Patent ID: 7429272

Claim:
A prosthetic foot comprising: a longitudinally extending foot keel; a coupling element connected to the foot keel; a resilient, upstanding, anterior facing convexly curved calf shank above ankle joint height having a lower end connected to the coupling element to form an ankle joint area of the foot, and an upper end to connect with a supporting structure on an amputee's leg; wherein the coupling element includes a resilient material between the foot keel and calf shank, said resilient material being elongated in a direction forming a joint having an oblique joint axis permitting closed kinetic chain motion of the prosthetic foot in gait, the oblique joint axis as projected on a sagittal plane being deviated with respect to a transverse plane with the anterior of the joint axis more proximal than the posterior of the joint axis, wherein said resilient material oblique joint axis in response to gait force provides a means for frontal plane foot keel and transverse plane calf shank motions.