Prosthetic feet and foot covers

• US 9,999,524 B2
• Filed: 06/30/2015
• Issued: 06/19/2018
• Est. Priority Date: 06/30/2014
• Status: Active Grant

• Current Assignee: Ossur hf
• Original Assignee: Ossur hf
• Inventors: Clausen, Arinbjrn Viggo, Gunnarsson, Ragnar rn, Andresson, Bjarni, Gunnsteinsson, Lrus, Cain, Rowan Patrick Robinson
• Primary Examiner(s): Woznicki, Jacqueline
• Application Number:
  US14/755,464
• Publication Number:
  US 20150374514A1
• Time in Patent Office: 1,085 Days
• CPC Class Codes: A61F 2/66 Feet; Ankle joints
• CPC Class Codes: A61F 2002/5001 Cosmetic coverings
• CPC Class Codes: A61F 2002/6614 Feet
• CPC Class Codes: A61F 2002/6621 Toes
• CPC Class Codes: A61F 2002/6628 Big toes
• CPC Class Codes: A61F 2002/665 Soles
• CPC Class Codes: A61F 2002/6671 C-shaped

Abstract

Prosthetic feet and foot covers that provide a more natural appearance and improved performance are provided. A foot element for a prosthetic foot can extend from a heel end to a toe end and include a heel, arch, forefoot, and toe regions. The forefoot region can be wider than the arch and heel regions. The toe region can include a U-shaped cut out to define a big toe. Various features of the foot element can guide rollover of the foot through the big toe during use. A foot cover can be designed to receive a prosthetic foot including such a foot element. The foot cover can have a region of increased flexibility at a transition between the forefoot region and toe region. The foot cover can also have a padded area extending from the heel region across a lateral part of the arch region and forefoot region.

Claims

1. A prosthetic foot comprising:

an elongate foot element extending from a heel end to a toe end and having an arch portion therebetween, wherein a ratio of a width of at least a portion of a forefoot portion of the foot element relative to a length of the foot element is approximately 30%, the foot element comprising a generally U-shaped cut-out portion at the toe end that is positioned toward a medial side of a longitudinal axis of the foot element, the cut-out portion dividing the toe end into a medial toe and a lateral toe portion, the medial toe being longer and extending further distally than the lateral toe portion, the medial toe being thicker than a remainder of the elongate foot element, the foot element further comprising a lengthwise split, wherein a first portion of the split runs substantially straight in an anterior/posterior direction and a second portion is curved; and

an upper foot element coupled to the foot element via fasteners inserted through one or more attachment holes in the elongate foot element, wherein a widest part of the forefoot portion is distal to the attachment holes,

wherein the elongate foot element further comprises a toe pad at the toe end, a bottom surface of the toe pad forming at least a portion of a bottom surface of the elongate foot element, the toe pad having a medial toe portion and a lateral toe portion that align respectively with the medial toe and the lateral toe portion of the foot element.

2. The prosthetic foot of claim 1, wherein the second portion of the split curves in a medial direction and extends to a base of the cut-out portion.

3. The prosthetic foot of claim 1, wherein the second portion of the split curves in a medial direction and extends to a medial edge of the foot element in the forefoot portion.

4. The prosthetic foot of claim 1, wherein the second portion of the split curves in a lateral direction and extends to a lateral edge of the foot element in the forefoot portion.

5. The prosthetic foot of claim 1, wherein the split begins in a circular opening.

6. The prosthetic foot of claim 5, wherein a ratio of a diameter of the opening to a width of the split is between 2:

1 to 6;

1.

7. The prosthetic foot of claim 1, wherein the second portion of the split begins distal to the attachment holes.

8. The prosthetic foot of claim 1, wherein the second portion of the split begins at a transition between the arch portion and forefoot portion.

9. The prosthetic foot of claim 1, wherein a length of the split is about 70% to about 90% of the length of the foot element.

10. The prosthetic foot of claim 2, wherein a juncture of the second portion of the split and the base of the cut-out portion comprises a blunted edge.