration, each circular pivot opening overlaps the circular opening in the respective upright leg, and each pivot leg is rotatable about an axis through and perpendicular to the circular pivot opening when the ankle brace is worn;
wherein each hinge assembly comprises a neck about the circular pivot opening, the neck having a continuous annular circumference; and
wherein the circular openings in the first and second upright legs and the circular pivot openings are positioned and sufficiently large to allow at least a portion of each malleolus of an ankle to protrude therethrough when the ankle brace is worn.

2. The ankle brace of claim 1, wherein the neck in the first hinge assembly is extendable through the circular opening in the first upright leg and securable to the first upright leg by a retaining member, and wherein the first upright leg is rotatable about the neck.

3. The ankle brace of claim 2, wherein the retaining member comprises a collar securable to an outer end of the neck.

4. The ankle brace of claim 3, wherein the collar is an open collar.

5. The ankle brace of claim 2, wherein the retaining member comprises an end cap with a collar securable to an outer end of the neck.

6. The ankle brace of claim 2, wherein the retaining member comprises threads securable to threads on an outer end of the neck.

7. The ankle brace of claim 2, wherein the retaining member is configured to snap fit with an outer end of the neck.

8. The ankle brace of claim 2, wherein the neck in the second hinge assembly is extendable through the circular opening in the second upright leg and securable by a second retaining member, and wherein the second upright leg is rotatable about the neck in the second hinge assembly.

9. The ankle brace of claim 1, wherein the circular openings in each upright leg and the circular pivot openings in each pivot leg have a diameter between 11⁄4 inches and 21⁄2 inches.

10. The ankle brace of claim 1, further comprising a first and second resilient padding removeably attached to an inner surface of each of the first and second pivot legs respectively.

11. The ankle brace of claim 1, further comprising a connectable strap circumscribing at least a portion of the first and second pivot legs, respectively, to tighten the ankle brace about a wearer's leg.

12. The ankle brace of claim 1, wherein the neck in the first hinge assembly is extendable through the circular pivot opening in the first pivot leg and securable to the first pivot leg by a retaining member, wherein the first pivot leg is rotatable about the neck.

13. The ankle brace of claim 12, wherein the retaining member comprises a collar securable to an outer end of the neck.

14. The ankle brace of claim 13, wherein the collar is an open collar.

15. The ankle brace of claim 12, wherein the retaining member comprises an end cap with a collar securable to an outer end of the neck.

16. The ankle brace of claim 12, wherein the retaining member comprises threads securable to threads on an outer end of the neck.

17. The ankle brace of claim 12, wherein the retaining member is configured to snap fit with an outer end of the neck.

18. An ankle brace, comprising:
a stirrup having a flat bottom portion and a first and second upright lea, each of the first and second upright legs having an upper end and a lower end, the upper end having a circular opening therethrough and the lower end attached to the flat bottom portion; and
first and second pivot legs rotatably connected to the first and second upright legs at first and second hinge assemblies respectively, and wherein the first and second pivot legs are releasably removable from the first and second upright legs at the first and second hinge assemblies respectively, each hinge assembly and each of the pivot legs having a circular pivot opening therethrough such that in a connected configuration, each circular pivot opening overlaps the circular opening in the respective upright lea, and each pivot leg is rotatable about an axis through and perpendicular to the circular pivot opening when the ankle brace is worn; wherein the first hinge assembly comprises:
a first grommet having a first flange and a first neck, the neck having a continuous annular circumference and fitting through the circular opening in the first upright leg and through the circular pivot opening in the first pivot leg; and
a first retaining member releasably attached to an end of the first neck opposite the first flange and
wherein the circular openings in the first and second upright legs and the circular pivot openings are positioned and sufficiently large to allow at least a portion of each malleolus of an ankle to protrude therethrough when the ankle brace is worn.

19. The ankle brace of claim 18, wherein the second hinge assembly comprises:
a second grommet having a second flange and a second neck, the second neck having a continuous annular circumference and fitting through the circular opening in the second upright leg and through the circular pivot opening in the second pivot leg; and
a second retaining member releasably attached to an end of the second neck opposite the second flange.