Patents by Inventor Dong Lim Choi

Dong Lim Choi 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: 8925650
    Abstract: A slide-type core retainer for a sample collector including a sampler tube driven into a sea floor. The slide-type core retainer includes a catcher holder detachably coupled to a tip end of the sampler tube; a catcher installed on an inner peripheral surface of a tip end of the catcher holder and configured to allow sediment introduction into the sampler tube and preventing sediment from being lost using resiliency. A control member slidably installed inside the catcher holder controls opening and closing of the catcher. The control member is coupled to the catcher before sample collection so that the catcher remains opened. The control member slides into an inner side of the catcher holder while being separated from the catcher by the resistance of the solid sediment such that the catcher is closed, when resistance is generated by solid sediment after the sampler tube is driven into the sediment.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: January 6, 2015
    Assignee: Korea Ocean Research and Development Institute
    Inventors: Dong Lim Choi, Sung Rok Cho, Won Joon Shim, Moon Koo Kim, Kwan Koog Kim
  • Publication number: 20120073875
    Abstract: A slide-type core retainer for a sample collector including a sampler tube driven into a sea floor. The slide-type core retainer includes a catcher holder detachably coupled to a tip end of the sampler tube; a catcher installed on an inner peripheral surface of a tip end of the catcher holder and configured to allow sediment introduction into the sampler tube and preventing sediment from being lost using resiliency. A control member slidably installed inside the catcher holder controls opening and closing of the catcher. The control member is coupled to the catcher before sample collection so that the catcher remains opened. The control member slides into an inner side of the catcher holder while being separated from the catcher by the resistance of the solid sediment such that the catcher is closed, when resistance is generated by solid sediment after the sampler tube is driven into the sediment.
    Type: Application
    Filed: June 17, 2010
    Publication date: March 29, 2012
    Applicant: KOREA OCEAN RESEARCH AND DEVELOPMENT INSTITUTE
    Inventors: Dong Lim Choi, Sung Rok Cho, Won Joon Shim, Moon Koo Kim, Kwan Koog Kim