Patents by Inventor Takatomi Hirai

Takatomi Hirai 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).

  • Electric car control apparatus
    Patent number: 7683558
    Abstract: An electric car control apparatus with which it is possible to make the size of equipment small. The control apparatus includes current detectors for respectively detecting currents flowing through collector shoes mounted on a leading car; a no-current indicator for outputting a no-current signal when the currents detected by these current detectors are zero; a no-current train line for transmitting the no-current signal to the following car; and disconnection timer mounted on each of the cars for, when inputting a speed signal and a no-current signal, in correspondence with the speed of the cars outputting a disconnection signal for causing a connector to disconnect after a predetermined time such that it is possible to determine that there is a dead section or gap.
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: March 23, 2010
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Takatomi Hirai
  • ELECTRIC CAR CONTROL APPARATUS
    Publication number: 20090038501
    Abstract: An electric car control apparatus with which it is possible to make the size of equipment small. The control apparatus includes current detectors for respectively detecting currents flowing through collector shoes mounted on a leading car; a no-current indicator for outputting a no-current signal when the currents detected by these current detectors are zero; a no-current train line for transmitting the no-current signal to the following car; and disconnection timer mounted on each of the cars for, when inputting a speed signal and a no-current signal, in correspondence with the speed of the cars outputting a disconnection signal for causing a connector to disconnect after a predetermined time such that it is possible to determine that there is a dead section or gap.
    Type: Application
    Filed: April 7, 2005
    Publication date: February 12, 2009
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Takatomi Hirai
  • Electric car control apparatus
    Patent number: RE44060
    Abstract: An electric car control apparatus with which it is possible to make the size of equipment small. The control apparatus includes current detectors for respectively detecting currents flowing through collector shoes mounted on a leading car; a no-current indicator for outputting a no-current signal when the currents detected by these current detectors are zero; a no-current train line for transmitting the no-current signal to the following car; and disconnection timer mounted on each of the cars for, when inputting a speed signal and a no-current signal, in correspondence with the speed of the cars outputting a disconnection signal for causing a connector to disconnect after a predetermined time such that it is possible to determine that there is a dead section or gap.
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: March 12, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventor: Takatomi Hirai