Abstract: A passive lumbar exoskeleton for assisting an operator in exerting efforts includes a compensation device arranged to provide assistive forces at a hip joint of the operator and a human-machine interface configured to secure the compensation device to the operator. The compensation device comprises an assistive torque assembly with a thigh link rotatably connected thereto. The thigh link defines a thigh cuff engageable by the operator to impose resistive moments on the compensation device. The assistive torque assembly comprises extension and flexion stop surfaces to define an allowed degree of motion for the compensation device, a transparent range mechanism defining a range of motion wherein the operator can move about with no assistive forces applied, and an assistance regulation device arranged to adjust the degree of tension in an elastic mechanism.

Abstract: An exoskeleton system for assisting an operator in exerting efforts includes a frame having one or more degrees of freedom and supporting a compensation device arranged to provide assistive forces to a joint of the operator. The compensation device comprises a regulation device arranged to adjust a degree of tension in an elastic mechanism. The compensation device comprises a rotational stop assembly comprising both extension and flexion stops to define an allowed degree of motion of the compensation device, the rotational stop assembly provided with a safety lock for preventing movement in the compensation device.