Patents by Inventor Soichiro Tomioka

Soichiro Tomioka 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).

  • Reversible expansion valve
    Patent number: 4372486
    Abstract: An electrically operated reversible expansion valve. It has a valve body formed with a primary port, a secondary port, a valve seat defined between the primary and secondary ports, and a slide bore in an opposing relation to said valve seat. A valve needle is supported by the slide bore. In order to prevent the fluid from being admitted into a bimetal chamber through the slide bore, a bypass is provided between the primary port and the slide bore.
    Type: Grant
    Filed: April 22, 1981
    Date of Patent: February 8, 1983
    Assignee: Kabushiki Kaisha Saginomiya Seisakusho
    Inventors: Soichiro Tomioka, Yasuo Komiya