Patents by Inventor Shuzhi Yu

Shuzhi Yu 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).

  • Ni-25 heat-resistant nodular graphite cast iron for use in exhaust systems
    Patent number: 8454764
    Abstract: A nodular graphite, heat-resistant cast iron composition for use in engine systems. The composition contains carbon 1.5-2.4 weight %, silicon 5.4-7.0 weight %, manganese 0.5-1.5 weight %, nickel 22.0-28.0 weight %, chromium 1.5-3.0 weight %, molybdenum 0.1-1.0 weight %, magnesium 0.03-0.1 weight %, and a balance weight % being substantially iron. The composition has an austenitic matrix. Additionally, the composition exhibits excellent oxidation resistance at high temperature and excellent mechanical properties at both room and high temperatures. Thus, the composition can be a lower cost substitute material for Ni-Resist D5S under thermocycling conditions experienced by exhaust gas accessories and housings such as engine exhaust manifolds, turbocharger housings, and catalytic converter housings.
    Type: Grant
    Filed: February 25, 2008
    Date of Patent: June 4, 2013
    Assignee: Wescast Industries, Inc.
    Inventors: Robert Logan, Delin Li, Shuzhi Yu, Gangjun Liao
  • Ni-25 Heat-Resistent Nodular Graphite Cast Iron For Use In Exhaust Systems
    Publication number: 20110011070
    Abstract: A nodular graphite, heat-resistant cast iron composition for use in engine systems. The composition contains carbon 1.5-2.4 weight %, silicon 5.4-7.0 weight %, manganese 0.5-1.5 weight %, nickel 22.0-28.0 weight %, chromium 1.5-3.0 weight %, molybdenum 0.1-1.0 weight %, magnesium 0.03-0.1 weight %, and a balance weight % being substantially iron. The composition has an austenitic matrix. Additionally, the composition exhibits excellent oxidation resistance at high temperature and excellent mechanical properties at both room and high temperatures. Thus, the composition can be a lower cost substitute material for Ni-Resist D5S under thermocycling conditions experienced by exhaust gas accessories and housings such as engine exhaust manifolds, turbocharger housings, and catalytic converter housings.
    Type: Application
    Filed: February 25, 2008
    Publication date: January 20, 2011
    Applicant: WESCAST INDUSTRIES, INC.
    Inventors: Robert Logan, Delin Li, Shuzhi Yu, Gangjun Liao