Patents by Inventor Shoiji Katsumata

Shoiji Katsumata 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).

  • Control apparatus of electromagnetic drive valve and control method of the same
    Publication number: 20030038261
    Abstract: A rush adjuster which adjusts a relative position between a valve body and an armature in an axial direction so that a state of zero-rush is formed is arranged between an armature shaft and a valve shaft. At a time of starting an electromagnetic drive valve, a first starting current is applied to either one of an upper coil and a lower coil for generating electromagnetic forces for attracting the armature closer, whichever a distance with respect to the armature is shorter.
    Type: Application
    Filed: August 22, 2002
    Publication date: February 27, 2003
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shoiji Katsumata, Isao Matsumoto, Kazuhiko Shiratani, Tametoshi Mizuta, Keiji Yoeda, Makoto Ogiso, Hideyuki Nishida