Patents by Inventor Wan Tzu CHIEN

Wan Tzu CHIEN 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).

  • Graphite cast iron nitrided piston ring
    Patent number: 10302197
    Abstract: A graphite cast iron nitrided piston ring has a main body including matrix and a nitrided layer. The matrix is made of graphite cast iron, and the nitrided layer is formed by subjecting a surface of the matrix to contact a cylinder to a gas nitriding process. With the nitrided layer formed at the surface of the matrix made of graphite cast iron, the piston ring has sufficient hardness and good abrasion resistance.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: May 28, 2019
    Assignee: JAPON TRAFFIC TECH CORP.
    Inventors: Wan Tzu Chien, Wei Te Wu, Chen Yu Chien, Chia Chun Li
  • GRAPHITE CAST IRON NITRIDED PISTON RING
    Publication number: 20180058582
    Abstract: A graphite cast iron nitrided piston ring has a main body including matrix and a nitrided layer. The matrix is made of graphite cast iron, and the nitrided layer is formed by subjecting a surface of the matrix to contact a cylinder to a gas nitriding process. With the nitrided layer formed at the surface of the matrix made of graphite cast iron, the piston ring has sufficient hardness and good abrasion resistance.
    Type: Application
    Filed: August 28, 2017
    Publication date: March 1, 2018
    Inventors: Wan Tzu CHIEN, Wei Te WU, Chen Yu CHIEN, Chia Chun LI