Patents by Inventor Jiaxin ZHAO

Jiaxin ZHAO 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: 20250169002
    Abstract: A hinge mechanism includes a base, a first rotation component, and a second rotation component, and the first rotation component and the second rotation component are disposed on two sides of the base respectively. The first rotation component includes a first support arm, a first rotation plate, a first pin shaft, and a first torsion spring. The first support arm is rotatably coupled to the base. A first side of the first rotation plate is rotatably coupled to the first support arm via the first pin shaft. The first torsion spring is sleeved on the first pin shaft, a first torsion arm of the first torsion spring is fastened to the first support arm, and a second torsion arm of the first torsion spring abuts against the first side of the first rotation plate.
    Type: Application
    Filed: January 17, 2025
    Publication date: May 22, 2025
    Inventors: Weifeng Wu, Ding Zhong, Qiang Zhan, Leilei Hua, Jiaxin Zhao
  • Publication number: 20250169001
    Abstract: A foldable electronic device and a hinge mechanism thereof are provided. In addition to the hinge mechanism, the electronic device further includes two housings and a flexible display. The two housings are respectively disposed on two opposite sides of the hinge mechanism and are rotatably connected to the hinge mechanism. The hinge mechanism includes a base and a main shaft module. The base includes a bearing surface. The main shaft module includes two rotating assemblies. The two rotating assemblies are disposed on two opposite sides of the base. Each rotating assembly includes a swing arm and a housing fastening bracket, and each housing fastening bracket may be fastened to a housing on a corresponding side. In an unfolded state, the bearing surface independently supports a foldable portion of the flexible display. In a folded state, a screen accommodation space is formed between the two housing fastening brackets and the base.
    Type: Application
    Filed: January 17, 2025
    Publication date: May 22, 2025
    Inventors: Weifeng Wu, Ding Zhong, Qiang Zhan, Jiaxin Zhao, Leilei Hua
  • Patent number: 11834605
    Abstract: A geopolymer cementing fluid with controllable thickening time includes the following components in parts by weight: 100 parts of a cementitious material, 10 parts-30 parts of an activator, 0.2 parts-5 parts of a retarder, 0.4 parts-4 parts of an anti-settling agent, and 30 parts-70 parts of water. The geopolymer cementing fluid of the present invention has the advantages of controllable thickening time, excellent compressive strength, good settlement stability, good rheological properties, green and eco-friendly, and the like. The geopolymer cementing fluid can be better suited for the operations of oil and gas well cementing and ensure cementing safety.
    Type: Grant
    Filed: November 8, 2022
    Date of Patent: December 5, 2023
    Assignee: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
    Inventors: Shenglai Guo, Kunpeng Li, Yang Li, Ming Li, Jiaxin Zhao, Yuhuan Bu, Huajie Liu
  • Publication number: 20230235210
    Abstract: A geopolymer cementing fluid with controllable thickening time includes the following components in parts by weight: 100 parts of a cementitious material, 10 parts-30 parts of an activator, 0.2 parts-5 parts of a retarder, 0.4 parts-4 parts of an anti-settling agent, and 30 parts-70 parts of water. The geopolymer cementing fluid of the present invention has the advantages of controllable thickening time, excellent compressive strength, good settlement stability, good rheological properties, green and eco-friendly, and the like. The geopolymer cementing fluid can be better suited for the operations of oil and gas well cementing and ensure cementing safety.
    Type: Application
    Filed: November 8, 2022
    Publication date: July 27, 2023
    Applicant: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
    Inventors: Shenglai GUO, Kunpeng LI, Yang LI, Ming LI, Jiaxin ZHAO, Yuhuan BU, Huajie LIU
  • Patent number: 9391546
    Abstract: The present invention relates to a direct torque control method for inhibiting torque ripples, mainly comprising the following steps: establishing an MC voltage vector switching table visually displaying degrees of change in torque and flux, and, proposing, on the basis of the MC voltage vector switching table visually displaying the degrees of change in torque and flux, an MC-DTC mark-to-space ratio computing policy for torque quantification control. The MC-DTC mark-to-space ratio computing policy allows for inhibition of torque ripples of a PMSM speed control system and for a constant switching frequency, uses the MC voltage vector switching table visually displaying the degrees of change in torque and flux, has a simple algorithm, does not reply on motor parameters, and obviates the need for rotational coordinate transformation.
    Type: Grant
    Filed: December 24, 2012
    Date of Patent: July 12, 2016
    Assignee: TIANJIN UNIVERSITY
    Inventors: Changliang Xia, Jiaxin Zhao, Yan Yan
  • Publication number: 20150318807
    Abstract: The present invention relates to a direct torque control method for inhibiting torque ripples, mainly comprising the following steps: establishing an MC voltage vector switching table visually displaying degrees of change in torque and flux, and, proposing, on the basis of the MC voltage vector switching table visually displaying the degrees of change in torque and flux, an MC-DTC mark-to-space ratio computing policy for torque quantification control. The MC-DTC mark-to-space ratio computing policy allows for inhibition of torque ripples of a PMSM speed control system and for a constant switching frequency, uses the MC voltage vector switching table visually displaying the degrees of change in torque and flux, has a simple algorithm, does not reply on motor parameters, and obviates the need for rotational coordinate transformation.
    Type: Application
    Filed: December 24, 2012
    Publication date: November 5, 2015
    Applicant: Tianjin University
    Inventors: Changliang XIA, Jiaxin ZHAO, Yan Yan