Patents by Inventor Changmeng SHAN

Changmeng SHAN 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).

  • MAIN HOIST SYSTEM OF ROTARY DRILLING RIG, AND CONTROL METHOD THEREFOR
    Publication number: 20230271814
    Abstract: A main winch system of a rotary drilling rig includes a main action loop, a pilot control loop, and a feedback control loop. The main action loop includes an engine, a hydraulic pump, a main control valve, a balance valve, a main winch motor, and an oil tank. The pilot control loop includes a pilot handle, a solenoid valve I, a pressure relay, and the main control valve in the main action loop. The feedback control loop includes a solenoid valve II and the hydraulic pump and the main control valve in the main action loop. In response to a lifting action of the pilot handle for the main winch, under the control of a button, the solenoid valve II is energized continuously, and the solenoid valve I is energized and de-energized according to a given rule.
    Type: Application
    Filed: December 3, 2020
    Publication date: August 31, 2023
    Applicant: XUZHOU XUGONG FOUNDATION CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Yonghua ZHANG, Yu SUN, Zhigang LIU, Changmeng SHAN, Hongchen QIU, Xiafang GAO, Xing GAO, Junyun SHAN, Qianbin GENG