Patents by Inventor Dohyun Leem

Dohyun Leem has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240009864
    Abstract: Robotic systems and methods are provided with an end effector having lockable compliance. A robotic system for manipulating a workpiece includes an arm having a pair of sections connected by a joint assembly, with a lock disposed in the joint assembly. A gripper is connected on the arm and is configured to alternately grip and release the workpiece. A controller operates the lock to alternately lock and unlock the joint assembly. The gripper holds the workpiece during a deformation of the workpiece, while the controller may unlock the lock to allow movement of the joint assembly to relieve forces on the arm arising during a deformation of the workpiece.
    Type: Application
    Filed: July 5, 2022
    Publication date: January 11, 2024
    Applicants: GM GLOBAL TECHNOLOGY OPERATIONS LLC, Northwestern University
    Inventors: Joshua Lee Solomon, Hui-ping Wang, Lu Huang, Dalong Gao, Dohyun Leem
  • Publication number: 20230168165
    Abstract: A system for evaluating a rigidity of an angle bracket includes a test system having a first test fixture and a second test fixture. The system includes an angle bracket coupon including a first wall, a second wall coupled to the first wall at a bend to define an angle between the first wall and the second wall, and at least one three dimensional feature defined at the bend that extends between the first wall and the second wall. The angle bracket coupon is to be coupled to at least one of the first test fixture and the second test fixture to evaluate the rigidity of the angle bracket.
    Type: Application
    Filed: November 30, 2021
    Publication date: June 1, 2023
    Applicants: GM GLOBAL TECHNOLOGY OPERATIONS LLC, Northwestern University
    Inventors: Joshua Lee Solomon, Hui-ping Wang, Bradley J. Blaski, Vivian Vasquez, Lu Huang, Dohyun Leem, Jian Cao
  • Publication number: 20220118501
    Abstract: Novel systems and methods for an incremental forming process to manufacture a product are disclosed herein. The system and method generally involves continuously modifying the toolpath in real-time based upon the forming force of the forming tool compared to a predicted springback error established offline from a series of simplified simulations. The system and method disclosed herein are effective to form products with complex geometries and minimizes the costs and time requirements associated with prior art techniques.
    Type: Application
    Filed: February 14, 2020
    Publication date: April 21, 2022
    Inventors: Huaqing Ren, Jiaxi Xie, Shuheng Liao, Dohyun Leem, Jian Cao, Kornel F. Ehmann