Patents by Inventor Asaharu Matsuo

Asaharu Matsuo 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).

  • Patent number: 6302648
    Abstract: A two stage jointed stationary blade of a high pressure or intermediate pressure steam turbine is formed with a bolt joint in place of a welded joint so as to make detachment and disassembly possible, and thereby facilitating maintenance and inspection work and reducing assembling man-hours. A stationary blade (front stage)(2), outer ring front portion (1) and inner ring front portion (3) are welded into an integral structure. A stationary blade (rear stage) 22, outer ring rear portion (21) and inner ring rear portion (23) are also welded into an integral structure. The outer ring front portion 1, outer ring center portion 10 and the outer ring rear portion 21 are mutually engaged via engaging portions (4, 11 and 12, 24) with precise positioning and then jointed together integrally by bolt (30).
    Type: Grant
    Filed: October 26, 1999
    Date of Patent: October 16, 2001
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Tetsu Konishi, Keizo Tanaka, Hideyuki Toda, Asaharu Matsuo, Toyokazu Kuwana, Ryotaro Magoshi
  • Patent number: 5984637
    Abstract: A cooling medium path structure for cooling a gas turbine blade. The structure includes a disk-side cooling medium path, a blade-side cooling medium path formed at the root portion of the blade and a delivery block disposed between the two cooling medium paths so as to establish communication therebetween. The delivery block is provided with an elastic engaging section which comes into elastic and line-contact with the disk-side cooling medium path and the blade-side cooling medium path. Thus, the sealing property of the contact portions of the structure is secured so as to allow a cooling medium to be supplied without leaking from the cooling medium paths. The heat of the cooling medium, generated as a result of cooling the high-temperature portion of the gas turbine, can be recovered so as to make the best use of the heated medium.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: November 16, 1999
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventor: Asaharu Matsuo