Diabetic walker

• US 7,384,584 B2
• Filed: 12/21/2004
• Issued: 06/10/2008
• Est. Priority Date: 12/21/2004
• Status: Expired due to Fees

• Current Assignee: Orthomerica Products Incorporated
• Original Assignee: Orthomerica Products Incorporated
• Inventors: Sandifer, Alan T., Jerome, Matthew D., Schwenn, Shannon R.
• Primary Examiner(s): HEITBRINK, JILL LYNNE
• Application Number:
  US11/018,730
• Publication Number:
  US 20060135899A1
• Time in Patent Office: 1,267 Days
• Field of Search: 264/220, 264/222, 264/223, 264/225, 264/320, 295/271, 36/43, 36/44
• US Class Current: 264/222
• CPC Class Codes: A61F 5/0111 for the feet or ankles

Abstract

A boot having a hinged shell assembly sized and dimensioned to receive a person'"'"'s foot, and a customized insole. The shell assembly includes a lower shell, and an upper shell that overlaps the lower shell. The upper shell and lower shell are hinged together at or near a toe of the boot. In one instance, the upper and lower shell are hinged together by a tab that is part of the upper shell.

Claims

1. A method of producing a boot having an insole customized to fit a particular foot of a particular person comprising:

producing a form that at least partially duplicates the bottom and sides of the person'"'"'s foot;

selecting a boot shell assembly having a cavity sized and dimensioned to receive the person'"'"'s foot;

obtaining a boot mold that duplicates a portion of a bottom and sides of the cavity; and

producing a customized insole using the produced form to shape a foot receiving cavity of the insole including molding a first material to the produced form to create an upper lined material to provide a conforming surface for the person'"'"'s foot and using the upper lined material to press a second material into the boot mold to form a complementary bottom layer having a shape to conform with an interior surface of the boot shell assembly to form a bottom surface and sides of the customized inside.

2. The method of claim 1 further comprising pre-fabricating a plurality of shell assemblies where each shell assembly is one of a limited number of pre-selected sizes, and selecting a boot shell assembly comprises selecting one of the plurality of pre-fabricated shell assemblies.

3. The method of claim 2 further comprising pre-fabricating a plurality of ancillary assemblies to be used with the pre-fabricated shell assemblies wherein such ancillary assemblies comprise at least one of each of the following:

a fastening assembly, a sole assembly, and a weight distribution assembly.

4. The method of claim 2 further comprising pre-fabricating a plurality of ancillary assemblies to be used with the pre-fabricated shell assemblies wherein such ancillary assemblies comprise one or more of the following:

a fastening assembly, a sole assembly, and a weight distribution assembly.

5. The method of claim 4 further comprising using some of the pre-fabricated ancillary assemblies to produce a customized boot by combining a pre-fabricated shell assembly with at least one pre-fabricated ancillary assembly and the customized insole.

6. The method of claim 1 wherein producing a form that at least partially duplicates the bottom and sides of the foot comprises:

having the person use the foot to step on a layer of material to create a form mold foot cavity in the material that duplicates the bottom and sides of the foot;

filling the form mold foot cavity with a fill material that will solidify into a form that retains the shape of the form mold foot cavity; and

removing the form from the form mold foot cavity.

7. The method of claim 6 further comprising modifying the form such that it does not duplicate the bottom and sides of the toes of the foot as well as it did when it was first removed from the form mold foot cavity.

8. The method of claim 7 wherein modifying the form comprises filling indentations in the form and/or removing portions of the form.

9. The method of claim 1 wherein:

the first material is a tri-laminate material comprising

a first closed cell, polyethylene foam layer;

a frothed, open cell urethane sheet layer; and

a second closed cell, polyethylene foam layer having a higher density that the first closed cell, polyethylene foam layer; and

the second material is a foamed plastic.

10. A method of producing a diabetic boot customized to a foot, comprising the steps of:

forming a mold of the person'"'"'s foot;

using the mold to cast a form having a surface matching the bottom and sides of the person'"'"'s foot;

modifying the form to eliminate toe specific indentations;

molding a tri-laminate material to the form;

selecting a boot shell, from a plurality of different size boot shells based on the size of the person'"'"'s foot, ankle and calf;

using the tri-laminate material to press and enable a setting of a deformable material into a mold shaped to match a portion of the boot shell to form an insole with an upper surface of the tri-laminate material and a lower surface of the deformable material set to match the portion of the boot shell;

removing the insole of the tri-laminate material and set deformable material from the mold; and

inserting the insole into the selected boot shell.

11. The method of claim 10 wherein the insole includes tri-laminate material having a medium density closed cell polyethylene layer, a urethane layer, and a higher density closed cell polyethylene layer forming a foot receiving liner cavity, and a layer of polyethylene foam forming the lower external surface of the insole.

12. The method of claim 11 further modifying the insole to provide one or more recesses to accommodate one or more sores on the person'"'"'s foot.

13. The method of claim 11 further providing a flexible first front weight distribution liner and a flexible second rear weight distribution liner of respective size for conforming to the person'"'"'s foot and removably adhering the respective first and second liners to the boot shell.

14. The method of claim 13 wherein the selection of the boot shells is from a plurality of hinged boot shells comprising an upper shell hinged adjacent a toe portion to a lower shell.

15. The method of claim 14 further comprising providing a releasable fastening assembly to fasten the upper shell relative to the lower shell to encompass the person'"'"'s foot.

16. The method of claim 15 further comprising fitting a sole assembly of a rocker member and a tread member to a bottom surface of the lower shell for contact with a support surface.

17. The method of claim 14 further comprising positioning a first viscoelastic pad above the insole and between the first removable liner and the lower shell, and a second viscoelastic pad extending along a length of the second removable liner and positioned between the second removable liner and the upper shell.

18. The method of claim 17 wherein the first viscoelastic pad is coupled to the first removable liner by a hook-and-loop fastener, the second viscoelastic pad extends into pockets positioned at the ends of the second removable liner, the first liner is coupled to the bottom shell by a hook-and-loop fastener positioned near an upper end of the lower shell, the first removable liner has a lower end sandwiched between the insole and the lower shell, and the second removable liner is coupled to the upper shell by hook-and-loop fasteners coupled to the pockets holding the second viscoelastic pad.

19. The method of claim 13 wherein each liner includes a cloth exterior enclosing an open-cell polyester or polyether foam and has a thickness of less than 0.25 inches.

20. A method of producing a boot for a foot having an insole customized to fit a user'"'"'s foot, comprising the steps of:

producing a form that at least partially duplicates the bottom and sides of the user'"'"'s foot;

selecting a boot shell assembly, from a plurality of boot shell assemblies, having a cavity, sized and dimensioned, to receive both the user'"'"'s foot and a customized insole;

obtaining a boot mold that duplicates a portion of the bottom and sides of the cavity of the boot shell assembly;

producing the customized insole using the produced form to shape a foot receiving cavity of the insole and using the boot mold to shape the bottom and sides of the insole, wherein the customized insole comprises a tri-laminate material having a medium density closed cell polyethylene layer, a urethane layer, and a higher density closed cell polyethylene layer forming an upper surface cavity, and a layer of polyethylene foam forming the lower external surface of the insole; and

assembling the customized insole in the selected boot shell assembly.

21. The method of claim 20 wherein plurality of boot shell assemblies each include a lower shell and an upper shell that overlaps the lower shell.

22. The method of claim 21 further including fastening the upper shell and lower shell about the user'"'"'s foot with a pair of straps.

23. The method of claim 22 wherein the upper shell and lower shell are fastened by positioning each strap to overlay the upper shell at or above a bend in the shell where the shell transitions between an ankle and/or calf segment and a foot segment.

24. The method of claim 20 wherein the customized insole is provided with a foot receiving cavity having edges shaped to substantially conform to a perimeter of the user'"'"'s foot and a bottom shaped to substantially conform to the bottom of the user'"'"'s foot.

25. The method of claim 22 wherein the foot receiving cavity includes one or more recesses positioned to be adjacent to one or more sores or ulcers on the user'"'"'s foot.

26. The method of claim 25 wherein the insole has an external surface comprising the bottom and sides of the insole where the surface is sized and dimensioned to match the shape of the bottom and lower portions of the sides of the lower shell.