Patents by Inventor Makoto Ooka

Makoto Ooka 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).

  • Compressive/Tensile-Load-Type Damper made of lead and seismic isolation apparatus using the same
    Patent number: 6164023
    Abstract: A compressive/tensile-load-type lead damper absorbs vibration energy by elastic-plastic deformation through bending of lead. The lead damper has a semicircular structural portion at a central portion, and compressive/tensile load input points at opposite ends of the semicircular structural portion. The center of an imaginary circle that overlaps the semicircular structural portion is located on a line connecting the load input points. The lead damper deforms by only a small amount upon receipt of compressive/tensile load and has a compact structure.
    Type: Grant
    Filed: December 16, 1998
    Date of Patent: December 26, 2000
    Assignees: Japan Nuclear Cycle Development Institute, Mitsubishi Heavy Industries, Ltd.
    Inventors: Morito Horikiri, Makoto Ooka, Hideo Machida, Syuichi Ishikura