Patent attributes
Disclosed are powered gait assistance systems that include a controller, sensors, and a motor coupled to a patient's thigh and lower leg and operable to apply assistive torque to the patient's knee joint to assist the patient's volitional knee pivoting muscle output during selected stages of the patient's gait cycle, such that the assistive torque applied by the motor improves the patient's leg posture, muscle output, range of motion, and/or other parameters over the gait cycle. The sensors can include a torque sensor that measures torque applied by the motor, a knee angle sensor, a foot sensor that measures ground contact of the patient's foot, and/or other sensors. The controller can determine what stage of the patient's gait cycle the patient's leg is in based on sensor signals and cause the motor to apply corresponding assistive torque to the knee based on the gait cycle stage, sensor inputs, and known patient characteristics.
