Patent ID: 6936074

Claim:
A prosthetic foot comprising a forefoot portion, a midfoot portion and a hindfoot portion, said hindfoot portion including an ankle joint permitting closed kinetic chain motion of the prosthetic foot in gait, said ankle joint having a joint axis oriented for permitting motion of said hindfoot portion about said ankle joint axis which is at least primarily in the sagittal plane, said ankle joint being formed integrally with said hindfoot portion by a strut of resilient material of said hindfoot portion, wherein a hole extends through said hindfoot portion along an anterior side of said strut of said ankle joint and wherein the hindfoot portion anterior to said hole includes a gap to permit said motion of said hindfoot portion about said ankle joint axis, and wherein said joint axis as porojected on a transverse plane is 8° to 30° externally rotated with the medial side more anterior than the lateral to the long axis of the foot.