Patents by Inventor Lianpan Duan

Lianpan Duan 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).

  • Electro-hydraulic hybrid drive sand-mixing equipment
    Patent number: 11480040
    Abstract: The present invention discloses electro-hydraulic hybrid drive sand-mixing equipment, including a skid base, an electric motor, a hydraulic pump, a discharge centrifugal pump, a suction centrifugal pump, a mixing tank, a dry additive system, a liquid additive system, and a sand auger system. The electric motor, the hydraulic pump, the discharge centrifugal pump, the suction centrifugal pump, the mixing tank, the dry additive system, the liquid additive system, and the sand auger system are integrally skid mounted on the skid base. There are two electric motors, including a first electric motor and a second electric motor. The first electric motor drives the discharge centrifugal pump, and the second electric motor actuates the hydraulic pump, to drive the suction centrifugal pump, the mixing tank, the dry additive system, the liquid additive system, and the sand auger system. The electric motor is an integrated variable-frequency drive electric motor.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: October 25, 2022
    Assignee: YANTAI JEREH PETROLEUM EQUIPMENT & TECHNOLOGIES CO., LTD.
    Inventors: Maomao Han, Weiwei Liu, Yongcheng Liu, Yipeng Wu, Shuwei Li, Shijun Song, Lianpan Duan
  • ELECTRO-HYDRAULIC HYBRID DRIVE SAND-MIXING EQUIPMENT
    Publication number: 20200400005
    Abstract: The present invention discloses electro-hydraulic hybrid drive sand-mixing equipment, including a skid base, an electric motor, a hydraulic pump, a discharge centrifugal pump, a suction centrifugal pump, a mixing tank, a dry additive system, a liquid additive system, and a sand auger system. The electric motor, the hydraulic pump, the discharge centrifugal pump, the suction centrifugal pump, the mixing tank, the dry additive system, the liquid additive system, and the sand auger system are integrally skid mounted on the skid base. There are two electric motors, including a first electric motor and a second electric motor. The first electric motor drives the discharge centrifugal pump, and the second electric motor actuates the hydraulic pump, to drive the suction centrifugal pump, the mixing tank, the dry additive system, the liquid additive system, and the sand auger system. The electric motor is an integrated variable-frequency drive electric motor.
    Type: Application
    Filed: March 30, 2020
    Publication date: December 24, 2020
    Inventors: Maomao Han, Weiwei Liu, Yongcheng Liu, Yipeng Wu, Shuwei Li, Shijun Song, Lianpan Duan