Patent ID: 8728171
Filing Date: 2014-05-20
Classification: A61F

Abstract:
1. Orthopedic foot device with a connection part for the lower leg, a swivel joint which acts as an ankle joint, a foot part rotatably connected to said swivel joint configured to rotate in a direction of dorsiflexion and a direction of plantar flexion relative to the connection part, a damping arrangement influencing rotational movement of said foot part about the swivel joint, a sensor arrangement for detecting action states of the foot part, and a control unit connected to the sensor arrangement which controls the damping arrangement, comprising within the sensor arrangement i) a torque sensor configured for measuring a torque of the ankle joint, ii) an angle sensor configured for measuring an ankle angle between the connection part and the foot part, and iii) an absolute-angle sensor configured for measuring an absolute angle of said foot part with respect to a plumb line, said control unit being configured to control exclusively by passive control said damping arrangement as a function of only said torque, said ankle angle, and said absolute angle respectively determined by said torque sensor, said angle sensor, and said absolute angle sensor each of i) heel-toe motion of said foot part in a stance phase of walking, ii) positioning of said foot part in a swing phase of walking, and iii) positioning and movability of said foot part whilst standing.