Patents by Inventor Changhai Li

Changhai Li 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).

  • Piston ring having wear resistant composition
    Patent number: 7052018
    Abstract: The invention discloses a piston ring comprising a piston ring substrate. The piston ring substrate comprises at least 50 volume %, of at least one intermetallic alloy, based on the total volume of the wear-resistant composition. The invention further relates to a piston ring comprising a wear-resistant composite composition and a piston ring coating comprising a wear-resistant composition, the wear-resistant composite composition comprising a ceramic compound.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: May 30, 2006
    Assignee: Koncentra Marine & Power AB
    Inventors: Per Samuelsson, Karin Gong, Changhai Li, Mehdi Aram
  • Piston ring having wear resistant composition
    Publication number: 20050127612
    Abstract: A piston ring including at least one intermetallic alloy is provided. A piston ring having a wear-resistant composite composition and a piston ring coating comprising a wear-resistant composition are also provided.
    Type: Application
    Filed: December 14, 2004
    Publication date: June 16, 2005
    Applicant: Koncentra Holding AB
    Inventors: Mehdi Aram, Per Samuelsson, Karin Gong, Changhai Li
  • Intermetallic wear-resistant material for piston rings
    Publication number: 20040080114
    Abstract: The invention discloses a piston ring comprising a piston ring substrate. The piston ring substrate comprises at least 50 volume %, of at least one intermetallic alloy, based on the total volume of the wear-resistant composition. The invention further relates to a piston ring comprising a wear-resistant composite composition and a piston ring coating comprising a wear-resistant composition, the wear-resistant composite composition comprising a ceramic compound.
    Type: Application
    Filed: September 12, 2003
    Publication date: April 29, 2004
    Inventors: Per Samuelsson, Karin Gong, Changhai Li, Mehdi Aram
  • Molybdenum silicide material with high strength
    Patent number: 6482759
    Abstract: Molybdenum silicide material with high strength at both room temperature and high temperatures, comprising a composite material, which is made from a mixture including MoSi2 and ZrO2. The mixture includes 5-30 vol-% ZrO2 and 5-15 vol-% MoB, and the content of oxygen, in the form of SiO2 on or in particles of MoSi2, is below 0.5 weight-%. According to a further embodiment, the composite material comprises 3-35 vol-% SiC.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: November 19, 2002
    Assignee: Sandvik AB
    Inventors: Mats Sundberg, Changhai Li