Patent ID: 6187052
Filing Date: 2001-02-13
Classification: A61F

Abstract:
A prosthetic ankle joint for connection between a pylon and a prosthetic foot for moving the foot between dorsiflexed and plantarflexed positions, the prosthetic ankle joint comprising:a base member adapted for connection to the prosthetic foot;a bracket member adapted for connection to the pylon; anda collapsible and expandable linkage assembly including a first recumbent bar at least operatively associated with the base member, a first upright bar having a lower end pivotally connected to the first recumbent bar at a first pivot joint and an upper end fixedly connected to the bracket member, a second upright bar having a lower end pivotally connected to the first recumbent bar at a second pivot joint, and a second recumbent bar pivotally connected between the first and second upright bars at third and fourth pivot joints, respectively, the first and second upright bars together with the first and second recumbent bars forming an interior space;wherein pivotal movement between the bracket member and the base member between dorsiflexed and plantarflexed positions causes deformation of the interior space.