Patents by Inventor Longhai Chen

Longhai Chen 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).

  • Trimmer head and grass trimmer
    Patent number: 11785884
    Abstract: A trimmer head includes a spool formed with a winding portion for winding a trimmer line and a head housing formed with an accommodating space for accommodating at least a portion of the spool. The trimmer head further includes an intermediate element for transmitting a torque between the spool and the head housing such that one of the spool and the head housing rotates with the other. The spool drives the intermediate element to rotate and the intermediate element is slidably connected to the spool in a direction along a rotation axis or parallel to the rotation axis. The spool does not move in the axial direction when the trimmer head of the grass trimmer is unwinding the trimmer line, thereby effectively avoiding the problem of the trimmer line jamming.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: October 17, 2023
    Assignee: Nanjing Chervon Industry Co., Ltd.
    Inventors: Jianpeng Guo, Sanglong Wang, Longhai Chen, Qi Zhang, Hao Wang, Toshinari Yamaoka, Fangjie Nie
  • TRIMMER HEAD AND GRASS TRIMMER
    Publication number: 20200236848
    Abstract: A trimmer head includes a spool formed with a winding portion for winding a trimmer line and a head housing formed with an accommodating space for accommodating at least a portion of the spool. The trimmer head further includes an intermediate element for transmitting a torque between the spool and the head housing such that one of the spool and the head housing rotates with the other. The spool drives the intermediate element to rotate and the intermediate element is slidably connected to the spool in a direction along a rotation axis or parallel to the rotation axis. The spool does not move in the axial direction when the trimmer head of the grass trimmer is playing the trimmer line, thereby effectively avoiding the problem of the trimmer line jamming.
    Type: Application
    Filed: April 13, 2020
    Publication date: July 30, 2020
    Inventors: Jianpeng Guo, Sanglong Wang, Longhai Chen, Qi Zhang, Hao Wang, Toshinari Yamaoka, Fangjie Nie