Patents by Inventor Yoong-Beom Lee

Yoong-Beom Lee 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).

  • Opposite way pressure detecting type shuttle relief valve
    Patent number: 5765590
    Abstract: The present invention provides a shuttle relief valve comprising a housing provided with left and right conduit holes respectively connected to the left and right conduits which are arranged between a pressure source and a hydraulic motor in a hydraulic circuit system, and a space portion communicating the conduit holes with each other. A spool is slidably disposed in the space portion so that the space portion is selectively opened or closed by the movement of the spool. A spring urges the spool into the position in which the space portion is closed, and a left cover is fitted in one hollow portion of the housing formed on one side of the space portion so that it supports the movement of the left portion of the spool. A bushing is fitted in the other hollow portion of the housing formed on the other side of the space portion so that it supports the movement of the right portion of the spool.
    Type: Grant
    Filed: April 3, 1996
    Date of Patent: June 16, 1998
    Assignee: Korea Institute of Machinery & Materials
    Inventors: Hyeong-Yee Kim, Yoong-Beom Lee