Patents by Inventor Masahiko Umetani

Masahiko Umetani 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).

  • Hollow fan moving blade
    Patent number: 5297937
    Abstract: A hollow rotor blade of a gas turbine includes a shaped core accommodated within a hollow space formed between two skins and joined to the skins. The fatigue strength at a portion where the skins are joined to the core is enhanced. More specifically, the portions of the skins joined with the core are in the form of island-shaped protrusions, and the core is joined to these protrusions by solid-phase diffusion bonding, diffusion-brazing, liquid-phase diffusion bonding, and the like.
    Type: Grant
    Filed: August 21, 1992
    Date of Patent: March 29, 1994
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Masahiko Umetani, Haruomi Makita