Patents by Inventor Liu Chunhai

Liu Chunhai 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).

  • Apparatus for detecting spring stiffness
    Patent number: 9470613
    Abstract: The present invention discloses an apparatus for detecting spring stiffness which comprises a universal material testing machine, a loading beam of the universal material testing machine, a fixing rod of bracket for Belleville spring deformation detection, a movable clamping rod of bracket for Belleville spring deformation detection, a dial gauge, etc.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: October 18, 2016
    Assignee: Citic Dicastal Co. Ltd
    Inventors: Lyu Jinqi, Sun Hanbao, Tang Debin, Liu Chunhai, Zhu Zhihua, Wang Yongning, Li Changhai
  • APPARATUS FOR DETECTING SPRING STIFFNESS
    Publication number: 20150260623
    Abstract: The present invention discloses an apparatus for detecting spring stiffness which comprises a universal material testing machine, a loading beam of the universal material testing machine, a fixing rod of bracket for Belleville spring deformation detection, a movable clamping rod of bracket for Belleville spring deformation detection, a dial gauge, etc.
    Type: Application
    Filed: March 12, 2015
    Publication date: September 17, 2015
    Inventors: Lyu Jinqi, Sun Hanbao, Tang Debin, Liu Chunhai, Zhu Zhihua, Wang Yongning, Li Changhai
  • METHOD FOR IMPROVING MECHANICAL PROPERTIES OF ALUMINUM ALLOY CASTINGS
    Publication number: 20150252460
    Abstract: The present invention discloses a method for improving mechanical properties of aluminum alloy casting. The advantages of the present invention lie in: combining heat-treatment with thermal painting; dividing the solution treatment of conventional T6 heat treatment process into two separate solution treatments, which avoids deformation and overheating of the casting due to melting of the ternary eutectic structures with low melting point, thereby improving efficiency of the heat-treatment and lowering the amount of energy consumed and the cost of production.
    Type: Application
    Filed: March 5, 2015
    Publication date: September 10, 2015
    Inventors: Wang Lisheng, Zhang Zhendong, Liu Chunhai, Wang Yongning, Zhu Zhihua, Li Changhai