Patents by Inventor Mingjian Sun

Mingjian Sun 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).

  • Patent number: 11933327
    Abstract: A hydraulic actuator with no friction and zero leakage and its drive system are provided. The hydraulic actuator includes a thickened disc structure A and a thickened disc structure B. The second end face of the thickened disc structure A is connected with the first end face of the thickened disc structure B, and a control cavity is formed between the second end face of the thickened disc structure A and the first end face of the thickened disc structure B. The drive oil access hole is arranged on the thickened disc structure B, and the control cavity is connected with the drive oil access hole. The displacement output method based on elastic deformation is adopted, which completely avoids the nonlinear phenomena such as leakage and friction, and reduces the difficulty of high-precision control of the actuator.
    Type: Grant
    Filed: June 7, 2023
    Date of Patent: March 19, 2024
    Assignee: Shandong University
    Inventors: Kai Guo, Wei He, Jie Sun, Mingjian Sun
  • Publication number: 20240060516
    Abstract: A hydraulic actuator with no friction and zero leakage and its drive system are provided. The hydraulic actuator includes a thickened disc structure A and a thickened disc structure B. The second end face of the thickened disc structure A is connected with the first end face of the thickened disc structure B, and a control cavity is formed between the second end face of the thickened disc structure A and the first end face of the thickened disc structure B. The drive oil access hole is arranged on the thickened disc structure B, and the control cavity is connected with the drive oil access hole. The displacement output method based on elastic deformation is adopted, which completely avoids the nonlinear phenomena such as leakage and friction, and reduces the difficulty of high-precision control of the actuator.
    Type: Application
    Filed: June 7, 2023
    Publication date: February 22, 2024
    Applicant: Shandong University
    Inventors: Kai GUO, Wei HE, Jie SUN, Mingjian SUN
  • Patent number: 11731225
    Abstract: An electro-hydraulic micro-displacement platform, a micro-displacement system, a precision compensation system, and its method, comprises an x-direction guide rail and a y-direction guide rail slidingly connected with a cross slider respectively. The x-direction guide rail is fixed on the floor of the frame, and a z-direction fixed platform is fixed on the y-direction guide rail. The periphery of the z-direction fixed platform is connected with the side plate of the frame through the x-direction micro-displacement actuator and the y-direction micro-displacement actuator, the z-direction fixed platform is connected with the z-direction floating platform through the first z-direction micro-displacement actuator, the z-direction floating platform is connected with the z-direction auxiliary fixed platform through the second z-direction micro-displacement actuator, and the z-direction fixed platform is fixedly connected with the z-direction auxiliary fixed platform.
    Type: Grant
    Filed: January 19, 2023
    Date of Patent: August 22, 2023
    Assignee: Shandong University
    Inventors: Kai Guo, Wei He, Jie Sun, Mingjian Sun