An artificial foot device, comprising: a talus body a core pivotably coupled with the talus body at a first joint and a biasing assembly (290) acting between the talus and the core at the first joint wherein the talus body pivots about the first joint and causes the biasing assembly to provide a torque response for the artificial foot device the first joint comprises a lateral axle (124a) extending from the talus body pivot bearings are coupled to the lateral axle and the talus body pivots about the pivot bearings and the pivot bearings slide along the core.
