Patents by Inventor Eisaku Nakashima

Eisaku 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).

  • Boiler scale collecting device before steam turbine
    Patent number: 6237341
    Abstract: A boiler scale collecting device enables collecting and recovery of most boiler scale particulates (p) in a steam flow line (f) in a steam pipe (02) extending from a power generation steam boiler to an inlet (01′) of a power generation steam turbine (01). The steam pipe (02), of constant inner diameter (d), extends from the boiler side to the inlet (01′) of the steam turbine (01), and turns at direction turning portion (e) from a vertical steam pipe (02′) to a lateral steam pipe (02″) near the inlet (01″) of the steam turbine (01). The vertical steam pipe (02′) is elongated beyond the direction turning portion (e) to form an elongated portion (02′a) having a lower end (02″a). The direction turning portion (e), including the vertical steam pipe (02′) and the lateral steam pipe (02″), and the elongated portion (02′a) are made in an integral unit of forged steel.
    Type: Grant
    Filed: July 16, 1999
    Date of Patent: May 29, 2001
    Assignees: Kyushu Electric Power Company, Mitsubishi Heavy Industries, Ltd.
    Inventors: Masami Koike, Yoshitaka Uchida, Akihiro Sato, Eisaku Nakashima, Toshihiro Sato, Keishi Suga, Masaharu Takada, Mutsuo Kuragasaki