Patents by Inventor LIANGYU ZHENG

LIANGYU ZHENG 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).

  • Closed type medicine liquid transfer device and system with double-chamber internal circulation
    Patent number: 12274673
    Abstract: A medicine liquid transfer device includes a double-chamber syringe, a dispensing needle assembly, and a syringe needle sealing assembly. The medicine liquid transfer device features an exquisite structural design and easy assembly, enables fully-closed medicine preparation and transfer, and allows automatic or manual adjustment and balance of the air pressure inside the medicine container in use, thereby minimizing the risk of medicine leakage and providing an excellent leakproof effect, while having advantages of low cost, high convenience of use, and the like.
    Type: Grant
    Filed: March 2, 2023
    Date of Patent: April 15, 2025
    Assignee: GUANGDONG JIANLIYUAN MEDICAL TECHNOLOGY CO., LTD.
    Inventors: Rizhi Chen, Rongqiong Luo, Shigeng Xie, Weiquan Chen, Binghua Tang, Liangyu Zheng, Lizhen Yang
  • CLOSED TYPE MEDICINE LIQUID TRANSFER DEVICE AND SYSTEM WITH DOUBLE-CHAMBER INTERNAL CIRCULATION
    Publication number: 20250107970
    Abstract: A medicine liquid transfer device includes a double-chamber syringe, a dispensing needle assembly, and a syringe needle sealing assembly. The medicine liquid transfer device features an exquisite structural design and easy assembly, enables fully-closed medicine preparation and transfer, and allows automatic or manual adjustment and balance of the air pressure inside the medicine container in use, thereby minimizing the risk of medicine leakage and providing an excellent leakproof effect, while having advantages of low cost, high convenience of use, and the like.
    Type: Application
    Filed: March 2, 2023
    Publication date: April 3, 2025
    Inventors: RIZHI CHEN, RONGQIONG LUO, SHIGENG XIE, WEIQUAN CHEN, BINGHUA TANG, LIANGYU ZHENG, LIZHEN YANG