Patents by Inventor Shigeyoshi Ueno

Shigeyoshi Ueno 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).

  • Expansion valve
    Patent number: 6352207
    Abstract: In an expansion valve having a control mechanism with an airtight chamber, the airtight chamber is sealed by a steel ball joined into a filling hole in a metallic wall of the airtight chamber. The steel ball is fixed by resistance welding for sealing the filling hole. The diameter ratio between the inner diameter of the filling hole and the outer diameter of the spherical surface of the steel ball is set to a value falling in a range from 0.6 to 0.85.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: March 5, 2002
    Assignee: TGK Co., Ltd.
    Inventors: Satoshi Kawakami, Isao Sendo, Tatsuo Ito, Shigeyoshi Ueno