Prosthetic foot with an adjustable ankle and method

A prosthetic foot (10) with an adjustable ankle (14, 14b, 14c, 14d, 14e) includes an upper portion (54e, 54f) coupled to a socket of an amputee. A lower portion (58e, 58f) is adjustably coupled to the upper portion, and is attached to a foot member (18) with heel and toe sections. A movable coupling is disposed between the upper and lower portions, and includes a projection (66e, 66f) slidable in an arcuate slot (70e, 70f). The movable coupling allows the toe section to pivot downward and the heel section to simultaneously displace forward. The adjustable ankle can be adjusted with an actuator (170, 170f) coupled to a tractor bolt (160) coupled between the upper and lower portions. A sensor (182, 182f, 184) is associated with the upper' portion or the lower portion to sense frequency of contact, force of contact, or orientation of the upper portion or the lower portion, and to output a corresponding output signal.