Patents by Inventor Jei Cheong RYU

Jei Cheong RYU 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).

  • Patent number: 11147693
    Abstract: The present invention relates to an artificial foot including a foot body part, a toe part rotatably disposed at a first end of the foot body part, a toe joint connecting the foot body part and the toe part to each other, and an adapter disposed on a top of a second end of the foot body part. According to the artificial foot, since the toes of the artificial foot rotate when a wearer walks, when the artificial toes come in contact with the ground, energy is stored due to the load by the weight and the toes kick off the ground as much as the elastic energy accumulated by the spring, so the toe members of the artificial foot do not drag on the ground. Accordingly, the wearer does not need to lift up the hip joints, so the wearer can walk similar to normal walking.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: October 19, 2021
    Assignee: Korea Workers' Compensation & Welfare Service
    Inventors: Hyun Cheol Kim, Suk Min Lee, Jeom Sik Song, Jei Cheong Ryu, Chil Yong Kwon, Hyeon Seok Cho
  • Publication number: 20200360158
    Abstract: The present invention relates to an artificial foot including a foot body part, a toe part rotatably disposed at a first end of the foot body part, a toe joint connecting the foot body part and the toe part to each other, and an adapter disposed on a top of a second end of the foot body part. According to the artificial foot, since the toes of the artificial foot rotate when a wearer walks, when the artificial toes come in contact with the ground, energy is stored due to the load by the weight and the toes kick off the ground as much as the elastic energy accumulated by the spring, so the toe members of the artificial foot do not drag on the ground. Accordingly, the wearer does not need to lift up the hip joints, so the wearer can walk similar to normal walking.
    Type: Application
    Filed: August 31, 2017
    Publication date: November 19, 2020
    Applicant: KOREA WORKERS' COMPENSATION & WELFARE SERVICE
    Inventors: Hyun Cheol KIM, Suk Min LEE, Jeom Sik SONG, Jei Cheong RYU, Chil Yong KWON, Hyeon Seok CHO
  • Patent number: 10405995
    Abstract: Provided is an artificial limb structure having a magnetic lock device. The artificial limb structure includes: an artificial limb coupled to a magnetic lock device; and a socket liner unit detachably coupled to the magnetic lock device, wherein the socket liner unit includes an attachment and detachment member attachable and detachable to/from the magnetic lock device by a magnetic force, and the magnetic lock device includes: permanent magnets; a magnetic flux control unit provided on the permanent magnets and transmitting the magnetic force generated by the permanent magnets to the attachment and detachment member or interrupting a transmission of the magnetic force; a magnetic force interrupting unit provided at the magnetic flux control unit and interrupting magnetic forces between permanent magnets arranged at opposite sides of the magnetic force interrupting unit; and a switch unit adjusting an arrangement of the permanent magnets with respect to the magnetic force interrupting unit.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: September 10, 2019
    Assignee: KOREA WORKS' COMPENSATION & WELFARE SERVICE
    Inventors: Jeom Sik Song, Suk Min Lee, Sin Gi Kim, Do Wan Kim, Jei Cheong Ryu
  • Publication number: 20180055657
    Abstract: Provided is an artificial limb structure having a magnetic lock device. The artificial limb structure includes: an artificial limb coupled to a magnetic lock device; and a socket liner unit detachably coupled to the magnetic lock device, wherein the socket liner unit includes an attachment and detachment member attachable and detachable to/from the magnetic lock device by a magnetic force, and the magnetic lock device includes: permanent magnets; a magnetic flux control unit provided on the permanent magnets and transmitting the magnetic force generated by the permanent magnets to the attachment and detachment member or interrupting a transmission of the magnetic force; a magnetic force interrupting unit provided at the magnetic flux control unit and interrupting magnetic forces between permanent magnets arranged at opposite sides of the magnetic force interrupting unit; and a switch unit adjusting an arrangement of the permanent magnets with respect to the magnetic force interrupting unit.
    Type: Application
    Filed: March 12, 2015
    Publication date: March 1, 2018
    Inventors: Jeom Sik SONG, Suk Min LEE, Sin Gi KIM, Do Wan KIM, Jei Cheong RYU