Patents by Inventor Fengchang LIU

Fengchang LIU 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).

  • Intraoral retractor for temporomandibular joint
    Patent number: 11266396
    Abstract: The invention discloses an intraoral retractor for a temporomandibular joint and relates to the technical field of medical instruments. The invention comprises a retraction mechanism, a main connecting rod and an operating mechanism; wherein the retraction mechanism and the main connecting rod are bent overall, one end of the retraction mechanism is a supporting end, and the other end is connected with the main connecting rod; a draw hook in a withdrawn state is provided in the supporting end, the operating mechanism is disposed at a tail end of the main connecting rod, and the operating mechanism can enable the draw hook to thrust out of the retraction mechanism and move up and down in the supporting end. The invention has a small size with the overall structure designed as a small bent pipe, the bending angle fits features of a human body, only a small incision is required for the retractor to enter the oral cavity of a patient, so the patient may suffer less pain, and no scar is left on the patient's face.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: March 8, 2022
    Assignee: CHAMFOND BIOTECH CO., LTD
    Inventors: Longjiang Li, Jianhua Zhang, Fengchang Liu, Wenke Zhang
  • INTRAORAL RETRACTOR FOR TEMPOROMANDIBULAR JOINT
    Publication number: 20200383673
    Abstract: The invention discloses an intraoral retractor for a temporomandibular joint and relates to the technical field of medical instruments. The invention comprises a retraction mechanism, a main connecting rod and an operating mechanism; wherein the retraction mechanism and the main connecting rod are bent overall, one end of the retraction mechanism is a supporting end, and the other end is connected with the main connecting rod; a draw hook in a withdrawn state is provided in the supporting end, the operating mechanism is disposed at a tail end of the main connecting rod, and the operating mechanism can enable the draw hook to thrust out of the retraction mechanism and move up and down in the supporting end. The invention has a small size with the overall structure designed as a small bent pipe, the bending angle fits features of a human body, only a small incision is required for the retractor to enter the oral cavity of a patient, so the patient may suffer less pain, and no scar is left on the patient's face.
    Type: Application
    Filed: October 25, 2018
    Publication date: December 10, 2020
    Inventors: Longjiang LI, Jianhua ZHANG, Fengchang LIU, Wenke ZHANG