Patents by Inventor Norimichi Kasegawa

Norimichi Kasegawa 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 device for differential limiting mechanisms of four-wheel drive car
    Patent number: 4874059
    Abstract: A control device for controlling differential limiting mechanisms of a four-wheel drive car provided with a central differential gear having a first differential limiting mechanism, a differential gear having a second differential limiting mechanism incorporated in a rear drive shaft and a differential gear incorporated in a front drive shaft includes sensors for detecting the rotational frequencies of the wheels, actuators for operating the respective differential limiting mechanisms and a controller. The controller controls the actuators such that the differential is greatly limited by the first differential limiting mechanism when a difference between the rotational frequencies of the front and rear wheels is larger than a predetermined value and the differential is greatly limited by the second differential limiting mechanism when a difference between the rotational frequencies of the left and right wheels is larger than a predetermined value.
    Type: Grant
    Filed: June 1, 1988
    Date of Patent: October 17, 1989
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Norimichi Kasegawa
  • Torque sensor
    Patent number: 4522278
    Abstract: A torque sensor generates an electric signal representing a change in the state of electromagnetic or electrostatic coupling between first and second rotors coupled together by a torsion spring. The change is caused with relative rotation of the two rotors caused by detected torque in a power assisted steering system of an automotive vehicle.
    Type: Grant
    Filed: February 15, 1984
    Date of Patent: June 11, 1985
    Assignees: Nippon Soken, Inc., Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Junji Kitagawa, Shigeyuki Akita, Norimichi Kasegawa, Akira Nakamura
  • Torque sensor
    Patent number: 4448275
    Abstract: A torque sensor generates an electric signal representing a change in the state of electromagnetic or electrostatic coupling between first and second rotors coupled together by a torsion spring. The change is caused with relative rotation of the two rotors caused by detected torque in a power assisted steering system of an automotive vehicle.
    Type: Grant
    Filed: November 27, 1981
    Date of Patent: May 15, 1984
    Assignees: Nippon Soken, Inc., Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Junji Kitagawa, Shigeyuki Akita, Norimichi Kasegawa, Akira Nakamura