Patents by Inventor Hiromi Nakashima

Hiromi Nakashima 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).

  • Refractory protective blocks and protective wall structure of boiler using same
    Patent number: 5845610
    Abstract: A refractory protective block protects heat exchange means connecting tubes to fins. The refractory protective block has an inside complementary shape corresponding to the surface shape of the heat exchange means and the refractory protective block is provided with recesses into which projections formed on the tubes are fitted and received. A pair of projections formed on the two adjacent tubes in the heat exchange means are arranged so as to confront each other. The refractory protective block has a high durability which does not break even when heat exchange means expand more than the refractory block at the time of the repetition of heating and cooling and which enable the dispersion of strain at the time of the repetition of expansion and contraction.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: December 8, 1998
    Assignees: Mitsubishi Jukogyo Kabushiki, Krosaki Corporation
    Inventors: Tokuaki Hatta, Hiromi Nakashima, Shigeru Imamura, Arito Mizobe, Shigeki Ishimatsu, Akihiro Tachikawa