Patents by Inventor Xiangbao LIU

Xiangbao LIU 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).

  • PRESSURE-COMPENSATION HYDRAULIC PUMP, ROTATION SPEED CONTROL SYSTEM AND CONTROL METHOD, AND CONSTRUCTION MACHINERY
    Publication number: 20240011602
    Abstract: A pressure-compensation controlled hydraulic pump, comprising an electric proportional pressure compensator, a hydraulic pump, a hydraulic control reversing valve and a servo cylinder; the electric proportional pressure compensator can be electrically connected to a controller, a first hydraulic control port of the hydraulic control reversing valve is connected to an internal oil drain path, and is connected to an internal output oil path by means of a hydraulic control oil inlet path provided with a first throttle valve, a second hydraulic control port is connected to the internal output oil path, and the pressure difference between an opening pressure of the electric proportional pressure compensator and an oil outlet pressure of the hydraulic pump can drive the hydraulic control reversing valve to perform reversing, and selectively enable a piston chamber of the servo cylinder to be in communication with the internal output oil path or the internal oil drain path.
    Type: Application
    Filed: September 23, 2021
    Publication date: January 11, 2024
    Applicants: ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY CO., LTD., ZOOMLION SHAANXI WESTERN EARTHMOVING MACHINERY CO., LTD, Zoomlion Earthmoving Machinery Co., Ltd.
    Inventors: Xiangbao LIU, Yongfeng TIAN, Bo YI, Yuanfeng WU, Fujun DENG