STRAPPING SYSTEM
A strapping system includes a flexible, textile strap having locking elements. The strap defines an attachment portion upon which a reinforcement element formed from a solid mass of polymeric material inseparably and integrally secures. The locking elements of the strap are embedded at least in part into the thickness of a reinforcement element.
Latest OSSUR hf Patents:
This application claims the benefit of priority from U.S. provisional patent applications 61/308,079, filed on Feb. 25, 2010, and 61/285,538, filed on Dec. 10, 2009, the entirety of each of these provisional applications is incorporated herein
FIELD OF THE INVENTIONThe invention is directed to strapping systems having polymeric reinforced sections, padding parts, and other features integrally and inseparably secured to a textile strap, preferably for use in an orthopedic or prosthetic device.
BACKGROUNDIn strapping systems for use in products such as but not limited to orthopedic devices, often significant loads are applied to the straps. Particularly, since straps in the strapping system are weaker or thinner than a stronger base to the orthopedic product, the straps may tear or weaken over a period of use due to a more rigid fastener securing the strap to the base. As a result, metal eyelets or grommets are often employed to reinforce the strap, or intermediary brackets are used between the base of the product and the strap so as to reduce the wear on the strap. Alternatively, there is no reinforcement of the strap and the strap is secured to the base merely by a fastener.
An example of an orthopedic device is found in U.S. patent application publication 2009/0287127, which is incorporated herein by reference. In this orthopedic device, embodied as a circumferential walker, a strap is mounted to a shell or base formed from a rigid plastic. The strap is secured to the shell by rivets. A grommet may be used to reinforce an opening in the strap to allow for the fastener to extend therethrough and secure the strap to the base. The combination of the grommet and rivet may rub against the shell, possibly leading to undesirable wear of the shell, and likewise causing discomfort to the wearer.
For the foregoing reasons, there is a need to provide an improved strapping system that provides for reinforcement of a strap that securely retains a strap to a fastener and a base while maintaining sufficient durability and strength for requisite applications.
SUMMARYIn accordance with an embodiment of the disclosure, a strapping system includes a flexible, textile strap having locking elements. The strap defines an attachment portion upon which a reinforcement element inseparably and integrally secures. The locking elements of the strap are embedded at least in part into the thickness of a reinforcement element.
In a variation of the strap, the locking elements are formed along a single side of the strap. The reinforcement element may be secured to a first side of a first end portion of the strap, or alternatively, the reinforcement element is secured to first and second sides of a first end portion of the strap.
In another variation, an opening extends through a thickness of the reinforcement element and the strap. The reinforcement element may further define a slot protruding therefrom either coincident with the strap. According to another variation, the reinforcement element defines an extension end portion arranged beyond an end portion of the strap which may define the slot. A first surface of the reinforcement element can have at least one gripping tab extending therefrom.
The reinforcement element may be contoured in a predetermined shape, and is flexible and resiliently bending from the predetermined shape to an additional shape upon the exertion of a force. The reinforcement element will return to the predetermined shape upon removal of the force. For example, the reinforcement element may have an arcuate shape in a first configuration formed as at least part of a cuff. The cuff is resilient to bending upon application of a force and substantially returns to the first configuration upon release of the force.
The strap may have different properties from the reinforcement element. For example, the strap can be substantially more flexible than the reinforcement element, where the reinforcement element can be flexible, rigid or substantially rigid. In an example, the reinforcement element may be substantially compressible, and particularly compressible relative to the strap. In another example, the reinforcement element is an elongate frame element formed from a substantially rigid material.
The reinforcement element may be secure along any part or length of a strap. The reinforcement element can form a structure that secures to a generally intermediate portion of a strap. The structure forms a slot that permits the extension of a second strap therethrough. In another variation, the reinforcement element forms a structure and secures to a generally intermediate portion of a strap. The first structure forms at least one slot along an exterior side thereof, and a second strap including a second structure having an engaging element is arranged to slidably interlock with the slot of the first structure. According to another variation, the reinforcement element forms a structure encasing opposed sides of the strap along an intermediate portion of the strap.
The numerous advantages, features and functions of the various embodiments of the strapping system will become readily apparent and better understood in view of the following description and accompanying drawings. The following description is not intended to limit the scope of the strapping system, but instead merely provides exemplary embodiments for ease of understanding.
In accordance with a first embodiment of a strapping system shown in
The strap 12 includes locking elements 16, such as loop from broken or unbroken loop material, which protrude from the surface of the strap 12. The reinforcement element 14 interlocks with the locking elements 16. For example, the reinforcement element 14 may be formed as a solid mass of molded material, such as Nylon, Polyurethane, Polypropylene, ABS, Acetal, Polyethylene, hard TPU or other suitable polymeric material which is not brittle and sufficiently strong for a desired application, having a thickness into which the locking elements 16 are present. Where softness or friction (such as minimizing or enhancing the friction of the reinforcement element against a base structure or for grasping by fingers) is required of the reinforcement material, preferred materials include thermoplastic polyethylene, silicone and soft thermoplastic polyurethane. When the molded reinforcement element 14 is cured, molded and thusly formed, the locking elements 16 are embedded in the thickness of the strap 12.
A preferred loop material may be any common material used to make straps, including loop material made from polypropylene, polyester, and nylon. Moreover, textiles of various types may likewise be used.
By understanding the expression “generally inseparable,” this means that the reinforcement element can only be removed from the strap with considerable exertion by effectively and wholly undesirably destroying the bond between the strap and the reinforcement element. The expression “integrally secured” connotes that the strap and the reinforcement element are formed as a unitary structure, particularly with the reinforcement element formed and melded, as in merged, with the strap through molding.
The reinforcement element 14 may have a variety of shapes and be formed from a variety of moldable materials. For example, as shown in the illustrated embodiment, the reinforcement element 14 may have a profile that corresponds in shape to the end portion of the strap 12. The reinforcement element can be molded to correspond to particular shapes either of the strap or the base structure.
In the embodiment shown herein, the reinforcement element 14 is located on a single side of the strap 12, specifically the side of the strap having the locking elements 16. In other variations, the reinforcement elements 14 may be formed on opposed sides of a strap 12.
According to the illustrated embodiment, the reinforcement element 14 is more rigid and has a greater hardness than the strap 12. In variations of the reinforcement element 14, the reinforcement element 14 may have softness and is formed generally as a padding element that is secured to a strap 12. In one variation, the reinforcement element 14 is only located at the end portion 15 of the strapping system 10 so as to allow for flexibility of the strapping system.
In variations to the embodiments provided herein, additional features may be formed on the reinforcement element 14. For example, a rivet structure may be formed on the reinforcement element. The rivet structure is provided to secure to a base structure of an orthopedic device.
In the following additional embodiments, any of these embodiments may be combined with a reinforcement element or similar element and a strap in the manner described in connection with the embodiment of
As shown in
The strap is not limited to being textile based, but may be of any appropriate type known to the skilled person including a molded polymeric strap. The strap may be secured to the reinforcement element by means different from locking elements, such as by molding over the strap with a polymeric material and by forming a bond between the strap and the molded material. Alternatively, the reinforcement element may be adhered to the textile strap.
Another embodiment of the strapping system is depicted in
The reinforcement element 34 may be constructed of a foamed polymeric material so as to form a cushion. In variations, the reinforcement element may be formed from any rigid, semi-rigid, flexible or soft polymeric material, depending on the desired application or purpose of the reinforcement element in combination with the strap.
In another embodiment of a strapping system,
The grasping element may be formed from a polymeric material that allows for easy gripping of the strap and may be flexible rather than rigid or semi-rigid. The grasping element also reinforces the end portion of the strap, thereby protecting the end portion of the strap and allowing it to more easily extend through a slot or attach to structure, in combination with the hook material 54.
In another embodiment, a strapping system 70 is shown in
The attachment tab 144 may include a malleable element 148 permitting the attachment tab 144 to flex and maintain a configuration to correspond to an anatomical portion. The attachment tab 144 may be formed in at least an open configuration 144A and a closed configuration 144B. The malleable element 148 may be an aluminum stay, whereas the attachment tab may be formed from a flexible polymeric material.
The hook elements 146 may be formed integrally with the attachment tab 144, or in the alternative, the hook elements may be formed separately from the attachment tab and secured therewith.
In both of the strapping system embodiments 170, 180, the elastic elements may be formed from a substantially elastic polymeric material.
In reference to
In an exemplary method, the strapping system includes the steps of placing a strap having locking elements in a mold, closing the mold to inject a heated polymeric material onto the locking elements, allowing the polymeric material to cool, opening the mold and removing the formed strapping system from the mold, and trimming off any runners, flash or excess. It is preferred that the strap be placed in a flat configuration in the mold so that the plastic does not flow to a side of the strap not carrying the locking elements.
While the foregoing embodiments have been described and shown, it is understood that alternatives and modifications of these embodiments, such as those suggested by others, may be made to fall within the scope of the invention. Moreover, any of the principles described herein may be extended to any other orthopedic devices or devices requiring a reinforced strap.
Claims
1. A strapping system, comprising:
- a flexible, textile strap having locking elements, and defining an attachment portion; and
- a reinforcement element inseparably and integrally secured to the attachment portion of the strap, the locking elements of the strap being embedded at least in part into the thickness of a reinforcement element.
2. The strapping system according to claim 1, wherein the locking elements are formed along a single side of the strap.
3. The strapping system according to claim 1, wherein the reinforcement element is secured to a first side of a first end portion of the strap.
4. The strapping system according to claim 1, wherein the reinforcement element is secured to first and second sides of a first end portion of the strap.
5. The strapping system according to claim 1, wherein an opening extends through a thickness of the reinforcement element and the strap.
6. The strapping system according to claim 1, wherein the reinforcement element includes a traction texture formed by a solid mass of molded polymeric material.
7. The strapping system according to claim 1, wherein the reinforcement element is flexible.
8. The strapping system according to claim 1, wherein a first surface of the reinforcement element includes plurality of gripping tabs extending therefrom.
9. The strapping system according to claim 1, wherein the reinforcement element is contoured in a predetermined shape, the reinforcement element being flexible and resiliently bending from the predetermined shape to an additional shape upon the exertion of a force, the reinforcement element returning to the predetermined shape upon removal of the force.
10. The strapping system according to claim 1, wherein the strap is substantially more flexible than the reinforcement element.
11. The strapping system according to claim 1, wherein the reinforcement element is substantially compressible.
12. The strapping system according to claim 11, wherein the reinforcement element has at least one protrusion extending therefrom, the reinforcement element secured to a free end portion of a strap.
13. The strapping system according to claim 1, wherein the reinforcement element is an elongate frame element formed from a substantially rigid material.
14. The strapping system according to claim 1, wherein the reinforcement element has an arcuate shape in a first configuration formed as at least part of a cuff, the cuff being resilient to bending upon application of a force and substantially returning to the first configuration upon release of the force.
15. The strapping system according to claim 1, wherein the reinforcement element forms a structure and secures to a generally intermediate portion of a strap, the structure forming a slot permitting the extension of a second strap therethrough.
16. The strapping system according to claim 1, wherein the reinforcement element forms a structure and secures to a generally intermediate portion of a strap, the first structure forming at least one slot along an exterior side thereof, a second strap including a second structure having an engaging element arranged to slidably interlock with the slot of the first structure.
17. The strapping system according to claim 1, wherein the reinforcement element forms a structure encasing opposed sides of the strap along an intermediate portion of the strap.
18. A strapping system, comprising:
- a flexible strap having a reinforced portion defining a plurality of locking elements; and
- a reinforcement element inseparably and integrally secured to the reinforced portion of the strap, the locking elements of the strap being embedded at least in part into the thickness of a reinforcement element;
- wherein the reinforcement element is contoured in a predetermined shape, the reinforcement element being flexible and resiliently bending from the predetermined shape to an additional shape upon the exertion of a force, the reinforcement element returning to the predetermined shape upon removal of the force.
19. The strapping system according to claim 18, wherein the reinforcement element defines a traction texture.
20. A strapping system, comprising:
- a flexible textile strap having a reinforced portion defining a plurality of locking elements; and
- a reinforcement element inseparably and integrally secured to the reinforced portion of the strap, the locking elements of the strap being embedded at least in part into the thickness of a reinforcement element;
- wherein the reinforcement element is contoured in a predetermined shape and is formed from a solid mass of molded polymeric material, the reinforcement element being flexible and resiliently bending from the predetermined shape to an additional shape upon the exertion of a force, the reinforcement element returning to the predetermined shape upon removal of the force.
International Classification: A44B 99/00 (20100101);