Patents by Inventor Jian Gang QU

Jian Gang QU 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).

  • Publication number: 20250187132
    Abstract: An angle grinder includes a motor and an output member to which a grinding disc is attachable. A drive shaft transfers torque from the motor to the output member and defines a drive axis transverse to an output axis of the output member. A braking disc is coupled to the drive shaft, and a braking pad is linearly moveable relative to the braking disc in a single direction transverse to the drive axis between a first braking pad position and a second braking pad position. A biasing member biases the braking pad toward the first braking pad position. In response to an actuator being moved from a first actuator position to a second actuator position, the braking pad is moved from the first to the second braking pad position.
    Type: Application
    Filed: February 20, 2025
    Publication date: June 12, 2025
    Inventors: Jian Gang QU, Zhi Hai LIU, Ming Cong CHEN
  • Patent number: 12233504
    Abstract: An angle grinder comprises a motor and an output member to which a grinding disc is attachable. The output member defines an output axis. A drive shaft is configured to transfer torque from the motor to the output member. A braking disc is coupled to the drive shaft and a braking pad is moveable in a direction transverse to the drive axis between a first braking pad position and a second braking pad position, in which the braking pad is not in contact with the braking disc. A biasing member biases the braking pad toward the first braking pad position and a trigger is pivotable about a trigger axis between a first trigger position and a second trigger position. In response to the trigger being pivoted from the first to the second trigger position, the braking pad is moved from the first to the second braking pad position.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: February 25, 2025
    Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
    Inventors: Jian Gang Qu, Zhi Hai Liu, Ming Cong Chen
  • Patent number: 11548082
    Abstract: A powered threaded rod cutter configured to perform a cutting operation on a threaded rod includes a first cutting die and a second cutting die. At least the first cutting die includes a recess in which a first portion of the threaded rod is at least partly receivable, an electric motor, and a planetary transmission positioned downstream of the electric motor. The powered threaded rod cutter additionally includes a drivetrain for converting a rotational output of the planetary transmission to a pivoting movement of the second cutting die, and a guide against which a second portion of the threaded rod may contact to support the threaded rod to be perpendicular relative to the second cutting die prior to the cutting operation.
    Type: Grant
    Filed: September 28, 2021
    Date of Patent: January 10, 2023
    Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
    Inventor: Jian Gang Qu
  • Publication number: 20220168826
    Abstract: A powered threaded rod cutter configured to perform a cutting operation on a threaded rod includes a first cutting die and a second cutting die, at least the first cutting die including a recess in which a first portion of the threaded rod is at least partly receivable, an electric motor, and a planetary transmission positioned downstream of the electric motor. The powered threaded rod cutter additionally includes a drivetrain for converting a rotational output of the planetary transmission to a pivoting movement of the second cutting die, and a guide against which a second portion of the threaded rod may contact to support the threaded rod to be perpendicular relative to the second cutting die prior to the cutting operation.
    Type: Application
    Filed: September 28, 2021
    Publication date: June 2, 2022
    Inventor: Jian Gang Qu
  • Publication number: 20220102949
    Abstract: A fish tape for use with a fish tape tool. The fish tape includes an inner core formed of a first material, and an outer sheath surrounding the inner core formed of a second material that has a lower coefficient of friction than the first material.
    Type: Application
    Filed: September 28, 2021
    Publication date: March 31, 2022
    Inventors: Justin Miller, Nolan J. Henton, Samuel J. Krohlow, Sean T. Kehoe, Aaron C. Grode, Chun Ping Liu, Jian Gang Qu
  • Publication number: 20200189066
    Abstract: An angle grinder comprises a motor and an output member to which a grinding disc is attachable. The output member defines an output axis. A drive shaft is configured to transfer torque from the motor to the output member. A braking disc is coupled to the drive shaft and a braking pad is moveable in a direction transverse to the drive axis between a first braking pad position and a second braking pad position, in which the braking pad is not in contact with the braking disc. A biasing member biases the braking pad toward the first braking pad position and a trigger is pivotable about a trigger axis between a first trigger position and a second trigger position. In response to the trigger being pivoted from the first to the second trigger position, the braking pad is moved from the first to the second braking pad position.
    Type: Application
    Filed: December 12, 2019
    Publication date: June 18, 2020
    Inventors: Jian Gang QU, Zhi Hai LIU, Ming Cong CHEN