Patents by Inventor Tadakazu Nagata

Tadakazu Nagata 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: 11231005
    Abstract: An engine starter apparatus includes a starter motor, a temperature sensor configured to detect a temperature of the starter motor, a light source integrated with the starter motor, and a controller operatively connected to the temperature sensor and the light source. The controller is configured to illuminate the light source in a first color in response to the temperature of the starter motor exceeding a first temperature threshold. The controller is configured to illuminate the light source further in a second color in response to the temperature of the starter motor exceeding a second temperature threshold. The second temperature threshold is greater than the first temperature threshold. The first and second color are different. The second temperature threshold corresponds to a life limit of the starter motor. Illumination of the light source indicates an overheated starter motor, which may warrant a replacement of the starter motor.
    Type: Grant
    Filed: April 10, 2020
    Date of Patent: January 25, 2022
    Assignee: DENSO INTERNATIONAL AMERICA, INC.
    Inventors: Fouad Rachid Dallal, Joe Lubinski, Landen Green, Trevor Adam Rowe, Ilco Aksovski, Tadakazu Nagata
  • Publication number: 20210317810
    Abstract: An engine starter apparatus includes a starter motor, a temperature sensor configured to detect a temperature of the starter motor, a light source integrated with the starter motor, and a controller operatively connected to the temperature sensor and the light source. The controller is configured to illuminate the light source in a first color in response to the temperature of the starter motor exceeding a first temperature threshold. The controller is configured to illuminate the light source further in a second color in response to the temperature of the starter motor exceeding a second temperature threshold. The second temperature threshold is greater than the first temperature threshold. The first and second color are different. The second temperature threshold corresponds to a life limit of the starter motor. Illumination of the light source indicates an overheated starter motor, which may warrant a replacement of the starter motor.
    Type: Application
    Filed: April 10, 2020
    Publication date: October 14, 2021
    Inventors: Fouad Rachid DALLAL, Joe LUBINSKI, Landen GREEN, Trevor Adam ROWE, Ilco AKSOVSKI, Tadakazu NAGATA
  • Patent number: 8054051
    Abstract: The present invention provides, as one aspect, an apparatus for detecting an abnormality of a generator for vehicles. The generator includes a multi-phase armature winding that has phase windings and a rectifier that rectifies multi-phase output of the armature winding. The apparatus includes a first period detection unit that detects a first period of an output voltage of the generator, a second period detection unit that detects a second period of an voltage of one of the phase windings, and an abnormality determination unit that determines presence or absence of an abnormality of the generator by comparing the first period with the second period.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: November 8, 2011
    Assignee: Denso Corporation
    Inventors: Tadakazu Nagata, Toshinori Maruyama
  • Publication number: 20090218992
    Abstract: The present invention provides, as one aspect, an apparatus for detecting an abnormality of a generator for vehicles. The generator includes a multi-phase armature winding that has phase windings and a rectifier that rectifies multi-phase output of the armature winding. The apparatus includes a first period detection unit that detects a first period of an output voltage of the generator, a second period detection unit that detects a second period of an voltage of one of the phase windings, and an abnormality determination unit that determines presence or absence of an abnormality of the generator by comparing the first period with the second period.
    Type: Application
    Filed: February 27, 2009
    Publication date: September 3, 2009
    Applicant: DENSO CORPORATION
    Inventors: Tadakazu Nagata, Toshinori Maruyama