Patents by Inventor Tung-Hsing Chang

Tung-Hsing Chang 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).

  • Exercise machine having a hubless rotary mechanism
    Patent number: 9925411
    Abstract: An exercise machine includes a frame, a first rotary mechanism supported on the frame, a second rotary mechanism rotatably engaging with the first rotary mechanism, and a driving mechanism operatively coupled to the second rotary mechanism and configured to impart rotation of the second rotary mechanism while the driving mechanism is being actuated. The second rotary mechanism is hubless. The second rotary mechanism is configured to absorb and retain an amount of the actuation of the driving mechanism as a moment of inertia while the second rotary mechanism rotates.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: March 27, 2018
    Assignee: Dyaco International Inc.
    Inventors: Hsuan Fu Huang, Tung Hsing Chang, Han Lin Liu
  • Exercise machine having a hubless rotary mechanism
    Publication number: 20170128771
    Abstract: An exercise machine includes a frame, a first rotary mechanism supported on the frame, a second rotary mechanism rotatably engaging with the first rotary mechanism, and a driving mechanism operatively coupled to the second rotary mechanism and configured to impart rotation of the second rotary mechanism while the driving mechanism is being actuated. The second rotary mechanism is hubless. The second rotary mechanism is configured to absorb and retain an amount of the actuation of the driving mechanism as a moment of inertia while the second rotary mechanism rotates.
    Type: Application
    Filed: November 6, 2015
    Publication date: May 11, 2017
    Inventors: Hsuan Fu Huang, Tung Hsing Chang, Han Lin Liu
  • Elliptical exercise machine
    Patent number: D785730
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: May 2, 2017
    Assignee: Dyaco International Inc.
    Inventors: Hsuan-Fu Huang, Tung-Hsing Chang, Han-Lin Liu