Patents by Inventor Youfa Cheng

Youfa Cheng 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).

  • Slope trimming attachment and working machine
    Patent number: 12680239
    Abstract: A slope trimming attachment includes a base, a first cutting device, a leveling mechanism and a turning mechanism. The first cutting device and the leveling mechanism are respectively arranged on the turning mechanism. The turning mechanism is rotatably arranged on the base and is configured to be able to adjust an angle of the cutting surface of the first cutting device relative to the slope surface and an angle of the leveling surface of the leveling mechanism relative to the slope surface through rotation. A working machine with the disclosed slope trimming attachment is not only convenient to operate, but also realizes the simultaneous execution of cutting, leveling and compacting operations on the slope surface, improves the construction efficiency of the slope surface trimming, and thereby ensuring the construction quality.
    Type: Grant
    Filed: April 29, 2022
    Date of Patent: July 14, 2026
    Assignee: SANY HEAVY MACHINERY LIMITED
    Inventors: Hao Chen, Yunlong Zhang, Youfa Cheng
  • SLOPE TRIMMING ATTACHMENT AND WORKING MACHINE
    Publication number: 20240229373
    Abstract: A slope trimming attachment includes a base, a first cutting device, a leveling mechanism and a turning mechanism. The first cutting device and the leveling mechanism are respectively arranged on the turning mechanism. The turning mechanism is rotatably arranged on the base and is configured to be able to adjust an angle of the cutting surface of the first cutting device relative to the slope surface and an angle of the leveling surface of the leveling mechanism relative to the slope surface through rotation. A working machine with the disclosed slope trimming attachment is not only convenient to operate, but also realizes the simultaneous execution of cutting, leveling and compacting operations on the slope surface, improves the construction efficiency of the slope surface trimming, and thereby ensuring the construction quality.
    Type: Application
    Filed: April 29, 2022
    Publication date: July 11, 2024
    Inventors: Hao Chen, Yunlong Zhang, Youfa Cheng