Pivot-flex foot

A prosthetic device, comprising:

• an ankle component;
• a foot component coupled to the ankle component, wherein the foot component has a longitudinal length configured to extend at least partially along a sagittal plane of a user when the prosthetic device is in use, wherein the foot component has a thickness configured to extend at least partially along a transverse plane of the user when the prosthetic device is in use, and wherein the foot component comprises a lower cantilever leaf spring;
• and
• a coupling mechanism positioned between the foot component and the ankle component, wherein the coupling mechanism couples a rotation of the foot component with respect to the sagittal plane to a rotation of the foot component with respect to the transverse plane, wherein the coupling mechanism comprises one or more upper cantilever leaf springs each having a transverse cross-section defined by a width configured to extend at least partially along a coronal plane of the user when the prosthetic device is in use and a thickness configured to extend at least partially along the transverse plane of the user when the prosthetic device is in use, and wherein the transverse cross-section of the one or more upper cantilever leaf springs are each configured to be misaligned with the sagittal plane by a rotation angle when the prosthetic device is in use such that if the foot component is subjected to a bending moment along the sagittal plane, the sagittal plane bending moment will simultaneously deflect the foot component along both the sagittal plane and the transverse plane.