Patents by Inventor Sin Koga

Sin Koga 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).

  • Method of manufacturing axis seals having reduced gas leakage properties and a rotary machine using axis seals
    Patent number: 7334328
    Abstract: In a method of manufacturing an axis seal, first, a roll of rolled metal material is cut into metal material plates of a predetermined size. Next, metal material plates are etched from both sides so as to form a predetermined size. Subsequently, the thin metal plates are arranged so as to be in a ring shape, oriented in the same direction, and are welded so as to be fixed. Additionally, during these processes, heat treatment is performed by heating rolls of rolled metal materials or metal material plates or thin metal plates at a predetermined timing, thereby eliminating residual stress (strain).
    Type: Grant
    Filed: June 17, 2004
    Date of Patent: February 26, 2008
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Hidekazu Uehara, Tanehiro Sinohara, Takasi Nakano, Sin Nisimoto, Takayuki Kurimura, Yuichi Hirakawa, Tatsuji Takahasi, Sin Koga
  • Method of manufacturing axis seals, axis seals, axis seal members and rotary machine using axis seals
    Publication number: 20050125983
    Abstract: In a method of manufacturing an axis seal in accordance with the present invention, first, a roll of rolled metal material is cut out to predetermined size of metal material plates. Next, metal material plates are etched from both sides so as to form a predetermined size. Subsequently, the thin metal plates are arranged so as to be in a ring shape, orienting to the same direction, and are welded to be fixed. Additionally, during these processes, heat treatment is performed by heating rolls of rolled metal materials or metal material plates or thin metal plates at a predetermined timing, thereby eliminating residual stress (strain).
    Type: Application
    Filed: June 17, 2004
    Publication date: June 16, 2005
    Inventors: Hidekazu Uehara, Tanehiro Sinohara, Takasi Nakano, Sin Nisimoto, Takayuki Kurimura, Yuichi Hirakawa, Tatsuji Takahasi, Sin Koga