Patents by Inventor Hideaki Miyayashiki

Hideaki Miyayashiki 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).

  • Steam valve
    Patent number: 7931252
    Abstract: A steam valve is provided with a valve body, a valve seat, and a valve rod provided for the valve body. The valve body has a bottom portion to which a recessed portion is formed, and the recessed portion has an edge, which is positioned on an upstream side of a place at which a shock wave is generated in steam flowing through a steam path defined by the valve body and the valve seat.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: April 26, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Osamu Shindo, Hideaki Miyayashiki, Atsushi Narabe, Makoto Takahashi
  • STEAM VALVE
    Publication number: 20100006792
    Abstract: A steam valve is provided with a valve body, a valve seat, and a valve rod provided for the valve body. The valve body has a bottom portion to which a recessed portion is formed, and the recessed portion has an edge, which is positioned on an upstream side of a place at which a shock wave is generated in steam flowing through a steam path defined by the valve body and the valve seat.
    Type: Application
    Filed: August 28, 2009
    Publication date: January 14, 2010
    Inventors: Osamu SHINDO, Hideaki MIYAYASHIKI, Atsushi NARABE, Makoto TAKAHASHI
  • Main steam valve for a steam turbine
    Patent number: 7383859
    Abstract: A main steam valve with improved flow characteristic and enhanced reliability comprises a valve seat, a main valve body, and a bypass valve body. A side surface of the bypass valve body slidably fits into the inner surface of the main valve body and forms a steam inlet comprised of a plurality of rows of inlet openings arranged along the side surface. The openings are diametrically symmetrically arranged in the bypass valve, and the positions of the openings in each of the rows are shifted from the positions of openings in the next row.
    Type: Grant
    Filed: July 7, 2005
    Date of Patent: June 10, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Makoto Takahashi, Osamu Shindo, Atsushi Narabe, Hideaki Miyayashiki
  • Steam valve
    Publication number: 20070235670
    Abstract: A steam valve is provided with a valve body, a valve seat, and a valve rod provided for the valve body. The valve body has a bottom portion to which a recessed portion is formed, and the recessed portion has an edge, which is positioned on an upstream side of a place at which a shock wave is generated in steam flowing through a steam path defined by the valve body and the valve seat.
    Type: Application
    Filed: August 30, 2005
    Publication date: October 11, 2007
    Inventors: Osamu Shindo, Hideaki Miyayashiki, Atsushi Narabe, Makoto Takahashi
  • Main steam valve for a steam turbine
    Publication number: 20060005889
    Abstract: A main steam valve with improved flow characteristic and enhanced reliability comprises a valve seat, a main valve body, and a bypass valve body. A side surface of the bypass valve body slidably fits into the inner surface of the main valve body and forms a steam inlet comprised of a plurality of rows of inlet openings arranged along the side surface. The openings are diametrically symmetrically arranged in the bypass valve, and the positions of the openings in each of the rows are shifted from the positions of openings in the next row.
    Type: Application
    Filed: July 7, 2005
    Publication date: January 12, 2006
    Inventors: Makoto Takahashi, Osamu Shindo, Atsushi Narabe, Hideaki Miyayashiki
  • Combined valve configuration for steam cycle units
    Patent number: 5870896
    Abstract: A combined control/stop valve assembly for use in steam cycle plants which include at least one steam turbine, the valve assembly including a butterfly valve having a valve plate pivotable about a first axis, and a stop valve located downstream and adjacent the butterfly valve, the stop valve having a cylindrical strainer with a longitudinal axis substantially perpendicular to the first axis, the strainer having a solid portion facing the butterfly valve.
    Type: Grant
    Filed: November 5, 1997
    Date of Patent: February 16, 1999
    Assignees: General Electric Company, Kabushiki Kaisha Toshiba
    Inventors: Roger Bennett Clark, Jens Kure-Jensen, Hideaki Miyayashiki, Tomoo Ofuji