US Patent 9603768 Foot flexion and extension machine

An ankle flexion and extension machine including a lower leg backing beam having upper and lower ends; a support arm cantilevering from the lower leg backing beam; an arm mounting pivot joint interconnecting the lower leg backing beam's lower end and the support arm's proximal end; a foot plate; a plate mounting pivot joint interconnecting the foot plate and the support arm's distal end, the plate mounting pivot joint being adapted for facilitating dorsiflecting and plantarflecting pivoting movements of the foot plate with respect to the lower leg backing beam; a reversible electric motor connected operatively to the foot plate, the reversible electric motor being adapted for driving the pivoting movement of the foot plate; a floor support base; and a triangulating frame supporting the lower leg backing beam, the support arm and the foot plate over the floor support base.