Patents by Inventor Toshimitsu Sugawara

Toshimitsu Sugawara 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: 4948093
    Abstract: A solenoid valve including a solenoid and a second solenoid to which a smaller electric current is applied han is applied to the first solenoid. The first solenoid is provided at a core, and the second solenoid is provided at a support member connected to the core. A cup-shaped plunger is connected to a valve body opening and closing a passage, and is moved in accordance with an energization of the solenoid, to open and close the valve body. A contact member is connected to the plunger and inclined relative to the bottom wall of the plunger, to come into tight contact with the support member. A first magnetic path is formed in the core and a cylindrical side wall of the plunger, and a second magnetic path is formed in the support member and the contact member.
    Type: Grant
    Filed: October 4, 1989
    Date of Patent: August 14, 1990
    Assignee: Tohoku Mikuni Kogyo Kabushiki Kaisha
    Inventors: Toshimitsu Sugawara, Takeshi Iinuma, Tadashi Suzuki
  • Patent number: 4914163
    Abstract: According to the present invention, heterocyclic copolymers comprising recurring units [A] and [B] having specific structures are obtained by hydrolyzing reaction products of diisocyanate compounds having specific structures with tolidine diisocyanate and hydrogen cyanide.The heterocyclic copolymers thus obtained are excellent in mechanical strength, heat resistance and solvent resistance.
    Type: Grant
    Filed: December 27, 1988
    Date of Patent: April 3, 1990
    Assignees: Tonen Sekiyu Kagaku Kabushiki Kaisha, Nitto Chemical Industry Co., Ltd.
    Inventors: Kazuyuki Sakota, Wataru Minoshima, Takayuki Masuda, Chihiro Imai, Tetsuro Nakahama, Toshimitsu Sugawara, Yoshio Nakagawa