公开(公告)号：US20250120873A1

公开(公告)日：2025-04-17

申请号：US18911616

申请日：2024-10-10

Applicant: Northeastern University

Inventor： Max Shepherd ,  Divyansh Gupta

IPC: A61H3/00 ,  A61H1/02 ,  B25J9/00 ,  B25J9/10 ,  B25J13/08

Abstract: The present disclosure provides a unidirectional actuator with customizable series elasticity. The actuator includes a winch, a cable coupled to the winch, a spring-loaded idler engaged with the cable, and a cam coupled to the spring-loaded idler. The spring-loaded idler comprises an idler arm and a spring member. The cam is shaped to provide a nonlinear stiffness versus force characteristic for the spring-loaded idler. The actuator can be applied in various applications, such as an ankle exoskeleton.