Patents by Inventor Norimasa Asai

Norimasa Asai 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).

  • Electromagnetic solenoid drive apparatus in a vehicle
    Patent number: 4998177
    Abstract: An electromagnetic solenoid drive apparatus for use in a vehicle for turning on an electromagnetic solenoid from a battery every time when a command switch is turned on comprises first and second resistors connected in series to each other on an electric line for flowing an electric current through the electromagnetic solenoid; a first switching element turned on in a state in which an output voltage of the battery is lower than a predetermined threshold voltage and short-circuiting both ends of the first resistor; a timer circuit operated for only a constant time in association with the turning-on operation of the command switch; and a second switching element turned on during only the operating period of the timer circuit and short-circuiting both ends of the second resistor.
    Type: Grant
    Filed: March 29, 1989
    Date of Patent: March 5, 1991
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Koji Takizawa, Yukio Takaishi, Noriyuki Suzuki, Norimasa Asai, Koki Imaeda, Shigeru Iguchi, Kenichi Onishi, Hisatoshi Ohta, Masamitsu Suzuki