Patents by Inventor Xuelu Zhang

Xuelu Zhang 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).

  • Walking beam balanced span and moment regulating economized oil pump and a stroke regulating device of the same
    Patent number: 6450050
    Abstract: A walking beam balanced span and moment regulating oil pump having an arc, a walking beam, a support, a pitman, a base, a crank, a decelerator, a power machine, and a string device. The upper part or the lower part of the front end of a boom is articulated to the rear end of the walking beam, and between the lower part or the upper part of the boom and the rear end of the walking beam is placed a weighted arm regulator, and a weighted device is installed on the end of the boom. The walking beam balanced span and moment regulating oil pump is simple in structure, easy to operate, reliable in performance and less costly than conventional devices.
    Type: Grant
    Filed: March 30, 2000
    Date of Patent: September 17, 2002
    Assignee: No. 3 Machine Tool Plant of the Xinjiang Uygur Autonomous Region
    Inventors: Renquan Luo, Changle Gao, Xiangyun Ji, Xuelu Zhang, Shujian Ma