Patents by Inventor Hangfeng LI

Hangfeng LI 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).

  • Jack with a protecting structure of a pump piston and method for using the same
    Patent number: 11780717
    Abstract: A jack with a protecting structure of a pump piston and a method for using the same are provided. The jack includes a housing, a base located inside the housing, and the protecting structure. An oil cylinder and a pump body are installed on the base. A pump piston is installed on the pump body. A spring is installed on the pump piston and the pump body. A stop protrusion is arranged on the pump piston. The protecting structure includes a dustproof sleeve and a wool felt. The dustproof sleeve is installed on the base and the pump piston. One end of the dustproof sleeve is detachably fixed on the base through a fastener. The other end of the dustproof sleeve is connected to an end portion of the pump piston. The shape of the dustproof sleeve is set into a wavy type.
    Type: Grant
    Filed: March 23, 2021
    Date of Patent: October 10, 2023
    Assignee: FUYANG TONGLI INDUSTRIAL CO., LTD.
    Inventors: Guoliang He, Weixiang He, Gang Sun, Guannan Lu, Hangfeng Li
  • JACK WITH A PROTECTING STRUCTURE OF A PUMP PISTON AND METHOD FOR USING THE SAME
    Publication number: 20210316973
    Abstract: A jack with a protecting structure of a pump piston and a method for using the same are provided. The jack includes a housing, a base located inside the housing, and the protecting structure. An oil cylinder and a pump body are installed on the base. A pump piston is installed on the pump body. A spring is installed on the pump piston and the pump body. A stop protrusion is arranged on the pump piston. The protecting structure includes a dustproof sleeve and a wool felt. The dustproof sleeve is installed on the base and the pump piston. One end of the dustproof sleeve is detachably fixed on the base through a fastener. The other end of the dustproof sleeve is connected to an end portion of the pump piston. The shape of the dustproof sleeve is set into a wavy type.
    Type: Application
    Filed: March 23, 2021
    Publication date: October 14, 2021
    Applicant: FUYANG TONGLI INDUSTRIAL CO., LTD.
    Inventors: Guoliang HE, Weixiang HE, Gang SUN, Guannan LU, Hangfeng LI