Patents by Inventor Zihan Liao

Zihan Liao 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).

  • Contractible joint device for metal conduit
    Patent number: 6422611
    Abstract: An expansion joint device (10) used for metal conduits comprises an inlet short tube (1), an outlet short tube (2), and a sleeve (3). Both the opposed inside ends of the two short tubes (1, 2) are in the inside of the sleeve (3) and form a compensating gap (6) between them. A bellows member (7), axially expansible with an external force applying on, is provided in the compensating gap (6) formed between the opposed inside ends of the two short tubes (1, 2). The two ends of the bellows member (7) are respectively connected with the inside ends of the two short tubes (1, 2) in sealed manner. At least one of the two ends of said sleeve (3) is free end with respect to the two short tubes (1, 2).
    Type: Grant
    Filed: August 22, 2000
    Date of Patent: July 23, 2002
    Inventors: Jiesheng Jin, Yushi Zhou, Yuefang Liu, Chicheng Luo, Gengwu Li, Jiajing Pan, Zihan Liao, Xiaohong Li, Xia Li, Youren Rui, Shamen Ou, Jiyao Yang, Xijin Zhao, Zhu Li, Xueqin Li, Jianmin Deng