Patent ID: 8597369

Claim:
A prosthetic/orthotic ankle-foot system comprising: a foot member; a shaft secured to the foot member for serving as an axis of rotation for the ankle-foot system; a support arm rotatably secured to the shaft; a first bumper interposed between the support arm and the foot member for maintaining and/or returning the support arm to a neutral position relative to the foot member; a first cam rotatably secured to the shaft; a second bumper interposed between the first cam and the foot member; a second cam rotatably secured to the support arm for engagement with the first cam; an upper housing movably secured to the support arm; and a link pivotally secured to both the upper housing and the second cam so that when the upper housing is moved toward the support arm, the second cam rotates downward into contact with the first cam, with dorsiflexion of the ankle-foot system causing rotation of the first cam and compression of the second bumper.